Compensate slope on start

The first frames are typically received and decoded with more delay than
the others, causing a wrong slope estimation on start.

To compensate, assume an initial slope of 1, then progressively use the
estimated slope.

BUILD.md

@@ -2,11 +2,43 @@
 
 Here are the instructions to build _scrcpy_ (client and server).
 
-You may want to build only the client: the server binary, which will be pushed
-to the Android device, does not depend on your system and architecture. In that
-case, use the [prebuilt server] (so you will not need Java or the Android SDK).
 
-[prebuilt server]: #prebuilt-server
+## Simple
+
+If you just want to install the latest release from `master`, follow this
+simplified process.
+
+First, you need to install the required packages:
+
+```bash
+# for Debian/Ubuntu
+sudo apt install ffmpeg libsdl2-2.0-0 adb wget \
+                 gcc git pkg-config meson ninja-build libsdl2-dev \
+                 libavcodec-dev libavdevice-dev libavformat-dev libavutil-dev
+```
+
+Then clone the repo and execute the installation script
+([source](install_release.sh)):
+
+```bash
+git clone https://github.com/Genymobile/scrcpy
+cd scrcpy
+./install_release.sh
+```
+
+When a new release is out, update the repo and reinstall:
+
+```bash
+git pull
+./install_release.sh
+```
+
+To uninstall:
+
+```bash
+sudo ninja -Cbuild-auto uninstall
+```
+
 
 ## Branches
 
@@ -59,12 +91,11 @@ Install the required packages from your package manager.
 sudo apt install ffmpeg libsdl2-2.0-0 adb
 
 # client build dependencies
-sudo apt install gcc git pkg-config meson ninja-build \
-                 libavcodec-dev libavformat-dev libavutil-dev \
-                 libsdl2-dev
+sudo apt install gcc git pkg-config meson ninja-build libsdl2-dev \
+                 libavcodec-dev libavdevice-dev libavformat-dev libavutil-dev
 
 # server build dependencies
-sudo apt install openjdk-8-jdk
+sudo apt install openjdk-11-jdk
 ```
 
 On old versions (like Ubuntu 16.04), `meson` is too old. In that case, install
@@ -106,13 +137,13 @@ sudo apt install mingw-w64 mingw-w64-tools
 You also need the JDK to build the server:
 
 ```bash
-sudo apt install openjdk-8-jdk
+sudo apt install openjdk-11-jdk
 ```
 
 Then generate the releases:
 
 ```bash
-make -f Makefile.CrossWindows
+./release.sh
 ```
 
 It will generate win32 and win64 releases into `dist/`.
@@ -173,12 +204,12 @@ brew install pkg-config meson
 ```
 
 Additionally, if you want to build the server, install Java 8 from Caskroom, and
-make it avaliable from the `PATH`:
+make it available from the `PATH`:
 
 ```bash
 brew tap homebrew/cask-versions
-brew cask install adoptopenjdk/openjdk/adoptopenjdk8
-export JAVA_HOME="$(/usr/libexec/java_home --version 1.8)"
+brew install adoptopenjdk/openjdk/adoptopenjdk11
+export JAVA_HOME="$(/usr/libexec/java_home --version 1.11)"
 export PATH="$JAVA_HOME/bin:$PATH"
 ```
 
@@ -189,8 +220,27 @@ See [pierlon/scrcpy-docker](https://github.com/pierlon/scrcpy-docker).
 
 ## Common steps
 
-If you want to build the server, install the [Android SDK] (_Android Studio_),
-and set `ANDROID_SDK_ROOT` to its directory. For example:
+**As a non-root user**, clone the project:
+
+```bash
+git clone https://github.com/Genymobile/scrcpy
+cd scrcpy
+```
+
+
+### Build
+
+You may want to build only the client: the server binary, which will be pushed
+to the Android device, does not depend on your system and architecture. In that
+case, use the [prebuilt server] (so you will not need Java or the Android SDK).
+
+[prebuilt server]: #option-2-use-prebuilt-server
+
+
+#### Option 1: Build everything from sources
+
+Install the [Android SDK] (_Android Studio_), and set `ANDROID_SDK_ROOT` to its
+directory. For example:
 
 [Android SDK]: https://developer.android.com/studio/index.html
 
@@ -203,20 +253,11 @@ export ANDROID_SDK_ROOT=~/Library/Android/sdk
 set ANDROID_SDK_ROOT=%LOCALAPPDATA%\Android\sdk
 ```
 
-If you don't want to build the server, use the [prebuilt server].
-
-Clone the project:
-
-```bash
-git clone https://github.com/Genymobile/scrcpy
-cd scrcpy
-```
-
 Then, build:
 
 ```bash
 meson x --buildtype release --strip -Db_lto=true
-ninja -Cx
+ninja -Cx  # DO NOT RUN AS ROOT
 ```
 
 _Note: `ninja` [must][ninja-user] be run as a non-root user (only `ninja
@@ -225,9 +266,27 @@ install` must be run as root)._
 [ninja-user]: https://github.com/Genymobile/scrcpy/commit/4c49b27e9f6be02b8e63b508b60535426bd0291a
 
 
-### Run
+#### Option 2: Use prebuilt server
 
-To run without installing:
+ - [`scrcpy-server-v1.18`][direct-scrcpy-server]  
+   _(SHA-256: 641c5c6beda9399dfae72d116f5ff43b5ed1059d871c9ebc3f47610fd33c51a3)_
+
+[direct-scrcpy-server]: https://github.com/Genymobile/scrcpy/releases/download/v1.18/scrcpy-server-v1.18
+
+Download the prebuilt server somewhere, and specify its path during the Meson
+configuration:
+
+```bash
+meson x --buildtype release --strip -Db_lto=true \
+    -Dprebuilt_server=/path/to/scrcpy-server
+ninja -Cx  # DO NOT RUN AS ROOT
+```
+
+The server only works with a matching client version (this server works with the
+`master` branch).
+
+
+### Run without installing:
 
 ```bash
 ./run x [options]
@@ -242,32 +301,16 @@ After a successful build, you can install _scrcpy_ on the system:
 sudo ninja -Cx install    # without sudo on Windows
 ```
 
-This installs two files:
+This installs three files:
 
  - `/usr/local/bin/scrcpy`
  - `/usr/local/share/scrcpy/scrcpy-server`
-
-Just remove them to "uninstall" the application.
+ - `/usr/local/share/man/man1/scrcpy.1`
 
 You can then [run](README.md#run) _scrcpy_.
 
-
-## Prebuilt server
-
- - [`scrcpy-server-v1.17`][direct-scrcpy-server]  
-   _(SHA-256: 11b5ad2d1bc9b9730fb7254a78efd71a8ff46b1938ff468e47a21b653a1b6725_
-
-[direct-scrcpy-server]: https://github.com/Genymobile/scrcpy/releases/download/v1.17/scrcpy-server-v1.17
-
-Download the prebuilt server somewhere, and specify its path during the Meson
-configuration:
+### Uninstall
 
 ```bash
-meson x --buildtype release --strip -Db_lto=true \
-    -Dprebuilt_server=/path/to/scrcpy-server
-ninja -Cx
-sudo ninja -Cx install
+sudo ninja -Cx uninstall  # without sudo on Windows
 ```
-
-The server only works with a matching client version (this server works with the
-`master` branch).

DEVELOP.md

@@ -211,7 +211,7 @@ There are two [frames][video_buffer] simultaneously in memory:
  - the **rendering** frame, rendered in a texture from the main thread.
 
 When a new decoded frame is available, the decoder _swaps_ the decoding and
-rendering frame (with proper synchronization). Thus, it immediatly starts
+rendering frame (with proper synchronization). Thus, it immediately starts
 to decode a new frame while the main thread renders the last one.
 
 If a [recorder] is present (i.e. `--record` is enabled), then it muxes the raw

FAQ.it.md

@@ -0,0 +1,217 @@
+_Apri le [FAQ](FAQ.md) originali e sempre aggiornate._
+
+# Domande Frequenti (FAQ)
+
+Questi sono i problemi più comuni riportati e i loro stati.
+
+
+## Problemi di `adb`
+
+`scrcpy` esegue comandi `adb` per inizializzare la connessione con il dispositivo. Se `adb` fallisce, scrcpy non funzionerà.
+
+In questo caso sarà stampato questo errore:
+
+>     ERROR: "adb push" returned with value 1
+
+Questo solitamente non è un bug di _scrcpy_, ma un problema del tuo ambiente.
+
+Per trovare la causa, esegui:
+
+```bash
+adb devices
+```
+
+### `adb` not found (`adb` non trovato)
+
+È necessario che `adb` sia accessibile dal tuo `PATH`.
+
+In Windows, la cartella corrente è nel tuo `PATH` e `adb.exe` è incluso nella release, perciò dovrebbe già essere pronto all'uso.
+
+
+### Device unauthorized (Dispositivo non autorizzato)
+
+Controlla [stackoverflow][device-unauthorized] (in inglese).
+
+[device-unauthorized]: https://stackoverflow.com/questions/23081263/adb-android-device-unauthorized
+
+
+### Device not detected (Dispositivo non rilevato)
+
+>     adb: error: failed to get feature set: no devices/emulators found
+
+Controlla di aver abilitato correttamente il [debug con adb][enable-adb] (link in inglese).
+
+Se il tuo dispositivo non è rilevato, potresti avere bisogno dei [driver][drivers] (link in inglese) (in Windows).
+
+[enable-adb]: https://developer.android.com/studio/command-line/adb.html#Enabling
+[drivers]: https://developer.android.com/studio/run/oem-usb.html
+
+
+### Più dispositivi connessi
+
+Se più dispositivi sono connessi, riscontrerai questo errore:
+
+>     adb: error: failed to get feature set: more than one device/emulator
+
+l'identificatore del tuo dispositivo deve essere fornito:
+
+```bash
+scrcpy -s 01234567890abcdef
+```
+
+Notare che se il tuo dispositivo è connesso mediante TCP/IP, riscontrerai questo messaggio:
+
+>     adb: error: more than one device/emulator
+>     ERROR: "adb reverse" returned with value 1
+>     WARN: 'adb reverse' failed, fallback to 'adb forward'
+
+Questo è un problema atteso (a causa di un bug di una vecchia versione di Android, vedi [#5] (link in inglese)), ma in quel caso scrcpy ripiega su un metodo differente, il quale dovrebbe funzionare.
+
+[#5]: https://github.com/Genymobile/scrcpy/issues/5
+
+
+### Conflitti tra versioni di adb
+
+>     adb server version (41) doesn't match this client (39); killing...
+
+L'errore compare quando usi più versioni di `adb` simultaneamente. Devi trovare il programma che sta utilizzando una versione differente di `adb` e utilizzare la stessa versione dappertutto.
+
+Puoi sovrascrivere i binari di `adb` nell'altro programma, oppure chiedere a _scrcpy_ di usare un binario specifico di `adb`, impostando la variabile d'ambiente `ADB`:
+
+```bash
+set ADB=/path/to/your/adb
+scrcpy
+```
+
+
+### Device disconnected (Dispositivo disconnesso)
+
+Se _scrcpy_ si interrompe con l'avviso "Device disconnected", allora la connessione `adb` è stata chiusa.
+
+Prova con un altro cavo USB o inseriscilo in un'altra porta USB. Vedi [#281] (in inglese) e [#283] (in inglese).
+
+[#281]: https://github.com/Genymobile/scrcpy/issues/281
+[#283]: https://github.com/Genymobile/scrcpy/issues/283
+
+
+
+## Problemi di controllo
+
+### Mouse e tastiera non funzionano
+
+Su alcuni dispositivi potresti dover abilitare un opzione che permette l'[input simulato][simulating input] (link in inglese). Nelle opzioni sviluppatore, abilita:
+
+> **Debug USB (Impostazioni di sicurezza)**
+> _Permetti la concessione dei permessi e la simulazione degli input mediante il debug USB_
+<!--- Ho tradotto personalmente il testo sopra, non conosco esattamente il testo reale --->
+
+[simulating input]: https://github.com/Genymobile/scrcpy/issues/70#issuecomment-373286323
+
+
+### I caratteri speciali non funzionano
+
+Iniettare del testo in input è [limitato ai caratteri ASCII][text-input] (link in inglese). Un trucco permette di iniettare dei [caratteri accentati][accented-characters] (link in inglese), ma questo è tutto. Vedi [#37] (link in inglese).
+
+[text-input]: https://github.com/Genymobile/scrcpy/issues?q=is%3Aopen+is%3Aissue+label%3Aunicode
+[accented-characters]: https://blog.rom1v.com/2018/03/introducing-scrcpy/#handle-accented-characters
+[#37]: https://github.com/Genymobile/scrcpy/issues/37
+
+
+## Problemi del client
+
+### La qualità è bassa
+
+Se la definizione della finestra del tuo client è minore di quella del tuo dispositivo, allora potresti avere una bassa qualità di visualizzazione, specialmente individuabile nei testi (vedi [#40] (link in inglese)).
+
+[#40]: https://github.com/Genymobile/scrcpy/issues/40
+
+Per migliorare la qualità di ridimensionamento (downscaling), il filtro trilineare è applicato automaticamente se il renderizzatore è OpenGL e se supporta la creazione di mipmap.
+
+In Windows, potresti voler forzare OpenGL:
+
+```
+scrcpy --render-driver=opengl
+```
+
+Potresti anche dover configurare il [comportamento di ridimensionamento][scaling behavior] (link in inglese):
+
+> `scrcpy.exe` > Propietà > Compatibilità > Modifica impostazioni DPI elevati > Esegui l'override del comportamento di ridimensionamento DPI elevati >  Ridimensionamento eseguito per:  _Applicazione_.
+
+[scaling behavior]: https://github.com/Genymobile/scrcpy/issues/40#issuecomment-424466723
+
+
+
+### Crash del compositore KWin
+
+In Plasma Desktop, il compositore è disabilitato mentre _scrcpy_ è in esecuzione.
+
+Come soluzione alternativa, [disattiva la "composizione dei blocchi"][kwin] (link in inglese).
+<!--- Non sono sicuro di aver tradotto correttamente la stringa di testo del pulsante --->
+
+[kwin]: https://github.com/Genymobile/scrcpy/issues/114#issuecomment-378778613
+
+
+## Crash
+
+### Eccezione
+
+Ci potrebbero essere molte ragioni. Una causa comune è che il codificatore hardware del tuo dispositivo non riesce a codificare alla definizione selezionata:
+
+> ```
+> ERROR: Exception on thread Thread[main,5,main]
+> android.media.MediaCodec$CodecException: Error 0xfffffc0e
+> ...
+> Exit due to uncaughtException in main thread:
+> ERROR: Could not open video stream
+> INFO: Initial texture: 1080x2336
+> ```
+
+o
+
+> ```
+> ERROR: Exception on thread Thread[main,5,main]
+> java.lang.IllegalStateException
+>         at android.media.MediaCodec.native_dequeueOutputBuffer(Native Method)
+> ```
+
+Prova con una definizione inferiore:
+
+```
+scrcpy -m 1920
+scrcpy -m 1024
+scrcpy -m 800
+```
+
+Potresti anche provare un altro [codificatore](README.it.md#codificatore).
+
+
+## Linea di comando in Windows
+
+Alcuni utenti Windows non sono familiari con la riga di comando. Qui è descritto come aprire un terminale ed eseguire `scrcpy` con gli argomenti:
+
+ 1. Premi <kbd>Windows</kbd>+<kbd>r</kbd>, questo apre una finestra di dialogo.
+ 2. Scrivi `cmd` e premi <kbd>Enter</kbd>, questo apre un terminale.
+ 3. Vai nella tua cartella di _scrcpy_ scrivendo (adatta il percorso):
+
+    ```bat
+    cd C:\Users\user\Downloads\scrcpy-win64-xxx
+    ```
+
+    e premi <kbd>Enter</kbd>
+ 4. Scrivi il tuo comando. Per esempio:
+
+    ```bat
+    scrcpy --record file.mkv
+    ```
+
+Se pianifichi di utilizzare sempre gli stessi argomenti, crea un file `myscrcpy.bat` (abilita mostra [estensioni nomi file][show file extensions] per evitare di far confusione) contenente il tuo comando nella cartella di `scrcpy`. Per esempio:
+
+```bat
+scrcpy --prefer-text --turn-screen-off --stay-awake
+```
+
+Poi fai doppio click su quel file.
+
+Potresti anche modificare (una copia di) `scrcpy-console.bat` o `scrcpy-noconsole.vbs` per aggiungere alcuni argomenti.
+
+[show file extensions]: https://www.techpedia.it/14-windows/windows-10/171-visualizzare-le-estensioni-nomi-file-con-windows-10

FAQ.md

@@ -1,5 +1,7 @@
 # Frequently Asked Questions
 
+[Read in another language](#translations)
+
 Here are the common reported problems and their status.
 
 
@@ -39,8 +41,11 @@ Check [stackoverflow][device-unauthorized].
 
 >     adb: error: failed to get feature set: no devices/emulators found
 
+Check that you correctly enabled [adb debugging][enable-adb].
+
 If your device is not detected, you may need some [drivers] (on Windows).
 
+[enable-adb]: https://developer.android.com/studio/command-line/adb.html#Enabling
 [drivers]: https://developer.android.com/studio/run/oem-usb.html
 
 
@@ -111,16 +116,6 @@ In developer options, enable:
 [simulating input]: https://github.com/Genymobile/scrcpy/issues/70#issuecomment-373286323
 
 
-### Mouse clicks at wrong location
-
-On MacOS, with HiDPI support and multiple screens, input location are wrongly
-scaled. See [#15].
-
-[#15]: https://github.com/Genymobile/scrcpy/issues/15
-
-Open _scrcpy_ directly on the monitor you use it.
-
-
 ### Special characters do not work
 
 Injecting text input is [limited to ASCII characters][text-input]. A trick
@@ -237,3 +232,11 @@ You could also edit (a copy of) `scrcpy-console.bat` or `scrcpy-noconsole.vbs`
 to add some arguments.
 
 [show file extensions]: https://www.howtogeek.com/205086/beginner-how-to-make-windows-show-file-extensions/
+
+
+## Translations
+
+This FAQ is available in other languages:
+
+ - [Italiano (Italiano, `it`) - v1.17](FAQ.it.md)
+ - [한국어 (Korean, `ko`) - v1.11](FAQ.ko.md)

README.id.md

@@ -69,10 +69,7 @@ Anda juga bisa [membangun aplikasi secara manual][BUILD] (jangan khawatir, tidak
 
 Untuk Windows, untuk kesederhanaan, arsip prebuilt dengan semua dependensi (termasuk `adb`) tersedia :
 
- - [`scrcpy-win64-v1.16.zip`][direct-win64]  
-   _(SHA-256: 3f30dc5db1a2f95c2b40a0f5de91ec1642d9f53799250a8c529bc882bc0918f0)_
-
-[direct-win64]: https://github.com/Genymobile/scrcpy/releases/download/v1.16/scrcpy-win64-v1.16.zip
+ - [README](README.md#windows)
 
 Ini juga tersedia di [Chocolatey]:
 

README.it.md

@@ -0,0 +1,742 @@
+_Apri il [README](README.md) originale e sempre aggiornato._
+
+# scrcpy (v1.17)
+
+Questa applicazione fornisce la visualizzazione e il controllo dei dispositivi Android collegati via USB (o [via TCP/IP][article-tcpip]). Non richiede alcun accesso _root_.
+Funziona su _GNU/Linux_, _Windows_ e _macOS_.
+
+![screenshot](assets/screenshot-debian-600.jpg)
+
+Si concentra su:
+
+ - **leggerezza** (nativo, mostra solo lo schermo del dispositivo)
+ - **prestazioni** (30~60fps)
+ - **qualità** (1920×1080 o superiore)
+ - **bassa latenza** ([35~70ms][lowlatency])
+ - **tempo di avvio basso** (~ 1secondo per visualizzare la prima immagine)
+ - **non invadenza** (nulla viene lasciato installato sul dispositivo)
+
+[lowlatency]: https://github.com/Genymobile/scrcpy/pull/646
+
+
+## Requisiti
+
+Il dispositivo Android richiede almeno le API 21 (Android 5.0).
+
+Assiucurati di aver [attivato il debug usb][enable-adb] sul(/i) tuo(i) dispositivo(/i).
+
+[enable-adb]: https://developer.android.com/studio/command-line/adb.html#Enabling
+
+In alcuni dispositivi, devi anche abilitare [un'opzione aggiuntiva][control] per controllarli con tastiera e mouse.
+
+[control]: https://github.com/Genymobile/scrcpy/issues/70#issuecomment-373286323
+
+## Ottieni l'app
+
+<a href="https://repology.org/project/scrcpy/versions"><img src="https://repology.org/badge/vertical-allrepos/scrcpy.svg" alt="Packaging status" align="right"></a>
+
+### Sommario
+
+ - Linux: `apt install scrcpy`
+ - Windows: [download](README.md#windows)
+ - macOS: `brew install scrcpy`
+
+Compila dai sorgenti: [BUILD] (in inglese) ([procedimento semplificato][BUILD_simple] (in inglese))
+
+[BUILD]: BUILD.md
+[BUILD_simple]: BUILD.md#simple
+
+
+### Linux
+
+Su Debian (_testing_ e _sid_ per ora) e Ubuntu (20.04):
+
+```
+apt install scrcpy
+```
+
+È disponibile anche un pacchetto [Snap]: [`scrcpy`][snap-link].
+
+[snap-link]: https://snapstats.org/snaps/scrcpy
+
+[snap]: https://it.wikipedia.org/wiki/Snappy_(gestore_pacchetti)
+
+Per Fedora, è disponibile un pacchetto [COPR]: [`scrcpy`][copr-link].
+
+[COPR]: https://fedoraproject.org/wiki/Category:Copr
+[copr-link]: https://copr.fedorainfracloud.org/coprs/zeno/scrcpy/
+
+Per Arch Linux, è disponibile un pacchetto [AUR]: [`scrcpy`][aur-link].
+
+[AUR]: https://wiki.archlinux.org/index.php/Arch_User_Repository
+[aur-link]: https://aur.archlinux.org/packages/scrcpy/
+
+Per Gentoo, è disponibile una [Ebuild]: [`scrcpy/`][ebuild-link].
+
+[Ebuild]: https://wiki.gentoo.org/wiki/Ebuild
+[ebuild-link]: https://github.com/maggu2810/maggu2810-overlay/tree/master/app-mobilephone/scrcpy
+
+Puoi anche [compilare l'app manualmente][BUILD] (in inglese) ([procedimento semplificato][BUILD_simple] (in inglese)).
+
+
+### Windows
+
+Per Windows, per semplicità è disponibile un archivio precompilato con tutte le dipendenze (incluso `adb`):
+
+ - [README](README.md#windows) (Link al README originale per l'ultima versione)
+
+È anche disponibile in [Chocolatey]:
+
+[Chocolatey]: https://chocolatey.org/
+
+```bash
+choco install scrcpy
+choco install adb    # se non lo hai già
+```
+
+E in [Scoop]:
+
+```bash
+scoop install scrcpy
+scoop install adb    # se non lo hai già
+```
+
+[Scoop]: https://scoop.sh
+
+Puoi anche [compilare l'app manualmente][BUILD] (in inglese).
+
+
+### macOS
+
+L'applicazione è disponibile in [Homebrew]. Basta installarlo:
+
+[Homebrew]: https://brew.sh/
+
+```bash
+brew install scrcpy
+```
+
+Serve che `adb` sia accessibile dal tuo `PATH`. Se non lo hai già:
+
+```bash
+brew install android-platform-tools
+```
+
+È anche disponibile in [MacPorts], che imposta adb per te:
+
+```bash
+sudo port install scrcpy
+```
+
+[MacPorts]: https://www.macports.org/
+
+
+Puoi anche [compilare l'app manualmente][BUILD] (in inglese).
+
+
+## Esecuzione
+
+Collega un dispositivo Android ed esegui:
+
+```bash
+scrcpy
+```
+
+Scrcpy accetta argomenti da riga di comando, essi sono listati con:
+
+```bash
+scrcpy --help
+```
+
+## Funzionalità
+
+### Configurazione di acquisizione
+
+#### Riduci dimensione
+
+Qualche volta è utile trasmettere un dispositvo Android ad una definizione inferiore per aumentare le prestazioni.
+
+Per limitare sia larghezza che altezza ad un certo valore (ad es. 1024):
+
+```bash
+scrcpy --max-size 1024
+scrcpy -m 1024  # versione breve
+```
+
+L'altra dimensione è calcolata in modo tale che il rapporto di forma del dispositivo sia preservato.
+In questo esempio un dispositivo in 1920x1080 viene trasmesso a 1024x576.
+
+
+#### Cambia bit-rate (velocità di trasmissione)
+
+Il bit-rate predefinito è 8 Mbps. Per cambiare il bitrate video (ad es. a 2 Mbps):
+
+```bash
+scrcpy --bit-rate 2M
+scrcpy -b 2M  # versione breve
+```
+
+#### Limitare il frame rate (frequenza di fotogrammi)
+
+Il frame rate di acquisizione può essere limitato:
+
+```bash
+scrcpy --max-fps 15
+```
+
+Questo è supportato ufficialmente a partire da Android 10, ma potrebbe funzionare in versioni precedenti.
+
+#### Ritaglio
+
+Lo schermo del dispositivo può essere ritagliato per visualizzare solo parte di esso.
+
+Questo può essere utile, per esempio, per trasmettere solo un occhio dell'Oculus Go:
+
+```bash
+scrcpy --crop 1224:1440:0:0   # 1224x1440 at offset (0,0)
+```
+
+Se anche `--max-size` è specificata, il ridimensionamento è applicato dopo il ritaglio.
+
+
+#### Blocca orientamento del video
+
+
+Per bloccare l'orientamento della trasmissione:
+
+```bash
+scrcpy --lock-video-orientation 0   # orientamento naturale
+scrcpy --lock-video-orientation 1   # 90° antiorario
+scrcpy --lock-video-orientation 2   # 180°
+scrcpy --lock-video-orientation 3   # 90° orario
+```
+
+Questo influisce sull'orientamento della registrazione.
+
+
+La [finestra può anche essere ruotata](#rotazione) indipendentemente.
+
+
+#### Codificatore
+
+Alcuni dispositivi hanno più di un codificatore e alcuni di questi possono provocare problemi o crash. È possibile selezionare un encoder diverso:
+
+```bash
+scrcpy --encoder OMX.qcom.video.encoder.avc
+```
+
+Per elencare i codificatori disponibili puoi immettere un nome di codificatore non valido e l'errore mostrerà i codificatori disponibili:
+
+```bash
+scrcpy --encoder _
+```
+
+### Registrazione
+
+È possibile registrare lo schermo durante la trasmissione:
+
+```bash
+scrcpy --record file.mp4
+scrcpy -r file.mkv
+```
+
+Per disabilitare la trasmissione durante la registrazione:
+
+```bash
+scrcpy --no-display --record file.mp4
+scrcpy -Nr file.mkv
+# interrompere la registrazione con Ctrl+C
+```
+
+I "fotogrammi saltati" sono registrati nonostante non siano mostrati in tempo reale (per motivi di prestazioni). I fotogrammi sono _datati_ sul dispositivo, così una [variazione di latenza dei pacchetti][packet delay variation] non impatta il file registrato.
+
+[packet delay variation]: https://en.wikipedia.org/wiki/Packet_delay_variation
+
+
+### Connessione
+
+#### Wireless
+
+
+_Scrcpy_ usa `adb` per comunicare col dispositivo e `adb` può [connettersi][connect] al dispositivo mediante TCP/IP:
+
+1. Connetti il dispositivo alla stessa rete Wi-Fi del tuo computer.
+2. Trova l'indirizzo IP del tuo dispositivo in Impostazioni → Informazioni sul telefono → Stato, oppure   eseguendo questo comando:
+
+    ```bash
+    adb shell ip route | awk '{print $9}'
+    ```
+
+3. Abilita adb via TCP/IP sul tuo dispositivo: `adb tcpip 5555`.
+4. Scollega il tuo dispositivo.
+5. Connetti il tuo dispositivo: `adb connect IP_DISPOSITVO:5555` _(rimpiazza `IP_DISPOSITIVO`)_.
+6. Esegui `scrcpy` come al solito.
+
+Potrebbe essere utile diminuire il bit-rate e la definizione
+
+```bash
+scrcpy --bit-rate 2M --max-size 800
+scrcpy -b2M -m800  # versione breve
+```
+
+[connect]: https://developer.android.com/studio/command-line/adb.html#wireless
+
+
+#### Multi dispositivo
+
+Se in `adb devices` sono listati più dispositivi, è necessario specificare il _seriale_:
+
+```bash
+scrcpy --serial 0123456789abcdef
+scrcpy -s 0123456789abcdef  # versione breve
+```
+
+Se il dispositivo è collegato mediante TCP/IP:
+
+```bash
+scrcpy --serial 192.168.0.1:5555
+scrcpy -s 192.168.0.1:5555  # versione breve
+```
+
+Puoi avviare più istanze di _scrcpy_ per diversi dispositivi.
+
+
+#### Avvio automativo alla connessione del dispositivo
+
+Potresti usare [AutoAdb]:
+
+```bash
+autoadb scrcpy -s '{}'
+```
+
+[AutoAdb]: https://github.com/rom1v/autoadb
+
+#### Tunnel SSH
+
+Per connettersi a un dispositivo remoto è possibile collegare un client `adb` locale ad un server `adb` remoto (assunto che entrambi stiano usando la stessa versione del protocollo _adb_):
+
+```bash
+adb kill-server    # termina il server adb locale su 5037
+ssh -CN -L5037:localhost:5037 -R27183:localhost:27183 your_remote_computer
+# tieni questo aperto
+```
+
+Da un altro terminale:
+
+```bash
+scrcpy
+```
+
+Per evitare l'abilitazione dell'apertura porte remota potresti invece forzare una "forward connection" (notare il `-L` invece di `-R`)
+
+```bash
+adb kill-server    # termina il server adb locale su 5037
+ssh -CN -L5037:localhost:5037 -L27183:localhost:27183 your_remote_computer
+# tieni questo aperto
+```
+
+Da un altro terminale:
+
+```bash
+scrcpy --force-adb-forward
+```
+
+
+Come per le connessioni wireless potrebbe essere utile ridurre la qualità:
+
+```
+scrcpy -b2M -m800 --max-fps 15
+```
+
+### Configurazione della finestra
+
+#### Titolo
+
+Il titolo della finestra è il modello del dispositivo per impostazione predefinita. Esso può essere cambiato:
+
+```bash
+scrcpy --window-title 'My device'
+```
+
+#### Posizione e dimensione
+
+La posizione e la dimensione iniziale della finestra può essere specificata:
+
+```bash
+scrcpy --window-x 100 --window-y 100 --window-width 800 --window-height 600
+```
+
+#### Senza bordi
+
+Per disabilitare le decorazioni della finestra:
+
+```bash
+scrcpy --window-borderless
+```
+
+#### Sempre in primo piano
+
+Per tenere scrcpy sempre in primo piano:
+
+```bash
+scrcpy --always-on-top
+```
+
+#### Schermo intero
+
+L'app può essere avviata direttamente a schermo intero:
+
+```bash
+scrcpy --fullscreen
+scrcpy -f  # versione breve
+```
+
+Lo schermo intero può anche essere attivato/disattivato con <kbd>MOD</kbd>+<kbd>f</kbd>.
+
+#### Rotazione
+
+La finestra può essere ruotata:
+
+```bash
+scrcpy --rotation 1
+```
+
+I valori possibili sono:
+ - `0`: nessuna rotazione
+ - `1`: 90 gradi antiorari
+ - `2`: 180 gradi
+ - `3`: 90 gradi orari
+
+La rotazione può anche essere cambiata dinamicamente con <kbd>MOD</kbd>+<kbd>←</kbd>
+_(sinistra)_ e <kbd>MOD</kbd>+<kbd>→</kbd> _(destra)_.
+
+Notare che _scrcpy_ gestisce 3 diversi tipi di rotazione:
+ - <kbd>MOD</kbd>+<kbd>r</kbd> richiede al dispositvo di cambiare tra orientamento verticale (portrait) e orizzontale (landscape) (l'app in uso potrebbe rifiutarsi se non supporta l'orientamento richiesto).
+ - [`--lock-video-orientation`](#blocca-orientamento-del-video) cambia l'orientamento della trasmissione (l'orientamento del video inviato dal dispositivo al computer). Questo influenza la registrazione.
+ - `--rotation` (o <kbd>MOD</kbd>+<kbd>←</kbd>/<kbd>MOD</kbd>+<kbd>→</kbd>) ruota solo il contenuto della finestra. Questo influenza solo la visualizzazione, non la registrazione.
+
+
+### Altre opzioni di trasmissione
+
+#### "Sola lettura"
+
+Per disabilitare i controlli (tutto ciò che può interagire col dispositivo: tasti di input, eventi del mouse, trascina e rilascia (drag&drop) file):
+
+```bash
+scrcpy --no-control
+scrcpy -n
+```
+
+#### Schermo
+
+Se sono disponibili più schermi, è possibile selezionare lo schermo da trasmettere:
+
+```bash
+scrcpy --display 1
+```
+
+La lista degli id schermo può essere ricavata da:
+
+```bash
+adb shell dumpsys display   # cerca "mDisplayId=" nell'output
+```
+
+Lo schermo secondario potrebbe essere possibile controllarlo solo se il dispositivo esegue almeno Android 10 (in caso contrario è trasmesso in modalità sola lettura).
+
+
+#### Mantenere sbloccato
+
+Per evitare che il dispositivo si blocchi dopo un po' che il dispositivo è collegato:
+
+```bash
+scrcpy --stay-awake
+scrcpy -w
+```
+
+Lo stato iniziale è ripristinato quando scrcpy viene chiuso.
+
+
+#### Spegnere lo schermo
+
+È possibile spegnere lo schermo del dispositivo durante la trasmissione con un'opzione da riga di comando:
+
+```bash
+scrcpy --turn-screen-off
+scrcpy -S
+```
+
+Oppure premendo <kbd>MOD</kbd>+<kbd>o</kbd> in qualsiasi momento.
+
+Per riaccenderlo premere <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>o</kbd>.
+
+In Android il pulsante `POWER` (tasto di accensione) accende sempre lo schermo. Per comodità, se `POWER` è inviato via scrcpy (con click destro o con <kbd>MOD</kbd>+<kbd>p</kbd>), si forza il dispositivo a spegnere lo schermo dopo un piccolo ritardo (appena possibile).
+Il pulsante fisico `POWER` continuerà ad accendere lo schermo normalmente.
+
+Può anche essere utile evitare il blocco del dispositivo:
+
+```bash
+scrcpy --turn-screen-off --stay-awake
+scrcpy -Sw
+```
+
+#### Renderizzare i fotogrammi scaduti
+
+Per minimizzare la latenza _scrcpy_ renderizza sempre l'ultimo fotogramma decodificato disponibile in maniera predefinita e tralascia quelli precedenti.
+
+Per forzare la renderizzazione di tutti i fotogrammi (a costo di una possibile latenza superiore), utilizzare:
+
+```bash
+scrcpy --render-expired-frames
+```
+
+#### Mostrare i tocchi
+
+Per le presentazioni può essere utile mostrare i tocchi fisici (sul dispositivo fisico).
+
+Android fornisce questa funzionalità nelle _Opzioni sviluppatore_.
+
+_Scrcpy_ fornisce un'opzione per abilitare questa funzionalità all'avvio e ripristinare il valore iniziale alla chiusura:
+
+```bash
+scrcpy --show-touches
+scrcpy -t
+```
+
+Notare che mostra solo i tocchi _fisici_ (con le dita sul dispositivo).
+
+
+#### Disabilitare il salvaschermo
+
+In maniera predefinita scrcpy non previene l'attivazione del salvaschermo del computer.
+
+Per disabilitarlo:
+
+```bash
+scrcpy --disable-screensaver
+```
+
+
+### Input di controlli
+
+#### Rotazione dello schermo del dispostivo
+
+Premere <kbd>MOD</kbd>+<kbd>r</kbd> per cambiare tra le modalità verticale (portrait) e orizzontale (landscape).
+
+Notare che la rotazione avviene solo se l'applicazione in primo piano supporta l'orientamento richiesto.
+
+#### Copia-incolla
+
+Quando gli appunti di Android cambiano, essi vengono automaticamente sincronizzati con gli appunti del computer.
+
+Qualsiasi scorciatoia <kbd>Ctrl</kbd> viene inoltrata al dispositivo. In particolare:
+ - <kbd>Ctrl</kbd>+<kbd>c</kbd> copia
+ - <kbd>Ctrl</kbd>+<kbd>x</kbd> taglia
+ - <kbd>Ctrl</kbd>+<kbd>v</kbd> incolla (dopo la sincronizzazione degli appunti da computer a dispositivo)
+
+Questo solitamente funziona nella maniera più comune.
+
+Il comportamento reale, però, dipende dall'applicazione attiva. Per esempio _Termux_ invia SIGINT con <kbd>Ctrl</kbd>+<kbd>c</kbd>, e _K-9 Mail_ compone un nuovo messaggio.
+
+Per copiare, tagliare e incollare in questi casi (ma è solo supportato in Android >= 7):
+ - <kbd>MOD</kbd>+<kbd>c</kbd> inietta `COPY`
+ - <kbd>MOD</kbd>+<kbd>x</kbd> inietta `CUT`
+ - <kbd>MOD</kbd>+<kbd>v</kbd> inietta `PASTE` (dopo la sincronizzazione degli appunti da computer a dispositivo)
+
+In aggiunta, <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd> permette l'iniezione del testo degli appunti del computer come una sequenza di eventi pressione dei tasti. Questo è utile quando il componente non accetta l'incollaggio di testo (per esempio in _Termux_), ma questo può rompere il contenuto non ASCII.
+
+**AVVISO:** Incollare gli appunti del computer nel dispositivo (sia con <kbd>Ctrl</kbd>+<kbd>v</kbd> che con <kbd>MOD</kbd>+<kbd>v</kbd>) copia il contenuto negli appunti del dispositivo. Come conseguenza, qualsiasi applicazione Android potrebbe leggere il suo contenuto. Dovresti evitare di incollare contenuti sensibili (come password) in questa maniera.
+
+Alcuni dispositivi non si comportano come aspettato quando si modificano gli appunti del dispositivo a livello di codice. L'opzione `--legacy-paste` è fornita per cambiare il comportamento di <kbd>Ctrl</kbd>+<kbd>v</kbd> and <kbd>MOD</kbd>+<kbd>v</kbd> in modo tale che anch'essi iniettino il testo gli appunti del computer come una sequenza di eventi pressione dei tasti (nella stessa maniera di <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd>).
+
+#### Pizzica per zoomare (pinch-to-zoom)
+
+Per simulare il "pizzica per zoomare": <kbd>Ctrl</kbd>+_click e trascina_.
+
+Più precisamente, tieni premuto <kbd>Ctrl</kbd> mentre premi il pulsante sinistro. Finchè il pulsante non sarà rilasciato, tutti i movimenti del mouse ridimensioneranno e ruoteranno il contenuto (se supportato dall'applicazione) relativamente al centro dello schermo.
+
+Concretamente scrcpy genera degli eventi di tocco addizionali di un "dito virtuale" nella posizione simmetricamente opposta rispetto al centro dello schermo.
+
+
+#### Preferenze di iniezione del testo
+
+Ci sono due tipi di [eventi][textevents] generati quando si scrive testo:
+ - _eventi di pressione_, segnalano che tasto è stato premuto o rilasciato;
+ - _eventi di testo_, segnalano che del testo è stato inserito.
+
+In maniera predefinita le lettere sono "iniettate" usando gli eventi di pressione, in maniera tale che la tastiera si comporti come aspettato nei giochi (come accade solitamente per i tasti WASD).
+
+Questo, però, può [causare problemi][prefertext]. Se incontri un problema del genere, puoi evitarlo con:
+
+```bash
+scrcpy --prefer-text
+```
+
+(ma questo romperà il normale funzionamento della tastiera nei giochi)
+
+[textevents]: https://blog.rom1v.com/2018/03/introducing-scrcpy/#handle-text-input
+[prefertext]: https://github.com/Genymobile/scrcpy/issues/650#issuecomment-512945343
+
+
+#### Ripetizione di tasti
+
+In maniera predefinita tenere premuto un tasto genera una ripetizione degli eventi di pressione di tale tasto. Questo può creare problemi di performance in alcuni giochi, dove questi eventi sono inutilizzati.
+
+Per prevenire l'inoltro ripetuto degli eventi di pressione:
+
+```bash
+scrcpy --no-key-repeat
+```
+
+#### Click destro e click centrale
+
+In maniera predefinita, click destro aziona BACK (indietro) e il click centrale aziona HOME. Per disabilitare queste scorciatoie e, invece, inviare i click al dispositivo:
+
+```bash
+scrcpy --forward-all-clicks
+```
+
+
+### Rilascio di file
+
+#### Installare APK
+
+Per installare un APK, trascina e rilascia un file APK (finisce con `.apk`) nella finestra di _scrcpy_.
+
+Non c'è alcuna risposta visiva, un log è stampato nella console.
+
+
+#### Trasferimento di file verso il dispositivo
+
+Per trasferire un file in `/sdcard/` del dispositivo trascina e rilascia un file (non APK) nella finestra di _scrcpy_.
+
+Non c'è alcuna risposta visiva, un log è stampato nella console.
+
+La cartella di destinazione può essere cambiata all'avvio:
+
+```bash
+scrcpy --push-target=/sdcard/Download/
+```
+
+
+### Inoltro dell'audio
+
+L'audio non è inoltrato da _scrcpy_. Usa [sndcpy].
+
+Vedi anche la [issue #14].
+
+[sndcpy]: https://github.com/rom1v/sndcpy
+[issue #14]: https://github.com/Genymobile/scrcpy/issues/14
+
+
+## Scociatoie
+
+Nella lista seguente, <kbd>MOD</kbd> è il modificatore delle scorciatoie. In maniera predefinita è <kbd>Alt</kbd> (sinistro) o <kbd>Super</kbd> (sinistro).
+
+Può essere cambiato usando `--shortcut-mod`. I tasti possibili sono `lctrl`, `rctrl`, `lalt`, `ralt`, `lsuper` and `rsuper` (`l` significa sinistro e `r` significa destro). Per esempio:
+
+```bash
+# usa ctrl destro per le scorciatoie
+scrcpy --shortcut-mod=rctrl
+
+# use sia "ctrl sinistro"+"alt sinistro" che "super sinistro" per le scorciatoie
+scrcpy --shortcut-mod=lctrl+lalt,lsuper
+```
+
+_<kbd>[Super]</kbd> è il pulsante <kbd>Windows</kbd> o <kbd>Cmd</kbd>._
+
+[Super]: https://it.wikipedia.org/wiki/Tasto_Windows
+<!-- https://en.wikipedia.org/wiki/Super_key_(keyboard_button) è la pagina originale di Wikipedia inglese, l'ho sostituita con una simile in quello italiano -->
+
+ | Azione                                      |   Scorciatoia
+ | ------------------------------------------- |:-----------------------------
+ | Schermo intero                      | <kbd>MOD</kbd>+<kbd>f</kbd>
+ | Rotazione schermo a sinistra                         | <kbd>MOD</kbd>+<kbd>←</kbd> _(sinistra)_
+ | Rotazione schermo a destra                        | <kbd>MOD</kbd>+<kbd>→</kbd> _(destra)_
+ | Ridimensiona finestra a 1:1 (pixel-perfect)        | <kbd>MOD</kbd>+<kbd>g</kbd>
+ | Ridimensiona la finestra per rimuovere i bordi neri       | <kbd>MOD</kbd>+<kbd>w</kbd> \| _Doppio click¹_
+ | Premi il tasto `HOME`                             | <kbd>MOD</kbd>+<kbd>h</kbd> \| _Click centrale_
+ | Premi il tasto `BACK`                             | <kbd>MOD</kbd>+<kbd>b</kbd> \| _Click destro²_
+ | Premi il tasto `APP_SWITCH`                       | <kbd>MOD</kbd>+<kbd>s</kbd>
+ | Premi il tasto `MENU` (sblocca lo schermo)             | <kbd>MOD</kbd>+<kbd>m</kbd>
+ | Premi il tasto `VOLUME_UP`                        | <kbd>MOD</kbd>+<kbd>↑</kbd> _(su)_
+ | Premi il tasto `VOLUME_DOWN`                      | <kbd>MOD</kbd>+<kbd>↓</kbd> _(giù)_
+ | Premi il tasto `POWER`                            | <kbd>MOD</kbd>+<kbd>p</kbd>
+ | Accendi                                    | _Click destro²_
+ | Spegni lo schermo del dispositivo (continua a trasmettere)     | <kbd>MOD</kbd>+<kbd>o</kbd>
+ | Accendi lo schermo del dispositivo                       | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>o</kbd>
+ | Ruota lo schermo del dispositivo                        | <kbd>MOD</kbd>+<kbd>r</kbd>
+ | Espandi il pannello delle notifiche                   | <kbd>MOD</kbd>+<kbd>n</kbd>
+ | Chiudi il pannello delle notifiche                 | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>n</kbd>
+ | Copia negli appunti³                          | <kbd>MOD</kbd>+<kbd>c</kbd>
+ | Taglia negli appunti³                           | <kbd>MOD</kbd>+<kbd>x</kbd>
+ | Sincronizza gli appunti e incolla³           | <kbd>MOD</kbd>+<kbd>v</kbd>
+ | Inietta il testo degli appunti del computer              | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd>
+ | Abilita/Disabilita il contatore FPS (su stdout)      | <kbd>MOD</kbd>+<kbd>i</kbd>
+ | Pizzica per zoomare                               | <kbd>Ctrl</kbd>+_click e trascina_
+
+_¹Doppio click sui bordi neri per rimuoverli._  
+_²Il tasto destro accende lo schermo se era spento, preme BACK in caso contrario._  
+_³Solo in Android >= 7._
+
+Tutte le scorciatoie <kbd>Ctrl</kbd>+_tasto_ sono inoltrate al dispositivo, così sono gestite dall'applicazione attiva.
+
+## Path personalizzati
+
+Per utilizzare dei binari _adb_ specifici, configura il suo path nella variabile d'ambente `ADB`:
+
+```bash
+ADB=/percorso/per/adb scrcpy
+```
+
+Per sovrascrivere il percorso del file `scrcpy-server`, configura il percorso in `SCRCPY_SERVER_PATH`.
+
+## Perchè _scrcpy_?
+
+Un collega mi ha sfidato a trovare un nome tanto impronunciabile quanto [gnirehtet].
+
+[`strcpy`] copia una **str**ing (stringa); `scrcpy` copia uno **scr**een (schermo).
+
+[gnirehtet]: https://github.com/Genymobile/gnirehtet
+[`strcpy`]: http://man7.org/linux/man-pages/man3/strcpy.3.html
+
+## Come compilare?
+
+Vedi [BUILD] (in inglese).
+
+
+## Problemi comuni
+
+Vedi le [FAQ](FAQ.it.md).
+
+
+## Sviluppatori
+
+Leggi la [pagina per sviluppatori].
+
+[pagina per sviluppatori]: DEVELOP.md
+
+
+## Licenza (in inglese)
+
+    Copyright (C) 2018 Genymobile
+    Copyright (C) 2018-2021 Romain Vimont
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+
+## Articoli (in inglese)
+
+- [Introducendo scrcpy][article-intro]
+- [Scrcpy ora funziona wireless][article-tcpip]
+
+[article-intro]: https://blog.rom1v.com/2018/03/introducing-scrcpy/
+[article-tcpip]: https://www.genymotion.com/blog/open-source-project-scrcpy-now-works-wirelessly/

README.jp.md

@@ -0,0 +1,725 @@
+_Only the original [README](README.md) is guaranteed to be up-to-date._
+
+# scrcpy (v1.17)
+
+このアプリケーションはUSB(もしくは[TCP/IP経由][article-tcpip])で接続されたAndroidデバイスの表示と制御を提供します。このアプリケーションは _root_ でのアクセスを必要としません。このアプリケーションは _GNU/Linux_ 、 _Windows_ そして _macOS_ 上で動作します。
+
+![screenshot](assets/screenshot-debian-600.jpg)
+
+以下に焦点を当てています:
+
+ - **軽量** (ネイティブ、デバイス画面表示のみ)
+ - **パフォーマンス**　(30~60fps)
+ - **クオリティ**　(1920x1080以上)
+ - **低遅延**　([35~70ms][lowlatency])
+ - **短い起動時間**　(初回画像を1秒以内に表示)
+ - **非侵入型**　(デバイスに何もインストールされていない状態になる)
+
+[lowlatency]: https://github.com/Genymobile/scrcpy/pull/646
+
+
+## 必要要件
+
+AndroidデバイスはAPI21(Android 5.0)以上。
+
+Androidデバイスで[adbデバッグが有効][enable-adb]であること。
+
+[enable-adb]: https://developer.android.com/studio/command-line/adb.html#Enabling
+
+一部のAndroidデバイスでは、キーボードとマウスを使用して制御する[追加オプション][control]を有効にする必要がある。
+
+[control]: https://github.com/Genymobile/scrcpy/issues/70#issuecomment-373286323
+
+
+## アプリの取得
+
+<a href="https://repology.org/project/scrcpy/versions"><img src="https://repology.org/badge/vertical-allrepos/scrcpy.svg" alt="Packaging status" align="right"></a>
+
+### Linux
+
+Debian (_testing_ と _sid_) とUbuntu(20.04):
+
+```
+apt install scrcpy
+```
+
+[Snap]パッケージが利用可能: [`scrcpy`][snap-link]
+
+[snap-link]: https://snapstats.org/snaps/scrcpy
+
+[snap]: https://en.wikipedia.org/wiki/Snappy_(package_manager)
+
+Fedora用[COPR]パッケージが利用可能: [`scrcpy`][copr-link]
+
+[COPR]: https://fedoraproject.org/wiki/Category:Copr
+[copr-link]: https://copr.fedorainfracloud.org/coprs/zeno/scrcpy/
+
+Arch Linux用[AUR]パッケージが利用可能: [`scrcpy`][aur-link]
+
+[AUR]: https://wiki.archlinux.org/index.php/Arch_User_Repository
+[aur-link]: https://aur.archlinux.org/packages/scrcpy/
+
+Gentoo用[Ebuild]が利用可能: [`scrcpy`][ebuild-link]
+
+[Ebuild]: https://wiki.gentoo.org/wiki/Ebuild
+[ebuild-link]: https://github.com/maggu2810/maggu2810-overlay/tree/master/app-mobilephone/scrcpy
+
+[自分でビルド][BUILD]も可能（心配しないでください、それほど難しくはありません。）
+
+
+### Windows
+
+Windowsでは簡単に、（`adb`を含む）すべての依存関係を構築済みのアーカイブを利用可能です。
+
+ - [README](README.md#windows)
+
+[Chocolatey]でも利用可能です:
+
+[Chocolatey]: https://chocolatey.org/
+
+```bash
+choco install scrcpy
+choco install adb    # まだ入手していない場合
+```
+
+[Scoop]でも利用可能です:
+
+```bash
+scoop install scrcpy
+scoop install adb    # まだ入手していない場合
+```
+
+[Scoop]: https://scoop.sh
+
+また、[アプリケーションをビルド][BUILD]することも可能です。
+
+### macOS
+
+アプリケーションは[Homebrew]で利用可能です。ただインストールするだけです。
+
+[Homebrew]: https://brew.sh/
+
+```bash
+brew install scrcpy
+```
+
+`PATH`から`adb`へのアクセスが必要です。もしまだ持っていない場合:
+
+```bash
+# Homebrew >= 2.6.0
+brew install --cask android-platform-tools
+
+# Homebrew < 2.6.0
+brew cask install android-platform-tools
+```
+
+また、[アプリケーションをビルド][BUILD]することも可能です。
+
+
+## 実行
+
+Androidデバイスを接続し、実行:
+
+```bash
+scrcpy
+```
+
+次のコマンドでリストされるコマンドライン引数も受け付けます:
+
+```bash
+scrcpy --help
+```
+
+## 機能
+
+### キャプチャ構成
+
+#### サイズ削減
+
+Androidデバイスを低解像度でミラーリングする場合、パフォーマンス向上に便利な場合があります。
+
+幅と高さをある値(例：1024)に制限するには:
+
+```bash
+scrcpy --max-size 1024
+scrcpy -m 1024  # 短縮版
+```
+
+一方のサイズはデバイスのアスペクト比が維持されるように計算されます。この方法では、1920x1080のデバイスでは1024x576にミラーリングされます。
+
+
+#### ビットレート変更
+
+ビットレートの初期値は8Mbpsです。ビットレートを変更するには(例:2Mbpsに変更):
+
+```bash
+scrcpy --bit-rate 2M
+scrcpy -b 2M  # 短縮版
+```
+
+#### フレームレート制限
+
+キャプチャするフレームレートを制限できます:
+
+```bash
+scrcpy --max-fps 15
+```
+
+この機能はAndroid 10からオフィシャルサポートとなっていますが、以前のバージョンでも動作する可能性があります。
+
+#### トリミング
+
+デバイスの画面は、画面の一部のみをミラーリングするようにトリミングできます。
+
+これは、例えばOculus Goの片方の目をミラーリングする場合に便利です。:
+
+```bash
+scrcpy --crop 1224:1440:0:0   # オフセット位置(0,0)で1224x1440
+```
+
+もし`--max-size`も指定されている場合、トリミング後にサイズ変更が適用されます。
+
+#### ビデオの向きをロックする
+
+ミラーリングの向きをロックするには:
+
+```bash
+scrcpy --lock-video-orientation 0   # 自然な向き
+scrcpy --lock-video-orientation 1   # 90°反時計回り
+scrcpy --lock-video-orientation 2   # 180°
+scrcpy --lock-video-orientation 3   # 90°時計回り
+```
+
+この設定は録画の向きに影響します。
+
+[ウィンドウは独立して回転することもできます](#回転)。
+
+
+#### エンコーダ
+
+いくつかのデバイスでは一つ以上のエンコーダを持ちます。それらのいくつかは、問題やクラッシュを引き起こします。別のエンコーダを選択することが可能です:
+
+
+```bash
+scrcpy --encoder OMX.qcom.video.encoder.avc
+```
+
+利用可能なエンコーダをリストするために、無効なエンコーダ名を渡すことができます。エラー表示で利用可能なエンコーダを提供します。
+
+```bash
+scrcpy --encoder _
+```
+
+### 録画
+
+ミラーリング中に画面の録画をすることが可能です:
+
+```bash
+scrcpy --record file.mp4
+scrcpy -r file.mkv
+```
+
+録画中にミラーリングを無効にするには:
+
+```bash
+scrcpy --no-display --record file.mp4
+scrcpy -Nr file.mkv
+# Ctrl+Cで録画を中断する
+```
+
+"スキップされたフレーム"は(パフォーマンス上の理由で)リアルタイムで表示されなくても録画されます。
+
+フレームはデバイス上で _タイムスタンプされる_ ため [パケット遅延のバリエーション] は録画されたファイルに影響を与えません。
+
+[パケット遅延のバリエーション]: https://en.wikipedia.org/wiki/Packet_delay_variation
+
+
+### 接続
+
+#### ワイヤレス
+
+_Scrcpy_ はデバイスとの通信に`adb`を使用します。そして`adb`はTCP/IPを介しデバイスに[接続]することができます:
+
+1. あなたのコンピュータと同じWi-Fiに接続します。
+2. あなたのIPアドレスを取得します。設定 → 端末情報 → ステータス情報、もしくは、このコマンドを実行します:
+
+    ```bash
+    adb shell ip route | awk '{print $9}'
+    ```
+
+3. あなたのデバイスでTCP/IPを介したadbを有効にします: `adb tcpip 5555`
+4. あなたのデバイスの接続を外します。
+5. あなたのデバイスに接続します:
+ `adb connect DEVICE_IP:5555` _(`DEVICE_IP`は置き換える)_
+6. 通常通り`scrcpy`を実行します。
+
+この方法はビットレートと解像度を減らすのにおそらく有用です:
+
+```bash
+scrcpy --bit-rate 2M --max-size 800
+scrcpy -b2M -m800  # 短縮版
+```
+
+[接続]: https://developer.android.com/studio/command-line/adb.html#wireless
+
+
+#### マルチデバイス
+
+もし`adb devices`でいくつかのデバイスがリストされる場合、 _シリアルナンバー_ を指定する必要があります:
+
+```bash
+scrcpy --serial 0123456789abcdef
+scrcpy -s 0123456789abcdef  # 短縮版
+```
+
+デバイスがTCP/IPを介して接続されている場合:
+
+```bash
+scrcpy --serial 192.168.0.1:5555
+scrcpy -s 192.168.0.1:5555  # 短縮版
+```
+
+複数のデバイスに対して、複数の _scrcpy_ インスタンスを開始することができます。
+
+#### デバイス接続での自動起動
+
+[AutoAdb]を使用可能です:
+
+```bash
+autoadb scrcpy -s '{}'
+```
+
+[AutoAdb]: https://github.com/rom1v/autoadb
+
+#### SSHトンネル
+
+リモートデバイスに接続するため、ローカル`adb`クライアントからリモート`adb`サーバーへ接続することが可能です(同じバージョンの _adb_ プロトコルを使用している場合):
+
+```bash
+adb kill-server    # 5037ポートのローカルadbサーバーを終了する
+ssh -CN -L5037:localhost:5037 -R27183:localhost:27183 your_remote_computer
+# オープンしたままにする
+```
+
+他の端末から:
+
+```bash
+scrcpy
+```
+
+リモートポート転送の有効化を回避するためには、代わりに転送接続を強制することができます(`-R`の代わりに`-L`を使用することに注意):
+
+```bash
+adb kill-server    # 5037ポートのローカルadbサーバーを終了する
+ssh -CN -L5037:localhost:5037 -L27183:localhost:27183 your_remote_computer
+# オープンしたままにする
+```
+
+他の端末から:
+
+```bash
+scrcpy --force-adb-forward
+```
+
+
+ワイヤレス接続と同様に、クオリティを下げると便利な場合があります:
+
+```
+scrcpy -b2M -m800 --max-fps 15
+```
+
+### ウィンドウ構成
+
+#### タイトル
+
+ウィンドウのタイトルはデバイスモデルが初期値です。これは変更できます:
+
+```bash
+scrcpy --window-title 'My device'
+```
+
+#### 位置とサイズ
+
+ウィンドウの位置とサイズの初期値を指定できます:
+
+```bash
+scrcpy --window-x 100 --window-y 100 --window-width 800 --window-height 600
+```
+
+#### ボーダーレス
+
+ウィンドウの装飾を無効化するには:
+
+```bash
+scrcpy --window-borderless
+```
+
+#### 常に画面のトップ
+
+scrcpyの画面を常にトップにするには:
+
+```bash
+scrcpy --always-on-top
+```
+
+#### フルスクリーン
+
+アプリケーションを直接フルスクリーンで開始できます:
+
+```bash
+scrcpy --fullscreen
+scrcpy -f  # 短縮版
+```
+
+フルスクリーンは、次のコマンドで動的に切り替えることができます <kbd>MOD</kbd>+<kbd>f</kbd>
+
+
+#### 回転
+
+ウィンドウは回転することができます:
+
+```bash
+scrcpy --rotation 1
+```
+
+設定可能な値:
+ - `0`: 回転なし
+ - `1`: 90° 反時計回り
+ - `2`: 180°
+ - `3`: 90° 時計回り
+
+回転は次のコマンドで動的に変更することができます。 <kbd>MOD</kbd>+<kbd>←</kbd>_(左)_ 、 <kbd>MOD</kbd>+<kbd>→</kbd>_(右)_
+
+_scrcpy_ は3つの回転を管理することに注意:
+ - <kbd>MOD</kbd>+<kbd>r</kbd>はデバイスに縦向きと横向きの切り替えを要求する(現在実行中のアプリで要求している向きをサポートしていない場合、拒否することがある)
+ - [`--lock-video-orientation`](#ビデオの向きをロックする)は、ミラーリングする向きを変更する(デバイスからPCへ送信される向き)。録画に影響します。
+ - `--rotation` (もしくは<kbd>MOD</kbd>+<kbd>←</kbd>/<kbd>MOD</kbd>+<kbd>→</kbd>)は、ウィンドウのコンテンツのみを回転します。これは表示にのみに影響し、録画には影響しません。
+
+### 他のミラーリングオプション
+
+#### Read-only　リードオンリー
+
+制御を無効にするには(デバイスと対話する全てのもの:入力キー、マウスイベント、ファイルのドラッグ&ドロップ):
+
+```bash
+scrcpy --no-control
+scrcpy -n
+```
+
+#### ディスプレイ
+
+いくつか利用可能なディスプレイがある場合、ミラーリングするディスプレイを選択できます:
+
+```bash
+scrcpy --display 1
+```
+
+ディスプレイIDのリストは次の方法で取得できます:
+
+```
+adb shell dumpsys display   # search "mDisplayId=" in the output
+```
+
+セカンダリディスプレイは、デバイスが少なくともAndroid 10の場合にコントロール可能です。(それ以外ではリードオンリーでミラーリングされます)
+
+
+#### 起動状態にする
+
+デバイス接続時、少し遅れてからデバイスのスリープを防ぐには:
+
+```bash
+scrcpy --stay-awake
+scrcpy -w
+```
+
+scrcpyが閉じられた時、初期状態に復元されます。
+
+#### 画面OFF
+
+コマンドラインオプションを使用することで、ミラーリングの開始時にデバイスの画面をOFFにすることができます:
+
+```bash
+scrcpy --turn-screen-off
+scrcpy -S
+```
+
+もしくは、<kbd>MOD</kbd>+<kbd>o</kbd>を押すことでいつでもできます。
+
+元に戻すには、<kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>o</kbd>を押します。
+
+Androidでは、`POWER`ボタンはいつでも画面を表示します。便宜上、`POWER`がscrcpyを介して(右クリックもしくは<kbd>MOD</kbd>+<kbd>p</kbd>を介して)送信される場合、(ベストエフォートベースで)少し遅れて、強制的に画面を非表示にします。ただし、物理的な`POWER`ボタンを押した場合は、画面は表示されます。
+
+このオプションはデバイスがスリープしないようにすることにも役立ちます:
+
+```bash
+scrcpy --turn-screen-off --stay-awake
+scrcpy -Sw
+```
+
+
+#### 期限切れフレームをレンダリングする
+
+初期状態では、待ち時間を最小限にするために、_scrcpy_ は最後にデコードされたフレームをレンダリングし、前のフレームを削除します。
+
+全フレームのレンダリングを強制するには(待ち時間が長くなる可能性があります):
+
+```bash
+scrcpy --render-expired-frames
+```
+
+#### タッチを表示
+
+プレゼンテーションの場合(物理デバイス上で)物理的なタッチを表示すると便利な場合があります。
+
+Androidはこの機能を _開発者オプション_ で提供します。
+
+_Scrcpy_　は開始時にこの機能を有効にし、終了時に初期値を復元するオプションを提供します:
+
+```bash
+scrcpy --show-touches
+scrcpy -t
+```
+
+(デバイス上で指を使った) _物理的な_ タッチのみ表示されることに注意してください。
+
+
+#### スクリーンセーバー無効
+
+初期状態では、scrcpyはコンピュータ上でスクリーンセーバーが実行される事を妨げません。
+
+これを無効にするには:
+
+```bash
+scrcpy --disable-screensaver
+```
+
+
+### 入力制御
+
+#### デバイス画面の回転
+
+<kbd>MOD</kbd>+<kbd>r</kbd>を押すことで、縦向きと横向きを切り替えます。
+
+フォアグラウンドのアプリケーションが要求された向きをサポートしている場合のみ回転することに注意してください。
+
+#### コピー-ペースト
+
+Androidのクリップボードが変更される度に、コンピュータのクリップボードに自動的に同期されます。
+
+<kbd>Ctrl</kbd>のショートカットは全てデバイスに転送されます。特に:
+ - <kbd>Ctrl</kbd>+<kbd>c</kbd> 通常はコピーします
+ - <kbd>Ctrl</kbd>+<kbd>x</kbd> 通常はカットします
+ - <kbd>Ctrl</kbd>+<kbd>v</kbd> 通常はペーストします(コンピュータとデバイスのクリップボードが同期された後)
+
+通常は期待通りに動作します。
+
+しかしながら、実際の動作はアクティブなアプリケーションに依存します。例えば、_Termux_ は代わりに<kbd>Ctrl</kbd>+<kbd>c</kbd>でSIGINTを送信します、そして、_K-9 Mail_ は新しいメッセージを作成します。
+
+このようなケースでコピー、カットそしてペーストをするには(Android 7以上でのサポートのみですが):
+ - <kbd>MOD</kbd>+<kbd>c</kbd> `COPY`を挿入
+ - <kbd>MOD</kbd>+<kbd>x</kbd> `CUT`を挿入
+ - <kbd>MOD</kbd>+<kbd>v</kbd> `PASTE`を挿入(コンピュータとデバイスのクリップボードが同期された後)
+
+加えて、<kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd>はコンピュータのクリップボードテキストにキーイベントのシーケンスとして挿入することを許可します。これはコンポーネントがテキストのペーストを許可しない場合(例えば _Termux_)に有用ですが、非ASCIIコンテンツを壊す可能性があります。
+
+**警告:** デバイスにコンピュータのクリップボードを(<kbd>Ctrl</kbd>+<kbd>v</kbd>または<kbd>MOD</kbd>+<kbd>v</kbd>を介して)ペーストすることは、デバイスのクリップボードにコンテンツをコピーします。結果としてどのAndoridアプリケーションもそのコンテンツを読み取ることができます。機密性の高いコンテンツ(例えばパスワードなど)をこの方法でペーストすることは避けてください。
+
+プログラムでデバイスのクリップボードを設定した場合、一部のデバイスは期待どおりに動作しません。`--legacy-paste`オプションは、コンピュータのクリップボードテキストをキーイベントのシーケンスとして挿入するため(<kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd>と同じ方法)、<kbd>Ctrl</kbd>+<kbd>v</kbd>と<kbd>MOD</kbd>+<kbd>v</kbd>の動作の変更を提供します。
+
+#### ピンチしてズームする
+
+"ピンチしてズームする"をシミュレートするには: <kbd>Ctrl</kbd>+_クリック&移動_
+
+より正確にするには、左クリックボタンを押している間、<kbd>Ctrl</kbd>を押したままにします。左クリックボタンを離すまで、全てのマウスの動きは、(アプリでサポートされている場合)画面の中心を基準として、コンテンツを拡大縮小および回転します。
+
+具体的には、scrcpyは画面の中央を反転した位置にある"バーチャルフィンガー"から追加のタッチイベントを生成します。
+
+
+#### テキストインジェクション環境設定
+
+テキストをタイプした時に生成される2種類の[イベント][textevents]があります:
+ - _key events_　はキーを押したときと離したことを通知します。
+ - _text events_　はテキストが入力されたことを通知します。
+
+初期状態で、文字はキーイベントで挿入されるため、キーボードはゲームで期待通りに動作します(通常はWASDキー)。
+
+しかし、これは[問題を引き起こす][prefertext]かもしれません。もしこのような問題が発生した場合は、この方法で回避できます:
+
+```bash
+scrcpy --prefer-text
+```
+
+(しかしこの方法はゲームのキーボードの動作を壊します)
+
+[textevents]: https://blog.rom1v.com/2018/03/introducing-scrcpy/#handle-text-input
+[prefertext]: https://github.com/Genymobile/scrcpy/issues/650#issuecomment-512945343
+
+
+#### キーの繰り返し
+
+初期状態では、キーの押しっぱなしは繰り返しのキーイベントを生成します。これらのイベントが使われない場合でも、この方法は一部のゲームでパフォーマンスの問題を引き起す可能性があります。
+
+繰り返しのキーイベントの転送を回避するためには:
+
+```bash
+scrcpy --no-key-repeat
+```
+
+
+#### 右クリックと真ん中クリック
+
+初期状態では、右クリックはバックの動作(もしくはパワーオン)を起こし、真ん中クリックではホーム画面へ戻ります。このショートカットを無効にし、代わりにデバイスへクリックを転送するには:
+
+```bash
+scrcpy --forward-all-clicks
+```
+
+
+### ファイルのドロップ
+
+#### APKのインストール
+
+APKをインストールするには、(`.apk`で終わる)APKファイルを _scrcpy_ の画面にドラッグ&ドロップします。
+
+見た目のフィードバックはありません。コンソールにログが出力されます。
+
+
+#### デバイスにファイルを送る
+
+デバイスの`/sdcard/`ディレクトリにファイルを送るには、(APKではない)ファイルを _scrcpy_ の画面にドラッグ&ドロップします。
+
+見た目のフィードバックはありません。コンソールにログが出力されます。
+
+転送先ディレクトリを起動時に変更することができます:
+
+```bash
+scrcpy --push-target /sdcard/foo/bar/
+```
+
+
+### 音声転送
+
+音声は _scrcpy_ では転送されません。[sndcpy]を使用します。
+
+[issue #14]も参照ください。
+
+[sndcpy]: https://github.com/rom1v/sndcpy
+[issue #14]: https://github.com/Genymobile/scrcpy/issues/14
+
+
+## ショートカット
+
+次のリストでは、<kbd>MOD</kbd>でショートカット変更します。初期状態では、(left)<kbd>Alt</kbd>または(left)<kbd>Super</kbd>です。
+
+これは`--shortcut-mod`で変更することができます。可能なキーは`lctrl`、`rctrl`、`lalt`、 `ralt`、 `lsuper`そして`rsuper`です。例えば:
+
+```bash
+# RCtrlをショートカットとして使用します
+scrcpy --shortcut-mod=rctrl
+
+# ショートカットにLCtrl+LAltまたはLSuperのいずれかを使用します
+scrcpy --shortcut-mod=lctrl+lalt,lsuper
+```
+
+_<kbd>[Super]</kbd>は通常<kbd>Windows</kbd>もしくは<kbd>Cmd</kbd>キーです。_
+
+[Super]: https://en.wikipedia.org/wiki/Super_key_(keyboard_button)
+
+ | アクション                                   |   ショートカット
+ | ------------------------------------------- |:-----------------------------
+ | フルスクリーンモードへの切り替え               | <kbd>MOD</kbd>+<kbd>f</kbd>
+ | ディスプレイを左に回転                        | <kbd>MOD</kbd>+<kbd>←</kbd> _(左)_
+ | ディスプレイを右に回転                        | <kbd>MOD</kbd>+<kbd>→</kbd> _(右)_
+ | ウィンドウサイズを変更して1:1に変更(ピクセルパーフェクト)  | <kbd>MOD</kbd>+<kbd>g</kbd>
+ | ウィンドウサイズを変更して黒い境界線を削除      | <kbd>MOD</kbd>+<kbd>w</kbd> \| _ダブルクリック¹_
+ | `HOME`をクリック                             | <kbd>MOD</kbd>+<kbd>h</kbd> \| _真ん中クリック_
+ | `BACK`をクリック                             | <kbd>MOD</kbd>+<kbd>b</kbd> \| _右クリック²_
+ | `APP_SWITCH`をクリック                       | <kbd>MOD</kbd>+<kbd>s</kbd>
+ | `MENU` (画面のアンロック)をクリック            | <kbd>MOD</kbd>+<kbd>m</kbd>
+ | `VOLUME_UP`をクリック                        | <kbd>MOD</kbd>+<kbd>↑</kbd> _(上)_
+ | `VOLUME_DOWN`をクリック                      | <kbd>MOD</kbd>+<kbd>↓</kbd> _(下)_
+ | `POWER`をクリック                            | <kbd>MOD</kbd>+<kbd>p</kbd>
+ | 電源オン                                     | _右クリック²_
+ | デバイス画面をオフにする(ミラーリングしたまま)  | <kbd>MOD</kbd>+<kbd>o</kbd>
+ | デバイス画面をオンにする                      | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>o</kbd>
+ | デバイス画面を回転する                        | <kbd>MOD</kbd>+<kbd>r</kbd>
+ | 通知パネルを展開する                          | <kbd>MOD</kbd>+<kbd>n</kbd>
+ | 通知パネルを折りたたむ                        | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>n</kbd>
+ | クリップボードへのコピー³                     | <kbd>MOD</kbd>+<kbd>c</kbd>
+ | クリップボードへのカット³                     | <kbd>MOD</kbd>+<kbd>x</kbd>
+ | クリップボードの同期とペースト³                | <kbd>MOD</kbd>+<kbd>v</kbd>
+ | コンピュータのクリップボードテキストの挿入      | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd>
+ | FPSカウンタ有効/無効(標準入出力上)             | <kbd>MOD</kbd>+<kbd>i</kbd>
+ | ピンチしてズームする                          | <kbd>Ctrl</kbd>+_クリック&移動_
+
+_¹黒い境界線を削除するため、境界線上でダブルクリック_  
+_²もしスクリーンがオフの場合、右クリックでスクリーンをオンする。それ以外の場合はBackを押します._  
+_³Android 7以上のみ._
+
+全ての<kbd>Ctrl</kbd>+_キー_ ショートカットはデバイスに転送されます、そのためアクティブなアプリケーションによって処理されます。
+
+
+## カスタムパス
+
+特定の _adb_ バイナリを使用する場合、そのパスを環境変数`ADB`で構成します:
+
+    ADB=/path/to/adb scrcpy
+
+`scrcpy-server`ファイルのパスを上書きするには、`SCRCPY_SERVER_PATH`でそのパスを構成します。
+
+[useful]: https://github.com/Genymobile/scrcpy/issues/278#issuecomment-429330345
+
+
+## なぜ _scrcpy_?
+
+同僚が私に、[gnirehtet]のように発音できない名前を見つけるように要求しました。
+
+[`strcpy`]は**str**ingをコピーします。`scrcpy`は**scr**eenをコピーします。
+
+[gnirehtet]: https://github.com/Genymobile/gnirehtet
+[`strcpy`]: http://man7.org/linux/man-pages/man3/strcpy.3.html
+
+
+## ビルド方法は?
+
+[BUILD]を参照してください。
+
+[BUILD]: BUILD.md
+
+
+## よくある質問
+
+[FAQ](FAQ.md)を参照してください。
+
+
+## 開発者
+
+[開発者のページ]を読んでください。
+
+[開発者のページ]: DEVELOP.md
+
+
+## ライセンス
+
+    Copyright (C) 2018 Genymobile
+    Copyright (C) 2018-2021 Romain Vimont
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+
+## 記事
+
+- [Introducing scrcpy][article-intro]
+- [Scrcpy now works wirelessly][article-tcpip]
+
+[article-intro]: https://blog.rom1v.com/2018/03/introducing-scrcpy/
+[article-tcpip]: https://www.genymotion.com/blog/open-source-project-scrcpy-now-works-wirelessly/

README.ko.md

@@ -68,9 +68,7 @@ Gentoo에서 ,[Ebuild] 가 가능합니다 : [`scrcpy/`][ebuild-link].
 
 윈도우 상에서, 간단하게 설치하기 위해 종속성이 있는 사전 구축된 아카이브가 제공됩니다 (`adb` 포함) :
 해당 파일은 Readme원본 링크를 통해서 다운로드가 가능합니다.
- - [`scrcpy-win`][direct-win]
-
-[direct-win]: https://github.com/Genymobile/scrcpy/blob/master/README.md#windows
+ - [README](README.md#windows)
 
 
 [어플을 직접 설치][BUILD] 할 수도 있습니다.
@@ -114,7 +112,7 @@ scrcpy --help
 ### 캡쳐 환경 설정
 
 
-###사이즈 재정의
+### 사이즈 재정의
 
 가끔씩 성능을 향상시키기위해 안드로이드 디바이스를 낮은 해상도에서 미러링하는 것이 유용할 때도 있습니다.
 
@@ -138,7 +136,7 @@ scrcpy --bit-rate 2M
 scrcpy -b 2M  # 축약 버전
 ```
 
-###프레임 비율 제한
+### 프레임 비율 제한
 
 안드로이드 버전 10이상의 디바이스에서는, 다음의 명령어로 캡쳐 화면의 프레임 비율을 제한할 수 있습니다:
 

README.md

@@ -1,4 +1,4 @@
-# scrcpy (v1.17)
+# scrcpy (v1.18)
 
 [Read in another language](#translations)
 
@@ -38,6 +38,18 @@ control it using keyboard and mouse.
 
 <a href="https://repology.org/project/scrcpy/versions"><img src="https://repology.org/badge/vertical-allrepos/scrcpy.svg" alt="Packaging status" align="right"></a>
 
+### Summary
+
+ - Linux: `apt install scrcpy`
+ - Windows: [download][direct-win64]
+ - macOS: `brew install scrcpy`
+
+Build from sources: [BUILD] ([simplified process][BUILD_simple])
+
+[BUILD]: BUILD.md
+[BUILD_simple]: BUILD.md#simple
+
+
 ### Linux
 
 On Debian (_testing_ and _sid_ for now) and Ubuntu (20.04):
@@ -67,9 +79,8 @@ For Gentoo, an [Ebuild] is available: [`scrcpy/`][ebuild-link].
 [Ebuild]: https://wiki.gentoo.org/wiki/Ebuild
 [ebuild-link]: https://github.com/maggu2810/maggu2810-overlay/tree/master/app-mobilephone/scrcpy
 
-You could also [build the app manually][BUILD] (don't worry, it's not that
-hard).
-
+You could also [build the app manually][BUILD] ([simplified
+process][BUILD_simple]).
 
 
 ### Windows
@@ -77,10 +88,10 @@ hard).
 For Windows, for simplicity, a prebuilt archive with all the dependencies
 (including `adb`) is available:
 
- - [`scrcpy-win64-v1.17.zip`][direct-win64]  
-   _(SHA-256: 8b9e57993c707367ed10ebfe0e1ef563c7a29d9af4a355cd8b6a52a317c73eea)_
+ - [`scrcpy-win64-v1.18.zip`][direct-win64]  
+   _(SHA-256: 37212f5087fe6f3e258f1d44fa5c02207496b30e1d7ec442cbcf8358910a5c63)_
 
-[direct-win64]: https://github.com/Genymobile/scrcpy/releases/download/v1.17/scrcpy-win64-v1.17.zip
+[direct-win64]: https://github.com/Genymobile/scrcpy/releases/download/v1.18/scrcpy-win64-v1.18.zip
 
 It is also available in [Chocolatey]:
 
@@ -116,13 +127,18 @@ brew install scrcpy
 You need `adb`, accessible from your `PATH`. If you don't have it yet:
 
 ```bash
-# Homebrew >= 2.6.0
-brew install --cask android-platform-tools
-
-# Homebrew < 2.6.0
-brew cask install android-platform-tools
+brew install android-platform-tools
 ```
 
+It's also available in [MacPorts], which sets up adb for you:
+
+```bash
+sudo port install scrcpy
+```
+
+[MacPorts]: https://www.macports.org/
+
+
 You can also [build the app manually][BUILD].
 
 
@@ -198,10 +214,11 @@ If `--max-size` is also specified, resizing is applied after cropping.
 To lock the orientation of the mirroring:
 
 ```bash
-scrcpy --lock-video-orientation 0   # natural orientation
-scrcpy --lock-video-orientation 1   # 90° counterclockwise
-scrcpy --lock-video-orientation 2   # 180°
-scrcpy --lock-video-orientation 3   # 90° clockwise
+scrcpy --lock-video-orientation     # initial (current) orientation
+scrcpy --lock-video-orientation=0   # natural orientation
+scrcpy --lock-video-orientation=1   # 90° counterclockwise
+scrcpy --lock-video-orientation=2   # 180°
+scrcpy --lock-video-orientation=3   # 90° clockwise
 ```
 
 This affects recording orientation.
@@ -225,7 +242,9 @@ error will give the available encoders:
 scrcpy --encoder _
 ```
 
-### Recording
+### Capture
+
+#### Recording
 
 It is possible to record the screen while mirroring:
 
@@ -249,6 +268,77 @@ variation] does not impact the recorded file.
 [packet delay variation]: https://en.wikipedia.org/wiki/Packet_delay_variation
 
 
+#### v4l2loopback
+
+On Linux, it is possible to send the video stream to a v4l2 loopback device, so
+that the Android device can be opened like a webcam by any v4l2-capable tool.
+
+The module `v4l2loopback` must be installed:
+
+```bash
+sudo apt install v4l2loopback-dkms
+```
+
+To create a v4l2 device:
+
+```bash
+sudo modprobe v4l2loopback
+```
+
+This will create a new video device in `/dev/videoN`, where `N` is an integer
+(more [options](https://github.com/umlaeute/v4l2loopback#options) are available
+to create several devices or devices with specific IDs).
+
+To list the enabled devices:
+
+```bash
+# requires v4l-utils package
+v4l2-ctl --list-devices
+
+# simple but might be sufficient
+ls /dev/video*
+```
+
+To start scrcpy using a v4l2 sink:
+
+```bash
+scrcpy --v4l2-sink=/dev/videoN
+scrcpy --v4l2-sink=/dev/videoN --no-display  # disable mirroring window
+scrcpy --v4l2-sink=/dev/videoN -N            # short version
+```
+
+(replace `N` by the device ID, check with `ls /dev/video*`)
+
+Once enabled, you can open your video stream with a v4l2-capable tool:
+
+```bash
+ffplay -i /dev/videoN
+vlc v4l2:///dev/videoN   # VLC might add some buffering delay
+```
+
+For example, you could capture the video within [OBS].
+
+[OBS]: https://obsproject.com/fr
+
+
+#### Buffering
+
+It is possible to add buffering. This increases latency but reduces jitter (see
+#2464).
+
+The option is available for display buffering:
+
+```bash
+scrcpy --display-buffer=50  # add 50 ms buffering for display
+```
+
+and V4L2 sink:
+
+```bash
+scrcpy --v4l2-buffer=500    # add 500 ms buffering for v4l2 sink
+```
+
+
 ### Connection
 
 #### Wireless
@@ -411,7 +501,7 @@ _(left)_ and <kbd>MOD</kbd>+<kbd>→</kbd> _(right)_.
 
 Note that _scrcpy_ manages 3 different rotations:
  - <kbd>MOD</kbd>+<kbd>r</kbd> requests the device to switch between portrait
-   and landscape (the current running app may refuse, if it does support the
+   and landscape (the current running app may refuse, if it does not support the
    requested orientation).
  - [`--lock-video-orientation`](#lock-video-orientation) changes the mirroring
    orientation (the orientation of the video sent from the device to the
@@ -444,7 +534,7 @@ scrcpy --display 1
 
 The list of display ids can be retrieved by:
 
-```
+```bash
 adb shell dumpsys display   # search "mDisplayId=" in the output
 ```
 
@@ -491,18 +581,6 @@ scrcpy -Sw
 ```
 
 
-#### Render expired frames
-
-By default, to minimize latency, _scrcpy_ always renders the last decoded frame
-available, and drops any previous one.
-
-To force the rendering of all frames (at a cost of a possible increased
-latency), use:
-
-```bash
-scrcpy --render-expired-frames
-```
-
 #### Show touches
 
 For presentations, it may be useful to show physical touches (on the physical
@@ -650,15 +728,15 @@ There is no visual feedback, a log is printed to the console.
 
 #### Push file to device
 
-To push a file to `/sdcard/` on the device, drag & drop a (non-APK) file to the
-_scrcpy_ window.
+To push a file to `/sdcard/Download/` on the device, drag & drop a (non-APK)
+file to the _scrcpy_ window.
 
 There is no visual feedback, a log is printed to the console.
 
 The target directory can be changed on start:
 
 ```bash
-scrcpy --push-target /sdcard/foo/bar/
+scrcpy --push-target=/sdcard/Movies/
 ```
 
 
@@ -698,10 +776,10 @@ _<kbd>[Super]</kbd> is typically the <kbd>Windows</kbd> or <kbd>Cmd</kbd> key._
  | Rotate display left                         | <kbd>MOD</kbd>+<kbd>←</kbd> _(left)_
  | Rotate display right                        | <kbd>MOD</kbd>+<kbd>→</kbd> _(right)_
  | Resize window to 1:1 (pixel-perfect)        | <kbd>MOD</kbd>+<kbd>g</kbd>
- | Resize window to remove black borders       | <kbd>MOD</kbd>+<kbd>w</kbd> \| _Double-click¹_
+ | Resize window to remove black borders       | <kbd>MOD</kbd>+<kbd>w</kbd> \| _Double-left-click¹_
  | Click on `HOME`                             | <kbd>MOD</kbd>+<kbd>h</kbd> \| _Middle-click_
  | Click on `BACK`                             | <kbd>MOD</kbd>+<kbd>b</kbd> \| _Right-click²_
- | Click on `APP_SWITCH`                       | <kbd>MOD</kbd>+<kbd>s</kbd>
+ | Click on `APP_SWITCH`                       | <kbd>MOD</kbd>+<kbd>s</kbd> \| _4th-click³_
  | Click on `MENU` (unlock screen)             | <kbd>MOD</kbd>+<kbd>m</kbd>
  | Click on `VOLUME_UP`                        | <kbd>MOD</kbd>+<kbd>↑</kbd> _(up)_
  | Click on `VOLUME_DOWN`                      | <kbd>MOD</kbd>+<kbd>↓</kbd> _(down)_
@@ -710,18 +788,27 @@ _<kbd>[Super]</kbd> is typically the <kbd>Windows</kbd> or <kbd>Cmd</kbd> key._
  | Turn device screen off (keep mirroring)     | <kbd>MOD</kbd>+<kbd>o</kbd>
  | Turn device screen on                       | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>o</kbd>
  | Rotate device screen                        | <kbd>MOD</kbd>+<kbd>r</kbd>
- | Expand notification panel                   | <kbd>MOD</kbd>+<kbd>n</kbd>
- | Collapse notification panel                 | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>n</kbd>
- | Copy to clipboard³                          | <kbd>MOD</kbd>+<kbd>c</kbd>
- | Cut to clipboard³                           | <kbd>MOD</kbd>+<kbd>x</kbd>
- | Synchronize clipboards and paste³           | <kbd>MOD</kbd>+<kbd>v</kbd>
+ | Expand notification panel                   | <kbd>MOD</kbd>+<kbd>n</kbd> \| _5th-click³_
+ | Expand settings panel                       |  <kbd>MOD</kbd>+<kbd>n</kbd>+<kbd>n</kbd> \| _Double-5th-click³_
+ | Collapse panels                             | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>n</kbd>
+ | Copy to clipboard⁴                          | <kbd>MOD</kbd>+<kbd>c</kbd>
+ | Cut to clipboard⁴                           | <kbd>MOD</kbd>+<kbd>x</kbd>
+ | Synchronize clipboards and paste⁴           | <kbd>MOD</kbd>+<kbd>v</kbd>
  | Inject computer clipboard text              | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd>
  | Enable/disable FPS counter (on stdout)      | <kbd>MOD</kbd>+<kbd>i</kbd>
  | Pinch-to-zoom                               | <kbd>Ctrl</kbd>+_click-and-move_
 
 _¹Double-click on black borders to remove them._  
 _²Right-click turns the screen on if it was off, presses BACK otherwise._  
-_³Only on Android >= 7._
+_³4th and 5th mouse buttons, if your mouse has them._  
+_⁴Only on Android >= 7._
+
+Shortcuts with repeated keys are executted by releasing and pressing the key a
+second time. For example, to execute "Expand settings panel":
+
+ 1. Press and keep pressing <kbd>MOD</kbd>.
+ 2. Then double-press <kbd>n</kbd>.
+ 3. Finally, release <kbd>MOD</kbd>.
 
 All <kbd>Ctrl</kbd>+_key_ shortcuts are forwarded to the device, so they are
 handled by the active application.
@@ -732,7 +819,9 @@ handled by the active application.
 To use a specific _adb_ binary, configure its path in the environment variable
 `ADB`:
 
-    ADB=/path/to/adb scrcpy
+```bash
+ADB=/path/to/adb scrcpy
+```
 
 To override the path of the `scrcpy-server` file, configure its path in
 `SCRCPY_SERVER_PATH`.
@@ -754,8 +843,6 @@ A colleague challenged me to find a name as unpronounceable as [gnirehtet].
 
 See [BUILD].
 
-[BUILD]: BUILD.md
-
 
 ## Common issues
 
@@ -799,9 +886,12 @@ Read the [developers page].
 This README is available in other languages:
 
 - [Indonesian (Indonesia, `id`) - v1.16](README.id.md)
+- [Italiano (Italiano, `it`) - v1.17](README.it.md)
+- [日本語 (Japanese, `jp`) - v1.17](README.jp.md)
 - [한국어 (Korean, `ko`) - v1.11](README.ko.md)
-- [português brasileiro (Brazilian Portuguese, `pt-BR`) - v1.12.1](README.pt-br.md)
-- [简体中文 (Simplified Chinese, `zh-Hans`) - v1.16](README.zh-Hans.md)
+- [português brasileiro (Brazilian Portuguese, `pt-BR`) - v1.17](README.pt-br.md)
+- [Español (Spanish, `sp`) - v1.17](README.sp.md)
+- [简体中文 (Simplified Chinese, `zh-Hans`) - v1.17](README.zh-Hans.md)
 - [繁體中文 (Traditional Chinese, `zh-Hant`) - v1.15](README.zh-Hant.md)
 
 Only this README file is guaranteed to be up-to-date.

README.pt-br.md

@@ -1,16 +1,16 @@
-_Only the original [README](README.md) is guaranteed to be up-to-date._
+_Apenas o [README](README.md) original é garantido estar atualizado._
 
-# scrcpy (v1.12.1)
+# scrcpy (v1.17)
 
-Esta aplicação fornece visualização e controle de dispositivos Android conectados via
-USB (ou [via TCP/IP][article-tcpip]). Não requer nenhum acesso root.
+Esta aplicação fornece exibição e controle de dispositivos Android conectados via
+USB (ou [via TCP/IP][article-tcpip]). Não requer nenhum acesso _root_.
 Funciona em _GNU/Linux_, _Windows_ e _macOS_.
 
 ![screenshot](assets/screenshot-debian-600.jpg)
 
 Foco em:
 
- - **leveza** (Nativo, mostra apenas a tela do dispositivo)
+ - **leveza** (nativo, mostra apenas a tela do dispositivo)
  - **performance** (30~60fps)
  - **qualidade** (1920×1080 ou acima)
  - **baixa latência** ([35~70ms][lowlatency])
@@ -22,36 +22,41 @@ Foco em:
 
 ## Requisitos
 
-O Dispositivo Android requer pelo menos a API 21 (Android 5.0).
+O dispositivo Android requer pelo menos a API 21 (Android 5.0).
 
-
-Tenha certeza de ter [ativado a depuração USB][enable-adb] no(s) seu(s) dispositivo(s).
+Tenha certeza de ter [ativado a depuração adb][enable-adb] no(s) seu(s) dispositivo(s).
 
 [enable-adb]: https://developer.android.com/studio/command-line/adb.html#Enabling
 
-
-Em alguns dispositivos, você também precisará ativar [uma opção adicional][control] para controlá-lo usando o teclado e mouse.
+Em alguns dispositivos, você também precisa ativar [uma opção adicional][control] para
+controlá-lo usando teclado e mouse.
 
 [control]: https://github.com/Genymobile/scrcpy/issues/70#issuecomment-373286323
 
 
-## Obtendo o app
+## Obter o app
 
+<a href="https://repology.org/project/scrcpy/versions"><img src="https://repology.org/badge/vertical-allrepos/scrcpy.svg" alt="Packaging status" align="right"></a>
 
 ### Linux
 
-No Debian (_em testes_ e _sid_ por enquanto):
+No Debian (_testing_ e _sid_ por enquanto) e Ubuntu (20.04):
 
 ```
 apt install scrcpy
 ```
 
-O pacote [Snap] está disponível: [`scrcpy`][snap-link].
+Um pacote [Snap] está disponível: [`scrcpy`][snap-link].
 
 [snap-link]: https://snapstats.org/snaps/scrcpy
 
 [snap]: https://en.wikipedia.org/wiki/Snappy_(package_manager)
 
+Para Fedora, um pacote [COPR] está disponível: [`scrcpy`][copr-link].
+
+[COPR]: https://fedoraproject.org/wiki/Category:Copr
+[copr-link]: https://copr.fedorainfracloud.org/coprs/zeno/scrcpy/
+
 Para Arch Linux, um pacote [AUR] está disponível: [`scrcpy`][aur-link].
 
 [AUR]: https://wiki.archlinux.org/index.php/Arch_User_Repository
@@ -62,21 +67,19 @@ Para Gentoo, uma [Ebuild] está disponível: [`scrcpy/`][ebuild-link].
 [Ebuild]: https://wiki.gentoo.org/wiki/Ebuild
 [ebuild-link]: https://github.com/maggu2810/maggu2810-overlay/tree/master/app-mobilephone/scrcpy
 
+Você também pode [compilar o app manualmente][BUILD] (não se preocupe, não é tão
+difícil).
 
-Você também pode [compilar a aplicação manualmente][BUILD] (não se preocupe, não é tão difícil).
 
 
 ### Windows
 
-Para Windows, para simplicidade, um arquivo pré-compilado com todas as dependências
+Para Windows, por simplicidade, um arquivo pré-compilado com todas as dependências
 (incluindo `adb`) está disponível:
 
- - [`scrcpy-win64-v1.12.1.zip`][direct-win64]  
-   _(SHA-256: 57d34b6d16cfd9fe169bc37c4df58ebd256d05c1ea3febc63d9cb0a027ab47c9)_
+ - [README](README.md#windows)
 
-[direct-win64]: https://github.com/Genymobile/scrcpy/releases/download/v1.12.1/scrcpy-win64-v1.12.1.zip
-
-Também disponível em [Chocolatey]:
+Também está disponível em [Chocolatey]:
 
 [Chocolatey]: https://chocolatey.org/
 
@@ -94,12 +97,12 @@ scoop install adb    # se você ainda não o tem
 
 [Scoop]: https://scoop.sh
 
-Você também pode [compilar a aplicação manualmente][BUILD].
+Você também pode [compilar o app manualmente][BUILD].
 
 
 ### macOS
 
-A aplicação está disponível em [Homebrew]. Apenas a instale:
+A aplicação está disponível em [Homebrew]. Apenas instale-a:
 
 [Homebrew]: https://brew.sh/
 
@@ -107,18 +110,22 @@ A aplicação está disponível em [Homebrew]. Apenas a instale:
 brew install scrcpy
 ```
 
-Você precisa do `adb`, acessível através do seu `PATH`. Se você ainda não o tem:
+Você precisa do `adb`, acessível pelo seu `PATH`. Se você ainda não o tem:
 
 ```bash
+# Homebrew >= 2.6.0
+brew install --cask android-platform-tools
+
+# Homebrew < 2.6.0
 brew cask install android-platform-tools
 ```
 
-Você também pode [compilar a aplicação manualmente][BUILD].
+Você também pode [compilar o app manualmente][BUILD].
 
 
 ## Executar
 
-Plugue um dispositivo Android e execute:
+Conecte um dispositivo Android e execute:
 
 ```bash
 scrcpy
@@ -134,52 +141,87 @@ scrcpy --help
 
 ### Configuração de captura
 
-#### Redução de tamanho
+#### Reduzir tamanho
 
 Algumas vezes, é útil espelhar um dispositivo Android em uma resolução menor para
-aumentar performance.
+aumentar a performance.
 
-Para limitar ambos(largura e altura) para algum valor (ex: 1024):
+Para limitar ambos (largura e altura) para algum valor (ex: 1024):
 
 ```bash
 scrcpy --max-size 1024
-scrcpy -m 1024  # versão reduzida
+scrcpy -m 1024  # versão curta
 ```
 
 A outra dimensão é calculada para que a proporção do dispositivo seja preservada.
-Dessa forma, um dispositivo em 1920x1080 será espelhado em 1024x576.
+Dessa forma, um dispositivo de 1920x1080 será espelhado em 1024x576.
 
 
-#### Mudanças no bit-rate
+#### Mudar bit-rate
 
-O Padrão de bit-rate é 8 mbps. Para mudar o bitrate do vídeo (ex: para 2 Mbps):
+O bit-rate padrão é 8 Mbps. Para mudar o bit-rate do vídeo (ex: para 2 Mbps):
 
 ```bash
 scrcpy --bit-rate 2M
-scrcpy -b 2M  # versão reduzida
+scrcpy -b 2M  # versão curta
 ```
 
-#### Limitar frame rates
+#### Limitar frame rate
 
-Em dispositivos com Android >= 10, a captura de frame rate pode ser limitada:
+O frame rate de captura pode ser limitado:
 
 ```bash
 scrcpy --max-fps 15
 ```
 
+Isso é oficialmente suportado desde o Android 10, mas pode funcionar em versões anteriores.
+
 #### Cortar
 
 A tela do dispositivo pode ser cortada para espelhar apenas uma parte da tela.
 
-Isso é útil por exemplo, ao espelhar apenas um olho do Oculus Go:
+Isso é útil por exemplo, para espelhar apenas um olho do Oculus Go:
 
 ```bash
 scrcpy --crop 1224:1440:0:0   # 1224x1440 no deslocamento (0,0)
 ```
 
-Se `--max-size` também for especificado, redimensionar é aplicado após os cortes.
+Se `--max-size` também for especificado, o redimensionamento é aplicado após o corte.
 
 
+#### Travar orientação do vídeo
+
+
+Para travar a orientação do espelhamento:
+
+```bash
+scrcpy --lock-video-orientation 0   # orientação natural
+scrcpy --lock-video-orientation 1   # 90° sentido anti-horário
+scrcpy --lock-video-orientation 2   # 180°
+scrcpy --lock-video-orientation 3   # 90° sentido horário
+```
+
+Isso afeta a orientação de gravação.
+
+A [janela também pode ser rotacionada](#rotação) independentemente.
+
+
+#### Encoder
+
+Alguns dispositivos têm mais de um encoder, e alguns deles podem causar problemas ou
+travar. É possível selecionar um encoder diferente:
+
+```bash
+scrcpy --encoder OMX.qcom.video.encoder.avc
+```
+
+Para listar os encoders disponíveis, você pode passar um nome de encoder inválido, o
+erro dará os encoders disponíveis:
+
+```bash
+scrcpy --encoder _
+```
+
 ### Gravando
 
 É possível gravar a tela enquanto ocorre o espelhamento:
@@ -194,65 +236,84 @@ Para desativar o espelhamento durante a gravação:
 ```bash
 scrcpy --no-display --record file.mp4
 scrcpy -Nr file.mkv
-# interrompe a gravação com Ctrl+C
-# Ctrl+C não encerrar propriamente no Windows, então desconecte o dispositivo
+# interrompa a gravação com Ctrl+C
 ```
 
-"Frames pulados" são gravados, mesmo que não sejam mostrado em tempo real (por motivos de performance).
-Frames tem seu _horário_ _carimbado_ no dispositivo, então [Variação de atraso nos pacotes] não impacta na gravação do arquivo.
+"Frames pulados" são gravados, mesmo que não sejam exibidos em tempo real (por
+motivos de performance). Frames têm seu _horário carimbado_ no dispositivo, então [variação de atraso nos
+pacotes][packet delay variation] não impacta o arquivo gravado.
 
-[Variação de atraso de pacote]: https://en.wikipedia.org/wiki/Packet_delay_variation
+[packet delay variation]: https://en.wikipedia.org/wiki/Packet_delay_variation
 
 
 ### Conexão
 
-#### Wireless/Sem fio
+#### Sem fio
 
-_Scrcpy_ usa `adb` para se comunicar com o dispositivo, e `adb` pode [conectar-se] à um dispositivo via TCP/IP:
+_Scrcpy_ usa `adb` para se comunicar com o dispositivo, e `adb` pode [conectar-se][connect] a um
+dispositivo via TCP/IP:
+
+1. Conecte o dispositivo no mesmo Wi-Fi do seu computador.
+2. Pegue o endereço IP do seu dispositivo, em Configurações → Sobre o telefone → Status, ou
+   executando este comando:
+
+    ```bash
+    adb shell ip route | awk '{print $9}'
+    ```
 
-1. Conecte o dispositivo a mesma rede Wi-Fi do seu computador.
-2. Pegue o endereço de IP do seu dispositivo (Em Configurações → Sobre o Telefone → Status).
 3. Ative o adb via TCP/IP no seu dispositivo: `adb tcpip 5555`.
-4. Desplugue seu dispositivo.
-5. Conecte-se ao seu dispositivo: `adb connect DEVICE_IP:5555` _(substitua o `DEVICE_IP`)_.
+4. Desconecte seu dispositivo.
+5. Conecte-se ao seu dispositivo: `adb connect DEVICE_IP:5555` _(substitua `DEVICE_IP`)_.
 6. Execute `scrcpy` como de costume.
 
 Pode ser útil diminuir o bit-rate e a resolução:
 
 ```bash
 scrcpy --bit-rate 2M --max-size 800
-scrcpy -b2M -m800  # versão reduzida
+scrcpy -b2M -m800  # versão curta
 ```
 
-[conectar-se]: https://developer.android.com/studio/command-line/adb.html#wireless
+[connect]: https://developer.android.com/studio/command-line/adb.html#wireless
 
 
-#### N-dispositivos
+#### Múltiplos dispositivos
 
-Se alguns dispositivos estão listados em `adb devices`, você precisa especificar o _serial_:
+Se vários dispositivos são listados em `adb devices`, você deve especificar o _serial_:
 
 ```bash
 scrcpy --serial 0123456789abcdef
-scrcpy -s 0123456789abcdef  # versão reduzida
+scrcpy -s 0123456789abcdef  # versão curta
 ```
 
 Se o dispositivo está conectado via TCP/IP:
 
 ```bash
 scrcpy --serial 192.168.0.1:5555
-scrcpy -s 192.168.0.1:5555  # versão reduzida
+scrcpy -s 192.168.0.1:5555  # versão curta
 ```
 
-Você pode iniciar algumas instâncias do _scrcpy_ para alguns dispositivos.
+Você pode iniciar várias instâncias do _scrcpy_ para vários dispositivos.
 
-#### Conexão via SSH
+#### Iniciar automaticamente quando dispositivo é conectado
 
-Para conectar-se à um dispositivo remoto, é possível se conectar um cliente local `adb`  à um servidor `adb` remoto (contanto que eles usem a mesma versão do protocolo _adb_):
+Você pode usar [AutoAdb]:
 
 ```bash
-adb kill-server    # encerra o servidor local na 5037
+autoadb scrcpy -s '{}'
+```
+
+[AutoAdb]: https://github.com/rom1v/autoadb
+
+#### Túnel SSH
+
+Para conectar-se a um dispositivo remoto, é possível conectar um cliente `adb` local a
+um servidor `adb` remoto (contanto que eles usem a mesma versão do protocolo
+_adb_):
+
+```bash
+adb kill-server    # encerra o servidor adb local em 5037
 ssh -CN -L5037:localhost:5037 -R27183:localhost:27183 your_remote_computer
-# mantém isso aberto
+# mantenha isso aberto
 ```
 
 De outro terminal:
@@ -261,17 +322,33 @@ De outro terminal:
 scrcpy
 ```
 
-Igual para conexões sem fio, pode ser útil reduzir a qualidade:
+Para evitar ativar o encaminhamento de porta remota, você pode forçar uma conexão
+de encaminhamento (note o `-L` em vez de `-R`):
+
+```bash
+adb kill-server    # encerra o servidor adb local em 5037
+ssh -CN -L5037:localhost:5037 -L27183:localhost:27183 your_remote_computer
+# mantenha isso aberto
+```
+
+De outro terminal:
+
+```bash
+scrcpy --force-adb-forward
+```
+
+
+Igual a conexões sem fio, pode ser útil reduzir a qualidade:
 
 ```
 scrcpy -b2M -m800 --max-fps 15
 ```
 
-### Configurações de Janela
+### Configuração de janela
 
 #### Título
 
-Por padrão, o título da janela é o modelo do dispositivo. Isto pode ser mudado:
+Por padrão, o título da janela é o modelo do dispositivo. Isso pode ser mudado:
 
 ```bash
 scrcpy --window-title 'Meu dispositivo'
@@ -287,15 +364,15 @@ scrcpy --window-x 100 --window-y 100 --window-width 800 --window-height 600
 
 #### Sem bordas
 
-Para desativar decorações da janela:
+Para desativar decorações de janela:
 
 ```bash
 scrcpy --window-borderless
 ```
 
-#### Sempre visível
+#### Sempre no topo
 
-Para manter a janela do scrcpy sempre visível:
+Para manter a janela do scrcpy sempre no topo:
 
 ```bash
 scrcpy --always-on-top
@@ -307,41 +384,117 @@ A aplicação pode ser iniciada diretamente em tela cheia:
 
 ```bash
 scrcpy --fullscreen
-scrcpy -f  # versão reduzida
+scrcpy -f  # versão curta
 ```
 
-Tela cheia pode ser alternada dinamicamente com `Ctrl`+`f`.
+Tela cheia pode ser alternada dinamicamente com <kbd>MOD</kbd>+<kbd>f</kbd>.
+
+#### Rotação
+
+A janela pode ser rotacionada:
+
+```bash
+scrcpy --rotation 1
+```
+
+Valores possíveis são:
+ - `0`: sem rotação
+ - `1`: 90 graus sentido anti-horário
+ - `2`: 180 graus
+ - `3`: 90 graus sentido horário
+
+A rotação também pode ser mudada dinamicamente com <kbd>MOD</kbd>+<kbd>←</kbd>
+_(esquerda)_ e <kbd>MOD</kbd>+<kbd>→</kbd> _(direita)_.
+
+Note que _scrcpy_ controla 3 rotações diferentes:
+ - <kbd>MOD</kbd>+<kbd>r</kbd> requisita ao dispositivo para mudar entre retrato
+   e paisagem (a aplicação em execução pode se recusar, se ela não suporta a
+   orientação requisitada).
+ - [`--lock-video-orientation`](#travar-orientação-do-vídeo) muda a orientação de
+   espelhamento (a orientação do vídeo enviado pelo dispositivo para o
+   computador). Isso afeta a gravação.
+ - `--rotation` (ou <kbd>MOD</kbd>+<kbd>←</kbd>/<kbd>MOD</kbd>+<kbd>→</kbd>)
+   rotaciona apenas o conteúdo da janela. Isso afeta apenas a exibição, não a
+   gravação.
 
 
 ### Outras opções de espelhamento
 
 #### Apenas leitura
 
-Para desativar controles (tudo que possa interagir com o dispositivo: teclas de entrada, eventos de mouse, arrastar e soltar arquivos):
+Para desativar controles (tudo que possa interagir com o dispositivo: teclas de entrada,
+eventos de mouse, arrastar e soltar arquivos):
 
 ```bash
 scrcpy --no-control
 scrcpy -n
 ```
 
-#### Desligar a tela
+#### Display
 
-É possível desligar a tela do dispositivo durante o início do espelhamento com uma opção de linha de comando:
+Se vários displays estão disponíveis, é possível selecionar o display para
+espelhar:
+
+```bash
+scrcpy --display 1
+```
+
+A lista de IDs dos displays pode ser obtida por:
+
+```
+adb shell dumpsys display   # busca "mDisplayId=" na saída
+```
+
+O display secundário pode apenas ser controlado se o dispositivo roda pelo menos Android
+10 (caso contrário é espelhado como apenas leitura).
+
+
+#### Permanecer ativo
+
+Para evitar que o dispositivo seja suspenso após um delay quando o dispositivo é conectado:
+
+```bash
+scrcpy --stay-awake
+scrcpy -w
+```
+
+O estado inicial é restaurado quando o scrcpy é fechado.
+
+
+#### Desligar tela
+
+É possível desligar a tela do dispositivo durante o início do espelhamento com uma
+opção de linha de comando:
 
 ```bash
 scrcpy --turn-screen-off
 scrcpy -S
 ```
 
-Ou apertando `Ctrl`+`o` durante qualquer momento.
+Ou apertando <kbd>MOD</kbd>+<kbd>o</kbd> a qualquer momento.
 
-Para ligar novamente, pressione `POWER` (ou `Ctrl`+`p`).
+Para ligar novamente, pressione <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>o</kbd>.
 
-#### Frames expirados de renderização
+No Android, o botão de `POWER` sempre liga a tela. Por conveniência, se
+`POWER` é enviado via scrcpy (via clique-direito ou <kbd>MOD</kbd>+<kbd>p</kbd>), ele
+forçará a desligar a tela após um delay pequeno (numa base de melhor esforço).
+O botão `POWER` físico ainda causará a tela ser ligada.
 
-Por padrão, para minimizar a latência, _scrcpy_ sempre renderiza o último frame decodificado disponível e descarta o anterior.
+Também pode ser útil evitar que o dispositivo seja suspenso:
 
-Para forçar a renderização de todos os frames ( com o custo de aumento de latência), use:
+```bash
+scrcpy --turn-screen-off --stay-awake
+scrcpy -Sw
+```
+
+
+#### Renderizar frames expirados
+
+Por padrão, para minimizar a latência, _scrcpy_ sempre renderiza o último frame decodificado
+disponível, e descarta o anterior.
+
+Para forçar a renderização de todos os frames (com o custo de um possível aumento de
+latência), use:
 
 ```bash
 scrcpy --render-expired-frames
@@ -349,11 +502,13 @@ scrcpy --render-expired-frames
 
 #### Mostrar toques
 
-Para apresentações, pode ser útil mostrar toques físicos(dispositivo físico).
+Para apresentações, pode ser útil mostrar toques físicos (no dispositivo
+físico).
 
-Android fornece esta funcionalidade nas _Opções do Desenvolvedor_.
+Android fornece esta funcionalidade nas _Opções do desenvolvedor_.
 
-_Scrcpy_ fornece esta opção de ativar esta funcionalidade no início e desativar no encerramento:
+_Scrcpy_ fornece esta opção de ativar esta funcionalidade no início e restaurar o
+valor inicial no encerramento:
 
 ```bash
 scrcpy --show-touches
@@ -363,59 +518,137 @@ scrcpy -t
 Note que isto mostra apenas toques _físicos_ (com o dedo no dispositivo).
 
 
+#### Desativar descanso de tela
+
+Por padrão, scrcpy não evita que o descanso de tela rode no computador.
+
+Para desativá-lo:
+
+```bash
+scrcpy --disable-screensaver
+```
+
+
 ### Controle de entrada
 
 #### Rotacionar a tela do dispositivo
 
-Pressione `Ctrl`+`r` para mudar entre os modos Retrato e Paisagem.
+Pressione <kbd>MOD</kbd>+<kbd>r</kbd> para mudar entre os modos retrato e
+paisagem.
 
-Note que só será rotacionado se a aplicação em primeiro plano tiver suporte para o modo requisitado.
+Note que só será rotacionado se a aplicação em primeiro plano suportar a
+orientação requisitada.
 
-#### Copiar-Colar
+#### Copiar-colar
 
-É possível sincronizar áreas de transferência entre computador e o dispositivo,
-para ambas direções:
+Sempre que a área de transferência do Android muda, é automaticamente sincronizada com a
+área de transferência do computador.
 
- - `Ctrl`+`c` copia a área de transferência do dispositivo para a área de trasferência do computador;
- - `Ctrl`+`Shift`+`v` copia a área de transferência do computador para a área de transferência do dispositivo;
- - `Ctrl`+`v` _cola_ a área de transferência do computador como uma sequência de eventos de texto (mas
-   quebra caracteres não-ASCII).
+Qualquer atalho com <kbd>Ctrl</kbd> é encaminhado para o dispositivo. Em particular:
+ - <kbd>Ctrl</kbd>+<kbd>c</kbd> tipicamente copia
+ - <kbd>Ctrl</kbd>+<kbd>x</kbd> tipicamente recorta
+ - <kbd>Ctrl</kbd>+<kbd>v</kbd> tipicamente cola (após a sincronização de área de transferência
+   computador-para-dispositivo)
 
-#### Preferências de injeção de texto
+Isso tipicamente funciona como esperado.
 
-Existe dois tipos de [eventos][textevents] gerados ao digitar um texto:
- - _eventos de teclas_, sinalizando que a tecla foi pressionada ou solta;
+O comportamento de fato depende da aplicação ativa, no entanto. Por exemplo,
+_Termux_ envia SIGINT com <kbd>Ctrl</kbd>+<kbd>c</kbd>, e _K-9 Mail_
+compõe uma nova mensagem.
+
+Para copiar, recortar e colar em tais casos (mas apenas suportado no Android >= 7):
+ - <kbd>MOD</kbd>+<kbd>c</kbd> injeta `COPY`
+ - <kbd>MOD</kbd>+<kbd>x</kbd> injeta `CUT`
+ - <kbd>MOD</kbd>+<kbd>v</kbd> injeta `PASTE` (após a sincronização de área de transferência
+   computador-para-dispositivo)
+
+Em adição, <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd> permite injetar o
+texto da área de transferência do computador como uma sequência de eventos de tecla. Isso é útil quando o
+componente não aceita colar texto (por exemplo no _Termux_), mas pode
+quebrar conteúdo não-ASCII.
+
+**ADVERTÊNCIA:** Colar a área de transferência do computador para o dispositivo (tanto via
+<kbd>Ctrl</kbd>+<kbd>v</kbd> quanto <kbd>MOD</kbd>+<kbd>v</kbd>) copia o conteúdo
+para a área de transferência do dispositivo. Como consequência, qualquer aplicação Android pode ler
+o seu conteúdo. Você deve evitar colar conteúdo sensível (como senhas) dessa
+forma.
+
+Alguns dispositivos não se comportam como esperado quando a área de transferência é definida
+programaticamente. Uma opção `--legacy-paste` é fornecida para mudar o comportamento
+de <kbd>Ctrl</kbd>+<kbd>v</kbd> e <kbd>MOD</kbd>+<kbd>v</kbd> para que eles
+também injetem o texto da área de transferência do computador como uma sequência de eventos de tecla (da mesma
+forma que <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd>).
+
+#### Pinçar para dar zoom
+
+Para simular "pinçar para dar zoom": <kbd>Ctrl</kbd>+_clicar-e-mover_.
+
+Mais precisamente, segure <kbd>Ctrl</kbd> enquanto pressiona o botão de clique-esquerdo. Até que
+o botão de clique-esquerdo seja liberado, todos os movimentos do mouse ampliar e rotacionam o
+conteúdo (se suportado pelo app) relativo ao centro da tela.
+
+Concretamente, scrcpy gera eventos adicionais de toque de um "dedo virtual" em
+uma posição invertida em relação ao centro da tela.
+
+
+#### Preferência de injeção de texto
+
+Existem dois tipos de [eventos][textevents] gerados ao digitar um texto:
+ - _eventos de tecla_, sinalizando que a tecla foi pressionada ou solta;
  - _eventos de texto_, sinalizando que o texto foi inserido.
 
-Por padrão, letras são injetadas usando eventos de teclas, assim teclados comportam-se
-como esperado em jogos (normalmente para tecladas WASD)
+Por padrão, letras são injetadas usando eventos de tecla, assim o teclado comporta-se
+como esperado em jogos (normalmente para teclas WASD).
 
-Mas isto pode [causar problemas][prefertext]. Se você encontrar tal problema,
-pode evitá-lo usando:
+Mas isso pode [causar problemas][prefertext]. Se você encontrar tal problema, você
+pode evitá-lo com:
 
 ```bash
 scrcpy --prefer-text
 ```
 
-(mas isto vai quebrar o comportamento do teclado em jogos)
+(mas isso vai quebrar o comportamento do teclado em jogos)
 
 [textevents]: https://blog.rom1v.com/2018/03/introducing-scrcpy/#handle-text-input
 [prefertext]: https://github.com/Genymobile/scrcpy/issues/650#issuecomment-512945343
 
 
-### Transferência de arquivo
+#### Repetir tecla
+
+Por padrão, segurar uma tecla gera eventos de tecla repetidos. Isso pode causar
+problemas de performance em alguns jogos, onde esses eventos são inúteis de qualquer forma.
+
+Para evitar o encaminhamento eventos de tecla repetidos:
+
+```bash
+scrcpy --no-key-repeat
+```
+
+
+#### Clique-direito e clique-do-meio
+
+Por padrão, clique-direito dispara BACK (ou POWER) e clique-do-meio dispara
+HOME. Para desabilitar esses atalhos e encaminhar os cliques para o dispositivo:
+
+```bash
+scrcpy --forward-all-clicks
+```
+
+
+### Soltar arquivo
 
 #### Instalar APK
 
-Para instalar um APK, arraste e solte o arquivo APK(com extensão `.apk`) na janela _scrcpy_.
+Para instalar um APK, arraste e solte o arquivo APK (com extensão `.apk`) na janela
+_scrcpy_.
 
 Não existe feedback visual, um log é imprimido no console.
 
 
-#### Enviar arquivo para o dispositivo
+#### Enviar arquivo para dispositivo
 
-Para enviar um arquivo para o diretório `/sdcard/` no dispositivo, arraste e solte um arquivo não APK para a janela do
-_scrcpy_.
+Para enviar um arquivo para `/sdcard/` no dispositivo, arraste e solte um arquivo (não-APK) para a
+janela do _scrcpy_.
 
 Não existe feedback visual, um log é imprimido no console.
 
@@ -428,45 +661,73 @@ scrcpy --push-target /sdcard/foo/bar/
 
 ### Encaminhamento de áudio
 
-Áudio não é encaminhando pelo _scrcpy_. Use [USBaudio] (Apenas linux).
+Áudio não é encaminhado pelo _scrcpy_. Use [sndcpy].
 
 Também veja [issue #14].
 
-[USBaudio]: https://github.com/rom1v/usbaudio
+[sndcpy]: https://github.com/rom1v/sndcpy
 [issue #14]: https://github.com/Genymobile/scrcpy/issues/14
 
 
 ## Atalhos
 
- | Ação                                                          |   Atalho                        |   Atalho (macOS)
- | ------------------------------------------------------------- |:------------------------------- |:-----------------------------
- | Alternar para modo de tela cheia                              | `Ctrl`+`f`                      | `Cmd`+`f`
- | Redimensionar janela para pixel-perfect(Escala 1:1)           | `Ctrl`+`g`                      | `Cmd`+`g`
- | Redimensionar janela para tirar as bordas pretas              | `Ctrl`+`x` \| _Clique-duplo¹_   | `Cmd`+`x`  \| _Clique-duplo¹_
- | Clicar em `HOME`                                              | `Ctrl`+`h` \| _Clique-central_  | `Ctrl`+`h` \| _Clique-central_
- | Clicar em `BACK`                                              | `Ctrl`+`b` \| _Clique-direito²_ | `Cmd`+`b`  \| _Clique-direito²_
- | Clicar em `APP_SWITCH`                                        | `Ctrl`+`s`                      | `Cmd`+`s`
- | Clicar em `MENU`                                              | `Ctrl`+`m`                      | `Ctrl`+`m`
- | Clicar em `VOLUME_UP`                                         | `Ctrl`+`↑` _(cima)_             | `Cmd`+`↑` _(cima)_
- | Clicar em `VOLUME_DOWN`                                       | `Ctrl`+`↓` _(baixo)_            | `Cmd`+`↓` _(baixo)_
- | Clicar em `POWER`                                             | `Ctrl`+`p`                      | `Cmd`+`p`
- | Ligar                                                         | _Clique-direito²_               | _Clique-direito²_
- | Desligar a tela do dispositivo                                | `Ctrl`+`o`                      | `Cmd`+`o`
- | Rotacionar tela do dispositivo                                | `Ctrl`+`r`                      | `Cmd`+`r`
- | Expandir painel de notificação                                | `Ctrl`+`n`                      | `Cmd`+`n`
- | Esconder painel de notificação                                | `Ctrl`+`Shift`+`n`              | `Cmd`+`Shift`+`n`
- | Copiar área de transferência do dispositivo para o computador | `Ctrl`+`c`                      | `Cmd`+`c`
- | Colar área de transferência do computador para o dispositivo  | `Ctrl`+`v`                      | `Cmd`+`v`
- | Copiar área de transferência do computador para dispositivo   | `Ctrl`+`Shift`+`v`              | `Cmd`+`Shift`+`v`
- | Ativar/desativar contador de FPS(Frames por segundo)          | `Ctrl`+`i`                      | `Cmd`+`i`
+Na lista a seguir, <kbd>MOD</kbd> é o modificador de atalho. Por padrão, é
+<kbd>Alt</kbd> (esquerdo) ou <kbd>Super</kbd> (esquerdo).
+
+Ele pode ser mudado usando `--shortcut-mod`. Possíveis teclas são `lctrl`, `rctrl`,
+`lalt`, `ralt`, `lsuper` e `rsuper`. Por exemplo:
+
+```bash
+# usar RCtrl para atalhos
+scrcpy --shortcut-mod=rctrl
+
+# usar tanto LCtrl+LAlt quanto LSuper para atalhos
+scrcpy --shortcut-mod=lctrl+lalt,lsuper
+```
+
+_<kbd>[Super]</kbd> é tipicamente a tecla <kbd>Windows</kbd> ou <kbd>Cmd</kbd>._
+
+[Super]: https://en.wikipedia.org/wiki/Super_key_(keyboard_button)
+
+ | Ação                                        |   Atalho
+ | ------------------------------------------- |:-----------------------------
+ | Mudar modo de tela cheia                    | <kbd>MOD</kbd>+<kbd>f</kbd>
+ | Rotacionar display para esquerda            | <kbd>MOD</kbd>+<kbd>←</kbd> _(esquerda)_
+ | Rotacionar display para direita             | <kbd>MOD</kbd>+<kbd>→</kbd> _(direita)_
+ | Redimensionar janela para 1:1 (pixel-perfect) | <kbd>MOD</kbd>+<kbd>g</kbd>
+ | Redimensionar janela para remover bordas pretas | <kbd>MOD</kbd>+<kbd>w</kbd> \| _Clique-duplo¹_
+ | Clicar em `HOME`                            | <kbd>MOD</kbd>+<kbd>h</kbd> \| _Clique-do-meio_
+ | Clicar em `BACK`                            | <kbd>MOD</kbd>+<kbd>b</kbd> \| _Clique-direito²_
+ | Clicar em `APP_SWITCH`                      | <kbd>MOD</kbd>+<kbd>s</kbd>
+ | Clicar em `MENU` (desbloquear tela          | <kbd>MOD</kbd>+<kbd>m</kbd>
+ | Clicar em `VOLUME_UP`                       | <kbd>MOD</kbd>+<kbd>↑</kbd> _(cima)_
+ | Clicar em `VOLUME_DOWN`                     | <kbd>MOD</kbd>+<kbd>↓</kbd> _(baixo)_
+ | Clicar em `POWER`                           | <kbd>MOD</kbd>+<kbd>p</kbd>
+ | Ligar                                       | _Clique-direito²_
+ | Desligar tela do dispositivo (continuar espelhando) | <kbd>MOD</kbd>+<kbd>o</kbd>
+ | Ligar tela do dispositivo                   | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>o</kbd>
+ | Rotacionar tela do dispositivo              | <kbd>MOD</kbd>+<kbd>r</kbd>
+ | Expandir painel de notificação              | <kbd>MOD</kbd>+<kbd>n</kbd>
+ | Colapsar painel de notificação              | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>n</kbd>
+ | Copiar para área de transferência³          | <kbd>MOD</kbd>+<kbd>c</kbd>
+ | Recortar para área de transferência³        | <kbd>MOD</kbd>+<kbd>x</kbd>
+ | Sincronizar áreas de transferência e colar³ | <kbd>MOD</kbd>+<kbd>v</kbd>
+ | Injetar texto da área de transferência do computador | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd>
+ | Ativar/desativar contador de FPS (em stdout) | <kbd>MOD</kbd>+<kbd>i</kbd>
+ | Pinçar para dar zoom                        | <kbd>Ctrl</kbd>+_clicar-e-mover_
 
 _¹Clique-duplo em bordas pretas para removê-las._  
-_²Botão direito liga a tela se ela estiver desligada, clique BACK para o contrário._
+_²Clique-direito liga a tela se ela estiver desligada, pressiona BACK caso contrário._
+_³Apenas em Android >= 7._
+
+Todos os atalhos <kbd>Ctrl</kbd>+_tecla_ são encaminhados para o dispositivo, para que eles sejam
+tratados pela aplicação ativa.
 
 
 ## Caminhos personalizados
 
-Para usar um binário específico _adb_, configure seu caminho na variável de ambiente `ADB`:
+Para usar um binário _adb_ específico, configure seu caminho na variável de ambiente
+`ADB`:
 
     ADB=/caminho/para/adb scrcpy
 
@@ -478,7 +739,7 @@ Para sobrepor o caminho do arquivo `scrcpy-server`, configure seu caminho em
 
 ## Por quê _scrcpy_?
 
-Um colega me desafiou a encontrar um nome impronunciável como [gnirehtet].
+Um colega me desafiou a encontrar um nome tão impronunciável quanto [gnirehtet].
 
 [`strcpy`] copia uma **str**ing; `scrcpy` copia uma **scr**een.
 
@@ -495,12 +756,12 @@ Veja [BUILD].
 
 ## Problemas comuns
 
-Veja [FAQ](FAQ.md).
+Veja o [FAQ](FAQ.md).
 
 
 ## Desenvolvedores
 
-Leia a  [developers page].
+Leia a [página dos desenvolvedores][developers page].
 
 [developers page]: DEVELOP.md
 

README.sp.md

@@ -0,0 +1,743 @@
+Solo se garantiza que el archivo [README](README.md) original esté actualizado.
+
+# scrcpy (v1.17)
+
+Esta aplicación proporciona imagen y control de un dispositivo Android conectado
+por USB (o [por TCP/IP][article-tcpip]). No requiere acceso _root_.
+Compatible con _GNU/Linux_, _Windows_ y _macOS_.
+
+![screenshot](assets/screenshot-debian-600.jpg)
+
+Sus características principales son:
+
+ - **ligero** (nativo, solo muestra la imagen del dispositivo)
+ - **desempeño** (30~60fps)
+ - **calidad** (1920×1080 o superior)
+ - **baja latencia** ([35~70ms][lowlatency])
+ - **corto tiempo de inicio** (~1 segundo para mostrar la primera imagen)
+ - **no intrusivo** (no se deja nada instalado en el dispositivo)
+
+[lowlatency]: https://github.com/Genymobile/scrcpy/pull/646
+
+
+## Requisitos
+
+El dispositivo Android requiere como mínimo API 21 (Android 5.0).
+
+Asegurate de [habilitar el adb debugging][enable-adb] en tu(s) dispositivo(s).
+
+[enable-adb]: https://developer.android.com/studio/command-line/adb.html#Enabling
+
+En algunos dispositivos, también necesitas habilitar [una opción adicional][control] para controlarlo con el teclado y ratón.
+
+[control]: https://github.com/Genymobile/scrcpy/issues/70#issuecomment-373286323
+
+
+## Consigue la app
+
+<a href="https://repology.org/project/scrcpy/versions"><img src="https://repology.org/badge/vertical-allrepos/scrcpy.svg" alt="Packaging status" align="right"></a>
+
+### Resumen
+
+ - Linux: `apt install scrcpy`
+ - Windows: [download](README.md#windows)
+ - macOS: `brew install scrcpy`
+
+Construir desde la fuente: [BUILD] ([proceso simplificado][BUILD_simple])
+
+[BUILD]: BUILD.md
+[BUILD_simple]: BUILD.md#simple
+
+
+### Linux
+
+En Debian (_test_ y _sid_ por ahora) y Ubuntu (20.04):
+
+```
+apt install scrcpy
+```
+
+Hay un paquete [Snap]: [`scrcpy`][snap-link].
+
+[snap-link]: https://snapstats.org/snaps/scrcpy
+
+[snap]: https://en.wikipedia.org/wiki/Snappy_(package_manager)
+
+Para Fedora, hay un paquete [COPR]: [`scrcpy`][copr-link].
+
+[COPR]: https://fedoraproject.org/wiki/Category:Copr
+[copr-link]: https://copr.fedorainfracloud.org/coprs/zeno/scrcpy/
+
+Para Arch Linux, hay un paquete [AUR]: [`scrcpy`][aur-link].
+
+[AUR]: https://wiki.archlinux.org/index.php/Arch_User_Repository
+[aur-link]: https://aur.archlinux.org/packages/scrcpy/
+
+Para Gentoo, hay un paquete [Ebuild]: [`scrcpy/`][ebuild-link].
+
+[Ebuild]: https://wiki.gentoo.org/wiki/Ebuild
+[ebuild-link]: https://github.com/maggu2810/maggu2810-overlay/tree/master/app-mobilephone/scrcpy
+
+También puedes [construir la aplicación manualmente][BUILD] ([proceso simplificado][BUILD_simple]).
+
+
+### Windows
+
+Para Windows, por simplicidad, hay un pre-compilado con todas las dependencias
+(incluyendo `adb`):
+
+ - [README](README.md#windows)
+
+También está disponible en [Chocolatey]:
+
+[Chocolatey]: https://chocolatey.org/
+
+```bash
+choco install scrcpy
+choco install adb    # si aún no está instalado
+```
+
+Y en [Scoop]:
+
+```bash
+scoop install scrcpy
+scoop install adb    # si aún no está instalado
+```
+
+[Scoop]: https://scoop.sh
+
+También puedes [construir la aplicación manualmente][BUILD].
+
+
+### macOS
+
+La aplicación está disponible en [Homebrew]. Solo instalala:
+
+[Homebrew]: https://brew.sh/
+
+```bash
+brew install scrcpy
+```
+
+Necesitarás `adb`, accesible desde `PATH`. Si aún no lo tienes:
+
+```bash
+brew install android-platform-tools
+```
+
+También está disponible en [MacPorts], que configurará el adb automáticamente:
+
+```bash
+sudo port install scrcpy
+```
+
+[MacPorts]: https://www.macports.org/
+
+
+También puedes [construir la aplicación manualmente][BUILD].
+
+
+## Ejecutar
+
+Enchufa el dispositivo Android, y ejecuta:
+
+```bash
+scrcpy
+```
+
+Acepta argumentos desde la línea de comandos, listados en:
+
+```bash
+scrcpy --help
+```
+
+## Características
+
+### Capturar configuración
+
+#### Reducir la definición
+
+A veces es útil reducir la definición de la imagen del dispositivo Android para aumentar el desempeño.
+
+Para limitar el ancho y la altura a un valor específico (ej. 1024):
+
+```bash
+scrcpy --max-size 1024
+scrcpy -m 1024  # versión breve
+```
+
+La otra dimensión es calculada para conservar el aspect ratio del dispositivo.
+De esta forma, un dispositivo en 1920×1080 será transmitido a 1024×576.
+
+
+#### Cambiar el bit-rate
+
+El bit-rate por defecto es 8 Mbps. Para cambiar el bit-rate del video (ej. a 2 Mbps):
+
+```bash
+scrcpy --bit-rate 2M
+scrcpy -b 2M  # versión breve
+```
+
+#### Limitar los fps
+
+El fps puede ser limitado:
+
+```bash
+scrcpy --max-fps 15
+```
+
+Es oficialmente soportado desde Android 10, pero puede funcionar en versiones anteriores.
+
+#### Recortar
+
+La imagen del dispositivo puede ser recortada para transmitir solo una parte de la pantalla.
+
+Por ejemplo, puede ser útil para transmitir la imagen de un solo ojo del Oculus Go:
+
+```bash
+scrcpy --crop 1224:1440:0:0   # 1224x1440 con coordenadas de origen en (0,0)
+```
+
+Si `--max-size` también está especificado, el cambio de tamaño es aplicado después de cortar.
+
+
+#### Fijar la rotación del video
+
+
+Para fijar la rotación de la transmisión:
+
+```bash
+scrcpy --lock-video-orientation 0   # orientación normal
+scrcpy --lock-video-orientation 1   # 90° contrarreloj
+scrcpy --lock-video-orientation 2   # 180°
+scrcpy --lock-video-orientation 3   # 90° sentido de las agujas del reloj
+```
+
+Esto afecta la rotación de la grabación.
+
+La [ventana también puede ser rotada](#rotación) independientemente.
+
+
+#### Codificador
+
+Algunos dispositivos pueden tener más de una rotación, y algunos pueden causar problemas o errores. Es posible seleccionar un codificador diferente:
+
+```bash
+scrcpy --encoder OMX.qcom.video.encoder.avc
+```
+
+Para listar los codificadores disponibles, puedes pasar un nombre de codificador inválido, el error te dará los codificadores disponibles:
+
+```bash
+scrcpy --encoder _
+```
+
+### Grabación
+
+Es posible grabar la pantalla mientras se transmite:
+
+```bash
+scrcpy --record file.mp4
+scrcpy -r file.mkv
+```
+
+Para grabar sin transmitir la pantalla:
+
+```bash
+scrcpy --no-display --record file.mp4
+scrcpy -Nr file.mkv
+# interrumpe la grabación con Ctrl+C
+```
+
+"Skipped frames" son grabados, incluso si no son mostrados en tiempo real (por razones de desempeño). Los frames tienen _marcas de tiempo_ en el dispositivo, por lo que el "[packet delay
+variation]" no impacta el archivo grabado.
+
+[packet delay variation]: https://en.wikipedia.org/wiki/Packet_delay_variation
+
+
+### Conexión
+
+#### Inalámbrica
+
+_Scrcpy_ usa `adb` para comunicarse con el dispositivo, y `adb` puede [conectarse] vía TCP/IP:
+
+1. Conecta el dispositivo al mismo Wi-Fi que tu computadora.
+2. Obtén la dirección IP del dispositivo, en Ajustes → Acerca del dispositivo → Estado, o ejecutando este comando:
+
+    ```bash
+    adb shell ip route | awk '{print $9}'
+    ```
+
+3. Habilita adb vía TCP/IP en el dispositivo: `adb tcpip 5555`.
+4. Desenchufa el dispositivo.
+5. Conéctate a tu dispositivo: `adb connect IP_DEL_DISPOSITIVO:5555` _(reemplaza `IP_DEL_DISPOSITIVO`)_.
+6. Ejecuta `scrcpy` con normalidad.
+
+Podría resultar útil reducir el bit-rate y la definición:
+
+```bash
+scrcpy --bit-rate 2M --max-size 800
+scrcpy -b2M -m800  # versión breve
+```
+
+[conectarse]: https://developer.android.com/studio/command-line/adb.html#wireless
+
+
+#### Múltiples dispositivos
+
+Si hay muchos dispositivos listados en `adb devices`, será necesario especificar el _número de serie_:
+
+```bash
+scrcpy --serial 0123456789abcdef
+scrcpy -s 0123456789abcdef  # versión breve
+```
+
+Si el dispositivo está conectado por TCP/IP:
+
+```bash
+scrcpy --serial 192.168.0.1:5555
+scrcpy -s 192.168.0.1:5555  # versión breve
+```
+
+Puedes iniciar múltiples instancias de _scrcpy_ para múltiples dispositivos.
+
+#### Autoiniciar al detectar dispositivo
+
+Puedes utilizar [AutoAdb]:
+
+```bash
+autoadb scrcpy -s '{}'
+```
+
+[AutoAdb]: https://github.com/rom1v/autoadb
+
+#### Túnel SSH
+
+Para conectarse a un dispositivo remoto, es posible conectar un cliente local de `adb` a un servidor remoto `adb` (siempre y cuando utilicen la misma versión de protocolos _adb_):
+
+```bash
+adb kill-server    # cierra el servidor local adb en 5037
+ssh -CN -L5037:localhost:5037 -R27183:localhost:27183 your_remote_computer
+# conserva este servidor abierto
+```
+
+Desde otra terminal:
+
+```bash
+scrcpy
+```
+
+Para evitar habilitar "remote port forwarding", puedes forzar una "forward connection" (nótese el argumento `-L` en vez de `-R`):
+
+```bash
+adb kill-server    # cierra el servidor local adb en 5037
+ssh -CN -L5037:localhost:5037 -L27183:localhost:27183 your_remote_computer
+# conserva este servidor abierto
+```
+
+Desde otra terminal:
+
+```bash
+scrcpy --force-adb-forward
+```
+
+
+Al igual que las conexiones inalámbricas, puede resultar útil reducir la calidad:
+
+```
+scrcpy -b2M -m800 --max-fps 15
+```
+
+### Configuración de la ventana
+
+#### Título
+
+Por defecto, el título de la ventana es el modelo del dispositivo. Puede ser modificado:
+
+```bash
+scrcpy --window-title 'My device'
+```
+
+#### Posición y tamaño
+
+La posición y tamaño inicial de la ventana puede ser especificado:
+
+```bash
+scrcpy --window-x 100 --window-y 100 --window-width 800 --window-height 600
+```
+
+#### Sin bordes
+
+Para deshabilitar el diseño de la ventana:
+
+```bash
+scrcpy --window-borderless
+```
+
+#### Siempre adelante
+
+Para mantener la ventana de scrcpy siempre adelante:
+
+```bash
+scrcpy --always-on-top
+```
+
+#### Pantalla completa
+
+La aplicación puede ser iniciada en pantalla completa:
+
+```bash
+scrcpy --fullscreen
+scrcpy -f  # versión breve
+```
+
+Puede entrar y salir de la pantalla completa con la combinación <kbd>MOD</kbd>+<kbd>f</kbd>.
+
+#### Rotación
+
+Se puede rotar la ventana:
+
+```bash
+scrcpy --rotation 1
+```
+
+Los valores posibles son:
+ - `0`: sin rotación
+ - `1`: 90 grados contrarreloj
+ - `2`: 180 grados
+ - `3`: 90 grados en sentido de las agujas del reloj
+
+La rotación también puede ser modificada con la combinación de teclas <kbd>MOD</kbd>+<kbd>←</kbd> _(izquierda)_ y <kbd>MOD</kbd>+<kbd>→</kbd> _(derecha)_.
+
+Nótese que _scrcpy_ maneja 3 diferentes rotaciones:
+ - <kbd>MOD</kbd>+<kbd>r</kbd> solicita al dispositivo cambiar entre vertical y horizontal (la aplicación en uso puede rechazarlo si no soporta la orientación solicitada).
+ - [`--lock-video-orientation`](#fijar-la-rotación-del-video) cambia la rotación de la transmisión (la orientación del video enviado a la PC). Esto afecta a la grabación.
+ - `--rotation` (o <kbd>MOD</kbd>+<kbd>←</kbd>/<kbd>MOD</kbd>+<kbd>→</kbd>) rota solo el contenido de la imagen. Esto solo afecta a la imagen mostrada, no a la grabación.
+
+
+### Otras opciones menores
+
+#### Solo lectura ("Read-only")
+
+Para deshabilitar los controles (todo lo que interactúe con el dispositivo: eventos del teclado, eventos del mouse, arrastrar y soltar archivos):
+
+```bash
+scrcpy --no-control
+scrcpy -n  # versión breve
+```
+
+#### Pantalla
+
+Si múltiples pantallas están disponibles, es posible elegir cual transmitir:
+
+```bash
+scrcpy --display 1
+```
+
+Los ids de las pantallas se pueden obtener con el siguiente comando:
+
+```bash
+adb shell dumpsys display   # busque "mDisplayId=" en la respuesta
+```
+
+La segunda pantalla solo puede ser manejada si el dispositivo cuenta con Android 10 (en caso contrario será transmitida en el modo solo lectura).
+
+
+#### Permanecer activo
+
+Para evitar que el dispositivo descanse después de un tiempo mientras está conectado:
+
+```bash
+scrcpy --stay-awake
+scrcpy -w  # versión breve
+```
+
+La configuración original se restaura al cerrar scrcpy.
+
+
+#### Apagar la pantalla
+
+Es posible apagar la pantalla mientras se transmite al iniciar con el siguiente comando:
+
+```bash
+scrcpy --turn-screen-off
+scrcpy -S  # versión breve
+```
+
+O presionando <kbd>MOD</kbd>+<kbd>o</kbd> en cualquier momento.
+
+Para volver a prenderla, presione <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>o</kbd>.
+
+En Android, el botón de `POWER` siempre prende la pantalla. Por conveniencia, si `POWER` es enviado vía scrcpy (con click-derecho o <kbd>MOD</kbd>+<kbd>p</kbd>), esto forzará a apagar la pantalla con un poco de atraso (en la mejor de las situaciones). El botón físico `POWER` seguirá prendiendo la pantalla.
+
+También puede resultar útil para evitar que el dispositivo entre en inactividad:
+
+```bash
+scrcpy --turn-screen-off --stay-awake
+scrcpy -Sw  # versión breve
+```
+
+
+#### Renderizar frames vencidos
+
+Por defecto, para minimizar la latencia, _scrcpy_ siempre renderiza el último frame disponible decodificado, e ignora cualquier frame anterior.
+
+Para forzar el renderizado de todos los frames (a costo de posible aumento de latencia), use:
+
+```bash
+scrcpy --render-expired-frames
+```
+
+#### Mostrar clicks
+
+Para presentaciones, puede resultar útil mostrar los clicks físicos (en el dispositivo físicamente).
+
+Android provee esta opción en _Opciones para desarrolladores_.
+
+_Scrcpy_ provee una opción para habilitar esta función al iniciar la aplicación y restaurar el valor original al salir:
+
+```bash
+scrcpy --show-touches
+scrcpy -t  # versión breve
+```
+
+Nótese que solo muestra los clicks _físicos_ (con el dedo en el dispositivo).
+
+
+#### Desactivar protector de pantalla
+
+Por defecto, scrcpy no evita que el protector de pantalla se active en la computadora.
+
+Para deshabilitarlo:
+
+```bash
+scrcpy --disable-screensaver
+```
+
+
+### Control
+
+#### Rotar pantalla del dispositivo
+
+Presione <kbd>MOD</kbd>+<kbd>r</kbd> para cambiar entre posición vertical y horizontal.
+
+Nótese que solo rotará si la aplicación activa soporta la orientación solicitada.
+
+#### Copiar y pegar
+
+Cuando que el portapapeles de Android cambia, automáticamente se sincroniza al portapapeles de la computadora.
+
+Cualquier shortcut con <kbd>Ctrl</kbd> es enviado al dispositivo. En particular:
+ - <kbd>Ctrl</kbd>+<kbd>c</kbd> normalmente copia
+ - <kbd>Ctrl</kbd>+<kbd>x</kbd> normalmente corta
+ - <kbd>Ctrl</kbd>+<kbd>v</kbd> normalmente pega (después de la sincronización de portapapeles entre la computadora y el dispositivo)
+
+Esto normalmente funciona como es esperado.
+
+Sin embargo, este comportamiento depende de la aplicación en uso. Por ejemplo, _Termux_ envía SIGINT con <kbd>Ctrl</kbd>+<kbd>c</kbd>, y _K-9 Mail_ crea un nuevo mensaje.
+
+Para copiar, cortar y pegar, en tales casos (solo soportado en Android >= 7):
+ - <kbd>MOD</kbd>+<kbd>c</kbd> inyecta `COPY`
+ - <kbd>MOD</kbd>+<kbd>x</kbd> inyecta `CUT`
+ - <kbd>MOD</kbd>+<kbd>v</kbd> inyecta `PASTE` (después de la sincronización de portapapeles entre la computadora y el dispositivo)
+
+Además, <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd> permite inyectar el texto en el portapapeles de la computadora como una secuencia de teclas. Esto es útil cuando el componente no acepta pegado de texto (por ejemplo en _Termux_), pero puede romper caracteres no pertenecientes a ASCII.
+
+**AVISO:** Pegar de la computadora al dispositivo (tanto con <kbd>Ctrl</kbd>+<kbd>v</kbd> o <kbd>MOD</kbd>+<kbd>v</kbd>) copia el contenido al portapapeles del dispositivo. Como consecuencia, cualquier aplicación de Android puede leer su contenido. Debería evitar pegar contenido sensible (como contraseñas) de esta forma.
+
+Algunos dispositivos no se comportan como es esperado al establecer el portapapeles programáticamente. La opción `--legacy-paste` está disponible para cambiar el comportamiento de <kbd>Ctrl</kbd>+<kbd>v</kbd> y <kbd>MOD</kbd>+<kbd>v</kbd> para que también inyecten el texto del portapapeles de la computadora como una secuencia de teclas (de la misma forma que <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd>).
+
+#### Pellizcar para zoom
+
+Para simular "pinch-to-zoom": <kbd>Ctrl</kbd>+_click-y-mover_.
+
+Más precisamente, mantén <kbd>Ctrl</kbd> mientras presionas botón izquierdo. Hasta que no se suelte el botón, todos los movimientos del mouse cambiarán el tamaño y rotación del contenido (si es soportado por la app en uso) respecto al centro de la pantalla.
+
+Concretamente, scrcpy genera clicks adicionales con un "dedo virtual" en la posición invertida respecto al centro de la pantalla.
+
+
+#### Preferencias de inyección de texto
+
+Existen dos tipos de [eventos][textevents] generados al escribir texto:
+ - _key events_, marcando si la tecla es presionada o soltada;
+ - _text events_, marcando si un texto fue introducido.
+
+Por defecto, las letras son inyectadas usando _key events_, para que el teclado funcione como es esperado en juegos (típicamente las teclas WASD).
+
+Pero esto puede [causar problemas][prefertext]. Si encuentras tales problemas, los puedes evitar con:
+
+```bash
+scrcpy --prefer-text
+```
+
+(Pero esto romperá el comportamiento del teclado en los juegos)
+
+[textevents]: https://blog.rom1v.com/2018/03/introducing-scrcpy/#handle-text-input
+[prefertext]: https://github.com/Genymobile/scrcpy/issues/650#issuecomment-512945343
+
+
+#### Repetir tecla
+
+Por defecto, mantener una tecla presionada genera múltiples _key events_. Esto puede causar problemas de desempeño en algunos juegos, donde estos eventos no tienen sentido de todos modos.
+
+Para evitar enviar _key events_ repetidos:
+
+```bash
+scrcpy --no-key-repeat
+```
+
+
+#### Botón derecho y botón del medio
+
+Por defecto, botón derecho ejecuta RETROCEDER (o ENCENDIDO) y botón del medio INICIO. Para inhabilitar estos atajos y enviar los clicks al dispositivo:
+
+```bash
+scrcpy --forward-all-clicks
+```
+
+
+### Arrastrar y soltar archivos
+
+#### Instalar APKs
+
+Para instalar un APK, arrastre y suelte el archivo APK (terminado en `.apk`) a la ventana de _scrcpy_.
+
+No hay respuesta visual, un mensaje se escribirá en la consola.
+
+
+#### Enviar archivos al dispositivo
+
+Para enviar un archivo a `/sdcard/` en el dispositivo, arrastre y suelte un archivo (no APK) a la ventana de _scrcpy_.
+
+No hay respuesta visual, un mensaje se escribirá en la consola.
+
+El directorio de destino puede ser modificado al iniciar:
+
+```bash
+scrcpy --push-target=/sdcard/Download/
+```
+
+
+### Envío de Audio
+
+_Scrcpy_ no envía el audio. Use [sndcpy].
+
+También lea [issue #14].
+
+[sndcpy]: https://github.com/rom1v/sndcpy
+[issue #14]: https://github.com/Genymobile/scrcpy/issues/14
+
+
+## Atajos
+
+En la siguiente lista, <kbd>MOD</kbd> es el atajo modificador. Por defecto es <kbd>Alt</kbd> (izquierdo) o <kbd>Super</kbd> (izquierdo).
+
+Se puede modificar usando `--shortcut-mod`. Las posibles teclas son `lctrl` (izquierdo), `rctrl` (derecho), `lalt` (izquierdo), `ralt` (derecho), `lsuper` (izquierdo) y `rsuper` (derecho). Por ejemplo:
+
+```bash
+# use RCtrl para los atajos
+scrcpy --shortcut-mod=rctrl
+
+# use tanto LCtrl+LAlt o LSuper para los atajos
+scrcpy --shortcut-mod=lctrl+lalt,lsuper
+```
+
+_<kbd>[Super]</kbd> es generalmente la tecla <kbd>Windows</kbd> o <kbd>Cmd</kbd>._
+
+[Super]: https://en.wikipedia.org/wiki/Super_key_(keyboard_button)
+
+ | Acción                                      |   Atajo
+ | ------------------------------------------- |:-----------------------------
+ | Alterne entre pantalla compelta             | <kbd>MOD</kbd>+<kbd>f</kbd>
+ | Rotar pantalla hacia la izquierda           | <kbd>MOD</kbd>+<kbd>←</kbd> _(izquierda)_
+ | Rotar pantalla hacia la derecha             | <kbd>MOD</kbd>+<kbd>→</kbd> _(derecha)_
+ | Ajustar ventana a 1:1 ("pixel-perfect")     | <kbd>MOD</kbd>+<kbd>g</kbd>
+ | Ajustar ventana para quitar los bordes negros| <kbd>MOD</kbd>+<kbd>w</kbd> \| _Doble click¹_
+ | Click en `INICIO`                           | <kbd>MOD</kbd>+<kbd>h</kbd> \| _Botón del medio_
+ | Click en `RETROCEDER`                       | <kbd>MOD</kbd>+<kbd>b</kbd> \| _Botón derecho²_
+ | Click en `CAMBIAR APLICACIÓN`               | <kbd>MOD</kbd>+<kbd>s</kbd>
+ | Click en `MENÚ` (desbloquear pantalla)      | <kbd>MOD</kbd>+<kbd>m</kbd>
+ | Click en `SUBIR VOLUMEN`                    | <kbd>MOD</kbd>+<kbd>↑</kbd> _(arriba)_
+ | Click en `BAJAR VOLUME`                     | <kbd>MOD</kbd>+<kbd>↓</kbd> _(abajo)_
+ | Click en `ENCENDIDO`                        | <kbd>MOD</kbd>+<kbd>p</kbd>
+ | Encendido                                   | _Botón derecho²_
+ | Apagar pantalla (manteniendo la transmisión)| <kbd>MOD</kbd>+<kbd>o</kbd>
+ | Encender pantalla                           | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>o</kbd>
+ | Rotar pantalla del dispositivo              | <kbd>MOD</kbd>+<kbd>r</kbd>
+ | Abrir panel de notificaciones               | <kbd>MOD</kbd>+<kbd>n</kbd>
+ | Cerrar panel de notificaciones              | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>n</kbd>
+ | Copiar al portapapeles³                     | <kbd>MOD</kbd>+<kbd>c</kbd>
+ | Cortar al portapapeles³                     | <kbd>MOD</kbd>+<kbd>x</kbd>
+ | Synchronizar portapapeles y pegar³          | <kbd>MOD</kbd>+<kbd>v</kbd>
+ | inyectar texto del portapapeles de la PC    | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd>
+ | Habilitar/Deshabilitar contador de FPS (en stdout)      | <kbd>MOD</kbd>+<kbd>i</kbd>
+ | Pellizcar para zoom                         | <kbd>Ctrl</kbd>+_click-y-mover_
+
+_¹Doble click en los bordes negros para eliminarlos._  
+_²Botón derecho enciende la pantalla si estaba apagada, sino ejecuta RETROCEDER._  
+_³Solo en Android >= 7._
+
+Todos los atajos <kbd>Ctrl</kbd>+_tecla_ son enviados al dispositivo para que sean manejados por la aplicación activa.
+
+
+## Path personalizado
+
+Para usar un binario de _adb_ en particular, configure el path `ADB` en las variables de entorno:
+
+```bash
+ADB=/path/to/adb scrcpy
+```
+
+Para sobreescribir el path del archivo `scrcpy-server`, configure el path en `SCRCPY_SERVER_PATH`.
+
+
+## ¿Por qué _scrcpy_?
+
+Un colega me retó a encontrar un nombre tan impronunciable como [gnirehtet].
+
+[`strcpy`] copia un **str**ing; `scrcpy` copia un **scr**een.
+
+[gnirehtet]: https://github.com/Genymobile/gnirehtet
+[`strcpy`]: http://man7.org/linux/man-pages/man3/strcpy.3.html
+
+
+## ¿Cómo construir (BUILD)?
+
+Véase [BUILD] (en inglés).
+
+
+## Problemas generales
+
+Vea las [preguntas frecuentes (en inglés)](FAQ.md).
+
+
+## Desarrolladores
+
+Lea la [hoja de desarrolladores (en inglés)](DEVELOP.md).
+
+
+## Licencia
+
+    Copyright (C) 2018 Genymobile
+    Copyright (C) 2018-2021 Romain Vimont
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+
+## Artículos
+
+- [Introducing scrcpy][article-intro] (en inglés)
+- [Scrcpy now works wirelessly][article-tcpip] (en inglés)
+
+[article-intro]: https://blog.rom1v.com/2018/03/introducing-scrcpy/
+[article-tcpip]: https://www.genymotion.com/blog/open-source-project-scrcpy-now-works-wirelessly/

README.zh-Hans.md

@@ -2,115 +2,108 @@ _Only the original [README](README.md) is guaranteed to be up-to-date._
 
 只有原版的[README](README.md)会保持最新。
 
-本文根据[479d10d]进行翻译。
+本文根据[ed130e05]进行翻译。
 
-[479d10d]: https://github.com/Genymobile/scrcpy/commit/479d10dc22b70272187e0963c6ad24d754a669a2#diff-04c6e90faac2675aa89e2176d2eec7d8
+[ed130e05]: https://github.com/Genymobile/scrcpy/blob/ed130e05d55615d6014d93f15cfcb92ad62b01d8/README.md
 
+# scrcpy (v1.17)
 
-
-# scrcpy (v1.16)
-
-本应用程序可以通过USB（或 [TCP/IP][article-tcpip] ）连接用于显示或控制安卓设备。这不需要获取 _root_ 权限。
-
-该应用程序可以在 _GNU/Linux_, _Windows_ 和 _macOS_ 环境下运行。
-
-[article-tcpip]:https://www.genymotion.com/blog/open-source-project-scrcpy-now-works-wirelessly/
+本应用程序可以显示并控制通过 USB (或 [TCP/IP][article-tcpip]) 连接的安卓设备，且不需要任何 _root_ 权限。本程序支持 _GNU/Linux_, _Windows_ 和 _macOS_。
 
 ![screenshot](assets/screenshot-debian-600.jpg)
 
 它专注于：
 
- - **轻量** （原生，仅显示设备屏幕）
- - **性能** （30~60fps）
- - **质量** （分辨率可达1920x1080或更高）
- - **低延迟** (35-70ms)
- - **快速启动** （数秒内即能开始显示）
- - **无侵入性** （不需要在安卓设备上安装任何程序）
+ - **轻量** (原生，仅显示设备屏幕)
+ - **性能** (30~60fps)
+ - **质量** (分辨率可达 1920×1080 或更高)
+ - **低延迟** ([35~70ms][lowlatency])
+ - **快速启动** (最快 1 秒内即可显示第一帧)
+ - **无侵入性** (不会在设备上遗留任何程序)
+
+[lowlatency]: https://github.com/Genymobile/scrcpy/pull/646
 
 
-## 使用要求
+## 系统要求
 
-安卓设备系统版本需要在Android 5.0（API 21)或以上。
+安卓设备最低需要支持 API 21 (Android 5.0)。
 
-确保您在设备上开启了[adb调试]。
+确保设备已[开启 adb 调试][enable-adb]。
 
-[adb调试]: https://developer.android.com/studio/command-line/adb.html#Enabling
+[enable-adb]: https://developer.android.com/studio/command-line/adb.html#Enabling
 
-在某些设备上，你还需要开启[额外的选项]以用鼠标和键盘进行控制。
+在某些设备上，还需要开启[额外的选项][control]以使用鼠标和键盘进行控制。
 
-[额外的选项]: https://github.com/Genymobile/scrcpy/issues/70#issuecomment-373286323
+[control]: https://github.com/Genymobile/scrcpy/issues/70#issuecomment-373286323
 
 
-## 获取scrcpy
+## 获取本程序
 
 <a href="https://repology.org/project/scrcpy/versions"><img src="https://repology.org/badge/vertical-allrepos/scrcpy.svg" alt="Packaging status" align="right"></a>
 
 ### Linux
 
-在Debian（目前仅测试版和不稳定版，即 _testing_ 和 _sid_ 版本）和Ubuntu （20.04）上：
+在 Debian (目前仅支持 _testing_ 和 _sid_ 分支) 和Ubuntu (20.04) 上：
 
 ```
 apt install scrcpy
 ```
 
-[Snap]包也是可用的： [`scrcpy`][snap-link].
+我们也提供 [Snap] 包： [`scrcpy`][snap-link]。
 
 [snap-link]: https://snapstats.org/snaps/scrcpy
 
 [snap]: https://en.wikipedia.org/wiki/Snappy_(package_manager)
 
-对于Fedora用户，我们提供[COPR]包： [`scrcpy`][copr-link].
+对 Fedora 我们提供 [COPR] 包： [`scrcpy`][copr-link]。
 
 [COPR]: https://fedoraproject.org/wiki/Category:Copr
 [copr-link]: https://copr.fedorainfracloud.org/coprs/zeno/scrcpy/
 
-对于Arch Linux用户，我们提供[AUR]包： [`scrcpy`][aur-link].
+对 Arch Linux 我们提供 [AUR] 包： [`scrcpy`][aur-link]。
 
 [AUR]: https://wiki.archlinux.org/index.php/Arch_User_Repository
 [aur-link]: https://aur.archlinux.org/packages/scrcpy/
 
-对于Gentoo用户，我们提供[Ebuild]包：[`scrcpy/`][ebuild-link].
+对 Gentoo 我们提供 [Ebuild] 包：[`scrcpy/`][ebuild-link]。
 
 [Ebuild]: https://wiki.gentoo.org/wiki/Ebuild
 [ebuild-link]: https://github.com/maggu2810/maggu2810-overlay/tree/master/app-mobilephone/scrcpy
 
-您也可以[自行编译][编译](不必担心，这并不困难)。
+您也可以[自行构建][BUILD] (不必担心，这并不困难)。
 
 
 
 ### Windows
 
-在Windows上，简便起见，我们准备了包含所有依赖项（包括adb）的程序包。
+在 Windows 上，简便起见，我们提供包含了所有依赖 (包括 `adb`) 的预编译包。
 
- - [`scrcpy-win64-v1.16.zip`][direct-win64]  
-   _(SHA-256: 3f30dc5db1a2f95c2b40a0f5de91ec1642d9f53799250a8c529bc882bc0918f0)_
+ - [README](README.md#windows)
 
-[direct-win64]: https://github.com/Genymobile/scrcpy/releases/download/v1.16/scrcpy-win64-v1.16.zip
-
-您也可以在[Chocolatey]下载：
+也可以使用 [Chocolatey]：
 
 [Chocolatey]: https://chocolatey.org/
 
 ```bash
 choco install scrcpy
-choco install adb    # 如果你没有adb
+choco install adb    # 如果还没有 adb
 ```
 
-也可以使用 [Scoop]:
+或者 [Scoop]:
 
 ```bash
 scoop install scrcpy
-scoop install adb    # 如果你没有adb
+scoop install adb    # 如果还没有 adb
 ```
 
 [Scoop]: https://scoop.sh
 
-您也可以[自行编译][编译]。
+您也可以[自行构建][BUILD]。
 
 
 ### macOS
 
-您可以使用[Homebrew]下载scrcpy。直接安装就可以了：
+本程序已发布到 [Homebrew]。直接安装即可：
 
 [Homebrew]: https://brew.sh/
 
@@ -118,24 +111,28 @@ scoop install adb    # 如果你没有adb
 brew install scrcpy
 ```
 
-您需要 `adb`以使用scrcpy，并且它需要可以通过 `PATH`被访问。如果您没有：
+你还需要在 `PATH` 内有 `adb`。如果还没有：
 
 ```bash
+# Homebrew >= 2.6.0
+brew install --cask android-platform-tools
+
+# Homebrew < 2.6.0
 brew cask install android-platform-tools
 ```
 
-您也可以[自行编译][编译]。
+您也可以[自行构建][BUILD]。
 
 
-## 运行scrcpy
+## 运行
 
-用USB链接电脑和安卓设备，并执行：
+连接安卓设备，然后执行：
 
 ```bash
 scrcpy
 ```
 
-支持带命令行参数执行，查看参数列表：
+本程序支持命令行参数，查看参数列表：
 
 ```bash
 scrcpy --help
@@ -143,111 +140,129 @@ scrcpy --help
 
 ## 功能介绍
 
-### 画面设置
+### 捕获设置
 
-#### 缩小分辨率
+#### 降低分辨率
 
-有时候，将设备屏幕镜像分辨率降低可以有效地提升性能。
+有时候，可以通过降低镜像的分辨率来提高性能。
 
-我们可以将高度和宽度都限制在一定大小内（如 1024）：
+要同时限制宽度和高度到某个值 (例如 1024)：
 
 ```bash
 scrcpy --max-size 1024
-scrcpy -m 1024  # short version
+scrcpy -m 1024  # 简写
 ```
 
-较短的一边会被按比例缩小以保持设备的显示比例。
-这样，1920x1080 的设备会以 1024x576 的分辨率显示。
+另一边会被按比例缩小以保持设备的显示比例。这样，1920×1080 分辨率的设备会以 1024×576 的分辨率进行镜像。
 
 
-#### 修改画面比特率
+#### 修改码率
 
-默认的比特率是8Mbps。如果要改变画面的比特率 (比如说改成2Mbps)：
+默认码率是 8Mbps。要改变视频的码率 (例如改为 2Mbps)：
 
 ```bash
 scrcpy --bit-rate 2M
-scrcpy -b 2M  # short version
+scrcpy -b 2M  # 简写
 ```
 
-#### 限制画面帧率
+#### 限制帧率
 
-画面的帧率可以通过下面的命令被限制：
+要限制捕获的帧率：
 
 ```bash
 scrcpy --max-fps 15
 ```
 
-这个功能仅在Android 10和以后的版本被Android官方支持，但也有可能在更早的版本可用。
+本功能从 Android 10 开始才被官方支持，但在一些旧版本中也能生效。
 
 #### 画面裁剪
 
-设备画面可在裁切后进行镜像，以显示部分屏幕。
+可以对设备屏幕进行裁剪，只镜像屏幕的一部分。
 
-这项功能可以用于，例如，只显示Oculus Go的一只眼睛。
+例如可以只镜像 Oculus Go 的一只眼睛。
 
 ```bash
-scrcpy --crop 1224:1440:0:0   # 1224x1440 at offset (0,0)
+scrcpy --crop 1224:1440:0:0   # 以 (0,0) 为原点的 1224x1440 像素
 ```
 
-如果`--max-size`在同时被指定，分辨率的改变将在画面裁切后进行。
+如果同时指定了 `--max-size`，会先进行裁剪，再进行缩放。
 
 
-#### 锁定屏幕朝向
+#### 锁定屏幕方向
 
 
-可以使用如下命令锁定屏幕朝向：
+要锁定镜像画面的方向：
 
 ```bash
-scrcpy --lock-video-orientation 0   # 自然朝向
-scrcpy --lock-video-orientation 1   # 90° 逆时针旋转
+scrcpy --lock-video-orientation 0   # 自然方向
+scrcpy --lock-video-orientation 1   # 逆时针旋转 90°
 scrcpy --lock-video-orientation 2   # 180°
-scrcpy --lock-video-orientation 3   # 90° 顺时针旋转
+scrcpy --lock-video-orientation 3   # 顺时针旋转 90°
 ```
 
-该设定影响录制。
+只影响录制的方向。
 
+[窗口可以独立旋转](#旋转)。
+
+
+#### 编码器
+
+一些设备内置了多种编码器，但是有的编码器会导致问题或崩溃。可以手动选择其它编码器：
+
+```bash
+scrcpy --encoder OMX.qcom.video.encoder.avc
+```
+
+要列出可用的编码器，可以指定一个不存在的编码器名称，错误信息中会包含所有的编码器：
+
+```bash
+scrcpy --encoder _
+```
 
 ### 屏幕录制
 
-可以在屏幕镜像的同时录制视频：
+可以在镜像的同时录制视频：
 
 ```bash
 scrcpy --record file.mp4
 scrcpy -r file.mkv
 ```
 
-在不开启屏幕镜像的同时录制：
+仅录制，不显示镜像：
 
 ```bash
 scrcpy --no-display --record file.mp4
 scrcpy -Nr file.mkv
-# 按Ctrl+C以停止录制
+# 按 Ctrl+C 停止录制
 ```
 
-在显示中“被跳过的帧”会被录制，虽然它们由于性能原因没有实时显示。
-在传输中每一帧都有 _时间戳_ ，所以 [包时延变化] 并不影响录制的文件。
+录制时会包含“被跳过的帧”，即使它们由于性能原因没有实时显示。设备会为每一帧打上 _时间戳_ ，所以 [包时延抖动][packet delay variation] 不会影响录制的文件。
 
-[包时延变化]: https://en.wikipedia.org/wiki/Packet_delay_variation
+[packet delay variation]: https://en.wikipedia.org/wiki/Packet_delay_variation
 
 
-### 连接方式
+### 连接
 
 #### 无线
 
-_Scrcpy_ 使用`adb`来与安卓设备连接。同时，`adb`能够通过TCP/IP[连接]到安卓设备:
+_Scrcpy_ 使用 `adb` 与设备通信，并且 `adb` 支持通过 TCP/IP [连接]到设备:
 
-1. 将您的安卓设备和电脑连接至同一Wi-Fi。
-2. 获取安卓设备的IP地址（在设置-关于手机-状态信息）。
-3. 打开安卓设备的网络adb功能`adb tcpip 5555`。
-4. 将您的设备与电脑断开连接。
-5. 连接到您的设备：`adb connect DEVICE_IP:5555` _(用设备IP替换 `DEVICE_IP`)_.
-6. 运行`scrcpy`。
+1. 将设备和电脑连接至同一 Wi-Fi。
+2. 打开 设置 → 关于手机 → 状态信息，获取设备的 IP 地址，也可以执行以下的命令：
+    ```bash
+    adb shell ip route | awk '{print $9}'
+    ```
 
-降低比特率和分辨率可能有助于性能：
+3. 启用设备的网络 adb 功能 `adb tcpip 5555`。
+4. 断开设备的 USB 连接。
+5. 连接到您的设备：`adb connect DEVICE_IP:5555` _(将 `DEVICE_IP` 替换为设备 IP)_.
+6. 正常运行 `scrcpy`。
+
+可能需要降低码率和分辨率：
 
 ```bash
 scrcpy --bit-rate 2M --max-size 800
-scrcpy -b2M -m800  # short version
+scrcpy -b2M -m800  # 简写
 ```
 
 [连接]: https://developer.android.com/studio/command-line/adb.html#wireless
@@ -255,18 +270,18 @@ scrcpy -b2M -m800  # short version
 
 #### 多设备
 
-如果多个设备在执行`adb devices`后被列出，您必须指定设备的 _序列号_ ：
+如果 `adb devices` 列出了多个设备，您必须指定设备的 _序列号_ ：
 
 ```bash
 scrcpy --serial 0123456789abcdef
-scrcpy -s 0123456789abcdef  # short version
+scrcpy -s 0123456789abcdef  # 简写
 ```
 
-如果设备是通过TCP/IP方式连接到电脑的：
+如果设备通过 TCP/IP 连接：
 
 ```bash
 scrcpy --serial 192.168.0.1:5555
-scrcpy -s 192.168.0.1:5555  # short version
+scrcpy -s 192.168.0.1:5555  # 简写
 ```
 
 您可以同时启动多个 _scrcpy_ 实例以同时显示多个设备的画面。
@@ -281,38 +296,38 @@ autoadb scrcpy -s '{}'
 
 [AutoAdb]: https://github.com/rom1v/autoadb
 
-#### SSH 连接
+#### SSH 隧道
 
-本地的 adb 可以远程连接到另一个 adb 服务器（假设两者的adb版本相同），来远程连接到设备：
+要远程连接到设备，可以将本地的 adb 客户端连接到远程的 adb 服务端 (需要两端的 _adb_ 协议版本相同)：
 
 ```bash
-adb kill-server    # 关闭本地5037端口上的adb服务器
+adb kill-server    # 关闭本地 5037 端口上的 adb 服务端
 ssh -CN -L5037:localhost:5037 -R27183:localhost:27183 your_remote_computer
 # 保持该窗口开启
 ```
 
-从另一个终端：
+在另一个终端：
 
 ```bash
 scrcpy
 ```
 
-为了避免启动远程端口转发，你可以强制启动一个转发连接（注意`-L`和`-R`的区别：
+若要不使用远程端口转发，可以强制使用正向连接 (注意 `-L` 和 `-R` 的区别)：
 
 ```bash
-adb kill-server    # kill the local adb server on 5037
+adb kill-server    # 关闭本地 5037 端口上的 adb 服务端
 ssh -CN -L5037:localhost:5037 -L27183:localhost:27183 your_remote_computer
 # 保持该窗口开启
 ```
 
-从另一个终端:
+在另一个终端:
 
 ```bash
 scrcpy --force-adb-forward
 ```
 
 
-和无线网络连接类似，下列设置可能对改善性能有帮助：
+类似无线网络连接，可能需要降低画面质量：
 
 ```
 scrcpy -b2M -m800 --max-fps 15
@@ -322,7 +337,7 @@ scrcpy -b2M -m800 --max-fps 15
 
 #### 标题
 
-窗口的标题默认为设备型号。您可以通过如下命令修改它：
+窗口的标题默认为设备型号。可以通过如下命令修改：
 
 ```bash
 scrcpy --window-title 'My device'
@@ -358,14 +373,14 @@ scrcpy --always-on-top
 
 ```bash
 scrcpy --fullscreen
-scrcpy -f  # short version
+scrcpy -f  # 简写
 ```
 
-全屏状态可以通过<kbd>MOD</kbd>+<kbd>f</kbd>实时改变。
+全屏状态可以通过 <kbd>MOD</kbd>+<kbd>f</kbd> 随时切换。
 
 #### 旋转
 
-通过如下命令，窗口可以旋转：
+可以通过以下命令旋转窗口：
 
 ```bash
 scrcpy --rotation 1
@@ -373,27 +388,23 @@ scrcpy --rotation 1
 
 可选的值有：
  - `0`: 无旋转
- - `1`: 逆时针旋转90°
- - `2`: 旋转180°
- - `3`: 顺时针旋转90°
+ - `1`: 逆时针旋转 90°
+ - `2`: 旋转 180°
+ - `3`: 顺时针旋转 90°
 
-这同样可以使用<kbd>MOD</kbd>+<kbd>←</kbd>
-_(左)_ 和 <kbd>MOD</kbd>+<kbd>→</kbd> _(右)_ 的快捷键实时更改。
+也可以使用 <kbd>MOD</kbd>+<kbd>←</kbd> _(左箭头)_ 和 <kbd>MOD</kbd>+<kbd>→</kbd> _(右箭头)_ 随时更改。
 
-需要注意的是， _scrcpy_ 控制三个不同的朝向：
- - <kbd>MOD</kbd>+<kbd>r</kbd> 请求设备在竖屏和横屏之间切换（如果前台应用程序不支持所请求的朝向，可能会拒绝该请求）。
-
- - `--lock-video-orientation` 改变镜像的朝向（设备镜像到电脑的画面朝向）。这会影响录制。
-
- - `--rotation` （或<kbd>MOD</kbd>+<kbd>←</kbd>/<kbd>MOD</kbd>+<kbd>→</kbd>）
-   只旋转窗口的画面。这只影响显示，不影响录制。
+需要注意的是， _scrcpy_ 有三个不同的方向：
+ - <kbd>MOD</kbd>+<kbd>r</kbd> 请求设备在竖屏和横屏之间切换 (如果前台应用程序不支持请求的朝向，可能会拒绝该请求)。
+ - [`--lock-video-orientation`](#锁定屏幕方向) 改变镜像的朝向 (设备传输到电脑的画面的朝向)。这会影响录制。
+ - `--rotation` (或 <kbd>MOD</kbd>+<kbd>←</kbd>/<kbd>MOD</kbd>+<kbd>→</kbd>) 只旋转窗口的内容。这只影响显示，不影响录制。
 
 
 ### 其他镜像设置
 
 #### 只读
 
-关闭电脑对设备的控制（如键盘输入、鼠标移动和文件传输）：
+禁用电脑对设备的控制 (如键盘输入、鼠标事件和文件拖放)：
 
 ```bash
 scrcpy --no-control
@@ -402,53 +413,49 @@ scrcpy -n
 
 #### 显示屏
 
-如果有多个显示屏可用，您可以选择特定显示屏进行镜像：
+如果设备有多个显示屏，可以选择要镜像的显示屏：
 
 ```bash
 scrcpy --display 1
 ```
 
-您可以通过如下命令找到显示屏的id：
+可以通过如下命令列出所有显示屏的 id：
 
 ```
-adb shell dumpsys display   # 在回显中搜索“mDisplayId=”
+adb shell dumpsys display   # 在输出中搜索 “mDisplayId=”
 ```
 
-第二显示屏可能只能在设备运行Android 10或以上的情况下被控制（它可能会在电脑上显示，但无法通过电脑操作）。
+控制第二显示屏需要设备运行 Android 10 或更高版本 (否则将在只读状态下镜像)。
 
 
 #### 保持常亮
 
-防止设备在已连接的状态下休眠：
+阻止设备在连接时休眠：
 
 ```bash
 scrcpy --stay-awake
 scrcpy -w
 ```
 
-程序关闭后，设备设置会恢复原样。
+程序关闭时会恢复设备原来的设置。
 
 
 #### 关闭设备屏幕
 
-在启动屏幕镜像时，可以通过如下命令关闭设备的屏幕：
+可以通过以下的命令行参数在关闭设备屏幕的状态下进行镜像：
 
 ```bash
 scrcpy --turn-screen-off
 scrcpy -S
 ```
 
-或者在需要的时候按<kbd>MOD</kbd>+<kbd>o</kbd>。
+或者在任何时候按 <kbd>MOD</kbd>+<kbd>o</kbd>。
 
-要重新打开屏幕的话，需要按<kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>o</kbd>.
+要重新打开屏幕，按下 <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>o</kbd>.
 
-在Android上,`电源`按钮始终能把屏幕打开。
+在Android上，`电源` 按钮始终能把屏幕打开。为了方便，对于在 _scrcpy_ 中发出的 `电源` 事件 (通过鼠标右键或 <kbd>MOD</kbd>+<kbd>p</kbd>)，会 (尽最大的努力) 在短暂的延迟后将屏幕关闭。设备上的 `电源` 按钮仍然能打开设备屏幕。
 
-为了方便，如果按下`电源`按钮的事件是通过 _scrcpy_ 发出的（通过点按鼠标右键或<kbd>MOD</kbd>+<kbd>p</kbd>），它会在短暂的延迟后将屏幕关闭。
-
-物理的`电源`按钮仍然能打开设备屏幕。
-
-同时，这项功能还能被用于防止设备休眠：
+还可以同时阻止设备休眠：
 
 ```bash
 scrcpy --turn-screen-off --stay-awake
@@ -456,11 +463,11 @@ scrcpy -Sw
 ```
 
 
-#### 渲染超时帧
+#### 渲染过期帧
 
-为了降低延迟， _scrcpy_ 默认渲染解码成功的最近一帧，并跳过前面任意帧。
+默认状态下，为了降低延迟， _scrcpy_ 永远渲染解码成功的最近一帧，并跳过前面任意帧。
 
-强制渲染所有帧（可能导致延迟变高）：
+强制渲染所有帧 (可能导致延迟变高)：
 
 ```bash
 scrcpy --render-expired-frames
@@ -468,9 +475,9 @@ scrcpy --render-expired-frames
 
 #### 显示触摸
 
-在展示时，有些时候可能会用到显示触摸点这项功能（在设备上显示）。
+在演示时，可能会需要显示物理触摸点 (在物理设备上的触摸点)。
 
-Android在 _开发者设置_ 中提供了这项功能。
+Android 在 _开发者选项_ 中提供了这项功能。
 
 _Scrcpy_ 提供一个选项可以在启动时开启这项功能并在退出时恢复初始设置：
 
@@ -479,12 +486,12 @@ scrcpy --show-touches
 scrcpy -t
 ```
 
-请注意这项功能只能显示 _物理_ 触摸（要用手在屏幕上触摸）。
+请注意这项功能只能显示 _物理_ 触摸 (用手指在屏幕上的触摸)。
 
 
 #### 关闭屏保
 
-_Scrcpy_ 不会默认关闭屏幕保护。
+_Scrcpy_ 默认不会阻止电脑上开启的屏幕保护。
 
 关闭屏幕保护：
 
@@ -497,64 +504,58 @@ scrcpy --disable-screensaver
 
 #### 旋转设备屏幕
 
-使用<kbd>MOD</kbd>+<kbd>r</kbd>以在竖屏和横屏模式之间切换。
+使用 <kbd>MOD</kbd>+<kbd>r</kbd> 在竖屏和横屏模式之间切换。
 
 需要注意的是，只有在前台应用程序支持所要求的模式时，才会进行切换。
 
-#### 复制黏贴
+#### 复制粘贴
 
-每次Android的剪贴板变化的时候，它都会被自动同步到电脑的剪贴板上。
+每次安卓的剪贴板变化时，其内容都会被自动同步到电脑的剪贴板上。
 
 所有的 <kbd>Ctrl</kbd> 快捷键都会被转发至设备。其中：
- - <kbd>Ctrl</kbd>+<kbd>c</kbd> 复制
- - <kbd>Ctrl</kbd>+<kbd>x</kbd> 剪切
- - <kbd>Ctrl</kbd>+<kbd>v</kbd> 黏贴 （在电脑到设备的剪贴板同步完成之后）
+ - <kbd>Ctrl</kbd>+<kbd>c</kbd> 通常执行复制
+ - <kbd>Ctrl</kbd>+<kbd>x</kbd> 通常执行剪切
+ - <kbd>Ctrl</kbd>+<kbd>v</kbd> 通常执行粘贴 (在电脑到设备的剪贴板同步完成之后)
 
-这通常如您所期望的那样运作。
+大多数时候这些按键都会执行以上的功能。
 
-但实际的行为取决于设备上的前台程序。
-例如 _Termux_ 在<kbd>Ctrl</kbd>+<kbd>c</kbd>被按下时发送 SIGINT，
-又如 _K-9 Mail_ 会新建一封新邮件。
+但实际的行为取决于设备上的前台程序。例如，_Termux_ 会在按下 <kbd>Ctrl</kbd>+<kbd>c</kbd> 时发送 SIGINT，又如 _K-9 Mail_ 会新建一封邮件。
 
-在这种情况下剪切复制黏贴（仅在Android >= 7时可用）：
- - <kbd>MOD</kbd>+<kbd>c</kbd> 注入 `COPY`（复制）
- - <kbd>MOD</kbd>+<kbd>x</kbd> 注入 `CUT`（剪切）
- - <kbd>MOD</kbd>+<kbd>v</kbd> 注入 `PASTE`（黏贴）（在电脑到设备的剪贴板同步完成之后）
+要在这种情况下进行剪切，复制和粘贴 (仅支持 Android >= 7)：
+ - <kbd>MOD</kbd>+<kbd>c</kbd> 注入 `COPY` (复制)
+ - <kbd>MOD</kbd>+<kbd>x</kbd> 注入 `CUT` (剪切)
+ - <kbd>MOD</kbd>+<kbd>v</kbd> 注入 `PASTE` (粘贴) (在电脑到设备的剪贴板同步完成之后)
 
-另外，<kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd>可以将电脑的剪贴板内容转换为一串按键事件输入到设备。
-在应用程序不接受黏贴时（比如 _Termux_ ），这项功能可以排上一定的用场。
-需要注意的是，这项功能可能会导致非ASCII编码的内容出现错误。
+另外，<kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd> 会将电脑的剪贴板内容转换为一串按键事件输入到设备。在应用程序不接受粘贴时 (比如 _Termux_)，这项功能可以派上一定的用场。不过这项功能可能会导致非 ASCII 编码的内容出现错误。
 
-**警告：** 将电脑剪贴板的内容黏贴至设备（无论是通过<kbd>Ctrl</kbd>+<kbd>v</kbd>还是<kbd>MOD</kbd>+<kbd>v</kbd>）
-都需要将内容保存至设备的剪贴板。如此，任何一个应用程序都可以读取它。
-您应当避免将敏感内容通过这种方式传输（如密码）。
+**警告：** 将电脑剪贴板的内容粘贴至设备 (无论是通过 <kbd>Ctrl</kbd>+<kbd>v</kbd> 还是 <kbd>MOD</kbd>+<kbd>v</kbd>) 都会将内容复制到设备的剪贴板。如此，任何安卓应用程序都能读取到。您应避免将敏感内容 (如密码) 通过这种方式粘贴。
 
+一些设备不支持通过程序设置剪贴板。通过 `--legacy-paste` 选项可以修改 <kbd>Ctrl</kbd>+<kbd>v</kbd> 和 <kbd>MOD</kbd>+<kbd>v</kbd> 的工作方式，使它们通过按键事件 (同 <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd>) 来注入电脑剪贴板内容。
 
-#### 捏拉缩放
+#### 双指缩放
 
-模拟 “捏拉缩放”：<kbd>Ctrl</kbd>+_按住并移动鼠标_。
+模拟“双指缩放”：<kbd>Ctrl</kbd>+_按住并移动鼠标_。
 
-更准确的说，您需要在按住<kbd>Ctrl</kbd>的同时按住并移动鼠标。
-在鼠标左键松开之后，光标的任何操作都会相对于屏幕的中央进行。
+更准确的说，在按住鼠标左键时按住 <kbd>Ctrl</kbd>。直到松开鼠标左键，所有鼠标移动将以屏幕中心为原点，缩放或旋转内容 (如果应用支持)。
 
-具体来说， _scrcpy_ 使用“虚拟手指”以在相对于屏幕中央相反的位置产生触摸事件。
+实际上，_scrcpy_ 会在以屏幕中心对称的位置上生成由“虚拟手指”发出的额外触摸事件。
 
 
 #### 文字注入偏好
 
 打字的时候，系统会产生两种[事件][textevents]：
- - _按键事件_ ，代表一个按键被按下/松开。
- - _文本事件_ ，代表一个文本被输入。
+ - _按键事件_ ，代表一个按键被按下或松开。
+ - _文本事件_ ，代表一个字符被输入。
 
-程序默认使用按键事件来输入字母。只有这样，键盘才会在游戏中正常运作（尤其WASD键）。
+程序默认使用按键事件来输入字母。只有这样，键盘才会在游戏中正常运作 (例如 WASD 键)。
 
-但这也有可能[造成问题][prefertext]。如果您遇到了这样的问题，您可以通过下列操作避免它：
+但这也有可能[造成一些问题][prefertext]。如果您遇到了问题，可以通过以下方式避免：
 
 ```bash
 scrcpy --prefer-text
 ```
 
-（这会导致键盘在游戏中工作不正常）
+(这会导致键盘在游戏中工作不正常)
 
 [textevents]: https://blog.rom1v.com/2018/03/introducing-scrcpy/#handle-text-input
 [prefertext]: https://github.com/Genymobile/scrcpy/issues/650#issuecomment-512945343
@@ -562,8 +563,7 @@ scrcpy --prefer-text
 
 #### 按键重复
 
-当你一直按着一个按键不放时，程序默认产生多个按键事件。
-在某些游戏中这可能会导致性能问题。
+默认状态下，按住一个按键不放会生成多个重复按键事件。在某些游戏中这可能会导致性能问题。
 
 避免转发重复按键事件：
 
@@ -572,18 +572,27 @@ scrcpy --no-key-repeat
 ```
 
 
-### 文件传输
+#### 右键和中键
+
+默认状态下，右键会触发返回键 (或电源键)，中键会触发 HOME 键。要禁用这些快捷键并把所有点击转发到设备：
+
+```bash
+scrcpy --forward-all-clicks
+```
+
+
+### 文件拖放
 
 #### 安装APK
 
-如果您要要安装APK，请拖放APK文件（文件名以`.apk`结尾）到 _scrcpy_ 窗口。
+将 APK 文件 (文件名以 `.apk` 结尾) 拖放到 _scrcpy_ 窗口来安装。
 
 该操作在屏幕上不会出现任何变化，而会在控制台输出一条日志。
 
 
 #### 将文件推送至设备
 
-如果您要推送文件到设备的 `/sdcard/`，请拖放文件至（不能是APK文件）_scrcpy_ 窗口。
+要推送文件到设备的 `/sdcard/`，将 (非 APK) 文件拖放至 _scrcpy_ 窗口。
 
 该操作没有可见的响应，只会在控制台输出日志。
 
@@ -596,7 +605,7 @@ scrcpy --push-target /sdcard/foo/bar/
 
 ### 音频转发
 
-_scrcpy_ 不支持音频。请使用 [sndcpy].
+_Scrcpy_ 不支持音频。请使用 [sndcpy].
 
 另外请阅读 [issue #14]。
 
@@ -604,93 +613,90 @@ _scrcpy_ 不支持音频。请使用 [sndcpy].
 [issue #14]: https://github.com/Genymobile/scrcpy/issues/14
 
 
-## 热键
+## 快捷键
 
-在下列表格中, <kbd>MOD</kbd> 是热键的修饰键。
-默认是（左）<kbd>Alt</kbd>或者（左）<kbd>Super</kbd>。
+在以下列表中, <kbd>MOD</kbd> 是快捷键的修饰键。
+默认是 (左) <kbd>Alt</kbd> 或 (左) <kbd>Super</kbd>。
 
-您可以使用 `--shortcut-mod`后缀来修改它。可选的按键有`lctrl`、`rctrl`、
-`lalt`、`ralt`、`lsuper`和`rsuper`。如下例：
+您可以使用 `--shortcut-mod` 来修改。可选的按键有 `lctrl`、`rctrl`、`lalt`、`ralt`、`lsuper` 和 `rsuper`。例如：
 
 ```bash
-# 使用右侧的Ctrl键
+# 使用右 Ctrl 键
 scrcpy --shortcut-mod=rctrl
 
-# 使用左侧的Ctrl键、Alt键或Super键
+# 使用左 Ctrl 键 + 左 Alt 键，或 Super 键
 scrcpy --shortcut-mod=lctrl+lalt,lsuper
 ```
 
-_一般来说，<kbd>[Super]</kbd>就是<kbd>Windows</kbd>或者<kbd>Cmd</kbd>。_
+_<kbd>[Super]</kbd> 键通常是指 <kbd>Windows</kbd> 或 <kbd>Cmd</kbd> 键。_
 
 [Super]: https://en.wikipedia.org/wiki/Super_key_(keyboard_button)
 
- | 操作                                        |   快捷键
- | ------------------------------------------- |:-----------------------------
- | 全屏                                        | <kbd>MOD</kbd>+<kbd>f</kbd>
- | 向左旋转屏幕                                 | <kbd>MOD</kbd>+<kbd>←</kbd> _(左)_
- | 向右旋转屏幕                                 | <kbd>MOD</kbd>+<kbd>→</kbd> _(右)_
- | 将窗口大小重置为1:1 (像素优先)                | <kbd>MOD</kbd>+<kbd>g</kbd>
- | 将窗口大小重置为消除黑边                      | <kbd>MOD</kbd>+<kbd>w</kbd> \| _双击¹_
- | 点按 `主屏幕`                                | <kbd>MOD</kbd>+<kbd>h</kbd> \| _点击鼠标中键_
- | 点按 `返回`                                  | <kbd>MOD</kbd>+<kbd>b</kbd> \| _点击鼠标右键²_
- | 点按 `切换应用`                              | <kbd>MOD</kbd>+<kbd>s</kbd>
- | 点按 `菜单` （解锁屏幕）                      | <kbd>MOD</kbd>+<kbd>m</kbd>
- | 点按 `音量+`                                | <kbd>MOD</kbd>+<kbd>↑</kbd> _(up)_
- | 点按 `音量-`                                | <kbd>MOD</kbd>+<kbd>↓</kbd> _(down)_
- | 点按 `电源`                                 | <kbd>MOD</kbd>+<kbd>p</kbd>
- | 打开屏幕                                    | _点击鼠标右键²_
- | 关闭设备屏幕（但继续在电脑上显示）             | <kbd>MOD</kbd>+<kbd>o</kbd>
- | 打开设备屏幕                                 | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>o</kbd>
- | 旋转设备屏幕                                 | <kbd>MOD</kbd>+<kbd>r</kbd>
- | 展开通知面板                                 | <kbd>MOD</kbd>+<kbd>n</kbd>
- | 展开快捷操作                                 | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>n</kbd>
- | 复制到剪贴板³                                | <kbd>MOD</kbd>+<kbd>c</kbd>
- | 剪切到剪贴板³                                | <kbd>MOD</kbd>+<kbd>x</kbd>
- | 同步剪贴板并黏贴³                            | <kbd>MOD</kbd>+<kbd>v</kbd>
- | 导入电脑剪贴板文本                           | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd>
- | 打开/关闭FPS显示（在 stdout)                 | <kbd>MOD</kbd>+<kbd>i</kbd>
- | 捏拉缩放                                    | <kbd>Ctrl</kbd>+_点按并移动鼠标_
+ | 操作                              | 快捷键                                       |
+ | --------------------------------- | :------------------------------------------- |
+ | 全屏                              | <kbd>MOD</kbd>+<kbd>f</kbd>                  |
+ | 向左旋转屏幕                      | <kbd>MOD</kbd>+<kbd>←</kbd> _(左箭头)_       |
+ | 向右旋转屏幕                      | <kbd>MOD</kbd>+<kbd>→</kbd> _(右箭头)_       |
+ | 将窗口大小重置为1:1 (匹配像素)    | <kbd>MOD</kbd>+<kbd>g</kbd>                  |
+ | 将窗口大小重置为消除黑边          | <kbd>MOD</kbd>+<kbd>w</kbd> \| _双击¹_       |
+ | 点按 `主屏幕`                     | <kbd>MOD</kbd>+<kbd>h</kbd> \| _鼠标中键_    |
+ | 点按 `返回`                       | <kbd>MOD</kbd>+<kbd>b</kbd> \| _鼠标右键²_   |
+ | 点按 `切换应用`                   | <kbd>MOD</kbd>+<kbd>s</kbd>                  |
+ | 点按 `菜单` (解锁屏幕)            | <kbd>MOD</kbd>+<kbd>m</kbd>                  |
+ | 点按 `音量+`                      | <kbd>MOD</kbd>+<kbd>↑</kbd> _(上箭头)_       |
+ | 点按 `音量-`                      | <kbd>MOD</kbd>+<kbd>↓</kbd> _(下箭头)_       |
+ | 点按 `电源`                       | <kbd>MOD</kbd>+<kbd>p</kbd>                  |
+ | 打开屏幕                          | _鼠标右键²_                                  |
+ | 关闭设备屏幕 (但继续在电脑上显示) | <kbd>MOD</kbd>+<kbd>o</kbd>                  |
+ | 打开设备屏幕                      | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>o</kbd> |
+ | 旋转设备屏幕                      | <kbd>MOD</kbd>+<kbd>r</kbd>                  |
+ | 展开通知面板                      | <kbd>MOD</kbd>+<kbd>n</kbd>                  |
+ | 收起通知面板                      | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>n</kbd> |
+ | 复制到剪贴板³                     | <kbd>MOD</kbd>+<kbd>c</kbd>                  |
+ | 剪切到剪贴板³                     | <kbd>MOD</kbd>+<kbd>x</kbd>                  |
+ | 同步剪贴板并粘贴³                 | <kbd>MOD</kbd>+<kbd>v</kbd>                  |
+ | 注入电脑剪贴板文本                | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd> |
+ | 打开/关闭FPS显示 (在 stdout)      | <kbd>MOD</kbd>+<kbd>i</kbd>                  |
+ | 捏拉缩放                          | <kbd>Ctrl</kbd>+_按住并移动鼠标_             |
 
-_¹双击黑色边界以关闭黑色边界_  
-_²点击鼠标右键将在屏幕熄灭时点亮屏幕，其余情况则视为按下 返回键 。_  
+_¹双击黑边可以去除黑边_
+_²点击鼠标右键将在屏幕熄灭时点亮屏幕，其余情况则视为按下返回键 。_
 _³需要安卓版本 Android >= 7。_
 
-所有的 <kbd>Ctrl</kbd>+_按键_ 的热键都是被转发到设备进行处理的，所以实际上会由当前应用程序对其做出响应。
+所有的 <kbd>Ctrl</kbd>+_按键_ 的快捷键都会被转发到设备，所以会由当前应用程序进行处理。
 
 
 ## 自定义路径
 
-为了使用您想使用的 _adb_ ，您可以在环境变量
-`ADB`中设置它的路径：
+要使用指定的 _adb_ 二进制文件，可以设置环境变量 `ADB`：
 
     ADB=/path/to/adb scrcpy
 
-如果需要覆盖`scrcpy-server`的路径，您可以在
-`SCRCPY_SERVER_PATH`中设置它。
+要覆盖 `scrcpy-server` 的路径，可以设置 `SCRCPY_SERVER_PATH`。
 
 [useful]: https://github.com/Genymobile/scrcpy/issues/278#issuecomment-429330345
 
 
 ## 为什么叫 _scrcpy_ ？
 
-一个同事让我找出一个和[gnirehtet]一样难以发音的名字。
+一个同事让我找出一个和 [gnirehtet] 一样难以发音的名字。
 
-[`strcpy`] 可以复制**str**ing； `scrcpy` 可以复制**scr**een。
+[`strcpy`] 复制一个 **str**ing； `scrcpy` 复制一个 **scr**een。
 
 [gnirehtet]: https://github.com/Genymobile/gnirehtet
 [`strcpy`]: http://man7.org/linux/man-pages/man3/strcpy.3.html
 
 
-## 如何编译？
+## 如何构建？
 
-请查看[编译]。
+请查看[BUILD]。
 
-[编译]: BUILD.md
+[BUILD]: BUILD.md
 
 
 ## 常见问题
 
-请查看[FAQ](FAQ.md).
+请查看[FAQ](FAQ.md)。
 
 
 ## 开发者

README.zh-Hant.md

@@ -80,10 +80,7 @@ apt install scrcpy
 
 為了保持簡單，Windows 用戶可以下載一個包含所有必需軟體 (包含 `adb`) 的壓縮包:
 
-- [`scrcpy-win64-v1.15.zip`][direct-win64]  
-   _(SHA-256: dd514bb591e63ef4cd52a53c30f1153a28f59722d64690eb07bd017849edcba2)_
-
-[direct-win64]: https://github.com/Genymobile/scrcpy/releases/download/v1.15/scrcpy-win64-v1.15.zip
+ - [README](README.md#windows)
 
 [Chocolatey] 上也可以下載:
 

app/meson.build

@@ -2,14 +2,16 @@ src = [
     'src/main.c',
     'src/adb.c',
     'src/cli.c',
+    'src/clock.c',
+    'src/compat.c',
     'src/control_msg.c',
     'src/controller.c',
     'src/decoder.c',
-    'src/device.c',
     'src/device_msg.c',
     'src/event_converter.c',
     'src/file_handler.c',
     'src/fps_counter.c',
+    'src/frame_buffer.c',
     'src/input_manager.c',
     'src/opengl.c',
     'src/receiver.c',
@@ -20,9 +22,12 @@ src = [
     'src/stream.c',
     'src/tiny_xpm.c',
     'src/video_buffer.c',
+    'src/util/log.c',
     'src/util/net.c',
     'src/util/process.c',
-    'src/util/str_util.c'
+    'src/util/str_util.c',
+    'src/util/thread.c',
+    'src/util/tick.c',
 ]
 
 if host_machine.system() == 'windows'
@@ -31,6 +36,15 @@ else
     src += [ 'src/sys/unix/process.c' ]
 endif
 
+v4l2_support = host_machine.system() == 'linux'
+if v4l2_support
+    src += [ 'src/v4l2_sink.c' ]
+endif
+
+check_functions = [
+    'strdup'
+]
+
 cc = meson.get_compiler('c')
 
 if not get_option('crossbuild_windows')
@@ -43,6 +57,10 @@ if not get_option('crossbuild_windows')
         dependency('sdl2'),
     ]
 
+    if v4l2_support
+        dependencies += dependency('libavdevice')
+    endif
+
 else
 
     # cross-compile mingw32 build (from Linux to Windows)
@@ -86,8 +104,12 @@ endif
 
 conf = configuration_data()
 
-# expose the build type
-conf.set('NDEBUG', get_option('buildtype') != 'debug')
+foreach f : check_functions
+  if cc.has_function(f)
+    define = 'HAVE_' + f.underscorify().to_upper()
+    conf.set(define, true)
+  endif
+endforeach
 
 # the version, updated on release
 conf.set_quoted('SCRCPY_VERSION', meson.project_version())
@@ -104,29 +126,19 @@ conf.set('PORTABLE', get_option('portable'))
 conf.set('DEFAULT_LOCAL_PORT_RANGE_FIRST', '27183')
 conf.set('DEFAULT_LOCAL_PORT_RANGE_LAST', '27199')
 
-# the default max video size for both dimensions, in pixels
-# overridden by option --max-size
-conf.set('DEFAULT_MAX_SIZE', '0')  # 0: unlimited
-
-# the default video orientation
-# natural device orientation is 0 and each increment adds 90 degrees
-# counterclockwise
-# overridden by option --lock-video-orientation
-conf.set('DEFAULT_LOCK_VIDEO_ORIENTATION', '-1')  # -1: unlocked
-
 # the default video bitrate, in bits/second
 # overridden by option --bit-rate
 conf.set('DEFAULT_BIT_RATE', '8000000')  # 8Mbps
 
-# enable High DPI support
-conf.set('HIDPI_SUPPORT', get_option('hidpi_support'))
-
 # run a server debugger and wait for a client to be attached
 conf.set('SERVER_DEBUGGER', get_option('server_debugger'))
 
 # select the debugger method ('old' for Android < 9, 'new' for Android >= 9)
 conf.set('SERVER_DEBUGGER_METHOD_NEW', get_option('server_debugger_method') == 'new')
 
+# enable V4L2 support (linux only)
+conf.set('HAVE_V4L2', v4l2_support)
+
 configure_file(configuration: conf, output: 'config.h')
 
 src_dir = include_directories('src')
@@ -156,6 +168,10 @@ if get_option('buildtype') == 'debug'
             'src/cli.c',
             'src/util/str_util.c',
         ]],
+        ['test_clock', [
+            'tests/test_clock.c',
+            'src/clock.c',
+        ]],
         ['test_control_msg_serialize', [
             'tests/test_control_msg_serialize.c',
             'src/control_msg.c',

app/scrcpy.1

@@ -56,6 +56,12 @@ The list of possible display ids can be listed by "adb shell dumpsys display"
 
 Default is 0.
 
+.TP
+.BI "\-\-display\-buffer ms
+Add a buffering delay (in milliseconds) before displaying. This increases latency to compensate for jitter.
+
+Default is 0 (no buffering).
+
 .TP
 .BI "\-\-encoder " name
 Use a specific MediaCodec encoder (must be a H.264 encoder).
@@ -83,10 +89,12 @@ Inject computer clipboard text as a sequence of key events on Ctrl+v (like MOD+S
 This is a workaround for some devices not behaving as expected when setting the device clipboard programmatically.
 
 .TP
-.BI "\-\-lock\-video\-orientation " value
-Lock video orientation to \fIvalue\fR. Possible values are -1 (unlocked), 0, 1, 2 and 3. Natural device orientation is 0, and each increment adds a 90 degrees otation counterclockwise.
+.BI "\-\-lock\-video\-orientation[=value]
+Lock video orientation to \fIvalue\fR. Possible values are "unlocked", "initial" (locked to the initial orientation), 0, 1, 2 and 3. Natural device orientation is 0, and each increment adds a 90 degrees otation counterclockwise.
 
-Default is -1 (unlocked).
+Default is "unlocked".
+
+Passing the option without argument is equivalent to passing "initial".
 
 .TP
 .BI "\-\-max\-fps " value
@@ -131,7 +139,7 @@ but breaks the expected behavior of alpha keys in games (typically WASD).
 .BI "\-\-push\-target " path
 Set the target directory for pushing files to the device by drag & drop. It is passed as\-is to "adb push".
 
-Default is "/sdcard/".
+Default is "/sdcard/Download/".
 
 .TP
 .BI "\-r, \-\-record " file
@@ -155,10 +163,6 @@ Supported names are currently "direct3d", "opengl", "opengles2", "opengles", "me
 .UR https://wiki.libsdl.org/SDL_HINT_RENDER_DRIVER
 .UE
 
-.TP
-.B \-\-render\-expired\-frames
-By default, to minimize latency, scrcpy always renders the last available decoded frame, and drops any previous ones. This flag forces to render all frames, at a cost of a possible increased latency.
-
 .TP
 .BI "\-\-rotation " value
 Set the initial display rotation. Possibles values are 0, 1, 2 and 3. Each increment adds a 90 degrees rotation counterclockwise.
@@ -188,15 +192,27 @@ Enable "show touches" on start, restore the initial value on exit.
 It only shows physical touches (not clicks from scrcpy).
 
 .TP
-.B \-v, \-\-version
-Print the version of scrcpy.
+.BI "\-\-v4l2-sink " /dev/videoN
+Output to v4l2loopback device.
+
+It requires to lock the video orientation (see \fB\-\-lock\-video\-orientation\fR).
+
+.TP
+.BI "\-\-v4l2-buffer " ms
+Add a buffering delay (in milliseconds) before pushing frames. This increases latency to compensate for jitter.
+
+This option is similar to \fB\-\-display\-buffer\fR, but specific to V4L2 sink.
 
 .TP
 .BI "\-V, \-\-verbosity " value
-Set the log level ("debug", "info", "warn" or "error").
+Set the log level ("verbose", "debug", "info", "warn" or "error").
 
 Default is "info" for release builds, "debug" for debug builds.
 
+.TP
+.B \-v, \-\-version
+Print the version of scrcpy.
+
 .TP
 .B \-w, \-\-stay-awake
 Keep the device on while scrcpy is running, when the device is plugged in.
@@ -213,30 +229,30 @@ Set a custom window title.
 .BI "\-\-window\-x " value
 Set the initial window horizontal position.
 
-Default is "auto".\n
+Default is "auto".
 
 .TP
 .BI "\-\-window\-y " value
 Set the initial window vertical position.
 
-Default is "auto".\n
+Default is "auto".
 
 .TP
 .BI "\-\-window\-width " value
 Set the initial window width.
 
-Default is 0 (automatic).\n
+Default is 0 (automatic).
 
 .TP
 .BI "\-\-window\-height " value
 Set the initial window height.
 
-Default is 0 (automatic).\n
+Default is 0 (automatic).
 
 .SH SHORTCUTS
 
 In the following list, MOD is the shortcut modifier. By default, it's (left)
-Alt or (left) Super, but it can be configured by \-\-shortcut-mod (see above).
+Alt or (left) Super, but it can be configured by \fB\-\-shortcut\-mod\fR (see above).
 
 .TP
 .B MOD+f

app/src/adb.c

@@ -81,14 +81,20 @@ show_adb_installation_msg() {
 
 static void
 show_adb_err_msg(enum process_result err, const char *const argv[]) {
-    char buf[512];
+#define MAX_COMMAND_STRING_LEN 1024
+    char *buf = malloc(MAX_COMMAND_STRING_LEN);
+    if (!buf) {
+        LOGE("Failed to execute (could not allocate error message)");
+        return;
+    }
+
     switch (err) {
         case PROCESS_ERROR_GENERIC:
-            argv_to_string(argv, buf, sizeof(buf));
+            argv_to_string(argv, buf, MAX_COMMAND_STRING_LEN);
             LOGE("Failed to execute: %s", buf);
             break;
         case PROCESS_ERROR_MISSING_BINARY:
-            argv_to_string(argv, buf, sizeof(buf));
+            argv_to_string(argv, buf, MAX_COMMAND_STRING_LEN);
             LOGE("Command not found: %s", buf);
             LOGE("(make 'adb' accessible from your PATH or define its full"
                  "path in the ADB environment variable)");
@@ -98,29 +104,38 @@ show_adb_err_msg(enum process_result err, const char *const argv[]) {
             // do nothing
             break;
     }
+
+    free(buf);
 }
 
 process_t
 adb_execute(const char *serial, const char *const adb_cmd[], size_t len) {
-    const char *cmd[len + 4];
     int i;
     process_t process;
-    cmd[0] = get_adb_command();
+
+    const char **argv = malloc((len + 4) * sizeof(*argv));
+    if (!argv) {
+        return PROCESS_NONE;
+    }
+
+    argv[0] = get_adb_command();
     if (serial) {
-        cmd[1] = "-s";
-        cmd[2] = serial;
+        argv[1] = "-s";
+        argv[2] = serial;
         i = 3;
     } else {
         i = 1;
     }
 
-    memcpy(&cmd[i], adb_cmd, len * sizeof(const char *));
-    cmd[len + i] = NULL;
-    enum process_result r = process_execute(cmd, &process);
+    memcpy(&argv[i], adb_cmd, len * sizeof(const char *));
+    argv[len + i] = NULL;
+    enum process_result r = process_execute(argv, &process);
     if (r != PROCESS_SUCCESS) {
-        show_adb_err_msg(r, cmd);
-        return PROCESS_NONE;
+        show_adb_err_msg(r, argv);
+        process = PROCESS_NONE;
     }
+
+    free(argv);
     return process;
 }
 
@@ -173,7 +188,7 @@ adb_push(const char *serial, const char *local, const char *remote) {
     }
     remote = strquote(remote);
     if (!remote) {
-        SDL_free((void *) local);
+        free((void *) local);
         return PROCESS_NONE;
     }
 #endif
@@ -182,8 +197,8 @@ adb_push(const char *serial, const char *local, const char *remote) {
     process_t proc = adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd));
 
 #ifdef __WINDOWS__
-    SDL_free((void *) remote);
-    SDL_free((void *) local);
+    free((void *) remote);
+    free((void *) local);
 #endif
 
     return proc;
@@ -204,7 +219,7 @@ adb_install(const char *serial, const char *local) {
     process_t proc = adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd));
 
 #ifdef __WINDOWS__
-    SDL_free((void *) local);
+    free((void *) local);
 #endif
 
     return proc;

app/src/android/input.h

@@ -21,7 +21,7 @@
 #define _ANDROID_INPUT_H
 
 /**
- * Meta key / modifer state.
+ * Meta key / modifier state.
  */
 enum android_metastate {
     /** No meta keys are pressed. */

app/src/cli.c

@@ -10,6 +10,9 @@
 #include "util/log.h"
 #include "util/str_util.h"
 
+#define STR_IMPL_(x) #x
+#define STR(x) STR_IMPL_(x)
+
 void
 scrcpy_print_usage(const char *arg0) {
     fprintf(stderr,
@@ -23,7 +26,7 @@ scrcpy_print_usage(const char *arg0) {
         "    -b, --bit-rate value\n"
         "        Encode the video at the given bit-rate, expressed in bits/s.\n"
         "        Unit suffixes are supported: 'K' (x1000) and 'M' (x1000000).\n"
-        "        Default is %d.\n"
+        "        Default is " STR(DEFAULT_BIT_RATE) ".\n"
         "\n"
         "    --codec-options key[:type]=value[,...]\n"
         "        Set a list of comma-separated key:type=value options for the\n"
@@ -52,6 +55,12 @@ scrcpy_print_usage(const char *arg0) {
         "\n"
         "        Default is 0.\n"
         "\n"
+        "    --display-buffer ms\n"
+        "        Add a buffering delay (in milliseconds) before displaying.\n"
+        "        This increases latency to compensate for jitter.\n"
+        "\n"
+        "        Default is 0 (no buffering).\n"
+        "\n"
         "    --encoder name\n"
         "        Use a specific MediaCodec encoder (must be a H.264 encoder).\n"
         "\n"
@@ -76,12 +85,15 @@ scrcpy_print_usage(const char *arg0) {
         "        This is a workaround for some devices not behaving as\n"
         "        expected when setting the device clipboard programmatically.\n"
         "\n"
-        "    --lock-video-orientation value\n"
+        "    --lock-video-orientation[=value]\n"
         "        Lock video orientation to value.\n"
-        "        Possible values are -1 (unlocked), 0, 1, 2 and 3.\n"
+        "        Possible values are \"unlocked\", \"initial\" (locked to the\n"
+        "        initial orientation), 0, 1, 2 and 3.\n"
         "        Natural device orientation is 0, and each increment adds a\n"
         "        90 degrees rotation counterclockwise.\n"
-        "        Default is %d%s.\n"
+        "        Default is \"unlocked\".\n"
+        "        Passing the option without argument is equivalent to passing\n"
+        "        \"initial\".\n"
         "\n"
         "    --max-fps value\n"
         "        Limit the frame rate of screen capture (officially supported\n"
@@ -91,7 +103,7 @@ scrcpy_print_usage(const char *arg0) {
         "        Limit both the width and height of the video to value. The\n"
         "        other dimension is computed so that the device aspect-ratio\n"
         "        is preserved.\n"
-        "        Default is %d%s.\n"
+        "        Default is 0 (unlimited).\n"
         "\n"
         "    -n, --no-control\n"
         "        Disable device control (mirror the device in read-only).\n"
@@ -110,7 +122,8 @@ scrcpy_print_usage(const char *arg0) {
         "\n"
         "    -p, --port port[:port]\n"
         "        Set the TCP port (range) used by the client to listen.\n"
-        "        Default is %d:%d.\n"
+        "        Default is " STR(DEFAULT_LOCAL_PORT_RANGE_FIRST) ":"
+                              STR(DEFAULT_LOCAL_PORT_RANGE_LAST) ".\n"
         "\n"
         "    --prefer-text\n"
         "        Inject alpha characters and space as text events instead of\n"
@@ -122,7 +135,7 @@ scrcpy_print_usage(const char *arg0) {
         "    --push-target path\n"
         "        Set the target directory for pushing files to the device by\n"
         "        drag & drop. It is passed as-is to \"adb push\".\n"
-        "        Default is \"/sdcard/\".\n"
+        "        Default is \"/sdcard/Download/\".\n"
         "\n"
         "    -r, --record file.mp4\n"
         "        Record screen to file.\n"
@@ -139,12 +152,6 @@ scrcpy_print_usage(const char *arg0) {
         "        \"opengles2\", \"opengles\", \"metal\" and \"software\".\n"
         "        <https://wiki.libsdl.org/SDL_HINT_RENDER_DRIVER>\n"
         "\n"
-        "    --render-expired-frames\n"
-        "        By default, to minimize latency, scrcpy always renders the\n"
-        "        last available decoded frame, and drops any previous ones.\n"
-        "        This flag forces to render all frames, at a cost of a\n"
-        "        possible increased latency.\n"
-        "\n"
         "    --rotation value\n"
         "        Set the initial display rotation.\n"
         "        Possibles values are 0, 1, 2 and 3. Each increment adds a 90\n"
@@ -175,16 +182,32 @@ scrcpy_print_usage(const char *arg0) {
         "        on exit.\n"
         "        It only shows physical touches (not clicks from scrcpy).\n"
         "\n"
-        "    -v, --version\n"
-        "        Print the version of scrcpy.\n"
+#ifdef HAVE_V4L2
+        "    --v4l2-sink /dev/videoN\n"
+        "        Output to v4l2loopback device.\n"
+        "        It requires to lock the video orientation (see\n"
+        "        --lock-video-orientation).\n"
         "\n"
+        "    --v4l2-buffer ms\n"
+        "        Add a buffering delay (in milliseconds) before pushing\n"
+        "        frames. This increases latency to compensate for jitter.\n"
+        "\n"
+        "        This option is similar to --display-buffer, but specific to\n"
+        "        V4L2 sink.\n"
+        "\n"
+        "        Default is 0 (no buffering).\n"
+        "\n"
+#endif
         "    -V, --verbosity value\n"
-        "        Set the log level (debug, info, warn or error).\n"
+        "        Set the log level (verbose, debug, info, warn or error).\n"
 #ifndef NDEBUG
         "        Default is debug.\n"
 #else
         "        Default is info.\n"
 #endif
+        "\n"
+        "    -v, --version\n"
+        "        Print the version of scrcpy.\n"
         "\n"
         "    -w, --stay-awake\n"
         "        Keep the device on while scrcpy is running, when the device\n"
@@ -209,7 +232,7 @@ scrcpy_print_usage(const char *arg0) {
         "        Default is 0 (automatic).\n"
         "\n"
         "    --window-height value\n"
-        "        Set the initial window width.\n"
+        "        Set the initial window height.\n"
         "        Default is 0 (automatic).\n"
         "\n"
         "Shortcuts:\n"
@@ -297,12 +320,7 @@ scrcpy_print_usage(const char *arg0) {
         "\n"
         "    Drag & drop APK file\n"
         "        Install APK from computer\n"
-        "\n",
-        arg0,
-        DEFAULT_BIT_RATE,
-        DEFAULT_LOCK_VIDEO_ORIENTATION, DEFAULT_LOCK_VIDEO_ORIENTATION >= 0 ? "" : " (unlocked)",
-        DEFAULT_MAX_SIZE, DEFAULT_MAX_SIZE ? "" : " (unlimited)",
-        DEFAULT_LOCAL_PORT_RANGE_FIRST, DEFAULT_LOCAL_PORT_RANGE_LAST);
+        "\n", arg0);
 }
 
 static bool
@@ -390,15 +408,40 @@ parse_max_fps(const char *s, uint16_t *max_fps) {
 }
 
 static bool
-parse_lock_video_orientation(const char *s, int8_t *lock_video_orientation) {
+parse_buffering_time(const char *s, sc_tick *tick) {
     long value;
-    bool ok = parse_integer_arg(s, &value, false, -1, 3,
+    bool ok = parse_integer_arg(s, &value, false, 0, 0xFFFFFFFF,
+                                "buffering time");
+    if (!ok) {
+        return false;
+    }
+
+    *tick = SC_TICK_FROM_MS(value);
+    return true;
+}
+
+static bool
+parse_lock_video_orientation(const char *s,
+                             enum sc_lock_video_orientation *lock_mode) {
+    if (!s || !strcmp(s, "initial")) {
+        // Without argument, lock the initial orientation
+        *lock_mode = SC_LOCK_VIDEO_ORIENTATION_INITIAL;
+        return true;
+    }
+
+    if (!strcmp(s, "unlocked")) {
+        *lock_mode = SC_LOCK_VIDEO_ORIENTATION_UNLOCKED;
+        return true;
+    }
+
+    long value;
+    bool ok = parse_integer_arg(s, &value, false, 0, 3,
                                 "lock video orientation");
     if (!ok) {
         return false;
     }
 
-    *lock_video_orientation = (int8_t) value;
+    *lock_mode = (enum sc_lock_video_orientation) value;
     return true;
 }
 
@@ -490,6 +533,11 @@ parse_display_id(const char *s, uint32_t *display_id) {
 
 static bool
 parse_log_level(const char *s, enum sc_log_level *log_level) {
+    if (!strcmp(s, "verbose")) {
+        *log_level = SC_LOG_LEVEL_VERBOSE;
+        return true;
+    }
+
     if (!strcmp(s, "debug")) {
         *log_level = SC_LOG_LEVEL_DEBUG;
         return true;
@@ -667,6 +715,10 @@ guess_record_format(const char *filename) {
 #define OPT_FORWARD_ALL_CLICKS     1023
 #define OPT_LEGACY_PASTE           1024
 #define OPT_ENCODER_NAME           1025
+#define OPT_POWER_OFF_ON_CLOSE     1026
+#define OPT_V4L2_SINK              1027
+#define OPT_DISPLAY_BUFFER         1028
+#define OPT_V4L2_BUFFER            1029
 
 bool
 scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
@@ -678,6 +730,7 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
         {"disable-screensaver",    no_argument,       NULL,
                                                   OPT_DISABLE_SCREENSAVER},
         {"display",                required_argument, NULL, OPT_DISPLAY_ID},
+        {"display-buffer",         required_argument, NULL, OPT_DISPLAY_BUFFER},
         {"encoder",                required_argument, NULL, OPT_ENCODER_NAME},
         {"force-adb-forward",      no_argument,       NULL,
                                                   OPT_FORCE_ADB_FORWARD},
@@ -686,7 +739,7 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
         {"fullscreen",             no_argument,       NULL, 'f'},
         {"help",                   no_argument,       NULL, 'h'},
         {"legacy-paste",           no_argument,       NULL, OPT_LEGACY_PASTE},
-        {"lock-video-orientation", required_argument, NULL,
+        {"lock-video-orientation", optional_argument, NULL,
                                                   OPT_LOCK_VIDEO_ORIENTATION},
         {"max-fps",                required_argument, NULL, OPT_MAX_FPS},
         {"max-size",               required_argument, NULL, 'm'},
@@ -708,6 +761,10 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
         {"show-touches",           no_argument,       NULL, 't'},
         {"stay-awake",             no_argument,       NULL, 'w'},
         {"turn-screen-off",        no_argument,       NULL, 'S'},
+#ifdef HAVE_V4L2
+        {"v4l2-sink",              required_argument, NULL, OPT_V4L2_SINK},
+        {"v4l2-buffer",            required_argument, NULL, OPT_V4L2_BUFFER},
+#endif
         {"verbosity",              required_argument, NULL, 'V'},
         {"version",                no_argument,       NULL, 'v'},
         {"window-title",           required_argument, NULL, OPT_WINDOW_TITLE},
@@ -717,6 +774,8 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
         {"window-height",          required_argument, NULL, OPT_WINDOW_HEIGHT},
         {"window-borderless",      no_argument,       NULL,
                                                   OPT_WINDOW_BORDERLESS},
+        {"power-off-on-close",     no_argument,       NULL,
+                                                  OPT_POWER_OFF_ON_CLOSE},
         {NULL,                     0,                 NULL, 0  },
     };
 
@@ -769,7 +828,8 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
                 }
                 break;
             case OPT_LOCK_VIDEO_ORIENTATION:
-                if (!parse_lock_video_orientation(optarg, &opts->lock_video_orientation)) {
+                if (!parse_lock_video_orientation(optarg,
+                        &opts->lock_video_orientation)) {
                     return false;
                 }
                 break;
@@ -814,7 +874,8 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
                 opts->stay_awake = true;
                 break;
             case OPT_RENDER_EXPIRED_FRAMES:
-                opts->render_expired_frames = true;
+                LOGW("Option --render-expired-frames has been removed. This "
+                     "flag has been ignored.");
                 break;
             case OPT_WINDOW_TITLE:
                 opts->window_title = optarg;
@@ -885,16 +946,49 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
             case OPT_LEGACY_PASTE:
                 opts->legacy_paste = true;
                 break;
+            case OPT_POWER_OFF_ON_CLOSE:
+                opts->power_off_on_close = true;
+                break;
+            case OPT_DISPLAY_BUFFER:
+                if (!parse_buffering_time(optarg, &opts->display_buffer)) {
+                    return false;
+                }
+                break;
+#ifdef HAVE_V4L2
+            case OPT_V4L2_SINK:
+                opts->v4l2_device = optarg;
+                break;
+            case OPT_V4L2_BUFFER:
+                if (!parse_buffering_time(optarg, &opts->v4l2_buffer)) {
+                    return false;
+                }
+                break;
+#endif
             default:
                 // getopt prints the error message on stderr
                 return false;
         }
     }
 
+#ifdef HAVE_V4L2
+    if (!opts->display && !opts->record_filename && !opts->v4l2_device) {
+        LOGE("-N/--no-display requires either screen recording (-r/--record)"
+             " or sink to v4l2loopback device (--v4l2-sink)");
+        return false;
+    }
+
+    if (opts->v4l2_device && opts->lock_video_orientation
+                             == SC_LOCK_VIDEO_ORIENTATION_UNLOCKED) {
+        LOGI("Video orientation is locked for v4l2 sink. "
+             "See --lock-video-orientation.");
+        opts->lock_video_orientation = SC_LOCK_VIDEO_ORIENTATION_INITIAL;
+    }
+#else
     if (!opts->display && !opts->record_filename) {
         LOGE("-N/--no-display requires screen recording (-r/--record)");
         return false;
     }
+#endif
 
     int index = optind;
     if (index < argc) {
@@ -910,7 +1004,8 @@ scrcpy_parse_args(struct scrcpy_cli_args *args, int argc, char *argv[]) {
     if (opts->record_filename && !opts->record_format) {
         opts->record_format = guess_record_format(opts->record_filename);
         if (!opts->record_format) {
-            LOGE("No format specified for \"%s\" (try with -F mkv)",
+            LOGE("No format specified for \"%s\" "
+                 "(try with --record-format=mkv)",
                  opts->record_filename);
             return false;
         }

app/src/clock.c

@@ -0,0 +1,111 @@
+#include "clock.h"
+
+#include "util/log.h"
+
+#define SC_CLOCK_NDEBUG // comment to debug
+
+void
+sc_clock_init(struct sc_clock *clock) {
+    clock->count = 0;
+    clock->head = 0;
+    clock->left_sum.system = 0;
+    clock->left_sum.stream = 0;
+    clock->right_sum.system = 0;
+    clock->right_sum.stream = 0;
+}
+
+// Estimate the affine function f(stream) = slope * stream + offset
+static void
+sc_clock_estimate(struct sc_clock *clock,
+                  double *out_slope, sc_tick *out_offset) {
+    assert(clock->count > 1); // two points are necessary
+
+    struct sc_clock_point left_avg = {
+        .system = clock->left_sum.system / (clock->count / 2),
+        .stream = clock->left_sum.stream / (clock->count / 2),
+    };
+    struct sc_clock_point right_avg = {
+        .system = clock->right_sum.system / ((clock->count + 1) / 2),
+        .stream = clock->right_sum.stream / ((clock->count + 1) / 2),
+    };
+
+    double slope = (double) (right_avg.system - left_avg.system)
+                 / (right_avg.stream - left_avg.stream);
+
+    if (clock->count < SC_CLOCK_RANGE) {
+        /* The first frames are typically received and decoded with more delay
+         * than the others, causing a wrong slope estimation on start. To
+         * compensate, assume an initial slope of 1, then progressively use the
+         * estimated slope. */
+        slope = (clock->count * slope + (SC_CLOCK_RANGE - clock->count))
+              / SC_CLOCK_RANGE;
+    }
+
+    struct sc_clock_point global_avg = {
+        .system = (clock->left_sum.system + clock->right_sum.system)
+                 / clock->count,
+        .stream = (clock->left_sum.stream + clock->right_sum.stream)
+                 / clock->count,
+    };
+
+    sc_tick offset = global_avg.system - (sc_tick) (global_avg.stream * slope);
+
+    *out_slope = slope;
+    *out_offset = offset;
+}
+
+void
+sc_clock_update(struct sc_clock *clock, sc_tick system, sc_tick stream) {
+    struct sc_clock_point *point = &clock->points[clock->head];
+
+    if (clock->count == SC_CLOCK_RANGE || clock->count & 1) {
+        // One point passes from the right sum to the left sum
+
+        unsigned mid;
+        if (clock->count == SC_CLOCK_RANGE) {
+            mid = (clock->head + SC_CLOCK_RANGE / 2) % SC_CLOCK_RANGE;
+        } else {
+            // Only for the first frames
+            mid = clock->count / 2;
+        }
+
+        struct sc_clock_point *mid_point = &clock->points[mid];
+        clock->left_sum.system += mid_point->system;
+        clock->left_sum.stream += mid_point->stream;
+        clock->right_sum.system -= mid_point->system;
+        clock->right_sum.stream -= mid_point->stream;
+    }
+
+    if (clock->count == SC_CLOCK_RANGE) {
+        // The current point overwrites the previous value in the circular
+        // array, update the left sum accordingly
+        clock->left_sum.system -= point->system;
+        clock->left_sum.stream -= point->stream;
+    } else {
+        ++clock->count;
+    }
+
+    point->system = system;
+    point->stream = stream;
+
+    clock->right_sum.system += system;
+    clock->right_sum.stream += stream;
+
+    clock->head = (clock->head + 1) % SC_CLOCK_RANGE;
+
+    if (clock->count > 1) {
+        // Update estimation
+        sc_clock_estimate(clock, &clock->slope, &clock->offset);
+
+#ifndef SC_CLOCK_NDEBUG
+        LOGD("Clock estimation: %g * pts + %" PRItick,
+             clock->slope, clock->offset);
+#endif
+    }
+}
+
+sc_tick
+sc_clock_to_system_time(struct sc_clock *clock, sc_tick stream) {
+    assert(clock->count > 1); // sc_clock_update() must have been called
+    return (sc_tick) (stream * clock->slope) + clock->offset;
+}

app/src/clock.h

@@ -0,0 +1,70 @@
+#ifndef SC_CLOCK_H
+#define SC_CLOCK_H
+
+#include "common.h"
+
+#include <assert.h>
+
+#include "util/tick.h"
+
+#define SC_CLOCK_RANGE 32
+static_assert(!(SC_CLOCK_RANGE & 1), "SC_CLOCK_RANGE must be even");
+
+struct sc_clock_point {
+    sc_tick system;
+    sc_tick stream;
+};
+
+/**
+ * The clock aims to estimate the affine relation between the stream (device)
+ * time and the system time:
+ *
+ *     f(stream) = slope * stream + offset
+ *
+ * To that end, it stores the SC_CLOCK_RANGE last clock points (the timestamps
+ * of a frame expressed both in stream time and system time) in a circular
+ * array.
+ *
+ * To estimate the slope, it splits the last SC_CLOCK_RANGE points into two
+ * sets of SC_CLOCK_RANGE/2 points, and compute their centroid ("average
+ * point"). The slope of the estimated affine function is that of the line
+ * passing through these two points.
+ *
+ * To estimate the offset, it computes the centroid of all the SC_CLOCK_RANGE
+ * points. The resulting affine function passes by this centroid.
+ *
+ * With a circular array, the rolling sums (and average) are quick to compute.
+ * In practice, the estimation is stable and the evolution is smooth.
+ */
+struct sc_clock {
+    // Circular array
+    struct sc_clock_point points[SC_CLOCK_RANGE];
+
+    // Number of points in the array (count <= SC_CLOCK_RANGE)
+    unsigned count;
+
+    // Index of the next point to write
+    unsigned head;
+
+    // Sum of the first count/2 points
+    struct sc_clock_point left_sum;
+
+    // Sum of the last (count+1)/2 points
+    struct sc_clock_point right_sum;
+
+    // Estimated slope and offset
+    // (computed on sc_clock_update(), used by sc_clock_to_system_time())
+    double slope;
+    sc_tick offset;
+};
+
+void
+sc_clock_init(struct sc_clock *clock);
+
+void
+sc_clock_update(struct sc_clock *clock, sc_tick system, sc_tick stream);
+
+sc_tick
+sc_clock_to_system_time(struct sc_clock *clock, sc_tick stream);
+
+#endif

app/src/common.h

@@ -8,4 +8,7 @@
 #define MIN(X,Y) (X) < (Y) ? (X) : (Y)
 #define MAX(X,Y) (X) > (Y) ? (X) : (Y)
 
+#define container_of(ptr, type, member) \
+    ((type *) (((char *) (ptr)) - offsetof(type, member)))
+
 #endif

app/src/compat.c

@@ -0,0 +1,14 @@
+#include "compat.h"
+
+#include "config.h"
+
+#ifndef HAVE_STRDUP
+char *strdup(const char *s) {
+    size_t size = strlen(s) + 1;
+    char *dup = malloc(size);
+    if (dup) {
+        memcpy(dup, s, size);
+    }
+    return dup;
+}
+#endif

app/src/compat.h

@@ -8,20 +8,9 @@
 # define _DARWIN_C_SOURCE
 #endif
 
-#include <libavcodec/version.h>
 #include <libavformat/version.h>
 #include <SDL2/SDL_version.h>
 
-// In ffmpeg/doc/APIchanges:
-// 2016-04-11 - 6f69f7a / 9200514 - lavf 57.33.100 / 57.5.0 - avformat.h
-//   Add AVStream.codecpar, deprecate AVStream.codec.
-#if    (LIBAVFORMAT_VERSION_MICRO >= 100 /* FFmpeg */ && \
-        LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(57, 33, 100)) \
-    || (LIBAVFORMAT_VERSION_MICRO < 100 && /* Libav */ \
-        LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(57, 5, 0))
-# define SCRCPY_LAVF_HAS_NEW_CODEC_PARAMS_API
-#endif
-
 // In ffmpeg/doc/APIchanges:
 // 2018-02-06 - 0694d87024 - lavf 58.9.100 - avformat.h
 //   Deprecate use of av_register_input_format(), av_register_output_format(),
@@ -33,13 +22,16 @@
 # define SCRCPY_LAVF_REQUIRES_REGISTER_ALL
 #endif
 
+
 // In ffmpeg/doc/APIchanges:
-// 2016-04-21 - 7fc329e - lavc 57.37.100 - avcodec.h
-//   Add a new audio/video encoding and decoding API with decoupled input
-//   and output -- avcodec_send_packet(), avcodec_receive_frame(),
-//   avcodec_send_frame() and avcodec_receive_packet().
-#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57, 37, 100)
-# define SCRCPY_LAVF_HAS_NEW_ENCODING_DECODING_API
+// 2018-01-28 - ea3672b7d6 - lavf 58.7.100 - avformat.h
+//   Deprecate AVFormatContext filename field which had limited length, use the
+//   new dynamically allocated url field instead.
+//
+// 2018-01-28 - ea3672b7d6 - lavf 58.7.100 - avformat.h
+//   Add url field to AVFormatContext and add ff_format_set_url helper function.
+#if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(58, 7, 100)
+# define SCRCPY_LAVF_HAS_AVFORMATCONTEXT_URL
 #endif
 
 #if SDL_VERSION_ATLEAST(2, 0, 5)
@@ -56,4 +48,8 @@
 # define SCRCPY_SDL_HAS_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR
 #endif
 
+#ifndef HAVE_STRDUP
+char *strdup(const char *s);
+#endif
+
 #endif

app/src/control_msg.c

@@ -1,12 +1,60 @@
 #include "control_msg.h"
 
 #include <assert.h>
+#include <inttypes.h>
+#include <stdlib.h>
 #include <string.h>
 
 #include "util/buffer_util.h"
 #include "util/log.h"
 #include "util/str_util.h"
 
+/**
+ * Map an enum value to a string based on an array, without crashing on an
+ * out-of-bounds index.
+ */
+#define ENUM_TO_LABEL(labels, value) \
+    ((size_t) (value) < ARRAY_LEN(labels) ? labels[value] : "???")
+
+#define KEYEVENT_ACTION_LABEL(value) \
+    ENUM_TO_LABEL(android_keyevent_action_labels, value)
+
+#define MOTIONEVENT_ACTION_LABEL(value) \
+    ENUM_TO_LABEL(android_motionevent_action_labels, value)
+
+#define SCREEN_POWER_MODE_LABEL(value) \
+    ENUM_TO_LABEL(screen_power_mode_labels, value)
+
+static const char *const android_keyevent_action_labels[] = {
+    "down",
+    "up",
+    "multi",
+};
+
+static const char *const android_motionevent_action_labels[] = {
+    "down",
+    "up",
+    "move",
+    "cancel",
+    "outside",
+    "ponter-down",
+    "pointer-up",
+    "hover-move",
+    "scroll",
+    "hover-enter"
+    "hover-exit",
+    "btn-press",
+    "btn-release",
+};
+
+static const char *const screen_power_mode_labels[] = {
+    "off",
+    "doze",
+    "normal",
+    "doze-suspend",
+    "suspend",
+};
+
 static void
 write_position(uint8_t *buf, const struct position *position) {
     buffer_write32be(&buf[0], position->point.x);
@@ -66,6 +114,9 @@ control_msg_serialize(const struct control_msg *msg, unsigned char *buf) {
             buffer_write32be(&buf[17],
                              (uint32_t) msg->inject_scroll_event.vscroll);
             return 21;
+        case CONTROL_MSG_TYPE_BACK_OR_SCREEN_ON:
+            buf[1] = msg->inject_keycode.action;
+            return 2;
         case CONTROL_MSG_TYPE_SET_CLIPBOARD: {
             buf[1] = !!msg->set_clipboard.paste;
             size_t len = write_string(msg->set_clipboard.text,
@@ -76,9 +127,9 @@ control_msg_serialize(const struct control_msg *msg, unsigned char *buf) {
         case CONTROL_MSG_TYPE_SET_SCREEN_POWER_MODE:
             buf[1] = msg->set_screen_power_mode.mode;
             return 2;
-        case CONTROL_MSG_TYPE_BACK_OR_SCREEN_ON:
         case CONTROL_MSG_TYPE_EXPAND_NOTIFICATION_PANEL:
-        case CONTROL_MSG_TYPE_COLLAPSE_NOTIFICATION_PANEL:
+        case CONTROL_MSG_TYPE_EXPAND_SETTINGS_PANEL:
+        case CONTROL_MSG_TYPE_COLLAPSE_PANELS:
         case CONTROL_MSG_TYPE_GET_CLIPBOARD:
         case CONTROL_MSG_TYPE_ROTATE_DEVICE:
             // no additional data
@@ -89,14 +140,102 @@ control_msg_serialize(const struct control_msg *msg, unsigned char *buf) {
     }
 }
 
+void
+control_msg_log(const struct control_msg *msg) {
+#define LOG_CMSG(fmt, ...) LOGV("input: " fmt, ## __VA_ARGS__)
+    switch (msg->type) {
+        case CONTROL_MSG_TYPE_INJECT_KEYCODE:
+            LOG_CMSG("key %-4s code=%d repeat=%" PRIu32 " meta=%06lx",
+                     KEYEVENT_ACTION_LABEL(msg->inject_keycode.action),
+                     (int) msg->inject_keycode.keycode,
+                     msg->inject_keycode.repeat,
+                     (long) msg->inject_keycode.metastate);
+            break;
+        case CONTROL_MSG_TYPE_INJECT_TEXT:
+            LOG_CMSG("text \"%s\"", msg->inject_text.text);
+            break;
+        case CONTROL_MSG_TYPE_INJECT_TOUCH_EVENT: {
+            int action = msg->inject_touch_event.action
+                       & AMOTION_EVENT_ACTION_MASK;
+            uint64_t id = msg->inject_touch_event.pointer_id;
+            if (id == POINTER_ID_MOUSE || id == POINTER_ID_VIRTUAL_FINGER) {
+                // string pointer id
+                LOG_CMSG("touch [id=%s] %-4s position=%" PRIi32 ",%" PRIi32
+                             " pressure=%g buttons=%06lx",
+                         id == POINTER_ID_MOUSE ? "mouse" : "vfinger",
+                         MOTIONEVENT_ACTION_LABEL(action),
+                         msg->inject_touch_event.position.point.x,
+                         msg->inject_touch_event.position.point.y,
+                         msg->inject_touch_event.pressure,
+                         (long) msg->inject_touch_event.buttons);
+            } else {
+                // numeric pointer id
+#ifndef __WIN32
+# define PRIu64_ PRIu64
+#else
+# define PRIu64_ "I64u"  // Windows...
+#endif
+                LOG_CMSG("touch [id=%" PRIu64_ "] %-4s position=%" PRIi32 ",%"
+                             PRIi32 " pressure=%g buttons=%06lx",
+                         id,
+                         MOTIONEVENT_ACTION_LABEL(action),
+                         msg->inject_touch_event.position.point.x,
+                         msg->inject_touch_event.position.point.y,
+                         msg->inject_touch_event.pressure,
+                         (long) msg->inject_touch_event.buttons);
+            }
+            break;
+        }
+        case CONTROL_MSG_TYPE_INJECT_SCROLL_EVENT:
+            LOG_CMSG("scroll position=%" PRIi32 ",%" PRIi32 " hscroll=%" PRIi32
+                         " vscroll=%" PRIi32,
+                     msg->inject_scroll_event.position.point.x,
+                     msg->inject_scroll_event.position.point.y,
+                     msg->inject_scroll_event.hscroll,
+                     msg->inject_scroll_event.vscroll);
+            break;
+        case CONTROL_MSG_TYPE_BACK_OR_SCREEN_ON:
+            LOG_CMSG("back-or-screen-on %s",
+                     KEYEVENT_ACTION_LABEL(msg->inject_keycode.action));
+            break;
+        case CONTROL_MSG_TYPE_SET_CLIPBOARD:
+            LOG_CMSG("clipboard %s \"%s\"",
+                     msg->set_clipboard.paste ? "paste" : "copy",
+                     msg->set_clipboard.text);
+            break;
+        case CONTROL_MSG_TYPE_SET_SCREEN_POWER_MODE:
+            LOG_CMSG("power mode %s",
+                     SCREEN_POWER_MODE_LABEL(msg->set_screen_power_mode.mode));
+            break;
+        case CONTROL_MSG_TYPE_EXPAND_NOTIFICATION_PANEL:
+            LOG_CMSG("expand notification panel");
+            break;
+        case CONTROL_MSG_TYPE_EXPAND_SETTINGS_PANEL:
+            LOG_CMSG("expand settings panel");
+            break;
+        case CONTROL_MSG_TYPE_COLLAPSE_PANELS:
+            LOG_CMSG("collapse panels");
+            break;
+        case CONTROL_MSG_TYPE_GET_CLIPBOARD:
+            LOG_CMSG("get clipboard");
+            break;
+        case CONTROL_MSG_TYPE_ROTATE_DEVICE:
+            LOG_CMSG("rotate device");
+            break;
+        default:
+            LOG_CMSG("unknown type: %u", (unsigned) msg->type);
+            break;
+    }
+}
+
 void
 control_msg_destroy(struct control_msg *msg) {
     switch (msg->type) {
         case CONTROL_MSG_TYPE_INJECT_TEXT:
-            SDL_free(msg->inject_text.text);
+            free(msg->inject_text.text);
             break;
         case CONTROL_MSG_TYPE_SET_CLIPBOARD:
-            SDL_free(msg->set_clipboard.text);
+            free(msg->set_clipboard.text);
             break;
         default:
             // do nothing

app/src/control_msg.h

@@ -17,8 +17,8 @@
 // type: 1 byte; paste flag: 1 byte; length: 4 bytes
 #define CONTROL_MSG_CLIPBOARD_TEXT_MAX_LENGTH (CONTROL_MSG_MAX_SIZE - 6)
 
-#define POINTER_ID_MOUSE UINT64_C(-1);
-#define POINTER_ID_VIRTUAL_FINGER UINT64_C(-2);
+#define POINTER_ID_MOUSE UINT64_C(-1)
+#define POINTER_ID_VIRTUAL_FINGER UINT64_C(-2)
 
 enum control_msg_type {
     CONTROL_MSG_TYPE_INJECT_KEYCODE,
@@ -27,7 +27,8 @@ enum control_msg_type {
     CONTROL_MSG_TYPE_INJECT_SCROLL_EVENT,
     CONTROL_MSG_TYPE_BACK_OR_SCREEN_ON,
     CONTROL_MSG_TYPE_EXPAND_NOTIFICATION_PANEL,
-    CONTROL_MSG_TYPE_COLLAPSE_NOTIFICATION_PANEL,
+    CONTROL_MSG_TYPE_EXPAND_SETTINGS_PANEL,
+    CONTROL_MSG_TYPE_COLLAPSE_PANELS,
     CONTROL_MSG_TYPE_GET_CLIPBOARD,
     CONTROL_MSG_TYPE_SET_CLIPBOARD,
     CONTROL_MSG_TYPE_SET_SCREEN_POWER_MODE,
@@ -50,7 +51,7 @@ struct control_msg {
             enum android_metastate metastate;
         } inject_keycode;
         struct {
-            char *text; // owned, to be freed by SDL_free()
+            char *text; // owned, to be freed by free()
         } inject_text;
         struct {
             enum android_motionevent_action action;
@@ -65,7 +66,11 @@ struct control_msg {
             int32_t vscroll;
         } inject_scroll_event;
         struct {
-            char *text; // owned, to be freed by SDL_free()
+            enum android_keyevent_action action; // action for the BACK key
+            // screen may only be turned on on ACTION_DOWN
+        } back_or_screen_on;
+        struct {
+            char *text; // owned, to be freed by free()
             bool paste;
         } set_clipboard;
         struct {
@@ -79,6 +84,9 @@ struct control_msg {
 size_t
 control_msg_serialize(const struct control_msg *msg, unsigned char *buf);
 
+void
+control_msg_log(const struct control_msg *msg);
+
 void
 control_msg_destroy(struct control_msg *msg);
 

app/src/controller.c

@@ -2,25 +2,27 @@
 
 #include <assert.h>
 
-#include "util/lock.h"
 #include "util/log.h"
 
 bool
 controller_init(struct controller *controller, socket_t control_socket) {
     cbuf_init(&controller->queue);
 
-    if (!receiver_init(&controller->receiver, control_socket)) {
+    bool ok = receiver_init(&controller->receiver, control_socket);
+    if (!ok) {
         return false;
     }
 
-    if (!(controller->mutex = SDL_CreateMutex())) {
+    ok = sc_mutex_init(&controller->mutex);
+    if (!ok) {
         receiver_destroy(&controller->receiver);
         return false;
     }
 
-    if (!(controller->msg_cond = SDL_CreateCond())) {
+    ok = sc_cond_init(&controller->msg_cond);
+    if (!ok) {
         receiver_destroy(&controller->receiver);
-        SDL_DestroyMutex(controller->mutex);
+        sc_mutex_destroy(&controller->mutex);
         return false;
     }
 
@@ -32,8 +34,8 @@ controller_init(struct controller *controller, socket_t control_socket) {
 
 void
 controller_destroy(struct controller *controller) {
-    SDL_DestroyCond(controller->msg_cond);
-    SDL_DestroyMutex(controller->mutex);
+    sc_cond_destroy(&controller->msg_cond);
+    sc_mutex_destroy(&controller->mutex);
 
     struct control_msg msg;
     while (cbuf_take(&controller->queue, &msg)) {
@@ -46,13 +48,17 @@ controller_destroy(struct controller *controller) {
 bool
 controller_push_msg(struct controller *controller,
                       const struct control_msg *msg) {
-    mutex_lock(controller->mutex);
+    if (sc_get_log_level() <= SC_LOG_LEVEL_VERBOSE) {
+        control_msg_log(msg);
+    }
+
+    sc_mutex_lock(&controller->mutex);
     bool was_empty = cbuf_is_empty(&controller->queue);
     bool res = cbuf_push(&controller->queue, *msg);
     if (was_empty) {
-        cond_signal(controller->msg_cond);
+        sc_cond_signal(&controller->msg_cond);
     }
-    mutex_unlock(controller->mutex);
+    sc_mutex_unlock(&controller->mutex);
     return res;
 }
 
@@ -73,20 +79,20 @@ run_controller(void *data) {
     struct controller *controller = data;
 
     for (;;) {
-        mutex_lock(controller->mutex);
+        sc_mutex_lock(&controller->mutex);
         while (!controller->stopped && cbuf_is_empty(&controller->queue)) {
-            cond_wait(controller->msg_cond, controller->mutex);
+            sc_cond_wait(&controller->msg_cond, &controller->mutex);
         }
         if (controller->stopped) {
             // stop immediately, do not process further msgs
-            mutex_unlock(controller->mutex);
+            sc_mutex_unlock(&controller->mutex);
             break;
         }
         struct control_msg msg;
         bool non_empty = cbuf_take(&controller->queue, &msg);
         assert(non_empty);
         (void) non_empty;
-        mutex_unlock(controller->mutex);
+        sc_mutex_unlock(&controller->mutex);
 
         bool ok = process_msg(controller, &msg);
         control_msg_destroy(&msg);
@@ -102,16 +108,16 @@ bool
 controller_start(struct controller *controller) {
     LOGD("Starting controller thread");
 
-    controller->thread = SDL_CreateThread(run_controller, "controller",
-                                          controller);
-    if (!controller->thread) {
+    bool ok = sc_thread_create(&controller->thread, run_controller,
+                               "controller", controller);
+    if (!ok) {
         LOGC("Could not start controller thread");
         return false;
     }
 
     if (!receiver_start(&controller->receiver)) {
         controller_stop(controller);
-        SDL_WaitThread(controller->thread, NULL);
+        sc_thread_join(&controller->thread, NULL);
         return false;
     }
 
@@ -120,14 +126,14 @@ controller_start(struct controller *controller) {
 
 void
 controller_stop(struct controller *controller) {
-    mutex_lock(controller->mutex);
+    sc_mutex_lock(&controller->mutex);
     controller->stopped = true;
-    cond_signal(controller->msg_cond);
-    mutex_unlock(controller->mutex);
+    sc_cond_signal(&controller->msg_cond);
+    sc_mutex_unlock(&controller->mutex);
 }
 
 void
 controller_join(struct controller *controller) {
-    SDL_WaitThread(controller->thread, NULL);
+    sc_thread_join(&controller->thread, NULL);
     receiver_join(&controller->receiver);
 }

app/src/controller.h

@@ -4,21 +4,20 @@
 #include "common.h"
 
 #include <stdbool.h>
-#include <SDL2/SDL_mutex.h>
-#include <SDL2/SDL_thread.h>
 
 #include "control_msg.h"
 #include "receiver.h"
 #include "util/cbuf.h"
 #include "util/net.h"
+#include "util/thread.h"
 
 struct control_msg_queue CBUF(struct control_msg, 64);
 
 struct controller {
     socket_t control_socket;
-    SDL_Thread *thread;
-    SDL_mutex *mutex;
-    SDL_cond *msg_cond;
+    sc_thread thread;
+    sc_mutex mutex;
+    sc_cond msg_cond;
     bool stopped;
     struct control_msg_queue queue;
     struct receiver receiver;

app/src/decoder.c

@@ -1,40 +1,43 @@
 #include "decoder.h"
 
 #include <libavformat/avformat.h>
-#include <libavutil/time.h>
-#include <SDL2/SDL_events.h>
-#include <SDL2/SDL_mutex.h>
-#include <SDL2/SDL_thread.h>
-#include <unistd.h>
 
 #include "events.h"
-#include "recorder.h"
 #include "video_buffer.h"
-#include "util/buffer_util.h"
+#include "trait/frame_sink.h"
 #include "util/log.h"
 
-// set the decoded frame as ready for rendering, and notify
+/** Downcast packet_sink to decoder */
+#define DOWNCAST(SINK) container_of(SINK, struct decoder, packet_sink)
+
 static void
-push_frame(struct decoder *decoder) {
-    bool previous_frame_skipped;
-    video_buffer_offer_decoded_frame(decoder->video_buffer,
-                                     &previous_frame_skipped);
-    if (previous_frame_skipped) {
-        // the previous EVENT_NEW_FRAME will consume this frame
-        return;
+decoder_close_first_sinks(struct decoder *decoder, unsigned count) {
+    while (count) {
+        struct sc_frame_sink *sink = decoder->sinks[--count];
+        sink->ops->close(sink);
     }
-    static SDL_Event new_frame_event = {
-        .type = EVENT_NEW_FRAME,
-    };
-    SDL_PushEvent(&new_frame_event);
 }
 
-void
-decoder_init(struct decoder *decoder, struct video_buffer *vb) {
-    decoder->video_buffer = vb;
+static inline void
+decoder_close_sinks(struct decoder *decoder) {
+    decoder_close_first_sinks(decoder, decoder->sink_count);
 }
 
-bool
+static bool
+decoder_open_sinks(struct decoder *decoder) {
+    for (unsigned i = 0; i < decoder->sink_count; ++i) {
+        struct sc_frame_sink *sink = decoder->sinks[i];
+        if (!sink->ops->open(sink)) {
+            LOGE("Could not open frame sink %d", i);
+            decoder_close_first_sinks(decoder, i);
+            return false;
+        }
+    }
+
+    return true;
+}
+
+static bool
 decoder_open(struct decoder *decoder, const AVCodec *codec) {
     decoder->codec_ctx = avcodec_alloc_context3(codec);
     if (!decoder->codec_ctx) {
@@ -48,52 +51,110 @@ decoder_open(struct decoder *decoder, const AVCodec *codec) {
         return false;
     }
 
+    decoder->frame = av_frame_alloc();
+    if (!decoder->frame) {
+        LOGE("Could not create decoder frame");
+        avcodec_close(decoder->codec_ctx);
+        avcodec_free_context(&decoder->codec_ctx);
+        return false;
+    }
+
+    if (!decoder_open_sinks(decoder)) {
+        LOGE("Could not open decoder sinks");
+        av_frame_free(&decoder->frame);
+        avcodec_close(decoder->codec_ctx);
+        avcodec_free_context(&decoder->codec_ctx);
+        return false;
+    }
+
     return true;
 }
 
-void
+static void
 decoder_close(struct decoder *decoder) {
+    decoder_close_sinks(decoder);
+    av_frame_free(&decoder->frame);
     avcodec_close(decoder->codec_ctx);
     avcodec_free_context(&decoder->codec_ctx);
 }
 
-bool
+static bool
+push_frame_to_sinks(struct decoder *decoder, const AVFrame *frame) {
+    for (unsigned i = 0; i < decoder->sink_count; ++i) {
+        struct sc_frame_sink *sink = decoder->sinks[i];
+        if (!sink->ops->push(sink, frame)) {
+            LOGE("Could not send frame to sink %d", i);
+            return false;
+        }
+    }
+
+    return true;
+}
+
+static bool
 decoder_push(struct decoder *decoder, const AVPacket *packet) {
-// the new decoding/encoding API has been introduced by:
-// <http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=7fc329e2dd6226dfecaa4a1d7adf353bf2773726>
-#ifdef SCRCPY_LAVF_HAS_NEW_ENCODING_DECODING_API
-    int ret;
-    if ((ret = avcodec_send_packet(decoder->codec_ctx, packet)) < 0) {
+    bool is_config = packet->pts == AV_NOPTS_VALUE;
+    if (is_config) {
+        // nothing to do
+        return true;
+    }
+
+    int ret = avcodec_send_packet(decoder->codec_ctx, packet);
+    if (ret < 0 && ret != AVERROR(EAGAIN)) {
         LOGE("Could not send video packet: %d", ret);
         return false;
     }
-    ret = avcodec_receive_frame(decoder->codec_ctx,
-                                decoder->video_buffer->decoding_frame);
+    ret = avcodec_receive_frame(decoder->codec_ctx, decoder->frame);
     if (!ret) {
         // a frame was received
-        push_frame(decoder);
+        bool ok = push_frame_to_sinks(decoder, decoder->frame);
+        // A frame lost should not make the whole pipeline fail. The error, if
+        // any, is already logged.
+        (void) ok;
+
+        av_frame_unref(decoder->frame);
     } else if (ret != AVERROR(EAGAIN)) {
         LOGE("Could not receive video frame: %d", ret);
         return false;
     }
-#else
-    int got_picture;
-    int len = avcodec_decode_video2(decoder->codec_ctx,
-                                    decoder->video_buffer->decoding_frame,
-                                    &got_picture,
-                                    packet);
-    if (len < 0) {
-        LOGE("Could not decode video packet: %d", len);
-        return false;
-    }
-    if (got_picture) {
-        push_frame(decoder);
-    }
-#endif
     return true;
 }
 
-void
-decoder_interrupt(struct decoder *decoder) {
-    video_buffer_interrupt(decoder->video_buffer);
+static bool
+decoder_packet_sink_open(struct sc_packet_sink *sink, const AVCodec *codec) {
+    struct decoder *decoder = DOWNCAST(sink);
+    return decoder_open(decoder, codec);
+}
+
+static void
+decoder_packet_sink_close(struct sc_packet_sink *sink) {
+    struct decoder *decoder = DOWNCAST(sink);
+    decoder_close(decoder);
+}
+
+static bool
+decoder_packet_sink_push(struct sc_packet_sink *sink, const AVPacket *packet) {
+    struct decoder *decoder = DOWNCAST(sink);
+    return decoder_push(decoder, packet);
+}
+
+void
+decoder_init(struct decoder *decoder) {
+    decoder->sink_count = 0;
+
+    static const struct sc_packet_sink_ops ops = {
+        .open = decoder_packet_sink_open,
+        .close = decoder_packet_sink_close,
+        .push = decoder_packet_sink_push,
+    };
+
+    decoder->packet_sink.ops = &ops;
+}
+
+void
+decoder_add_sink(struct decoder *decoder, struct sc_frame_sink *sink) {
+    assert(decoder->sink_count < DECODER_MAX_SINKS);
+    assert(sink);
+    assert(sink->ops);
+    decoder->sinks[decoder->sink_count++] = sink;
 }

app/src/decoder.h

@@ -3,29 +3,27 @@
 
 #include "common.h"
 
+#include "trait/packet_sink.h"
+
 #include <stdbool.h>
 #include <libavformat/avformat.h>
 
-struct video_buffer;
+#define DECODER_MAX_SINKS 2
 
 struct decoder {
-    struct video_buffer *video_buffer;
+    struct sc_packet_sink packet_sink; // packet sink trait
+
+    struct sc_frame_sink *sinks[DECODER_MAX_SINKS];
+    unsigned sink_count;
+
     AVCodecContext *codec_ctx;
+    AVFrame *frame;
 };
 
 void
-decoder_init(struct decoder *decoder, struct video_buffer *vb);
-
-bool
-decoder_open(struct decoder *decoder, const AVCodec *codec);
+decoder_init(struct decoder *decoder);
 
 void
-decoder_close(struct decoder *decoder);
-
-bool
-decoder_push(struct decoder *decoder, const AVPacket *packet);
-
-void
-decoder_interrupt(struct decoder *decoder);
+decoder_add_sink(struct decoder *decoder, struct sc_frame_sink *sink);
 
 #endif

app/src/device.c

@@ -1,23 +0,0 @@
-#include "device.h"
-
-#include "util/log.h"
-
-bool
-device_read_info(socket_t device_socket, char *device_name, struct size *size) {
-    unsigned char buf[DEVICE_NAME_FIELD_LENGTH + 4];
-    int r = net_recv_all(device_socket, buf, sizeof(buf));
-    if (r < DEVICE_NAME_FIELD_LENGTH + 4) {
-        LOGE("Could not retrieve device information");
-        return false;
-    }
-    // in case the client sends garbage
-    buf[DEVICE_NAME_FIELD_LENGTH - 1] = '\0';
-    // strcpy is safe here, since name contains at least
-    // DEVICE_NAME_FIELD_LENGTH bytes and strlen(buf) < DEVICE_NAME_FIELD_LENGTH
-    strcpy(device_name, (char *) buf);
-    size->width = (buf[DEVICE_NAME_FIELD_LENGTH] << 8)
-            | buf[DEVICE_NAME_FIELD_LENGTH + 1];
-    size->height = (buf[DEVICE_NAME_FIELD_LENGTH + 2] << 8)
-            | buf[DEVICE_NAME_FIELD_LENGTH + 3];
-    return true;
-}

app/src/device.h

@@ -1,17 +0,0 @@
-#ifndef DEVICE_H
-#define DEVICE_H
-
-#include "common.h"
-
-#include <stdbool.h>
-
-#include "coords.h"
-#include "util/net.h"
-
-#define DEVICE_NAME_FIELD_LENGTH 64
-
-// name must be at least DEVICE_NAME_FIELD_LENGTH bytes
-bool
-device_read_info(socket_t device_socket, char *device_name, struct size *size);
-
-#endif

app/src/device_msg.c

@@ -1,5 +1,6 @@
 #include "device_msg.h"
 
+#include <stdlib.h>
 #include <string.h>
 
 #include "util/buffer_util.h"
@@ -20,7 +21,7 @@ device_msg_deserialize(const unsigned char *buf, size_t len,
             if (clipboard_len > len - 5) {
                 return 0; // not available
             }
-            char *text = SDL_malloc(clipboard_len + 1);
+            char *text = malloc(clipboard_len + 1);
             if (!text) {
                 LOGW("Could not allocate text for clipboard");
                 return -1;
@@ -42,6 +43,6 @@ device_msg_deserialize(const unsigned char *buf, size_t len,
 void
 device_msg_destroy(struct device_msg *msg) {
     if (msg->type == DEVICE_MSG_TYPE_CLIPBOARD) {
-        SDL_free(msg->clipboard.text);
+        free(msg->clipboard.text);
     }
 }

app/src/device_msg.h

@@ -19,7 +19,7 @@ struct device_msg {
     enum device_msg_type type;
     union {
         struct {
-            char *text; // owned, to be freed by SDL_free()
+            char *text; // owned, to be freed by free()
         } clipboard;
     };
 };

app/src/event_converter.c

@@ -14,7 +14,7 @@ convert_keycode_action(SDL_EventType from, enum android_keyevent_action *to) {
 
 static enum android_metastate
 autocomplete_metastate(enum android_metastate metastate) {
-    // fill dependant flags
+    // fill dependent flags
     if (metastate & (AMETA_SHIFT_LEFT_ON | AMETA_SHIFT_RIGHT_ON)) {
         metastate |= AMETA_SHIFT_ON;
     }

app/src/events.h

@@ -1,3 +1,2 @@
-#define EVENT_NEW_SESSION SDL_USEREVENT
-#define EVENT_NEW_FRAME (SDL_USEREVENT + 1)
-#define EVENT_STREAM_STOPPED (SDL_USEREVENT + 2)
+#define EVENT_NEW_FRAME       SDL_USEREVENT
+#define EVENT_STREAM_STOPPED (SDL_USEREVENT + 1)

app/src/file_handler.c

@@ -4,14 +4,13 @@
 #include <string.h>
 
 #include "adb.h"
-#include "util/lock.h"
 #include "util/log.h"
 
-#define DEFAULT_PUSH_TARGET "/sdcard/"
+#define DEFAULT_PUSH_TARGET "/sdcard/Download/"
 
 static void
 file_handler_request_destroy(struct file_handler_request *req) {
-    SDL_free(req->file);
+    free(req->file);
 }
 
 bool
@@ -20,21 +19,23 @@ file_handler_init(struct file_handler *file_handler, const char *serial,
 
     cbuf_init(&file_handler->queue);
 
-    if (!(file_handler->mutex = SDL_CreateMutex())) {
+    bool ok = sc_mutex_init(&file_handler->mutex);
+    if (!ok) {
         return false;
     }
 
-    if (!(file_handler->event_cond = SDL_CreateCond())) {
-        SDL_DestroyMutex(file_handler->mutex);
+    ok = sc_cond_init(&file_handler->event_cond);
+    if (!ok) {
+        sc_mutex_destroy(&file_handler->mutex);
         return false;
     }
 
     if (serial) {
-        file_handler->serial = SDL_strdup(serial);
+        file_handler->serial = strdup(serial);
         if (!file_handler->serial) {
             LOGW("Could not strdup serial");
-            SDL_DestroyCond(file_handler->event_cond);
-            SDL_DestroyMutex(file_handler->mutex);
+            sc_cond_destroy(&file_handler->event_cond);
+            sc_mutex_destroy(&file_handler->mutex);
             return false;
         }
     } else {
@@ -54,9 +55,9 @@ file_handler_init(struct file_handler *file_handler, const char *serial,
 
 void
 file_handler_destroy(struct file_handler *file_handler) {
-    SDL_DestroyCond(file_handler->event_cond);
-    SDL_DestroyMutex(file_handler->mutex);
-    SDL_free(file_handler->serial);
+    sc_cond_destroy(&file_handler->event_cond);
+    sc_mutex_destroy(&file_handler->mutex);
+    free(file_handler->serial);
 
     struct file_handler_request req;
     while (cbuf_take(&file_handler->queue, &req)) {
@@ -92,13 +93,13 @@ file_handler_request(struct file_handler *file_handler,
         .file = file,
     };
 
-    mutex_lock(file_handler->mutex);
+    sc_mutex_lock(&file_handler->mutex);
     bool was_empty = cbuf_is_empty(&file_handler->queue);
     bool res = cbuf_push(&file_handler->queue, req);
     if (was_empty) {
-        cond_signal(file_handler->event_cond);
+        sc_cond_signal(&file_handler->event_cond);
     }
-    mutex_unlock(file_handler->mutex);
+    sc_mutex_unlock(&file_handler->mutex);
     return res;
 }
 
@@ -107,14 +108,14 @@ run_file_handler(void *data) {
     struct file_handler *file_handler = data;
 
     for (;;) {
-        mutex_lock(file_handler->mutex);
+        sc_mutex_lock(&file_handler->mutex);
         file_handler->current_process = PROCESS_NONE;
         while (!file_handler->stopped && cbuf_is_empty(&file_handler->queue)) {
-            cond_wait(file_handler->event_cond, file_handler->mutex);
+            sc_cond_wait(&file_handler->event_cond, &file_handler->mutex);
         }
         if (file_handler->stopped) {
             // stop immediately, do not process further events
-            mutex_unlock(file_handler->mutex);
+            sc_mutex_unlock(&file_handler->mutex);
             break;
         }
         struct file_handler_request req;
@@ -132,7 +133,7 @@ run_file_handler(void *data) {
                                 file_handler->push_target);
         }
         file_handler->current_process = process;
-        mutex_unlock(file_handler->mutex);
+        sc_mutex_unlock(&file_handler->mutex);
 
         if (req.action == ACTION_INSTALL_APK) {
             if (process_check_success(process, "adb install", false)) {
@@ -150,13 +151,13 @@ run_file_handler(void *data) {
             }
         }
 
-        mutex_lock(file_handler->mutex);
+        sc_mutex_lock(&file_handler->mutex);
         // Close the process (it is necessary already terminated)
         // Execute this call with mutex locked to avoid race conditions with
         // file_handler_stop()
         process_close(file_handler->current_process);
         file_handler->current_process = PROCESS_NONE;
-        mutex_unlock(file_handler->mutex);
+        sc_mutex_unlock(&file_handler->mutex);
 
         file_handler_request_destroy(&req);
     }
@@ -167,9 +168,9 @@ bool
 file_handler_start(struct file_handler *file_handler) {
     LOGD("Starting file_handler thread");
 
-    file_handler->thread = SDL_CreateThread(run_file_handler, "file_handler",
-                                            file_handler);
-    if (!file_handler->thread) {
+    bool ok = sc_thread_create(&file_handler->thread, run_file_handler,
+                               "file_handler", file_handler);
+    if (!ok) {
         LOGC("Could not start file_handler thread");
         return false;
     }
@@ -179,18 +180,18 @@ file_handler_start(struct file_handler *file_handler) {
 
 void
 file_handler_stop(struct file_handler *file_handler) {
-    mutex_lock(file_handler->mutex);
+    sc_mutex_lock(&file_handler->mutex);
     file_handler->stopped = true;
-    cond_signal(file_handler->event_cond);
+    sc_cond_signal(&file_handler->event_cond);
     if (file_handler->current_process != PROCESS_NONE) {
         if (!process_terminate(file_handler->current_process)) {
             LOGW("Could not terminate push/install process");
         }
     }
-    mutex_unlock(file_handler->mutex);
+    sc_mutex_unlock(&file_handler->mutex);
 }
 
 void
 file_handler_join(struct file_handler *file_handler) {
-    SDL_WaitThread(file_handler->thread, NULL);
+    sc_thread_join(&file_handler->thread, NULL);
 }

app/src/file_handler.h

@@ -4,11 +4,10 @@
 #include "common.h"
 
 #include <stdbool.h>
-#include <SDL2/SDL_mutex.h>
-#include <SDL2/SDL_thread.h>
 
 #include "adb.h"
 #include "util/cbuf.h"
+#include "util/thread.h"
 
 typedef enum {
     ACTION_INSTALL_APK,
@@ -25,9 +24,9 @@ struct file_handler_request_queue CBUF(struct file_handler_request, 16);
 struct file_handler {
     char *serial;
     const char *push_target;
-    SDL_Thread *thread;
-    SDL_mutex *mutex;
-    SDL_cond *event_cond;
+    sc_thread thread;
+    sc_mutex mutex;
+    sc_cond event_cond;
     bool stopped;
     bool initialized;
     process_t current_process;
@@ -50,7 +49,7 @@ file_handler_stop(struct file_handler *file_handler);
 void
 file_handler_join(struct file_handler *file_handler);
 
-// take ownership of file, and will SDL_free() it
+// take ownership of file, and will free() it
 bool
 file_handler_request(struct file_handler *file_handler,
                      file_handler_action_t action,

app/src/fps_counter.c

@@ -1,27 +1,25 @@
 #include "fps_counter.h"
 
 #include <assert.h>
-#include <SDL2/SDL_timer.h>
 
-#include "util/lock.h"
 #include "util/log.h"
 
-#define FPS_COUNTER_INTERVAL_MS 1000
+#define FPS_COUNTER_INTERVAL SC_TICK_FROM_SEC(1)
 
 bool
 fps_counter_init(struct fps_counter *counter) {
-    counter->mutex = SDL_CreateMutex();
-    if (!counter->mutex) {
+    bool ok = sc_mutex_init(&counter->mutex);
+    if (!ok) {
         return false;
     }
 
-    counter->state_cond = SDL_CreateCond();
-    if (!counter->state_cond) {
-        SDL_DestroyMutex(counter->mutex);
+    ok = sc_cond_init(&counter->state_cond);
+    if (!ok) {
+        sc_mutex_destroy(&counter->mutex);
         return false;
     }
 
-    counter->thread = NULL;
+    counter->thread_started = false;
     atomic_init(&counter->started, 0);
     // no need to initialize the other fields, they are unused until started
 
@@ -30,8 +28,8 @@ fps_counter_init(struct fps_counter *counter) {
 
 void
 fps_counter_destroy(struct fps_counter *counter) {
-    SDL_DestroyCond(counter->state_cond);
-    SDL_DestroyMutex(counter->mutex);
+    sc_cond_destroy(&counter->state_cond);
+    sc_mutex_destroy(&counter->mutex);
 }
 
 static inline bool
@@ -48,7 +46,7 @@ set_started(struct fps_counter *counter, bool started) {
 static void
 display_fps(struct fps_counter *counter) {
     unsigned rendered_per_second =
-        counter->nr_rendered * 1000 / FPS_COUNTER_INTERVAL_MS;
+        counter->nr_rendered * SC_TICK_FREQ / FPS_COUNTER_INTERVAL;
     if (counter->nr_skipped) {
         LOGI("%u fps (+%u frames skipped)", rendered_per_second,
                                             counter->nr_skipped);
@@ -69,53 +67,54 @@ check_interval_expired(struct fps_counter *counter, uint32_t now) {
     counter->nr_skipped = 0;
     // add a multiple of the interval
     uint32_t elapsed_slices =
-        (now - counter->next_timestamp) / FPS_COUNTER_INTERVAL_MS + 1;
-    counter->next_timestamp += FPS_COUNTER_INTERVAL_MS * elapsed_slices;
+        (now - counter->next_timestamp) / FPS_COUNTER_INTERVAL + 1;
+    counter->next_timestamp += FPS_COUNTER_INTERVAL * elapsed_slices;
 }
 
 static int
 run_fps_counter(void *data) {
     struct fps_counter *counter = data;
 
-    mutex_lock(counter->mutex);
+    sc_mutex_lock(&counter->mutex);
     while (!counter->interrupted) {
         while (!counter->interrupted && !is_started(counter)) {
-            cond_wait(counter->state_cond, counter->mutex);
+            sc_cond_wait(&counter->state_cond, &counter->mutex);
         }
         while (!counter->interrupted && is_started(counter)) {
-            uint32_t now = SDL_GetTicks();
+            sc_tick now = sc_tick_now();
             check_interval_expired(counter, now);
 
-            assert(counter->next_timestamp > now);
-            uint32_t remaining = counter->next_timestamp - now;
-
             // ignore the reason (timeout or signaled), we just loop anyway
-            cond_wait_timeout(counter->state_cond, counter->mutex, remaining);
+            sc_cond_timedwait(&counter->state_cond, &counter->mutex,
+                              counter->next_timestamp);
         }
     }
-    mutex_unlock(counter->mutex);
+    sc_mutex_unlock(&counter->mutex);
     return 0;
 }
 
 bool
 fps_counter_start(struct fps_counter *counter) {
-    mutex_lock(counter->mutex);
-    counter->next_timestamp = SDL_GetTicks() + FPS_COUNTER_INTERVAL_MS;
+    sc_mutex_lock(&counter->mutex);
+    counter->next_timestamp = sc_tick_now() + FPS_COUNTER_INTERVAL;
     counter->nr_rendered = 0;
     counter->nr_skipped = 0;
-    mutex_unlock(counter->mutex);
+    sc_mutex_unlock(&counter->mutex);
 
     set_started(counter, true);
-    cond_signal(counter->state_cond);
+    sc_cond_signal(&counter->state_cond);
 
-    // counter->thread is always accessed from the same thread, no need to lock
-    if (!counter->thread) {
-        counter->thread =
-            SDL_CreateThread(run_fps_counter, "fps counter", counter);
-        if (!counter->thread) {
+    // counter->thread_started and counter->thread are always accessed from the
+    // same thread, no need to lock
+    if (!counter->thread_started) {
+        bool ok = sc_thread_create(&counter->thread, run_fps_counter,
+                                   "fps counter", counter);
+        if (!ok) {
             LOGE("Could not start FPS counter thread");
             return false;
         }
+
+        counter->thread_started = true;
     }
 
     return true;
@@ -124,7 +123,7 @@ fps_counter_start(struct fps_counter *counter) {
 void
 fps_counter_stop(struct fps_counter *counter) {
     set_started(counter, false);
-    cond_signal(counter->state_cond);
+    sc_cond_signal(&counter->state_cond);
 }
 
 bool
@@ -134,21 +133,25 @@ fps_counter_is_started(struct fps_counter *counter) {
 
 void
 fps_counter_interrupt(struct fps_counter *counter) {
-    if (!counter->thread) {
+    if (!counter->thread_started) {
         return;
     }
 
-    mutex_lock(counter->mutex);
+    sc_mutex_lock(&counter->mutex);
     counter->interrupted = true;
-    mutex_unlock(counter->mutex);
+    sc_mutex_unlock(&counter->mutex);
     // wake up blocking wait
-    cond_signal(counter->state_cond);
+    sc_cond_signal(&counter->state_cond);
 }
 
 void
 fps_counter_join(struct fps_counter *counter) {
-    if (counter->thread) {
-        SDL_WaitThread(counter->thread, NULL);
+    if (counter->thread_started) {
+        // interrupted must be set by the thread calling join(), so no need to
+        // lock for the assertion
+        assert(counter->interrupted);
+
+        sc_thread_join(&counter->thread, NULL);
     }
 }
 
@@ -158,11 +161,11 @@ fps_counter_add_rendered_frame(struct fps_counter *counter) {
         return;
     }
 
-    mutex_lock(counter->mutex);
-    uint32_t now = SDL_GetTicks();
+    sc_mutex_lock(&counter->mutex);
+    sc_tick now = sc_tick_now();
     check_interval_expired(counter, now);
     ++counter->nr_rendered;
-    mutex_unlock(counter->mutex);
+    sc_mutex_unlock(&counter->mutex);
 }
 
 void
@@ -171,9 +174,9 @@ fps_counter_add_skipped_frame(struct fps_counter *counter) {
         return;
     }
 
-    mutex_lock(counter->mutex);
-    uint32_t now = SDL_GetTicks();
+    sc_mutex_lock(&counter->mutex);
+    sc_tick now = sc_tick_now();
     check_interval_expired(counter, now);
     ++counter->nr_skipped;
-    mutex_unlock(counter->mutex);
+    sc_mutex_unlock(&counter->mutex);
 }

app/src/fps_counter.h

@@ -6,13 +6,15 @@
 #include <stdatomic.h>
 #include <stdbool.h>
 #include <stdint.h>
-#include <SDL2/SDL_mutex.h>
-#include <SDL2/SDL_thread.h>
+
+#include "util/thread.h"
 
 struct fps_counter {
-    SDL_Thread *thread;
-    SDL_mutex *mutex;
-    SDL_cond *state_cond;
+    sc_thread thread;
+    sc_mutex mutex;
+    sc_cond state_cond;
+
+    bool thread_started;
 
     // atomic so that we can check without locking the mutex
     // if the FPS counter is disabled, we don't want to lock unnecessarily
@@ -22,7 +24,7 @@ struct fps_counter {
     bool interrupted;
     unsigned nr_rendered;
     unsigned nr_skipped;
-    uint32_t next_timestamp;
+    sc_tick next_timestamp;
 };
 
 bool

app/src/frame_buffer.c

@@ -0,0 +1,88 @@
+#include "frame_buffer.h"
+
+#include <assert.h>
+#include <libavutil/avutil.h>
+#include <libavformat/avformat.h>
+
+#include "util/log.h"
+
+bool
+sc_frame_buffer_init(struct sc_frame_buffer *fb) {
+    fb->pending_frame = av_frame_alloc();
+    if (!fb->pending_frame) {
+        return false;
+    }
+
+    fb->tmp_frame = av_frame_alloc();
+    if (!fb->tmp_frame) {
+        av_frame_free(&fb->pending_frame);
+        return false;
+    }
+
+    bool ok = sc_mutex_init(&fb->mutex);
+    if (!ok) {
+        av_frame_free(&fb->pending_frame);
+        av_frame_free(&fb->tmp_frame);
+        return false;
+    }
+
+    // there is initially no frame, so consider it has already been consumed
+    fb->pending_frame_consumed = true;
+
+    return true;
+}
+
+void
+sc_frame_buffer_destroy(struct sc_frame_buffer *fb) {
+    sc_mutex_destroy(&fb->mutex);
+    av_frame_free(&fb->pending_frame);
+    av_frame_free(&fb->tmp_frame);
+}
+
+static inline void
+swap_frames(AVFrame **lhs, AVFrame **rhs) {
+    AVFrame *tmp = *lhs;
+    *lhs = *rhs;
+    *rhs = tmp;
+}
+
+bool
+sc_frame_buffer_push(struct sc_frame_buffer *fb, const AVFrame *frame,
+                  bool *previous_frame_skipped) {
+    sc_mutex_lock(&fb->mutex);
+
+    // Use a temporary frame to preserve pending_frame in case of error.
+    // tmp_frame is an empty frame, no need to call av_frame_unref() beforehand.
+    int r = av_frame_ref(fb->tmp_frame, frame);
+    if (r) {
+        LOGE("Could not ref frame: %d", r);
+        return false;
+    }
+
+    // Now that av_frame_ref() succeeded, we can replace the previous
+    // pending_frame
+    swap_frames(&fb->pending_frame, &fb->tmp_frame);
+    av_frame_unref(fb->tmp_frame);
+
+    if (previous_frame_skipped) {
+        *previous_frame_skipped = !fb->pending_frame_consumed;
+    }
+    fb->pending_frame_consumed = false;
+
+    sc_mutex_unlock(&fb->mutex);
+
+    return true;
+}
+
+void
+sc_frame_buffer_consume(struct sc_frame_buffer *fb, AVFrame *dst) {
+    sc_mutex_lock(&fb->mutex);
+    assert(!fb->pending_frame_consumed);
+    fb->pending_frame_consumed = true;
+
+    av_frame_move_ref(dst, fb->pending_frame);
+    // av_frame_move_ref() resets its source frame, so no need to call
+    // av_frame_unref()
+
+    sc_mutex_unlock(&fb->mutex);
+}

app/src/frame_buffer.h

@@ -0,0 +1,44 @@
+#ifndef SC_FRAME_BUFFER_H
+#define SC_FRAME_BUFFER_H
+
+#include "common.h"
+
+#include <stdbool.h>
+
+#include "util/thread.h"
+
+// forward declarations
+typedef struct AVFrame AVFrame;
+
+/**
+ * A frame buffer holds 1 pending frame, which is the last frame received from
+ * the producer (typically, the decoder).
+ *
+ * If a pending frame has not been consumed when the producer pushes a new
+ * frame, then it is lost. The intent is to always provide access to the very
+ * last frame to minimize latency.
+ */
+
+struct sc_frame_buffer {
+    AVFrame *pending_frame;
+    AVFrame *tmp_frame; // To preserve the pending frame on error
+
+    sc_mutex mutex;
+
+    bool pending_frame_consumed;
+};
+
+bool
+sc_frame_buffer_init(struct sc_frame_buffer *fb);
+
+void
+sc_frame_buffer_destroy(struct sc_frame_buffer *fb);
+
+bool
+sc_frame_buffer_push(struct sc_frame_buffer *fb, const AVFrame *frame,
+                     bool *skipped);
+
+void
+sc_frame_buffer_consume(struct sc_frame_buffer *fb, AVFrame *dst);
+
+#endif

app/src/input_manager.c

@@ -4,7 +4,6 @@
 #include <SDL2/SDL_keycode.h>
 
 #include "event_converter.h"
-#include "util/lock.h"
 #include "util/log.h"
 
 static const int ACTION_DOWN = 1;
@@ -53,9 +52,13 @@ is_shortcut_mod(struct input_manager *im, uint16_t sdl_mod) {
 }
 
 void
-input_manager_init(struct input_manager *im,
-                   const struct scrcpy_options *options)
-{
+input_manager_init(struct input_manager *im, struct controller *controller,
+                   struct screen *screen,
+                   const struct scrcpy_options *options) {
+    im->controller = controller;
+    im->screen = screen;
+    im->repeat = 0;
+
     im->control = options->control;
     im->forward_key_repeat = options->forward_key_repeat;
     im->prefer_text = options->prefer_text;
@@ -73,6 +76,10 @@ input_manager_init(struct input_manager *im,
     im->sdl_shortcut_mods.count = shortcut_mods->count;
 
     im->vfinger_down = false;
+
+    im->last_keycode = SDLK_UNKNOWN;
+    im->last_mod = 0;
+    im->key_repeat = 0;
 }
 
 static void
@@ -147,13 +154,25 @@ action_cut(struct controller *controller, int actions) {
 }
 
 // turn the screen on if it was off, press BACK otherwise
+// If the screen is off, it is turned on only on ACTION_DOWN
 static void
-press_back_or_turn_screen_on(struct controller *controller) {
+press_back_or_turn_screen_on(struct controller *controller, int actions) {
     struct control_msg msg;
     msg.type = CONTROL_MSG_TYPE_BACK_OR_SCREEN_ON;
 
-    if (!controller_push_msg(controller, &msg)) {
-        LOGW("Could not request 'press back or turn screen on'");
+    if (actions & ACTION_DOWN) {
+        msg.back_or_screen_on.action = AKEY_EVENT_ACTION_DOWN;
+        if (!controller_push_msg(controller, &msg)) {
+            LOGW("Could not request 'press back or turn screen on'");
+            return;
+        }
+    }
+
+    if (actions & ACTION_UP) {
+        msg.back_or_screen_on.action = AKEY_EVENT_ACTION_UP;
+        if (!controller_push_msg(controller, &msg)) {
+            LOGW("Could not request 'press back or turn screen on'");
+        }
     }
 }
 
@@ -168,9 +187,19 @@ expand_notification_panel(struct controller *controller) {
 }
 
 static void
-collapse_notification_panel(struct controller *controller) {
+expand_settings_panel(struct controller *controller) {
     struct control_msg msg;
-    msg.type = CONTROL_MSG_TYPE_COLLAPSE_NOTIFICATION_PANEL;
+    msg.type = CONTROL_MSG_TYPE_EXPAND_SETTINGS_PANEL;
+
+    if (!controller_push_msg(controller, &msg)) {
+        LOGW("Could not request 'expand settings panel'");
+    }
+}
+
+static void
+collapse_panels(struct controller *controller) {
+    struct control_msg msg;
+    msg.type = CONTROL_MSG_TYPE_COLLAPSE_PANELS;
 
     if (!controller_push_msg(controller, &msg)) {
         LOGW("Could not request 'collapse notification panel'");
@@ -190,13 +219,20 @@ set_device_clipboard(struct controller *controller, bool paste) {
         return;
     }
 
+    char *text_dup = strdup(text);
+    SDL_free(text);
+    if (!text_dup) {
+        LOGW("Could not strdup input text");
+        return;
+    }
+
     struct control_msg msg;
     msg.type = CONTROL_MSG_TYPE_SET_CLIPBOARD;
-    msg.set_clipboard.text = text;
+    msg.set_clipboard.text = text_dup;
     msg.set_clipboard.paste = paste;
 
     if (!controller_push_msg(controller, &msg)) {
-        SDL_free(text);
+        free(text_dup);
         LOGW("Could not request 'set device clipboard'");
     }
 }
@@ -242,11 +278,18 @@ clipboard_paste(struct controller *controller) {
         return;
     }
 
+    char *text_dup = strdup(text);
+    SDL_free(text);
+    if (!text_dup) {
+        LOGW("Could not strdup input text");
+        return;
+    }
+
     struct control_msg msg;
     msg.type = CONTROL_MSG_TYPE_INJECT_TEXT;
-    msg.inject_text.text = text;
+    msg.inject_text.text = text_dup;
     if (!controller_push_msg(controller, &msg)) {
-        SDL_free(text);
+        free(text_dup);
         LOGW("Could not request 'paste clipboard'");
     }
 }
@@ -273,7 +316,7 @@ rotate_client_right(struct screen *screen) {
     screen_set_rotation(screen, new_rotation);
 }
 
-void
+static void
 input_manager_process_text_input(struct input_manager *im,
                                  const SDL_TextInputEvent *event) {
     if (is_shortcut_mod(im, SDL_GetModState())) {
@@ -291,13 +334,13 @@ input_manager_process_text_input(struct input_manager *im,
 
     struct control_msg msg;
     msg.type = CONTROL_MSG_TYPE_INJECT_TEXT;
-    msg.inject_text.text = SDL_strdup(event->text);
+    msg.inject_text.text = strdup(event->text);
     if (!msg.inject_text.text) {
         LOGW("Could not strdup input text");
         return;
     }
     if (!controller_push_msg(im->controller, &msg)) {
-        SDL_free(msg.inject_text.text);
+        free(msg.inject_text.text);
         LOGW("Could not request 'inject text'");
     }
 }
@@ -353,22 +396,33 @@ convert_input_key(const SDL_KeyboardEvent *from, struct control_msg *to,
     return true;
 }
 
-void
+static void
 input_manager_process_key(struct input_manager *im,
                           const SDL_KeyboardEvent *event) {
     // control: indicates the state of the command-line option --no-control
     bool control = im->control;
 
-    bool smod = is_shortcut_mod(im, event->keysym.mod);
-
     struct controller *controller = im->controller;
 
     SDL_Keycode keycode = event->keysym.sym;
+    uint16_t mod = event->keysym.mod;
     bool down = event->type == SDL_KEYDOWN;
     bool ctrl = event->keysym.mod & KMOD_CTRL;
     bool shift = event->keysym.mod & KMOD_SHIFT;
     bool repeat = event->repeat;
 
+    bool smod = is_shortcut_mod(im, mod);
+
+    if (down && !repeat) {
+        if (keycode == im->last_keycode && mod == im->last_mod) {
+            ++im->key_repeat;
+        } else {
+            im->key_repeat = 0;
+            im->last_keycode = keycode;
+            im->last_mod = mod;
+        }
+    }
+
     // The shortcut modifier is pressed
     if (smod) {
         int action = down ? ACTION_DOWN : ACTION_UP;
@@ -467,17 +521,17 @@ input_manager_process_key(struct input_manager *im,
                 return;
             case SDLK_i:
                 if (!shift && !repeat && down) {
-                    struct fps_counter *fps_counter =
-                        im->video_buffer->fps_counter;
-                    switch_fps_counter_state(fps_counter);
+                    switch_fps_counter_state(&im->screen->fps_counter);
                 }
                 return;
             case SDLK_n:
                 if (control && !repeat && down) {
                     if (shift) {
-                        collapse_notification_panel(controller);
-                    } else {
+                        collapse_panels(controller);
+                    } else if (im->key_repeat == 0) {
                         expand_notification_panel(controller);
+                    } else {
+                        expand_settings_panel(controller);
                     }
                 }
                 return;
@@ -538,11 +592,15 @@ convert_mouse_motion(const SDL_MouseMotionEvent *from, struct screen *screen,
     return true;
 }
 
-void
+static void
 input_manager_process_mouse_motion(struct input_manager *im,
                                    const SDL_MouseMotionEvent *event) {
-    if (!event->state) {
-        // do not send motion events when no button is pressed
+    uint32_t mask = SDL_BUTTON_LMASK;
+    if (im->forward_all_clicks) {
+        mask |= SDL_BUTTON_MMASK | SDL_BUTTON_RMASK;
+    }
+    if (!(event->state & mask)) {
+        // do not send motion events when no click is pressed
         return;
     }
     if (event->which == SDL_TOUCH_MOUSEID) {
@@ -592,7 +650,7 @@ convert_touch(const SDL_TouchFingerEvent *from, struct screen *screen,
     return true;
 }
 
-void
+static void
 input_manager_process_touch(struct input_manager *im,
                             const SDL_TouchFingerEvent *event) {
     struct control_msg msg;
@@ -624,7 +682,7 @@ convert_mouse_button(const SDL_MouseButtonEvent *from, struct screen *screen,
     return true;
 }
 
-void
+static void
 input_manager_process_mouse_button(struct input_manager *im,
                                    const SDL_MouseButtonEvent *event) {
     bool control = im->control;
@@ -635,13 +693,27 @@ input_manager_process_mouse_button(struct input_manager *im,
     }
 
     bool down = event->type == SDL_MOUSEBUTTONDOWN;
-    if (!im->forward_all_clicks && down) {
+    if (!im->forward_all_clicks) {
+        int action = down ? ACTION_DOWN : ACTION_UP;
+
+        if (control && event->button == SDL_BUTTON_X1) {
+            action_app_switch(im->controller, action);
+            return;
+        }
+        if (control && event->button == SDL_BUTTON_X2 && down) {
+            if (event->clicks < 2) {
+                expand_notification_panel(im->controller);
+            } else {
+                expand_settings_panel(im->controller);
+            }
+            return;
+        }
         if (control && event->button == SDL_BUTTON_RIGHT) {
-            press_back_or_turn_screen_on(im->controller);
+            press_back_or_turn_screen_on(im->controller, action);
             return;
         }
         if (control && event->button == SDL_BUTTON_MIDDLE) {
-            action_home(im->controller, ACTION_DOWN | ACTION_UP);
+            action_home(im->controller, action);
             return;
         }
 
@@ -654,7 +726,9 @@ input_manager_process_mouse_button(struct input_manager *im,
             bool outside = x < r->x || x >= r->x + r->w
                         || y < r->y || y >= r->y + r->h;
             if (outside) {
-                screen_resize_to_fit(im->screen);
+                if (down) {
+                    screen_resize_to_fit(im->screen);
+                }
                 return;
             }
         }
@@ -723,7 +797,7 @@ convert_mouse_wheel(const SDL_MouseWheelEvent *from, struct screen *screen,
     return true;
 }
 
-void
+static void
 input_manager_process_mouse_wheel(struct input_manager *im,
                                   const SDL_MouseWheelEvent *event) {
     struct control_msg msg;
@@ -733,3 +807,46 @@ input_manager_process_mouse_wheel(struct input_manager *im,
         }
     }
 }
+
+bool
+input_manager_handle_event(struct input_manager *im, SDL_Event *event) {
+    switch (event->type) {
+        case SDL_TEXTINPUT:
+            if (!im->control) {
+                return true;
+            }
+            input_manager_process_text_input(im, &event->text);
+            return true;
+        case SDL_KEYDOWN:
+        case SDL_KEYUP:
+            // some key events do not interact with the device, so process the
+            // event even if control is disabled
+            input_manager_process_key(im, &event->key);
+            return true;
+        case SDL_MOUSEMOTION:
+            if (!im->control) {
+                break;
+            }
+            input_manager_process_mouse_motion(im, &event->motion);
+            return true;
+        case SDL_MOUSEWHEEL:
+            if (!im->control) {
+                break;
+            }
+            input_manager_process_mouse_wheel(im, &event->wheel);
+            return true;
+        case SDL_MOUSEBUTTONDOWN:
+        case SDL_MOUSEBUTTONUP:
+            // some mouse events do not interact with the device, so process
+            // the event even if control is disabled
+            input_manager_process_mouse_button(im, &event->button);
+            return true;
+        case SDL_FINGERMOTION:
+        case SDL_FINGERDOWN:
+        case SDL_FINGERUP:
+            input_manager_process_touch(im, &event->tfinger);
+            return true;
+    }
+
+    return false;
+}

app/src/input_manager.h

@@ -11,11 +11,9 @@
 #include "fps_counter.h"
 #include "scrcpy.h"
 #include "screen.h"
-#include "video_buffer.h"
 
 struct input_manager {
     struct controller *controller;
-    struct video_buffer *video_buffer;
     struct screen *screen;
 
     // SDL reports repeated events as a boolean, but Android expects the actual
@@ -34,34 +32,20 @@ struct input_manager {
     } sdl_shortcut_mods;
 
     bool vfinger_down;
+
+    // Tracks the number of identical consecutive shortcut key down events.
+    // Not to be confused with event->repeat, which counts the number of
+    // system-generated repeated key presses.
+    unsigned key_repeat;
+    SDL_Keycode last_keycode;
+    uint16_t last_mod;
 };
 
 void
-input_manager_init(struct input_manager *im,
-                   const struct scrcpy_options *options);
+input_manager_init(struct input_manager *im, struct controller *controller,
+                   struct screen *screen, const struct scrcpy_options *options);
 
-void
-input_manager_process_text_input(struct input_manager *im,
-                                 const SDL_TextInputEvent *event);
-
-void
-input_manager_process_key(struct input_manager *im,
-                          const SDL_KeyboardEvent *event);
-
-void
-input_manager_process_mouse_motion(struct input_manager *im,
-                                   const SDL_MouseMotionEvent *event);
-
-void
-input_manager_process_touch(struct input_manager *im,
-                            const SDL_TouchFingerEvent *event);
-
-void
-input_manager_process_mouse_button(struct input_manager *im,
-                                   const SDL_MouseButtonEvent *event);
-
-void
-input_manager_process_mouse_wheel(struct input_manager *im,
-                                  const SDL_MouseWheelEvent *event);
+bool
+input_manager_handle_event(struct input_manager *im, SDL_Event *event);
 
 #endif

app/src/main.c

@@ -6,6 +6,9 @@
 #include <stdbool.h>
 #include <unistd.h>
 #include <libavformat/avformat.h>
+#ifdef HAVE_V4L2
+# include <libavdevice/avdevice.h>
+#endif
 #define SDL_MAIN_HANDLED // avoid link error on Linux Windows Subsystem
 #include <SDL2/SDL.h>
 
@@ -28,26 +31,13 @@ print_version(void) {
     fprintf(stderr, " - libavutil %d.%d.%d\n", LIBAVUTIL_VERSION_MAJOR,
                                                LIBAVUTIL_VERSION_MINOR,
                                                LIBAVUTIL_VERSION_MICRO);
+#ifdef HAVE_V4L2
+    fprintf(stderr, " - libavdevice %d.%d.%d\n", LIBAVDEVICE_VERSION_MAJOR,
+                                                 LIBAVDEVICE_VERSION_MINOR,
+                                                 LIBAVDEVICE_VERSION_MICRO);
+#endif
 }
 
-static SDL_LogPriority
-convert_log_level_to_sdl(enum sc_log_level level) {
-    switch (level) {
-        case SC_LOG_LEVEL_DEBUG:
-            return SDL_LOG_PRIORITY_DEBUG;
-        case SC_LOG_LEVEL_INFO:
-            return SDL_LOG_PRIORITY_INFO;
-        case SC_LOG_LEVEL_WARN:
-            return SDL_LOG_PRIORITY_WARN;
-        case SC_LOG_LEVEL_ERROR:
-            return SDL_LOG_PRIORITY_ERROR;
-        default:
-            assert(!"unexpected log level");
-            return SDL_LOG_PRIORITY_INFO;
-    }
-}
-
-
 int
 main(int argc, char *argv[]) {
 #ifdef __WINDOWS__
@@ -71,8 +61,7 @@ main(int argc, char *argv[]) {
         return 1;
     }
 
-    SDL_LogPriority sdl_log = convert_log_level_to_sdl(args.opts.log_level);
-    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, sdl_log);
+    sc_set_log_level(args.opts.log_level);
 
     if (args.help) {
         scrcpy_print_usage(argv[0]);
@@ -90,6 +79,12 @@ main(int argc, char *argv[]) {
     av_register_all();
 #endif
 
+#ifdef HAVE_V4L2
+    if (args.opts.v4l2_device) {
+        avdevice_register_all();
+    }
+#endif
+
     if (avformat_network_init()) {
         return 1;
     }

app/src/receiver.c

@@ -4,12 +4,12 @@
 #include <SDL2/SDL_clipboard.h>
 
 #include "device_msg.h"
-#include "util/lock.h"
 #include "util/log.h"
 
 bool
 receiver_init(struct receiver *receiver, socket_t control_socket) {
-    if (!(receiver->mutex = SDL_CreateMutex())) {
+    bool ok = sc_mutex_init(&receiver->mutex);
+    if (!ok) {
         return false;
     }
     receiver->control_socket = control_socket;
@@ -18,7 +18,7 @@ receiver_init(struct receiver *receiver, socket_t control_socket) {
 
 void
 receiver_destroy(struct receiver *receiver) {
-    SDL_DestroyMutex(receiver->mutex);
+    sc_mutex_destroy(&receiver->mutex);
 }
 
 static void
@@ -101,8 +101,9 @@ bool
 receiver_start(struct receiver *receiver) {
     LOGD("Starting receiver thread");
 
-    receiver->thread = SDL_CreateThread(run_receiver, "receiver", receiver);
-    if (!receiver->thread) {
+    bool ok = sc_thread_create(&receiver->thread, run_receiver, "receiver",
+                               receiver);
+    if (!ok) {
         LOGC("Could not start receiver thread");
         return false;
     }
@@ -112,5 +113,5 @@ receiver_start(struct receiver *receiver) {
 
 void
 receiver_join(struct receiver *receiver) {
-    SDL_WaitThread(receiver->thread, NULL);
+    sc_thread_join(&receiver->thread, NULL);
 }

app/src/receiver.h

@@ -4,17 +4,16 @@
 #include "common.h"
 
 #include <stdbool.h>
-#include <SDL2/SDL_mutex.h>
-#include <SDL2/SDL_thread.h>
 
 #include "util/net.h"
+#include "util/thread.h"
 
 // receive events from the device
 // managed by the controller
 struct receiver {
     socket_t control_socket;
-    SDL_Thread *thread;
-    SDL_mutex *mutex;
+    sc_thread thread;
+    sc_mutex mutex;
 };
 
 bool

app/src/recorder.c

@@ -3,8 +3,11 @@
 #include <assert.h>
 #include <libavutil/time.h>
 
-#include "util/lock.h"
 #include "util/log.h"
+#include "util/str_util.h"
+
+/** Downcast packet_sink to recorder */
+#define DOWNCAST(SINK) container_of(SINK, struct recorder, packet_sink)
 
 static const AVRational SCRCPY_TIME_BASE = {1, 1000000}; // timestamps in us
 
@@ -20,24 +23,27 @@ find_muxer(const char *name) {
 #else
         oformat = av_oformat_next(oformat);
 #endif
-        // until null or with name "mp4"
-    } while (oformat && strcmp(oformat->name, name));
+        // until null or containing the requested name
+    } while (oformat && !strlist_contains(oformat->name, ',', name));
     return oformat;
 }
 
 static struct record_packet *
 record_packet_new(const AVPacket *packet) {
-    struct record_packet *rec = SDL_malloc(sizeof(*rec));
+    struct record_packet *rec = malloc(sizeof(*rec));
     if (!rec) {
         return NULL;
     }
 
-    // av_packet_ref() does not initialize all fields in old FFmpeg versions
-    // See <https://github.com/Genymobile/scrcpy/issues/707>
-    av_init_packet(&rec->packet);
+    rec->packet = av_packet_alloc();
+    if (!rec->packet) {
+        free(rec);
+        return NULL;
+    }
 
-    if (av_packet_ref(&rec->packet, packet)) {
-        SDL_free(rec);
+    if (av_packet_ref(rec->packet, packet)) {
+        av_packet_free(&rec->packet);
+        free(rec);
         return NULL;
     }
     return rec;
@@ -45,63 +51,19 @@ record_packet_new(const AVPacket *packet) {
 
 static void
 record_packet_delete(struct record_packet *rec) {
-    av_packet_unref(&rec->packet);
-    SDL_free(rec);
+    av_packet_free(&rec->packet);
+    free(rec);
 }
 
 static void
 recorder_queue_clear(struct recorder_queue *queue) {
-    while (!queue_is_empty(queue)) {
+    while (!sc_queue_is_empty(queue)) {
         struct record_packet *rec;
-        queue_take(queue, next, &rec);
+        sc_queue_take(queue, next, &rec);
         record_packet_delete(rec);
     }
 }
 
-bool
-recorder_init(struct recorder *recorder,
-              const char *filename,
-              enum sc_record_format format,
-              struct size declared_frame_size) {
-    recorder->filename = SDL_strdup(filename);
-    if (!recorder->filename) {
-        LOGE("Could not strdup filename");
-        return false;
-    }
-
-    recorder->mutex = SDL_CreateMutex();
-    if (!recorder->mutex) {
-        LOGC("Could not create mutex");
-        SDL_free(recorder->filename);
-        return false;
-    }
-
-    recorder->queue_cond = SDL_CreateCond();
-    if (!recorder->queue_cond) {
-        LOGC("Could not create cond");
-        SDL_DestroyMutex(recorder->mutex);
-        SDL_free(recorder->filename);
-        return false;
-    }
-
-    queue_init(&recorder->queue);
-    recorder->stopped = false;
-    recorder->failed = false;
-    recorder->format = format;
-    recorder->declared_frame_size = declared_frame_size;
-    recorder->header_written = false;
-    recorder->previous = NULL;
-
-    return true;
-}
-
-void
-recorder_destroy(struct recorder *recorder) {
-    SDL_DestroyCond(recorder->queue_cond);
-    SDL_DestroyMutex(recorder->mutex);
-    SDL_free(recorder->filename);
-}
-
 static const char *
 recorder_get_format_name(enum sc_record_format format) {
     switch (format) {
@@ -111,88 +73,6 @@ recorder_get_format_name(enum sc_record_format format) {
     }
 }
 
-bool
-recorder_open(struct recorder *recorder, const AVCodec *input_codec) {
-    const char *format_name = recorder_get_format_name(recorder->format);
-    assert(format_name);
-    const AVOutputFormat *format = find_muxer(format_name);
-    if (!format) {
-        LOGE("Could not find muxer");
-        return false;
-    }
-
-    recorder->ctx = avformat_alloc_context();
-    if (!recorder->ctx) {
-        LOGE("Could not allocate output context");
-        return false;
-    }
-
-    // contrary to the deprecated API (av_oformat_next()), av_muxer_iterate()
-    // returns (on purpose) a pointer-to-const, but AVFormatContext.oformat
-    // still expects a pointer-to-non-const (it has not be updated accordingly)
-    // <https://github.com/FFmpeg/FFmpeg/commit/0694d8702421e7aff1340038559c438b61bb30dd>
-    recorder->ctx->oformat = (AVOutputFormat *) format;
-
-    av_dict_set(&recorder->ctx->metadata, "comment",
-                "Recorded by scrcpy " SCRCPY_VERSION, 0);
-
-    AVStream *ostream = avformat_new_stream(recorder->ctx, input_codec);
-    if (!ostream) {
-        avformat_free_context(recorder->ctx);
-        return false;
-    }
-
-#ifdef SCRCPY_LAVF_HAS_NEW_CODEC_PARAMS_API
-    ostream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
-    ostream->codecpar->codec_id = input_codec->id;
-    ostream->codecpar->format = AV_PIX_FMT_YUV420P;
-    ostream->codecpar->width = recorder->declared_frame_size.width;
-    ostream->codecpar->height = recorder->declared_frame_size.height;
-#else
-    ostream->codec->codec_type = AVMEDIA_TYPE_VIDEO;
-    ostream->codec->codec_id = input_codec->id;
-    ostream->codec->pix_fmt = AV_PIX_FMT_YUV420P;
-    ostream->codec->width = recorder->declared_frame_size.width;
-    ostream->codec->height = recorder->declared_frame_size.height;
-#endif
-
-    int ret = avio_open(&recorder->ctx->pb, recorder->filename,
-                        AVIO_FLAG_WRITE);
-    if (ret < 0) {
-        LOGE("Failed to open output file: %s", recorder->filename);
-        // ostream will be cleaned up during context cleaning
-        avformat_free_context(recorder->ctx);
-        return false;
-    }
-
-    LOGI("Recording started to %s file: %s", format_name, recorder->filename);
-
-    return true;
-}
-
-void
-recorder_close(struct recorder *recorder) {
-    if (recorder->header_written) {
-        int ret = av_write_trailer(recorder->ctx);
-        if (ret < 0) {
-            LOGE("Failed to write trailer to %s", recorder->filename);
-            recorder->failed = true;
-        }
-    } else {
-        // the recorded file is empty
-        recorder->failed = true;
-    }
-    avio_close(recorder->ctx->pb);
-    avformat_free_context(recorder->ctx);
-
-    if (recorder->failed) {
-        LOGE("Recording failed to %s", recorder->filename);
-    } else {
-        const char *format_name = recorder_get_format_name(recorder->format);
-        LOGI("Recording complete to %s file: %s", format_name, recorder->filename);
-    }
-}
-
 static bool
 recorder_write_header(struct recorder *recorder, const AVPacket *packet) {
     AVStream *ostream = recorder->ctx->streams[0];
@@ -206,13 +86,8 @@ recorder_write_header(struct recorder *recorder, const AVPacket *packet) {
     // copy the first packet to the extra data
     memcpy(extradata, packet->data, packet->size);
 
-#ifdef SCRCPY_LAVF_HAS_NEW_CODEC_PARAMS_API
     ostream->codecpar->extradata = extradata;
     ostream->codecpar->extradata_size = packet->size;
-#else
-    ostream->codec->extradata = extradata;
-    ostream->codec->extradata_size = packet->size;
-#endif
 
     int ret = avformat_write_header(recorder->ctx, NULL);
     if (ret < 0) {
@@ -229,7 +104,7 @@ recorder_rescale_packet(struct recorder *recorder, AVPacket *packet) {
     av_packet_rescale_ts(packet, SCRCPY_TIME_BASE, ostream->time_base);
 }
 
-bool
+static bool
 recorder_write(struct recorder *recorder, AVPacket *packet) {
     if (!recorder->header_written) {
         if (packet->pts != AV_NOPTS_VALUE) {
@@ -258,22 +133,22 @@ run_recorder(void *data) {
     struct recorder *recorder = data;
 
     for (;;) {
-        mutex_lock(recorder->mutex);
+        sc_mutex_lock(&recorder->mutex);
 
-        while (!recorder->stopped && queue_is_empty(&recorder->queue)) {
-            cond_wait(recorder->queue_cond, recorder->mutex);
+        while (!recorder->stopped && sc_queue_is_empty(&recorder->queue)) {
+            sc_cond_wait(&recorder->queue_cond, &recorder->mutex);
         }
 
         // if stopped is set, continue to process the remaining events (to
         // finish the recording) before actually stopping
 
-        if (recorder->stopped && queue_is_empty(&recorder->queue)) {
-            mutex_unlock(recorder->mutex);
+        if (recorder->stopped && sc_queue_is_empty(&recorder->queue)) {
+            sc_mutex_unlock(&recorder->mutex);
             struct record_packet *last = recorder->previous;
             if (last) {
                 // assign an arbitrary duration to the last packet
-                last->packet.duration = 100000;
-                bool ok = recorder_write(recorder, &last->packet);
+                last->packet->duration = 100000;
+                bool ok = recorder_write(recorder, last->packet);
                 if (!ok) {
                     // failing to write the last frame is not very serious, no
                     // future frame may depend on it, so the resulting file
@@ -286,9 +161,9 @@ run_recorder(void *data) {
         }
 
         struct record_packet *rec;
-        queue_take(&recorder->queue, next, &rec);
+        sc_queue_take(&recorder->queue, next, &rec);
 
-        mutex_unlock(recorder->mutex);
+        sc_mutex_unlock(&recorder->mutex);
 
         // recorder->previous is only written from this thread, no need to lock
         struct record_packet *previous = recorder->previous;
@@ -300,25 +175,45 @@ run_recorder(void *data) {
         }
 
         // config packets have no PTS, we must ignore them
-        if (rec->packet.pts != AV_NOPTS_VALUE
-            && previous->packet.pts != AV_NOPTS_VALUE) {
+        if (rec->packet->pts != AV_NOPTS_VALUE
+            && previous->packet->pts != AV_NOPTS_VALUE) {
             // we now know the duration of the previous packet
-            previous->packet.duration = rec->packet.pts - previous->packet.pts;
+            previous->packet->duration =
+                rec->packet->pts - previous->packet->pts;
         }
 
-        bool ok = recorder_write(recorder, &previous->packet);
+        bool ok = recorder_write(recorder, previous->packet);
         record_packet_delete(previous);
         if (!ok) {
             LOGE("Could not record packet");
 
-            mutex_lock(recorder->mutex);
+            sc_mutex_lock(&recorder->mutex);
             recorder->failed = true;
             // discard pending packets
             recorder_queue_clear(&recorder->queue);
-            mutex_unlock(recorder->mutex);
+            sc_mutex_unlock(&recorder->mutex);
             break;
         }
+    }
 
+    if (!recorder->failed) {
+        if (recorder->header_written) {
+            int ret = av_write_trailer(recorder->ctx);
+            if (ret < 0) {
+                LOGE("Failed to write trailer to %s", recorder->filename);
+                recorder->failed = true;
+            }
+        } else {
+            // the recorded file is empty
+            recorder->failed = true;
+        }
+    }
+
+    if (recorder->failed) {
+        LOGE("Recording failed to %s", recorder->filename);
+    } else {
+        const char *format_name = recorder_get_format_name(recorder->format);
+        LOGI("Recording complete to %s file: %s", format_name, recorder->filename);
     }
 
     LOGD("Recorder thread ended");
@@ -326,53 +221,176 @@ run_recorder(void *data) {
     return 0;
 }
 
-bool
-recorder_start(struct recorder *recorder) {
-    LOGD("Starting recorder thread");
-
-    recorder->thread = SDL_CreateThread(run_recorder, "recorder", recorder);
-    if (!recorder->thread) {
-        LOGC("Could not start recorder thread");
+static bool
+recorder_open(struct recorder *recorder, const AVCodec *input_codec) {
+    bool ok = sc_mutex_init(&recorder->mutex);
+    if (!ok) {
+        LOGC("Could not create mutex");
         return false;
     }
 
+    ok = sc_cond_init(&recorder->queue_cond);
+    if (!ok) {
+        LOGC("Could not create cond");
+        goto error_mutex_destroy;
+    }
+
+    sc_queue_init(&recorder->queue);
+    recorder->stopped = false;
+    recorder->failed = false;
+    recorder->header_written = false;
+    recorder->previous = NULL;
+
+    const char *format_name = recorder_get_format_name(recorder->format);
+    assert(format_name);
+    const AVOutputFormat *format = find_muxer(format_name);
+    if (!format) {
+        LOGE("Could not find muxer");
+        goto error_cond_destroy;
+    }
+
+    recorder->ctx = avformat_alloc_context();
+    if (!recorder->ctx) {
+        LOGE("Could not allocate output context");
+        goto error_cond_destroy;
+    }
+
+    // contrary to the deprecated API (av_oformat_next()), av_muxer_iterate()
+    // returns (on purpose) a pointer-to-const, but AVFormatContext.oformat
+    // still expects a pointer-to-non-const (it has not be updated accordingly)
+    // <https://github.com/FFmpeg/FFmpeg/commit/0694d8702421e7aff1340038559c438b61bb30dd>
+    recorder->ctx->oformat = (AVOutputFormat *) format;
+
+    av_dict_set(&recorder->ctx->metadata, "comment",
+                "Recorded by scrcpy " SCRCPY_VERSION, 0);
+
+    AVStream *ostream = avformat_new_stream(recorder->ctx, input_codec);
+    if (!ostream) {
+        goto error_avformat_free_context;
+    }
+
+    ostream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
+    ostream->codecpar->codec_id = input_codec->id;
+    ostream->codecpar->format = AV_PIX_FMT_YUV420P;
+    ostream->codecpar->width = recorder->declared_frame_size.width;
+    ostream->codecpar->height = recorder->declared_frame_size.height;
+
+    int ret = avio_open(&recorder->ctx->pb, recorder->filename,
+                        AVIO_FLAG_WRITE);
+    if (ret < 0) {
+        LOGE("Failed to open output file: %s", recorder->filename);
+        // ostream will be cleaned up during context cleaning
+        goto error_avformat_free_context;
+    }
+
+    LOGD("Starting recorder thread");
+    ok = sc_thread_create(&recorder->thread, run_recorder, "recorder",
+                               recorder);
+    if (!ok) {
+        LOGC("Could not start recorder thread");
+        goto error_avio_close;
+    }
+
+    LOGI("Recording started to %s file: %s", format_name, recorder->filename);
+
     return true;
+
+error_avio_close:
+    avio_close(recorder->ctx->pb);
+error_avformat_free_context:
+    avformat_free_context(recorder->ctx);
+error_cond_destroy:
+    sc_cond_destroy(&recorder->queue_cond);
+error_mutex_destroy:
+    sc_mutex_destroy(&recorder->mutex);
+
+    return false;
 }
 
-void
-recorder_stop(struct recorder *recorder) {
-    mutex_lock(recorder->mutex);
+static void
+recorder_close(struct recorder *recorder) {
+    sc_mutex_lock(&recorder->mutex);
     recorder->stopped = true;
-    cond_signal(recorder->queue_cond);
-    mutex_unlock(recorder->mutex);
+    sc_cond_signal(&recorder->queue_cond);
+    sc_mutex_unlock(&recorder->mutex);
+
+    sc_thread_join(&recorder->thread, NULL);
+
+    avio_close(recorder->ctx->pb);
+    avformat_free_context(recorder->ctx);
+    sc_cond_destroy(&recorder->queue_cond);
+    sc_mutex_destroy(&recorder->mutex);
 }
 
-void
-recorder_join(struct recorder *recorder) {
-    SDL_WaitThread(recorder->thread, NULL);
-}
-
-bool
+static bool
 recorder_push(struct recorder *recorder, const AVPacket *packet) {
-    mutex_lock(recorder->mutex);
+    sc_mutex_lock(&recorder->mutex);
     assert(!recorder->stopped);
 
     if (recorder->failed) {
         // reject any new packet (this will stop the stream)
-        mutex_unlock(recorder->mutex);
+        sc_mutex_unlock(&recorder->mutex);
         return false;
     }
 
     struct record_packet *rec = record_packet_new(packet);
     if (!rec) {
         LOGC("Could not allocate record packet");
-        mutex_unlock(recorder->mutex);
+        sc_mutex_unlock(&recorder->mutex);
         return false;
     }
 
-    queue_push(&recorder->queue, next, rec);
-    cond_signal(recorder->queue_cond);
+    sc_queue_push(&recorder->queue, next, rec);
+    sc_cond_signal(&recorder->queue_cond);
 
-    mutex_unlock(recorder->mutex);
+    sc_mutex_unlock(&recorder->mutex);
     return true;
 }
+
+static bool
+recorder_packet_sink_open(struct sc_packet_sink *sink, const AVCodec *codec) {
+    struct recorder *recorder = DOWNCAST(sink);
+    return recorder_open(recorder, codec);
+}
+
+static void
+recorder_packet_sink_close(struct sc_packet_sink *sink) {
+    struct recorder *recorder = DOWNCAST(sink);
+    recorder_close(recorder);
+}
+
+static bool
+recorder_packet_sink_push(struct sc_packet_sink *sink, const AVPacket *packet) {
+    struct recorder *recorder = DOWNCAST(sink);
+    return recorder_push(recorder, packet);
+}
+
+bool
+recorder_init(struct recorder *recorder,
+              const char *filename,
+              enum sc_record_format format,
+              struct size declared_frame_size) {
+    recorder->filename = strdup(filename);
+    if (!recorder->filename) {
+        LOGE("Could not strdup filename");
+        return false;
+    }
+
+    recorder->format = format;
+    recorder->declared_frame_size = declared_frame_size;
+
+    static const struct sc_packet_sink_ops ops = {
+        .open = recorder_packet_sink_open,
+        .close = recorder_packet_sink_close,
+        .push = recorder_packet_sink_push,
+    };
+
+    recorder->packet_sink.ops = &ops;
+
+    return true;
+}
+
+void
+recorder_destroy(struct recorder *recorder) {
+    free(recorder->filename);
+}

app/src/recorder.h

@@ -5,31 +5,33 @@
 
 #include <stdbool.h>
 #include <libavformat/avformat.h>
-#include <SDL2/SDL_mutex.h>
-#include <SDL2/SDL_thread.h>
 
 #include "coords.h"
 #include "scrcpy.h"
+#include "trait/packet_sink.h"
 #include "util/queue.h"
+#include "util/thread.h"
 
 struct record_packet {
-    AVPacket packet;
+    AVPacket *packet;
     struct record_packet *next;
 };
 
-struct recorder_queue QUEUE(struct record_packet);
+struct recorder_queue SC_QUEUE(struct record_packet);
 
 struct recorder {
+    struct sc_packet_sink packet_sink; // packet sink trait
+
     char *filename;
     enum sc_record_format format;
     AVFormatContext *ctx;
     struct size declared_frame_size;
     bool header_written;
 
-    SDL_Thread *thread;
-    SDL_mutex *mutex;
-    SDL_cond *queue_cond;
-    bool stopped; // set on recorder_stop() by the stream reader
+    sc_thread thread;
+    sc_mutex mutex;
+    sc_cond queue_cond;
+    bool stopped; // set on recorder_close()
     bool failed; // set on packet write failure
     struct recorder_queue queue;
 
@@ -47,22 +49,4 @@ recorder_init(struct recorder *recorder, const char *filename,
 void
 recorder_destroy(struct recorder *recorder);
 
-bool
-recorder_open(struct recorder *recorder, const AVCodec *input_codec);
-
-void
-recorder_close(struct recorder *recorder);
-
-bool
-recorder_start(struct recorder *recorder);
-
-void
-recorder_stop(struct recorder *recorder);
-
-void
-recorder_join(struct recorder *recorder);
-
-bool
-recorder_push(struct recorder *recorder, const AVPacket *packet);
-
 #endif

app/src/scrcpy.c

@@ -15,43 +15,32 @@
 
 #include "controller.h"
 #include "decoder.h"
-#include "device.h"
 #include "events.h"
 #include "file_handler.h"
-#include "fps_counter.h"
 #include "input_manager.h"
 #include "recorder.h"
 #include "screen.h"
 #include "server.h"
 #include "stream.h"
 #include "tiny_xpm.h"
-#include "video_buffer.h"
-#include "util/lock.h"
 #include "util/log.h"
 #include "util/net.h"
+#ifdef HAVE_V4L2
+# include "v4l2_sink.h"
+#endif
 
-static struct server server;
-static struct screen screen = SCREEN_INITIALIZER;
-static struct fps_counter fps_counter;
-static struct video_buffer video_buffer;
-static struct stream stream;
-static struct decoder decoder;
-static struct recorder recorder;
-static struct controller controller;
-static struct file_handler file_handler;
-
-static struct input_manager input_manager = {
-    .controller = &controller,
-    .video_buffer = &video_buffer,
-    .screen = &screen,
-    .repeat = 0,
-
-    // initialized later
-    .prefer_text = false,
-    .sdl_shortcut_mods = {
-        .data = {0},
-        .count = 0,
-    },
+struct scrcpy {
+    struct server server;
+    struct screen screen;
+    struct stream stream;
+    struct decoder decoder;
+    struct recorder recorder;
+#ifdef HAVE_V4L2
+    struct sc_v4l2_sink v4l2_sink;
+#endif
+    struct controller controller;
+    struct file_handler file_handler;
+    struct input_manager input_manager;
 };
 
 #ifdef _WIN32
@@ -129,30 +118,6 @@ sdl_init_and_configure(bool display, const char *render_driver,
     return true;
 }
 
-
-#if defined(__APPLE__) || defined(__WINDOWS__)
-# define CONTINUOUS_RESIZING_WORKAROUND
-#endif
-
-#ifdef CONTINUOUS_RESIZING_WORKAROUND
-// On Windows and MacOS, resizing blocks the event loop, so resizing events are
-// not triggered. As a workaround, handle them in an event handler.
-//
-// <https://bugzilla.libsdl.org/show_bug.cgi?id=2077>
-// <https://stackoverflow.com/a/40693139/1987178>
-static int
-event_watcher(void *data, SDL_Event *event) {
-    (void) data;
-    if (event->type == SDL_WINDOWEVENT
-            && event->window.event == SDL_WINDOWEVENT_RESIZED) {
-        // In practice, it seems to always be called from the same thread in
-        // that specific case. Anyway, it's just a workaround.
-        screen_render(&screen, true);
-    }
-    return 0;
-}
-#endif
-
 static bool
 is_apk(const char *file) {
     const char *ext = strrchr(file, '.');
@@ -166,7 +131,8 @@ enum event_result {
 };
 
 static enum event_result
-handle_event(SDL_Event *event, const struct scrcpy_options *options) {
+handle_event(struct scrcpy *s, const struct scrcpy_options *options,
+             SDL_Event *event) {
     switch (event->type) {
         case EVENT_STREAM_STOPPED:
             LOGD("Video stream stopped");
@@ -174,81 +140,45 @@ handle_event(SDL_Event *event, const struct scrcpy_options *options) {
         case SDL_QUIT:
             LOGD("User requested to quit");
             return EVENT_RESULT_STOPPED_BY_USER;
-        case EVENT_NEW_FRAME:
-            if (!screen.has_frame) {
-                screen.has_frame = true;
-                // this is the very first frame, show the window
-                screen_show_window(&screen);
-            }
-            if (!screen_update_frame(&screen, &video_buffer)) {
-                return EVENT_RESULT_CONTINUE;
-            }
-            break;
-        case SDL_WINDOWEVENT:
-            screen_handle_window_event(&screen, &event->window);
-            break;
-        case SDL_TEXTINPUT:
-            if (!options->control) {
-                break;
-            }
-            input_manager_process_text_input(&input_manager, &event->text);
-            break;
-        case SDL_KEYDOWN:
-        case SDL_KEYUP:
-            // some key events do not interact with the device, so process the
-            // event even if control is disabled
-            input_manager_process_key(&input_manager, &event->key);
-            break;
-        case SDL_MOUSEMOTION:
-            if (!options->control) {
-                break;
-            }
-            input_manager_process_mouse_motion(&input_manager, &event->motion);
-            break;
-        case SDL_MOUSEWHEEL:
-            if (!options->control) {
-                break;
-            }
-            input_manager_process_mouse_wheel(&input_manager, &event->wheel);
-            break;
-        case SDL_MOUSEBUTTONDOWN:
-        case SDL_MOUSEBUTTONUP:
-            // some mouse events do not interact with the device, so process
-            // the event even if control is disabled
-            input_manager_process_mouse_button(&input_manager, &event->button);
-            break;
-        case SDL_FINGERMOTION:
-        case SDL_FINGERDOWN:
-        case SDL_FINGERUP:
-            input_manager_process_touch(&input_manager, &event->tfinger);
-            break;
         case SDL_DROPFILE: {
             if (!options->control) {
                 break;
             }
+            char *file = strdup(event->drop.file);
+            SDL_free(event->drop.file);
+            if (!file) {
+                LOGW("Could not strdup drop filename\n");
+                break;
+            }
+
             file_handler_action_t action;
-            if (is_apk(event->drop.file)) {
+            if (is_apk(file)) {
                 action = ACTION_INSTALL_APK;
             } else {
                 action = ACTION_PUSH_FILE;
             }
-            file_handler_request(&file_handler, action, event->drop.file);
-            break;
+            file_handler_request(&s->file_handler, action, file);
+            goto end;
         }
     }
+
+    bool consumed = screen_handle_event(&s->screen, event);
+    if (consumed) {
+        goto end;
+    }
+
+    consumed = input_manager_handle_event(&s->input_manager, event);
+    (void) consumed;
+
+end:
     return EVENT_RESULT_CONTINUE;
 }
 
 static bool
-event_loop(const struct scrcpy_options *options) {
-#ifdef CONTINUOUS_RESIZING_WORKAROUND
-    if (options->display) {
-        SDL_AddEventWatch(event_watcher, NULL);
-    }
-#endif
+event_loop(struct scrcpy *s, const struct scrcpy_options *options) {
     SDL_Event event;
     while (SDL_WaitEvent(&event)) {
-        enum event_result result = handle_event(&event, options);
+        enum event_result result = handle_event(s, options, &event);
         switch (result) {
             case EVENT_RESULT_STOPPED_BY_USER:
                 return true;
@@ -286,37 +216,54 @@ av_log_callback(void *avcl, int level, const char *fmt, va_list vl) {
     if (priority == 0) {
         return;
     }
-    char *local_fmt = SDL_malloc(strlen(fmt) + 10);
+
+    size_t fmt_len = strlen(fmt);
+    char *local_fmt = malloc(fmt_len + 10);
     if (!local_fmt) {
         LOGC("Could not allocate string");
         return;
     }
-    // strcpy is safe here, the destination is large enough
-    strcpy(local_fmt, "[FFmpeg] ");
-    strcpy(local_fmt + 9, fmt);
+    memcpy(local_fmt, "[FFmpeg] ", 9); // do not write the final '\0'
+    memcpy(local_fmt + 9, fmt, fmt_len + 1); // include '\0'
     SDL_LogMessageV(SDL_LOG_CATEGORY_VIDEO, priority, local_fmt, vl);
-    SDL_free(local_fmt);
+    free(local_fmt);
+}
+
+static void
+stream_on_eos(struct stream *stream, void *userdata) {
+    (void) stream;
+    (void) userdata;
+
+    SDL_Event stop_event;
+    stop_event.type = EVENT_STREAM_STOPPED;
+    SDL_PushEvent(&stop_event);
 }
 
 bool
 scrcpy(const struct scrcpy_options *options) {
-    if (!server_init(&server)) {
+    static struct scrcpy scrcpy;
+    struct scrcpy *s = &scrcpy;
+
+    if (!server_init(&s->server)) {
         return false;
     }
 
     bool ret = false;
 
     bool server_started = false;
-    bool fps_counter_initialized = false;
-    bool video_buffer_initialized = false;
     bool file_handler_initialized = false;
     bool recorder_initialized = false;
+#ifdef HAVE_V4L2
+    bool v4l2_sink_initialized = false;
+#endif
     bool stream_started = false;
     bool controller_initialized = false;
     bool controller_started = false;
+    bool screen_initialized = false;
 
     bool record = !!options->record_filename;
     struct server_params params = {
+        .serial = options->serial,
         .log_level = options->log_level,
         .crop = options->crop,
         .port_range = options->port_range,
@@ -331,8 +278,9 @@ scrcpy(const struct scrcpy_options *options) {
         .codec_options = options->codec_options,
         .encoder_name = options->encoder_name,
         .force_adb_forward = options->force_adb_forward,
+        .power_off_on_close = options->power_off_on_close,
     };
-    if (!server_start(&server, options->serial, &params)) {
+    if (!server_start(&s->server, &params)) {
         goto end;
     }
 
@@ -343,167 +291,190 @@ scrcpy(const struct scrcpy_options *options) {
         goto end;
     }
 
-    if (!server_connect_to(&server)) {
-        goto end;
-    }
-
     char device_name[DEVICE_NAME_FIELD_LENGTH];
     struct size frame_size;
 
-    // screenrecord does not send frames when the screen content does not
-    // change therefore, we transmit the screen size before the video stream,
-    // to be able to init the window immediately
-    if (!device_read_info(server.video_socket, device_name, &frame_size)) {
+    if (!server_connect_to(&s->server, device_name, &frame_size)) {
         goto end;
     }
 
+    if (options->display && options->control) {
+        if (!file_handler_init(&s->file_handler, s->server.serial,
+                               options->push_target)) {
+            goto end;
+        }
+        file_handler_initialized = true;
+    }
+
     struct decoder *dec = NULL;
-    if (options->display) {
-        if (!fps_counter_init(&fps_counter)) {
-            goto end;
-        }
-        fps_counter_initialized = true;
-
-        if (!video_buffer_init(&video_buffer, &fps_counter,
-                               options->render_expired_frames)) {
-            goto end;
-        }
-        video_buffer_initialized = true;
-
-        if (options->control) {
-            if (!file_handler_init(&file_handler, server.serial,
-                                   options->push_target)) {
-                goto end;
-            }
-            file_handler_initialized = true;
-        }
-
-        decoder_init(&decoder, &video_buffer);
-        dec = &decoder;
+    bool needs_decoder = options->display;
+#ifdef HAVE_V4L2
+    needs_decoder |= !!options->v4l2_device;
+#endif
+    if (needs_decoder) {
+        decoder_init(&s->decoder);
+        dec = &s->decoder;
     }
 
     struct recorder *rec = NULL;
     if (record) {
-        if (!recorder_init(&recorder,
+        if (!recorder_init(&s->recorder,
                            options->record_filename,
                            options->record_format,
                            frame_size)) {
             goto end;
         }
-        rec = &recorder;
+        rec = &s->recorder;
         recorder_initialized = true;
     }
 
     av_log_set_callback(av_log_callback);
 
-    stream_init(&stream, server.video_socket, dec, rec);
+    const struct stream_callbacks stream_cbs = {
+        .on_eos = stream_on_eos,
+    };
+    stream_init(&s->stream, s->server.video_socket, &stream_cbs, NULL);
 
-    // now we consumed the header values, the socket receives the video stream
-    // start the stream
-    if (!stream_start(&stream)) {
-        goto end;
+    if (dec) {
+        stream_add_sink(&s->stream, &dec->packet_sink);
     }
-    stream_started = true;
 
-    if (options->display) {
-        if (options->control) {
-            if (!controller_init(&controller, server.control_socket)) {
-                goto end;
-            }
-            controller_initialized = true;
+    if (rec) {
+        stream_add_sink(&s->stream, &rec->packet_sink);
+    }
 
-            if (!controller_start(&controller)) {
-                goto end;
-            }
-            controller_started = true;
-        }
-
-        const char *window_title =
-            options->window_title ? options->window_title : device_name;
-
-        if (!screen_init_rendering(&screen, window_title, frame_size,
-                                   options->always_on_top, options->window_x,
-                                   options->window_y, options->window_width,
-                                   options->window_height,
-                                   options->window_borderless,
-                                   options->rotation, options->mipmaps)) {
+    if (options->control) {
+        if (!controller_init(&s->controller, s->server.control_socket)) {
             goto end;
         }
+        controller_initialized = true;
+
+        if (!controller_start(&s->controller)) {
+            goto end;
+        }
+        controller_started = true;
 
         if (options->turn_screen_off) {
             struct control_msg msg;
             msg.type = CONTROL_MSG_TYPE_SET_SCREEN_POWER_MODE;
             msg.set_screen_power_mode.mode = SCREEN_POWER_MODE_OFF;
 
-            if (!controller_push_msg(&controller, &msg)) {
+            if (!controller_push_msg(&s->controller, &msg)) {
                 LOGW("Could not request 'set screen power mode'");
             }
         }
-
-        if (options->fullscreen) {
-            screen_switch_fullscreen(&screen);
-        }
     }
 
-    input_manager_init(&input_manager, options);
+    if (options->display) {
+        const char *window_title =
+            options->window_title ? options->window_title : device_name;
 
-    ret = event_loop(options);
+        struct screen_params screen_params = {
+            .window_title = window_title,
+            .frame_size = frame_size,
+            .always_on_top = options->always_on_top,
+            .window_x = options->window_x,
+            .window_y = options->window_y,
+            .window_width = options->window_width,
+            .window_height = options->window_height,
+            .window_borderless = options->window_borderless,
+            .rotation = options->rotation,
+            .mipmaps = options->mipmaps,
+            .fullscreen = options->fullscreen,
+            .buffering_time = options->display_buffer,
+        };
+
+        if (!screen_init(&s->screen, &screen_params)) {
+            goto end;
+        }
+        screen_initialized = true;
+
+        decoder_add_sink(&s->decoder, &s->screen.frame_sink);
+    }
+
+#ifdef HAVE_V4L2
+    if (options->v4l2_device) {
+        if (!sc_v4l2_sink_init(&s->v4l2_sink, options->v4l2_device, frame_size,
+                               options->v4l2_buffer)) {
+            goto end;
+        }
+
+        decoder_add_sink(&s->decoder, &s->v4l2_sink.frame_sink);
+
+        v4l2_sink_initialized = true;
+    }
+#endif
+
+    // now we consumed the header values, the socket receives the video stream
+    // start the stream
+    if (!stream_start(&s->stream)) {
+        goto end;
+    }
+    stream_started = true;
+
+    input_manager_init(&s->input_manager, &s->controller, &s->screen, options);
+
+    ret = event_loop(s, options);
     LOGD("quit...");
 
-    screen_destroy(&screen);
+    // Close the window immediately on closing, because screen_destroy() may
+    // only be called once the stream thread is joined (it may take time)
+    screen_hide_window(&s->screen);
 
 end:
-    // stop stream and controller so that they don't continue once their socket
-    // is shutdown
-    if (stream_started) {
-        stream_stop(&stream);
-    }
+    // The stream is not stopped explicitly, because it will stop by itself on
+    // end-of-stream
     if (controller_started) {
-        controller_stop(&controller);
+        controller_stop(&s->controller);
     }
     if (file_handler_initialized) {
-        file_handler_stop(&file_handler);
+        file_handler_stop(&s->file_handler);
     }
-    if (fps_counter_initialized) {
-        fps_counter_interrupt(&fps_counter);
+    if (screen_initialized) {
+        screen_interrupt(&s->screen);
     }
 
     if (server_started) {
         // shutdown the sockets and kill the server
-        server_stop(&server);
+        server_stop(&s->server);
     }
 
     // now that the sockets are shutdown, the stream and controller are
     // interrupted, we can join them
     if (stream_started) {
-        stream_join(&stream);
+        stream_join(&s->stream);
     }
+
+#ifdef HAVE_V4L2
+    if (v4l2_sink_initialized) {
+        sc_v4l2_sink_destroy(&s->v4l2_sink);
+    }
+#endif
+
+    // Destroy the screen only after the stream is guaranteed to be finished,
+    // because otherwise the screen could receive new frames after destruction
+    if (screen_initialized) {
+        screen_join(&s->screen);
+        screen_destroy(&s->screen);
+    }
+
     if (controller_started) {
-        controller_join(&controller);
+        controller_join(&s->controller);
     }
     if (controller_initialized) {
-        controller_destroy(&controller);
+        controller_destroy(&s->controller);
     }
 
     if (recorder_initialized) {
-        recorder_destroy(&recorder);
+        recorder_destroy(&s->recorder);
     }
 
     if (file_handler_initialized) {
-        file_handler_join(&file_handler);
-        file_handler_destroy(&file_handler);
+        file_handler_join(&s->file_handler);
+        file_handler_destroy(&s->file_handler);
     }
 
-    if (video_buffer_initialized) {
-        video_buffer_destroy(&video_buffer);
-    }
-
-    if (fps_counter_initialized) {
-        fps_counter_join(&fps_counter);
-        fps_counter_destroy(&fps_counter);
-    }
-
-    server_destroy(&server);
+    server_destroy(&s->server);
 
     return ret;
 }

app/src/scrcpy.h

@@ -7,7 +7,10 @@
 #include <stddef.h>
 #include <stdint.h>
 
+#include "util/tick.h"
+
 enum sc_log_level {
+    SC_LOG_LEVEL_VERBOSE,
     SC_LOG_LEVEL_DEBUG,
     SC_LOG_LEVEL_INFO,
     SC_LOG_LEVEL_WARN,
@@ -20,6 +23,16 @@ enum sc_record_format {
     SC_RECORD_FORMAT_MKV,
 };
 
+enum sc_lock_video_orientation {
+    SC_LOCK_VIDEO_ORIENTATION_UNLOCKED = -1,
+    // lock the current orientation when scrcpy starts
+    SC_LOCK_VIDEO_ORIENTATION_INITIAL = -2,
+    SC_LOCK_VIDEO_ORIENTATION_0 = 0,
+    SC_LOCK_VIDEO_ORIENTATION_1,
+    SC_LOCK_VIDEO_ORIENTATION_2,
+    SC_LOCK_VIDEO_ORIENTATION_3,
+};
+
 #define SC_MAX_SHORTCUT_MODS 8
 
 enum sc_shortcut_mod {
@@ -52,6 +65,7 @@ struct scrcpy_options {
     const char *render_driver;
     const char *codec_options;
     const char *encoder_name;
+    const char *v4l2_device;
     enum sc_log_level log_level;
     enum sc_record_format record_format;
     struct sc_port_range port_range;
@@ -59,20 +73,21 @@ struct scrcpy_options {
     uint16_t max_size;
     uint32_t bit_rate;
     uint16_t max_fps;
-    int8_t lock_video_orientation;
+    enum sc_lock_video_orientation lock_video_orientation;
     uint8_t rotation;
     int16_t window_x; // SC_WINDOW_POSITION_UNDEFINED for "auto"
     int16_t window_y; // SC_WINDOW_POSITION_UNDEFINED for "auto"
     uint16_t window_width;
     uint16_t window_height;
     uint32_t display_id;
+    sc_tick display_buffer;
+    sc_tick v4l2_buffer;
     bool show_touches;
     bool fullscreen;
     bool always_on_top;
     bool control;
     bool display;
     bool turn_screen_off;
-    bool render_expired_frames;
     bool prefer_text;
     bool window_borderless;
     bool mipmaps;
@@ -82,6 +97,7 @@ struct scrcpy_options {
     bool forward_key_repeat;
     bool forward_all_clicks;
     bool legacy_paste;
+    bool power_off_on_close;
 };
 
 #define SCRCPY_OPTIONS_DEFAULT { \
@@ -93,6 +109,7 @@ struct scrcpy_options {
     .render_driver = NULL, \
     .codec_options = NULL, \
     .encoder_name = NULL, \
+    .v4l2_device = NULL, \
     .log_level = SC_LOG_LEVEL_INFO, \
     .record_format = SC_RECORD_FORMAT_AUTO, \
     .port_range = { \
@@ -103,23 +120,24 @@ struct scrcpy_options {
         .data = {SC_MOD_LALT, SC_MOD_LSUPER}, \
         .count = 2, \
     }, \
-    .max_size = DEFAULT_MAX_SIZE, \
+    .max_size = 0, \
     .bit_rate = DEFAULT_BIT_RATE, \
     .max_fps = 0, \
-    .lock_video_orientation = DEFAULT_LOCK_VIDEO_ORIENTATION, \
+    .lock_video_orientation = SC_LOCK_VIDEO_ORIENTATION_UNLOCKED, \
     .rotation = 0, \
     .window_x = SC_WINDOW_POSITION_UNDEFINED, \
     .window_y = SC_WINDOW_POSITION_UNDEFINED, \
     .window_width = 0, \
     .window_height = 0, \
     .display_id = 0, \
+    .display_buffer = 0, \
+    .v4l2_buffer = 0, \
     .show_touches = false, \
     .fullscreen = false, \
     .always_on_top = false, \
     .control = true, \
     .display = true, \
     .turn_screen_off = false, \
-    .render_expired_frames = false, \
     .prefer_text = false, \
     .window_borderless = false, \
     .mipmaps = true, \
@@ -129,6 +147,7 @@ struct scrcpy_options {
     .forward_key_repeat = true, \
     .forward_all_clicks = false, \
     .legacy_paste = false, \
+    .power_off_on_close = false, \
 }
 
 bool

app/src/screen.c

@@ -4,15 +4,17 @@
 #include <string.h>
 #include <SDL2/SDL.h>
 
+#include "events.h"
 #include "icon.xpm"
 #include "scrcpy.h"
 #include "tiny_xpm.h"
 #include "video_buffer.h"
-#include "util/lock.h"
 #include "util/log.h"
 
 #define DISPLAY_MARGINS 96
 
+#define DOWNCAST(SINK) container_of(SINK, struct screen, frame_sink)
+
 static inline struct size
 get_rotated_size(struct size size, int rotation) {
     struct size rotated_size;
@@ -39,6 +41,18 @@ get_window_size(const struct screen *screen) {
     return size;
 }
 
+static struct point
+get_window_position(const struct screen *screen) {
+    int x;
+    int y;
+    SDL_GetWindowPosition(screen->window, &x, &y);
+
+    struct point point;
+    point.x = x;
+    point.y = y;
+    return point;
+}
+
 // set the window size to be applied when fullscreen is disabled
 static void
 set_window_size(struct screen *screen, struct size new_size) {
@@ -120,13 +134,6 @@ get_optimal_size(struct size current_size, struct size content_size) {
     return window_size;
 }
 
-// same as get_optimal_size(), but read the current size from the window
-static inline struct size
-get_optimal_window_size(const struct screen *screen, struct size content_size) {
-    struct size window_size = get_window_size(screen);
-    return get_optimal_size(window_size, content_size);
-}
-
 // initially, there is no current size, so use the frame size as current size
 // req_width and req_height, if not 0, are the sizes requested by the user
 static inline struct size
@@ -191,11 +198,6 @@ screen_update_content_rect(struct screen *screen) {
     }
 }
 
-void
-screen_init(struct screen *screen) {
-    *screen = (struct screen) SCREEN_INITIALIZER;
-}
-
 static inline SDL_Texture *
 create_texture(struct screen *screen) {
     SDL_Renderer *renderer = screen->renderer;
@@ -223,27 +225,123 @@ create_texture(struct screen *screen) {
     return texture;
 }
 
-bool
-screen_init_rendering(struct screen *screen, const char *window_title,
-                      struct size frame_size, bool always_on_top,
-                      int16_t window_x, int16_t window_y, uint16_t window_width,
-                      uint16_t window_height, bool window_borderless,
-                      uint8_t rotation, bool mipmaps) {
-    screen->frame_size = frame_size;
-    screen->rotation = rotation;
-    if (rotation) {
-        LOGI("Initial display rotation set to %u", rotation);
+#if defined(__APPLE__) || defined(__WINDOWS__)
+# define CONTINUOUS_RESIZING_WORKAROUND
+#endif
+
+#ifdef CONTINUOUS_RESIZING_WORKAROUND
+// On Windows and MacOS, resizing blocks the event loop, so resizing events are
+// not triggered. As a workaround, handle them in an event handler.
+//
+// <https://bugzilla.libsdl.org/show_bug.cgi?id=2077>
+// <https://stackoverflow.com/a/40693139/1987178>
+static int
+event_watcher(void *data, SDL_Event *event) {
+    struct screen *screen = data;
+    if (event->type == SDL_WINDOWEVENT
+            && event->window.event == SDL_WINDOWEVENT_RESIZED) {
+        // In practice, it seems to always be called from the same thread in
+        // that specific case. Anyway, it's just a workaround.
+        screen_render(screen, true);
     }
-    struct size content_size = get_rotated_size(frame_size, screen->rotation);
+    return 0;
+}
+#endif
+
+static bool
+screen_frame_sink_open(struct sc_frame_sink *sink) {
+    struct screen *screen = DOWNCAST(sink);
+    (void) screen;
+#ifndef NDEBUG
+    screen->open = true;
+#endif
+
+    // nothing to do, the screen is already open on the main thread
+    return true;
+}
+
+static void
+screen_frame_sink_close(struct sc_frame_sink *sink) {
+    struct screen *screen = DOWNCAST(sink);
+    (void) screen;
+#ifndef NDEBUG
+    screen->open = false;
+#endif
+
+    // nothing to do, the screen lifecycle is not managed by the frame producer
+}
+
+static bool
+screen_frame_sink_push(struct sc_frame_sink *sink, const AVFrame *frame) {
+    struct screen *screen = DOWNCAST(sink);
+    return sc_video_buffer_push(&screen->vb, frame);
+}
+
+static void
+sc_video_buffer_on_new_frame(struct sc_video_buffer *vb, bool previous_skipped,
+                             void *userdata) {
+    (void) vb;
+    struct screen *screen = userdata;
+
+    if (previous_skipped) {
+        fps_counter_add_skipped_frame(&screen->fps_counter);
+        // The EVENT_NEW_FRAME triggered for the previous frame will consume
+        // this new frame instead
+    } else {
+        static SDL_Event new_frame_event = {
+            .type = EVENT_NEW_FRAME,
+        };
+
+        // Post the event on the UI thread
+        SDL_PushEvent(&new_frame_event);
+    }
+}
+
+bool
+screen_init(struct screen *screen, const struct screen_params *params) {
+    screen->resize_pending = false;
+    screen->has_frame = false;
+    screen->fullscreen = false;
+    screen->maximized = false;
+
+    static const struct sc_video_buffer_callbacks cbs = {
+        .on_new_frame = sc_video_buffer_on_new_frame,
+    };
+
+    bool ok = sc_video_buffer_init(&screen->vb, params->buffering_time, &cbs,
+                                   screen);
+    if (!ok) {
+        LOGE("Could not initialize video buffer");
+        return false;
+    }
+
+    ok = sc_video_buffer_start(&screen->vb);
+    if (!ok) {
+        LOGE("Could not start video_buffer");
+        goto error_destroy_video_buffer;
+    }
+
+    if (!fps_counter_init(&screen->fps_counter)) {
+        LOGE("Could not initialize FPS counter");
+        goto error_stop_and_join_video_buffer;
+    }
+
+    screen->frame_size = params->frame_size;
+    screen->rotation = params->rotation;
+    if (screen->rotation) {
+        LOGI("Initial display rotation set to %u", screen->rotation);
+    }
+    struct size content_size =
+        get_rotated_size(screen->frame_size, screen->rotation);
     screen->content_size = content_size;
 
-    struct size window_size =
-        get_initial_optimal_size(content_size, window_width, window_height);
-    uint32_t window_flags = SDL_WINDOW_HIDDEN | SDL_WINDOW_RESIZABLE;
-#ifdef HIDPI_SUPPORT
-    window_flags |= SDL_WINDOW_ALLOW_HIGHDPI;
-#endif
-    if (always_on_top) {
+    struct size window_size = get_initial_optimal_size(content_size,
+                                                       params->window_width,
+                                                       params->window_height);
+    uint32_t window_flags = SDL_WINDOW_HIDDEN
+                          | SDL_WINDOW_RESIZABLE
+                          | SDL_WINDOW_ALLOW_HIGHDPI;
+    if (params->always_on_top) {
 #ifdef SCRCPY_SDL_HAS_WINDOW_ALWAYS_ON_TOP
         window_flags |= SDL_WINDOW_ALWAYS_ON_TOP;
 #else
@@ -251,28 +349,27 @@ screen_init_rendering(struct screen *screen, const char *window_title,
              "(compile with SDL >= 2.0.5 to enable it)");
 #endif
     }
-    if (window_borderless) {
+    if (params->window_borderless) {
         window_flags |= SDL_WINDOW_BORDERLESS;
     }
 
-    int x = window_x != SC_WINDOW_POSITION_UNDEFINED
-          ? window_x : (int) SDL_WINDOWPOS_UNDEFINED;
-    int y = window_y != SC_WINDOW_POSITION_UNDEFINED
-          ? window_y : (int) SDL_WINDOWPOS_UNDEFINED;
-    screen->window = SDL_CreateWindow(window_title, x, y,
+    int x = params->window_x != SC_WINDOW_POSITION_UNDEFINED
+          ? params->window_x : (int) SDL_WINDOWPOS_UNDEFINED;
+    int y = params->window_y != SC_WINDOW_POSITION_UNDEFINED
+          ? params->window_y : (int) SDL_WINDOWPOS_UNDEFINED;
+    screen->window = SDL_CreateWindow(params->window_title, x, y,
                                       window_size.width, window_size.height,
                                       window_flags);
     if (!screen->window) {
         LOGC("Could not create window: %s", SDL_GetError());
-        return false;
+        goto error_destroy_fps_counter;
     }
 
     screen->renderer = SDL_CreateRenderer(screen->window, -1,
                                           SDL_RENDERER_ACCELERATED);
     if (!screen->renderer) {
         LOGC("Could not create renderer: %s", SDL_GetError());
-        screen_destroy(screen);
-        return false;
+        goto error_destroy_window;
     }
 
     SDL_RendererInfo renderer_info;
@@ -280,15 +377,17 @@ screen_init_rendering(struct screen *screen, const char *window_title,
     const char *renderer_name = r ? NULL : renderer_info.name;
     LOGI("Renderer: %s", renderer_name ? renderer_name : "(unknown)");
 
+    screen->mipmaps = false;
+
     // starts with "opengl"
-    screen->use_opengl = renderer_name && !strncmp(renderer_name, "opengl", 6);
-    if (screen->use_opengl) {
+    bool use_opengl = renderer_name && !strncmp(renderer_name, "opengl", 6);
+    if (use_opengl) {
         struct sc_opengl *gl = &screen->gl;
         sc_opengl_init(gl);
 
         LOGI("OpenGL version: %s", gl->version);
 
-        if (mipmaps) {
+        if (params->mipmaps) {
             bool supports_mipmaps =
                 sc_opengl_version_at_least(gl, 3, 0, /* OpenGL 3.0+ */
                                                2, 0  /* OpenGL ES 2.0+ */);
@@ -302,7 +401,7 @@ screen_init_rendering(struct screen *screen, const char *window_title,
         } else {
             LOGI("Trilinear filtering disabled");
         }
-    } else {
+    } else if (params->mipmaps) {
         LOGD("Trilinear filtering disabled (not an OpenGL renderer)");
     }
 
@@ -314,13 +413,18 @@ screen_init_rendering(struct screen *screen, const char *window_title,
         LOGW("Could not load icon");
     }
 
-    LOGI("Initial texture: %" PRIu16 "x%" PRIu16, frame_size.width,
-                                                  frame_size.height);
+    LOGI("Initial texture: %" PRIu16 "x%" PRIu16, params->frame_size.width,
+                                                  params->frame_size.height);
     screen->texture = create_texture(screen);
     if (!screen->texture) {
         LOGC("Could not create texture: %s", SDL_GetError());
-        screen_destroy(screen);
-        return false;
+        goto error_destroy_renderer;
+    }
+
+    screen->frame = av_frame_alloc();
+    if (!screen->frame) {
+        LOGC("Could not create screen frame");
+        goto error_destroy_texture;
     }
 
     // Reset the window size to trigger a SIZE_CHANGED event, to workaround
@@ -330,25 +434,78 @@ screen_init_rendering(struct screen *screen, const char *window_title,
 
     screen_update_content_rect(screen);
 
+    if (params->fullscreen) {
+        screen_switch_fullscreen(screen);
+    }
+
+#ifdef CONTINUOUS_RESIZING_WORKAROUND
+    SDL_AddEventWatch(event_watcher, screen);
+#endif
+
+    static const struct sc_frame_sink_ops ops = {
+        .open = screen_frame_sink_open,
+        .close = screen_frame_sink_close,
+        .push = screen_frame_sink_push,
+    };
+
+    screen->frame_sink.ops = &ops;
+
+#ifndef NDEBUG
+    screen->open = false;
+#endif
+
     return true;
+
+error_destroy_texture:
+    SDL_DestroyTexture(screen->texture);
+error_destroy_renderer:
+    SDL_DestroyRenderer(screen->renderer);
+error_destroy_window:
+    SDL_DestroyWindow(screen->window);
+error_destroy_fps_counter:
+    fps_counter_destroy(&screen->fps_counter);
+error_stop_and_join_video_buffer:
+    sc_video_buffer_stop(&screen->vb);
+    sc_video_buffer_join(&screen->vb);
+error_destroy_video_buffer:
+    sc_video_buffer_destroy(&screen->vb);
+
+    return false;
 }
 
-void
+static void
 screen_show_window(struct screen *screen) {
     SDL_ShowWindow(screen->window);
 }
 
+void
+screen_hide_window(struct screen *screen) {
+    SDL_HideWindow(screen->window);
+}
+
+void
+screen_interrupt(struct screen *screen) {
+    sc_video_buffer_stop(&screen->vb);
+    fps_counter_interrupt(&screen->fps_counter);
+}
+
+void
+screen_join(struct screen *screen) {
+    sc_video_buffer_join(&screen->vb);
+    fps_counter_join(&screen->fps_counter);
+}
+
 void
 screen_destroy(struct screen *screen) {
-    if (screen->texture) {
-        SDL_DestroyTexture(screen->texture);
-    }
-    if (screen->renderer) {
-        SDL_DestroyRenderer(screen->renderer);
-    }
-    if (screen->window) {
-        SDL_DestroyWindow(screen->window);
-    }
+#ifndef NDEBUG
+    assert(!screen->open);
+#endif
+    av_frame_free(&screen->frame);
+    SDL_DestroyTexture(screen->texture);
+    SDL_DestroyRenderer(screen->renderer);
+    SDL_DestroyWindow(screen->window);
+    fps_counter_destroy(&screen->fps_counter);
+    sc_video_buffer_destroy(&screen->vb);
 }
 
 static void
@@ -445,24 +602,25 @@ update_texture(struct screen *screen, const AVFrame *frame) {
             frame->data[2], frame->linesize[2]);
 
     if (screen->mipmaps) {
-        assert(screen->use_opengl);
         SDL_GL_BindTexture(screen->texture, NULL, NULL);
         screen->gl.GenerateMipmap(GL_TEXTURE_2D);
         SDL_GL_UnbindTexture(screen->texture);
     }
 }
 
-bool
-screen_update_frame(struct screen *screen, struct video_buffer *vb) {
-    mutex_lock(vb->mutex);
-    const AVFrame *frame = video_buffer_consume_rendered_frame(vb);
+static bool
+screen_update_frame(struct screen *screen) {
+    av_frame_unref(screen->frame);
+    sc_video_buffer_consume(&screen->vb, screen->frame);
+    AVFrame *frame = screen->frame;
+
+    fps_counter_add_rendered_frame(&screen->fps_counter);
+
     struct size new_frame_size = {frame->width, frame->height};
     if (!prepare_for_frame(screen, new_frame_size)) {
-        mutex_unlock(vb->mutex);
         return false;
     }
     update_texture(screen, frame);
-    mutex_unlock(vb->mutex);
 
     screen_render(screen, false);
     return true;
@@ -525,9 +683,20 @@ screen_resize_to_fit(struct screen *screen) {
         return;
     }
 
+    struct point point = get_window_position(screen);
+    struct size window_size = get_window_size(screen);
+
     struct size optimal_size =
-        get_optimal_window_size(screen, screen->content_size);
+        get_optimal_size(window_size, screen->content_size);
+
+    // Center the window related to the device screen
+    assert(optimal_size.width <= window_size.width);
+    assert(optimal_size.height <= window_size.height);
+    uint32_t new_x = point.x + (window_size.width - optimal_size.width) / 2;
+    uint32_t new_y = point.y + (window_size.height - optimal_size.height) / 2;
+
     SDL_SetWindowSize(screen->window, optimal_size.width, optimal_size.height);
+    SDL_SetWindowPosition(screen->window, new_x, new_y);
     LOGD("Resized to optimal size: %ux%u", optimal_size.width,
                                            optimal_size.height);
 }
@@ -549,31 +718,53 @@ screen_resize_to_pixel_perfect(struct screen *screen) {
                                             content_size.height);
 }
 
-void
-screen_handle_window_event(struct screen *screen,
-                           const SDL_WindowEvent *event) {
-    switch (event->event) {
-        case SDL_WINDOWEVENT_EXPOSED:
-            screen_render(screen, true);
-            break;
-        case SDL_WINDOWEVENT_SIZE_CHANGED:
-            screen_render(screen, true);
-            break;
-        case SDL_WINDOWEVENT_MAXIMIZED:
-            screen->maximized = true;
-            break;
-        case SDL_WINDOWEVENT_RESTORED:
-            if (screen->fullscreen) {
-                // On Windows, in maximized+fullscreen, disabling fullscreen
-                // mode unexpectedly triggers the "restored" then "maximized"
-                // events, leaving the window in a weird state (maximized
-                // according to the events, but not maximized visually).
-                break;
+bool
+screen_handle_event(struct screen *screen, SDL_Event *event) {
+    switch (event->type) {
+        case EVENT_NEW_FRAME:
+            if (!screen->has_frame) {
+                screen->has_frame = true;
+                // this is the very first frame, show the window
+                screen_show_window(screen);
             }
-            screen->maximized = false;
-            apply_pending_resize(screen);
-            break;
+            bool ok = screen_update_frame(screen);
+            if (!ok) {
+                LOGW("Frame update failed\n");
+            }
+            return true;
+        case SDL_WINDOWEVENT:
+            if (!screen->has_frame) {
+                // Do nothing
+                return true;
+            }
+            switch (event->window.event) {
+                case SDL_WINDOWEVENT_EXPOSED:
+                    screen_render(screen, true);
+                    break;
+                case SDL_WINDOWEVENT_SIZE_CHANGED:
+                    screen_render(screen, true);
+                    break;
+                case SDL_WINDOWEVENT_MAXIMIZED:
+                    screen->maximized = true;
+                    break;
+                case SDL_WINDOWEVENT_RESTORED:
+                    if (screen->fullscreen) {
+                        // On Windows, in maximized+fullscreen, disabling
+                        // fullscreen mode unexpectedly triggers the "restored"
+                        // then "maximized" events, leaving the window in a
+                        // weird state (maximized according to the events, but
+                        // not maximized visually).
+                        break;
+                    }
+                    screen->maximized = false;
+                    apply_pending_resize(screen);
+                    screen_render(screen, true);
+                    break;
+            }
+            return true;
     }
+
+    return false;
 }
 
 struct point

app/src/screen.h

@@ -8,15 +8,24 @@
 #include <libavformat/avformat.h>
 
 #include "coords.h"
+#include "fps_counter.h"
 #include "opengl.h"
-
-struct video_buffer;
+#include "trait/frame_sink.h"
+#include "video_buffer.h"
 
 struct screen {
+    struct sc_frame_sink frame_sink; // frame sink trait
+
+#ifndef NDEBUG
+    bool open; // track the open/close state to assert correct behavior
+#endif
+
+    struct sc_video_buffer vb;
+    struct fps_counter fps_counter;
+
     SDL_Window *window;
     SDL_Renderer *renderer;
     SDL_Texture *texture;
-    bool use_opengl;
     struct sc_opengl gl;
     struct size frame_size;
     struct size content_size; // rotated frame_size
@@ -33,67 +42,54 @@ struct screen {
     bool has_frame;
     bool fullscreen;
     bool maximized;
-    bool no_window;
     bool mipmaps;
+
+    AVFrame *frame;
 };
 
-#define SCREEN_INITIALIZER { \
-    .window = NULL, \
-    .renderer = NULL, \
-    .texture = NULL, \
-    .use_opengl = false, \
-    .gl = {0}, \
-    .frame_size = { \
-        .width = 0, \
-        .height = 0, \
-    }, \
-    .content_size = { \
-        .width = 0, \
-        .height = 0, \
-    }, \
-    .resize_pending = false, \
-    .windowed_content_size = { \
-        .width = 0, \
-        .height = 0, \
-    }, \
-    .rotation = 0, \
-    .rect = { \
-        .x = 0, \
-        .y = 0, \
-        .w = 0, \
-        .h = 0, \
-    }, \
-    .has_frame = false, \
-    .fullscreen = false, \
-    .maximized = false, \
-    .no_window = false, \
-    .mipmaps = false, \
-}
+struct screen_params {
+    const char *window_title;
+    struct size frame_size;
+    bool always_on_top;
 
-// initialize default values
-void
-screen_init(struct screen *screen);
+    int16_t window_x;
+    int16_t window_y;
+    uint16_t window_width;  // accepts SC_WINDOW_POSITION_UNDEFINED
+    uint16_t window_height; // accepts SC_WINDOW_POSITION_UNDEFINED
+
+    bool window_borderless;
+
+    uint8_t rotation;
+    bool mipmaps;
+
+    bool fullscreen;
+
+    sc_tick buffering_time;
+};
 
 // initialize screen, create window, renderer and texture (window is hidden)
-// window_x and window_y accept SC_WINDOW_POSITION_UNDEFINED
 bool
-screen_init_rendering(struct screen *screen, const char *window_title,
-                      struct size frame_size, bool always_on_top,
-                      int16_t window_x, int16_t window_y, uint16_t window_width,
-                      uint16_t window_height, bool window_borderless,
-                      uint8_t rotation, bool mipmaps);
+screen_init(struct screen *screen, const struct screen_params *params);
 
-// show the window
+// request to interrupt any inner thread
+// must be called before screen_join()
 void
-screen_show_window(struct screen *screen);
+screen_interrupt(struct screen *screen);
+
+// join any inner thread
+void
+screen_join(struct screen *screen);
 
 // destroy window, renderer and texture (if any)
 void
 screen_destroy(struct screen *screen);
 
-// resize if necessary and write the rendered frame into the texture
-bool
-screen_update_frame(struct screen *screen, struct video_buffer *vb);
+// hide the window
+//
+// It is used to hide the window immediately on closing without waiting for
+// screen_destroy()
+void
+screen_hide_window(struct screen *screen);
 
 // render the texture to the renderer
 //
@@ -118,9 +114,9 @@ screen_resize_to_pixel_perfect(struct screen *screen);
 void
 screen_set_rotation(struct screen *screen, unsigned rotation);
 
-// react to window events
-void
-screen_handle_window_event(struct screen *screen, const SDL_WindowEvent *event);
+// react to SDL events
+bool
+screen_handle_event(struct screen *screen, SDL_Event *event);
 
 // convert point from window coordinates to frame coordinates
 // x and y are expressed in pixels

app/src/server.c

@@ -5,12 +5,10 @@
 #include <inttypes.h>
 #include <libgen.h>
 #include <stdio.h>
-#include <SDL2/SDL_thread.h>
 #include <SDL2/SDL_timer.h>
 #include <SDL2/SDL_platform.h>
 
 #include "adb.h"
-#include "util/lock.h"
 #include "util/log.h"
 #include "util/net.h"
 #include "util/str_util.h"
@@ -33,7 +31,7 @@ get_server_path(void) {
 #ifdef __WINDOWS__
         char *server_path = utf8_from_wide_char(server_path_env);
 #else
-        char *server_path = SDL_strdup(server_path_env);
+        char *server_path = strdup(server_path_env);
 #endif
         if (!server_path) {
             LOGE("Could not allocate memory");
@@ -45,7 +43,7 @@ get_server_path(void) {
 
 #ifndef PORTABLE
     LOGD("Using server: " DEFAULT_SERVER_PATH);
-    char *server_path = SDL_strdup(DEFAULT_SERVER_PATH);
+    char *server_path = strdup(DEFAULT_SERVER_PATH);
     if (!server_path) {
         LOGE("Could not allocate memory");
         return NULL;
@@ -60,19 +58,19 @@ get_server_path(void) {
         LOGE("Could not get executable path, "
              "using " SERVER_FILENAME " from current directory");
         // not found, use current directory
-        return SERVER_FILENAME;
+        return strdup(SERVER_FILENAME);
     }
     char *dir = dirname(executable_path);
     size_t dirlen = strlen(dir);
 
     // sizeof(SERVER_FILENAME) gives statically the size including the null byte
     size_t len = dirlen + 1 + sizeof(SERVER_FILENAME);
-    char *server_path = SDL_malloc(len);
+    char *server_path = malloc(len);
     if (!server_path) {
         LOGE("Could not alloc server path string, "
              "using " SERVER_FILENAME " from current directory");
-        SDL_free(executable_path);
-        return SERVER_FILENAME;
+        free(executable_path);
+        return strdup(SERVER_FILENAME);
     }
 
     memcpy(server_path, dir, dirlen);
@@ -80,7 +78,7 @@ get_server_path(void) {
     memcpy(&server_path[dirlen + 1], SERVER_FILENAME, sizeof(SERVER_FILENAME));
     // the final null byte has been copied with SERVER_FILENAME
 
-    SDL_free(executable_path);
+    free(executable_path);
 
     LOGD("Using server (portable): %s", server_path);
     return server_path;
@@ -95,11 +93,11 @@ push_server(const char *serial) {
     }
     if (!is_regular_file(server_path)) {
         LOGE("'%s' does not exist or is not a regular file\n", server_path);
-        SDL_free(server_path);
+        free(server_path);
         return false;
     }
     process_t process = adb_push(serial, server_path, DEVICE_SERVER_PATH);
-    SDL_free(server_path);
+    free(server_path);
     return process_check_success(process, "adb push", true);
 }
 
@@ -237,6 +235,8 @@ enable_tunnel_any_port(struct server *server, struct sc_port_range port_range,
 static const char *
 log_level_to_server_string(enum sc_log_level level) {
     switch (level) {
+        case SC_LOG_LEVEL_VERBOSE:
+            return "verbose";
         case SC_LOG_LEVEL_DEBUG:
             return "debug";
         case SC_LOG_LEVEL_INFO:
@@ -295,6 +295,7 @@ execute_server(struct server *server, const struct server_params *params) {
         params->stay_awake ? "true" : "false",
         params->codec_options ? params->codec_options : "-",
         params->encoder_name ? params->encoder_name : "-",
+        params->power_off_on_close ? "true" : "false",
     };
 #ifdef SERVER_DEBUGGER
     LOGI("Server debugger waiting for a client on device port "
@@ -307,7 +308,7 @@ execute_server(struct server *server, const struct server_params *params) {
     //     Port: 5005
     // Then click on "Debug"
 #endif
-    return adb_execute(server->serial, cmd, sizeof(cmd) / sizeof(cmd[0]));
+    return adb_execute(server->serial, cmd, ARRAY_LEN(cmd));
 }
 
 static socket_t
@@ -357,18 +358,17 @@ bool
 server_init(struct server *server) {
     server->serial = NULL;
     server->process = PROCESS_NONE;
-    server->wait_server_thread = NULL;
     atomic_flag_clear_explicit(&server->server_socket_closed,
                                memory_order_relaxed);
 
-    server->mutex = SDL_CreateMutex();
-    if (!server->mutex) {
+    bool ok = sc_mutex_init(&server->mutex);
+    if (!ok) {
         return false;
     }
 
-    server->process_terminated_cond = SDL_CreateCond();
-    if (!server->process_terminated_cond) {
-        SDL_DestroyMutex(server->mutex);
+    ok = sc_cond_init(&server->process_terminated_cond);
+    if (!ok) {
+        sc_mutex_destroy(&server->mutex);
         return false;
     }
 
@@ -378,8 +378,6 @@ server_init(struct server *server) {
     server->video_socket = INVALID_SOCKET;
     server->control_socket = INVALID_SOCKET;
 
-    server->port_range.first = 0;
-    server->port_range.last = 0;
     server->local_port = 0;
 
     server->tunnel_enabled = false;
@@ -393,10 +391,10 @@ run_wait_server(void *data) {
     struct server *server = data;
     process_wait(server->process, false); // ignore exit code
 
-    mutex_lock(server->mutex);
+    sc_mutex_lock(&server->mutex);
     server->process_terminated = true;
-    cond_signal(server->process_terminated_cond);
-    mutex_unlock(server->mutex);
+    sc_cond_signal(&server->process_terminated_cond);
+    sc_mutex_unlock(&server->mutex);
 
     // no need for synchronization, server_socket is initialized before this
     // thread was created
@@ -411,30 +409,28 @@ run_wait_server(void *data) {
 }
 
 bool
-server_start(struct server *server, const char *serial,
-             const struct server_params *params) {
-    server->port_range = params->port_range;
-
-    if (serial) {
-        server->serial = SDL_strdup(serial);
+server_start(struct server *server, const struct server_params *params) {
+    if (params->serial) {
+        server->serial = strdup(params->serial);
         if (!server->serial) {
             return false;
         }
     }
 
-    if (!push_server(serial)) {
-        goto error1;
+    if (!push_server(params->serial)) {
+        /* server->serial will be freed on server_destroy() */
+        return false;
     }
 
     if (!enable_tunnel_any_port(server, params->port_range,
                                 params->force_adb_forward)) {
-        goto error1;
+        return false;
     }
 
     // server will connect to our server socket
     server->process = execute_server(server, params);
     if (server->process == PROCESS_NONE) {
-        goto error2;
+        goto error;
     }
 
     // If the server process dies before connecting to the server socket, then
@@ -443,19 +439,19 @@ server_start(struct server *server, const char *serial,
     // things simple and multiplatform, just spawn a new thread waiting for the
     // server process and calling shutdown()/close() on the server socket if
     // necessary to wake up any accept() blocking call.
-    server->wait_server_thread =
-        SDL_CreateThread(run_wait_server, "wait-server", server);
-    if (!server->wait_server_thread) {
+    bool ok = sc_thread_create(&server->wait_server_thread, run_wait_server,
+                               "wait-server", server);
+    if (!ok) {
         process_terminate(server->process);
         process_wait(server->process, true); // ignore exit code
-        goto error2;
+        goto error;
     }
 
     server->tunnel_enabled = true;
 
     return true;
 
-error2:
+error:
     if (!server->tunnel_forward) {
         bool was_closed =
             atomic_flag_test_and_set(&server->server_socket_closed);
@@ -465,13 +461,32 @@ error2:
         close_socket(server->server_socket);
     }
     disable_tunnel(server);
-error1:
-    SDL_free(server->serial);
+
     return false;
 }
 
+static bool
+device_read_info(socket_t device_socket, char *device_name, struct size *size) {
+    unsigned char buf[DEVICE_NAME_FIELD_LENGTH + 4];
+    int r = net_recv_all(device_socket, buf, sizeof(buf));
+    if (r < DEVICE_NAME_FIELD_LENGTH + 4) {
+        LOGE("Could not retrieve device information");
+        return false;
+    }
+    // in case the client sends garbage
+    buf[DEVICE_NAME_FIELD_LENGTH - 1] = '\0';
+    // strcpy is safe here, since name contains at least
+    // DEVICE_NAME_FIELD_LENGTH bytes and strlen(buf) < DEVICE_NAME_FIELD_LENGTH
+    strcpy(device_name, (char *) buf);
+    size->width = (buf[DEVICE_NAME_FIELD_LENGTH] << 8)
+            | buf[DEVICE_NAME_FIELD_LENGTH + 1];
+    size->height = (buf[DEVICE_NAME_FIELD_LENGTH + 2] << 8)
+            | buf[DEVICE_NAME_FIELD_LENGTH + 3];
+    return true;
+}
+
 bool
-server_connect_to(struct server *server) {
+server_connect_to(struct server *server, char *device_name, struct size *size) {
     if (!server->tunnel_forward) {
         server->video_socket = net_accept(server->server_socket);
         if (server->video_socket == INVALID_SOCKET) {
@@ -511,7 +526,8 @@ server_connect_to(struct server *server) {
     disable_tunnel(server); // ignore failure
     server->tunnel_enabled = false;
 
-    return true;
+    // The sockets will be closed on stop if device_read_info() fails
+    return device_read_info(server->video_socket, device_name, size);
 }
 
 void
@@ -535,33 +551,33 @@ server_stop(struct server *server) {
     }
 
     // Give some delay for the server to terminate properly
-    mutex_lock(server->mutex);
-    int r = 0;
+    sc_mutex_lock(&server->mutex);
+    bool signaled = false;
     if (!server->process_terminated) {
-#define WATCHDOG_DELAY_MS 1000
-        r = cond_wait_timeout(server->process_terminated_cond,
-                              server->mutex,
-                              WATCHDOG_DELAY_MS);
+#define WATCHDOG_DELAY SC_TICK_FROM_SEC(1)
+        signaled = sc_cond_timedwait(&server->process_terminated_cond,
+                                     &server->mutex,
+                                     sc_tick_now() + WATCHDOG_DELAY);
     }
-    mutex_unlock(server->mutex);
+    sc_mutex_unlock(&server->mutex);
 
     // After this delay, kill the server if it's not dead already.
     // On some devices, closing the sockets is not sufficient to wake up the
     // blocking calls while the device is asleep.
-    if (r == SDL_MUTEX_TIMEDOUT) {
+    if (!signaled) {
         // The process is terminated, but not reaped (closed) yet, so its PID
         // is still valid.
         LOGW("Killing the server...");
         process_terminate(server->process);
     }
 
-    SDL_WaitThread(server->wait_server_thread, NULL);
+    sc_thread_join(&server->wait_server_thread, NULL);
     process_close(server->process);
 }
 
 void
 server_destroy(struct server *server) {
-    SDL_free(server->serial);
-    SDL_DestroyCond(server->process_terminated_cond);
-    SDL_DestroyMutex(server->mutex);
+    free(server->serial);
+    sc_cond_destroy(&server->process_terminated_cond);
+    sc_mutex_destroy(&server->mutex);
 }

app/src/server.h

@@ -6,33 +6,34 @@
 #include <stdatomic.h>
 #include <stdbool.h>
 #include <stdint.h>
-#include <SDL2/SDL_thread.h>
 
 #include "adb.h"
+#include "coords.h"
 #include "scrcpy.h"
 #include "util/log.h"
 #include "util/net.h"
+#include "util/thread.h"
 
 struct server {
     char *serial;
     process_t process;
-    SDL_Thread *wait_server_thread;
+    sc_thread wait_server_thread;
     atomic_flag server_socket_closed;
 
-    SDL_mutex *mutex;
-    SDL_cond *process_terminated_cond;
+    sc_mutex mutex;
+    sc_cond process_terminated_cond;
     bool process_terminated;
 
     socket_t server_socket; // only used if !tunnel_forward
     socket_t video_socket;
     socket_t control_socket;
-    struct sc_port_range port_range;
     uint16_t local_port; // selected from port_range
     bool tunnel_enabled;
     bool tunnel_forward; // use "adb forward" instead of "adb reverse"
 };
 
 struct server_params {
+    const char *serial;
     enum sc_log_level log_level;
     const char *crop;
     const char *codec_options;
@@ -47,6 +48,7 @@ struct server_params {
     bool show_touches;
     bool stay_awake;
     bool force_adb_forward;
+    bool power_off_on_close;
 };
 
 // init default values
@@ -55,12 +57,13 @@ server_init(struct server *server);
 
 // push, enable tunnel et start the server
 bool
-server_start(struct server *server, const char *serial,
-             const struct server_params *params);
+server_start(struct server *server, const struct server_params *params);
 
+#define DEVICE_NAME_FIELD_LENGTH 64
 // block until the communication with the server is established
+// device_name must point to a buffer of at least DEVICE_NAME_FIELD_LENGTH bytes
 bool
-server_connect_to(struct server *server);
+server_connect_to(struct server *server, char *device_name, struct size *size);
 
 // disconnect and kill the server process
 void

app/src/stream.c

@@ -3,9 +3,6 @@
 #include <assert.h>
 #include <libavformat/avformat.h>
 #include <libavutil/time.h>
-#include <SDL2/SDL_events.h>
-#include <SDL2/SDL_mutex.h>
-#include <SDL2/SDL_thread.h>
 #include <unistd.h>
 
 #include "decoder.h"
@@ -60,33 +57,12 @@ stream_recv_packet(struct stream *stream, AVPacket *packet) {
     return true;
 }
 
-static void
-notify_stopped(void) {
-    SDL_Event stop_event;
-    stop_event.type = EVENT_STREAM_STOPPED;
-    SDL_PushEvent(&stop_event);
-}
-
 static bool
-process_config_packet(struct stream *stream, AVPacket *packet) {
-    if (stream->recorder && !recorder_push(stream->recorder, packet)) {
-        LOGE("Could not send config packet to recorder");
-        return false;
-    }
-    return true;
-}
-
-static bool
-process_frame(struct stream *stream, AVPacket *packet) {
-    if (stream->decoder && !decoder_push(stream->decoder, packet)) {
-        return false;
-    }
-
-    if (stream->recorder) {
-        packet->dts = packet->pts;
-
-        if (!recorder_push(stream->recorder, packet)) {
-            LOGE("Could not send packet to recorder");
+push_packet_to_sinks(struct stream *stream, const AVPacket *packet) {
+    for (unsigned i = 0; i < stream->sink_count; ++i) {
+        struct sc_packet_sink *sink = stream->sinks[i];
+        if (!sink->ops->push(sink, packet)) {
+            LOGE("Could not send config packet to sink %d", i);
             return false;
         }
     }
@@ -113,9 +89,11 @@ stream_parse(struct stream *stream, AVPacket *packet) {
         packet->flags |= AV_PKT_FLAG_KEY;
     }
 
-    bool ok = process_frame(stream, packet);
+    packet->dts = packet->pts;
+
+    bool ok = push_packet_to_sinks(stream, packet);
     if (!ok) {
-        LOGE("Could not process frame");
+        LOGE("Could not process packet");
         return false;
     }
 
@@ -126,39 +104,44 @@ static bool
 stream_push_packet(struct stream *stream, AVPacket *packet) {
     bool is_config = packet->pts == AV_NOPTS_VALUE;
 
-    // A config packet must not be decoded immetiately (it contains no
+    // A config packet must not be decoded immediately (it contains no
     // frame); instead, it must be concatenated with the future data packet.
-    if (stream->has_pending || is_config) {
+    if (stream->pending || is_config) {
         size_t offset;
-        if (stream->has_pending) {
-            offset = stream->pending.size;
-            if (av_grow_packet(&stream->pending, packet->size)) {
+        if (stream->pending) {
+            offset = stream->pending->size;
+            if (av_grow_packet(stream->pending, packet->size)) {
                 LOGE("Could not grow packet");
                 return false;
             }
         } else {
             offset = 0;
-            if (av_new_packet(&stream->pending, packet->size)) {
-                LOGE("Could not create packet");
+            stream->pending = av_packet_alloc();
+            if (!stream->pending) {
+                LOGE("Could not allocate packet");
+                return false;
+            }
+            if (av_new_packet(stream->pending, packet->size)) {
+                LOGE("Could not create packet");
+                av_packet_free(&stream->pending);
                 return false;
             }
-            stream->has_pending = true;
         }
 
-        memcpy(stream->pending.data + offset, packet->data, packet->size);
+        memcpy(stream->pending->data + offset, packet->data, packet->size);
 
         if (!is_config) {
             // prepare the concat packet to send to the decoder
-            stream->pending.pts = packet->pts;
-            stream->pending.dts = packet->dts;
-            stream->pending.flags = packet->flags;
-            packet = &stream->pending;
+            stream->pending->pts = packet->pts;
+            stream->pending->dts = packet->dts;
+            stream->pending->flags = packet->flags;
+            packet = stream->pending;
         }
     }
 
     if (is_config) {
         // config packet
-        bool ok = process_config_packet(stream, packet);
+        bool ok = push_packet_to_sinks(stream, packet);
         if (!ok) {
             return false;
         }
@@ -166,10 +149,9 @@ stream_push_packet(struct stream *stream, AVPacket *packet) {
         // data packet
         bool ok = stream_parse(stream, packet);
 
-        if (stream->has_pending) {
+        if (stream->pending) {
             // the pending packet must be discarded (consumed or error)
-            stream->has_pending = false;
-            av_packet_unref(&stream->pending);
+            av_packet_free(&stream->pending);
         }
 
         if (!ok) {
@@ -179,6 +161,33 @@ stream_push_packet(struct stream *stream, AVPacket *packet) {
     return true;
 }
 
+static void
+stream_close_first_sinks(struct stream *stream, unsigned count) {
+    while (count) {
+        struct sc_packet_sink *sink = stream->sinks[--count];
+        sink->ops->close(sink);
+    }
+}
+
+static inline void
+stream_close_sinks(struct stream *stream) {
+    stream_close_first_sinks(stream, stream->sink_count);
+}
+
+static bool
+stream_open_sinks(struct stream *stream, const AVCodec *codec) {
+    for (unsigned i = 0; i < stream->sink_count; ++i) {
+        struct sc_packet_sink *sink = stream->sinks[i];
+        if (!sink->ops->open(sink, codec)) {
+            LOGE("Could not open packet sink %d", i);
+            stream_close_first_sinks(stream, i);
+            return false;
+        }
+    }
+
+    return true;
+}
+
 static int
 run_stream(void *data) {
     struct stream *stream = data;
@@ -195,43 +204,36 @@ run_stream(void *data) {
         goto end;
     }
 
-    if (stream->decoder && !decoder_open(stream->decoder, codec)) {
-        LOGE("Could not open decoder");
+    if (!stream_open_sinks(stream, codec)) {
+        LOGE("Could not open stream sinks");
         goto finally_free_codec_ctx;
     }
 
-    if (stream->recorder) {
-        if (!recorder_open(stream->recorder, codec)) {
-            LOGE("Could not open recorder");
-            goto finally_close_decoder;
-        }
-
-        if (!recorder_start(stream->recorder)) {
-            LOGE("Could not start recorder");
-            goto finally_close_recorder;
-        }
-    }
-
     stream->parser = av_parser_init(AV_CODEC_ID_H264);
     if (!stream->parser) {
         LOGE("Could not initialize parser");
-        goto finally_stop_and_join_recorder;
+        goto finally_close_sinks;
     }
 
     // We must only pass complete frames to av_parser_parse2()!
     // It's more complicated, but this allows to reduce the latency by 1 frame!
     stream->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
 
+    AVPacket *packet = av_packet_alloc();
+    if (!packet) {
+        LOGE("Could not allocate packet");
+        goto finally_close_parser;
+    }
+
     for (;;) {
-        AVPacket packet;
-        bool ok = stream_recv_packet(stream, &packet);
+        bool ok = stream_recv_packet(stream, packet);
         if (!ok) {
             // end of stream
             break;
         }
 
-        ok = stream_push_packet(stream, &packet);
-        av_packet_unref(&packet);
+        ok = stream_push_packet(stream, packet);
+        av_packet_unref(packet);
         if (!ok) {
             // cannot process packet (error already logged)
             break;
@@ -240,61 +242,57 @@ run_stream(void *data) {
 
     LOGD("End of frames");
 
-    if (stream->has_pending) {
-        av_packet_unref(&stream->pending);
+    if (stream->pending) {
+        av_packet_free(&stream->pending);
     }
 
+    av_packet_free(&packet);
+finally_close_parser:
     av_parser_close(stream->parser);
-finally_stop_and_join_recorder:
-    if (stream->recorder) {
-        recorder_stop(stream->recorder);
-        LOGI("Finishing recording...");
-        recorder_join(stream->recorder);
-    }
-finally_close_recorder:
-    if (stream->recorder) {
-        recorder_close(stream->recorder);
-    }
-finally_close_decoder:
-    if (stream->decoder) {
-        decoder_close(stream->decoder);
-    }
+finally_close_sinks:
+    stream_close_sinks(stream);
 finally_free_codec_ctx:
     avcodec_free_context(&stream->codec_ctx);
 end:
-    notify_stopped();
+    stream->cbs->on_eos(stream, stream->cbs_userdata);
+
     return 0;
 }
 
 void
 stream_init(struct stream *stream, socket_t socket,
-            struct decoder *decoder, struct recorder *recorder) {
+            const struct stream_callbacks *cbs, void *cbs_userdata) {
     stream->socket = socket;
-    stream->decoder = decoder,
-    stream->recorder = recorder;
-    stream->has_pending = false;
+    stream->pending = NULL;
+    stream->sink_count = 0;
+
+    assert(cbs && cbs->on_eos);
+
+    stream->cbs = cbs;
+    stream->cbs_userdata = cbs_userdata;
+}
+
+void
+stream_add_sink(struct stream *stream, struct sc_packet_sink *sink) {
+    assert(stream->sink_count < STREAM_MAX_SINKS);
+    assert(sink);
+    assert(sink->ops);
+    stream->sinks[stream->sink_count++] = sink;
 }
 
 bool
 stream_start(struct stream *stream) {
     LOGD("Starting stream thread");
 
-    stream->thread = SDL_CreateThread(run_stream, "stream", stream);
-    if (!stream->thread) {
+    bool ok = sc_thread_create(&stream->thread, run_stream, "stream", stream);
+    if (!ok) {
         LOGC("Could not start stream thread");
         return false;
     }
     return true;
 }
 
-void
-stream_stop(struct stream *stream) {
-    if (stream->decoder) {
-        decoder_interrupt(stream->decoder);
-    }
-}
-
 void
 stream_join(struct stream *stream) {
-    SDL_WaitThread(stream->thread, NULL);
+    sc_thread_join(&stream->thread, NULL);
 }

app/src/stream.h

@@ -6,36 +6,44 @@
 #include <stdbool.h>
 #include <stdint.h>
 #include <libavformat/avformat.h>
-#include <SDL2/SDL_atomic.h>
-#include <SDL2/SDL_thread.h>
 
+#include "trait/packet_sink.h"
 #include "util/net.h"
+#include "util/thread.h"
 
-struct video_buffer;
+#define STREAM_MAX_SINKS 2
 
 struct stream {
     socket_t socket;
-    SDL_Thread *thread;
-    struct decoder *decoder;
-    struct recorder *recorder;
+    sc_thread thread;
+
+    struct sc_packet_sink *sinks[STREAM_MAX_SINKS];
+    unsigned sink_count;
+
     AVCodecContext *codec_ctx;
     AVCodecParserContext *parser;
     // successive packets may need to be concatenated, until a non-config
     // packet is available
-    bool has_pending;
-    AVPacket pending;
+    AVPacket *pending;
+
+    const struct stream_callbacks *cbs;
+    void *cbs_userdata;
+};
+
+struct stream_callbacks {
+    void (*on_eos)(struct stream *stream, void *userdata);
 };
 
 void
 stream_init(struct stream *stream, socket_t socket,
-            struct decoder *decoder, struct recorder *recorder);
+            const struct stream_callbacks *cbs, void *cbs_userdata);
+
+void
+stream_add_sink(struct stream *stream, struct sc_packet_sink *sink);
 
 bool
 stream_start(struct stream *stream);
 
-void
-stream_stop(struct stream *stream);
-
 void
 stream_join(struct stream *stream);
 

app/src/sys/unix/process.c

@@ -156,7 +156,7 @@ get_executable_path(void) {
         return NULL;
     }
     buf[len] = '\0';
-    return SDL_strdup(buf);
+    return strdup(buf);
 #else
     // in practice, we only need this feature for portable builds, only used on
     // Windows, so we don't care implementing it for every platform

app/src/sys/win/process.c

@@ -6,7 +6,9 @@
 #include "util/log.h"
 #include "util/str_util.h"
 
-static int
+#define CMD_MAX_LEN 8192
+
+static bool
 build_cmd(char *cmd, size_t len, const char *const argv[]) {
     // Windows command-line parsing is WTF:
     // <http://daviddeley.com/autohotkey/parameters/parameters.htm#WINPASS>
@@ -15,9 +17,9 @@ build_cmd(char *cmd, size_t len, const char *const argv[]) {
     size_t ret = xstrjoin(cmd, argv, ' ', len);
     if (ret >= len) {
         LOGE("Command too long (%" PRIsizet " chars)", len - 1);
-        return -1;
+        return false;
     }
-    return 0;
+    return true;
 }
 
 enum process_result
@@ -27,13 +29,14 @@ process_execute(const char *const argv[], HANDLE *handle) {
     memset(&si, 0, sizeof(si));
     si.cb = sizeof(si);
 
-    char cmd[256];
-    if (build_cmd(cmd, sizeof(cmd), argv)) {
+    char *cmd = malloc(CMD_MAX_LEN);
+    if (!cmd || !build_cmd(cmd, CMD_MAX_LEN, argv)) {
         *handle = NULL;
         return PROCESS_ERROR_GENERIC;
     }
 
     wchar_t *wide = utf8_to_wide_char(cmd);
+    free(cmd);
     if (!wide) {
         LOGC("Could not allocate wide char string");
         return PROCESS_ERROR_GENERIC;
@@ -41,7 +44,7 @@ process_execute(const char *const argv[], HANDLE *handle) {
 
     if (!CreateProcessW(NULL, wide, NULL, NULL, FALSE, 0, NULL, NULL, &si,
                         &pi)) {
-        SDL_free(wide);
+        free(wide);
         *handle = NULL;
         if (GetLastError() == ERROR_FILE_NOT_FOUND) {
             return PROCESS_ERROR_MISSING_BINARY;
@@ -49,7 +52,7 @@ process_execute(const char *const argv[], HANDLE *handle) {
         return PROCESS_ERROR_GENERIC;
     }
 
-    SDL_free(wide);
+    free(wide);
     *handle = pi.hProcess;
     return PROCESS_SUCCESS;
 }
@@ -105,7 +108,7 @@ is_regular_file(const char *path) {
 
     struct _stat path_stat;
     int r = _wstat(wide_path, &path_stat);
-    SDL_free(wide_path);
+    free(wide_path);
 
     if (r) {
         perror("stat");

app/src/trait/frame_sink.h

@@ -0,0 +1,26 @@
+#ifndef SC_FRAME_SINK
+#define SC_FRAME_SINK
+
+#include "common.h"
+
+#include <assert.h>
+#include <stdbool.h>
+
+typedef struct AVFrame AVFrame;
+
+/**
+ * Frame sink trait.
+ *
+ * Component able to receive AVFrames should implement this trait.
+ */
+struct sc_frame_sink {
+    const struct sc_frame_sink_ops *ops;
+};
+
+struct sc_frame_sink_ops {
+    bool (*open)(struct sc_frame_sink *sink);
+    void (*close)(struct sc_frame_sink *sink);
+    bool (*push)(struct sc_frame_sink *sink, const AVFrame *frame);
+};
+
+#endif

app/src/trait/packet_sink.h

@@ -0,0 +1,27 @@
+#ifndef SC_PACKET_SINK
+#define SC_PACKET_SINK
+
+#include "common.h"
+
+#include <assert.h>
+#include <stdbool.h>
+
+typedef struct AVCodec AVCodec;
+typedef struct AVPacket AVPacket;
+
+/**
+ * Packet sink trait.
+ *
+ * Component able to receive AVPackets should implement this trait.
+ */
+struct sc_packet_sink {
+    const struct sc_packet_sink_ops *ops;
+};
+
+struct sc_packet_sink_ops {
+    bool (*open)(struct sc_packet_sink *sink, const AVCodec *codec);
+    void (*close)(struct sc_packet_sink *sink);
+    bool (*push)(struct sc_packet_sink *sink, const AVPacket *packet);
+};
+
+#endif

app/src/util/lock.h

@@ -1,75 +0,0 @@
-#ifndef LOCK_H
-#define LOCK_H
-
-#include "common.h"
-
-#include <stdint.h>
-#include <SDL2/SDL_mutex.h>
-
-#include "log.h"
-
-static inline void
-mutex_lock(SDL_mutex *mutex) {
-    int r = SDL_LockMutex(mutex);
-#ifndef NDEBUG
-    if (r) {
-        LOGC("Could not lock mutex: %s", SDL_GetError());
-        abort();
-    }
-#else
-    (void) r;
-#endif
-}
-
-static inline void
-mutex_unlock(SDL_mutex *mutex) {
-    int r = SDL_UnlockMutex(mutex);
-#ifndef NDEBUG
-    if (r) {
-        LOGC("Could not unlock mutex: %s", SDL_GetError());
-        abort();
-    }
-#else
-    (void) r;
-#endif
-}
-
-static inline void
-cond_wait(SDL_cond *cond, SDL_mutex *mutex) {
-    int r = SDL_CondWait(cond, mutex);
-#ifndef NDEBUG
-    if (r) {
-        LOGC("Could not wait on condition: %s", SDL_GetError());
-        abort();
-    }
-#else
-    (void) r;
-#endif
-}
-
-static inline int
-cond_wait_timeout(SDL_cond *cond, SDL_mutex *mutex, uint32_t ms) {
-    int r = SDL_CondWaitTimeout(cond, mutex, ms);
-#ifndef NDEBUG
-    if (r < 0) {
-        LOGC("Could not wait on condition with timeout: %s", SDL_GetError());
-        abort();
-    }
-#endif
-    return r;
-}
-
-static inline void
-cond_signal(SDL_cond *cond) {
-    int r = SDL_CondSignal(cond);
-#ifndef NDEBUG
-    if (r) {
-        LOGC("Could not signal a condition: %s", SDL_GetError());
-        abort();
-    }
-#else
-    (void) r;
-#endif
-}
-
-#endif

app/src/util/log.c

@@ -0,0 +1,53 @@
+#include "log.h"
+
+#include <assert.h>
+
+static SDL_LogPriority
+log_level_sc_to_sdl(enum sc_log_level level) {
+    switch (level) {
+        case SC_LOG_LEVEL_VERBOSE:
+            return SDL_LOG_PRIORITY_VERBOSE;
+        case SC_LOG_LEVEL_DEBUG:
+            return SDL_LOG_PRIORITY_DEBUG;
+        case SC_LOG_LEVEL_INFO:
+            return SDL_LOG_PRIORITY_INFO;
+        case SC_LOG_LEVEL_WARN:
+            return SDL_LOG_PRIORITY_WARN;
+        case SC_LOG_LEVEL_ERROR:
+            return SDL_LOG_PRIORITY_ERROR;
+        default:
+            assert(!"unexpected log level");
+            return SDL_LOG_PRIORITY_INFO;
+    }
+}
+
+static enum sc_log_level
+log_level_sdl_to_sc(SDL_LogPriority priority) {
+    switch (priority) {
+        case SDL_LOG_PRIORITY_VERBOSE:
+            return SC_LOG_LEVEL_VERBOSE;
+        case SDL_LOG_PRIORITY_DEBUG:
+            return SC_LOG_LEVEL_DEBUG;
+        case SDL_LOG_PRIORITY_INFO:
+            return SC_LOG_LEVEL_INFO;
+        case SDL_LOG_PRIORITY_WARN:
+            return SC_LOG_LEVEL_WARN;
+        case SDL_LOG_PRIORITY_ERROR:
+            return SC_LOG_LEVEL_ERROR;
+        default:
+            assert(!"unexpected log level");
+            return SC_LOG_LEVEL_INFO;
+    }
+}
+
+void
+sc_set_log_level(enum sc_log_level level) {
+    SDL_LogPriority sdl_log = log_level_sc_to_sdl(level);
+    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, sdl_log);
+}
+
+enum sc_log_level
+sc_get_log_level(void) {
+    SDL_LogPriority sdl_log = SDL_LogGetPriority(SDL_LOG_CATEGORY_APPLICATION);
+    return log_level_sdl_to_sc(sdl_log);
+}

app/src/util/log.h

@@ -1,8 +1,12 @@
-#ifndef LOG_H
-#define LOG_H
+#ifndef SC_LOG_H
+#define SC_LOG_H
+
+#include "common.h"
 
 #include <SDL2/SDL_log.h>
 
+#include "scrcpy.h"
+
 #define LOGV(...) SDL_LogVerbose(SDL_LOG_CATEGORY_APPLICATION, __VA_ARGS__)
 #define LOGD(...) SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, __VA_ARGS__)
 #define LOGI(...) SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, __VA_ARGS__)
@@ -10,4 +14,10 @@
 #define LOGE(...) SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, __VA_ARGS__)
 #define LOGC(...) SDL_LogCritical(SDL_LOG_CATEGORY_APPLICATION, __VA_ARGS__)
 
+void
+sc_set_log_level(enum sc_log_level level);
+
+enum sc_log_level
+sc_get_log_level(void);
+
 #endif

app/src/util/process.h

@@ -70,7 +70,7 @@ search_executable(const char *file);
 #endif
 
 // return the absolute path of the executable (the scrcpy binary)
-// may be NULL on error; to be freed by SDL_free
+// may be NULL on error; to be freed by free()
 char *
 get_executable_path(void);
 

app/src/util/queue.h

@@ -1,6 +1,6 @@
 // generic intrusive FIFO queue
-#ifndef QUEUE_H
-#define QUEUE_H
+#ifndef SC_QUEUE_H
+#define SC_QUEUE_H
 
 #include "common.h"
 
@@ -10,15 +10,15 @@
 
 // To define a queue type of "struct foo":
 //    struct queue_foo QUEUE(struct foo);
-#define QUEUE(TYPE) { \
+#define SC_QUEUE(TYPE) { \
     TYPE *first; \
     TYPE *last; \
 }
 
-#define queue_init(PQ) \
+#define sc_queue_init(PQ) \
     (void) ((PQ)->first = (PQ)->last = NULL)
 
-#define queue_is_empty(PQ) \
+#define sc_queue_is_empty(PQ) \
     !(PQ)->first
 
 // NEXTFIELD is the field in the ITEM type used for intrusive linked-list
@@ -30,30 +30,30 @@
 //    };
 //
 //    // define the type "struct my_queue"
-//    struct my_queue QUEUE(struct foo);
+//    struct my_queue SC_QUEUE(struct foo);
 //
 //    struct my_queue queue;
-//    queue_init(&queue);
+//    sc_queue_init(&queue);
 //
 //    struct foo v1 = { .value = 42 };
 //    struct foo v2 = { .value = 27 };
 //
-//    queue_push(&queue, next, v1);
-//    queue_push(&queue, next, v2);
+//    sc_queue_push(&queue, next, v1);
+//    sc_queue_push(&queue, next, v2);
 //
 //    struct foo *foo;
-//    queue_take(&queue, next, &foo);
+//    sc_queue_take(&queue, next, &foo);
 //    assert(foo->value == 42);
-//    queue_take(&queue, next, &foo);
+//    sc_queue_take(&queue, next, &foo);
 //    assert(foo->value == 27);
-//    assert(queue_is_empty(&queue));
+//    assert(sc_queue_is_empty(&queue));
 //
 
 // push a new item into the queue
-#define queue_push(PQ, NEXTFIELD, ITEM) \
+#define sc_queue_push(PQ, NEXTFIELD, ITEM) \
     (void) ({ \
         (ITEM)->NEXTFIELD = NULL; \
-        if (queue_is_empty(PQ)) { \
+        if (sc_queue_is_empty(PQ)) { \
             (PQ)->first = (PQ)->last = (ITEM); \
         } else { \
             (PQ)->last->NEXTFIELD = (ITEM); \
@@ -65,9 +65,9 @@
 // the result is stored in *(PITEM)
 // (without typeof(), we could not store a local variable having the correct
 // type so that we can "return" it)
-#define queue_take(PQ, NEXTFIELD, PITEM) \
+#define sc_queue_take(PQ, NEXTFIELD, PITEM) \
     (void) ({ \
-        assert(!queue_is_empty(PQ)); \
+        assert(!sc_queue_is_empty(PQ)); \
         *(PITEM) = (PQ)->first; \
         (PQ)->first = (PQ)->first->NEXTFIELD; \
     })

app/src/util/str_util.c

@@ -10,8 +10,6 @@
 # include <tchar.h>
 #endif
 
-#include <SDL2/SDL_stdinc.h>
-
 size_t
 xstrncpy(char *dest, const char *src, size_t n) {
     size_t i;
@@ -49,7 +47,7 @@ truncated:
 char *
 strquote(const char *src) {
     size_t len = strlen(src);
-    char *quoted = SDL_malloc(len + 3);
+    char *quoted = malloc(len + 3);
     if (!quoted) {
         return NULL;
     }
@@ -142,6 +140,24 @@ parse_integer_with_suffix(const char *s, long *out) {
     return true;
 }
 
+bool
+strlist_contains(const char *list, char sep, const char *s) {
+    char *p;
+    do {
+        p = strchr(list, sep);
+
+        size_t token_len = p ? (size_t) (p - list) : strlen(list);
+        if (!strncmp(list, s, token_len)) {
+            return true;
+        }
+
+        if (p) {
+            list = p + 1;
+        }
+    } while (p);
+    return false;
+}
+
 size_t
 utf8_truncation_index(const char *utf8, size_t max_len) {
     size_t len = strlen(utf8);
@@ -167,7 +183,7 @@ utf8_to_wide_char(const char *utf8) {
         return NULL;
     }
 
-    wchar_t *wide = SDL_malloc(len * sizeof(wchar_t));
+    wchar_t *wide = malloc(len * sizeof(wchar_t));
     if (!wide) {
         return NULL;
     }
@@ -183,7 +199,7 @@ utf8_from_wide_char(const wchar_t *ws) {
         return NULL;
     }
 
-    char *utf8 = SDL_malloc(len);
+    char *utf8 = malloc(len);
     if (!utf8) {
         return NULL;
     }

app/src/util/str_util.h

@@ -16,7 +16,7 @@ size_t
 xstrncpy(char *dest, const char *src, size_t n);
 
 // join tokens by sep into dst
-// returns the number of chars actually written (max n-1) if no trucation
+// returns the number of chars actually written (max n-1) if no truncation
 // occurred, or n if truncated
 size_t
 xstrjoin(char *dst, const char *const tokens[], char sep, size_t n);
@@ -43,6 +43,11 @@ parse_integers(const char *s, const char sep, size_t max_items, long *out);
 bool
 parse_integer_with_suffix(const char *s, long *out);
 
+// search s in the list separated by sep
+// for example, strlist_contains("a,bc,def", ',', "bc") returns true
+bool
+strlist_contains(const char *list, char sep, const char *s);
+
 // return the index to truncate a UTF-8 string at a valid position
 size_t
 utf8_truncation_index(const char *utf8, size_t max_len);

app/src/util/thread.c

@@ -0,0 +1,171 @@
+#include "thread.h"
+
+#include <assert.h>
+#include <SDL2/SDL_thread.h>
+
+#include "log.h"
+
+bool
+sc_thread_create(sc_thread *thread, sc_thread_fn fn, const char *name,
+                 void *userdata) {
+    SDL_Thread *sdl_thread = SDL_CreateThread(fn, name, userdata);
+    if (!sdl_thread) {
+        return false;
+    }
+
+    thread->thread = sdl_thread;
+    return true;
+}
+
+void
+sc_thread_join(sc_thread *thread, int *status) {
+    SDL_WaitThread(thread->thread, status);
+}
+
+bool
+sc_mutex_init(sc_mutex *mutex) {
+    SDL_mutex *sdl_mutex = SDL_CreateMutex();
+    if (!sdl_mutex) {
+        return false;
+    }
+
+    mutex->mutex = sdl_mutex;
+#ifndef NDEBUG
+    atomic_init(&mutex->locker, 0);
+#endif
+    return true;
+}
+
+void
+sc_mutex_destroy(sc_mutex *mutex) {
+    SDL_DestroyMutex(mutex->mutex);
+}
+
+void
+sc_mutex_lock(sc_mutex *mutex) {
+    // SDL mutexes are recursive, but we don't want to use recursive mutexes
+    assert(!sc_mutex_held(mutex));
+    int r = SDL_LockMutex(mutex->mutex);
+#ifndef NDEBUG
+    if (r) {
+        LOGC("Could not lock mutex: %s", SDL_GetError());
+        abort();
+    }
+
+    atomic_store_explicit(&mutex->locker, sc_thread_get_id(),
+                          memory_order_relaxed);
+#else
+    (void) r;
+#endif
+}
+
+void
+sc_mutex_unlock(sc_mutex *mutex) {
+#ifndef NDEBUG
+    assert(sc_mutex_held(mutex));
+    atomic_store_explicit(&mutex->locker, 0, memory_order_relaxed);
+#endif
+    int r = SDL_UnlockMutex(mutex->mutex);
+#ifndef NDEBUG
+    if (r) {
+        LOGC("Could not lock mutex: %s", SDL_GetError());
+        abort();
+    }
+#else
+    (void) r;
+#endif
+}
+
+sc_thread_id
+sc_thread_get_id(void) {
+    return SDL_ThreadID();
+}
+
+#ifndef NDEBUG
+bool
+sc_mutex_held(struct sc_mutex *mutex) {
+    sc_thread_id locker_id =
+        atomic_load_explicit(&mutex->locker, memory_order_relaxed);
+    return locker_id == sc_thread_get_id();
+}
+#endif
+
+bool
+sc_cond_init(sc_cond *cond) {
+    SDL_cond *sdl_cond = SDL_CreateCond();
+    if (!sdl_cond) {
+        return false;
+    }
+
+    cond->cond = sdl_cond;
+    return true;
+}
+
+void
+sc_cond_destroy(sc_cond *cond) {
+    SDL_DestroyCond(cond->cond);
+}
+
+void
+sc_cond_wait(sc_cond *cond, sc_mutex *mutex) {
+    int r = SDL_CondWait(cond->cond, mutex->mutex);
+#ifndef NDEBUG
+    if (r) {
+        LOGC("Could not wait on condition: %s", SDL_GetError());
+        abort();
+    }
+
+    atomic_store_explicit(&mutex->locker, sc_thread_get_id(),
+                          memory_order_relaxed);
+#else
+    (void) r;
+#endif
+}
+
+bool
+sc_cond_timedwait(sc_cond *cond, sc_mutex *mutex, sc_tick deadline) {
+    sc_tick now = sc_tick_now();
+    if (deadline <= now) {
+        return false; // timeout
+    }
+
+    uint32_t ms = SC_TICK_TO_MS(deadline - now);
+    int r = SDL_CondWaitTimeout(cond->cond, mutex->mutex, ms);
+#ifndef NDEBUG
+    if (r < 0) {
+        LOGC("Could not wait on condition with timeout: %s", SDL_GetError());
+        abort();
+    }
+
+    atomic_store_explicit(&mutex->locker, sc_thread_get_id(),
+                          memory_order_relaxed);
+#endif
+    assert(r == 0 || r == SDL_MUTEX_TIMEDOUT);
+    return r == 0;
+}
+
+void
+sc_cond_signal(sc_cond *cond) {
+    int r = SDL_CondSignal(cond->cond);
+#ifndef NDEBUG
+    if (r) {
+        LOGC("Could not signal a condition: %s", SDL_GetError());
+        abort();
+    }
+#else
+    (void) r;
+#endif
+}
+
+void
+sc_cond_broadcast(sc_cond *cond) {
+    int r = SDL_CondBroadcast(cond->cond);
+#ifndef NDEBUG
+    if (r) {
+        LOGC("Could not broadcast a condition: %s", SDL_GetError());
+        abort();
+    }
+#else
+    (void) r;
+#endif
+}

app/src/util/thread.h

@@ -0,0 +1,84 @@
+#ifndef SC_THREAD_H
+#define SC_THREAD_H
+
+#include "common.h"
+
+#include <stdatomic.h>
+#include <stdbool.h>
+
+#include "tick.h"
+
+/* Forward declarations */
+typedef struct SDL_Thread SDL_Thread;
+typedef struct SDL_mutex SDL_mutex;
+typedef struct SDL_cond SDL_cond;
+
+typedef int sc_thread_fn(void *);
+typedef unsigned sc_thread_id;
+typedef atomic_uint sc_atomic_thread_id;
+
+typedef struct sc_thread {
+    SDL_Thread *thread;
+} sc_thread;
+
+typedef struct sc_mutex {
+    SDL_mutex *mutex;
+#ifndef NDEBUG
+    sc_atomic_thread_id locker;
+#endif
+} sc_mutex;
+
+typedef struct sc_cond {
+    SDL_cond *cond;
+} sc_cond;
+
+bool
+sc_thread_create(sc_thread *thread, sc_thread_fn fn, const char *name,
+                 void *userdata);
+
+void
+sc_thread_join(sc_thread *thread, int *status);
+
+bool
+sc_mutex_init(sc_mutex *mutex);
+
+void
+sc_mutex_destroy(sc_mutex *mutex);
+
+void
+sc_mutex_lock(sc_mutex *mutex);
+
+void
+sc_mutex_unlock(sc_mutex *mutex);
+
+sc_thread_id
+sc_thread_get_id(void);
+
+#ifndef NDEBUG
+bool
+sc_mutex_held(struct sc_mutex *mutex);
+# define sc_mutex_assert(mutex) assert(sc_mutex_held(mutex))
+#else
+# define sc_mutex_assert(mutex)
+#endif
+
+bool
+sc_cond_init(sc_cond *cond);
+
+void
+sc_cond_destroy(sc_cond *cond);
+
+void
+sc_cond_wait(sc_cond *cond, sc_mutex *mutex);
+
+// return true on signaled, false on timeout
+bool
+sc_cond_timedwait(sc_cond *cond, sc_mutex *mutex, sc_tick deadline);
+
+void
+sc_cond_signal(sc_cond *cond);
+
+void
+sc_cond_broadcast(sc_cond *cond);
+
+#endif

app/src/util/tick.c

@@ -0,0 +1,16 @@
+#include "tick.h"
+
+#include <SDL2/SDL_timer.h>
+
+sc_tick
+sc_tick_now(void) {
+    // SDL_GetTicks() resolution is in milliseconds, but sc_tick are expressed
+    // in microseconds to avoid loosing precision on PTS.
+    //
+    // SDL_GetPerformanceCounter()/SDL_GetPerformanceFrequency() could be used,
+    // but:
+    //  - the conversions (to avoid overflow) are not zero-cost, since the
+    //    frequency is not known at compile time;
+    //  - in practice, we don't need more precision for now.
+    return (sc_tick) SDL_GetTicks() * 1000;
+}

app/src/util/tick.h

@@ -0,0 +1,21 @@
+#ifndef SC_TICK_H
+#define SC_TICK_H
+
+#include <stdint.h>
+
+typedef int64_t sc_tick;
+#define PRItick PRIi64
+#define SC_TICK_FREQ 1000000 // microsecond
+
+// To be adapted if SC_TICK_FREQ changes
+#define SC_TICK_TO_US(tick) (tick)
+#define SC_TICK_TO_MS(tick) ((tick) / 1000)
+#define SC_TICK_TO_SEC(tick) ((tick) / 1000000)
+#define SC_TICK_FROM_US(us) (us)
+#define SC_TICK_FROM_MS(ms) ((ms) * 1000)
+#define SC_TICK_FROM_SEC(sec) ((sec) * 1000000)
+
+sc_tick
+sc_tick_now(void);
+
+#endif

app/src/v4l2_sink.c

@@ -0,0 +1,383 @@
+#include "v4l2_sink.h"
+
+#include "util/log.h"
+#include "util/str_util.h"
+
+/** Downcast frame_sink to sc_v4l2_sink */
+#define DOWNCAST(SINK) container_of(SINK, struct sc_v4l2_sink, frame_sink)
+
+static const AVRational SCRCPY_TIME_BASE = {1, 1000000}; // timestamps in us
+
+static const AVOutputFormat *
+find_muxer(const char *name) {
+#ifdef SCRCPY_LAVF_HAS_NEW_MUXER_ITERATOR_API
+    void *opaque = NULL;
+#endif
+    const AVOutputFormat *oformat = NULL;
+    do {
+#ifdef SCRCPY_LAVF_HAS_NEW_MUXER_ITERATOR_API
+        oformat = av_muxer_iterate(&opaque);
+#else
+        oformat = av_oformat_next(oformat);
+#endif
+        // until null or containing the requested name
+    } while (oformat && !strlist_contains(oformat->name, ',', name));
+    return oformat;
+}
+
+static bool
+write_header(struct sc_v4l2_sink *vs, const AVPacket *packet) {
+    AVStream *ostream = vs->format_ctx->streams[0];
+
+    uint8_t *extradata = av_malloc(packet->size * sizeof(uint8_t));
+    if (!extradata) {
+        LOGC("Could not allocate extradata");
+        return false;
+    }
+
+    // copy the first packet to the extra data
+    memcpy(extradata, packet->data, packet->size);
+
+    ostream->codecpar->extradata = extradata;
+    ostream->codecpar->extradata_size = packet->size;
+
+    int ret = avformat_write_header(vs->format_ctx, NULL);
+    if (ret < 0) {
+        LOGE("Failed to write header to %s", vs->device_name);
+        return false;
+    }
+
+    return true;
+}
+
+static void
+rescale_packet(struct sc_v4l2_sink *vs, AVPacket *packet) {
+    AVStream *ostream = vs->format_ctx->streams[0];
+    av_packet_rescale_ts(packet, SCRCPY_TIME_BASE, ostream->time_base);
+}
+
+static bool
+write_packet(struct sc_v4l2_sink *vs, AVPacket *packet) {
+    if (!vs->header_written) {
+        bool ok = write_header(vs, packet);
+        if (!ok) {
+            return false;
+        }
+        vs->header_written = true;
+        return true;
+    }
+
+    rescale_packet(vs, packet);
+
+    bool ok = av_write_frame(vs->format_ctx, packet) >= 0;
+
+    // Failing to write the last frame is not very serious, no future frame may
+    // depend on it, so the resulting file will still be valid
+    (void) ok;
+
+    return true;
+}
+
+static bool
+encode_and_write_frame(struct sc_v4l2_sink *vs, const AVFrame *frame) {
+    int ret = avcodec_send_frame(vs->encoder_ctx, frame);
+    if (ret < 0 && ret != AVERROR(EAGAIN)) {
+        LOGE("Could not send v4l2 video frame: %d", ret);
+        return false;
+    }
+
+    AVPacket *packet = vs->packet;
+    ret = avcodec_receive_packet(vs->encoder_ctx, packet);
+    if (ret == 0) {
+        // A packet was received
+
+        bool ok = write_packet(vs, packet);
+        av_packet_unref(packet);
+        if (!ok) {
+            LOGW("Could not send packet to v4l2 sink");
+            return false;
+        }
+    } else if (ret != AVERROR(EAGAIN)) {
+        LOGE("Could not receive v4l2 video packet: %d", ret);
+        return false;
+    }
+
+    return true;
+}
+
+static int
+run_v4l2_sink(void *data) {
+    struct sc_v4l2_sink *vs = data;
+
+    for (;;) {
+        sc_mutex_lock(&vs->mutex);
+
+        while (!vs->stopped && !vs->has_frame) {
+            sc_cond_wait(&vs->cond, &vs->mutex);
+        }
+
+        if (vs->stopped) {
+            sc_mutex_unlock(&vs->mutex);
+            break;
+        }
+
+        vs->has_frame = false;
+        sc_mutex_unlock(&vs->mutex);
+
+        sc_video_buffer_consume(&vs->vb, vs->frame);
+
+        bool ok = encode_and_write_frame(vs, vs->frame);
+        av_frame_unref(vs->frame);
+        if (!ok) {
+            LOGE("Could not send frame to v4l2 sink");
+            break;
+        }
+    }
+
+    LOGD("V4l2 thread ended");
+
+    return 0;
+}
+
+static void
+sc_video_buffer_on_new_frame(struct sc_video_buffer *vb, bool previous_skipped,
+                             void *userdata) {
+    (void) vb;
+    struct sc_v4l2_sink *vs = userdata;
+
+    if (!previous_skipped) {
+        sc_mutex_lock(&vs->mutex);
+        vs->has_frame = true;
+        sc_cond_signal(&vs->cond);
+        sc_mutex_unlock(&vs->mutex);
+    }
+}
+
+static bool
+sc_v4l2_sink_open(struct sc_v4l2_sink *vs) {
+    static const struct sc_video_buffer_callbacks cbs = {
+        .on_new_frame = sc_video_buffer_on_new_frame,
+    };
+
+    bool ok = sc_video_buffer_init(&vs->vb, vs->buffering_time, &cbs, vs);
+    if (!ok) {
+        LOGE("Could not initialize video buffer");
+        return false;
+    }
+
+    ok = sc_video_buffer_start(&vs->vb);
+    if (!ok) {
+        LOGE("Could not start video buffer");
+        goto error_video_buffer_destroy;
+    }
+
+    ok = sc_mutex_init(&vs->mutex);
+    if (!ok) {
+        LOGC("Could not create mutex");
+        goto error_video_buffer_stop_and_join;
+    }
+
+    ok = sc_cond_init(&vs->cond);
+    if (!ok) {
+        LOGC("Could not create cond");
+        goto error_mutex_destroy;
+    }
+
+    // FIXME
+    const AVOutputFormat *format = find_muxer("video4linux2,v4l2");
+    if (!format) {
+        LOGE("Could not find v4l2 muxer");
+        goto error_cond_destroy;
+    }
+
+    const AVCodec *encoder = avcodec_find_encoder(AV_CODEC_ID_RAWVIDEO);
+    if (!encoder) {
+        LOGE("Raw video encoder not found");
+        return false;
+    }
+
+    vs->format_ctx = avformat_alloc_context();
+    if (!vs->format_ctx) {
+        LOGE("Could not allocate v4l2 output context");
+        return false;
+    }
+
+    // contrary to the deprecated API (av_oformat_next()), av_muxer_iterate()
+    // returns (on purpose) a pointer-to-const, but AVFormatContext.oformat
+    // still expects a pointer-to-non-const (it has not be updated accordingly)
+    // <https://github.com/FFmpeg/FFmpeg/commit/0694d8702421e7aff1340038559c438b61bb30dd>
+    vs->format_ctx->oformat = (AVOutputFormat *) format;
+#ifdef SCRCPY_LAVF_HAS_AVFORMATCONTEXT_URL
+    vs->format_ctx->url = strdup(vs->device_name);
+    if (!vs->format_ctx->url) {
+        LOGE("Could not strdup v4l2 device name");
+        goto error_avformat_free_context;
+        return false;
+    }
+#else
+    strncpy(vs->format_ctx->filename, vs->device_name,
+            sizeof(vs->format_ctx->filename));
+#endif
+
+    AVStream *ostream = avformat_new_stream(vs->format_ctx, encoder);
+    if (!ostream) {
+        LOGE("Could not allocate new v4l2 stream");
+        goto error_avformat_free_context;
+        return false;
+    }
+
+    ostream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
+    ostream->codecpar->codec_id = encoder->id;
+    ostream->codecpar->format = AV_PIX_FMT_YUV420P;
+    ostream->codecpar->width = vs->frame_size.width;
+    ostream->codecpar->height = vs->frame_size.height;
+
+    int ret = avio_open(&vs->format_ctx->pb, vs->device_name, AVIO_FLAG_WRITE);
+    if (ret < 0) {
+        LOGE("Failed to open output device: %s", vs->device_name);
+        // ostream will be cleaned up during context cleaning
+        goto error_avformat_free_context;
+    }
+
+    vs->encoder_ctx = avcodec_alloc_context3(encoder);
+    if (!vs->encoder_ctx) {
+        LOGC("Could not allocate codec context for v4l2");
+        goto error_avio_close;
+    }
+
+    vs->encoder_ctx->width = vs->frame_size.width;
+    vs->encoder_ctx->height = vs->frame_size.height;
+    vs->encoder_ctx->pix_fmt = AV_PIX_FMT_YUV420P;
+    vs->encoder_ctx->time_base.num = 1;
+    vs->encoder_ctx->time_base.den = 1;
+
+    if (avcodec_open2(vs->encoder_ctx, encoder, NULL) < 0) {
+        LOGE("Could not open codec for v4l2");
+        goto error_avcodec_free_context;
+    }
+
+    vs->frame = av_frame_alloc();
+    if (!vs->frame) {
+        LOGE("Could not create v4l2 frame");
+        goto error_avcodec_close;
+    }
+
+    vs->packet = av_packet_alloc();
+    if (!vs->packet) {
+        LOGE("Could not allocate packet");
+        goto error_av_frame_free;
+    }
+
+    vs->has_frame = false;
+    vs->header_written = false;
+    vs->stopped = false;
+
+    LOGD("Starting v4l2 thread");
+    ok = sc_thread_create(&vs->thread, run_v4l2_sink, "v4l2", vs);
+    if (!ok) {
+        LOGC("Could not start v4l2 thread");
+        goto error_av_packet_free;
+    }
+
+    LOGI("v4l2 sink started to device: %s", vs->device_name);
+
+    return true;
+
+error_av_packet_free:
+    av_packet_free(&vs->packet);
+error_av_frame_free:
+    av_frame_free(&vs->frame);
+error_avcodec_close:
+    avcodec_close(vs->encoder_ctx);
+error_avcodec_free_context:
+    avcodec_free_context(&vs->encoder_ctx);
+error_avio_close:
+    avio_close(vs->format_ctx->pb);
+error_avformat_free_context:
+    avformat_free_context(vs->format_ctx);
+error_cond_destroy:
+    sc_cond_destroy(&vs->cond);
+error_mutex_destroy:
+    sc_mutex_destroy(&vs->mutex);
+error_video_buffer_stop_and_join:
+    sc_video_buffer_stop(&vs->vb);
+    sc_video_buffer_join(&vs->vb);
+error_video_buffer_destroy:
+    sc_video_buffer_destroy(&vs->vb);
+
+    return false;
+}
+
+static void
+sc_v4l2_sink_close(struct sc_v4l2_sink *vs) {
+    sc_mutex_lock(&vs->mutex);
+    vs->stopped = true;
+    sc_cond_signal(&vs->cond);
+    sc_mutex_unlock(&vs->mutex);
+
+    sc_video_buffer_stop(&vs->vb);
+
+    sc_thread_join(&vs->thread, NULL);
+    sc_video_buffer_join(&vs->vb);
+
+    av_packet_free(&vs->packet);
+    av_frame_free(&vs->frame);
+    avcodec_close(vs->encoder_ctx);
+    avcodec_free_context(&vs->encoder_ctx);
+    avio_close(vs->format_ctx->pb);
+    avformat_free_context(vs->format_ctx);
+    sc_cond_destroy(&vs->cond);
+    sc_mutex_destroy(&vs->mutex);
+    sc_video_buffer_destroy(&vs->vb);
+}
+
+static bool
+sc_v4l2_sink_push(struct sc_v4l2_sink *vs, const AVFrame *frame) {
+    return sc_video_buffer_push(&vs->vb, frame);
+}
+
+static bool
+sc_v4l2_frame_sink_open(struct sc_frame_sink *sink) {
+    struct sc_v4l2_sink *vs = DOWNCAST(sink);
+    return sc_v4l2_sink_open(vs);
+}
+
+static void
+sc_v4l2_frame_sink_close(struct sc_frame_sink *sink) {
+    struct sc_v4l2_sink *vs = DOWNCAST(sink);
+    sc_v4l2_sink_close(vs);
+}
+
+static bool
+sc_v4l2_frame_sink_push(struct sc_frame_sink *sink, const AVFrame *frame) {
+    struct sc_v4l2_sink *vs = DOWNCAST(sink);
+    return sc_v4l2_sink_push(vs, frame);
+}
+
+bool
+sc_v4l2_sink_init(struct sc_v4l2_sink *vs, const char *device_name,
+                  struct size frame_size, sc_tick buffering_time) {
+    vs->device_name = strdup(device_name);
+    if (!vs->device_name) {
+        LOGE("Could not strdup v4l2 device name");
+        return false;
+    }
+
+    vs->frame_size = frame_size;
+    vs->buffering_time = buffering_time;
+
+    static const struct sc_frame_sink_ops ops = {
+        .open = sc_v4l2_frame_sink_open,
+        .close = sc_v4l2_frame_sink_close,
+        .push = sc_v4l2_frame_sink_push,
+    };
+
+    vs->frame_sink.ops = &ops;
+
+    return true;
+}
+
+void
+sc_v4l2_sink_destroy(struct sc_v4l2_sink *vs) {
+    free(vs->device_name);
+}

app/src/v4l2_sink.h

@@ -0,0 +1,42 @@
+#ifndef SC_V4L2_SINK_H
+#define SC_V4L2_SINK_H
+
+#include "common.h"
+
+#include "coords.h"
+#include "trait/frame_sink.h"
+#include "video_buffer.h"
+#include "util/tick.h"
+
+#include <libavformat/avformat.h>
+
+struct sc_v4l2_sink {
+    struct sc_frame_sink frame_sink; // frame sink trait
+
+    struct sc_video_buffer vb;
+    AVFormatContext *format_ctx;
+    AVCodecContext *encoder_ctx;
+
+    char *device_name;
+    struct size frame_size;
+    sc_tick buffering_time;
+
+    sc_thread thread;
+    sc_mutex mutex;
+    sc_cond cond;
+    bool has_frame;
+    bool stopped;
+    bool header_written;
+
+    AVFrame *frame;
+    AVPacket *packet;
+};
+
+bool
+sc_v4l2_sink_init(struct sc_v4l2_sink *vs, const char *device_name,
+                  struct size frame_size, sc_tick buffering_time);
+
+void
+sc_v4l2_sink_destroy(struct sc_v4l2_sink *vs);
+
+#endif

app/src/video_buffer.c

@@ -1,112 +1,255 @@
 #include "video_buffer.h"
 
 #include <assert.h>
-#include <SDL2/SDL_mutex.h>
+#include <stdlib.h>
+
 #include <libavutil/avutil.h>
 #include <libavformat/avformat.h>
 
-#include "util/lock.h"
 #include "util/log.h"
 
-bool
-video_buffer_init(struct video_buffer *vb, struct fps_counter *fps_counter,
-                  bool render_expired_frames) {
-    vb->fps_counter = fps_counter;
+#define SC_BUFFERING_NDEBUG // comment to debug
 
-    if (!(vb->decoding_frame = av_frame_alloc())) {
-        goto error_0;
+static struct sc_video_buffer_frame *
+sc_video_buffer_frame_new(const AVFrame *frame) {
+    struct sc_video_buffer_frame *vb_frame = malloc(sizeof(*vb_frame));
+    if (!vb_frame) {
+        return NULL;
     }
 
-    if (!(vb->rendering_frame = av_frame_alloc())) {
-        goto error_1;
+    vb_frame->frame = av_frame_alloc();
+    if (!vb_frame->frame) {
+        free(vb_frame);
+        return NULL;
     }
 
-    if (!(vb->mutex = SDL_CreateMutex())) {
-        goto error_2;
+    if (av_frame_ref(vb_frame->frame, frame)) {
+        av_frame_free(&vb_frame->frame);
+        free(vb_frame);
+        return NULL;
     }
 
-    vb->render_expired_frames = render_expired_frames;
-    if (render_expired_frames) {
-        if (!(vb->rendering_frame_consumed_cond = SDL_CreateCond())) {
-            SDL_DestroyMutex(vb->mutex);
-            goto error_2;
-        }
-        // interrupted is not used if expired frames are not rendered
-        // since offering a frame will never block
-        vb->interrupted = false;
-    }
-
-    // there is initially no rendering frame, so consider it has already been
-    // consumed
-    vb->rendering_frame_consumed = true;
-
-    return true;
-
-error_2:
-    av_frame_free(&vb->rendering_frame);
-error_1:
-    av_frame_free(&vb->decoding_frame);
-error_0:
-    return false;
-}
-
-void
-video_buffer_destroy(struct video_buffer *vb) {
-    if (vb->render_expired_frames) {
-        SDL_DestroyCond(vb->rendering_frame_consumed_cond);
-    }
-    SDL_DestroyMutex(vb->mutex);
-    av_frame_free(&vb->rendering_frame);
-    av_frame_free(&vb->decoding_frame);
+    return vb_frame;
 }
 
 static void
-video_buffer_swap_frames(struct video_buffer *vb) {
-    AVFrame *tmp = vb->decoding_frame;
-    vb->decoding_frame = vb->rendering_frame;
-    vb->rendering_frame = tmp;
+sc_video_buffer_frame_delete(struct sc_video_buffer_frame *vb_frame) {
+    av_frame_unref(vb_frame->frame);
+    av_frame_free(&vb_frame->frame);
+    free(vb_frame);
 }
 
-void
-video_buffer_offer_decoded_frame(struct video_buffer *vb,
-                                 bool *previous_frame_skipped) {
-    mutex_lock(vb->mutex);
-    if (vb->render_expired_frames) {
-        // wait for the current (expired) frame to be consumed
-        while (!vb->rendering_frame_consumed && !vb->interrupted) {
-            cond_wait(vb->rendering_frame_consumed_cond, vb->mutex);
+static bool
+sc_video_buffer_offer(struct sc_video_buffer *vb, const AVFrame *frame) {
+    bool previous_skipped;
+    bool ok = sc_frame_buffer_push(&vb->fb, frame, &previous_skipped);
+    if (!ok) {
+        return false;
+    }
+
+    vb->cbs->on_new_frame(vb, previous_skipped, vb->cbs_userdata);
+    return true;
+}
+
+static int
+run_buffering(void *data) {
+    struct sc_video_buffer *vb = data;
+
+    assert(vb->buffering_time > 0);
+
+    for (;;) {
+        sc_mutex_lock(&vb->b.mutex);
+
+        while (!vb->b.stopped && sc_queue_is_empty(&vb->b.queue)) {
+            sc_cond_wait(&vb->b.queue_cond, &vb->b.mutex);
         }
-    } else if (!vb->rendering_frame_consumed) {
-        fps_counter_add_skipped_frame(vb->fps_counter);
+
+        if (vb->b.stopped) {
+            sc_mutex_unlock(&vb->b.mutex);
+            goto stopped;
+        }
+
+        struct sc_video_buffer_frame *vb_frame;
+        sc_queue_take(&vb->b.queue, next, &vb_frame);
+
+        sc_tick max_deadline = sc_tick_now() + vb->buffering_time;
+        // PTS (written by the server) are expressed in microseconds
+        sc_tick pts = SC_TICK_TO_US(vb_frame->frame->pts);
+
+        bool timed_out = false;
+        while (!vb->b.stopped && !timed_out) {
+            sc_tick deadline = sc_clock_to_system_time(&vb->b.clock, pts)
+                             + vb->buffering_time;
+            if (deadline > max_deadline) {
+                deadline = max_deadline;
+            }
+
+            timed_out =
+                !sc_cond_timedwait(&vb->b.wait_cond, &vb->b.mutex, deadline);
+        }
+
+        if (vb->b.stopped) {
+            sc_video_buffer_frame_delete(vb_frame);
+            sc_mutex_unlock(&vb->b.mutex);
+            goto stopped;
+        }
+
+        sc_mutex_unlock(&vb->b.mutex);
+
+#ifndef SC_BUFFERING_NDEBUG
+        LOGD("Buffering: %" PRItick ";%" PRItick ";%" PRItick,
+             pts, vb_frame->push_date, sc_tick_now());
+#endif
+
+        sc_video_buffer_offer(vb, vb_frame->frame);
+
+        sc_video_buffer_frame_delete(vb_frame);
     }
 
-    video_buffer_swap_frames(vb);
+stopped:
+    // Flush queue
+    while (!sc_queue_is_empty(&vb->b.queue)) {
+        struct sc_video_buffer_frame *vb_frame;
+        sc_queue_take(&vb->b.queue, next, &vb_frame);
+        sc_video_buffer_frame_delete(vb_frame);
+    }
 
-    *previous_frame_skipped = !vb->rendering_frame_consumed;
-    vb->rendering_frame_consumed = false;
+    LOGD("Buffering thread ended");
 
-    mutex_unlock(vb->mutex);
+    return 0;
 }
 
-const AVFrame *
-video_buffer_consume_rendered_frame(struct video_buffer *vb) {
-    assert(!vb->rendering_frame_consumed);
-    vb->rendering_frame_consumed = true;
-    fps_counter_add_rendered_frame(vb->fps_counter);
-    if (vb->render_expired_frames) {
-        // unblock video_buffer_offer_decoded_frame()
-        cond_signal(vb->rendering_frame_consumed_cond);
+bool
+sc_video_buffer_init(struct sc_video_buffer *vb, sc_tick buffering_time,
+                     const struct sc_video_buffer_callbacks *cbs,
+                     void *cbs_userdata) {
+    bool ok = sc_frame_buffer_init(&vb->fb);
+    if (!ok) {
+        return false;
     }
-    return vb->rendering_frame;
+
+    assert(buffering_time >= 0);
+    if (buffering_time) {
+        ok = sc_mutex_init(&vb->b.mutex);
+        if (!ok) {
+            LOGC("Could not create mutex");
+            sc_frame_buffer_destroy(&vb->fb);
+            return false;
+        }
+
+        ok = sc_cond_init(&vb->b.queue_cond);
+        if (!ok) {
+            LOGC("Could not create cond");
+            sc_mutex_destroy(&vb->b.mutex);
+            sc_frame_buffer_destroy(&vb->fb);
+            return false;
+        }
+
+        ok = sc_cond_init(&vb->b.wait_cond);
+        if (!ok) {
+            LOGC("Could not create wait cond");
+            sc_cond_destroy(&vb->b.queue_cond);
+            sc_mutex_destroy(&vb->b.mutex);
+            sc_frame_buffer_destroy(&vb->fb);
+            return false;
+        }
+
+        sc_clock_init(&vb->b.clock);
+        sc_queue_init(&vb->b.queue);
+    }
+
+    assert(cbs);
+    assert(cbs->on_new_frame);
+
+    vb->buffering_time = buffering_time;
+    vb->cbs = cbs;
+    vb->cbs_userdata = cbs_userdata;
+    return true;
+}
+
+bool
+sc_video_buffer_start(struct sc_video_buffer *vb) {
+    if (vb->buffering_time) {
+        bool ok =
+            sc_thread_create(&vb->b.thread, run_buffering, "buffering", vb);
+        if (!ok) {
+            LOGE("Could not start buffering thread");
+            return false;
+        }
+    }
+
+    return true;
 }
 
 void
-video_buffer_interrupt(struct video_buffer *vb) {
-    if (vb->render_expired_frames) {
-        mutex_lock(vb->mutex);
-        vb->interrupted = true;
-        mutex_unlock(vb->mutex);
-        // wake up blocking wait
-        cond_signal(vb->rendering_frame_consumed_cond);
+sc_video_buffer_stop(struct sc_video_buffer *vb) {
+    if (vb->buffering_time) {
+        sc_mutex_lock(&vb->b.mutex);
+        vb->b.stopped = true;
+        sc_cond_signal(&vb->b.queue_cond);
+        sc_cond_signal(&vb->b.wait_cond);
+        sc_mutex_unlock(&vb->b.mutex);
     }
 }
+
+void
+sc_video_buffer_join(struct sc_video_buffer *vb) {
+    if (vb->buffering_time) {
+        sc_thread_join(&vb->b.thread, NULL);
+    }
+}
+
+void
+sc_video_buffer_destroy(struct sc_video_buffer *vb) {
+    sc_frame_buffer_destroy(&vb->fb);
+    if (vb->buffering_time) {
+        sc_cond_destroy(&vb->b.wait_cond);
+        sc_cond_destroy(&vb->b.queue_cond);
+        sc_mutex_destroy(&vb->b.mutex);
+    }
+}
+
+bool
+sc_video_buffer_push(struct sc_video_buffer *vb, const AVFrame *frame) {
+    if (!vb->buffering_time) {
+        // No buffering
+        return sc_video_buffer_offer(vb, frame);
+    }
+
+    sc_mutex_lock(&vb->b.mutex);
+
+    sc_tick pts = SC_TICK_FROM_US(frame->pts);
+    sc_clock_update(&vb->b.clock, sc_tick_now(), pts);
+    sc_cond_signal(&vb->b.wait_cond);
+
+    if (vb->b.clock.count == 1) {
+        sc_mutex_unlock(&vb->b.mutex);
+        // First frame, offer it immediately, for two reasons:
+        //  - not to delay the opening of the scrcpy window
+        //  - the buffering estimation needs at least two clock points, so it
+        //  could not handle the first frame
+        return sc_video_buffer_offer(vb, frame);
+    }
+
+    struct sc_video_buffer_frame *vb_frame = sc_video_buffer_frame_new(frame);
+    if (!vb_frame) {
+        sc_mutex_unlock(&vb->b.mutex);
+        LOGE("Could not allocate frame");
+        return false;
+    }
+
+#ifndef SC_BUFFERING_NDEBUG
+    vb_frame->push_date = sc_tick_now();
+#endif
+    sc_queue_push(&vb->b.queue, next, vb_frame);
+    sc_cond_signal(&vb->b.queue_cond);
+
+    sc_mutex_unlock(&vb->b.mutex);
+
+    return true;
+}
+
+void
+sc_video_buffer_consume(struct sc_video_buffer *vb, AVFrame *dst) {
+    sc_frame_buffer_consume(&vb->fb, dst);
+}

app/src/video_buffer.h

@@ -1,50 +1,76 @@
-#ifndef VIDEO_BUFFER_H
-#define VIDEO_BUFFER_H
+#ifndef SC_VIDEO_BUFFER_H
+#define SC_VIDEO_BUFFER_H
 
 #include "common.h"
 
 #include <stdbool.h>
-#include <SDL2/SDL_mutex.h>
 
-#include "fps_counter.h"
+#include "clock.h"
+#include "frame_buffer.h"
+#include "util/queue.h"
+#include "util/thread.h"
+#include "util/tick.h"
 
 // forward declarations
 typedef struct AVFrame AVFrame;
 
-struct video_buffer {
-    AVFrame *decoding_frame;
-    AVFrame *rendering_frame;
-    SDL_mutex *mutex;
-    bool render_expired_frames;
-    bool interrupted;
-    SDL_cond *rendering_frame_consumed_cond;
-    bool rendering_frame_consumed;
-    struct fps_counter *fps_counter;
+struct sc_video_buffer_frame {
+    AVFrame *frame;
+    struct sc_video_buffer_frame *next;
+#ifndef NDEBUG
+    sc_tick push_date;
+#endif
+};
+
+struct sc_video_buffer_frame_queue SC_QUEUE(struct sc_video_buffer_frame);
+
+struct sc_video_buffer {
+    struct sc_frame_buffer fb;
+
+    sc_tick buffering_time;
+
+    // only if buffering_ms > 0
+    struct {
+        sc_thread thread;
+        sc_mutex mutex;
+        sc_cond queue_cond;
+        sc_cond wait_cond;
+
+        struct sc_clock clock;
+        struct sc_video_buffer_frame_queue queue;
+        bool stopped;
+    } b; // buffering
+
+    const struct sc_video_buffer_callbacks *cbs;
+    void *cbs_userdata;
+};
+
+struct sc_video_buffer_callbacks {
+    void (*on_new_frame)(struct sc_video_buffer *vb, bool previous_skipped,
+                         void *userdata);
 };
 
 bool
-video_buffer_init(struct video_buffer *vb, struct fps_counter *fps_counter,
-                  bool render_expired_frames);
+sc_video_buffer_init(struct sc_video_buffer *vb, sc_tick buffering_time,
+                     const struct sc_video_buffer_callbacks *cbs,
+                     void *cbs_userdata);
+
+bool
+sc_video_buffer_start(struct sc_video_buffer *vb);
 
 void
-video_buffer_destroy(struct video_buffer *vb);
+sc_video_buffer_stop(struct sc_video_buffer *vb);
 
-// set the decoded frame as ready for rendering
-// this function locks frames->mutex during its execution
-// the output flag is set to report whether the previous frame has been skipped
 void
-video_buffer_offer_decoded_frame(struct video_buffer *vb,
-                                 bool *previous_frame_skipped);
+sc_video_buffer_join(struct sc_video_buffer *vb);
 
-// mark the rendering frame as consumed and return it
-// MUST be called with frames->mutex locked!!!
-// the caller is expected to render the returned frame to some texture before
-// unlocking frames->mutex
-const AVFrame *
-video_buffer_consume_rendered_frame(struct video_buffer *vb);
-
-// wake up and avoid any blocking call
 void
-video_buffer_interrupt(struct video_buffer *vb);
+sc_video_buffer_destroy(struct sc_video_buffer *vb);
+
+bool
+sc_video_buffer_push(struct sc_video_buffer *vb, const AVFrame *frame);
+
+void
+sc_video_buffer_consume(struct sc_video_buffer *vb, AVFrame *dst);
 
 #endif

app/tests/test_cli.c

@@ -51,14 +51,13 @@ static void test_options(void) {
         "--fullscreen",
         "--max-fps", "30",
         "--max-size", "1024",
-        "--lock-video-orientation", "2",
+        "--lock-video-orientation=2", // optional arguments require '='
         // "--no-control" is not compatible with "--turn-screen-off"
         // "--no-display" is not compatible with "--fulscreen"
         "--port", "1234:1236",
         "--push-target", "/sdcard/Movies",
         "--record", "file",
         "--record-format", "mkv",
-        "--render-expired-frames",
         "--serial", "0123456789abcdef",
         "--show-touches",
         "--turn-screen-off",
@@ -87,7 +86,6 @@ static void test_options(void) {
     assert(!strcmp(opts->push_target, "/sdcard/Movies"));
     assert(!strcmp(opts->record_filename, "file"));
     assert(opts->record_format == SC_RECORD_FORMAT_MKV);
-    assert(opts->render_expired_frames);
     assert(!strcmp(opts->serial, "0123456789abcdef"));
     assert(opts->show_touches);
     assert(opts->turn_screen_off);

app/tests/test_clock.c

@@ -0,0 +1,79 @@
+#include "common.h"
+
+#include <assert.h>
+
+#include "clock.h"
+
+void test_small_rolling_sum(void) {
+    struct sc_clock clock;
+    sc_clock_init(&clock);
+
+    assert(clock.count == 0);
+    assert(clock.left_sum.system == 0);
+    assert(clock.left_sum.stream == 0);
+    assert(clock.right_sum.system == 0);
+    assert(clock.right_sum.stream == 0);
+
+    sc_clock_update(&clock, 2, 3);
+    assert(clock.count == 1);
+    assert(clock.left_sum.system == 0);
+    assert(clock.left_sum.stream == 0);
+    assert(clock.right_sum.system == 2);
+    assert(clock.right_sum.stream == 3);
+
+    sc_clock_update(&clock, 10, 20);
+    assert(clock.count == 2);
+    assert(clock.left_sum.system == 2);
+    assert(clock.left_sum.stream == 3);
+    assert(clock.right_sum.system == 10);
+    assert(clock.right_sum.stream == 20);
+
+    sc_clock_update(&clock, 40, 80);
+    assert(clock.count == 3);
+    assert(clock.left_sum.system == 2);
+    assert(clock.left_sum.stream == 3);
+    assert(clock.right_sum.system == 50);
+    assert(clock.right_sum.stream == 100);
+
+    sc_clock_update(&clock, 400, 800);
+    assert(clock.count == 4);
+    assert(clock.left_sum.system == 12);
+    assert(clock.left_sum.stream == 23);
+    assert(clock.right_sum.system == 440);
+    assert(clock.right_sum.stream == 880);
+}
+
+void test_large_rolling_sum(void) {
+    const unsigned half_range = SC_CLOCK_RANGE / 2;
+
+    struct sc_clock clock1;
+    sc_clock_init(&clock1);
+    for (unsigned i = 0; i < 5 * half_range; ++i) {
+        sc_clock_update(&clock1, i, 2 * i + 1);
+    }
+
+    struct sc_clock clock2;
+    sc_clock_init(&clock2);
+    for (unsigned i = 3 * half_range; i < 5 * half_range; ++i) {
+        sc_clock_update(&clock2, i, 2 * i + 1);
+    }
+
+    assert(clock1.count == SC_CLOCK_RANGE);
+    assert(clock2.count == SC_CLOCK_RANGE);
+
+    // The values before the last SC_CLOCK_RANGE points in clock1 should have
+    // no impact
+    assert(clock1.left_sum.system == clock2.left_sum.system);
+    assert(clock1.left_sum.stream == clock2.left_sum.stream);
+    assert(clock1.right_sum.system == clock2.right_sum.system);
+    assert(clock1.right_sum.stream == clock2.right_sum.stream);
+}
+
+int main(int argc, char *argv[]) {
+    (void) argc;
+    (void) argv;
+
+    test_small_rolling_sum();
+    test_large_rolling_sum();
+    return 0;
+};

app/tests/test_control_msg_serialize.c

@@ -146,14 +146,18 @@ static void test_serialize_inject_scroll_event(void) {
 static void test_serialize_back_or_screen_on(void) {
     struct control_msg msg = {
         .type = CONTROL_MSG_TYPE_BACK_OR_SCREEN_ON,
+        .back_or_screen_on = {
+            .action = AKEY_EVENT_ACTION_UP,
+        },
     };
 
     unsigned char buf[CONTROL_MSG_MAX_SIZE];
     size_t size = control_msg_serialize(&msg, buf);
-    assert(size == 1);
+    assert(size == 2);
 
     const unsigned char expected[] = {
         CONTROL_MSG_TYPE_BACK_OR_SCREEN_ON,
+        0x01, // AKEY_EVENT_ACTION_UP
     };
     assert(!memcmp(buf, expected, sizeof(expected)));
 }
@@ -173,9 +177,9 @@ static void test_serialize_expand_notification_panel(void) {
     assert(!memcmp(buf, expected, sizeof(expected)));
 }
 
-static void test_serialize_collapse_notification_panel(void) {
+static void test_serialize_expand_settings_panel(void) {
     struct control_msg msg = {
-        .type = CONTROL_MSG_TYPE_COLLAPSE_NOTIFICATION_PANEL,
+        .type = CONTROL_MSG_TYPE_EXPAND_SETTINGS_PANEL,
     };
 
     unsigned char buf[CONTROL_MSG_MAX_SIZE];
@@ -183,7 +187,22 @@ static void test_serialize_collapse_notification_panel(void) {
     assert(size == 1);
 
     const unsigned char expected[] = {
-        CONTROL_MSG_TYPE_COLLAPSE_NOTIFICATION_PANEL,
+        CONTROL_MSG_TYPE_EXPAND_SETTINGS_PANEL,
+    };
+    assert(!memcmp(buf, expected, sizeof(expected)));
+}
+
+static void test_serialize_collapse_panels(void) {
+    struct control_msg msg = {
+        .type = CONTROL_MSG_TYPE_COLLAPSE_PANELS,
+    };
+
+    unsigned char buf[CONTROL_MSG_MAX_SIZE];
+    size_t size = control_msg_serialize(&msg, buf);
+    assert(size == 1);
+
+    const unsigned char expected[] = {
+        CONTROL_MSG_TYPE_COLLAPSE_PANELS,
     };
     assert(!memcmp(buf, expected, sizeof(expected)));
 }
@@ -270,7 +289,8 @@ int main(int argc, char *argv[]) {
     test_serialize_inject_scroll_event();
     test_serialize_back_or_screen_on();
     test_serialize_expand_notification_panel();
-    test_serialize_collapse_notification_panel();
+    test_serialize_expand_settings_panel();
+    test_serialize_collapse_panels();
     test_serialize_get_clipboard();
     test_serialize_set_clipboard();
     test_serialize_set_screen_power_mode();

app/tests/test_queue.c

@@ -10,28 +10,28 @@ struct foo {
 };
 
 static void test_queue(void) {
-    struct my_queue QUEUE(struct foo) queue;
-    queue_init(&queue);
+    struct my_queue SC_QUEUE(struct foo) queue;
+    sc_queue_init(&queue);
 
-    assert(queue_is_empty(&queue));
+    assert(sc_queue_is_empty(&queue));
 
     struct foo v1 = { .value = 42 };
     struct foo v2 = { .value = 27 };
 
-    queue_push(&queue, next, &v1);
-    queue_push(&queue, next, &v2);
+    sc_queue_push(&queue, next, &v1);
+    sc_queue_push(&queue, next, &v2);
 
     struct foo *foo;
 
-    assert(!queue_is_empty(&queue));
-    queue_take(&queue, next, &foo);
+    assert(!sc_queue_is_empty(&queue));
+    sc_queue_take(&queue, next, &foo);
     assert(foo->value == 42);
 
-    assert(!queue_is_empty(&queue));
-    queue_take(&queue, next, &foo);
+    assert(!sc_queue_is_empty(&queue));
+    sc_queue_take(&queue, next, &foo);
     assert(foo->value == 27);
 
-    assert(queue_is_empty(&queue));
+    assert(sc_queue_is_empty(&queue));
 }
 
 int main(int argc, char *argv[]) {

app/tests/test_strutil.c

@@ -4,7 +4,6 @@
 #include <limits.h>
 #include <stdio.h>
 #include <string.h>
-#include <SDL2/SDL.h>
 
 #include "util/str_util.h"
 
@@ -138,7 +137,7 @@ static void test_strquote(void) {
     // add '"' at the beginning and the end
     assert(!strcmp("\"abcde\"", out));
 
-    SDL_free(out);
+    free(out);
 }
 
 static void test_utf8_truncate(void) {
@@ -288,6 +287,18 @@ static void test_parse_integer_with_suffix(void) {
     assert(!ok);
 }
 
+static void test_strlist_contains(void) {
+    assert(strlist_contains("a,bc,def", ',', "bc"));
+    assert(!strlist_contains("a,bc,def", ',', "b"));
+    assert(strlist_contains("", ',', ""));
+    assert(strlist_contains("abc,", ',', ""));
+    assert(strlist_contains(",abc", ',', ""));
+    assert(strlist_contains("abc,,def", ',', ""));
+    assert(!strlist_contains("abc", ',', ""));
+    assert(strlist_contains(",,|x", '|', ",,"));
+    assert(strlist_contains("xyz", '\0', "xyz"));
+}
+
 int main(int argc, char *argv[]) {
     (void) argc;
     (void) argv;
@@ -305,5 +316,6 @@ int main(int argc, char *argv[]) {
     test_parse_integer();
     test_parse_integers();
     test_parse_integer_with_suffix();
+    test_strlist_contains();
     return 0;
 }

cross_win32.txt

@@ -2,11 +2,11 @@
 
 [binaries]
 name = 'mingw'
-c = '/usr/bin/i686-w64-mingw32-gcc'
-cpp = '/usr/bin/i686-w64-mingw32-g++'
-ar = '/usr/bin/i686-w64-mingw32-ar'
-strip = '/usr/bin/i686-w64-mingw32-strip'
-pkgconfig = '/usr/bin/i686-w64-mingw32-pkg-config'
+c = 'i686-w64-mingw32-gcc'
+cpp = 'i686-w64-mingw32-g++'
+ar = 'i686-w64-mingw32-ar'
+strip = 'i686-w64-mingw32-strip'
+pkgconfig = 'i686-w64-mingw32-pkg-config'
 
 [host_machine]
 system = 'windows'

cross_win64.txt

@@ -2,11 +2,11 @@
 
 [binaries]
 name = 'mingw'
-c = '/usr/bin/x86_64-w64-mingw32-gcc'
-cpp = '/usr/bin/x86_64-w64-mingw32-g++'
-ar = '/usr/bin/x86_64-w64-mingw32-ar'
-strip = '/usr/bin/x86_64-w64-mingw32-strip'
-pkgconfig = '/usr/bin/x86_64-w64-mingw32-pkg-config'
+c = 'x86_64-w64-mingw32-gcc'
+cpp = 'x86_64-w64-mingw32-g++'
+ar = 'x86_64-w64-mingw32-ar'
+strip = 'x86_64-w64-mingw32-strip'
+pkgconfig = 'x86_64-w64-mingw32-pkg-config'
 
 [host_machine]
 system = 'windows'

data/scrcpy-noconsole.vbs

@@ -1 +1,7 @@
-CreateObject("Wscript.Shell").Run "cmd /c scrcpy.exe", 0, false
+strCommand = "cmd /c scrcpy.exe"
+
+For Each Arg In WScript.Arguments
+    strCommand = strCommand & " """ & replace(Arg, """", """""""""") & """"
+Next
+
+CreateObject("Wscript.Shell").Run strCommand, 0, false

install_release.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -e
+
+BUILDDIR=build-auto
+PREBUILT_SERVER_URL=https://github.com/Genymobile/scrcpy/releases/download/v1.18/scrcpy-server-v1.18
+PREBUILT_SERVER_SHA256=641c5c6beda9399dfae72d116f5ff43b5ed1059d871c9ebc3f47610fd33c51a3
+
+echo "[scrcpy] Downloading prebuilt server..."
+wget "$PREBUILT_SERVER_URL" -O scrcpy-server
+echo "[scrcpy] Verifying prebuilt server..."
+echo "$PREBUILT_SERVER_SHA256  scrcpy-server" | sha256sum --check
+
+echo "[scrcpy] Building client..."
+rm -rf "$BUILDDIR"
+meson "$BUILDDIR" --buildtype release --strip -Db_lto=true \
+    -Dprebuilt_server=scrcpy-server
+cd "$BUILDDIR"
+ninja
+
+echo "[scrcpy] Installing (sudo)..."
+sudo ninja install

meson.build

@@ -1,9 +1,10 @@
 project('scrcpy', 'c',
-        version: '1.17',
+        version: '1.18',
         meson_version: '>= 0.48',
         default_options: [
             'c_std=c11',
             'warning_level=2',
+            'b_ndebug=if-release',
         ])
 
 if get_option('compile_app')

meson_options.txt

@@ -3,6 +3,5 @@ option('compile_server', type: 'boolean', value: true, description: 'Build the s
 option('crossbuild_windows', type: 'boolean', value: false, description: 'Build for Windows from Linux')
 option('prebuilt_server', type: 'string', description: 'Path of the prebuilt server')
 option('portable', type: 'boolean', value: false, description: 'Use scrcpy-server from the same directory as the scrcpy executable')
-option('hidpi_support', type: 'boolean', value: true, description: 'Enable High DPI support')
 option('server_debugger', type: 'boolean', value: false, description: 'Run a server debugger and wait for a client to be attached')
 option('server_debugger_method', type: 'combo', choices: ['old', 'new'], value: 'new', description: 'Select the debugger method (Android < 9: "old", Android >= 9: "new")')

prebuilt-deps/Makefile

@@ -35,6 +35,6 @@ prepare-sdl2:
 		SDL2-2.0.14
 
 prepare-adb:
-	@./prepare-dep https://dl.google.com/android/repository/platform-tools_r30.0.5-windows.zip \
-		549ba2bdc31f335eb8a504f005f77606a479cc216d6b64a3e8b64c780003661f \
+	@./prepare-dep https://dl.google.com/android/repository/platform-tools_r31.0.2-windows.zip \
+		d560cb8ded83ae04763b94632673481f14843a5969256569623cfeac82db4ba5 \
 		platform-tools

server/build.gradle

@@ -6,8 +6,8 @@ android {
         applicationId "com.genymobile.scrcpy"
         minSdkVersion 21
         targetSdkVersion 30
-        versionCode 20
-        versionName "1.17"
+        versionCode 11800
+        versionName "1.18"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
     buildTypes {

server/build_without_gradle.sh

@@ -12,7 +12,7 @@
 set -e
 
 SCRCPY_DEBUG=false
-SCRCPY_VERSION_NAME=1.17
+SCRCPY_VERSION_NAME=1.18
 
 PLATFORM=${ANDROID_PLATFORM:-30}
 BUILD_TOOLS=${ANDROID_BUILD_TOOLS:-30.0.0}

server/src/main/java/com/genymobile/scrcpy/CleanUp.java

@@ -3,6 +3,10 @@ package com.genymobile.scrcpy;
 import com.genymobile.scrcpy.wrappers.ContentProvider;
 import com.genymobile.scrcpy.wrappers.ServiceManager;
 
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.Base64;
+
 import java.io.File;
 import java.io.IOException;
 
@@ -15,23 +19,123 @@ public final class CleanUp {
 
     public static final String SERVER_PATH = "/data/local/tmp/scrcpy-server.jar";
 
+    // A simple struct to be passed from the main process to the cleanup process
+    public static class Config implements Parcelable {
+
+        public static final Creator<Config> CREATOR = new Creator<Config>() {
+            @Override
+            public Config createFromParcel(Parcel in) {
+                return new Config(in);
+            }
+
+            @Override
+            public Config[] newArray(int size) {
+                return new Config[size];
+            }
+        };
+
+        private static final int FLAG_DISABLE_SHOW_TOUCHES = 1;
+        private static final int FLAG_RESTORE_NORMAL_POWER_MODE = 2;
+        private static final int FLAG_POWER_OFF_SCREEN = 4;
+
+        private int displayId;
+
+        // Restore the value (between 0 and 7), -1 to not restore
+        // <https://developer.android.com/reference/android/provider/Settings.Global#STAY_ON_WHILE_PLUGGED_IN>
+        private int restoreStayOn = -1;
+
+        private boolean disableShowTouches;
+        private boolean restoreNormalPowerMode;
+        private boolean powerOffScreen;
+
+        public Config() {
+            // Default constructor, the fields are initialized by CleanUp.configure()
+        }
+
+        protected Config(Parcel in) {
+            displayId = in.readInt();
+            restoreStayOn = in.readInt();
+            byte options = in.readByte();
+            disableShowTouches = (options & FLAG_DISABLE_SHOW_TOUCHES) != 0;
+            restoreNormalPowerMode = (options & FLAG_RESTORE_NORMAL_POWER_MODE) != 0;
+            powerOffScreen = (options & FLAG_POWER_OFF_SCREEN) != 0;
+        }
+
+        @Override
+        public void writeToParcel(Parcel dest, int flags) {
+            dest.writeInt(displayId);
+            dest.writeInt(restoreStayOn);
+            byte options = 0;
+            if (disableShowTouches) {
+                options |= FLAG_DISABLE_SHOW_TOUCHES;
+            }
+            if (restoreNormalPowerMode) {
+                options |= FLAG_RESTORE_NORMAL_POWER_MODE;
+            }
+            if (powerOffScreen) {
+                options |= FLAG_POWER_OFF_SCREEN;
+            }
+            dest.writeByte(options);
+        }
+
+        private boolean hasWork() {
+            return disableShowTouches || restoreStayOn != -1 || restoreNormalPowerMode || powerOffScreen;
+        }
+
+        @Override
+        public int describeContents() {
+            return 0;
+        }
+
+        byte[] serialize() {
+            Parcel parcel = Parcel.obtain();
+            writeToParcel(parcel, 0);
+            byte[] bytes = parcel.marshall();
+            parcel.recycle();
+            return bytes;
+        }
+
+        static Config deserialize(byte[] bytes) {
+            Parcel parcel = Parcel.obtain();
+            parcel.unmarshall(bytes, 0, bytes.length);
+            parcel.setDataPosition(0);
+            return CREATOR.createFromParcel(parcel);
+        }
+
+        static Config fromBase64(String base64) {
+            byte[] bytes = Base64.decode(base64, Base64.NO_WRAP);
+            return deserialize(bytes);
+        }
+
+        String toBase64() {
+            byte[] bytes = serialize();
+            return Base64.encodeToString(bytes, Base64.NO_WRAP);
+        }
+    }
+
     private CleanUp() {
         // not instantiable
     }
 
-    public static void configure(boolean disableShowTouches, int restoreStayOn, boolean restoreNormalPowerMode) throws IOException {
-        boolean needProcess = disableShowTouches || restoreStayOn != -1 || restoreNormalPowerMode;
-        if (needProcess) {
-            startProcess(disableShowTouches, restoreStayOn, restoreNormalPowerMode);
+    public static void configure(int displayId, int restoreStayOn, boolean disableShowTouches, boolean restoreNormalPowerMode, boolean powerOffScreen)
+            throws IOException {
+        Config config = new Config();
+        config.displayId = displayId;
+        config.disableShowTouches = disableShowTouches;
+        config.restoreStayOn = restoreStayOn;
+        config.restoreNormalPowerMode = restoreNormalPowerMode;
+        config.powerOffScreen = powerOffScreen;
+
+        if (config.hasWork()) {
+            startProcess(config);
         } else {
             // There is no additional clean up to do when scrcpy dies
             unlinkSelf();
         }
     }
 
-    private static void startProcess(boolean disableShowTouches, int restoreStayOn, boolean restoreNormalPowerMode) throws IOException {
-        String[] cmd = {"app_process", "/", CleanUp.class.getName(), String.valueOf(disableShowTouches), String.valueOf(
-                restoreStayOn), String.valueOf(restoreNormalPowerMode)};
+    private static void startProcess(Config config) throws IOException {
+        String[] cmd = {"app_process", "/", CleanUp.class.getName(), config.toBase64()};
 
         ProcessBuilder builder = new ProcessBuilder(cmd);
         builder.environment().put("CLASSPATH", SERVER_PATH);
@@ -58,27 +162,28 @@ public final class CleanUp {
 
         Ln.i("Cleaning up");
 
-        boolean disableShowTouches = Boolean.parseBoolean(args[0]);
-        int restoreStayOn = Integer.parseInt(args[1]);
-        boolean restoreNormalPowerMode = Boolean.parseBoolean(args[2]);
+        Config config = Config.fromBase64(args[0]);
 
-        if (disableShowTouches || restoreStayOn != -1) {
+        if (config.disableShowTouches || config.restoreStayOn != -1) {
             ServiceManager serviceManager = new ServiceManager();
             try (ContentProvider settings = serviceManager.getActivityManager().createSettingsProvider()) {
-                if (disableShowTouches) {
+                if (config.disableShowTouches) {
                     Ln.i("Disabling \"show touches\"");
                     settings.putValue(ContentProvider.TABLE_SYSTEM, "show_touches", "0");
                 }
-                if (restoreStayOn != -1) {
+                if (config.restoreStayOn != -1) {
                     Ln.i("Restoring \"stay awake\"");
-                    settings.putValue(ContentProvider.TABLE_GLOBAL, "stay_on_while_plugged_in", String.valueOf(restoreStayOn));
+                    settings.putValue(ContentProvider.TABLE_GLOBAL, "stay_on_while_plugged_in", String.valueOf(config.restoreStayOn));
                 }
             }
         }
 
-        if (restoreNormalPowerMode) {
-            Ln.i("Restoring normal power mode");
-            if (Device.isScreenOn()) {
+        if (Device.isScreenOn()) {
+            if (config.powerOffScreen) {
+                Ln.i("Power off screen");
+                Device.powerOffScreen(config.displayId);
+            } else if (config.restoreNormalPowerMode) {
+                Ln.i("Restoring normal power mode");
                 Device.setScreenPowerMode(Device.POWER_MODE_NORMAL);
             }
         }

server/src/main/java/com/genymobile/scrcpy/ControlMessage.java

@@ -11,11 +11,12 @@ public final class ControlMessage {
     public static final int TYPE_INJECT_SCROLL_EVENT = 3;
     public static final int TYPE_BACK_OR_SCREEN_ON = 4;
     public static final int TYPE_EXPAND_NOTIFICATION_PANEL = 5;
-    public static final int TYPE_COLLAPSE_NOTIFICATION_PANEL = 6;
-    public static final int TYPE_GET_CLIPBOARD = 7;
-    public static final int TYPE_SET_CLIPBOARD = 8;
-    public static final int TYPE_SET_SCREEN_POWER_MODE = 9;
-    public static final int TYPE_ROTATE_DEVICE = 10;
+    public static final int TYPE_EXPAND_SETTINGS_PANEL = 6;
+    public static final int TYPE_COLLAPSE_PANELS = 7;
+    public static final int TYPE_GET_CLIPBOARD = 8;
+    public static final int TYPE_SET_CLIPBOARD = 9;
+    public static final int TYPE_SET_SCREEN_POWER_MODE = 10;
+    public static final int TYPE_ROTATE_DEVICE = 11;
 
     private int type;
     private String text;
@@ -71,6 +72,13 @@ public final class ControlMessage {
         return msg;
     }
 
+    public static ControlMessage createBackOrScreenOn(int action) {
+        ControlMessage msg = new ControlMessage();
+        msg.type = TYPE_BACK_OR_SCREEN_ON;
+        msg.action = action;
+        return msg;
+    }
+
     public static ControlMessage createSetClipboard(String text, boolean paste) {
         ControlMessage msg = new ControlMessage();
         msg.type = TYPE_SET_CLIPBOARD;

server/src/main/java/com/genymobile/scrcpy/ControlMessageReader.java

@@ -11,6 +11,7 @@ public class ControlMessageReader {
     static final int INJECT_KEYCODE_PAYLOAD_LENGTH = 13;
     static final int INJECT_TOUCH_EVENT_PAYLOAD_LENGTH = 27;
     static final int INJECT_SCROLL_EVENT_PAYLOAD_LENGTH = 20;
+    static final int BACK_OR_SCREEN_ON_LENGTH = 1;
     static final int SET_SCREEN_POWER_MODE_PAYLOAD_LENGTH = 1;
     static final int SET_CLIPBOARD_FIXED_PAYLOAD_LENGTH = 1;
 
@@ -66,15 +67,18 @@ public class ControlMessageReader {
             case ControlMessage.TYPE_INJECT_SCROLL_EVENT:
                 msg = parseInjectScrollEvent();
                 break;
+            case ControlMessage.TYPE_BACK_OR_SCREEN_ON:
+                msg = parseBackOrScreenOnEvent();
+                break;
             case ControlMessage.TYPE_SET_CLIPBOARD:
                 msg = parseSetClipboard();
                 break;
             case ControlMessage.TYPE_SET_SCREEN_POWER_MODE:
                 msg = parseSetScreenPowerMode();
                 break;
-            case ControlMessage.TYPE_BACK_OR_SCREEN_ON:
             case ControlMessage.TYPE_EXPAND_NOTIFICATION_PANEL:
-            case ControlMessage.TYPE_COLLAPSE_NOTIFICATION_PANEL:
+            case ControlMessage.TYPE_EXPAND_SETTINGS_PANEL:
+            case ControlMessage.TYPE_COLLAPSE_PANELS:
             case ControlMessage.TYPE_GET_CLIPBOARD:
             case ControlMessage.TYPE_ROTATE_DEVICE:
                 msg = ControlMessage.createEmpty(type);
@@ -150,6 +154,14 @@ public class ControlMessageReader {
         return ControlMessage.createInjectScrollEvent(position, hScroll, vScroll);
     }
 
+    private ControlMessage parseBackOrScreenOnEvent() {
+        if (buffer.remaining() < BACK_OR_SCREEN_ON_LENGTH) {
+            return null;
+        }
+        int action = toUnsigned(buffer.get());
+        return ControlMessage.createBackOrScreenOn(action);
+    }
+
     private ControlMessage parseSetClipboard() {
         if (buffer.remaining() < SET_CLIPBOARD_FIXED_PAYLOAD_LENGTH) {
             return null;

server/src/main/java/com/genymobile/scrcpy/Controller.java

@@ -14,7 +14,7 @@ import java.util.concurrent.TimeUnit;
 
 public class Controller {
 
-    private static final int DEVICE_ID_VIRTUAL = -1;
+    private static final int DEFAULT_DEVICE_ID = 0;
 
     private static final ScheduledExecutorService EXECUTOR = Executors.newSingleThreadScheduledExecutor();
 
@@ -45,7 +45,7 @@ public class Controller {
 
             MotionEvent.PointerCoords coords = new MotionEvent.PointerCoords();
             coords.orientation = 0;
-            coords.size = 1;
+            coords.size = 0;
 
             pointerProperties[i] = props;
             pointerCoords[i] = coords;
@@ -55,7 +55,7 @@ public class Controller {
     public void control() throws IOException {
         // on start, power on the device
         if (!Device.isScreenOn()) {
-            device.injectKeycode(KeyEvent.KEYCODE_POWER);
+            device.pressReleaseKeycode(KeyEvent.KEYCODE_POWER);
 
             // dirty hack
             // After POWER is injected, the device is powered on asynchronously.
@@ -101,13 +101,16 @@ public class Controller {
                 break;
             case ControlMessage.TYPE_BACK_OR_SCREEN_ON:
                 if (device.supportsInputEvents()) {
-                    pressBackOrTurnScreenOn();
+                    pressBackOrTurnScreenOn(msg.getAction());
                 }
                 break;
             case ControlMessage.TYPE_EXPAND_NOTIFICATION_PANEL:
                 Device.expandNotificationPanel();
                 break;
-            case ControlMessage.TYPE_COLLAPSE_NOTIFICATION_PANEL:
+            case ControlMessage.TYPE_EXPAND_SETTINGS_PANEL:
+                Device.expandSettingsPanel();
+                break;
+            case ControlMessage.TYPE_COLLAPSE_PANELS:
                 Device.collapsePanels();
                 break;
             case ControlMessage.TYPE_GET_CLIPBOARD:
@@ -208,9 +211,13 @@ public class Controller {
         // Right-click and middle-click only work if the source is a mouse
         boolean nonPrimaryButtonPressed = (buttons & ~MotionEvent.BUTTON_PRIMARY) != 0;
         int source = nonPrimaryButtonPressed ? InputDevice.SOURCE_MOUSE : InputDevice.SOURCE_TOUCHSCREEN;
+        if (source != InputDevice.SOURCE_MOUSE) {
+            // Buttons must not be set for touch events
+            buttons = 0;
+        }
 
         MotionEvent event = MotionEvent
-                .obtain(lastTouchDown, now, action, pointerCount, pointerProperties, pointerCoords, 0, buttons, 1f, 1f, DEVICE_ID_VIRTUAL, 0, source,
+                .obtain(lastTouchDown, now, action, pointerCount, pointerProperties, pointerCoords, 0, buttons, 1f, 1f, DEFAULT_DEVICE_ID, 0, source,
                         0);
         return device.injectEvent(event);
     }
@@ -233,7 +240,7 @@ public class Controller {
         coords.setAxisValue(MotionEvent.AXIS_VSCROLL, vScroll);
 
         MotionEvent event = MotionEvent
-                .obtain(lastTouchDown, now, MotionEvent.ACTION_SCROLL, 1, pointerProperties, pointerCoords, 0, 0, 1f, 1f, DEVICE_ID_VIRTUAL, 0,
+                .obtain(lastTouchDown, now, MotionEvent.ACTION_SCROLL, 1, pointerProperties, pointerCoords, 0, 0, 1f, 1f, DEFAULT_DEVICE_ID, 0,
                         InputDevice.SOURCE_TOUCHSCREEN, 0);
         return device.injectEvent(event);
     }
@@ -251,12 +258,22 @@ public class Controller {
         }, 200, TimeUnit.MILLISECONDS);
     }
 
-    private boolean pressBackOrTurnScreenOn() {
-        int keycode = Device.isScreenOn() ? KeyEvent.KEYCODE_BACK : KeyEvent.KEYCODE_POWER;
-        if (keepPowerModeOff && keycode == KeyEvent.KEYCODE_POWER) {
+    private boolean pressBackOrTurnScreenOn(int action) {
+        if (Device.isScreenOn()) {
+            return device.injectKeyEvent(action, KeyEvent.KEYCODE_BACK, 0, 0);
+        }
+
+        // Screen is off
+        // Only press POWER on ACTION_DOWN
+        if (action != KeyEvent.ACTION_DOWN) {
+            // do nothing,
+            return true;
+        }
+
+        if (keepPowerModeOff) {
             schedulePowerModeOff();
         }
-        return device.injectKeycode(keycode);
+        return device.pressReleaseKeycode(KeyEvent.KEYCODE_POWER);
     }
 
     private boolean setClipboard(String text, boolean paste) {
@@ -267,7 +284,7 @@ public class Controller {
 
         // On Android >= 7, also press the PASTE key if requested
         if (paste && Build.VERSION.SDK_INT >= Build.VERSION_CODES.N && device.supportsInputEvents()) {
-            device.injectKeycode(KeyEvent.KEYCODE_PASTE);
+            device.pressReleaseKeycode(KeyEvent.KEYCODE_PASTE);
         }
 
         return ok;

server/src/main/java/com/genymobile/scrcpy/Device.java

@@ -25,6 +25,9 @@ public final class Device {
     public static final int POWER_MODE_OFF = SurfaceControl.POWER_MODE_OFF;
     public static final int POWER_MODE_NORMAL = SurfaceControl.POWER_MODE_NORMAL;
 
+    public static final int LOCK_VIDEO_ORIENTATION_UNLOCKED = -1;
+    public static final int LOCK_VIDEO_ORIENTATION_INITIAL = -2;
+
     private static final ServiceManager SERVICE_MANAGER = new ServiceManager();
 
     public interface RotationListener {
@@ -153,12 +156,16 @@ public final class Device {
         return Build.MODEL;
     }
 
+    public static boolean supportsInputEvents(int displayId) {
+        return displayId == 0 || Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
+    }
+
     public boolean supportsInputEvents() {
         return supportsInputEvents;
     }
 
-    public boolean injectEvent(InputEvent inputEvent, int mode) {
-        if (!supportsInputEvents()) {
+    public static boolean injectEvent(InputEvent inputEvent, int displayId) {
+        if (!supportsInputEvents(displayId)) {
             throw new AssertionError("Could not inject input event if !supportsInputEvents()");
         }
 
@@ -166,22 +173,30 @@ public final class Device {
             return false;
         }
 
-        return SERVICE_MANAGER.getInputManager().injectInputEvent(inputEvent, mode);
+        return SERVICE_MANAGER.getInputManager().injectInputEvent(inputEvent, InputManager.INJECT_INPUT_EVENT_MODE_ASYNC);
     }
 
     public boolean injectEvent(InputEvent event) {
-        return injectEvent(event, InputManager.INJECT_INPUT_EVENT_MODE_ASYNC);
+        return injectEvent(event, displayId);
     }
 
-    public boolean injectKeyEvent(int action, int keyCode, int repeat, int metaState) {
+    public static boolean injectKeyEvent(int action, int keyCode, int repeat, int metaState, int displayId) {
         long now = SystemClock.uptimeMillis();
         KeyEvent event = new KeyEvent(now, now, action, keyCode, repeat, metaState, KeyCharacterMap.VIRTUAL_KEYBOARD, 0, 0,
                 InputDevice.SOURCE_KEYBOARD);
-        return injectEvent(event);
+        return injectEvent(event, displayId);
     }
 
-    public boolean injectKeycode(int keyCode) {
-        return injectKeyEvent(KeyEvent.ACTION_DOWN, keyCode, 0, 0) && injectKeyEvent(KeyEvent.ACTION_UP, keyCode, 0, 0);
+    public boolean injectKeyEvent(int action, int keyCode, int repeat, int metaState) {
+        return injectKeyEvent(action, keyCode, repeat, metaState, displayId);
+    }
+
+    public static boolean pressReleaseKeycode(int keyCode, int displayId) {
+        return injectKeyEvent(KeyEvent.ACTION_DOWN, keyCode, 0, 0, displayId) && injectKeyEvent(KeyEvent.ACTION_UP, keyCode, 0, 0, displayId);
+    }
+
+    public boolean pressReleaseKeycode(int keyCode) {
+        return pressReleaseKeycode(keyCode, displayId);
     }
 
     public static boolean isScreenOn() {
@@ -200,6 +215,10 @@ public final class Device {
         SERVICE_MANAGER.getStatusBarManager().expandNotificationsPanel();
     }
 
+    public static void expandSettingsPanel() {
+        SERVICE_MANAGER.getStatusBarManager().expandSettingsPanel();
+    }
+
     public static void collapsePanels() {
         SERVICE_MANAGER.getStatusBarManager().collapsePanels();
     }
@@ -249,6 +268,13 @@ public final class Device {
         return SurfaceControl.setDisplayPowerMode(d, mode);
     }
 
+    public static boolean powerOffScreen(int displayId) {
+        if (!isScreenOn()) {
+            return true;
+        }
+        return pressReleaseKeycode(KeyEvent.KEYCODE_POWER, displayId);
+    }
+
     /**
      * Disable auto-rotation (if enabled), set the screen rotation and re-enable auto-rotation (if it was enabled).
      */

server/src/main/java/com/genymobile/scrcpy/Ln.java

@@ -12,7 +12,7 @@ public final class Ln {
     private static final String PREFIX = "[server] ";
 
     enum Level {
-        DEBUG, INFO, WARN, ERROR
+        VERBOSE, DEBUG, INFO, WARN, ERROR
     }
 
     private static Level threshold = Level.INFO;
@@ -36,6 +36,13 @@ public final class Ln {
         return level.ordinal() >= threshold.ordinal();
     }
 
+    public static void v(String message) {
+        if (isEnabled(Level.VERBOSE)) {
+            Log.v(TAG, message);
+            System.out.println(PREFIX + "VERBOSE: " + message);
+        }
+    }
+
     public static void d(String message) {
         if (isEnabled(Level.DEBUG)) {
             Log.d(TAG, message);

server/src/main/java/com/genymobile/scrcpy/Options.java

@@ -17,6 +17,7 @@ public class Options {
     private boolean stayAwake;
     private String codecOptions;
     private String encoderName;
+    private boolean powerOffScreenOnClose;
 
     public Ln.Level getLogLevel() {
         return logLevel;
@@ -129,4 +130,12 @@ public class Options {
     public void setEncoderName(String encoderName) {
         this.encoderName = encoderName;
     }
+
+    public void setPowerOffScreenOnClose(boolean powerOffScreenOnClose) {
+        this.powerOffScreenOnClose = powerOffScreenOnClose;
+    }
+
+    public boolean getPowerOffScreenOnClose() {
+        return this.powerOffScreenOnClose;
+    }
 }

server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java

@@ -7,6 +7,7 @@ import android.media.MediaCodec;
 import android.media.MediaCodecInfo;
 import android.media.MediaCodecList;
 import android.media.MediaFormat;
+import android.os.Build;
 import android.os.IBinder;
 import android.view.Surface;
 
@@ -225,7 +226,11 @@ public class ScreenEncoder implements Device.RotationListener {
     }
 
     private static IBinder createDisplay() {
-        return SurfaceControl.createDisplay("scrcpy", true);
+        // Since Android 12 (preview), secure displays could not be created with shell permissions anymore.
+        // On Android 12 preview, SDK_INT is still R (not S), but CODENAME is "S".
+        boolean secure = Build.VERSION.SDK_INT < Build.VERSION_CODES.R || (Build.VERSION.SDK_INT == Build.VERSION_CODES.R && !"S"
+                .equals(Build.VERSION.CODENAME));
+        return SurfaceControl.createDisplay("scrcpy", secure);
     }
 
     private static void configure(MediaCodec codec, MediaFormat format) {

server/src/main/java/com/genymobile/scrcpy/ScreenInfo.java

@@ -82,6 +82,12 @@ public final class ScreenInfo {
 
     public static ScreenInfo computeScreenInfo(DisplayInfo displayInfo, Rect crop, int maxSize, int lockedVideoOrientation) {
         int rotation = displayInfo.getRotation();
+
+        if (lockedVideoOrientation == Device.LOCK_VIDEO_ORIENTATION_INITIAL) {
+            // The user requested to lock the video orientation to the current orientation
+            lockedVideoOrientation = rotation;
+        }
+
         Size deviceSize = displayInfo.getSize();
         Rect contentRect = new Rect(0, 0, deviceSize.getWidth(), deviceSize.getHeight());
         if (crop != null) {

server/src/main/java/com/genymobile/scrcpy/Server.java

@@ -50,7 +50,7 @@ public final class Server {
             }
         }
 
-        CleanUp.configure(mustDisableShowTouchesOnCleanUp, restoreStayOn, true);
+        CleanUp.configure(options.getDisplayId(), restoreStayOn, mustDisableShowTouchesOnCleanUp, true, options.getPowerOffScreenOnClose());
 
         boolean tunnelForward = options.isTunnelForward();
 
@@ -135,7 +135,7 @@ public final class Server {
                     "The server version (" + BuildConfig.VERSION_NAME + ") does not match the client " + "(" + clientVersion + ")");
         }
 
-        final int expectedParameters = 15;
+        final int expectedParameters = 16;
         if (args.length != expectedParameters) {
             throw new IllegalArgumentException("Expecting " + expectedParameters + " parameters");
         }
@@ -185,6 +185,9 @@ public final class Server {
         String encoderName = "-".equals(args[14]) ? null : args[14];
         options.setEncoderName(encoderName);
 
+        boolean powerOffScreenOnClose = Boolean.parseBoolean(args[15]);
+        options.setPowerOffScreenOnClose(powerOffScreenOnClose);
+
         return options;
     }
 
@@ -230,7 +233,7 @@ public final class Server {
             if (encoders != null && encoders.length > 0) {
                 Ln.e("Try to use one of the available encoders:");
                 for (MediaCodecInfo encoder : encoders) {
-                    Ln.e("    scrcpy --encoder-name '" + encoder.getName() + "'");
+                    Ln.e("    scrcpy --encoder '" + encoder.getName() + "'");
                 }
             }
         }

server/src/main/java/com/genymobile/scrcpy/wrappers/ActivityManager.java

@@ -14,7 +14,7 @@ public class ActivityManager {
 
     private final IInterface manager;
     private Method getContentProviderExternalMethod;
-    private boolean getContentProviderExternalMethodLegacy;
+    private boolean getContentProviderExternalMethodNewVersion = true;
     private Method removeContentProviderExternalMethod;
 
     public ActivityManager(IInterface manager) {
@@ -29,7 +29,7 @@ public class ActivityManager {
             } catch (NoSuchMethodException e) {
                 // old version
                 getContentProviderExternalMethod = manager.getClass().getMethod("getContentProviderExternal", String.class, int.class, IBinder.class);
-                getContentProviderExternalMethodLegacy = true;
+                getContentProviderExternalMethodNewVersion = false;
             }
         }
         return getContentProviderExternalMethod;
@@ -46,7 +46,7 @@ public class ActivityManager {
         try {
             Method method = getGetContentProviderExternalMethod();
             Object[] args;
-            if (!getContentProviderExternalMethodLegacy) {
+            if (getContentProviderExternalMethodNewVersion) {
                 // new version
                 args = new Object[]{name, ServiceManager.USER_ID, token, null};
             } else {