Update developer documentation

FAQ.md

@@ -159,8 +159,6 @@ In developer options, enable:
 > **USB debugging (Security settings)**  
 > _Allow granting permissions and simulating input via USB debugging_
 
-Rebooting the device is necessary once this option is set.
-
 [simulating input]: https://github.com/Genymobile/scrcpy/issues/70#issuecomment-373286323
 
 
@@ -170,12 +168,12 @@ The default text injection method is [limited to ASCII characters][text-input].
 A trick allows to also inject some [accented characters][accented-characters],
 but that's all. See [#37].
 
-It is also possible to simulate a [physical keyboard][hid] (HID).
+Since scrcpy v1.20, it is possible to simulate a [physical keyboard][hid] (HID).
 
 [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
-[hid]: doc/hid-otg.md
+[hid]: README.md#physical-keyboard-simulation-hid
 
 
 ## Client issues
@@ -231,4 +229,4 @@ Translations of this FAQ in other languages are available in the [wiki].
 
 [wiki]: https://github.com/Genymobile/scrcpy/wiki
 
-Only this FAQ file is guaranteed to be up-to-date.
+Only this README file is guaranteed to be up-to-date.

README.md

@@ -1,4 +1,4 @@
-# scrcpy (v2.1)
+# scrcpy (v2.0)
 
 <img src="app/data/icon.svg" width="128" height="128" alt="scrcpy" align="right" />
 
@@ -30,7 +30,7 @@ Its features include:
  - mirroring with [Android device screen off](doc/device.md#turn-screen-off)
  - [copy-paste](doc/control.md#copy-paste) in both directions
  - [configurable quality](doc/video.md)
- - Android device screen [as a webcam (V4L2)](doc/v4l2.md) (Linux-only)
+ - Android device [as a webcam (V4L2)](doc/v4l2.md) (Linux-only)
  - [physical keyboard/mouse simulation (HID)](doc/hid-otg.md)
  - [OTG mode](doc/hid-otg.md#otg)
  - and more…
@@ -39,7 +39,7 @@ Its features include:
 
 The Android device requires at least API 21 (Android 5.0).
 
-[Audio forwarding](doc/audio.md) is supported for API >= 30 (Android 11+).
+[Audio forwarding](doc/audio.md) is supported from API 30 (Android 11).
 
 Make sure you [enabled USB debugging][enable-adb] on your device(s).
 
@@ -47,14 +47,10 @@ Make sure you [enabled USB debugging][enable-adb] on your device(s).
 
 On some devices, you also need to enable [an additional option][control] `USB
 debugging (Security Settings)` (this is an item different from `USB debugging`)
-to control it using a keyboard and mouse. Rebooting the device is necessary once
+to control it using a keyboard and mouse.
-this option is set.
 
 [control]: https://github.com/Genymobile/scrcpy/issues/70#issuecomment-373286323
 
-Note that USB debugging is not required to run scrcpy in [OTG
-mode](doc/hid-otg.md#otg).
-
 
 ## Get the app
 
@@ -117,10 +113,7 @@ For general questions or discussions, you can also use:
 I'm [@rom1v](https://github.com/rom1v), the author and maintainer of _scrcpy_.
 
 If you appreciate this application, you can [support my open source
-work][donate]:
+work][donate].
- - [GitHub Sponsors](https://github.com/sponsors/rom1v)
- - [Liberapay](https://liberapay.com/rom1v/)
- - [PayPal](https://paypal.me/rom2v)
 
 [donate]: https://blog.rom1v.com/about/#support-my-open-source-work
 

app/prebuilt-deps/prepare-adb.sh

@@ -6,10 +6,10 @@ cd "$DIR"
 mkdir -p "$PREBUILT_DATA_DIR"
 cd "$PREBUILT_DATA_DIR"
 
-DEP_DIR=platform-tools-34.0.3
+DEP_DIR=platform-tools-34.0.1
 
-FILENAME=platform-tools_r34.0.3-windows.zip
+FILENAME=platform-tools_r34.0.1-windows.zip
-SHA256SUM=fce992e93eb786fc9f47df93d83a7b912c46742d45c39d712c02e06d05b72e2b
+SHA256SUM=5dd9c2be744c224fa3a7cbe30ba02d2cb378c763bd0f797a7e47e9f3156a5daa
 
 if [[ -d "$DEP_DIR" ]]
 then

app/scrcpy-windows.rc

@@ -13,7 +13,7 @@ BEGIN
       VALUE "LegalCopyright", "Romain Vimont, Genymobile"
       VALUE "OriginalFilename", "scrcpy.exe"
       VALUE "ProductName", "scrcpy"
-      VALUE "ProductVersion", "2.1.1"
+      VALUE "ProductVersion", "2.0"
     END
   END
   BLOCK "VarFileInfo"

app/scrcpy.1

@@ -21,7 +21,7 @@ Make scrcpy window always on top (above other windows).
 
 .TP
 .BI "\-\-audio\-bit\-rate " value
-Encode the audio at the given bit rate, expressed in bits/s. Unit suffixes are supported: '\fBK\fR' (x1000) and '\fBM\fR' (x1000000).
+Encode the audio at the given bit\-rate, expressed in bits/s. Unit suffixes are supported: '\fBK\fR' (x1000) and '\fBM\fR' (x1000000).
 
 Default is 128K (128000).
 
@@ -71,7 +71,7 @@ Default is 5.
 
 .TP
 .BI "\-b, \-\-video\-bit\-rate " value
-Encode the video at the given bit rate, expressed in bits/s. Unit suffixes are supported: '\fBK\fR' (x1000) and '\fBM\fR' (x1000000).
+Encode the video at the given bit\-rate, expressed in bits/s. Unit suffixes are supported: '\fBK\fR' (x1000) and '\fBM\fR' (x1000000).
 
 Default is 8M (8000000).
 

app/src/adb/adb.c

@@ -628,8 +628,8 @@ sc_adb_select_device(struct sc_intr *intr,
         return false;
     }
 
-    LOGI("ADB device found:");
+    LOGD("ADB device found:");
-    sc_adb_devices_log(SC_LOG_LEVEL_INFO, vec.data, vec.size);
+    sc_adb_devices_log(SC_LOG_LEVEL_DEBUG, vec.data, vec.size);
 
     // Move devics into out_device (do not destroy device)
     sc_adb_device_move(out_device, device);

app/src/cli.c

@@ -124,7 +124,7 @@ static const struct sc_option options[] = {
         .longopt_id = OPT_AUDIO_BIT_RATE,
         .longopt = "audio-bit-rate",
         .argdesc = "value",
-        .text = "Encode the audio at the given bit rate, expressed in bits/s. "
+        .text = "Encode the audio at the given bit-rate, expressed in bits/s. "
                 "Unit suffixes are supported: 'K' (x1000) and 'M' (x1000000).\n"
                 "Default is 128K (128000).",
     },
@@ -185,7 +185,7 @@ static const struct sc_option options[] = {
         .shortopt = 'b',
         .longopt = "video-bit-rate",
         .argdesc = "value",
-        .text = "Encode the video at the given bit rate, expressed in bits/s. "
+        .text = "Encode the video at the given bit-rate, expressed in bits/s. "
                 "Unit suffixes are supported: 'K' (x1000) and 'M' (x1000000).\n"
                 "Default is 8M (8000000).",
     },

app/src/screen.c

@@ -488,7 +488,6 @@ sc_screen_show_initial_window(struct sc_screen *screen) {
     }
 
     SDL_ShowWindow(screen->window);
-    sc_screen_update_content_rect(screen);
 }
 
 void
@@ -849,8 +848,6 @@ sc_screen_convert_drawable_to_frame_coords(struct sc_screen *screen,
     int32_t w = screen->content_size.width;
     int32_t h = screen->content_size.height;
 
-    // screen->rect must be initialized to avoid a division by zero
-    assert(screen->rect.w && screen->rect.h);
 
     x = (int64_t) (x - screen->rect.x) * w / screen->rect.w;
     y = (int64_t) (y - screen->rect.y) * h / screen->rect.h;

app/src/server.c

@@ -533,8 +533,8 @@ sc_server_connect_to(struct sc_server *server, struct sc_server_info *info) {
                 if (audio_socket == SC_SOCKET_NONE) {
                     goto fail;
                 }
-                bool ok = net_connect_intr(&server->intr, audio_socket,
+                bool ok = net_connect_intr(&server->intr, audio_socket, tunnel_host,
-                                           tunnel_host, tunnel_port);
+                                           tunnel_port);
                 if (!ok) {
                     goto fail;
                 }

app/src/usb/scrcpy_otg.c

@@ -105,6 +105,10 @@ scrcpy_otg(struct scrcpy_options *options) {
 
     usb_device_initialized = true;
 
+    LOGI("USB device: %s (%04x:%04x) %s %s", usb_device.serial,
+         (unsigned) usb_device.vid, (unsigned) usb_device.pid,
+         usb_device.manufacturer, usb_device.product);
+
     ok = sc_usb_connect(&s->usb, usb_device.device, &cbs, NULL);
     if (!ok) {
         goto end;

app/src/usb/usb.c

@@ -213,8 +213,8 @@ sc_usb_select_device(struct sc_usb *usb, const char *serial,
     assert(sel_count == 1); // sel_idx is valid only if sel_count == 1
     struct sc_usb_device *device = &vec.data[sel_idx];
 
-    LOGI("USB device found:");
+    LOGD("USB device found:");
-    sc_usb_devices_log(SC_LOG_LEVEL_INFO, vec.data, vec.size);
+    sc_usb_devices_log(SC_LOG_LEVEL_DEBUG, vec.data, vec.size);
 
     // Move device into out_device (do not destroy device)
     sc_usb_device_move(out_device, device);

doc/audio.md

@@ -71,13 +71,6 @@ scrcpy --audio-codec=aac
 scrcpy --audio-codec=raw
 ```
 
-In particular, if you get the following error:
-
-> Failed to initialize audio/opus, error 0xfffffffe
-
-then your device has no Opus encoder: try `scrcpy --audio-codec=aac`.
-
-
 Several encoders may be available on the device. They can be listed by:
 
 ```bash
@@ -98,7 +91,7 @@ check `--audio-codec-options` in the manpage or in `scrcpy --help`.
 
 ## Bit rate
 
-The default audio bit rate is 128Kbps. To change it:
+The default video bit-rate is 128Kbps. To change it:
 
 ```bash
 scrcpy --audio-bit-rate=64K

doc/build.md

@@ -77,7 +77,7 @@ pip3 install meson
 sudo dnf install https://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-$(rpm -E %fedora).noarch.rpm
 
 # client build dependencies
-sudo dnf install SDL2-devel ffms2-devel libusb1-devel meson gcc make
+sudo dnf install SDL2-devel ffms2-devel libusb-devel meson gcc make
 
 # server build dependencies
 sudo dnf install java-devel
@@ -233,10 +233,10 @@ install` must be run as root)._
 
 #### Option 2: Use prebuilt server
 
- - [`scrcpy-server-v2.1`][direct-scrcpy-server]  
+ - [`scrcpy-server-v2.0`][direct-scrcpy-server]  
-   <sub>SHA-256: `5b8bf1940264b930c71a1c614c57da2247f52b2d4240bca865cc6d366dff6688`</sub>
+   <sub>SHA-256: `9e241615f578cd690bb43311000debdecf6a9c50a7082b001952f18f6f21ddc2`</sub>
 
-[direct-scrcpy-server]: https://github.com/Genymobile/scrcpy/releases/download/v2.1/scrcpy-server-v2.1
+[direct-scrcpy-server]: https://github.com/Genymobile/scrcpy/releases/download/v2.0/scrcpy-server-v2.0
 
 Download the prebuilt server somewhere, and specify its path during the Meson
 configuration:

doc/develop.md

@@ -359,7 +359,7 @@ metadata]:
    - the initial video width (`u32`)
    - the initial video height (`u32`)
  - On the _audio_ socket, 4 bytes:
-   - the codec id (`u32`) (OPUS, AAC or RAW)
+   - the codec id ('u32`) (OPUS, AAC or RAW)
 
 [codec metadata]: https://github.com/Genymobile/scrcpy/blob/a3cdf1a6b86ea22786e1f7d09b9c202feabc6949/server/src/main/java/com/genymobile/scrcpy/Streamer.java#L33-L51
 

doc/hid-otg.md

@@ -106,7 +106,3 @@ scrcpy --otg                             # keyboard and mouse
 
 Like `--hid-keyboard` and `--hid-mouse`, it only works if the device is
 connected over USB.
-
-## HID/OTG issues on Windows
-
-See [FAQ](/FAQ.md#hidotg-issues-on-windows).

doc/linux.md

@@ -9,10 +9,12 @@ Scrcpy is packaged in several distributions and package managers:
  - Debian/Ubuntu: `apt install scrcpy`
  - Arch Linux: `pacman -S scrcpy`
  - Fedora: `dnf copr enable zeno/scrcpy && dnf install scrcpy`
- - Gentoo: `emerge scrcpy`
+ - Gentoo: [ebuild][ebuild-link] file
  - Snap: `snap install scrcpy`
  - … (see [repology](https://repology.org/project/scrcpy/versions))
 
+[ebuild-link]: https://github.com/maggu2810/maggu2810-overlay/tree/master/app-mobilephone/scrcpy
+
 ### Latest version
 
 However, the packaged version is not always the latest release. To install the

doc/shortcuts.md

@@ -29,7 +29,7 @@ _<kbd>[Super]</kbd> is typically the <kbd>Windows</kbd> or <kbd>Cmd</kbd> key._
  | 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-left-click¹_
  | Click on `HOME`                             | <kbd>MOD</kbd>+<kbd>h</kbd> \| _Middle-click_
- | Click on `BACK`                             | <kbd>MOD</kbd>+<kbd>b</kbd> \| <kbd>MOD</kbd>+<kbd>Backspace</kbd> \| _Right-click²_
+ | Click on `BACK`                             | <kbd>MOD</kbd>+<kbd>b</kbd> \| _Right-click²_
  | Click on `APP_SWITCH`                       | <kbd>MOD</kbd>+<kbd>s</kbd> \| _4th-click³_
  | Click on `MENU` (unlock screen)⁴            | <kbd>MOD</kbd>+<kbd>m</kbd>
  | Click on `VOLUME_UP`                        | <kbd>MOD</kbd>+<kbd>↑</kbd> _(up)_

doc/video.md

@@ -21,7 +21,7 @@ If encoding fails, scrcpy automatically tries again with a lower definition
 
 ## Bit rate
 
-The default video bit rate is 8 Mbps. To change it:
+The default video bit-rate is 8 Mbps. To change it:
 
 ```bash
 scrcpy --video-bit-rate=2M

doc/windows.md

@@ -4,24 +4,18 @@
 
 Download the [latest release]:
 
- - [`scrcpy-win64-v2.1.zip`][direct-win64] (64-bit)  
+ - [`scrcpy-win64-v2.0.zip`][direct-win64] (64-bit)  
-   <sub>SHA-256: `57b98813322c8b5b560ada68714a2cd7b7efe64086fa61d03e389c23212c803d`</sub>
+   <sub>SHA-256: `ae4c8d37a496b43f8974ba8f07f708e22a9570ba0cddc3dc3a36edbccd4d2a20`</sub>
- - [`scrcpy-win32-v2.1.zip`][direct-win32] (32-bit)  
+ - [`scrcpy-win32-v2.0.zip`][direct-win32] (32-bit)  
-   <sub>SHA-256: `4d261d391a60ea975440d83cdc22f8250b3c8985f2ece8c7e53d6fb26c0d74ed`</sub>
+   <sub>SHA-256: `15d98c02cb0e0bbd84f8b5d54991e0f6925569b1286a86a40743944fcb1c2d8c`</sub>
 
 [latest release]: https://github.com/Genymobile/scrcpy/releases/latest
-[direct-win64]: https://github.com/Genymobile/scrcpy/releases/download/v2.1/scrcpy-win64-v2.1.zip
+[direct-win64]: https://github.com/Genymobile/scrcpy/releases/download/v2.0/scrcpy-win64-v2.0.zip
-[direct-win32]: https://github.com/Genymobile/scrcpy/releases/download/v2.1/scrcpy-win32-v2.1.zip
+[direct-win32]: https://github.com/Genymobile/scrcpy/releases/download/v2.0/scrcpy-win32-v2.0.zip
 
 and extract it.
 
-Alternatively, you could install it from packages manager, like [Winget]:
+Alternatively, you could install it from packages manager, like [Chocolatey]:
-
-```bash
-winget install scrcpy
-```
-
-or [Chocolatey]:
 
 ```bash
 choco install scrcpy
@@ -36,7 +30,6 @@ scoop install scrcpy
 scoop install adb    # if you don't have it yet
 ```
 
-[Winget]: https://github.com/microsoft/winget-cli
 [Chocolatey]: https://chocolatey.org/
 [Scoop]: https://scoop.sh
 

install_release.sh

@@ -2,8 +2,8 @@
 set -e
 
 BUILDDIR=build-auto
-PREBUILT_SERVER_URL=https://github.com/Genymobile/scrcpy/releases/download/v2.1/scrcpy-server-v2.1
+PREBUILT_SERVER_URL=https://github.com/Genymobile/scrcpy/releases/download/v2.0/scrcpy-server-v2.0
-PREBUILT_SERVER_SHA256=5b8bf1940264b930c71a1c614c57da2247f52b2d4240bca865cc6d366dff6688
+PREBUILT_SERVER_SHA256=9e241615f578cd690bb43311000debdecf6a9c50a7082b001952f18f6f21ddc2
 
 echo "[scrcpy] Downloading prebuilt server..."
 wget "$PREBUILT_SERVER_URL" -O scrcpy-server

meson.build

@@ -1,5 +1,5 @@
 project('scrcpy', 'c',
-        version: '2.1.1',
+        version: '2.0',
         meson_version: '>= 0.48',
         default_options: [
             'c_std=c11',

release.mk

@@ -98,9 +98,9 @@ dist-win32: build-server build-win32
 	cp app/prebuilt-deps/data/ffmpeg-6.0-scrcpy-4/win32/bin/avcodec-60.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
 	cp app/prebuilt-deps/data/ffmpeg-6.0-scrcpy-4/win32/bin/avformat-60.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
 	cp app/prebuilt-deps/data/ffmpeg-6.0-scrcpy-4/win32/bin/swresample-4.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
-	cp app/prebuilt-deps/data/platform-tools-34.0.3/adb.exe "$(DIST)/$(WIN32_TARGET_DIR)/"
+	cp app/prebuilt-deps/data/platform-tools-34.0.1/adb.exe "$(DIST)/$(WIN32_TARGET_DIR)/"
-	cp app/prebuilt-deps/data/platform-tools-34.0.3/AdbWinApi.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
+	cp app/prebuilt-deps/data/platform-tools-34.0.1/AdbWinApi.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
-	cp app/prebuilt-deps/data/platform-tools-34.0.3/AdbWinUsbApi.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
+	cp app/prebuilt-deps/data/platform-tools-34.0.1/AdbWinUsbApi.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
 	cp app/prebuilt-deps/data/SDL2-2.28.0/i686-w64-mingw32/bin/SDL2.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
 	cp app/prebuilt-deps/data/libusb-1.0.26/libusb-MinGW-Win32/bin/msys-usb-1.0.dll "$(DIST)/$(WIN32_TARGET_DIR)/"
 
@@ -116,9 +116,9 @@ dist-win64: build-server build-win64
 	cp app/prebuilt-deps/data/ffmpeg-6.0-scrcpy-4/win64/bin/avcodec-60.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
 	cp app/prebuilt-deps/data/ffmpeg-6.0-scrcpy-4/win64/bin/avformat-60.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
 	cp app/prebuilt-deps/data/ffmpeg-6.0-scrcpy-4/win64/bin/swresample-4.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp app/prebuilt-deps/data/platform-tools-34.0.3/adb.exe "$(DIST)/$(WIN64_TARGET_DIR)/"
+	cp app/prebuilt-deps/data/platform-tools-34.0.1/adb.exe "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp app/prebuilt-deps/data/platform-tools-34.0.3/AdbWinApi.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
+	cp app/prebuilt-deps/data/platform-tools-34.0.1/AdbWinApi.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
-	cp app/prebuilt-deps/data/platform-tools-34.0.3/AdbWinUsbApi.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
+	cp app/prebuilt-deps/data/platform-tools-34.0.1/AdbWinUsbApi.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
 	cp app/prebuilt-deps/data/SDL2-2.28.0/x86_64-w64-mingw32/bin/SDL2.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
 	cp app/prebuilt-deps/data/libusb-1.0.26/libusb-MinGW-x64/bin/msys-usb-1.0.dll "$(DIST)/$(WIN64_TARGET_DIR)/"
 

server/build.gradle

@@ -7,8 +7,8 @@ android {
         applicationId "com.genymobile.scrcpy"
         minSdkVersion 21
         targetSdkVersion 33
-        versionCode 20101
+        versionCode 20000
-        versionName "2.1.1"
+        versionName "2.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
     buildTypes {

server/build_without_gradle.sh

@@ -12,7 +12,7 @@
 set -e
 
 SCRCPY_DEBUG=false
-SCRCPY_VERSION_NAME=2.1.1
+SCRCPY_VERSION_NAME=2.0
 
 PLATFORM=${ANDROID_PLATFORM:-33}
 BUILD_TOOLS=${ANDROID_BUILD_TOOLS:-33.0.0}
@@ -48,7 +48,6 @@ cd "$SERVER_DIR/src/main/aidl"
 "$BUILD_TOOLS_DIR/aidl" -o"$GEN_DIR" android/view/IRotationWatcher.aidl
 "$BUILD_TOOLS_DIR/aidl" -o"$GEN_DIR" \
     android/content/IOnPrimaryClipChangedListener.aidl
-"$BUILD_TOOLS_DIR/aidl" -o"$GEN_DIR" android/view/IDisplayFoldListener.aidl
 
 echo "Compiling java sources..."
 cd ../java

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

@@ -118,7 +118,7 @@ public final class AudioCapture {
         if (Build.VERSION.SDK_INT == Build.VERSION_CODES.R) {
             startWorkaroundAndroid11();
             try {
-                tryStartRecording(5, 100);
+                tryStartRecording(3, 100);
             } finally {
                 stopWorkaroundAndroid11();
             }

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

@@ -64,6 +64,8 @@ public final class DesktopConnection implements Closeable {
             throws IOException {
         String socketName = getSocketName(scid);
 
+        LocalSocket firstSocket = null;
+
         LocalSocket videoSocket = null;
         LocalSocket audioSocket = null;
         LocalSocket controlSocket = null;
@@ -72,28 +74,24 @@ public final class DesktopConnection implements Closeable {
                 try (LocalServerSocket localServerSocket = new LocalServerSocket(socketName)) {
                     if (video) {
                         videoSocket = localServerSocket.accept();
-                        if (sendDummyByte) {
+                        firstSocket = videoSocket;
-                            // send one byte so the client may read() to detect a connection error
-                            videoSocket.getOutputStream().write(0);
-                            sendDummyByte = false;
-                        }
                     }
                     if (audio) {
                         audioSocket = localServerSocket.accept();
-                        if (sendDummyByte) {
+                        if (firstSocket == null) {
-                            // send one byte so the client may read() to detect a connection error
+                            firstSocket = audioSocket;
-                            audioSocket.getOutputStream().write(0);
-                            sendDummyByte = false;
                         }
                     }
                     if (control) {
                         controlSocket = localServerSocket.accept();
-                        if (sendDummyByte) {
+                        if (firstSocket == null) {
-                            // send one byte so the client may read() to detect a connection error
+                            firstSocket = controlSocket;
-                            controlSocket.getOutputStream().write(0);
-                            sendDummyByte = false;
                         }
                     }
+                    if (sendDummyByte) {
+                        // send one byte so the client may read() to detect a connection error
+                        firstSocket.getOutputStream().write(0);
+                    }
                 }
             } else {
                 if (video) {

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

@@ -99,32 +99,25 @@ public final class Device {
             }
         }, displayId);
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+        ServiceManager.getWindowManager().registerDisplayFoldListener(new IDisplayFoldListener.Stub() {
-            ServiceManager.getWindowManager().registerDisplayFoldListener(new IDisplayFoldListener.Stub() {
+            @Override
-                @Override
+            public void onDisplayFoldChanged(int displayId, boolean folded) {
-                public void onDisplayFoldChanged(int displayId, boolean folded) {
+                synchronized (Device.this) {
-                    if (Device.this.displayId != displayId) {
+                    DisplayInfo displayInfo = ServiceManager.getDisplayManager().getDisplayInfo(displayId);
-                        // Ignore events related to other display ids
+                    if (displayInfo == null) {
+                        Ln.e("Display " + displayId + " not found\n" + LogUtils.buildDisplayListMessage());
                         return;
                     }
 
-                    synchronized (Device.this) {
+                    screenInfo = ScreenInfo.computeScreenInfo(displayInfo.getRotation(), displayInfo.getSize(), options.getCrop(),
-                        DisplayInfo displayInfo = ServiceManager.getDisplayManager().getDisplayInfo(displayId);
+                            options.getMaxSize(), options.getLockVideoOrientation());
-                        if (displayInfo == null) {
+                    // notify
-                            Ln.e("Display " + displayId + " not found\n" + LogUtils.buildDisplayListMessage());
+                    if (foldListener != null) {
-                            return;
+                        foldListener.onFoldChanged(displayId, folded);
-                        }
-
-                        screenInfo = ScreenInfo.computeScreenInfo(displayInfo.getRotation(), displayInfo.getSize(), options.getCrop(),
-                                options.getMaxSize(), options.getLockVideoOrientation());
-                        // notify
-                        if (foldListener != null) {
-                            foldListener.onFoldChanged(displayId, folded);
-                        }
                     }
                 }
-            });
+            }
-        }
+        });
 
         if (options.getControl() && options.getClipboardAutosync()) {
             // If control and autosync are enabled, synchronize Android clipboard to the computer automatically

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

@@ -8,7 +8,6 @@ import android.media.MediaCodecInfo;
 import android.media.MediaFormat;
 import android.os.Build;
 import android.os.IBinder;
-import android.os.Looper;
 import android.os.SystemClock;
 import android.view.Surface;
 
@@ -148,6 +147,7 @@ public class ScreenEncoder implements Device.RotationListener, Device.FoldListen
         // Downsizing on error is only enabled if an encoding failure occurs before the first frame (downsizing later could be surprising)
 
         int newMaxSize = chooseMaxSizeFallback(screenInfo.getVideoSize());
+        Ln.i("newMaxSize = " + newMaxSize);
         if (newMaxSize == 0) {
             // Must definitively fail
             return false;
@@ -286,10 +286,6 @@ public class ScreenEncoder implements Device.RotationListener, Device.FoldListen
     @Override
     public void start(TerminationListener listener) {
         thread = new Thread(() -> {
-            // Some devices (Meizu) deadlock if the video encoding thread has no Looper
-            // <https://github.com/Genymobile/scrcpy/issues/4143>
-            Looper.prepare();
-
             try {
                 streamScreen();
             } catch (ConfigurationException e) {

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

@@ -2,7 +2,6 @@ package com.genymobile.scrcpy.wrappers;
 
 import com.genymobile.scrcpy.Ln;
 
-import android.annotation.TargetApi;
 import android.os.IInterface;
 import android.view.IRotationWatcher;
 import android.view.IDisplayFoldListener;
@@ -107,17 +106,16 @@ public final class WindowManager {
                 cls.getMethod("watchRotation", IRotationWatcher.class).invoke(manager, rotationWatcher);
             }
         } catch (Exception e) {
-            Ln.e("Could not register rotation watcher", e);
+            throw new AssertionError(e);
         }
     }
 
-    @TargetApi(29)
     public void registerDisplayFoldListener(IDisplayFoldListener foldListener) {
         try {
             Class<?> cls = manager.getClass();
             cls.getMethod("registerDisplayFoldListener", IDisplayFoldListener.class).invoke(manager, foldListener);
         } catch (Exception e) {
-            Ln.e("Could not register display fold listener", e);
+            throw new AssertionError(e);
         }
     }
 }