Rename --display-buffer to --video-buffer

For consistency with --audio-buffer, rename --display-buffer to
--video-buffer.

Fixes #5403 <https://github.com/Genymobile/scrcpy/issues/5403>
PR #5420 <https://github.com/Genymobile/scrcpy/pull/5420>

app/data/bash-completion/scrcpy

@@ -20,7 +20,6 @@ _scrcpy() {
         --crop=
         -d --select-usb
         --disable-screensaver
-        --display-buffer=
         --display-id=
         --display-orientation=
         -e --select-tcpip
@@ -90,6 +89,7 @@ _scrcpy() {
         --v4l2-sink=
         -v --version
         -V --verbosity=
+        --video-buffer=
         --video-codec=
         --video-codec-options=
         --video-encoder=
@@ -191,7 +191,6 @@ _scrcpy() {
         |--camera-size \
         |--crop \
         |--display-id \
-        |--display-buffer \
         |--max-fps \
         |-m|--max-size \
         |-p|--port \
@@ -201,6 +200,7 @@ _scrcpy() {
         |--tunnel-port \
         |--v4l2-buffer \
         |--v4l2-sink \
+        |--video-buffer \
         |--video-codec-options \
         |--video-encoder \
         |--tcpip \

app/data/zsh-completion/_scrcpy

@@ -27,7 +27,6 @@ arguments=(
     '--crop=[\[width\:height\:x\:y\] Crop the device screen on the server]'
     {-d,--select-usb}'[Use USB device]'
     '--disable-screensaver[Disable screensaver while scrcpy is running]'
-    '--display-buffer=[Add a buffering delay \(in milliseconds\) before displaying]'
     '--display-id=[Specify the display id to mirror]'
     '--display-orientation=[Set the initial display orientation]:orientation values:(0 90 180 270 flip0 flip90 flip180 flip270)'
     {-e,--select-tcpip}'[Use TCP/IP device]'
@@ -92,6 +91,7 @@ arguments=(
     '--v4l2-sink=[\[\/dev\/videoN\] Output to v4l2loopback device]'
     {-v,--version}'[Print the version of scrcpy]'
     {-V,--verbosity=}'[Set the log level]:verbosity:(verbose debug info warn error)'
+    '--video-buffer=[Add a buffering delay \(in milliseconds\) before displaying video frames]'
     '--video-codec=[Select the video codec]:codec:(h264 h265 av1)'
     '--video-codec-options=[Set a list of comma-separated key\:type=value options for the device video encoder]'
     '--video-encoder=[Use a specific MediaCodec video encoder]'

app/scrcpy.1

@@ -139,12 +139,6 @@ Also see \fB\-e\fR (\fB\-\-select\-tcpip\fR).
 .BI "\-\-disable\-screensaver"
 Disable screensaver while scrcpy is running.
 
-.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 "\-\-display\-id " id
 Specify the device display id to mirror.
@@ -560,7 +554,15 @@ It requires to lock the video orientation (see \fB\-\-lock\-video\-orientation\f
 .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.
+This option is similar to \fB\-\-video\-buffer\fR, but specific to V4L2 sink.
+
+Default is 0 (no buffering).
+
+.TP
+.BI "\-\-video\-buffer " ms
+Add a buffering delay (in milliseconds) before displaying video frames.
+
+This increases latency to compensate for jitter.
 
 Default is 0 (no buffering).
 

app/src/cli.c

@@ -50,6 +50,7 @@ enum {
     OPT_POWER_OFF_ON_CLOSE,
     OPT_V4L2_SINK,
     OPT_DISPLAY_BUFFER,
+    OPT_VIDEO_BUFFER,
     OPT_V4L2_BUFFER,
     OPT_TUNNEL_HOST,
     OPT_TUNNEL_PORT,
@@ -321,12 +322,10 @@ static const struct sc_option options[] = {
         .argdesc = "id",
     },
     {
+        // deprecated
         .longopt_id = OPT_DISPLAY_BUFFER,
         .longopt = "display-buffer",
         .argdesc = "ms",
-        .text = "Add a buffering delay (in milliseconds) before displaying. "
-                "This increases latency to compensate for jitter.\n"
-                "Default is 0 (no buffering).",
     },
     {
         .longopt_id = OPT_DISPLAY_ID,
@@ -898,11 +897,20 @@ static const struct sc_option options[] = {
         .argdesc = "ms",
         .text = "Add a buffering delay (in milliseconds) before pushing "
                 "frames. This increases latency to compensate for jitter.\n"
-                "This option is similar to --display-buffer, but specific to "
+                "This option is similar to --video-buffer, but specific to "
                 "V4L2 sink.\n"
                 "Default is 0 (no buffering).\n"
                 "This option is only available on Linux.",
     },
+    {
+        .longopt_id = OPT_VIDEO_BUFFER,
+        .longopt = "video-buffer",
+        .argdesc = "ms",
+        .text = "Add a buffering delay (in milliseconds) before displaying "
+                "video frames.\n"
+                "This increases latency to compensate for jitter.\n"
+                "Default is 0 (no buffering).",
+    },
     {
         .longopt_id = OPT_VIDEO_CODEC,
         .longopt = "video-codec",
@@ -2549,7 +2557,11 @@ parse_args_with_getopt(struct scrcpy_cli_args *args, int argc, char *argv[],
                 opts->power_off_on_close = true;
                 break;
             case OPT_DISPLAY_BUFFER:
-                if (!parse_buffering_time(optarg, &opts->display_buffer)) {
+                LOGW("--display-buffer is deprecated, use --video-buffer "
+                     "instead.");
+                // fall through
+            case OPT_VIDEO_BUFFER:
+                if (!parse_buffering_time(optarg, &opts->video_buffer)) {
                     return false;
                 }
                 break;

app/src/options.c

@@ -58,7 +58,7 @@ const struct scrcpy_options scrcpy_options_default = {
     .window_width = 0,
     .window_height = 0,
     .display_id = 0,
-    .display_buffer = 0,
+    .video_buffer = 0,
     .audio_buffer = -1, // depends on the audio format,
     .audio_output_buffer = SC_TICK_FROM_MS(5),
     .time_limit = 0,

app/src/options.h

@@ -261,7 +261,7 @@ struct scrcpy_options {
     uint16_t window_width;
     uint16_t window_height;
     uint32_t display_id;
-    sc_tick display_buffer;
+    sc_tick video_buffer;
     sc_tick audio_buffer;
     sc_tick audio_output_buffer;
     sc_tick time_limit;

app/src/scrcpy.c

@@ -53,7 +53,7 @@ struct scrcpy {
     struct sc_decoder video_decoder;
     struct sc_decoder audio_decoder;
     struct sc_recorder recorder;
-    struct sc_delay_buffer display_buffer;
+    struct sc_delay_buffer video_buffer;
 #ifdef HAVE_V4L2
     struct sc_v4l2_sink v4l2_sink;
     struct sc_delay_buffer v4l2_buffer;
@@ -815,11 +815,11 @@ aoa_complete:
 
         if (options->video_playback) {
             struct sc_frame_source *src = &s->video_decoder.frame_source;
-            if (options->display_buffer) {
+            if (options->video_buffer) {
-                sc_delay_buffer_init(&s->display_buffer,
+                sc_delay_buffer_init(&s->video_buffer,
-                                     options->display_buffer, true);
+                                     options->video_buffer, true);
-                sc_frame_source_add_sink(src, &s->display_buffer.frame_sink);
+                sc_frame_source_add_sink(src, &s->video_buffer.frame_sink);
-                src = &s->display_buffer.frame_source;
+                src = &s->video_buffer.frame_source;
             }
 
             sc_frame_source_add_sink(src, &s->screen.frame_sink);

doc/audio.md

@@ -170,7 +170,7 @@ latency (for both [video](video.md#buffering) and audio) might be preferable to
 avoid glitches and smooth the playback:
 
 ```
-scrcpy --display-buffer=200 --audio-buffer=200
+scrcpy --video-buffer=200 --audio-buffer=200
 ```
 
 It is also possible to configure another audio buffer (the audio output buffer),

doc/develop.md

@@ -21,9 +21,9 @@ the client and on the server.
 If video is enabled, then the server sends a raw video stream (H.264 by default)
 of the device screen, with some additional headers for each packet. The client
 decodes the video frames, and displays them as soon as possible, without
-buffering (unless `--display-buffer=delay` is specified) to minimize latency.
+buffering (unless `--video-buffer=delay` is specified) to minimize latency. The
-The client is not aware of the device rotation (which is handled by the server),
+client is not aware of the device rotation (which is handled by the server), it
-it just knows the dimensions of the video frames it receives.
+just knows the dimensions of the video frames it receives.
 
 Similarly, if audio is enabled, then the server sends a raw audio stream (OPUS
 by default) of the device audio output (or the microphone if

doc/video.md

@@ -189,15 +189,15 @@ The configuration is available independently for the display,
 [v4l2 sinks](video.md#video4linux) and [audio](audio.md#buffering) playback.
 
 ```bash
-scrcpy --display-buffer=50   # add 50ms buffering for display
+scrcpy --video-buffer=50     # add 50ms buffering for video playback
-scrcpy --v4l2-buffer=300     # add 300ms buffering for v4l2 sink
 scrcpy --audio-buffer=200    # set 200ms buffering for audio playback
+scrcpy --v4l2-buffer=300     # add 300ms buffering for v4l2 sink
 ```
 
 They can be applied simultaneously:
 
 ```bash
-scrcpy --display-buffer=50 --v4l2-buffer=300
+scrcpy --video-buffer=50 --v4l2-buffer=300
 ```