Add --audio-bit-rate option

Add an option to configure the audio bit-rate.

app/scrcpy.1

@@ -19,6 +19,12 @@ provides display and control of Android devices connected on USB (or over TCP/IP
 .B \-\-always\-on\-top
 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).
+
+Default is 196K (196000).
+
 .TP
 .BI "\-b, \-\-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).

app/src/cli.c

@@ -59,6 +59,7 @@
 #define OPT_NO_POWER_ON            1039
 #define OPT_CODEC                  1040
 #define OPT_NO_AUDIO               1041
+#define OPT_AUDIO_BIT_RATE         1042
 
 struct sc_option {
     char shortopt;
@@ -99,6 +100,14 @@ static const struct sc_option options[] = {
         .longopt = "always-on-top",
         .text = "Make scrcpy window always on top (above other windows).",
     },
+    {
+        .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. "
+                "Unit suffixes are supported: 'K' (x1000) and 'M' (x1000000).\n"
+                "Default is 196K (196000).",
+    },
     {
         .shortopt = 'b',
         .longopt = "bit-rate",
@@ -1424,6 +1433,11 @@ parse_args_with_getopt(struct scrcpy_cli_args *args, int argc, char *argv[],
                     return false;
                 }
                 break;
+            case OPT_AUDIO_BIT_RATE:
+                if (!parse_bit_rate(optarg, &opts->audio_bit_rate)) {
+                    return false;
+                }
+                break;
             case OPT_CROP:
                 opts->crop = optarg;
                 break;

app/src/options.c

@@ -28,6 +28,7 @@ const struct scrcpy_options scrcpy_options_default = {
     },
     .max_size = 0,
     .bit_rate = 0,
+    .audio_bit_rate = 0,
     .max_fps = 0,
     .lock_video_orientation = SC_LOCK_VIDEO_ORIENTATION_UNLOCKED,
     .rotation = 0,

app/src/options.h

@@ -109,6 +109,7 @@ struct scrcpy_options {
     struct sc_shortcut_mods shortcut_mods;
     uint16_t max_size;
     uint32_t bit_rate;
+    uint32_t audio_bit_rate;
     uint16_t max_fps;
     enum sc_lock_video_orientation lock_video_orientation;
     uint8_t rotation;

app/src/scrcpy.c

@@ -357,6 +357,7 @@ scrcpy(struct scrcpy_options *options) {
         .tunnel_port = options->tunnel_port,
         .max_size = options->max_size,
         .bit_rate = options->bit_rate,
+        .audio_bit_rate = options->audio_bit_rate,
         .max_fps = options->max_fps,
         .lock_video_orientation = options->lock_video_orientation,
         .control = options->control,

app/src/server.c

@@ -221,6 +221,8 @@ execute_server(struct sc_server *server,
     }
     if (!params->audio) {
         ADD_PARAM("audio=false");
+    } else if (params->audio_bit_rate) {
+        ADD_PARAM("audio_bit_rate=%" PRIu32, params->audio_bit_rate);
     }
     if (params->codec != SC_CODEC_H264) {
         ADD_PARAM("codec=%s", sc_server_get_codec_name(params->codec));

app/src/server.h

@@ -34,6 +34,7 @@ struct sc_server_params {
     uint16_t tunnel_port;
     uint16_t max_size;
     uint32_t bit_rate;
+    uint32_t audio_bit_rate;
     uint16_t max_fps;
     int8_t lock_video_orientation;
     bool control;