Add --no-audio option

Audio will be enabled by default (when supported). Add an option to
disable it.

Co-authored-by: Romain Vimont <rom@rom1v.com>
Signed-off-by: Romain Vimont <rom@rom1v.com>

app/src/cli.c

@@ -58,6 +58,7 @@
 #define OPT_PRINT_FPS              1038
 #define OPT_NO_POWER_ON            1039
 #define OPT_CODEC                  1040
+#define OPT_NO_AUDIO               1041
 
 struct sc_option {
     char shortopt;
@@ -299,6 +300,11 @@ static const struct sc_option options[] = {
         .text = "Do not display device (only when screen recording or V4L2 "
                 "sink is enabled).",
     },
+    {
+        .longopt_id = OPT_NO_AUDIO,
+        .longopt = "no-audio",
+        .text = "Disable audio forwarding.",
+    },
     {
         .longopt_id = OPT_NO_KEY_REPEAT,
         .longopt = "no-key-repeat",
@@ -1627,6 +1633,9 @@ parse_args_with_getopt(struct scrcpy_cli_args *args, int argc, char *argv[],
             case OPT_NO_DOWNSIZE_ON_ERROR:
                 opts->downsize_on_error = false;
                 break;
+            case OPT_NO_AUDIO:
+                opts->audio = false;
+                break;
             case OPT_NO_CLEANUP:
                 opts->cleanup = false;
                 break;

app/src/options.c

@@ -66,4 +66,5 @@ const struct scrcpy_options scrcpy_options_default = {
     .cleanup = true,
     .start_fps_counter = false,
     .power_on = true,
+    .audio = true,
 };

app/src/options.h

@@ -147,6 +147,7 @@ struct scrcpy_options {
     bool cleanup;
     bool start_fps_counter;
     bool power_on;
+    bool audio;
 };
 
 extern const struct scrcpy_options scrcpy_options_default;

app/src/scrcpy.c

@@ -348,6 +348,7 @@ scrcpy(struct scrcpy_options *options) {
         .lock_video_orientation = options->lock_video_orientation,
         .control = options->control,
         .display_id = options->display_id,
+        .audio = options->audio,
         .show_touches = options->show_touches,
         .stay_awake = options->stay_awake,
         .codec_options = options->codec_options,

app/src/server.c

@@ -217,6 +217,9 @@ execute_server(struct sc_server *server,
     ADD_PARAM("log_level=%s", log_level_to_server_string(params->log_level));
     ADD_PARAM("bit_rate=%" PRIu32, params->bit_rate);
 
+    if (!params->audio) {
+        ADD_PARAM("audio=false");
+    }
     if (params->codec != SC_CODEC_H264) {
         ADD_PARAM("codec=%s", sc_server_get_codec_name(params->codec));
     }

app/src/server.h

@@ -38,6 +38,7 @@ struct sc_server_params {
     int8_t lock_video_orientation;
     bool control;
     uint32_t display_id;
+    bool audio;
     bool show_touches;
     bool stay_awake;
     bool force_adb_forward;