feat(audio): add an option to disable sound streaming (#3833)

src/audio.cpp

@@ -129,6 +129,10 @@ namespace audio {
 
   void capture(safe::mail_t mail, config_t config, void *channel_data) {
     auto shutdown_event = mail->event<bool>(mail::shutdown);
+    if (!config::audio.stream) {
+      shutdown_event->view();
+      return;
+    }
     auto stream = stream_configs[map_stream(config.channels, config.flags[config_t::HIGH_QUALITY])];
     if (config.flags[config_t::CUSTOM_SURROUND_PARAMS]) {
       apply_surround_params(stream, config.customStreamParams);

src/config.cpp

@@ -511,6 +511,7 @@ namespace config {
   audio_t audio {
     {},  // audio_sink
     {},  // virtual_sink
+    true,  // stream audio
     true,  // install_steam_drivers
   };
 
@@ -1160,6 +1161,7 @@ namespace config {
 
     string_f(vars, "audio_sink", audio.sink);
     string_f(vars, "virtual_sink", audio.virtual_sink);
+    bool_f(vars, "stream_audio", audio.stream);
     bool_f(vars, "install_steam_audio_drivers", audio.install_steam_drivers);
 
     string_restricted_f(vars, "origin_web_ui_allowed", nvhttp.origin_web_ui_allowed, {"pc"sv, "lan"sv, "wan"sv});

src/config.h

@@ -147,6 +147,7 @@ namespace config {
   struct audio_t {
     std::string sink;
     std::string virtual_sink;
+    bool stream;
     bool install_steam_drivers;
   };