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

docs/configuration.md

@@ -770,6 +770,29 @@ editing the `conf` file in a text editor. Use the examples as reference.
     </tr>
 </table>
 
+### stream_audio
+
+<table>
+    <tr>
+        <td>Description</td>
+        <td colspan="2">
+            Whether to stream audio or not. Disabling this can be useful for streaming headless displays as second monitors.
+        </td>
+    </tr>
+    <tr>
+        <td>Default</td>
+        <td colspan="2">@code{}
+            enabled
+            @endcode</td>
+    </tr>
+    <tr>
+        <td>Example</td>
+        <td colspan="2">@code{}
+            stream_audio = disabled
+            @endcode</td>
+    </tr>
+</table>
+
 ### install_steam_audio_drivers
 
 <table>

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;
   };
 

src_assets/common/assets/web/configs/tabs/AudioVideo.vue

@@ -63,6 +63,14 @@ const config = ref(props.config)
       </template>
     </PlatformLayout>
 
+    <!-- Disable Audio -->
+    <Checkbox class="mb-3"
+              id="stream_audio"
+              locale-prefix="config"
+              v-model="config.stream_audio"
+              default="true"
+    ></Checkbox>
+
     <AdapterNameSelector
         :platform="platform"
         :config="config"

src_assets/common/assets/web/public/assets/locale/en.json

@@ -329,6 +329,8 @@
     "qsv_slow_hevc": "Allow Slow HEVC Encoding",
     "qsv_slow_hevc_desc": "This can enable HEVC encoding on older Intel GPUs, at the cost of higher GPU usage and worse performance.",
     "restart_note": "Sunshine is restarting to apply changes.",
+    "stream_audio": "Stream Audio",
+    "stream_audio_desc": "Whether to stream audio or not. Disabling this can be useful for streaming headless displays as second monitors.",
     "sunshine_name": "Sunshine Name",
     "sunshine_name_desc": "The name displayed by Moonlight. If not specified, the PC's hostname is used",
     "sw_preset": "SW Presets",