feat(ddprobe): allow to manually specify gpu preference

docs/configuration.md

@@ -848,6 +848,37 @@ editing the `conf` file in a text editor. Use the examples as reference.
     </tr>
 </table>
 
+### gpu_preference
+
+<table>
+    <tr>
+        <td>Description</td>
+        <td colspan="2">
+            Specify the GPU preference for the Sunshine process.
+            <br>
+            <br>
+            If set to negative number (-1 by default), Sunshine will try to detect the best GPU for the streamed display, but if it fails you will get a black screen.
+            <br>
+            Setting it to 0 will allow Windows to try and select the best GPU.
+            <br>
+            Setting it to 1 and above will prioritize the GPU that matches this number (the number has to be guessed, but it starts at 1 and increases).
+            @note{Applies to Windows only.}
+        </td>
+    </tr>
+    <tr>
+        <td>Default</td>
+        <td colspan="2">@code{}
+            -1
+            @endcode</td>
+    </tr>
+    <tr>
+        <td>Example</td>
+        <td colspan="2">@code{}
+            2
+            @endcode</td>
+    </tr>
+</table>
+
 ### output_name
 
 <table>

src/config.cpp

@@ -436,6 +436,7 @@ namespace config {
     {},  // capture
     {},  // encoder
     {},  // adapter_name
+    -1,  // gpu_preference
     {},  // output_name
 
     {
@@ -1088,6 +1089,7 @@ namespace config {
     string_f(vars, "capture", video.capture);
     string_f(vars, "encoder", video.encoder);
     string_f(vars, "adapter_name", video.adapter_name);
+    int_f(vars, "gpu_preference", video.gpu_preference);
     string_f(vars, "output_name", video.output_name);
 
     generic_f(vars, "dd_configuration_option", video.dd.configuration_option, dd::config_option_from_view);

src/config.h

@@ -77,6 +77,7 @@ namespace config {
     std::string capture;
     std::string encoder;
     std::string adapter_name;
+    int gpu_preference;
     std::string output_name;
 
     struct dd_t {

src/platform/windows/display_base.cpp

@@ -415,16 +415,25 @@ namespace platf::dxgi {
       return set_gpu_preference_on_self(pref_it->second);
     }
 
-    // Try probing with different GPU preferences and verify_frame_capture flag
-    if (const auto pref = validate_and_test_gpu_preference(display_name, true); pref) {
-      gpu_preference.emplace(display_name, *pref);
-      return true;
+    // If the GPU preference was manually specified, we can skip the probe.
+    if (config::video.gpu_preference >= 0) {
+      if (set_gpu_preference_on_self(config::video.gpu_preference)) {
+        gpu_preference.emplace(display_name, config::video.gpu_preference);
+        return true;
+      }
     }
+    else {
+      // Try probing with different GPU preferences and verify_frame_capture flag
+      if (const auto pref = validate_and_test_gpu_preference(display_name, true); pref) {
+        gpu_preference.emplace(display_name, *pref);
+        return true;
+      }
 
-    // If no valid configuration was found, try again with verify_frame_capture == false
-    if (const auto pref = validate_and_test_gpu_preference(display_name, false); pref) {
-      gpu_preference.emplace(display_name, *pref);
-      return true;
+      // If no valid configuration was found, try again with verify_frame_capture == false
+      if (const auto pref = validate_and_test_gpu_preference(display_name, false); pref) {
+        gpu_preference.emplace(display_name, *pref);
+        return true;
+      }
     }
 
     // If neither worked, return false

src_assets/common/assets/web/config.html

@@ -169,6 +169,7 @@ <h1 class="my-4">{{ $t('config.configuration') }}</h1>
               "virtual_sink": "",
               "install_steam_audio_drivers": "enabled",
               "adapter_name": "",
+              "gpu_preference": -1,
               "output_name": "",
               "dd_configuration_option": "verify_only",
               "dd_resolution_option": "auto",

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

@@ -69,6 +69,18 @@ const config = ref(props.config)
         :config="config"
     />
 
+    <PlatformLayout :platform="platform">
+      <template #windows>
+        <!-- GPU Preference -->
+        <div class="mb-3">
+          <label for="gpu_preference" class="form-label">{{ $t('config.gpu_preference') }}</label>
+          <input type="text" class="form-control" id="gpu_preference" placeholder="-1"
+                 v-model="config.gpu_preference" />
+          <div class="form-text">{{ $t('config.gpu_preference_desc') }}</div>
+        </div>
+      </template>
+    </PlatformLayout>
+
     <DisplayOutputSelector
       :platform="platform"
       :config="config"

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

@@ -186,6 +186,8 @@
     "fec_percentage": "FEC Percentage",
     "fec_percentage_desc": "Percentage of error correcting packets per data packet in each video frame. Higher values can correct for more network packet loss, but at the cost of increasing bandwidth usage.",
     "ffmpeg_auto": "auto -- let ffmpeg decide (default)",
+    "gpu_preference": "GPU Preference",
+    "gpu_preference_desc": "Specify the GPU preference for the Sunshine process. If set to negative number (-1 by default), Sunshine will try to detect the best GPU for the streamed display, but if it fails you will get a black screen. Setting it to 0 will allow Windows to try and select the best GPU. Setting it to 1 and above will prioritize the GPU that matches this number (the number has to be guessed, but it starts at 1 and increases).",
     "file_apps": "Apps File",
     "file_apps_desc": "The file where current apps of Sunshine are stored.",
     "file_state": "State File",