Only enable slicing when CPU decoding

app/streaming/session.cpp

@@ -282,7 +282,7 @@ bool Session::populateDecoderProperties(SDL_Window* window)
         return false;
     }
 
-    m_VideoCallbacks.capabilities |= decoder->getDecoderCapabilities();
+    m_VideoCallbacks.capabilities = decoder->getDecoderCapabilities();
 
     m_StreamConfig.colorSpace = decoder->getDecoderColorspace();
 
@@ -350,13 +350,6 @@ bool Session::initialize()
     m_VideoCallbacks.setup = drSetup;
     m_VideoCallbacks.submitDecodeUnit = drSubmitDecodeUnit;
 
-    // Slice up to 4 times for parallel decode, once slice per core
-    int slices = qMin(MAX_SLICES, SDL_GetCPUCount());
-    m_VideoCallbacks.capabilities |= CAPABILITY_SLICES_PER_FRAME(slices);
-    SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
-                "Encoder configured for %d slices per frame",
-                slices);
-
     LiInitializeStreamConfiguration(&m_StreamConfig);
     m_StreamConfig.width = m_Preferences->width;
     m_StreamConfig.height = m_Preferences->height;

app/streaming/video/ffmpeg-renderers/sdlvid.cpp

@@ -127,6 +127,16 @@ bool SdlRenderer::isRenderThreadSupported()
     return true;
 }
 
+int SdlRenderer::getDecoderCapabilities()
+{
+    // Slice up to 4 times for parallel decode, once slice per core
+    int slices = qMin(MAX_SLICES, SDL_GetCPUCount());
+    SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
+                "Encoder configured for %d slices per frame",
+                slices);
+    return CAPABILITY_SLICES_PER_FRAME(slices);
+}
+
 bool SdlRenderer::initialize(PDECODER_PARAMETERS params)
 {
     Uint32 rendererFlags = SDL_RENDERER_ACCELERATED;

app/streaming/video/ffmpeg-renderers/sdlvid.h

@@ -13,6 +13,7 @@ public:
     virtual void renderFrame(AVFrame* frame) override;
     virtual void notifyOverlayUpdated(Overlay::OverlayType) override;
     virtual bool isRenderThreadSupported() override;
+    virtual int getDecoderCapabilities() override;
 
 private:
     void renderOverlay(Overlay::OverlayType type);