Allow audio renderers to specify capabilities

app/streaming/audio/audio.cpp

@@ -28,6 +28,22 @@ IAudioRenderer* Session::createAudioRenderer()
 #endif
 }
 
+int Session::getAudioRendererCapabilities()
+{
+    IAudioRenderer* audioRenderer;
+
+    audioRenderer = createAudioRenderer();
+    if (audioRenderer == nullptr) {
+        return 0;
+    }
+
+    int caps = audioRenderer->getCapabilities();
+
+    delete audioRenderer;
+
+    return caps;
+}
+
 bool Session::testAudio(int audioConfiguration)
 {
     IAudioRenderer* audioRenderer;

app/streaming/audio/renderers/renderer.h

@@ -13,4 +13,6 @@ public:
 
     // Return false if an unrecoverable error has occurred and the renderer must be reinitialized
     virtual bool submitAudio(int bytesWritten) = 0;
+
+    virtual int getCapabilities() = 0;
 };

app/streaming/audio/renderers/sdl.h

@@ -16,6 +16,8 @@ public:
 
     virtual bool submitAudio(int bytesWritten);
 
+    virtual int getCapabilities();
+
 private:
     SDL_AudioDeviceID m_AudioDevice;
     void* m_AudioBuffer;

app/streaming/audio/renderers/sdlaud.cpp

@@ -100,3 +100,8 @@ bool SdlAudioRenderer::submitAudio(int bytesWritten)
 
     return true;
 }
+
+int SdlAudioRenderer::getCapabilities()
+{
+    return CAPABILITY_DIRECT_SUBMIT;
+}

app/streaming/audio/renderers/slaud.cpp

@@ -90,6 +90,11 @@ bool SLAudioRenderer::submitAudio(int bytesWritten)
     return true;
 }
 
+int SLAudioRenderer::getCapabilities()
+{
+    return CAPABILITY_SLOW_OPUS_DECODER;
+}
+
 void SLAudioRenderer::slLogCallback(void*, ESLAudioLog logLevel, const char *message)
 {
     SDL_LogPriority priority;

app/streaming/audio/renderers/slaud.h

@@ -16,6 +16,8 @@ public:
 
     virtual bool submitAudio(int bytesWritten);
 
+    virtual int getCapabilities();
+
 private:
     static void slLogCallback(void* context, ESLAudioLog logLevel, const char* message);
 

app/streaming/audio/renderers/soundioaudiorenderer.cpp

@@ -317,6 +317,11 @@ bool SoundIoAudioRenderer::submitAudio(int bytesWritten)
     return true;
 }
 
+int SoundIoAudioRenderer::getCapabilities()
+{
+    return CAPABILITY_DIRECT_SUBMIT;
+}
+
 void SoundIoAudioRenderer::sioErrorCallback(SoundIoOutStream* stream, int err)
 {
     auto me = reinterpret_cast<SoundIoAudioRenderer*>(stream->userdata);

app/streaming/audio/renderers/soundioaudiorenderer.h

@@ -17,6 +17,8 @@ public:
 
     virtual bool submitAudio(int bytesWritten);
 
+    virtual int getCapabilities();
+
 private:
     int scoreChannelLayout(const struct SoundIoChannelLayout* layout, const OPUS_MULTISTREAM_CONFIGURATION* opusConfig);