Cap resolution options at 1080p on Steam Link and Raspberry Pi due to hardware limitations

app/streaming/video/decoder.h

@@ -46,6 +46,7 @@ public:
     virtual bool isAlwaysFullScreen() = 0;
     virtual int getDecoderCapabilities() = 0;
     virtual int getDecoderColorspace() = 0;
+    virtual QSize getDecoderMaxResolution() = 0;
     virtual int submitDecodeUnit(PDECODE_UNIT du) = 0;
     virtual void renderFrameOnMainThread() = 0;
 };

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

@@ -134,8 +134,8 @@ enum AVPixelFormat MmalRenderer::getPreferredPixelFormat(int videoFormat)
 
 int MmalRenderer::getRendererAttributes()
 {
-    // This renderer can only draw in full-screen
-    return RENDERER_ATTRIBUTE_FULLSCREEN_ONLY;
+    // This renderer can only draw in full-screen and maxes out at 1080p
+    return RENDERER_ATTRIBUTE_FULLSCREEN_ONLY | RENDERER_ATTRIBUTE_1080P_MAX;
 }
 
 bool MmalRenderer::needsTestFrame()

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

@@ -10,6 +10,7 @@ extern "C" {
 }
 
 #define RENDERER_ATTRIBUTE_FULLSCREEN_ONLY 0x01
+#define RENDERER_ATTRIBUTE_1080P_MAX 0x02
 
 class IFFmpegRenderer : public Overlay::IOverlayRenderer {
 public:

app/streaming/video/ffmpeg.cpp

@@ -71,6 +71,17 @@ int FFmpegVideoDecoder::getDecoderColorspace()
     return m_FrontendRenderer->getDecoderColorspace();
 }
 
+QSize FFmpegVideoDecoder::getDecoderMaxResolution()
+{
+    if (m_BackendRenderer->getRendererAttributes() & RENDERER_ATTRIBUTE_1080P_MAX) {
+        return QSize(1920, 1080);
+    }
+    else {
+        // No known maximum
+        return QSize(0, 0);
+    }
+}
+
 enum AVPixelFormat FFmpegVideoDecoder::ffGetFormat(AVCodecContext* context,
                                                    const enum AVPixelFormat* pixFmts)
 {

app/streaming/video/ffmpeg.h

@@ -19,6 +19,7 @@ public:
     virtual bool isAlwaysFullScreen() override;
     virtual int getDecoderCapabilities() override;
     virtual int getDecoderColorspace() override;
+    virtual QSize getDecoderMaxResolution() override;
     virtual int submitDecodeUnit(PDECODE_UNIT du) override;
     virtual void renderFrameOnMainThread() override;
 

app/streaming/video/slvid.cpp

@@ -42,6 +42,11 @@ SLVideoDecoder::getDecoderColorspace()
     return COLORSPACE_REC_709;
 }
 
+QSize SLVideoDecoder::getDecoderMaxResolution()
+{
+    return QSize(1920, 1080);
+}
+
 bool
 SLVideoDecoder::initialize(PDECODER_PARAMETERS params)
 {

app/streaming/video/slvid.h

@@ -14,6 +14,7 @@ public:
     virtual bool isAlwaysFullScreen();
     virtual int getDecoderCapabilities();
     virtual int getDecoderColorspace();
+    virtual QSize getDecoderMaxResolution();
     virtual int submitDecodeUnit(PDECODE_UNIT du);
 
     // Unused since rendering is done directly from the decode thread