Bug 1066410 - Serious color distortion happened when plays WebRTC. r=jesup

content/media/webrtc/MediaEngineWebRTC.h

@@ -197,6 +197,7 @@ public:
   void StopImpl();
   void SnapshotImpl();
   void RotateImage(layers::Image* aImage, uint32_t aWidth, uint32_t aHeight);
+  uint32_t ConvertPixexFormatToFOURCC(int aFormat);
   void Notify(const mozilla::hal::ScreenConfiguration& aConfiguration);
 
   nsresult TakePhoto(PhotoCallback* aCallback) MOZ_OVERRIDE;

content/media/webrtc/MediaEngineWebRTCVideo.cpp

@@ -968,6 +968,22 @@ MediaEngineWebRTCVideoSource::OnTakePictureComplete(uint8_t* aData, uint32_t aLe
   }
 }
 
+uint32_t
+MediaEngineWebRTCVideoSource::ConvertPixexFormatToFOURCC(int aFormat)
+{
+  switch (aFormat) {
+  case HAL_PIXEL_FORMAT_YCrCb_420_SP:
+    return libyuv::FOURCC_NV21;
+  case HAL_PIXEL_FORMAT_YV12:
+    return libyuv::FOURCC_YV12;
+  default: {
+    LOG((" xxxxx Unknown pixel format %d", aFormat));
+    MOZ_ASSERT(false, "Unknown pixel format.");
+    return libyuv::FOURCC_ANY;
+    }
+  }
+}
+
 void
 MediaEngineWebRTCVideoSource::RotateImage(layers::Image* aImage, uint32_t aWidth, uint32_t aHeight) {
   layers::GrallocImage *nativeImage = static_cast<layers::GrallocImage*>(aImage);
@@ -1003,7 +1019,7 @@ MediaEngineWebRTCVideoSource::RotateImage(layers::Image* aImage, uint32_t aWidth
                         aWidth, aHeight,
                         aWidth, aHeight,
                         static_cast<libyuv::RotationMode>(mRotation),
-                        libyuv::FOURCC_NV21);
+                        ConvertPixexFormatToFOURCC(graphicBuffer->getPixelFormat()));
   graphicBuffer->unlock();
 
   const uint8_t lumaBpp = 8;