Support texture scaling in Androids MediaEncoder

webrtc/modules/video_coding/utility/quality_scaler.h

Index: webrtc/modules/video_coding/utility/quality_scaler.h
diff --git a/webrtc/modules/video_coding/utility/quality_scaler.h b/webrtc/modules/video_coding/utility/quality_scaler.h
index a1233cca517e4b63204228eba30936e55f58e442..2e3efdee33103796beb4b6093febd51a02522402 100644
--- a/webrtc/modules/video_coding/utility/quality_scaler.h
+++ b/webrtc/modules/video_coding/utility/quality_scaler.h
@@ -34,7 +34,7 @@ class QualityScaler {
   void ReportDroppedFrame();
   void Reset(int framerate, int bitrate, int width, int height);
   void OnEncodeFrame(const VideoFrame& frame);
-  Resolution GetScaledResolution() const;
+  const Resolution& GetScaledResolution() const;

[magjed_webrtc, 2015/11/26 13:23:34]

I don't like this change. I prefer to return non-ref. Any performance difference
should be negligible. If you want to make a change, I think you should make
GetScaledFrame() return a non-ref as well and remove |scaled_frame_|. The
VideoFrame can be a local variable in GetScaledFrame() instead.

   const VideoFrame& GetScaledFrame(const VideoFrame& frame);
   int GetTargetFramerate() const;
   int downscale_shift() const { return downscale_shift_; }