Improving the decoder pipeline.

remoting/base/util.h

Index: remoting/base/util.h
diff --git a/remoting/base/util.h b/remoting/base/util.h
index c05ef2f99f9b24e262259ea7755ad063adcc9870..9d1f9c6975711ccc618b30dd26b12ed3fc6134b1 100644
--- a/remoting/base/util.h
+++ b/remoting/base/util.h
@@ -18,16 +18,32 @@ std::string GetTimestampString();
 // TODO(sergeyu): Move these methods to media.
 int GetBytesPerPixel(media::VideoFrame::Format format);
 
-// Convert YUV to RGB32 on a specific rectangle.
-void ConvertYUVToRGB32WithRect(const uint8* y_plane,
-                               const uint8* u_plane,
-                               const uint8* v_plane,
-                               uint8* rgb_plane,
-                               const SkIRect& rect,
-                               int y_stride,
-                               int uv_stride,
-                               int rgb_stride);
+// Convert and scale YUV to RGB32 on a specific rectangle. The source and
+// destination buffers are assumed to contain only |source_clip| and |dest_clip|
+// areas correspondingly. The scaling factor is determined as ratio between
+// |dest_size| and |source_size|. The target rectangle |dect_rect| is specified
+// in the destination coordinates.
+//
+// The routine DCHECKs that clipping boundaries are completely contained within
+// the corresponding images. It also DCHECKs that the source and target
+// rectangle fits the corresponding clipping areas.
+//
+// N.B. The function requires the top left corner of |dect_rect| to have even
+// X and Y coordinates.
+void ConvertAndScaleYUVToRGB32Rect(const uint8* source_yplane,
+                                   const uint8* source_uplane,
+                                   const uint8* source_vplane,
+                                   int source_ystride,
+                                   int source_uvstride,
+                                   const SkISize& source_size,
+                                   const SkIRect& source_clip,
+                                   uint8* dest_buffer,
+                                   int dest_stride,
+                                   const SkISize& dest_size,
+                                   const SkIRect& dest_clip,
+                                   const SkIRect& dest_rect);
 
+// Convert RGB32 to YUV on a specific rectangle.
 void ConvertRGB32ToYUVWithRect(const uint8* rgb_plane,
                                uint8* y_plane,
                                uint8* u_plane,
@@ -60,6 +76,14 @@ void CopyRect(const uint8* src_plane,
               int bytes_per_pixel,
               const SkIRect& rect);
 
+void CopyRGB32Rect(const uint8* source_buffer,
+                   int source_stride,
+                   const SkIRect& source_clip,
+                   uint8* dest_buffer,
+                   int dest_stride,
+                   const SkIRect& dest_clip,
+                   const SkIRect& dest_rect);
+
 }  // namespace remoting
 
 #endif  // REMOTING_BASE_UTIL_H_