Optimize webgl texImage2D from YUV video textures.

content/renderer/media/webmediaplayer_ms.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/webmediaplayer_ms.h"
 
 #include <stddef.h>
 #include <limits>
 #include <string>
 #include <utility>
@@ skipping 440 matching lines @@
     unsigned int internal_format,
     unsigned int type,
     bool premultiply_alpha,
     bool flip_y) {
   TRACE_EVENT0("media", "WebMediaPlayerMS:copyVideoTextureToPlatformTexture");
   DCHECK(thread_checker_.CalledOnValidThread());
 
   scoped_refptr<media::VideoFrame> video_frame =
       compositor_->GetCurrentFrameWithoutUpdatingStatistics();
 
-  if (!video_frame.get() || !video_frame->HasTextures() ||
-      media::VideoFrame::NumPlanes(video_frame->format()) != 1) {
+  if (!video_frame.get() || !video_frame->HasTextures())
     return false;
-  }
 
-  media::SkCanvasVideoRenderer::CopyVideoFrameSingleTextureToGLTexture(
-      gl, video_frame.get(), texture, internal_format, type, premultiply_alpha,
-      flip_y);
-  return true;
+  media::Context3D context_3d;
+  auto* provider =
+      RenderThreadImpl::current()->SharedMainThreadContextProvider().get();

[Daniele Castagna, 2016/07/11 18:23:35]

Isn't there a way to get a context provider without explicitly assuming which
one it is?

+  // GPU Process crashed.
+  if (!provider)
+    return false;
+  context_3d = media::Context3D(provider->ContextGL(), provider->GrContext());
+  DCHECK(context_3d.gl);
+  return media::SkCanvasVideoRenderer::CopyVideoFrameTexturesToGLTexture(

[Daniele Castagna, 2016/07/11 18:23:35]

When is gl different than context_3d.gl?

+      context_3d, gl, video_frame.get(), texture, internal_format, type,
+      premultiply_alpha, flip_y);
 }
 
 void WebMediaPlayerMS::OnFrameAvailable(
     const scoped_refptr<media::VideoFrame>& frame) {
   DVLOG(3) << __FUNCTION__;
   DCHECK(thread_checker_.CalledOnValidThread());
 
   if (render_frame_suspended_)
     return;
 
@@ skipping 58 matching lines @@
 void WebMediaPlayerMS::ResetCanvasCache() {
   DCHECK(thread_checker_.CalledOnValidThread());
   video_renderer_.ResetCache();
 }
 
 void WebMediaPlayerMS::TriggerResize() {
   get_client()->sizeChanged();
 }
 
 }  // namespace content