Add a new API in WebMediaPlayer to do a GPU-GPU textures copy if possible

webkit/media/webmediaplayer_impl.h

 // Copyright (c) 2012 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.
 
 // Delegate calls from WebCore::MediaPlayerPrivate to Chrome's video player.
 // It contains Pipeline which is the actual media player pipeline, it glues
 // the media player pipeline, data source, audio renderer and renderer.
 // Pipeline would creates multiple threads and access some public methods
 // of this class, so we need to be extra careful about concurrent access of
 // methods and members.
@@ skipping 14 matching lines @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread.h"
 #include "googleurl/src/gurl.h"
 #include "media/base/audio_renderer_sink.h"
 #include "media/base/decryptor.h"
 #include "media/base/pipeline.h"
 #include "media/filters/skcanvas_video_renderer.h"
 #include "skia/ext/platform_canvas.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebAudioSourceProvider.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebMediaPlayer.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebMediaPlayerClient.h"
 #include "webkit/media/crypto/key_systems.h"
 #include "webkit/media/crypto/proxy_decryptor.h"
 
 class RenderAudioSourceProvider;
 
 namespace WebKit {
 class WebFrame;
@@ skipping 91 matching lines @@
   virtual float mediaTimeForTimeValue(float timeValue) const;
 
   virtual unsigned decodedFrameCount() const;
   virtual unsigned droppedFrameCount() const;
   virtual unsigned audioDecodedByteCount() const;
   virtual unsigned videoDecodedByteCount() const;
 
   virtual WebKit::WebVideoFrame* getCurrentFrame();
   virtual void putCurrentFrame(WebKit::WebVideoFrame* web_video_frame);
 
+  // Do the GPU-GPU texture copy using CHROMIUM_copy_texture extension

[scherkus (not reviewing), 2013/03/08 20:17:37]

technically this comment belongs on the interface definition as opposed to the
implementation here, so I'd just remove it here

+  virtual bool copyVideoTextureToPlatformTexture(
+      WebKit::WebGraphicsContext3D* webGraphicsContext,

[scherkus (not reviewing), 2013/03/08 20:17:37]

chromium uses unix_hacker style for variable names -- yes, I understand things
get a bit confusing when you implement a WebKit interface in Chromium :)

web_graphics_context

+      unsigned int texture,
+      unsigned int level,
+      unsigned int internalFormat);

[scherkus (not reviewing), 2013/03/08 20:17:37]

internal_format

+
   virtual WebKit::WebAudioSourceProvider* audioSourceProvider();
 
   virtual MediaKeyException generateKeyRequest(
       const WebKit::WebString& key_system,
       const unsigned char* init_data,
       unsigned init_data_length);
 
   virtual MediaKeyException addKey(const WebKit::WebString& key_system,
                                    const unsigned char* key,
                                    unsigned key_length,
@@ skipping 175 matching lines @@
   media::SkCanvasVideoRenderer skcanvas_video_renderer_;
   scoped_refptr<media::VideoFrame> current_frame_;
   bool pending_repaint_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace webkit_media
 
 #endif  // WEBKIT_MEDIA_WEBMEDIAPLAYER_IMPL_H_