create WebMediaPlayer based on URL

webkit/media/video_frame_provider.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.
+
+#ifndef WEBKIT_MEDIA_VIDEO_FRAME_PROVIDER_H_
+#define WEBKIT_MEDIA_VIDEO_FRAME_PROVIDER_H_
+
+#include "base/memory/ref_counted.h"
+
+namespace media {
+class VideoFrame;
+}
+
+namespace webkit_media {
+
+// Define an interface for media stream client to get some information about
+// the media stream.
+class VideoFrameProvider
+    : public base::RefCountedThreadSafe<VideoFrameProvider> {
+ public:
+  VideoFrameProvider() {}
+  virtual void Start() = 0;
+  virtual void Stop(const base::Closure& callback) = 0;
+  virtual void GetCurrentFrame(scoped_refptr<media::VideoFrame> *frame_out) = 0;
+  virtual void PutCurrentFrame(
+      scoped_refptr<media::VideoFrame> returned_frame) = 0;
+  // Add more API, such as GetFrameSize, etc.
+
+ protected:
+  friend class base::RefCountedThreadSafe<VideoFrameProvider>;
+  virtual ~VideoFrameProvider() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(VideoFrameProvider);
+};
+
+}  // namespace webkit_media
+
+#endif  // WEBKIT_MEDIA_VIDEO_FRAME_PROVIDER_H_