create a separate WebMediaPlayer for URL derived from media stream

webkit/media/simple_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_SIMPLE_VIDEO_FRAME_PROVIDER_H_
+#define WEBKIT_MEDIA_SIMPLE_VIDEO_FRAME_PROVIDER_H_
+
+#include "base/time.h"
+#include "ui/gfx/size.h"
+#include "webkit/media/video_frame_provider.h"
+
+namespace base {
+class MessageLoopProxy;
+}
+
+namespace webkit_media {
+
+// A simple implementation of VideoFrameProvider generates raw frames and
+// passes them to webmediaplayer.
+class SimpleVideoFrameProvider : public VideoFrameProvider {
+ public:
+  SimpleVideoFrameProvider(
+      const gfx::Size& size,
+      const base::TimeDelta& frame_duration,
+      const base::Closure& error_cb,
+      const RepaintCB& repaint_cb);
+
+  // VideoFrameProvider implementation.
+  virtual void Start() OVERRIDE;
+  virtual void Stop() OVERRIDE;
+  virtual void Play() OVERRIDE;
+  virtual void Pause() OVERRIDE;
+
+ protected:
+  virtual ~SimpleVideoFrameProvider();
+
+ private:
+  enum State {
+    kStarted,
+    kPaused,
+    kStopped,
+  };
+
+  void GenerateFrame();
+
+  scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
+  gfx::Size size_;
+  State state_;
+
+  base::TimeDelta current_time_;
+  base::TimeDelta frame_duration_;
+  base::Closure error_cb_;
+  RepaintCB repaint_cb_;
+
+  DISALLOW_COPY_AND_ASSIGN(SimpleVideoFrameProvider);
+};
+
+}  // namespace webkit_media
+
+#endif  // WEBKIT_MEDIA_SIMPLE_VIDEO_FRAME_PROVIDER_H_