webkit/media/simple_video_frame_provider.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef WEBKIT_MEDIA_SIMPLE_VIDEO_FRAME_PROVIDER_H_
   6 #define WEBKIT_MEDIA_SIMPLE_VIDEO_FRAME_PROVIDER_H_
   7
   8 #include "base/time.h"
   9 #include "ui/gfx/size.h"
  10 #include "webkit/media/video_frame_provider.h"
  11
  12 namespace base {
  13 class MessageLoopProxy;
  14 }
  15
  16 namespace webkit_media {
  17
  18 // A simple implementation of VideoFrameProvider generates raw frames and
  19 // passes them to webmediaplayer.
  20 class SimpleVideoFrameProvider : public VideoFrameProvider {
  21  public:
  22   SimpleVideoFrameProvider(
  23       const gfx::Size& size,
  24       const base::TimeDelta& frame_duration,
  25       const base::Closure& error_cb,
  26       const RepaintCB& repaint_cb);
  27
  28   // VideoFrameProvider implementation.
  29   virtual void Start() OVERRIDE;
  30   virtual void Stop() OVERRIDE;
  31   virtual void Play() OVERRIDE;
  32   virtual void Pause() OVERRIDE;
  33
  34  protected:
  35   virtual ~SimpleVideoFrameProvider();
  36
  37  private:
  38   enum State {
  39     kStarted,
  40     kPaused,
  41     kStopped,
  42   };
  43
  44   void GenerateFrame();
  45
  46   scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
  47   gfx::Size size_;
  48   State state_;
  49
  50   base::TimeDelta current_time_;
  51   base::TimeDelta frame_duration_;
  52   base::Closure error_cb_;
  53   RepaintCB repaint_cb_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(SimpleVideoFrameProvider);
  56 };
  57
  58 }  // namespace webkit_media
  59
  60 #endif  // WEBKIT_MEDIA_SIMPLE_VIDEO_FRAME_PROVIDER_H_