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 // Since non-black pixel values are required in the layout test, e.g.,
  21 // media/video-capture-canvas.html, this class should generate frame with
  22 // only non-black pixels.
  23 class SimpleVideoFrameProvider : public VideoFrameProvider {
  24  public:
  25   SimpleVideoFrameProvider(
  26       const gfx::Size& size,
  27       const base::TimeDelta& frame_duration,
  28       const base::Closure& error_cb,
  29       const RepaintCB& repaint_cb);
  30
  31   // VideoFrameProvider implementation.
  32   virtual void Start() OVERRIDE;
  33   virtual void Stop() OVERRIDE;
  34   virtual void Play() OVERRIDE;
  35   virtual void Pause() OVERRIDE;
  36
  37  protected:
  38   virtual ~SimpleVideoFrameProvider();
  39
  40  private:
  41   enum State {
  42     kStarted,
  43     kPaused,
  44     kStopped,
  45   };
  46
  47   void GenerateFrame();
  48
  49   scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
  50   gfx::Size size_;
  51   State state_;
  52
  53   base::TimeDelta current_time_;
  54   base::TimeDelta frame_duration_;
  55   base::Closure error_cb_;
  56   RepaintCB repaint_cb_;
  57
  58   DISALLOW_COPY_AND_ASSIGN(SimpleVideoFrameProvider);
  59 };
  60
  61 }  // namespace webkit_media
  62
  63 #endif  // WEBKIT_MEDIA_SIMPLE_VIDEO_FRAME_PROVIDER_H_