Prime the landing pad for the new video rendering pipeline.

media/renderers/video_renderer_impl.h

 // Copyright 2013 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 MEDIA_RENDERERS_VIDEO_RENDERER_IMPL_H_
 #define MEDIA_RENDERERS_VIDEO_RENDERER_IMPL_H_
 
 #include <deque>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
 #include "base/synchronization/condition_variable.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/platform_thread.h"
 #include "media/base/decryptor.h"
 #include "media/base/demuxer_stream.h"
 #include "media/base/media_log.h"
 #include "media/base/pipeline_status.h"
 #include "media/base/video_decoder.h"
 #include "media/base/video_frame.h"
 #include "media/base/video_renderer.h"
+#include "media/base/video_renderer_sink.h"
 #include "media/filters/decoder_stream.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 class TickClock;
 }
 
 namespace media {
 
 // VideoRendererImpl creates its own thread for the sole purpose of timing frame
 // presentation.  It handles reading from the VideoFrameStream and stores the
 // results in a queue of decoded frames and executing a callback when a frame is
 // ready for rendering.
 class MEDIA_EXPORT VideoRendererImpl
     : public VideoRenderer,
+      public NON_EXPORTED_BASE(VideoRendererSink::RenderCallback),
       public base::PlatformThread::Delegate {
  public:
   // |decoders| contains the VideoDecoders to use when initializing.
   //
   // Implementors should avoid doing any sort of heavy work in this method and
   // instead post a task to a common/worker thread to handle rendering.  Slowing
   // down the video thread may result in losing synchronization with audio.
   //
   // Setting |drop_frames_| to true causes the renderer to drop expired frames.
   VideoRendererImpl(
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
+      VideoRendererSink* sink,
       ScopedVector<VideoDecoder> decoders,
       bool drop_frames,
       const scoped_refptr<MediaLog>& media_log);
   ~VideoRendererImpl() override;
 
   // VideoRenderer implementation.
   void Initialize(DemuxerStream* stream,
                   const PipelineStatusCB& init_cb,
                   const SetDecryptorReadyCB& set_decryptor_ready_cb,
                   const StatisticsCB& statistics_cb,
                   const BufferingStateCB& buffering_state_cb,
-                  const PaintCB& paint_cb,
                   const base::Closure& ended_cb,
                   const PipelineStatusCB& error_cb,
                   const WallClockTimeCB& wall_clock_time_cb,
                   const base::Closure& waiting_for_decryption_key_cb) override;
   void Flush(const base::Closure& callback) override;
   void StartPlayingFrom(base::TimeDelta timestamp) override;
   void OnTimeStateChanged(bool time_progressing) override;
 
   // PlatformThread::Delegate implementation.
   void ThreadMain() override;
 
   void SetTickClockForTesting(scoped_ptr<base::TickClock> tick_clock);
 
+  // VideoRendererSink::RenderCallback implementation.
+  scoped_refptr<VideoFrame> Render(base::TimeTicks deadline_min,
+                                   base::TimeTicks deadline_max) override;
+  void OnFrameDropped() override;
+
  private:
   // Creates a dedicated |thread_| for video rendering.
   void CreateVideoThread();
 
   // Callback for |video_frame_stream_| initialization.
   void OnVideoFrameStreamInitialized(bool success);
 
   // Callback for |video_frame_stream_| to deliver decoded video frames and
   // report video decoding status.
   void FrameReady(VideoFrameStream::Status status,
@@ skipping 26 matching lines @@
   bool HaveEnoughData_Locked();
   void TransitionToHaveEnough_Locked();
 
   // Runs |statistics_cb_| with |frames_decoded_| and |frames_dropped_|, resets
   // them to 0, and then waits on |frame_available_| for up to the
   // |wait_duration|.
   void UpdateStatsAndWait_Locked(base::TimeDelta wait_duration);
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
+  VideoRendererSink* const sink_;
+
   // Used for accessing data members.
   base::Lock lock_;
 
   // Provides video frames to VideoRendererImpl.
   scoped_ptr<VideoFrameStream> video_frame_stream_;
 
   // Flag indicating low-delay mode.
   bool low_delay_;
 
   // Queue of incoming frames yet to be painted.
@@ skipping 81 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<VideoRendererImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoRendererImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_RENDERERS_VIDEO_RENDERER_IMPL_H_