Not for submission. fastSeek prototype.

media/renderers/video_renderer_impl.h

Index: media/renderers/video_renderer_impl.h
diff --git a/media/renderers/video_renderer_impl.h b/media/renderers/video_renderer_impl.h
index 3938364eb1177efb3f1770984eee3123f931f31e..975b0296b98d9fc592f79ffe7c78cadf39255e6f 100644
--- a/media/renderers/video_renderer_impl.h
+++ b/media/renderers/video_renderer_impl.h
@@ -8,7 +8,6 @@
 #include <stddef.h>
 #include <stdint.h>
 
-#include <deque>
 #include <memory>
 
 #include "base/macros.h"
@@ -22,6 +21,7 @@
 #include "media/base/demuxer_stream.h"
 #include "media/base/media_log.h"
 #include "media/base/pipeline_status.h"
+#include "media/base/stream_position.h"
 #include "media/base/video_decoder.h"
 #include "media/base/video_frame.h"
 #include "media/base/video_renderer.h"
@@ -38,9 +38,9 @@ class TickClock;
 
 namespace media {
 
-// VideoRendererImpl handles reading from a VideoFrameStream storing the
-// results in a queue of decoded frames and executing a callback when a frame is
-// ready for rendering.
+// VideoRendererImpl handles reading from a VideoFrameStream, storing the
+// results in a queue of decoded frames, and selecting the best one for display
+// in response to Render() calls.
 class MEDIA_EXPORT VideoRendererImpl
     : public VideoRenderer,
       public NON_EXPORTED_BASE(VideoRendererSink::RenderCallback) {
@@ -69,7 +69,7 @@ class MEDIA_EXPORT VideoRendererImpl
                   const TimeSource::WallClockTimeCB& wall_clock_time_cb,
                   const PipelineStatusCB& init_cb) override;
   void Flush(const base::Closure& callback) override;
-  void StartPlayingFrom(base::TimeDelta timestamp) override;
+  void StartPlayingFrom(StreamPosition position) override;
   void OnTimeStateChanged(bool time_progressing) override;
 
   void SetTickClockForTesting(std::unique_ptr<base::TickClock> tick_clock);
@@ -108,7 +108,7 @@ class MEDIA_EXPORT VideoRendererImpl
   void FrameReady(VideoFrameStream::Status status,
                   const scoped_refptr<VideoFrame>& frame);
 
-  // Helper method for enqueueing a frame to |alogorithm_|.
+  // Helper method for enqueueing a frame to |algorithm_|.
   void AddReadyFrame_Locked(const scoped_refptr<VideoFrame>& frame);
 
   // Helper method that schedules an asynchronous read from the
@@ -252,6 +252,8 @@ class MEDIA_EXPORT VideoRendererImpl
   base::Closure flush_cb_;
   TimeSource::WallClockTimeCB wall_clock_time_cb_;
 
+  bool start_rendering_from_first_frame_;
+
   base::TimeDelta start_timestamp_;
 
   // Keeps track of the number of frames decoded and dropped since the