Not for submission. fastSeek prototype.

media/renderers/audio_renderer_impl.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.
 
 // Audio rendering unit utilizing an AudioRendererSink to output data.
 //
 // This class lives inside three threads during it's lifetime, namely:
 // 1. Render thread
 //    Where the object is created.
 // 2. Media thread (provided via constructor)
@@ skipping 15 matching lines @@
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/power_monitor/power_observer.h"
 #include "base/synchronization/lock.h"
 #include "media/base/audio_decoder.h"
 #include "media/base/audio_renderer.h"
 #include "media/base/audio_renderer_sink.h"
 #include "media/base/decryptor.h"
 #include "media/base/media_log.h"
+#include "media/base/stream_position.h"
 #include "media/base/time_source.h"
 #include "media/filters/audio_renderer_algorithm.h"
 #include "media/filters/decoder_stream.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 class TickClock;
 }
 
 namespace media {
@@ skipping 20 matching lines @@
       AudioRendererSink* sink,
       ScopedVector<AudioDecoder> decoders,
       const scoped_refptr<MediaLog>& media_log);
   ~AudioRendererImpl() override;
 
   // TimeSource implementation.
   void StartTicking() override;
   void StopTicking() override;
   void SetPlaybackRate(double rate) override;
   void SetMediaTime(base::TimeDelta time) override;
+  void SetMediaTime_Locked(base::TimeDelta time);
   base::TimeDelta CurrentMediaTime() override;
   bool GetWallClockTimes(
       const std::vector<base::TimeDelta>& media_timestamps,
       std::vector<base::TimeTicks>* wall_clock_times) override;
 
   // AudioRenderer implementation.
   void Initialize(DemuxerStream* stream,
                   CdmContext* cdm_context,
                   RendererClient* client,
                   const PipelineStatusCB& init_cb) override;
   TimeSource* GetTimeSource() override;
   void Flush(const base::Closure& callback) override;
-  void StartPlaying() override;
+  void StartPlayingFrom(StreamPosition position) override;
   void SetVolume(float volume) override;
 
   // base::PowerObserver implementation.
   void OnSuspend() override;
   void OnResume() override;
 
  private:
   friend class AudioRendererImplTest;
 
   // Important detail: being in kPlaying doesn't imply that audio is being
@@ skipping 184 matching lines @@
   base::TimeTicks stop_rendering_time_;
 
   // Set upon receipt of the first decoded buffer after a StartPlayingFrom().
   // Used to determine how long to delay playback.
   base::TimeDelta first_packet_timestamp_;
 
   // Set by OnSuspend() and OnResume() to indicate when the system is about to
   // suspend/is suspended and when it resumes.
   bool is_suspending_;
 
+  bool start_rendering_from_first_frame_ = false;
+
   // End variables which must be accessed under |lock_|. ----------------------
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<AudioRendererImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_RENDERERS_AUDIO_RENDERER_IMPL_H_