MediaCodecPlayer implementation (stage 4 - preroll)

media/base/android/media_codec_player.h

 // Copyright 2015 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_BASE_ANDROID_MEDIA_CODEC_PLAYER_H_
 #define MEDIA_BASE_ANDROID_MEDIA_CODEC_PLAYER_H_
 
 #include "base/android/scoped_java_ref.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 139 matching lines @@
       MetadataChangedCallback;
 
   typedef base::Callback<void(base::TimeDelta, base::TimeTicks)>
       TimeUpdateCallback;
 
   typedef base::Callback<void(const base::TimeDelta& current_timestamp)>
       SeekDoneCallback;
 
   typedef base::Callback<void(int)> ErrorCallback;
 
+  // For testing only.
+  typedef base::Callback<void(DemuxerStream::Type,
+                              base::TimeDelta,
+                              base::TimeDelta)> DecodersTimeCallback;
+
   // Constructs a player with the given ID and demuxer. |manager| must outlive
   // the lifetime of this object.
   MediaCodecPlayer(int player_id,
                    base::WeakPtr<MediaPlayerManager> manager,
                    const RequestMediaResourcesCB& request_media_resources_cb,
                    scoped_ptr<DemuxerAndroid> demuxer,
                    const GURL& frame_url);
   ~MediaCodecPlayer() override;
 
   // A helper method that performs the media thread part of initialization.
@@ skipping 17 matching lines @@
   bool CanSeekBackward() override;
   bool IsPlayerReady() override;
   void SetCdm(BrowserCdm* cdm) override;
 
   // DemuxerAndroidClient implementation.
   void OnDemuxerConfigsAvailable(const DemuxerConfigs& params) override;
   void OnDemuxerDataAvailable(const DemuxerData& params) override;
   void OnDemuxerSeekDone(base::TimeDelta actual_browser_seek_time) override;
   void OnDemuxerDurationChanged(base::TimeDelta duration) override;
 
+  // For testing only.
+  void SetDecodersTimeCallbackForTests(DecodersTimeCallback cb);
+  bool IsPrerollingForTests(DemuxerStream::Type type) const;
+
  private:
   // The state machine states.
   enum PlayerState {
     kStatePaused,
     kStateWaitingForConfig,
     kStatePrefetching,
     kStatePlaying,
     kStateStopping,
     kStateWaitingForSurface,
     kStateWaitingForSeek,
@@ skipping 25 matching lines @@
   void OnMediaMetadataChanged(base::TimeDelta duration,
                               const gfx::Size& video_size) override;
 
   // This method caches the current time and calls manager's OnTimeUpdate().
   void OnTimeUpdate(base::TimeDelta current_timestamp,
                     base::TimeTicks current_time_ticks) override;
 
   // Callbacks from decoders
   void RequestDemuxerData(DemuxerStream::Type stream_type);
   void OnPrefetchDone();
+  void OnPrerollDone();
   void OnStopDone();
   void OnError();
   void OnStarvation(DemuxerStream::Type stream_type);
   void OnTimeIntervalUpdate(DemuxerStream::Type stream_type,
                             base::TimeDelta now_playing,
                             base::TimeDelta last_buffered);
 
   // Callbacks from video decoder
   void OnVideoCodecCreated();
   void OnVideoResolutionChanged(const gfx::Size& size);
 
   // Operations called from the state machine.
   void SetState(PlayerState new_state);
   void SetPendingStart(bool need_to_start);
   bool HasPendingStart() const;
   void SetPendingSeek(base::TimeDelta timestamp);
   base::TimeDelta GetPendingSeek() const;
   bool HasVideo() const;
   bool HasAudio() const;
   void SetDemuxerConfigs(const DemuxerConfigs& configs);
   void StartPrefetchDecoders();
   void StartPlaybackOrBrowserSeek();
   StartStatus StartPlaybackDecoders();
+  StartStatus ConfigureDecoders();
+  StartStatus MaybePrerollDecoders(base::TimeDelta current_time,
+                                   bool* preroll_required);
+  StartStatus StartDecoders(base::TimeDelta current_time);
   void StopDecoders();
   void RequestToStopDecoders();
   void RequestDemuxerSeek(base::TimeDelta seek_time,
                           bool is_browser_seek = false);
   void ReleaseDecoderResources();
 
   // Helper methods.
   void CreateDecoders();
   bool AudioFinished() const;
   bool VideoFinished() const;
@@ skipping 50 matching lines @@
 
   // Data associated with a seek in progress.
   scoped_ptr<SeekInfo> seek_info_;
 
   // Configuration data for the manager, accessed on the UI thread.
   MediaMetadata metadata_cache_;
 
   // Cached current time, accessed on UI thread.
   base::TimeDelta current_time_cache_;
 
+  // For testing only.
+  DecodersTimeCallback decoders_time_cb_;
+
   base::WeakPtr<MediaCodecPlayer> media_weak_this_;
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<MediaCodecPlayer> media_weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaCodecPlayer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_MEDIA_CODEC_PLAYER_H_