Handle config changes for MSE on android

media/base/android/media_source_player.h

 // Copyright (c) 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_BASE_ANDROID_MEDIA_SOURCE_PLAYER_H_
 #define MEDIA_BASE_ANDROID_MEDIA_SOURCE_PLAYER_H_
 
 #include <jni.h>
 #include <map>
 #include <string>
@@ skipping 41 matching lines @@
   // Flush the decoder.
   void Flush();
 
   struct Deleter {
       inline void operator()(MediaDecoderJob* ptr) const { ptr->Release(); }
   };
 
   // Causes this instance to be deleted on the thread it is bound to.
   void Release();
 
+  // Called on the UI thread to indicate that one decode cycle has completed.
+  void OnDecodeCompleted();
+
  protected:
   MediaDecoderJob(base::Thread* thread, bool is_audio);
 
   // Release the output buffer and render it.
   void ReleaseOutputBuffer(
       int outputBufferIndex, size_t size,
       const base::TimeDelta& presentation_timestamp,
       bool end_of_stream, const MediaDecoderJob::DecoderCallback& callback);
 
   // Helper function to decoder data on |thread_|. |unit| contains all the data
@@ skipping 17 matching lines @@
 
   // Thread the decode task runs on.
   base::Thread* thread_;
 
   // Whether the decoder needs to be flushed.
   bool needs_flush_;
 
   // Whether this is an audio decoder.
   bool is_audio_;
 
-  // Weak pointer passed to media decoder jobs for callbacks.
+  // Weak pointer passed to media decoder jobs for callbacks. It is bounded to
+  // the decoder thread.
   base::WeakPtrFactory<MediaDecoderJob> weak_this_;
+
+  // Whether the decoder is actively decoding data.
+  bool decoding_;
 };
 
 typedef scoped_ptr<MediaDecoderJob, MediaDecoderJob::Deleter>
     ScopedMediaDecoderJob;
 
 // This class handles media source extensions on Android. It uses Android
 // MediaCodec to decode audio and video streams in two separate threads.
 // IPC is being used to send data from the render process to this object.
 // TODO(qinmin): use shared memory to send data between processes.
 class MEDIA_EXPORT MediaSourcePlayer : public MediaPlayerAndroid {
@@ skipping 13 matching lines @@
   virtual void SetVolume(float leftVolume, float rightVolume) OVERRIDE;
   virtual int GetVideoWidth() OVERRIDE;
   virtual int GetVideoHeight() OVERRIDE;
   virtual base::TimeDelta GetCurrentTime() OVERRIDE;
   virtual base::TimeDelta GetDuration() OVERRIDE;
   virtual bool IsPlaying() OVERRIDE;
   virtual bool CanPause() OVERRIDE;
   virtual bool CanSeekForward() OVERRIDE;
   virtual bool CanSeekBackward() OVERRIDE;
   virtual bool IsPlayerReady() OVERRIDE;
-  virtual void OnSeekRequestAck() OVERRIDE;
+  virtual void OnSeekRequestAck(unsigned seek_request_id) OVERRIDE;
 
   // Called when the demuxer is ready.
   virtual void DemuxerReady(
       const MediaPlayerHostMsg_DemuxerReady_Params& params) OVERRIDE;
 
   // Called when the requested data is received from the demuxer.
   virtual void ReadFromDemuxerAck(
       const MediaPlayerHostMsg_ReadFromDemuxerAck_Params& params) OVERRIDE;
 
  private:
@@ skipping 10 matching lines @@
 
   // Called when the decoder finishes its task.
   void MediaDecoderCallback(
         bool is_audio, bool decode_succeeded,
         const base::TimeDelta& presentation_timestamp,
         const base::Time& wallclock_time, bool end_of_stream);
 
   // Handle pending events when all the decoder jobs finished.
   void ProcessPendingEvents();
 
+  // Helper method to create the decoder jobs.
+  void CreateVideoDecoderJob();
+  void CreateAudioDecoderJob();
+
   // Flush the decoders and clean up all the data needs to be decoded.
   void ClearDecodingData();
 
   // Called to decoder more data.
   void DecodeMoreAudio();
   void DecodeMoreVideo();
 
   // Functions check whether audio/video is present.
   bool HasVideo();
   bool HasAudio();
 
   enum PendingEventFlags {
     NO_EVENT_PENDING = 0,
     SEEK_EVENT_PENDING = 1 << 0,
     SURFACE_CHANGE_EVENT_PENDING = 1 << 1,
+    CONFIG_CHANGE_EVENT_PENDING = 1 << 2,
   };
   // Pending event that the player needs to do.
   unsigned pending_event_;
 
   // Number of active decoding tasks.
   int active_decoding_tasks_;
 
+  // ID to keep track of whether all the seek requests are acked.
+  unsigned seek_request_id_;
+
   // Stats about the media.
   base::TimeDelta duration_;
   int width_;
   int height_;
   AudioCodec audio_codec_;
   VideoCodec video_codec_;
   int num_channels_;
   int sampling_rate_;
   bool seekable_;
   base::TimeDelta last_presentation_timestamp_;
   std::vector<uint8> audio_extra_data_;
   bool audio_finished_;
   bool video_finished_;
   bool playing_;
 
   // Timestamps for providing simple A/V sync. When start decoding an audio
   // chunk, we record its presentation timestamp and the current system time.
   // Then we use this information to estimate when the next audio/video frame
   // should be rendered.
   // TODO(qinmin): Need to fix the problem if audio/video lagged too far behind
   // due to network or decoding problem.
   base::Time start_wallclock_time_;
   base::TimeDelta start_presentation_timestamp_;
 
-  // Decoder jobs.
+  // The surface object currently owned by the player.
+  gfx::ScopedJavaSurface surface_;
+
+  // Decoder jobs
   ScopedMediaDecoderJob audio_decoder_job_;
   ScopedMediaDecoderJob video_decoder_job_;
 
+  bool reconfig_audio_decoder_;
+  bool reconfig_video_decoder_;
+
   // These variables keep track of the current decoding data.
   // TODO(qinmin): remove these variables when we no longer relies on IPC for
   // data passing.
   size_t audio_access_unit_index_;
   size_t video_access_unit_index_;
   bool waiting_for_audio_data_;
   bool waiting_for_video_data_;
   MediaPlayerHostMsg_ReadFromDemuxerAck_Params received_audio_;
   MediaPlayerHostMsg_ReadFromDemuxerAck_Params received_video_;
 
-  // Whether the video decoder need to use anempty surface.
-  bool use_empty_surface_;
-
   // Weak pointer passed to media decoder jobs for callbacks.
   base::WeakPtrFactory<MediaSourcePlayer> weak_this_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaSourcePlayer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_MEDIA_SOURCE_PLAYER_H_