Refactor MSE implementation on Android to simplify the logic and improve the performance

media/base/android/demuxer_android.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_BASE_ANDROID_DEMUXER_ANDROID_H_
 #define MEDIA_BASE_ANDROID_DEMUXER_ANDROID_H_
 
 #include "base/basictypes.h"
 #include "base/time/time.h"
 #include "media/base/demuxer_stream.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
 class DemuxerAndroidClient;
 struct DemuxerConfigs;
 struct DemuxerData;
 
 // Defines a demuxer with asynchronous operations.
 class MEDIA_EXPORT DemuxerAndroid {
  public:
   virtual ~DemuxerAndroid() {}
 
   // Initializes this demuxer with |client| as the callback handler.
   // Must be called prior to calling any other methods.
   virtual void Initialize(DemuxerAndroidClient* client) = 0;
 
-  // Called to request the current audio/video decoder configurations.
-  virtual void RequestDemuxerConfigs() = 0;
-
   // Called to request additional data from the demuxer.
   virtual void RequestDemuxerData(media::DemuxerStream::Type type) = 0;
 
   // Called to request the demuxer to seek to a particular media time.
   // |is_browser_seek| is true if the renderer is not previously expecting this
   // seek and must coordinate with other regular seeks. Browser seek existence
   // should be hidden as much as possible from the renderer player and web apps.
   // TODO(wolenetz): Instead of doing browser seek, replay cached data since
   // last keyframe. See http://crbug.com/304234.
   virtual void RequestDemuxerSeek(const base::TimeDelta& time_to_seek,
@@ skipping 26 matching lines @@
   // Called whenever the demuxer has detected a duration change.
   virtual void OnDemuxerDurationChanged(base::TimeDelta duration) = 0;
 
  protected:
   virtual ~DemuxerAndroidClient() {}
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_DEMUXER_ANDROID_H_