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

media/base/android/demuxer_stream_player_params.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_DEMUXER_STREAM_PLAYER_PARAMS_H_
 #define MEDIA_BASE_ANDROID_DEMUXER_STREAM_PLAYER_PARAMS_H_
 
 #include <vector>
 
 #include "media/base/audio_decoder_config.h"
@@ skipping 36 matching lines @@
   std::vector<char> iv;
   std::vector<media::SubsampleEntry> subsamples;
 };
 
 struct MEDIA_EXPORT DemuxerData {
   DemuxerData();
   ~DemuxerData();
 
   DemuxerStream::Type type;
   std::vector<AccessUnit> access_units;
+  // If the last entry in |access_units| has a status equal to |kConfigChanged|,
+  // a corresponding DemuxerConfigs is added into this vector. The
+  // DemuxerConfigs should only contain information of the stream that is
+  // specified by |type|. This solves the issue that we need multiple IPCs when
+  // demuxer configs change.
+  std::vector<DemuxerConfigs> demuxer_configs;
 };
 
 };  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_DEMUXER_STREAM_PLAYER_PARAMS_H_