Implement support for multiple tracks in FFmpegDemuxer

media/filters/ffmpeg_demuxer.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.
 
 // Implements the Demuxer interface using FFmpeg's libavformat.  At this time
 // will support demuxing any audio/video format thrown at it.  The streams
 // output mime types audio/x-ffmpeg and video/x-ffmpeg and include an integer
 // key FFmpegCodecID which contains the CodecID enumeration value.  The CodecIDs
 // can be used to create and initialize the corresponding FFmpeg decoder.
 //
@@ skipping 14 matching lines @@
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
-#include "base/memory/scoped_vector.h"
 #include "base/threading/thread.h"
 #include "media/base/audio_decoder_config.h"
 #include "media/base/decoder_buffer.h"
 #include "media/base/decoder_buffer_queue.h"
 #include "media/base/demuxer.h"
 #include "media/base/pipeline_status.h"
 #include "media/base/text_track_config.h"
 #include "media/base/video_decoder_config.h"
 #include "media/ffmpeg/ffmpeg_deleters.h"
 #include "media/filters/blocking_url_protocol.h"
 
 // FFmpeg forward declarations.
+struct AVFormatContext;
 struct AVPacket;
 struct AVRational;
 struct AVStream;
 
 namespace media {
 
 class MediaLog;
 class FFmpegBitstreamConverter;
 class FFmpegDemuxer;
 class FFmpegGlue;
@@ skipping 184 matching lines @@
   base::TimeDelta start_time() const { return start_time_; }
 
  private:
   // To allow tests access to privates.
   friend class FFmpegDemuxerTest;
 
   // FFmpeg callbacks during initialization.
   void OnOpenContextDone(const PipelineStatusCB& status_cb, bool result);
   void OnFindStreamInfoDone(const PipelineStatusCB& status_cb, int result);
 
+  void LogMetadata(AVFormatContext* avctx, base::TimeDelta max_duration);
+
   // FFmpeg callbacks during seeking.
   void OnSeekFrameDone(const PipelineStatusCB& cb, int result);
 
   // FFmpeg callbacks during reading + helper method to initiate reads.
   void ReadFrameIfNeeded();
   void OnReadFrameDone(ScopedAVPacket packet, int result);
 
   // Returns true iff any stream has additional capacity. Note that streams can
   // go over capacity depending on how the file is muxed.
   bool StreamsHaveAvailableCapacity();
@@ skipping 36 matching lines @@
 
   // |streams_| mirrors the AVStream array in AVFormatContext. It contains
   // FFmpegDemuxerStreams encapsluating AVStream objects at the same index.
   //
   // Since we only support a single audio and video stream, |streams_| will
   // contain NULL entries for additional audio/video streams as well as for
   // stream types that we do not currently support.
   //
   // Once initialized, operations on FFmpegDemuxerStreams should be carried out
   // on the demuxer thread.
-  typedef ScopedVector<FFmpegDemuxerStream> StreamVector;
+  using StreamVector = std::vector<std::unique_ptr<FFmpegDemuxerStream>>;
   StreamVector streams_;
 
   // Provides asynchronous IO to this demuxer. Consumed by |url_protocol_| to
   // integrate with libavformat.
   DataSource* data_source_;
 
   scoped_refptr<MediaLog> media_log_;
 
   // Derived bitrate after initialization has completed.
   int bitrate_;
@@ skipping 21 matching lines @@
   bool duration_known_;
 
   // FFmpegURLProtocol implementation and corresponding glue bits.
   std::unique_ptr<BlockingUrlProtocol> url_protocol_;
   std::unique_ptr<FFmpegGlue> glue_;
 
   const EncryptedMediaInitDataCB encrypted_media_init_data_cb_;
 
   const MediaTracksUpdatedCB media_tracks_updated_cb_;
 
-  std::map<MediaTrack::Id, const DemuxerStream*> track_id_to_demux_stream_map_;
+  std::map<MediaTrack::Id, DemuxerStream*> track_id_to_demux_stream_map_;
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<FFmpegDemuxer> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FFMPEG_DEMUXER_H_