Unify media track info reporting on a demuxer level

media/filters/chunk_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.
 
 #ifndef MEDIA_FILTERS_CHUNK_DEMUXER_H_
 #define MEDIA_FILTERS_CHUNK_DEMUXER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 203 matching lines @@
   // Registers a new |id| to use for AppendData() calls. |type| indicates
   // the MIME type for the data that we intend to append for this ID.
   // kOk is returned if the demuxer has enough resources to support another ID
   //    and supports the format indicated by |type|.
   // kNotSupported is returned if |type| is not a supported format.
   // kReachedIdLimit is returned if the demuxer cannot handle another ID right
   //    now.
   Status AddId(const std::string& id, const std::string& type,
                std::vector<std::string>& codecs);
 
+  // Notifies a caller via |tracks_updated_cb| that the set of media tracks
+  // for a given |id| has changed.
+  void SetTracksWatcher(const std::string& id,
+                        const MediaTracksUpdatedCB& tracks_updated_cb);
+
   // Removed an ID & associated resources that were previously added with
   // AddId().
   void RemoveId(const std::string& id);
 
   // Gets the currently buffered ranges for the specified ID.
   Ranges<base::TimeDelta> GetBufferedRanges(const std::string& id) const;
 
   // Appends media data to the source buffer associated with |id|, applying
   // and possibly updating |*timestamp_offset| during coded frame processing.
   // |append_window_start| and |append_window_end| correspond to the MSE spec's
   // similarly named source buffer attributes that are used in coded frame
   // processing.
-  // |init_segment_received_cb| is run for each newly successfully parsed
-  // initialization segment.
-  void AppendData(
-      const std::string& id,
-      const uint8_t* data,
-      size_t length,
-      base::TimeDelta append_window_start,
-      base::TimeDelta append_window_end,
-      base::TimeDelta* timestamp_offset,
-      const MediaSourceState::InitSegmentReceivedCB& init_segment_received_cb);
+  void AppendData(const std::string& id,
+                  const uint8_t* data,
+                  size_t length,
+                  base::TimeDelta append_window_start,
+                  base::TimeDelta append_window_end,
+                  base::TimeDelta* timestamp_offset);
 
   // Aborts parsing the current segment and reset the parser to a state where
   // it can accept a new segment.
   // Some pending frames can be emitted during that process. These frames are
   // applied |timestamp_offset|.
   void ResetParserState(const std::string& id,
                         base::TimeDelta append_window_start,
                         base::TimeDelta append_window_end,
                         base::TimeDelta* timestamp_offset);
 
@@ skipping 165 matching lines @@
 
   // Indicates that splice frame generation is enabled.
   const bool splice_frames_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(ChunkDemuxer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_CHUNK_DEMUXER_H_