MSE: Record counts of detected MSE audio, video and text tracks

media/base/stream_parser.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_BASE_STREAM_PARSER_H_
 #define MEDIA_BASE_STREAM_PARSER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 34 matching lines @@
   // bytestream-specific-ranged track numbers. See http://crbug.com/341581.
   typedef int TrackId;
 
   // Map of text track ID to the track configuration.
   typedef std::map<TrackId, TextTrackConfig> TextTrackConfigMap;
 
   // Map of text track ID to decode-timestamp-ordered buffers for the track.
   typedef std::map<TrackId, const BufferQueue> TextBufferQueueMap;
 
   // Stream parameters passed in InitCB.
-  struct InitParameters {
+  struct MEDIA_EXPORT InitParameters {
     InitParameters(base::TimeDelta duration);
 
     // Stream duration.
     base::TimeDelta duration;
 
     // Indicates the source time associated with presentation timestamp 0. A
     // null Time is returned if no mapping to Time exists.
     base::Time timeline_offset;
 
     // Indicates that timestampOffset should be updated based on the earliest
     // end timestamp (audio or video) provided during each NewBuffersCB.
     bool auto_update_timestamp_offset;
 
     // Indicates live stream.
     DemuxerStream::Liveness liveness;
+
+    // Counts of tracks detected by type within this stream. Not all of these
+    // tracks may be selected for use by the parser.
+    int detected_audio_track_count;
+    int detected_video_track_count;
+    int detected_text_track_count;
   };
 
   // Indicates completion of parser initialization.
   //   params - Stream parameters.
   typedef base::Callback<void(const InitParameters& params)> InitCB;
 
   // Indicates when new stream configurations have been parsed.
   // First parameter - An object containing information about media tracks as
   //                   well as audio/video decoder configs associated with each
-  //                   track.
+  //                   track the parser will use from the stream.
   // Second parameter - The new text tracks configuration.  If the map is empty,
-  //                    then no text tracks were parsed from the stream.
+  //                    then no text tracks were parsed for use from the stream.
   // Return value - True if the new configurations are accepted.
   //                False if the new configurations are not supported
   //                and indicates that a parsing error should be signalled.
   typedef base::Callback<bool(scoped_ptr<MediaTracks>,
                               const TextTrackConfigMap&)>
       NewConfigCB;
 
   // New stream buffers have been parsed.
   // First parameter - A queue of newly parsed audio buffers.
   // Second parameter - A queue of newly parsed video buffers.
@@ skipping 67 matching lines @@
 // subtle issues with tie-breaking. See http://crbug.com/338484.
 MEDIA_EXPORT bool MergeBufferQueues(
     const StreamParser::BufferQueue& audio_buffers,
     const StreamParser::BufferQueue& video_buffers,
     const StreamParser::TextBufferQueueMap& text_buffers,
     StreamParser::BufferQueue* merged_buffers);
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_STREAM_PARSER_H_