Generate and assign media track ids in demuxers.

media/filters/chunk_demuxer_unittest.cc

 // 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.
 
 #include "media/filters/chunk_demuxer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <algorithm>
 #include <utility>
@@ skipping 1387 matching lines @@
 
   // Map of source id to timestamp offset to use for the next AppendData()
   // operation for that source id.
   std::map<std::string, base::TimeDelta> timestamp_offset_map_;
 
  public:
   void InitSegmentReceived(std::unique_ptr<MediaTracks> tracks) {
     DCHECK(tracks.get());
     DCHECK_GT(tracks->tracks().size(), 0u);
 
+    // Verify that track ids are unique.
+    std::set<MediaTrack::Id> track_ids;
+    for (const auto& track : tracks->tracks()) {
+      EXPECT_EQ(track_ids.end(), track_ids.find(track->id()));
+      track_ids.insert(track->id());
+    }
+
     InitSegmentReceivedMock(tracks);
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ChunkDemuxerTest);
 };
 
 TEST_F(ChunkDemuxerTest, Init) {
   InSequence s;
 
@@ skipping 3262 matching lines @@
              cluster->size() - video_start);
 
   CheckExpectedRanges(DemuxerStream::AUDIO, "{ [30,90) }");
   CheckExpectedRanges(DemuxerStream::VIDEO, "{ [0,91) }");
   CheckExpectedRanges("{ [30,90) }");
   CheckExpectedBuffers(audio_stream, "30K 40K 50K 60K 70K 80K");
   CheckExpectedBuffers(video_stream, "71K 81");
 }
 
 }  // namespace media