MSE: Add StreamParser buffer remuxing utility and tests

media/formats/mp3/mp3_stream_parser.cc

 // Copyright 2014 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/formats/mp3/mp3_stream_parser.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/message_loop/message_loop.h"
 #include "media/base/bit_reader.h"
@@ skipping 400 matching lines @@
     VideoDecoderConfig video_config;
     bool success = config_cb_.Run(config_, video_config, TextTrackConfigMap());
 
     if (!init_cb_.is_null())
       base::ResetAndReturn(&init_cb_).Run(success, kInfiniteDuration());
 
     if (!success)
       return -1;
   }
 
+  // TODO(wolenetz/acolwell): Validate and use a common cross-parser TrackId
+  // type and allow multiple audio tracks, if applicable. See
+  // https://crbug.com/341581.
   scoped_refptr<StreamParserBuffer> buffer =
-      StreamParserBuffer::CopyFrom(data, frame_size, true);
+      StreamParserBuffer::CopyFrom(data, frame_size, true,
+                                   DemuxerStream::AUDIO, 0);
   buffer->set_timestamp(timestamp_helper_->GetTimestamp());
   buffer->set_duration(timestamp_helper_->GetFrameDuration(sample_count));
   buffers->push_back(buffer);
 
   timestamp_helper_->AddFrames(sample_count);
 
   return frame_size;
 }
 
 static int LocateEndOfHeaders(const uint8_t* buf, int buf_len, int i) {
@@ skipping 172 matching lines @@
 
   if (end_of_segment) {
     in_media_segment_ = false;
     end_of_segment_cb_.Run();
   }
 
   return true;
 }
 
 }  // namespace media