Render inband text tracks in the media pipeline

media/filters/source_buffer_stream.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.
 
 // SourceBufferStream is a data structure that stores media Buffers in ranges.
 // Buffers can be appended out of presentation order. Buffers are retrieved by
 // seeking to the desired start point and calling GetNextBuffer(). Buffers are
 // returned in sequential presentation order.
 
 #ifndef MEDIA_FILTERS_SOURCE_BUFFER_STREAM_H_
@@ skipping 31 matching lines @@
     kSuccess,
     kNeedBuffer,
     kConfigChange,
     kEndOfStream
   };
 
   SourceBufferStream(const AudioDecoderConfig& audio_config,
                      const LogCB& log_cb);
   SourceBufferStream(const VideoDecoderConfig& video_config,
                      const LogCB& log_cb);
+  explicit SourceBufferStream(const LogCB& log_cb);
 
   ~SourceBufferStream();
 
   // Signals that the next buffers appended are part of a new media segment
   // starting at |media_segment_start_time|.
   void OnNewMediaSegment(base::TimeDelta media_segment_start_time);
 
   // Add the |buffers| to the SourceBufferStream. Buffers within the queue are
   // expected to be in order, but multiple calls to Append() may add buffers out
   // of order or overlapping. Assumes all buffers within |buffers| are in
@@ skipping 301 matching lines @@
   // config. GetNextBuffer() must not be called again until
   // GetCurrentXXXDecoderConfig() has been called.
   bool config_change_pending_;
 
   DISALLOW_COPY_AND_ASSIGN(SourceBufferStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_SOURCE_BUFFER_STREAM_H_