Wire up codec_delay() to MP3StreamParser and FFmpegAudioDecoder.

media/formats/mpeg/mpeg_audio_stream_parser_base.h

 // 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.
 
 #ifndef MEDIA_FORMATS_MPEG_MPEG_AUDIO_STREAM_PARSER_BASE_H_
 #define MEDIA_FORMATS_MPEG_MPEG_AUDIO_STREAM_PARSER_BASE_H_
 
 #include <set>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "media/base/audio_decoder_config.h"
 #include "media/base/audio_timestamp_helper.h"
 #include "media/base/bit_reader.h"
 #include "media/base/byte_queue.h"
 #include "media/base/media_export.h"
 #include "media/base/stream_parser.h"
 
 namespace media {
 
 class MEDIA_EXPORT MPEGAudioStreamParserBase : public StreamParser {
  public:
   // |start_code_mask| is used to find the start of each frame header.  Also
   // referred to as the sync code in the MP3 and ADTS header specifications.
-  MPEGAudioStreamParserBase(uint32 start_code_mask, AudioCodec audio_codec);
+  // |codec_delay_in_frames| is the number of silent samples the decoder will
+  // output before the first real frame.
+  MPEGAudioStreamParserBase(uint32 start_code_mask,
+                            AudioCodec audio_codec,
+                            int codec_delay_in_frames);
   virtual ~MPEGAudioStreamParserBase();
 
   // StreamParser implementation.
   virtual void Init(const InitCB& init_cb,
                     const NewConfigCB& config_cb,
                     const NewBuffersCB& new_buffers_cb,
                     bool ignore_text_tracks,
                     const NeedKeyCB& need_key_cb,
                     const NewMediaSegmentCB& new_segment_cb,
                     const base::Closure& end_of_segment_cb,
@@ skipping 90 matching lines @@
   base::Closure end_of_segment_cb_;
   LogCB log_cb_;
 
   ByteQueue queue_;
 
   AudioDecoderConfig config_;
   scoped_ptr<AudioTimestampHelper> timestamp_helper_;
   bool in_media_segment_;
   const uint32 start_code_mask_;
   const AudioCodec audio_codec_;
+  const int codec_delay_in_frames_;
 
   DISALLOW_COPY_AND_ASSIGN(MPEGAudioStreamParserBase);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FORMATS_MPEG_MPEG_AUDIO_STREAM_PARSER_BASE_H_