Add callback in VideoDecoder and AudioDecoder to return decoded frames.

media/filters/decoder_stream_traits.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_FILTERS_DECODER_STREAM_TRAITS_H_
 #define MEDIA_FILTERS_DECODER_STREAM_TRAITS_H_
 
 #include "media/base/demuxer_stream.h"
 #include "media/base/pipeline_status.h"
 
@@ skipping 10 matching lines @@
 template <DemuxerStream::Type StreamType>
 struct DecoderStreamTraits {};
 
 template <>
 struct DecoderStreamTraits<DemuxerStream::AUDIO> {
   typedef AudioBuffer OutputType;
   typedef AudioDecoder DecoderType;
   typedef AudioDecoderConfig DecoderConfigType;
   typedef DecryptingAudioDecoder DecryptingDecoderType;
   typedef base::Callback<void(bool success)> StreamInitCB;
+  typedef base::Callback<void(const scoped_refptr<OutputType>&)> OutputCB;
 
   static std::string ToString();
   static void Initialize(DecoderType* decoder,
                          const DecoderConfigType& config,
                          bool low_delay,
-                         const PipelineStatusCB& status_cb);
+                         const PipelineStatusCB& status_cb,
+                         const OutputCB& output_cb);
   static bool FinishInitialization(const StreamInitCB& init_cb,
                                    DecoderType* decoder,
                                    DemuxerStream* stream);
   static void ReportStatistics(const StatisticsCB& statistics_cb,
                                int bytes_decoded);
   static DecoderConfigType GetDecoderConfig(DemuxerStream& stream);
 };
 
 template <>
 struct DecoderStreamTraits<DemuxerStream::VIDEO> {
   typedef VideoFrame OutputType;
   typedef VideoDecoder DecoderType;
   typedef VideoDecoderConfig DecoderConfigType;
   typedef DecryptingVideoDecoder DecryptingDecoderType;
   typedef base::Callback<void(bool success)> StreamInitCB;
+  typedef base::Callback<void(const scoped_refptr<OutputType>&)> OutputCB;
 
   static std::string ToString();
   static void Initialize(DecoderType* decoder,
                          const DecoderConfigType& config,
                          bool low_delay,
-                         const PipelineStatusCB& status_cb);
+                         const PipelineStatusCB& status_cb,
+                         const OutputCB& output_cb);
   static bool FinishInitialization(const StreamInitCB& init_cb,
                                    DecoderType* decoder,
                                    DemuxerStream* stream);
   static void ReportStatistics(const StatisticsCB& statistics_cb,
                                int bytes_decoded);
   static DecoderConfigType GetDecoderConfig(DemuxerStream& stream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_DECODER_STREAM_TRAITS_H_