media/filters/decoder_stream_traits.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_FILTERS_DECODER_STREAM_TRAITS_H_
   6 #define MEDIA_FILTERS_DECODER_STREAM_TRAITS_H_
   7
   8 #include "media/base/demuxer_stream.h"
   9 #include "media/base/pipeline_status.h"
  10
  11 namespace media {
  12
  13 class AudioBuffer;
  14 class AudioDecoder;
  15 class DecryptingAudioDecoder;
  16 class DecryptingVideoDecoder;
  17 class DemuxerStream;
  18 class VideoDecoder;
  19 class VideoFrame;
  20
  21 template <DemuxerStream::Type StreamType>
  22 struct DecoderStreamTraits {};
  23
  24 template <>
  25 struct DecoderStreamTraits<DemuxerStream::AUDIO> {
  26   typedef AudioBuffer OutputType;
  27   typedef AudioDecoder DecoderType;
  28   typedef DecryptingAudioDecoder DecryptingDecoderType;
  29   typedef base::Callback<void(bool success)> StreamInitCB;
  30   typedef base::Callback<void(const scoped_refptr<OutputType>&)> OutputCB;
  31
  32   static std::string ToString();
  33   static void InitializeDecoder(DecoderType* decoder,
  34                                 DemuxerStream* stream,
  35                                 const PipelineStatusCB& status_cb,
  36                                 const OutputCB& output_cb);
  37   static bool NeedsBitstreamConversion(DecoderType* decoder) { return false; }
  38   static void ReportStatistics(const StatisticsCB& statistics_cb,
  39                                int bytes_decoded);
  40   static scoped_refptr<OutputType> CreateEOSOutput();
  41 };
  42
  43 template <>
  44 struct DecoderStreamTraits<DemuxerStream::VIDEO> {
  45   typedef VideoFrame OutputType;
  46   typedef VideoDecoder DecoderType;
  47   typedef DecryptingVideoDecoder DecryptingDecoderType;
  48   typedef base::Callback<void(bool success)> StreamInitCB;
  49   typedef base::Callback<void(const scoped_refptr<OutputType>&)> OutputCB;
  50
  51   static std::string ToString();
  52   static void InitializeDecoder(DecoderType* decoder,
  53                                 DemuxerStream* stream,
  54                                 const PipelineStatusCB& status_cb,
  55                                 const OutputCB& output_cb);
  56   static bool NeedsBitstreamConversion(DecoderType* decoder);
  57   static void ReportStatistics(const StatisticsCB& statistics_cb,
  58                                int bytes_decoded);
  59   static scoped_refptr<OutputType> CreateEOSOutput();
  60 };
  61
  62 }  // namespace media
  63
  64 #endif  // MEDIA_FILTERS_DECODER_STREAM_TRAITS_H_