| // 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 "base/time/time.h" |
| #include "media/base/cdm_context.h" |
| #include "media/base/demuxer_stream.h" |
| #include "media/base/moving_average.h" |
| #include "media/base/pipeline_status.h" |
| #include "media/base/video_decoder_config.h" |
| #include "media/filters/audio_timestamp_validator.h" |
| |
| namespace media { |
| |
| class AudioBuffer; |
| class AudioDecoder; |
| class CdmContext; |
| class DecryptingAudioDecoder; |
| class DecryptingVideoDecoder; |
| class DemuxerStream; |
| class VideoDecoder; |
| class VideoFrame; |
| |
| template <DemuxerStream::Type StreamType> |
| class DecoderStreamTraits {}; |
| |
| template <> |
| class MEDIA_EXPORT DecoderStreamTraits<DemuxerStream::AUDIO> { |
| public: |
| typedef AudioBuffer OutputType; |
| typedef AudioDecoder DecoderType; |
| typedef DecryptingAudioDecoder DecryptingDecoderType; |
| typedef base::Callback<void(bool success)> InitCB; |
| typedef base::Callback<void(const scoped_refptr<OutputType>&)> OutputCB; |
| |
| static std::string ToString(); |
| static bool NeedsBitstreamConversion(DecoderType* decoder); |
| static scoped_refptr<OutputType> CreateEOSOutput(); |
| |
| explicit DecoderStreamTraits(const scoped_refptr<MediaLog>& media_log); |
| |
| void ReportStatistics(const StatisticsCB& statistics_cb, int bytes_decoded); |
| void InitializeDecoder(DecoderType* decoder, |
| DemuxerStream* stream, |
| CdmContext* cdm_context, |
| const InitCB& init_cb, |
| const OutputCB& output_cb); |
| void OnDecode(const scoped_refptr<DecoderBuffer>& buffer); |
| void OnDecodeDone(const scoped_refptr<OutputType>& buffer); |
| void OnStreamReset(DemuxerStream* stream); |
| |
| private: |
| // Validates encoded timestamps match decoded output duration. MEDIA_LOG warns |
| // if timestamp gaps are detected. Sufficiently large gaps can lead to AV sync |
| // drift. |
| std::unique_ptr<AudioTimestampValidator> audio_ts_validator_; |
| |
| scoped_refptr<MediaLog> media_log_; |
| }; |
| |
| template <> |
| class MEDIA_EXPORT DecoderStreamTraits<DemuxerStream::VIDEO> { |
| public: |
| typedef VideoFrame OutputType; |
| typedef VideoDecoder DecoderType; |
| typedef DecryptingVideoDecoder DecryptingDecoderType; |
| typedef base::Callback<void(bool success)> InitCB; |
| typedef base::Callback<void(const scoped_refptr<OutputType>&)> OutputCB; |
| |
| static std::string ToString(); |
| static bool NeedsBitstreamConversion(DecoderType* decoder); |
| static scoped_refptr<OutputType> CreateEOSOutput(); |
| |
| explicit DecoderStreamTraits(const scoped_refptr<MediaLog>& media_log); |
| |
| void ReportStatistics(const StatisticsCB& statistics_cb, int bytes_decoded); |
| void InitializeDecoder(DecoderType* decoder, |
| DemuxerStream* stream, |
| CdmContext* cdm_context, |
| const InitCB& init_cb, |
| const OutputCB& output_cb); |
| void OnDecode(const scoped_refptr<DecoderBuffer>& buffer); |
| void OnDecodeDone(const scoped_refptr<OutputType>& buffer) {} |
| void OnStreamReset(DemuxerStream* stream); |
| |
| private: |
| base::TimeDelta last_keyframe_timestamp_; |
| MovingAverage keyframe_distance_average_; |
| }; |
| |
| } // namespace media |
| |
| #endif // MEDIA_FILTERS_DECODER_STREAM_TRAITS_H_ |