| // Copyright 2013 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_MP2T_ES_PARSER_ADTS_H_ |
| #define MEDIA_MP2T_ES_PARSER_ADTS_H_ |
| |
| #include <list> |
| #include <utility> |
| |
| #include "base/callback.h" |
| #include "base/compiler_specific.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/time/time.h" |
| #include "media/base/audio_decoder_config.h" |
| #include "media/base/byte_queue.h" |
| #include "media/mp2t/es_parser.h" |
| |
| namespace media { |
| class AudioTimestampHelper; |
| class BitReader; |
| class StreamParserBuffer; |
| } |
| |
| namespace media { |
| namespace mp2t { |
| |
| class EsParserAdts : public EsParser { |
| public: |
| typedef base::Callback<void(const AudioDecoderConfig&)> NewAudioConfigCB; |
| |
| EsParserAdts(const NewAudioConfigCB& new_audio_config_cb, |
| const EmitBufferCB& emit_buffer_cb); |
| virtual ~EsParserAdts(); |
| |
| // EsParser implementation. |
| virtual bool Parse(const uint8* buf, int size, |
| base::TimeDelta pts, |
| base::TimeDelta dts) OVERRIDE; |
| virtual void Flush() OVERRIDE; |
| virtual void Reset() OVERRIDE; |
| |
| private: |
| // Used to link a PTS with a byte position in the ES stream. |
| typedef std::pair<int, base::TimeDelta> EsPts; |
| typedef std::list<EsPts> EsPtsList; |
| |
| // Signal any audio configuration change (if any). |
| // Return false if the current audio config is not |
| // a supported ADTS audio config. |
| bool UpdateAudioConfiguration(const uint8* adts_header); |
| |
| // Discard some bytes from the ES stream. |
| void DiscardEs(int nbytes); |
| |
| // Callbacks: |
| // - to signal a new audio configuration, |
| // - to send ES buffers. |
| NewAudioConfigCB new_audio_config_cb_; |
| EmitBufferCB emit_buffer_cb_; |
| |
| // Bytes of the ES stream that have not been emitted yet. |
| ByteQueue es_byte_queue_; |
| |
| // List of PTS associated with a position in the ES stream. |
| EsPtsList pts_list_; |
| |
| // Interpolated PTS for frames that don't have one. |
| scoped_ptr<AudioTimestampHelper> audio_timestamp_helper_; |
| |
| // Last audio config. |
| AudioDecoderConfig last_audio_decoder_config_; |
| |
| DISALLOW_COPY_AND_ASSIGN(EsParserAdts); |
| }; |
| |
| } // namespace mp2t |
| } // namespace media |
| |
| #endif |
| |