87 lines
2.3 KiB
C++
87 lines
2.3 KiB
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef MEDIA_FORMATS_MP2T_ES_PARSER_ADTS_H_
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#define MEDIA_FORMATS_MP2T_ES_PARSER_ADTS_H_
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#include <list>
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#include <utility>
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#include "base/callback.h"
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#include "base/compiler_specific.h"
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#include "base/memory/scoped_ptr.h"
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#include "base/time/time.h"
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#include "media/base/audio_decoder_config.h"
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#include "media/base/byte_queue.h"
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#include "media/formats/mp2t/es_parser.h"
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namespace media {
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class AudioTimestampHelper;
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class BitReader;
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class StreamParserBuffer;
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}
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namespace media {
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namespace mp2t {
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class EsParserAdts : public EsParser {
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public:
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typedef base::Callback<void(const AudioDecoderConfig&)> NewAudioConfigCB;
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EsParserAdts(const NewAudioConfigCB& new_audio_config_cb,
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const EmitBufferCB& emit_buffer_cb,
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bool sbr_in_mimetype);
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virtual ~EsParserAdts();
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// EsParser implementation.
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virtual bool Parse(const uint8* buf, int size,
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base::TimeDelta pts,
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base::TimeDelta dts) OVERRIDE;
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virtual void Flush() OVERRIDE;
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virtual void Reset() OVERRIDE;
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private:
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// Used to link a PTS with a byte position in the ES stream.
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typedef std::pair<int, base::TimeDelta> EsPts;
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typedef std::list<EsPts> EsPtsList;
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// Signal any audio configuration change (if any).
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// Return false if the current audio config is not
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// a supported ADTS audio config.
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bool UpdateAudioConfiguration(const uint8* adts_header);
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// Discard some bytes from the ES stream.
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void DiscardEs(int nbytes);
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// Callbacks:
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// - to signal a new audio configuration,
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// - to send ES buffers.
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NewAudioConfigCB new_audio_config_cb_;
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EmitBufferCB emit_buffer_cb_;
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// True when AAC SBR extension is signalled in the mimetype
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// (mp4a.40.5 in the codecs parameter).
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bool sbr_in_mimetype_;
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// Bytes of the ES stream that have not been emitted yet.
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ByteQueue es_byte_queue_;
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// List of PTS associated with a position in the ES stream.
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EsPtsList pts_list_;
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// Interpolated PTS for frames that don't have one.
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scoped_ptr<AudioTimestampHelper> audio_timestamp_helper_;
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// Last audio config.
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AudioDecoderConfig last_audio_decoder_config_;
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DISALLOW_COPY_AND_ASSIGN(EsParserAdts);
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};
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} // namespace mp2t
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} // namespace media
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#endif
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