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// 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_FORMATS_MP2T_ES_PARSER_MPEG1AUDIO_H_
#define MEDIA_FORMATS_MP2T_ES_PARSER_MPEG1AUDIO_H_
#include <stdint.h>
#include <list>
#include <memory>
#include <utility>
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/time/time.h"
#include "media/base/audio_decoder_config.h"
#include "media/base/media_export.h"
#include "media/base/media_log.h"
#include "media/formats/mp2t/es_parser.h"
namespace media {
class AudioTimestampHelper;
}
namespace media {
namespace mp2t {
class MEDIA_EXPORT EsParserMpeg1Audio : public EsParser {
public:
using NewAudioConfigCB =
base::RepeatingCallback<void(const AudioDecoderConfig&)>;
EsParserMpeg1Audio(const NewAudioConfigCB& new_audio_config_cb,
EmitBufferCB emit_buffer_cb,
MediaLog* media_log);
EsParserMpeg1Audio(const EsParserMpeg1Audio&) = delete;
EsParserMpeg1Audio& operator=(const EsParserMpeg1Audio&) = delete;
~EsParserMpeg1Audio() override;
// EsParser implementation.
void Flush() override;
private:
// Used to link a PTS with a byte position in the ES stream.
typedef std::pair<int64_t, base::TimeDelta> EsPts;
typedef std::list<EsPts> EsPtsList;
struct Mpeg1AudioFrame;
// EsParser implementation.
bool ParseFromEsQueue() override;
void ResetInternal() override;
// Synchronize the stream on a Mpeg1 audio syncword (consuming bytes from
// |es_queue_| if needed).
// Returns true when a full Mpeg1 audio frame has been found: in that case
// |mpeg1audio_frame| structure is filled up accordingly.
// Returns false otherwise (no Mpeg1 audio syncword found or partial Mpeg1
// audio frame).
bool LookForMpeg1AudioFrame(Mpeg1AudioFrame* mpeg1audio_frame);
// Signal any audio configuration change (if any).
// Return false if the current audio config is not
// a supported Mpeg1 audio config.
bool UpdateAudioConfiguration(const uint8_t* mpeg1audio_header);
void SkipMpeg1AudioFrame(const Mpeg1AudioFrame& mpeg1audio_frame);
MediaLog* media_log_;
size_t mp3_parse_error_limit_ = 0;
// Callbacks:
// - to signal a new audio configuration,
// - to send ES buffers.
NewAudioConfigCB new_audio_config_cb_;
EmitBufferCB emit_buffer_cb_;
// Interpolated PTS for frames that don't have one.
std::unique_ptr<AudioTimestampHelper> audio_timestamp_helper_;
// Last audio config.
AudioDecoderConfig last_audio_decoder_config_;
};
} // namespace mp2t
} // namespace media
#endif // MEDIA_FORMATS_MP2T_ES_PARSER_MPEG1AUDIO_H_
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