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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_ADTS_H_
#define MEDIA_FORMATS_MP2T_ES_PARSER_ADTS_H_
#include <stdint.h>
#include <memory>
#include <utility>
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "media/base/audio_decoder_config.h"
#include "media/base/decrypt_config.h"
#include "media/base/media_export.h"
#include "media/formats/mp2t/es_parser.h"
#include "media/formats/mpeg/adts_stream_parser.h"
#include "media/media_buildflags.h"
namespace media {
class AudioTimestampHelper;
}
namespace media {
namespace mp2t {
class MEDIA_EXPORT EsParserAdts : public EsParser {
public:
using NewAudioConfigCB =
base::RepeatingCallback<void(const AudioDecoderConfig&)>;
EsParserAdts(NewAudioConfigCB new_audio_config_cb,
EmitBufferCB emit_buffer_cb,
bool sbr_in_mimetype);
#if BUILDFLAG(ENABLE_HLS_SAMPLE_AES)
EsParserAdts(NewAudioConfigCB new_audio_config_cb,
EmitBufferCB emit_buffer_cb,
GetDecryptConfigCB get_decrypt_config_cb,
EncryptionScheme init_encryption_scheme,
bool sbr_in_mimetype);
#endif
EsParserAdts(const EsParserAdts&) = delete;
EsParserAdts& operator=(const EsParserAdts&) = delete;
~EsParserAdts() override;
// EsParser implementation.
void Flush() override;
private:
struct AdtsFrame;
// EsParser implementation.
bool ParseFromEsQueue() override;
void ResetInternal() override;
// Synchronize the stream on an ADTS syncword (consuming bytes from
// |es_queue_| if needed).
// Returns true when a full ADTS frame has been found: in that case
// |adts_frame| structure is filled up accordingly.
// Returns false otherwise (no ADTS syncword found or partial ADTS frame).
bool LookForAdtsFrame(AdtsFrame* adts_frame);
// Skip an ADTS frame in the ES queue.
void SkipAdtsFrame(const AdtsFrame& adts_frame);
// 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_t* adts_header, int size);
#if BUILDFLAG(ENABLE_HLS_SAMPLE_AES)
void CalculateSubsamplesForAdtsFrame(const AdtsFrame& adts_frame,
std::vector<SubsampleEntry>* subsamples);
#endif
// Callbacks:
// - to signal a new audio configuration,
// - to send ES buffers.
NewAudioConfigCB new_audio_config_cb_;
EmitBufferCB emit_buffer_cb_;
#if BUILDFLAG(ENABLE_HLS_SAMPLE_AES)
// - to obtain the current decrypt_config.
GetDecryptConfigCB get_decrypt_config_cb_;
const EncryptionScheme init_encryption_scheme_;
#endif
// True when AAC SBR extension is signalled in the mimetype
// (mp4a.40.5 in the codecs parameter).
bool sbr_in_mimetype_;
// Interpolated PTS for frames that don't have one.
std::unique_ptr<AudioTimestampHelper> audio_timestamp_helper_;
// Last audio config.
AudioDecoderConfig last_audio_decoder_config_;
ADTSStreamParser adts_parser_;
};
} // namespace mp2t
} // namespace media
#endif // MEDIA_FORMATS_MP2T_ES_PARSER_ADTS_H_
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