58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
// Copyright 2017 Google Inc. All rights reserved.
|
|
//
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file or at
|
|
// https://developers.google.com/open-source/licenses/bsd
|
|
|
|
#ifndef PACKAGER_MEDIA_FORMATS_MP2T_AC3_HEADER_H_
|
|
#define PACKAGER_MEDIA_FORMATS_MP2T_AC3_HEADER_H_
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <vector>
|
|
|
|
#include "packager/media/formats/mp2t/audio_header.h"
|
|
|
|
namespace shaka {
|
|
namespace media {
|
|
namespace mp2t {
|
|
|
|
/// Class which parses AC3 frame (header / metadata) and synthesizes
|
|
/// AudioSpecificConfig from audio frame content.
|
|
class Ac3Header : public AudioHeader {
|
|
public:
|
|
Ac3Header() = default;
|
|
~Ac3Header() override = default;
|
|
|
|
/// @name AudioHeader implementation overrides.
|
|
/// @{
|
|
bool IsSyncWord(const uint8_t* buf) const override;
|
|
size_t GetMinFrameSize() const override;
|
|
size_t GetSamplesPerFrame() const override;
|
|
bool Parse(const uint8_t* adts_frame, size_t adts_frame_size) override;
|
|
size_t GetHeaderSize() const override;
|
|
size_t GetFrameSize() const override;
|
|
void GetAudioSpecificConfig(std::vector<uint8_t>* buffer) const override;
|
|
uint8_t GetObjectType() const override;
|
|
uint32_t GetSamplingFrequency() const override;
|
|
uint8_t GetNumChannels() const override;
|
|
/// @}
|
|
|
|
private:
|
|
Ac3Header(const Ac3Header&) = delete;
|
|
Ac3Header& operator=(const Ac3Header&) = delete;
|
|
|
|
uint8_t fscod_ = 0; // Sample rate code
|
|
uint8_t frmsizecod_ = 0; // Frame size code
|
|
uint8_t bsid_ = 0; // Bit stream identification
|
|
uint8_t bsmod_ = 0; // Bit stream mode
|
|
uint8_t acmod_ = 0; // Audio coding mode
|
|
uint8_t lfeon_ = 0; // Low frequency effects channel on
|
|
};
|
|
|
|
} // namespace mp2t
|
|
} // namespace media
|
|
} // namespace shaka
|
|
|
|
#endif // PACKAGER_MEDIA_FORMATS_MP2T_AC3_HEADER_H_
|