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