2022-08-26 15:44:59 +00:00
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// Copyright 2020 Google LLC. All rights reserved.
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2020-07-04 21:55:28 +00:00
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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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//
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// AC4 audio utility functions.
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#ifndef PACKAGER_MEDIA_CODECS_AC4_AUDIO_UTIL_H_
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#define PACKAGER_MEDIA_CODECS_AC4_AUDIO_UTIL_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <vector>
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namespace shaka {
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namespace media {
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/// Parse data from AC4Specific box and calculate AC4 channel mask value based
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/// on ETSI TS 103 192-2 V1.2.1 Digital Audio Compression (AC-4) Standard;
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/// Part 2: Immersive and personalized E.10.14.
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/// @return false if there are parsing errors.
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bool CalculateAC4ChannelMask(const std::vector<uint8_t>& ac4_data,
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uint32_t* ac4_channel_mask);
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/// Parse data from AC4Specific box, calculate AC4 channel mask and then
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/// obtain channel configuration descriptor value with MPEG scheme based on
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/// ETSI TS 103 192-2 V1.2.1 Digital Audio Compression (AC-4) Standard;
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/// Part 2: Immersive and personalized G.3.2.
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/// @return false if there are parsing errors.
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bool CalculateAC4ChannelMPEGValue(const std::vector<uint8_t>& ac4_data,
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uint32_t* ac4_channel_mpeg_value);
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/// Parse data from AC4Specific box and obtain AC4 codec information
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/// (bitstream version, presentation version and mdcompat) based on ETSI TS
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/// 103 190-2, V1.2.1 Digital Audio Compression (AC-4) Standard;
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/// Part 2: Immersive and personalized E.13.
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/// @return false if there are parsing errors.
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bool GetAc4CodecInfo(const std::vector<uint8_t>& ac4_data,
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uint8_t* ac4_codec_info);
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/// Parse data from AC4Specific box and obtain AC4 Immersive stereo (IMS) flag
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/// and Channel-base audio (CBI) flag.
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/// @return false if there are parsing errors.
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bool GetAc4ImmersiveInfo(const std::vector<uint8_t>& ac4_data,
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bool* ac4_ims_flag,
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bool* ac4_cbi_flag);
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} // namespace media
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} // namespace shaka
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#endif // PACKAGER_MEDIA_CODECS_AC4_AUDIO_UTIL_H_
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