87 lines
2.9 KiB
C
87 lines
2.9 KiB
C
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/*
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* Immersive Audio Model and Formats parsing
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* Copyright (c) 2023 James Almer <jamrial@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVFORMAT_IAMF_PARSE_H
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#define AVFORMAT_IAMF_PARSE_H
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#include <stdint.h>
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#include "avio.h"
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#define MAX_IAMF_OBU_HEADER_SIZE (1 + 8 * 3)
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// OBU types (section 3.2).
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enum IAMF_OBU_Type {
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IAMF_OBU_IA_CODEC_CONFIG = 0,
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IAMF_OBU_IA_AUDIO_ELEMENT = 1,
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IAMF_OBU_IA_MIX_PRESENTATION = 2,
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IAMF_OBU_IA_PARAMETER_BLOCK = 3,
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IAMF_OBU_IA_TEMPORAL_DELIMITER = 4,
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IAMF_OBU_IA_AUDIO_FRAME = 5,
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IAMF_OBU_IA_AUDIO_FRAME_ID0 = 6,
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IAMF_OBU_IA_AUDIO_FRAME_ID1 = 7,
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IAMF_OBU_IA_AUDIO_FRAME_ID2 = 8,
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IAMF_OBU_IA_AUDIO_FRAME_ID3 = 9,
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IAMF_OBU_IA_AUDIO_FRAME_ID4 = 10,
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IAMF_OBU_IA_AUDIO_FRAME_ID5 = 11,
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IAMF_OBU_IA_AUDIO_FRAME_ID6 = 12,
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IAMF_OBU_IA_AUDIO_FRAME_ID7 = 13,
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IAMF_OBU_IA_AUDIO_FRAME_ID8 = 14,
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IAMF_OBU_IA_AUDIO_FRAME_ID9 = 15,
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IAMF_OBU_IA_AUDIO_FRAME_ID10 = 16,
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IAMF_OBU_IA_AUDIO_FRAME_ID11 = 17,
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IAMF_OBU_IA_AUDIO_FRAME_ID12 = 18,
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IAMF_OBU_IA_AUDIO_FRAME_ID13 = 19,
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IAMF_OBU_IA_AUDIO_FRAME_ID14 = 20,
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IAMF_OBU_IA_AUDIO_FRAME_ID15 = 21,
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IAMF_OBU_IA_AUDIO_FRAME_ID16 = 22,
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IAMF_OBU_IA_AUDIO_FRAME_ID17 = 23,
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// 24~30 reserved.
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IAMF_OBU_IA_SEQUENCE_HEADER = 31,
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};
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typedef struct IAMFCodecConfig {
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unsigned codec_config_id;
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enum AVCodecID codec_id;
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uint32_t codec_tag;
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unsigned nb_samples;
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int audio_roll_distance;
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int sample_rate;
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int extradata_size;
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uint8_t *extradata;
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} IAMFCodecConfig;
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typedef struct IAMFContext {
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IAMFCodecConfig **codec_configs;
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int nb_codec_configs;
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} IAMFContext;
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int ff_iamf_parse_obu_header(const uint8_t *buf, int buf_size,
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unsigned *obu_size, int *start_pos, enum IAMF_OBU_Type *type,
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unsigned *skip_samples, unsigned *discard_padding);
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int ff_iamfdec_read_descriptors(IAMFContext *c, AVIOContext *pb,
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int size, void *log_ctx);
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void ff_iamf_uninit_context(IAMFContext *c);
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#endif /* AVFORMAT_IAMF_PARSE_H */
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