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1105 lines
41 KiB
1105 lines
41 KiB
/* |
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* Immersive Audio Model and Formats muxing helpers and structs |
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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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|
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#include "libavutil/channel_layout.h" |
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/iamf.h" |
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#include "libavutil/mem.h" |
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#include "libavcodec/get_bits.h" |
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#include "libavcodec/put_bits.h" |
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#include "avformat.h" |
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#include "avio_internal.h" |
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#include "iamf.h" |
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#include "iamf_writer.h" |
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|
|
|
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static int update_extradata(IAMFCodecConfig *codec_config) |
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{ |
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GetBitContext gb; |
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PutBitContext pb; |
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int ret; |
|
|
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switch(codec_config->codec_id) { |
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case AV_CODEC_ID_OPUS: |
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if (codec_config->extradata_size < 19) |
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return AVERROR_INVALIDDATA; |
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codec_config->extradata_size -= 8; |
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memmove(codec_config->extradata, codec_config->extradata + 8, codec_config->extradata_size); |
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AV_WB8(codec_config->extradata + 1, 2); // set channels to stereo |
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break; |
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case AV_CODEC_ID_FLAC: { |
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uint8_t buf[13]; |
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|
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init_put_bits(&pb, buf, sizeof(buf)); |
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ret = init_get_bits8(&gb, codec_config->extradata, codec_config->extradata_size); |
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if (ret < 0) |
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return ret; |
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|
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put_bits32(&pb, get_bits_long(&gb, 32)); // min/max blocksize |
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put_bits64(&pb, 48, get_bits64(&gb, 48)); // min/max framesize |
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put_bits(&pb, 20, get_bits(&gb, 20)); // samplerate |
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skip_bits(&gb, 3); |
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put_bits(&pb, 3, 1); // set channels to stereo |
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ret = put_bits_left(&pb); |
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put_bits(&pb, ret, get_bits(&gb, ret)); |
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flush_put_bits(&pb); |
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|
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memcpy(codec_config->extradata, buf, sizeof(buf)); |
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break; |
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} |
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default: |
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break; |
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} |
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|
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return 0; |
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} |
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|
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static int fill_codec_config(IAMFContext *iamf, const AVStreamGroup *stg, |
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IAMFCodecConfig *codec_config) |
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{ |
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const AVStream *st = stg->streams[0]; |
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IAMFCodecConfig **tmp; |
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int j, ret = 0; |
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|
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codec_config->codec_id = st->codecpar->codec_id; |
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codec_config->sample_rate = st->codecpar->sample_rate; |
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codec_config->codec_tag = st->codecpar->codec_tag; |
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codec_config->nb_samples = st->codecpar->frame_size; |
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codec_config->seek_preroll = st->codecpar->seek_preroll; |
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if (st->codecpar->extradata_size) { |
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codec_config->extradata = av_memdup(st->codecpar->extradata, st->codecpar->extradata_size); |
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if (!codec_config->extradata) |
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return AVERROR(ENOMEM); |
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codec_config->extradata_size = st->codecpar->extradata_size; |
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ret = update_extradata(codec_config); |
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if (ret < 0) |
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goto fail; |
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} |
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|
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for (j = 0; j < iamf->nb_codec_configs; j++) { |
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if (!memcmp(iamf->codec_configs[j], codec_config, offsetof(IAMFCodecConfig, extradata)) && |
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(!codec_config->extradata_size || !memcmp(iamf->codec_configs[j]->extradata, |
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codec_config->extradata, codec_config->extradata_size))) |
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break; |
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} |
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|
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if (j < iamf->nb_codec_configs) { |
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av_free(iamf->codec_configs[j]->extradata); |
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av_free(iamf->codec_configs[j]); |
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iamf->codec_configs[j] = codec_config; |
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return j; |
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} |
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|
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tmp = av_realloc_array(iamf->codec_configs, iamf->nb_codec_configs + 1, sizeof(*iamf->codec_configs)); |
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if (!tmp) { |
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ret = AVERROR(ENOMEM); |
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goto fail; |
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} |
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|
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iamf->codec_configs = tmp; |
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iamf->codec_configs[iamf->nb_codec_configs] = codec_config; |
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codec_config->codec_config_id = iamf->nb_codec_configs; |
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|
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return iamf->nb_codec_configs++; |
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|
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fail: |
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av_freep(&codec_config->extradata); |
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return ret; |
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} |
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|
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static int add_param_definition(IAMFContext *iamf, AVIAMFParamDefinition *param, |
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const IAMFAudioElement *audio_element, void *log_ctx) |
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{ |
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IAMFParamDefinition **tmp, *param_definition; |
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IAMFCodecConfig *codec_config = NULL; |
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|
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tmp = av_realloc_array(iamf->param_definitions, iamf->nb_param_definitions + 1, |
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sizeof(*iamf->param_definitions)); |
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if (!tmp) |
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return AVERROR(ENOMEM); |
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|
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iamf->param_definitions = tmp; |
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|
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if (audio_element) |
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codec_config = iamf->codec_configs[audio_element->codec_config_id]; |
|
|
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if (!param->parameter_rate) { |
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if (!codec_config) { |
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av_log(log_ctx, AV_LOG_ERROR, "parameter_rate needed but not set for parameter_id %u\n", |
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param->parameter_id); |
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return AVERROR(EINVAL); |
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} |
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param->parameter_rate = codec_config->sample_rate; |
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} |
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if (codec_config) { |
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if (!param->duration) |
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param->duration = codec_config->nb_samples; |
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if (!param->constant_subblock_duration) |
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param->constant_subblock_duration = codec_config->nb_samples; |
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} |
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|
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param_definition = av_mallocz(sizeof(*param_definition)); |
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if (!param_definition) |
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return AVERROR(ENOMEM); |
|
|
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param_definition->mode = !!param->duration; |
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param_definition->param = param; |
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param_definition->audio_element = audio_element; |
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iamf->param_definitions[iamf->nb_param_definitions++] = param_definition; |
|
|
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return 0; |
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} |
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|
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int ff_iamf_add_audio_element(IAMFContext *iamf, const AVStreamGroup *stg, void *log_ctx) |
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{ |
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const AVIAMFAudioElement *iamf_audio_element; |
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IAMFAudioElement **tmp, *audio_element; |
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IAMFCodecConfig *codec_config; |
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int ret; |
|
|
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if (stg->type != AV_STREAM_GROUP_PARAMS_IAMF_AUDIO_ELEMENT) |
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return AVERROR(EINVAL); |
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|
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iamf_audio_element = stg->params.iamf_audio_element; |
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if (iamf_audio_element->audio_element_type == AV_IAMF_AUDIO_ELEMENT_TYPE_SCENE) { |
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const AVIAMFLayer *layer = iamf_audio_element->layers[0]; |
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if (iamf_audio_element->nb_layers != 1) { |
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av_log(log_ctx, AV_LOG_ERROR, "Invalid amount of layers for SCENE_BASED audio element. Must be 1\n"); |
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return AVERROR(EINVAL); |
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} |
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if (layer->ch_layout.order != AV_CHANNEL_ORDER_CUSTOM && |
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layer->ch_layout.order != AV_CHANNEL_ORDER_AMBISONIC) { |
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av_log(log_ctx, AV_LOG_ERROR, "Invalid channel layout for SCENE_BASED audio element\n"); |
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return AVERROR(EINVAL); |
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} |
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if (layer->ambisonics_mode >= AV_IAMF_AMBISONICS_MODE_PROJECTION) { |
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av_log(log_ctx, AV_LOG_ERROR, "Unsuported ambisonics mode %d\n", layer->ambisonics_mode); |
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return AVERROR_PATCHWELCOME; |
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} |
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for (int i = 0; i < stg->nb_streams; i++) { |
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if (stg->streams[i]->codecpar->ch_layout.nb_channels > 1) { |
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av_log(log_ctx, AV_LOG_ERROR, "Invalid amount of channels in a stream for MONO mode ambisonics\n"); |
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return AVERROR(EINVAL); |
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} |
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} |
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} else |
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for (int j, i = 0; i < iamf_audio_element->nb_layers; i++) { |
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const AVIAMFLayer *layer = iamf_audio_element->layers[i]; |
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for (j = 0; j < FF_ARRAY_ELEMS(ff_iamf_scalable_ch_layouts); j++) |
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if (!av_channel_layout_compare(&layer->ch_layout, &ff_iamf_scalable_ch_layouts[j])) |
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break; |
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|
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if (j >= FF_ARRAY_ELEMS(ff_iamf_scalable_ch_layouts)) { |
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av_log(log_ctx, AV_LOG_ERROR, "Unsupported channel layout in stream group #%d\n", i); |
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return AVERROR(EINVAL); |
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} |
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} |
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|
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for (int i = 0; i < iamf->nb_audio_elements; i++) { |
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if (stg->id == iamf->audio_elements[i]->audio_element_id) { |
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av_log(log_ctx, AV_LOG_ERROR, "Duplicated Audio Element id %"PRId64"\n", stg->id); |
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return AVERROR(EINVAL); |
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} |
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} |
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|
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codec_config = av_mallocz(sizeof(*codec_config)); |
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if (!codec_config) |
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return AVERROR(ENOMEM); |
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|
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ret = fill_codec_config(iamf, stg, codec_config); |
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if (ret < 0) { |
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av_free(codec_config); |
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return ret; |
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} |
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|
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audio_element = av_mallocz(sizeof(*audio_element)); |
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if (!audio_element) |
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return AVERROR(ENOMEM); |
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|
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audio_element->celement = stg->params.iamf_audio_element; |
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audio_element->audio_element_id = stg->id; |
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audio_element->codec_config_id = ret; |
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|
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audio_element->substreams = av_calloc(stg->nb_streams, sizeof(*audio_element->substreams)); |
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if (!audio_element->substreams) { |
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ret = AVERROR(ENOMEM); |
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goto fail; |
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} |
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audio_element->nb_substreams = stg->nb_streams; |
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|
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audio_element->layers = av_calloc(iamf_audio_element->nb_layers, sizeof(*audio_element->layers)); |
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if (!audio_element->layers) { |
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ret = AVERROR(ENOMEM); |
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goto fail; |
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} |
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|
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for (int i = 0, j = 0; i < iamf_audio_element->nb_layers; i++) { |
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int nb_channels = iamf_audio_element->layers[i]->ch_layout.nb_channels; |
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|
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IAMFLayer *layer = &audio_element->layers[i]; |
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|
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if (i) |
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nb_channels -= iamf_audio_element->layers[i - 1]->ch_layout.nb_channels; |
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for (; nb_channels > 0 && j < stg->nb_streams; j++) { |
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const AVStream *st = stg->streams[j]; |
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IAMFSubStream *substream = &audio_element->substreams[j]; |
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|
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substream->audio_substream_id = st->id; |
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layer->substream_count++; |
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layer->coupled_substream_count += st->codecpar->ch_layout.nb_channels == 2; |
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nb_channels -= st->codecpar->ch_layout.nb_channels; |
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} |
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if (nb_channels) { |
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av_log(log_ctx, AV_LOG_ERROR, "Invalid channel count across substreams in layer %u from stream group %u\n", |
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i, stg->index); |
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ret = AVERROR(EINVAL); |
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goto fail; |
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} |
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} |
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|
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if (iamf_audio_element->demixing_info) { |
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AVIAMFParamDefinition *param = iamf_audio_element->demixing_info; |
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IAMFParamDefinition *param_definition = ff_iamf_get_param_definition(iamf, param->parameter_id); |
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|
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if (param->nb_subblocks != 1) { |
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av_log(log_ctx, AV_LOG_ERROR, "nb_subblocks in demixing_info for stream group %u is not 1\n", stg->index); |
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ret = AVERROR(EINVAL); |
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goto fail; |
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} |
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|
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if (!param_definition) { |
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ret = add_param_definition(iamf, param, audio_element, log_ctx); |
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if (ret < 0) |
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goto fail; |
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} |
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} |
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if (iamf_audio_element->recon_gain_info) { |
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AVIAMFParamDefinition *param = iamf_audio_element->recon_gain_info; |
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IAMFParamDefinition *param_definition = ff_iamf_get_param_definition(iamf, param->parameter_id); |
|
|
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if (param->nb_subblocks != 1) { |
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av_log(log_ctx, AV_LOG_ERROR, "nb_subblocks in recon_gain_info for stream group %u is not 1\n", stg->index); |
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ret = AVERROR(EINVAL); |
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goto fail; |
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} |
|
|
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if (!param_definition) { |
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ret = add_param_definition(iamf, param, audio_element, log_ctx); |
|
if (ret < 0) |
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goto fail; |
|
} |
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} |
|
|
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tmp = av_realloc_array(iamf->audio_elements, iamf->nb_audio_elements + 1, sizeof(*iamf->audio_elements)); |
|
if (!tmp) { |
|
ret = AVERROR(ENOMEM); |
|
goto fail; |
|
} |
|
|
|
iamf->audio_elements = tmp; |
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iamf->audio_elements[iamf->nb_audio_elements++] = audio_element; |
|
|
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return 0; |
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fail: |
|
ff_iamf_free_audio_element(&audio_element); |
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return ret; |
|
} |
|
|
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int ff_iamf_add_mix_presentation(IAMFContext *iamf, const AVStreamGroup *stg, void *log_ctx) |
|
{ |
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IAMFMixPresentation **tmp, *mix_presentation; |
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int ret; |
|
|
|
if (stg->type != AV_STREAM_GROUP_PARAMS_IAMF_MIX_PRESENTATION) |
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return AVERROR(EINVAL); |
|
|
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for (int i = 0; i < iamf->nb_mix_presentations; i++) { |
|
if (stg->id == iamf->mix_presentations[i]->mix_presentation_id) { |
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av_log(log_ctx, AV_LOG_ERROR, "Duplicate Mix Presentation id %"PRId64"\n", stg->id); |
|
return AVERROR(EINVAL); |
|
} |
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} |
|
|
|
mix_presentation = av_mallocz(sizeof(*mix_presentation)); |
|
if (!mix_presentation) |
|
return AVERROR(ENOMEM); |
|
|
|
mix_presentation->cmix = stg->params.iamf_mix_presentation; |
|
mix_presentation->mix_presentation_id = stg->id; |
|
|
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for (int i = 0; i < mix_presentation->cmix->nb_submixes; i++) { |
|
const AVIAMFSubmix *submix = mix_presentation->cmix->submixes[i]; |
|
AVIAMFParamDefinition *param = submix->output_mix_config; |
|
IAMFParamDefinition *param_definition; |
|
|
|
if (!param) { |
|
av_log(log_ctx, AV_LOG_ERROR, "output_mix_config is not present in submix %u from " |
|
"Mix Presentation ID %"PRId64"\n", i, stg->id); |
|
ret = AVERROR(EINVAL); |
|
goto fail; |
|
} |
|
|
|
param_definition = ff_iamf_get_param_definition(iamf, param->parameter_id); |
|
if (!param_definition) { |
|
ret = add_param_definition(iamf, param, NULL, log_ctx); |
|
if (ret < 0) |
|
goto fail; |
|
} |
|
|
|
for (int j = 0; j < submix->nb_elements; j++) { |
|
const AVIAMFSubmixElement *element = submix->elements[j]; |
|
param = element->element_mix_config; |
|
|
|
if (!param) { |
|
av_log(log_ctx, AV_LOG_ERROR, "element_mix_config is not present for element %u in submix %u from " |
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"Mix Presentation ID %"PRId64"\n", j, i, stg->id); |
|
ret = AVERROR(EINVAL); |
|
goto fail; |
|
} |
|
param_definition = ff_iamf_get_param_definition(iamf, param->parameter_id); |
|
if (!param_definition) { |
|
ret = add_param_definition(iamf, param, NULL, log_ctx); |
|
if (ret < 0) |
|
goto fail; |
|
} |
|
} |
|
} |
|
|
|
tmp = av_realloc_array(iamf->mix_presentations, iamf->nb_mix_presentations + 1, sizeof(*iamf->mix_presentations)); |
|
if (!tmp) { |
|
ret = AVERROR(ENOMEM); |
|
goto fail; |
|
} |
|
|
|
iamf->mix_presentations = tmp; |
|
iamf->mix_presentations[iamf->nb_mix_presentations++] = mix_presentation; |
|
|
|
return 0; |
|
fail: |
|
ff_iamf_free_mix_presentation(&mix_presentation); |
|
return ret; |
|
} |
|
|
|
static int iamf_write_codec_config(const IAMFContext *iamf, |
|
const IAMFCodecConfig *codec_config, |
|
AVIOContext *pb) |
|
{ |
|
uint8_t header[MAX_IAMF_OBU_HEADER_SIZE]; |
|
AVIOContext *dyn_bc; |
|
uint8_t *dyn_buf = NULL; |
|
PutBitContext pbc; |
|
int dyn_size; |
|
|
|
int ret = avio_open_dyn_buf(&dyn_bc); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ffio_write_leb(dyn_bc, codec_config->codec_config_id); |
|
avio_wl32(dyn_bc, codec_config->codec_tag); |
|
|
|
ffio_write_leb(dyn_bc, codec_config->nb_samples); |
|
avio_wb16(dyn_bc, codec_config->seek_preroll); |
|
|
|
switch(codec_config->codec_id) { |
|
case AV_CODEC_ID_OPUS: |
|
avio_write(dyn_bc, codec_config->extradata, codec_config->extradata_size); |
|
break; |
|
case AV_CODEC_ID_AAC: |
|
return AVERROR_PATCHWELCOME; |
|
case AV_CODEC_ID_FLAC: |
|
avio_w8(dyn_bc, 0x80); |
|
avio_wb24(dyn_bc, codec_config->extradata_size); |
|
avio_write(dyn_bc, codec_config->extradata, codec_config->extradata_size); |
|
break; |
|
case AV_CODEC_ID_PCM_S16LE: |
|
avio_w8(dyn_bc, 0); |
|
avio_w8(dyn_bc, 16); |
|
avio_wb32(dyn_bc, codec_config->sample_rate); |
|
break; |
|
case AV_CODEC_ID_PCM_S24LE: |
|
avio_w8(dyn_bc, 0); |
|
avio_w8(dyn_bc, 24); |
|
avio_wb32(dyn_bc, codec_config->sample_rate); |
|
break; |
|
case AV_CODEC_ID_PCM_S32LE: |
|
avio_w8(dyn_bc, 0); |
|
avio_w8(dyn_bc, 32); |
|
avio_wb32(dyn_bc, codec_config->sample_rate); |
|
break; |
|
case AV_CODEC_ID_PCM_S16BE: |
|
avio_w8(dyn_bc, 1); |
|
avio_w8(dyn_bc, 16); |
|
avio_wb32(dyn_bc, codec_config->sample_rate); |
|
break; |
|
case AV_CODEC_ID_PCM_S24BE: |
|
avio_w8(dyn_bc, 1); |
|
avio_w8(dyn_bc, 24); |
|
avio_wb32(dyn_bc, codec_config->sample_rate); |
|
break; |
|
case AV_CODEC_ID_PCM_S32BE: |
|
avio_w8(dyn_bc, 1); |
|
avio_w8(dyn_bc, 32); |
|
avio_wb32(dyn_bc, codec_config->sample_rate); |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
init_put_bits(&pbc, header, sizeof(header)); |
|
put_bits(&pbc, 5, IAMF_OBU_IA_CODEC_CONFIG); |
|
put_bits(&pbc, 3, 0); |
|
flush_put_bits(&pbc); |
|
|
|
dyn_size = avio_get_dyn_buf(dyn_bc, &dyn_buf); |
|
avio_write(pb, header, put_bytes_count(&pbc, 1)); |
|
ffio_write_leb(pb, dyn_size); |
|
avio_write(pb, dyn_buf, dyn_size); |
|
ffio_free_dyn_buf(&dyn_bc); |
|
|
|
return 0; |
|
} |
|
|
|
static inline int rescale_rational(AVRational q, int b) |
|
{ |
|
return av_clip_int16(av_rescale(q.num, b, q.den)); |
|
} |
|
|
|
static int scalable_channel_layout_config(const IAMFAudioElement *audio_element, |
|
AVIOContext *dyn_bc) |
|
{ |
|
const AVIAMFAudioElement *element = audio_element->celement; |
|
uint8_t header[MAX_IAMF_OBU_HEADER_SIZE]; |
|
PutBitContext pb; |
|
|
|
init_put_bits(&pb, header, sizeof(header)); |
|
put_bits(&pb, 3, element->nb_layers); |
|
put_bits(&pb, 5, 0); |
|
flush_put_bits(&pb); |
|
avio_write(dyn_bc, header, put_bytes_count(&pb, 1)); |
|
for (int i = 0; i < element->nb_layers; i++) { |
|
AVIAMFLayer *layer = element->layers[i]; |
|
int layout; |
|
for (layout = 0; layout < FF_ARRAY_ELEMS(ff_iamf_scalable_ch_layouts); layout++) { |
|
if (!av_channel_layout_compare(&layer->ch_layout, &ff_iamf_scalable_ch_layouts[layout])) |
|
break; |
|
} |
|
init_put_bits(&pb, header, sizeof(header)); |
|
put_bits(&pb, 4, layout); |
|
put_bits(&pb, 1, !!layer->output_gain_flags); |
|
put_bits(&pb, 1, !!(layer->flags & AV_IAMF_LAYER_FLAG_RECON_GAIN)); |
|
put_bits(&pb, 2, 0); // reserved |
|
put_bits(&pb, 8, audio_element->layers[i].substream_count); |
|
put_bits(&pb, 8, audio_element->layers[i].coupled_substream_count); |
|
if (layer->output_gain_flags) { |
|
put_bits(&pb, 6, layer->output_gain_flags); |
|
put_bits(&pb, 2, 0); |
|
put_bits(&pb, 16, rescale_rational(layer->output_gain, 1 << 8)); |
|
} |
|
flush_put_bits(&pb); |
|
avio_write(dyn_bc, header, put_bytes_count(&pb, 1)); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int ambisonics_config(const IAMFAudioElement *audio_element, |
|
AVIOContext *dyn_bc) |
|
{ |
|
const AVIAMFAudioElement *element = audio_element->celement; |
|
AVIAMFLayer *layer = element->layers[0]; |
|
|
|
ffio_write_leb(dyn_bc, 0); // ambisonics_mode |
|
ffio_write_leb(dyn_bc, layer->ch_layout.nb_channels); // output_channel_count |
|
ffio_write_leb(dyn_bc, audio_element->nb_substreams); // substream_count |
|
|
|
if (layer->ch_layout.order == AV_CHANNEL_ORDER_AMBISONIC) |
|
for (int i = 0; i < layer->ch_layout.nb_channels; i++) |
|
avio_w8(dyn_bc, i); |
|
else |
|
for (int i = 0; i < layer->ch_layout.nb_channels; i++) |
|
avio_w8(dyn_bc, layer->ch_layout.u.map[i].id); |
|
|
|
return 0; |
|
} |
|
|
|
static int param_definition(const IAMFContext *iamf, |
|
const IAMFParamDefinition *param_def, |
|
AVIOContext *dyn_bc, void *log_ctx) |
|
{ |
|
const AVIAMFParamDefinition *param = param_def->param; |
|
|
|
ffio_write_leb(dyn_bc, param->parameter_id); |
|
ffio_write_leb(dyn_bc, param->parameter_rate); |
|
avio_w8(dyn_bc, param->duration ? 0 : 1 << 7); |
|
if (param->duration) { |
|
ffio_write_leb(dyn_bc, param->duration); |
|
ffio_write_leb(dyn_bc, param->constant_subblock_duration); |
|
if (param->constant_subblock_duration == 0) { |
|
ffio_write_leb(dyn_bc, param->nb_subblocks); |
|
for (int i = 0; i < param->nb_subblocks; i++) { |
|
const void *subblock = av_iamf_param_definition_get_subblock(param, i); |
|
|
|
switch (param->type) { |
|
case AV_IAMF_PARAMETER_DEFINITION_MIX_GAIN: { |
|
const AVIAMFMixGain *mix = subblock; |
|
ffio_write_leb(dyn_bc, mix->subblock_duration); |
|
break; |
|
} |
|
case AV_IAMF_PARAMETER_DEFINITION_DEMIXING: { |
|
const AVIAMFDemixingInfo *demix = subblock; |
|
ffio_write_leb(dyn_bc, demix->subblock_duration); |
|
break; |
|
} |
|
case AV_IAMF_PARAMETER_DEFINITION_RECON_GAIN: { |
|
const AVIAMFReconGain *recon = subblock; |
|
ffio_write_leb(dyn_bc, recon->subblock_duration); |
|
break; |
|
} |
|
} |
|
} |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int iamf_write_audio_element(const IAMFContext *iamf, |
|
const IAMFAudioElement *audio_element, |
|
AVIOContext *pb, void *log_ctx) |
|
{ |
|
const AVIAMFAudioElement *element = audio_element->celement; |
|
const IAMFCodecConfig *codec_config = iamf->codec_configs[audio_element->codec_config_id]; |
|
uint8_t header[MAX_IAMF_OBU_HEADER_SIZE]; |
|
AVIOContext *dyn_bc; |
|
uint8_t *dyn_buf = NULL; |
|
PutBitContext pbc; |
|
int param_definition_types = AV_IAMF_PARAMETER_DEFINITION_DEMIXING, dyn_size; |
|
|
|
int ret = avio_open_dyn_buf(&dyn_bc); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ffio_write_leb(dyn_bc, audio_element->audio_element_id); |
|
|
|
init_put_bits(&pbc, header, sizeof(header)); |
|
put_bits(&pbc, 3, element->audio_element_type); |
|
put_bits(&pbc, 5, 0); |
|
flush_put_bits(&pbc); |
|
avio_write(dyn_bc, header, put_bytes_count(&pbc, 1)); |
|
|
|
ffio_write_leb(dyn_bc, audio_element->codec_config_id); |
|
ffio_write_leb(dyn_bc, audio_element->nb_substreams); |
|
|
|
for (int i = 0; i < audio_element->nb_substreams; i++) |
|
ffio_write_leb(dyn_bc, audio_element->substreams[i].audio_substream_id); |
|
|
|
if (element->nb_layers == 1) |
|
param_definition_types &= ~AV_IAMF_PARAMETER_DEFINITION_DEMIXING; |
|
if (element->nb_layers > 1) |
|
param_definition_types |= AV_IAMF_PARAMETER_DEFINITION_RECON_GAIN; |
|
if (codec_config->codec_tag == MKTAG('f','L','a','C') || |
|
codec_config->codec_tag == MKTAG('i','p','c','m')) |
|
param_definition_types &= ~AV_IAMF_PARAMETER_DEFINITION_RECON_GAIN; |
|
|
|
ffio_write_leb(dyn_bc, av_popcount(param_definition_types)); // num_parameters |
|
|
|
if (param_definition_types & 1) { |
|
const AVIAMFParamDefinition *param = element->demixing_info; |
|
const IAMFParamDefinition *param_def; |
|
const AVIAMFDemixingInfo *demix; |
|
|
|
if (!param) { |
|
av_log(log_ctx, AV_LOG_ERROR, "demixing_info needed but not set in Stream Group #%u\n", |
|
audio_element->audio_element_id); |
|
return AVERROR(EINVAL); |
|
} |
|
|
|
demix = av_iamf_param_definition_get_subblock(param, 0); |
|
ffio_write_leb(dyn_bc, AV_IAMF_PARAMETER_DEFINITION_DEMIXING); // type |
|
|
|
param_def = ff_iamf_get_param_definition(iamf, param->parameter_id); |
|
ret = param_definition(iamf, param_def, dyn_bc, log_ctx); |
|
if (ret < 0) |
|
return ret; |
|
|
|
avio_w8(dyn_bc, demix->dmixp_mode << 5); // dmixp_mode |
|
avio_w8(dyn_bc, element->default_w << 4); // default_w |
|
} |
|
if (param_definition_types & 2) { |
|
const AVIAMFParamDefinition *param = element->recon_gain_info; |
|
const IAMFParamDefinition *param_def; |
|
|
|
if (!param) { |
|
av_log(log_ctx, AV_LOG_ERROR, "recon_gain_info needed but not set in Stream Group #%u\n", |
|
audio_element->audio_element_id); |
|
return AVERROR(EINVAL); |
|
} |
|
ffio_write_leb(dyn_bc, AV_IAMF_PARAMETER_DEFINITION_RECON_GAIN); // type |
|
|
|
param_def = ff_iamf_get_param_definition(iamf, param->parameter_id); |
|
ret = param_definition(iamf, param_def, dyn_bc, log_ctx); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
|
|
if (element->audio_element_type == AV_IAMF_AUDIO_ELEMENT_TYPE_CHANNEL) { |
|
ret = scalable_channel_layout_config(audio_element, dyn_bc); |
|
if (ret < 0) |
|
return ret; |
|
} else { |
|
ret = ambisonics_config(audio_element, dyn_bc); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
|
|
init_put_bits(&pbc, header, sizeof(header)); |
|
put_bits(&pbc, 5, IAMF_OBU_IA_AUDIO_ELEMENT); |
|
put_bits(&pbc, 3, 0); |
|
flush_put_bits(&pbc); |
|
|
|
dyn_size = avio_get_dyn_buf(dyn_bc, &dyn_buf); |
|
avio_write(pb, header, put_bytes_count(&pbc, 1)); |
|
ffio_write_leb(pb, dyn_size); |
|
avio_write(pb, dyn_buf, dyn_size); |
|
ffio_free_dyn_buf(&dyn_bc); |
|
|
|
return 0; |
|
} |
|
|
|
static int iamf_write_mixing_presentation(const IAMFContext *iamf, |
|
const IAMFMixPresentation *mix_presentation, |
|
AVIOContext *pb, void *log_ctx) |
|
{ |
|
uint8_t header[MAX_IAMF_OBU_HEADER_SIZE]; |
|
const AVIAMFMixPresentation *mix = mix_presentation->cmix; |
|
const AVDictionaryEntry *tag = NULL; |
|
PutBitContext pbc; |
|
AVIOContext *dyn_bc; |
|
uint8_t *dyn_buf = NULL; |
|
int dyn_size; |
|
|
|
int ret = avio_open_dyn_buf(&dyn_bc); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ffio_write_leb(dyn_bc, mix_presentation->mix_presentation_id); // mix_presentation_id |
|
ffio_write_leb(dyn_bc, av_dict_count(mix->annotations)); // count_label |
|
|
|
while ((tag = av_dict_iterate(mix->annotations, tag))) |
|
avio_put_str(dyn_bc, tag->key); |
|
while ((tag = av_dict_iterate(mix->annotations, tag))) |
|
avio_put_str(dyn_bc, tag->value); |
|
|
|
ffio_write_leb(dyn_bc, mix->nb_submixes); |
|
for (int i = 0; i < mix->nb_submixes; i++) { |
|
const AVIAMFSubmix *sub_mix = mix->submixes[i]; |
|
const IAMFParamDefinition *param_def; |
|
|
|
ffio_write_leb(dyn_bc, sub_mix->nb_elements); |
|
for (int j = 0; j < sub_mix->nb_elements; j++) { |
|
const IAMFAudioElement *audio_element = NULL; |
|
const AVIAMFSubmixElement *submix_element = sub_mix->elements[j]; |
|
|
|
for (int k = 0; k < iamf->nb_audio_elements; k++) |
|
if (iamf->audio_elements[k]->audio_element_id == submix_element->audio_element_id) { |
|
audio_element = iamf->audio_elements[k]; |
|
break; |
|
} |
|
|
|
av_assert0(audio_element); |
|
ffio_write_leb(dyn_bc, submix_element->audio_element_id); |
|
|
|
if (av_dict_count(submix_element->annotations) != av_dict_count(mix->annotations)) { |
|
av_log(log_ctx, AV_LOG_ERROR, "Inconsistent amount of labels in submix %d from Mix Presentation id #%u\n", |
|
j, audio_element->audio_element_id); |
|
return AVERROR(EINVAL); |
|
} |
|
while ((tag = av_dict_iterate(submix_element->annotations, tag))) |
|
avio_put_str(dyn_bc, tag->value); |
|
|
|
init_put_bits(&pbc, header, sizeof(header)); |
|
put_bits(&pbc, 2, submix_element->headphones_rendering_mode); |
|
put_bits(&pbc, 6, 0); // reserved |
|
flush_put_bits(&pbc); |
|
avio_write(dyn_bc, header, put_bytes_count(&pbc, 1)); |
|
ffio_write_leb(dyn_bc, 0); // rendering_config_extension_size |
|
|
|
param_def = ff_iamf_get_param_definition(iamf, submix_element->element_mix_config->parameter_id); |
|
ret = param_definition(iamf, param_def, dyn_bc, log_ctx); |
|
if (ret < 0) |
|
return ret; |
|
|
|
avio_wb16(dyn_bc, rescale_rational(submix_element->default_mix_gain, 1 << 8)); |
|
} |
|
|
|
param_def = ff_iamf_get_param_definition(iamf, sub_mix->output_mix_config->parameter_id); |
|
ret = param_definition(iamf, param_def, dyn_bc, log_ctx); |
|
if (ret < 0) |
|
return ret; |
|
avio_wb16(dyn_bc, rescale_rational(sub_mix->default_mix_gain, 1 << 8)); |
|
|
|
ffio_write_leb(dyn_bc, sub_mix->nb_layouts); // nb_layouts |
|
for (int i = 0; i < sub_mix->nb_layouts; i++) { |
|
const AVIAMFSubmixLayout *submix_layout = sub_mix->layouts[i]; |
|
int layout, info_type; |
|
int dialogue = submix_layout->dialogue_anchored_loudness.num && |
|
submix_layout->dialogue_anchored_loudness.den; |
|
int album = submix_layout->album_anchored_loudness.num && |
|
submix_layout->album_anchored_loudness.den; |
|
|
|
if (submix_layout->layout_type == AV_IAMF_SUBMIX_LAYOUT_TYPE_LOUDSPEAKERS) { |
|
for (layout = 0; layout < FF_ARRAY_ELEMS(ff_iamf_sound_system_map); layout++) { |
|
if (!av_channel_layout_compare(&submix_layout->sound_system, &ff_iamf_sound_system_map[layout].layout)) |
|
break; |
|
} |
|
if (layout == FF_ARRAY_ELEMS(ff_iamf_sound_system_map)) { |
|
av_log(log_ctx, AV_LOG_ERROR, "Invalid Sound System value in a submix\n"); |
|
return AVERROR(EINVAL); |
|
} |
|
} |
|
init_put_bits(&pbc, header, sizeof(header)); |
|
put_bits(&pbc, 2, submix_layout->layout_type); // layout_type |
|
if (submix_layout->layout_type == AV_IAMF_SUBMIX_LAYOUT_TYPE_LOUDSPEAKERS) { |
|
put_bits(&pbc, 4, ff_iamf_sound_system_map[layout].id); // sound_system |
|
put_bits(&pbc, 2, 0); // reserved |
|
} else |
|
put_bits(&pbc, 6, 0); // reserved |
|
flush_put_bits(&pbc); |
|
avio_write(dyn_bc, header, put_bytes_count(&pbc, 1)); |
|
|
|
info_type = (submix_layout->true_peak.num && submix_layout->true_peak.den); |
|
info_type |= (dialogue || album) << 1; |
|
avio_w8(dyn_bc, info_type); |
|
avio_wb16(dyn_bc, rescale_rational(submix_layout->integrated_loudness, 1 << 8)); |
|
avio_wb16(dyn_bc, rescale_rational(submix_layout->digital_peak, 1 << 8)); |
|
if (info_type & 1) |
|
avio_wb16(dyn_bc, rescale_rational(submix_layout->true_peak, 1 << 8)); |
|
if (info_type & 2) { |
|
avio_w8(dyn_bc, dialogue + album); // num_anchored_loudness |
|
if (dialogue) { |
|
avio_w8(dyn_bc, IAMF_ANCHOR_ELEMENT_DIALOGUE); |
|
avio_wb16(dyn_bc, rescale_rational(submix_layout->dialogue_anchored_loudness, 1 << 8)); |
|
} |
|
if (album) { |
|
avio_w8(dyn_bc, IAMF_ANCHOR_ELEMENT_ALBUM); |
|
avio_wb16(dyn_bc, rescale_rational(submix_layout->album_anchored_loudness, 1 << 8)); |
|
} |
|
} |
|
} |
|
} |
|
|
|
init_put_bits(&pbc, header, sizeof(header)); |
|
put_bits(&pbc, 5, IAMF_OBU_IA_MIX_PRESENTATION); |
|
put_bits(&pbc, 3, 0); |
|
flush_put_bits(&pbc); |
|
|
|
dyn_size = avio_get_dyn_buf(dyn_bc, &dyn_buf); |
|
avio_write(pb, header, put_bytes_count(&pbc, 1)); |
|
ffio_write_leb(pb, dyn_size); |
|
avio_write(pb, dyn_buf, dyn_size); |
|
ffio_free_dyn_buf(&dyn_bc); |
|
|
|
return 0; |
|
} |
|
|
|
int ff_iamf_write_descriptors(const IAMFContext *iamf, AVIOContext *pb, void *log_ctx) |
|
{ |
|
int ret; |
|
|
|
// Sequence Header |
|
avio_w8(pb, IAMF_OBU_IA_SEQUENCE_HEADER << 3); |
|
|
|
ffio_write_leb(pb, 6); |
|
avio_wb32(pb, MKBETAG('i','a','m','f')); |
|
avio_w8(pb, iamf->nb_audio_elements > 1); // primary_profile |
|
avio_w8(pb, iamf->nb_audio_elements > 1); // additional_profile |
|
|
|
for (int i = 0; i < iamf->nb_codec_configs; i++) { |
|
ret = iamf_write_codec_config(iamf, iamf->codec_configs[i], pb); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
|
|
for (int i = 0; i < iamf->nb_audio_elements; i++) { |
|
ret = iamf_write_audio_element(iamf, iamf->audio_elements[i], pb, log_ctx); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
|
|
for (int i = 0; i < iamf->nb_mix_presentations; i++) { |
|
ret = iamf_write_mixing_presentation(iamf, iamf->mix_presentations[i], pb, log_ctx); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int write_parameter_block(const IAMFContext *iamf, AVIOContext *pb, |
|
const AVIAMFParamDefinition *param, void *log_ctx) |
|
{ |
|
uint8_t header[MAX_IAMF_OBU_HEADER_SIZE]; |
|
IAMFParamDefinition *param_definition = ff_iamf_get_param_definition(iamf, param->parameter_id); |
|
PutBitContext pbc; |
|
AVIOContext *dyn_bc; |
|
uint8_t *dyn_buf = NULL; |
|
int dyn_size, ret; |
|
|
|
if (param->type > AV_IAMF_PARAMETER_DEFINITION_RECON_GAIN) { |
|
av_log(log_ctx, AV_LOG_DEBUG, "Ignoring side data with unknown type %u\n", |
|
param->type); |
|
return 0; |
|
} |
|
|
|
if (!param_definition) { |
|
av_log(log_ctx, AV_LOG_ERROR, "Non-existent Parameter Definition with ID %u referenced by a packet\n", |
|
param->parameter_id); |
|
return AVERROR(EINVAL); |
|
} |
|
|
|
if (param->type != param_definition->param->type) { |
|
av_log(log_ctx, AV_LOG_ERROR, "Inconsistent values for Parameter Definition " |
|
"with ID %u in a packet\n", |
|
param->parameter_id); |
|
return AVERROR(EINVAL); |
|
} |
|
|
|
ret = avio_open_dyn_buf(&dyn_bc); |
|
if (ret < 0) |
|
return ret; |
|
|
|
// Sequence Header |
|
init_put_bits(&pbc, header, sizeof(header)); |
|
put_bits(&pbc, 5, IAMF_OBU_IA_PARAMETER_BLOCK); |
|
put_bits(&pbc, 3, 0); |
|
flush_put_bits(&pbc); |
|
avio_write(pb, header, put_bytes_count(&pbc, 1)); |
|
|
|
ffio_write_leb(dyn_bc, param->parameter_id); |
|
if (!param_definition->mode) { |
|
ffio_write_leb(dyn_bc, param->duration); |
|
ffio_write_leb(dyn_bc, param->constant_subblock_duration); |
|
if (param->constant_subblock_duration == 0) |
|
ffio_write_leb(dyn_bc, param->nb_subblocks); |
|
} |
|
|
|
for (int i = 0; i < param->nb_subblocks; i++) { |
|
const void *subblock = av_iamf_param_definition_get_subblock(param, i); |
|
|
|
switch (param->type) { |
|
case AV_IAMF_PARAMETER_DEFINITION_MIX_GAIN: { |
|
const AVIAMFMixGain *mix = subblock; |
|
if (!param_definition->mode && param->constant_subblock_duration == 0) |
|
ffio_write_leb(dyn_bc, mix->subblock_duration); |
|
|
|
ffio_write_leb(dyn_bc, mix->animation_type); |
|
|
|
avio_wb16(dyn_bc, rescale_rational(mix->start_point_value, 1 << 8)); |
|
if (mix->animation_type >= AV_IAMF_ANIMATION_TYPE_LINEAR) |
|
avio_wb16(dyn_bc, rescale_rational(mix->end_point_value, 1 << 8)); |
|
if (mix->animation_type == AV_IAMF_ANIMATION_TYPE_BEZIER) { |
|
avio_wb16(dyn_bc, rescale_rational(mix->control_point_value, 1 << 8)); |
|
avio_w8(dyn_bc, av_clip_uint8(av_rescale(mix->control_point_relative_time.num, 1 << 8, |
|
mix->control_point_relative_time.den))); |
|
} |
|
break; |
|
} |
|
case AV_IAMF_PARAMETER_DEFINITION_DEMIXING: { |
|
const AVIAMFDemixingInfo *demix = subblock; |
|
if (!param_definition->mode && param->constant_subblock_duration == 0) |
|
ffio_write_leb(dyn_bc, demix->subblock_duration); |
|
|
|
avio_w8(dyn_bc, demix->dmixp_mode << 5); |
|
break; |
|
} |
|
case AV_IAMF_PARAMETER_DEFINITION_RECON_GAIN: { |
|
const AVIAMFReconGain *recon = subblock; |
|
const AVIAMFAudioElement *audio_element = param_definition->audio_element->celement; |
|
|
|
if (!param_definition->mode && param->constant_subblock_duration == 0) |
|
ffio_write_leb(dyn_bc, recon->subblock_duration); |
|
|
|
if (!audio_element) { |
|
av_log(log_ctx, AV_LOG_ERROR, "Invalid Parameter Definition with ID %u referenced by a packet\n", param->parameter_id); |
|
return AVERROR(EINVAL); |
|
} |
|
|
|
for (int j = 0; j < audio_element->nb_layers; j++) { |
|
const AVIAMFLayer *layer = audio_element->layers[j]; |
|
|
|
if (layer->flags & AV_IAMF_LAYER_FLAG_RECON_GAIN) { |
|
unsigned int recon_gain_flags = 0; |
|
int k = 0; |
|
|
|
for (; k < 7; k++) |
|
recon_gain_flags |= (1 << k) * !!recon->recon_gain[j][k]; |
|
for (; k < 12; k++) |
|
recon_gain_flags |= (2 << k) * !!recon->recon_gain[j][k]; |
|
if (recon_gain_flags >> 8) |
|
recon_gain_flags |= (1 << k); |
|
|
|
ffio_write_leb(dyn_bc, recon_gain_flags); |
|
for (k = 0; k < 12; k++) { |
|
if (recon->recon_gain[j][k]) |
|
avio_w8(dyn_bc, recon->recon_gain[j][k]); |
|
} |
|
} |
|
} |
|
break; |
|
} |
|
default: |
|
av_assert0(0); |
|
} |
|
} |
|
|
|
dyn_size = avio_get_dyn_buf(dyn_bc, &dyn_buf); |
|
ffio_write_leb(pb, dyn_size); |
|
avio_write(pb, dyn_buf, dyn_size); |
|
ffio_free_dyn_buf(&dyn_bc); |
|
|
|
return 0; |
|
} |
|
|
|
int ff_iamf_write_parameter_blocks(const IAMFContext *iamf, AVIOContext *pb, |
|
const AVPacket *pkt, void *log_ctx) |
|
{ |
|
AVIAMFParamDefinition *mix = |
|
(AVIAMFParamDefinition *)av_packet_get_side_data(pkt, |
|
AV_PKT_DATA_IAMF_MIX_GAIN_PARAM, |
|
NULL); |
|
AVIAMFParamDefinition *demix = |
|
(AVIAMFParamDefinition *)av_packet_get_side_data(pkt, |
|
AV_PKT_DATA_IAMF_DEMIXING_INFO_PARAM, |
|
NULL); |
|
AVIAMFParamDefinition *recon = |
|
(AVIAMFParamDefinition *)av_packet_get_side_data(pkt, |
|
AV_PKT_DATA_IAMF_RECON_GAIN_INFO_PARAM, |
|
NULL); |
|
|
|
if (mix) { |
|
int ret = write_parameter_block(iamf, pb, mix, log_ctx); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
if (demix) { |
|
int ret = write_parameter_block(iamf, pb, demix, log_ctx); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
if (recon) { |
|
int ret = write_parameter_block(iamf, pb, recon, log_ctx); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static IAMFAudioElement *get_audio_element(const IAMFContext *c, |
|
unsigned int audio_substream_id) |
|
{ |
|
for (int i = 0; i < c->nb_audio_elements; i++) { |
|
IAMFAudioElement *audio_element = c->audio_elements[i]; |
|
for (int j = 0; j < audio_element->nb_substreams; j++) { |
|
IAMFSubStream *substream = &audio_element->substreams[j]; |
|
if (substream->audio_substream_id == audio_substream_id) |
|
return audio_element; |
|
} |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
int ff_iamf_write_audio_frame(const IAMFContext *iamf, AVIOContext *pb, |
|
unsigned audio_substream_id, const AVPacket *pkt) |
|
{ |
|
uint8_t header[MAX_IAMF_OBU_HEADER_SIZE]; |
|
PutBitContext pbc; |
|
AVIOContext *dyn_bc; |
|
uint8_t *side_data, *dyn_buf = NULL; |
|
unsigned int skip_samples = 0, discard_padding = 0; |
|
size_t side_data_size; |
|
int dyn_size, type = audio_substream_id <= 17 ? |
|
audio_substream_id + IAMF_OBU_IA_AUDIO_FRAME_ID0 : IAMF_OBU_IA_AUDIO_FRAME; |
|
int ret; |
|
|
|
if (!pkt->size) { |
|
IAMFAudioElement *audio_element; |
|
IAMFCodecConfig *codec_config; |
|
size_t new_extradata_size; |
|
uint8_t *new_extradata = av_packet_get_side_data(pkt, |
|
AV_PKT_DATA_NEW_EXTRADATA, |
|
&new_extradata_size); |
|
|
|
if (!new_extradata) |
|
return AVERROR_INVALIDDATA; |
|
audio_element = get_audio_element(iamf, audio_substream_id); |
|
if (!audio_element) |
|
return AVERROR(EINVAL); |
|
codec_config = ff_iamf_get_codec_config(iamf, audio_element->codec_config_id); |
|
if (!codec_config) |
|
return AVERROR(EINVAL); |
|
|
|
av_free(codec_config->extradata); |
|
codec_config->extradata = av_memdup(new_extradata, new_extradata_size); |
|
if (!codec_config->extradata) |
|
return AVERROR(ENOMEM); |
|
codec_config->extradata_size = new_extradata_size; |
|
|
|
return update_extradata(codec_config); |
|
} |
|
|
|
side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, |
|
&side_data_size); |
|
|
|
if (side_data && side_data_size >= 10) { |
|
skip_samples = AV_RL32(side_data); |
|
discard_padding = AV_RL32(side_data + 4); |
|
} |
|
|
|
ret = avio_open_dyn_buf(&dyn_bc); |
|
if (ret < 0) |
|
return ret; |
|
|
|
init_put_bits(&pbc, header, sizeof(header)); |
|
put_bits(&pbc, 5, type); |
|
put_bits(&pbc, 1, 0); // obu_redundant_copy |
|
put_bits(&pbc, 1, skip_samples || discard_padding); |
|
put_bits(&pbc, 1, 0); // obu_extension_flag |
|
flush_put_bits(&pbc); |
|
avio_write(pb, header, put_bytes_count(&pbc, 1)); |
|
|
|
if (skip_samples || discard_padding) { |
|
ffio_write_leb(dyn_bc, discard_padding); |
|
ffio_write_leb(dyn_bc, skip_samples); |
|
} |
|
|
|
if (audio_substream_id > 17) |
|
ffio_write_leb(dyn_bc, audio_substream_id); |
|
|
|
dyn_size = avio_get_dyn_buf(dyn_bc, &dyn_buf); |
|
ffio_write_leb(pb, dyn_size + pkt->size); |
|
avio_write(pb, dyn_buf, dyn_size); |
|
ffio_free_dyn_buf(&dyn_bc); |
|
avio_write(pb, pkt->data, pkt->size); |
|
|
|
return 0; |
|
}
|
|
|