mirror of https://git.ffmpeg.org/ffmpeg.git
126 lines
4.5 KiB
C
126 lines
4.5 KiB
C
/*
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* Immersive Audio Model and Formats common 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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#include "libavutil/channel_layout.h"
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#include "libavutil/iamf.h"
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#include "libavutil/mem.h"
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#include "iamf.h"
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const AVChannelLayout ff_iamf_scalable_ch_layouts[10] = {
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AV_CHANNEL_LAYOUT_MONO,
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AV_CHANNEL_LAYOUT_STEREO,
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// "Loudspeaker configuration for Sound System B"
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AV_CHANNEL_LAYOUT_5POINT1_BACK,
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// "Loudspeaker configuration for Sound System C"
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AV_CHANNEL_LAYOUT_5POINT1POINT2_BACK,
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// "Loudspeaker configuration for Sound System D"
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AV_CHANNEL_LAYOUT_5POINT1POINT4_BACK,
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// "Loudspeaker configuration for Sound System I"
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AV_CHANNEL_LAYOUT_7POINT1,
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// "Loudspeaker configuration for Sound System I" + Ltf + Rtf
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AV_CHANNEL_LAYOUT_7POINT1POINT2,
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// "Loudspeaker configuration for Sound System J"
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AV_CHANNEL_LAYOUT_7POINT1POINT4_BACK,
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// Front subset of "Loudspeaker configuration for Sound System J"
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AV_CHANNEL_LAYOUT_3POINT1POINT2,
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// Binaural
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AV_CHANNEL_LAYOUT_STEREO,
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};
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const struct IAMFSoundSystemMap ff_iamf_sound_system_map[13] = {
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{ SOUND_SYSTEM_A_0_2_0, AV_CHANNEL_LAYOUT_STEREO },
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{ SOUND_SYSTEM_B_0_5_0, AV_CHANNEL_LAYOUT_5POINT1_BACK },
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{ SOUND_SYSTEM_C_2_5_0, AV_CHANNEL_LAYOUT_5POINT1POINT2_BACK },
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{ SOUND_SYSTEM_D_4_5_0, AV_CHANNEL_LAYOUT_5POINT1POINT4_BACK },
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{ SOUND_SYSTEM_E_4_5_1,
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{
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.nb_channels = 11,
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.order = AV_CHANNEL_ORDER_NATIVE,
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.u.mask = AV_CH_LAYOUT_5POINT1POINT4_BACK | AV_CH_BOTTOM_FRONT_CENTER,
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},
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},
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{ SOUND_SYSTEM_F_3_7_0, AV_CHANNEL_LAYOUT_7POINT2POINT3 },
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{ SOUND_SYSTEM_G_4_9_0, AV_CHANNEL_LAYOUT_9POINT1POINT4_BACK },
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{ SOUND_SYSTEM_H_9_10_3, AV_CHANNEL_LAYOUT_22POINT2 },
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{ SOUND_SYSTEM_I_0_7_0, AV_CHANNEL_LAYOUT_7POINT1 },
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{ SOUND_SYSTEM_J_4_7_0, AV_CHANNEL_LAYOUT_7POINT1POINT4_BACK },
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{ SOUND_SYSTEM_10_2_7_0, AV_CHANNEL_LAYOUT_7POINT1POINT2 },
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{ SOUND_SYSTEM_11_2_3_0, AV_CHANNEL_LAYOUT_3POINT1POINT2 },
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{ SOUND_SYSTEM_12_0_1_0, AV_CHANNEL_LAYOUT_MONO },
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};
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void ff_iamf_free_audio_element(IAMFAudioElement **paudio_element)
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{
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IAMFAudioElement *audio_element = *paudio_element;
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if (!audio_element)
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return;
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for (int i = 0; i < audio_element->nb_substreams; i++)
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avcodec_parameters_free(&audio_element->substreams[i].codecpar);
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av_free(audio_element->substreams);
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av_free(audio_element->layers);
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av_iamf_audio_element_free(&audio_element->element);
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av_freep(paudio_element);
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}
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void ff_iamf_free_mix_presentation(IAMFMixPresentation **pmix_presentation)
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{
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IAMFMixPresentation *mix_presentation = *pmix_presentation;
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if (!mix_presentation)
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return;
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for (int i = 0; i < mix_presentation->count_label; i++)
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av_free(mix_presentation->language_label[i]);
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av_free(mix_presentation->language_label);
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av_iamf_mix_presentation_free(&mix_presentation->mix);
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av_freep(pmix_presentation);
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}
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void ff_iamf_uninit_context(IAMFContext *c)
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{
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if (!c)
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return;
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for (int i = 0; i < c->nb_codec_configs; i++) {
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av_free(c->codec_configs[i]->extradata);
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av_free(c->codec_configs[i]);
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}
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av_freep(&c->codec_configs);
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c->nb_codec_configs = 0;
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for (int i = 0; i < c->nb_audio_elements; i++)
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ff_iamf_free_audio_element(&c->audio_elements[i]);
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av_freep(&c->audio_elements);
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c->nb_audio_elements = 0;
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for (int i = 0; i < c->nb_mix_presentations; i++)
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ff_iamf_free_mix_presentation(&c->mix_presentations[i]);
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av_freep(&c->mix_presentations);
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c->nb_mix_presentations = 0;
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for (int i = 0; i < c->nb_param_definitions; i++)
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av_free(c->param_definitions[i]);
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av_freep(&c->param_definitions);
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c->nb_param_definitions = 0;
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}
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