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/*
* Immersive Audio Model and Formats common helpers and structs
* Copyright (c) 2023 James Almer <jamrial@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/channel_layout.h"
#include "libavutil/iamf.h"
#include "libavutil/mem.h"
#include "iamf.h"
const AVChannelLayout ff_iamf_scalable_ch_layouts[10] = {
AV_CHANNEL_LAYOUT_MONO,
AV_CHANNEL_LAYOUT_STEREO,
// "Loudspeaker configuration for Sound System B"
AV_CHANNEL_LAYOUT_5POINT1_BACK,
// "Loudspeaker configuration for Sound System C"
AV_CHANNEL_LAYOUT_5POINT1POINT2_BACK,
// "Loudspeaker configuration for Sound System D"
AV_CHANNEL_LAYOUT_5POINT1POINT4_BACK,
// "Loudspeaker configuration for Sound System I"
AV_CHANNEL_LAYOUT_7POINT1,
// "Loudspeaker configuration for Sound System I" + Ltf + Rtf
AV_CHANNEL_LAYOUT_7POINT1POINT2,
// "Loudspeaker configuration for Sound System J"
AV_CHANNEL_LAYOUT_7POINT1POINT4_BACK,
// Front subset of "Loudspeaker configuration for Sound System J"
AV_CHANNEL_LAYOUT_3POINT1POINT2,
// Binaural
AV_CHANNEL_LAYOUT_BINAURAL,
};
const struct IAMFSoundSystemMap ff_iamf_sound_system_map[13] = {
{ SOUND_SYSTEM_A_0_2_0, AV_CHANNEL_LAYOUT_STEREO },
{ SOUND_SYSTEM_B_0_5_0, AV_CHANNEL_LAYOUT_5POINT1_BACK },
{ SOUND_SYSTEM_C_2_5_0, AV_CHANNEL_LAYOUT_5POINT1POINT2_BACK },
{ SOUND_SYSTEM_D_4_5_0, AV_CHANNEL_LAYOUT_5POINT1POINT4_BACK },
{ SOUND_SYSTEM_E_4_5_1,
{
.nb_channels = 11,
.order = AV_CHANNEL_ORDER_NATIVE,
.u.mask = AV_CH_LAYOUT_5POINT1POINT4_BACK | AV_CH_BOTTOM_FRONT_CENTER,
},
},
{ SOUND_SYSTEM_F_3_7_0, AV_CHANNEL_LAYOUT_7POINT2POINT3 },
{ SOUND_SYSTEM_G_4_9_0, AV_CHANNEL_LAYOUT_9POINT1POINT4_BACK },
{ SOUND_SYSTEM_H_9_10_3, AV_CHANNEL_LAYOUT_22POINT2 },
{ SOUND_SYSTEM_I_0_7_0, AV_CHANNEL_LAYOUT_7POINT1 },
{ SOUND_SYSTEM_J_4_7_0, AV_CHANNEL_LAYOUT_7POINT1POINT4_BACK },
{ SOUND_SYSTEM_10_2_7_0, AV_CHANNEL_LAYOUT_7POINT1POINT2 },
{ SOUND_SYSTEM_11_2_3_0, AV_CHANNEL_LAYOUT_3POINT1POINT2 },
{ SOUND_SYSTEM_12_0_1_0, AV_CHANNEL_LAYOUT_MONO },
};
void ff_iamf_free_audio_element(IAMFAudioElement **paudio_element)
{
IAMFAudioElement *audio_element = *paudio_element;
if (!audio_element)
return;
for (int i = 0; i < audio_element->nb_substreams; i++)
avcodec_parameters_free(&audio_element->substreams[i].codecpar);
av_free(audio_element->substreams);
av_free(audio_element->layers);
av_iamf_audio_element_free(&audio_element->element);
av_freep(paudio_element);
}
void ff_iamf_free_mix_presentation(IAMFMixPresentation **pmix_presentation)
{
IAMFMixPresentation *mix_presentation = *pmix_presentation;
if (!mix_presentation)
return;
for (int i = 0; i < mix_presentation->count_label; i++)
av_free(mix_presentation->language_label[i]);
av_free(mix_presentation->language_label);
av_iamf_mix_presentation_free(&mix_presentation->mix);
av_freep(pmix_presentation);
}
void ff_iamf_uninit_context(IAMFContext *c)
{
if (!c)
return;
for (int i = 0; i < c->nb_codec_configs; i++) {
av_free(c->codec_configs[i]->extradata);
av_free(c->codec_configs[i]);
}
av_freep(&c->codec_configs);
c->nb_codec_configs = 0;
for (int i = 0; i < c->nb_audio_elements; i++)
ff_iamf_free_audio_element(&c->audio_elements[i]);
av_freep(&c->audio_elements);
c->nb_audio_elements = 0;
for (int i = 0; i < c->nb_mix_presentations; i++)
ff_iamf_free_mix_presentation(&c->mix_presentations[i]);
av_freep(&c->mix_presentations);
c->nb_mix_presentations = 0;
for (int i = 0; i < c->nb_param_definitions; i++)
av_free(c->param_definitions[i]);
av_freep(&c->param_definitions);
c->nb_param_definitions = 0;
}
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