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ffmpeg/libavutil/iamf.c
James Almer 706d4e4736 avutil/iamf: stop setting parameter definition block defaults 
It was done for the sake of having subblock_duration not be zero as the spec
forbids that value, but harcoding it to any arbitrary value is no better
considering the user is meant to fill the entire structure.

This helps speeding up the function when trying to allocate a struct with a
huge amount of blocks.

Signed-off-by: James Almer <jamrial@gmail.com>
2026-02-08 21:58:06 -03:00

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/*
* Immersive Audio Model and Formats helper functions and defines
*
* 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 <limits.h>
#include <stddef.h>
#include <stdint.h>
#include "avassert.h"
#include "error.h"
#include "iamf.h"
#include "log.h"
#include "mem.h"
#include "opt.h"
#define IAMF_ADD_FUNC_TEMPLATE(parent_type, parent_name, child_type, child_name, suffix) \
child_type *av_iamf_ ## parent_name ## _add_ ## child_name(parent_type *parent_name) \
{ \
child_type **child_name ## suffix, *child_name; \
\
if (parent_name->nb_## child_name ## suffix == UINT_MAX) \
return NULL; \
\
child_name ## suffix = av_realloc_array(parent_name->child_name ## suffix, \
parent_name->nb_## child_name ## suffix + 1, \
sizeof(*parent_name->child_name ## suffix)); \
if (!child_name ## suffix) \
return NULL; \
\
parent_name->child_name ## suffix = child_name ## suffix; \
\
child_name = parent_name->child_name ## suffix[parent_name->nb_## child_name ## suffix] \
= av_mallocz(sizeof(*child_name)); \
if (!child_name) \
return NULL; \
\
child_name->av_class = &child_name ## _class; \
av_opt_set_defaults(child_name); \
parent_name->nb_## child_name ## suffix++; \
\
return child_name; \
}
#define FLAGS AV_OPT_FLAG_ENCODING_PARAM
//
// Param Definition
//
#define OFFSET(x) offsetof(AVIAMFMixGain, x)
static const AVOption mix_gain_options[] = {
{ "subblock_duration", "set subblock_duration", OFFSET(subblock_duration), AV_OPT_TYPE_UINT, {.i64 = 1 }, 1, UINT_MAX, FLAGS },
{ "animation_type", "set animation_type", OFFSET(animation_type), AV_OPT_TYPE_UINT, {.i64 = 0 }, 0, 2, FLAGS },
{ "start_point_value", "set start_point_value", OFFSET(start_point_value), AV_OPT_TYPE_RATIONAL, {.dbl = 0 }, -128.0, 128.0, FLAGS },
{ "end_point_value", "set end_point_value", OFFSET(end_point_value), AV_OPT_TYPE_RATIONAL, {.dbl = 0 }, -128.0, 128.0, FLAGS },
{ "control_point_value", "set control_point_value", OFFSET(control_point_value), AV_OPT_TYPE_RATIONAL, {.dbl = 0 }, -128.0, 128.0, FLAGS },
{ "control_point_relative_time", "set control_point_relative_time", OFFSET(control_point_relative_time), AV_OPT_TYPE_RATIONAL, {.dbl = 0 }, 0.0, 1.0, FLAGS },
{ NULL },
};
static const AVClass mix_gain_class = {
.class_name = "AVIAMFMixGain",
.item_name = av_default_item_name,
.version = LIBAVUTIL_VERSION_INT,
.option = mix_gain_options,
};
#undef OFFSET
#define OFFSET(x) offsetof(AVIAMFDemixingInfo, x)
static const AVOption demixing_info_options[] = {
{ "subblock_duration", "set subblock_duration", OFFSET(subblock_duration), AV_OPT_TYPE_UINT, {.i64 = 1 }, 1, UINT_MAX, FLAGS },
{ "dmixp_mode", "set dmixp_mode", OFFSET(dmixp_mode), AV_OPT_TYPE_UINT, {.i64 = 0 }, 0, 6, FLAGS },
{ NULL },
};
static const AVClass demixing_info_class = {
.class_name = "AVIAMFDemixingInfo",
.item_name = av_default_item_name,
.version = LIBAVUTIL_VERSION_INT,
.option = demixing_info_options,
};
#undef OFFSET
#define OFFSET(x) offsetof(AVIAMFReconGain, x)
static const AVOption recon_gain_options[] = {
{ "subblock_duration", "set subblock_duration", OFFSET(subblock_duration), AV_OPT_TYPE_UINT, {.i64 = 1 }, 1, UINT_MAX, FLAGS },
{ NULL },
};
static const AVClass recon_gain_class = {
.class_name = "AVIAMFReconGain",
.item_name = av_default_item_name,
.version = LIBAVUTIL_VERSION_INT,
.option = recon_gain_options,
};
#undef OFFSET
#define OFFSET(x) offsetof(AVIAMFParamDefinition, x)
static const AVOption param_definition_options[] = {
{ "parameter_id", "set parameter_id", OFFSET(parameter_id), AV_OPT_TYPE_UINT, {.i64 = 0 }, 0, UINT_MAX, FLAGS },
{ "parameter_rate", "set parameter_rate", OFFSET(parameter_rate), AV_OPT_TYPE_UINT, {.i64 = 0 }, 0, UINT_MAX, FLAGS },
{ "duration", "set duration", OFFSET(duration), AV_OPT_TYPE_UINT, {.i64 = 0 }, 0, UINT_MAX, FLAGS },
{ "constant_subblock_duration", "set constant_subblock_duration", OFFSET(constant_subblock_duration), AV_OPT_TYPE_UINT, {.i64 = 0 }, 0, UINT_MAX, FLAGS },
{ NULL },
};
static const AVClass *param_definition_child_iterate(void **opaque)
{
uintptr_t i = (uintptr_t)*opaque;
const AVClass *ret = NULL;
switch(i) {
case AV_IAMF_PARAMETER_DEFINITION_MIX_GAIN:
ret = &mix_gain_class;
break;
case AV_IAMF_PARAMETER_DEFINITION_DEMIXING:
ret = &demixing_info_class;
break;
case AV_IAMF_PARAMETER_DEFINITION_RECON_GAIN:
ret = &recon_gain_class;
break;
default:
break;
}
if (ret)
*opaque = (void*)(i + 1);
return ret;
}
static const AVClass param_definition_class = {
.class_name = "AVIAMFParamDefinition",
.item_name = av_default_item_name,
.version = LIBAVUTIL_VERSION_INT,
.option = param_definition_options,
.child_class_iterate = param_definition_child_iterate,
};
const AVClass *av_iamf_param_definition_get_class(void)
{
return &param_definition_class;
}
AVIAMFParamDefinition *av_iamf_param_definition_alloc(enum AVIAMFParamDefinitionType type,
unsigned int nb_subblocks, size_t *out_size)
{
struct MixGainStruct {
AVIAMFParamDefinition p;
AVIAMFMixGain m;
};
struct DemixStruct {
AVIAMFParamDefinition p;
AVIAMFDemixingInfo d;
};
struct ReconGainStruct {
AVIAMFParamDefinition p;
AVIAMFReconGain r;
};
size_t subblocks_offset, subblock_size;
size_t size;
AVIAMFParamDefinition *par;
switch (type) {
case AV_IAMF_PARAMETER_DEFINITION_MIX_GAIN:
subblocks_offset = offsetof(struct MixGainStruct, m);
subblock_size = sizeof(AVIAMFMixGain);
break;
case AV_IAMF_PARAMETER_DEFINITION_DEMIXING:
subblocks_offset = offsetof(struct DemixStruct, d);
subblock_size = sizeof(AVIAMFDemixingInfo);
break;
case AV_IAMF_PARAMETER_DEFINITION_RECON_GAIN:
subblocks_offset = offsetof(struct ReconGainStruct, r);
subblock_size = sizeof(AVIAMFReconGain);
break;
default:
return NULL;
}
size = subblocks_offset;
if (nb_subblocks > (SIZE_MAX - size) / subblock_size)
return NULL;
size += subblock_size * nb_subblocks;
par = av_mallocz(size);
if (!par)
return NULL;
par->av_class = &param_definition_class;
av_opt_set_defaults(par);
par->type = type;
par->nb_subblocks = nb_subblocks;
par->subblock_size = subblock_size;
par->subblocks_offset = subblocks_offset;
for (int i = 0; i < nb_subblocks; i++) {
void *subblock = av_iamf_param_definition_get_subblock(par, i);
switch (type) {
case AV_IAMF_PARAMETER_DEFINITION_MIX_GAIN:
((AVIAMFMixGain *)subblock)->av_class = &mix_gain_class;
break;
case AV_IAMF_PARAMETER_DEFINITION_DEMIXING:
((AVIAMFDemixingInfo *)subblock)->av_class = &demixing_info_class;
break;
case AV_IAMF_PARAMETER_DEFINITION_RECON_GAIN:
((AVIAMFReconGain *)subblock)->av_class = &recon_gain_class;
break;
default:
av_assert0(0);
}
}
if (out_size)
*out_size = size;
return par;
}
//
// Audio Element
//
static const AVOptionArrayDef demixing_matrix_def = { .size_max = (255 + 255) * 255, .sep = '|' };
#undef OFFSET
#define OFFSET(x) offsetof(AVIAMFLayer, x)
static const AVOption layer_options[] = {
{ "ch_layout", "set ch_layout", OFFSET(ch_layout), AV_OPT_TYPE_CHLAYOUT, {.str = NULL }, 0, 0, FLAGS },
{ "flags", "set flags", OFFSET(flags), AV_OPT_TYPE_FLAGS,
{.i64 = 0 }, 0, AV_IAMF_LAYER_FLAG_RECON_GAIN, FLAGS, .unit = "flags" },
{"recon_gain", "Recon gain is present", 0, AV_OPT_TYPE_CONST,
{.i64 = AV_IAMF_LAYER_FLAG_RECON_GAIN }, INT_MIN, INT_MAX, FLAGS, .unit = "flags"},
{ "output_gain_flags", "set output_gain_flags", OFFSET(output_gain_flags), AV_OPT_TYPE_FLAGS,
{.i64 = 0 }, 0, (1 << 6) - 1, FLAGS, .unit = "output_gain_flags" },
{"FL", "Left channel", 0, AV_OPT_TYPE_CONST,
{.i64 = 1 << 5 }, INT_MIN, INT_MAX, FLAGS, .unit = "output_gain_flags"},
{"FR", "Right channel", 0, AV_OPT_TYPE_CONST,
{.i64 = 1 << 4 }, INT_MIN, INT_MAX, FLAGS, .unit = "output_gain_flags"},
{"BL", "Left surround channel", 0, AV_OPT_TYPE_CONST,
{.i64 = 1 << 3 }, INT_MIN, INT_MAX, FLAGS, .unit = "output_gain_flags"},
{"BR", "Right surround channel", 0, AV_OPT_TYPE_CONST,
{.i64 = 1 << 2 }, INT_MIN, INT_MAX, FLAGS, .unit = "output_gain_flags"},
{"TFL", "Left top front channel", 0, AV_OPT_TYPE_CONST,
{.i64 = 1 << 1 }, INT_MIN, INT_MAX, FLAGS, .unit = "output_gain_flags"},
{"TFR", "Right top front channel", 0, AV_OPT_TYPE_CONST,
{.i64 = 1 << 0 }, INT_MIN, INT_MAX, FLAGS, .unit = "output_gain_flags"},
{ "output_gain", "set output_gain", OFFSET(output_gain), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, -128.0, 128.0, FLAGS },
{ "ambisonics_mode", "set ambisonics_mode", OFFSET(ambisonics_mode), AV_OPT_TYPE_INT,
{ .i64 = AV_IAMF_AMBISONICS_MODE_MONO },
AV_IAMF_AMBISONICS_MODE_MONO, AV_IAMF_AMBISONICS_MODE_PROJECTION, FLAGS, .unit = "ambisonics_mode" },
{ "mono", NULL, 0, AV_OPT_TYPE_CONST,
{ .i64 = AV_IAMF_AMBISONICS_MODE_MONO }, .unit = "ambisonics_mode" },
{ "projection", NULL, 0, AV_OPT_TYPE_CONST,
{ .i64 = AV_IAMF_AMBISONICS_MODE_PROJECTION }, .unit = "ambisonics_mode" },
{ "demixing_matrix", "set demixing_matrix", OFFSET(demixing_matrix), AV_OPT_TYPE_RATIONAL | AV_OPT_TYPE_FLAG_ARRAY,
{ .arr = &demixing_matrix_def }, -1.0, 1.0, FLAGS },
{ NULL },
};
static const AVClass layer_class = {
.class_name = "AVIAMFLayer",
.item_name = av_default_item_name,
.version = LIBAVUTIL_VERSION_INT,
.option = layer_options,
};
#undef OFFSET
#define OFFSET(x) offsetof(AVIAMFAudioElement, x)
static const AVOption audio_element_options[] = {
{ "audio_element_type", "set audio_element_type", OFFSET(audio_element_type), AV_OPT_TYPE_INT,
{.i64 = AV_IAMF_AUDIO_ELEMENT_TYPE_CHANNEL },
AV_IAMF_AUDIO_ELEMENT_TYPE_CHANNEL, AV_IAMF_AUDIO_ELEMENT_TYPE_SCENE, FLAGS, .unit = "audio_element_type" },
{ "channel", NULL, 0, AV_OPT_TYPE_CONST,
{ .i64 = AV_IAMF_AUDIO_ELEMENT_TYPE_CHANNEL }, .unit = "audio_element_type" },
{ "scene", NULL, 0, AV_OPT_TYPE_CONST,
{ .i64 = AV_IAMF_AUDIO_ELEMENT_TYPE_SCENE }, .unit = "audio_element_type" },
{ "default_w", "set default_w", OFFSET(default_w), AV_OPT_TYPE_UINT, {.i64 = 0 }, 0, 10, FLAGS },
{ NULL },
};
static const AVClass *audio_element_child_iterate(void **opaque)
{
uintptr_t i = (uintptr_t)*opaque;
const AVClass *ret = NULL;
if (i)
ret = &layer_class;
if (ret)
*opaque = (void*)(i + 1);
return ret;
}
static const AVClass audio_element_class = {
.class_name = "AVIAMFAudioElement",
.item_name = av_default_item_name,
.version = LIBAVUTIL_VERSION_INT,
.option = audio_element_options,
.child_class_iterate = audio_element_child_iterate,
};
const AVClass *av_iamf_audio_element_get_class(void)
{
return &audio_element_class;
}
AVIAMFAudioElement *av_iamf_audio_element_alloc(void)
{
AVIAMFAudioElement *audio_element = av_mallocz(sizeof(*audio_element));
if (audio_element) {
audio_element->av_class = &audio_element_class;
av_opt_set_defaults(audio_element);
}
return audio_element;
}
IAMF_ADD_FUNC_TEMPLATE(AVIAMFAudioElement, audio_element, AVIAMFLayer, layer, s)
void av_iamf_audio_element_free(AVIAMFAudioElement **paudio_element)
{
AVIAMFAudioElement *audio_element = *paudio_element;
if (!audio_element)
return;
for (int i = 0; i < audio_element->nb_layers; i++) {
AVIAMFLayer *layer = audio_element->layers[i];
av_opt_free(layer);
av_free(layer->demixing_matrix);
av_free(layer);
}
av_free(audio_element->layers);
av_free(audio_element->demixing_info);
av_free(audio_element->recon_gain_info);
av_freep(paudio_element);
}
//
// Mix Presentation
//
#undef OFFSET
#define OFFSET(x) offsetof(AVIAMFSubmixElement, x)
static const AVOption submix_element_options[] = {
{ "headphones_rendering_mode", "Headphones rendering mode", OFFSET(headphones_rendering_mode), AV_OPT_TYPE_INT,
{ .i64 = AV_IAMF_HEADPHONES_MODE_STEREO },
AV_IAMF_HEADPHONES_MODE_STEREO, AV_IAMF_HEADPHONES_MODE_BINAURAL, FLAGS, .unit = "headphones_rendering_mode" },
{ "stereo", NULL, 0, AV_OPT_TYPE_CONST,
{ .i64 = AV_IAMF_HEADPHONES_MODE_STEREO }, .unit = "headphones_rendering_mode" },
{ "binaural", NULL, 0, AV_OPT_TYPE_CONST,
{ .i64 = AV_IAMF_HEADPHONES_MODE_BINAURAL }, .unit = "headphones_rendering_mode" },
{ "default_mix_gain", "Default mix gain", OFFSET(default_mix_gain), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, -128.0, 128.0, FLAGS },
{ "annotations", "Annotations", OFFSET(annotations), AV_OPT_TYPE_DICT, { .str = NULL }, 0, 0, FLAGS },
{ NULL },
};
static void *submix_element_child_next(void *obj, void *prev)
{
AVIAMFSubmixElement *submix_element = obj;
if (!prev)
return submix_element->element_mix_config;
return NULL;
}
static const AVClass *submix_element_child_iterate(void **opaque)
{
uintptr_t i = (uintptr_t)*opaque;
const AVClass *ret = NULL;
if (i)
ret = &param_definition_class;
if (ret)
*opaque = (void*)(i + 1);
return ret;
}
static const AVClass element_class = {
.class_name = "AVIAMFSubmixElement",
.item_name = av_default_item_name,
.version = LIBAVUTIL_VERSION_INT,
.option = submix_element_options,
.child_next = submix_element_child_next,
.child_class_iterate = submix_element_child_iterate,
};
IAMF_ADD_FUNC_TEMPLATE(AVIAMFSubmix, submix, AVIAMFSubmixElement, element, s)
#undef OFFSET
#define OFFSET(x) offsetof(AVIAMFSubmixLayout, x)
static const AVOption submix_layout_options[] = {
{ "layout_type", "Layout type", OFFSET(layout_type), AV_OPT_TYPE_INT,
{ .i64 = AV_IAMF_SUBMIX_LAYOUT_TYPE_LOUDSPEAKERS },
AV_IAMF_SUBMIX_LAYOUT_TYPE_LOUDSPEAKERS, AV_IAMF_SUBMIX_LAYOUT_TYPE_BINAURAL, FLAGS, .unit = "layout_type" },
{ "loudspeakers", NULL, 0, AV_OPT_TYPE_CONST,
{ .i64 = AV_IAMF_SUBMIX_LAYOUT_TYPE_LOUDSPEAKERS }, .unit = "layout_type" },
{ "binaural", NULL, 0, AV_OPT_TYPE_CONST,
{ .i64 = AV_IAMF_SUBMIX_LAYOUT_TYPE_BINAURAL }, .unit = "layout_type" },
{ "sound_system", "Sound System", OFFSET(sound_system), AV_OPT_TYPE_CHLAYOUT, { .str = NULL }, 0, 0, FLAGS },
{ "integrated_loudness", "Integrated loudness", OFFSET(integrated_loudness), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, -128.0, 128.0, FLAGS },
{ "digital_peak", "Digital peak", OFFSET(digital_peak), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, -128.0, 128.0, FLAGS },
{ "true_peak", "True peak", OFFSET(true_peak), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, -128.0, 128.0, FLAGS },
{ "dialog_anchored_loudness", "Anchored loudness (Dialog)", OFFSET(dialogue_anchored_loudness), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, -128.0, 128.0, FLAGS },
{ "album_anchored_loudness", "Anchored loudness (Album)", OFFSET(album_anchored_loudness), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, -128.0, 128.0, FLAGS },
{ NULL },
};
static const AVClass layout_class = {
.class_name = "AVIAMFSubmixLayout",
.item_name = av_default_item_name,
.version = LIBAVUTIL_VERSION_INT,
.option = submix_layout_options,
};
IAMF_ADD_FUNC_TEMPLATE(AVIAMFSubmix, submix, AVIAMFSubmixLayout, layout, s)
#undef OFFSET
#define OFFSET(x) offsetof(AVIAMFSubmix, x)
static const AVOption submix_presentation_options[] = {
{ "default_mix_gain", "Default mix gain", OFFSET(default_mix_gain), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, -128.0, 128.0, FLAGS },
{ NULL },
};
static void *submix_presentation_child_next(void *obj, void *prev)
{
AVIAMFSubmix *sub_mix = obj;
if (!prev)
return sub_mix->output_mix_config;
return NULL;
}
static const AVClass *submix_presentation_child_iterate(void **opaque)
{
uintptr_t i = (uintptr_t)*opaque;
const AVClass *ret = NULL;
switch(i) {
case 0:
ret = &element_class;
break;
case 1:
ret = &layout_class;
break;
case 2:
ret = &param_definition_class;
break;
default:
break;
}
if (ret)
*opaque = (void*)(i + 1);
return ret;
}
static const AVClass submix_class = {
.class_name = "AVIAMFSubmix",
.item_name = av_default_item_name,
.version = LIBAVUTIL_VERSION_INT,
.option = submix_presentation_options,
.child_next = submix_presentation_child_next,
.child_class_iterate = submix_presentation_child_iterate,
};
#undef OFFSET
#define OFFSET(x) offsetof(AVIAMFMixPresentation, x)
static const AVOption mix_presentation_options[] = {
{ "annotations", "set annotations", OFFSET(annotations), AV_OPT_TYPE_DICT, {.str = NULL }, 0, 0, FLAGS },
{ NULL },
};
#undef OFFSET
#undef FLAGS
static const AVClass *mix_presentation_child_iterate(void **opaque)
{
uintptr_t i = (uintptr_t)*opaque;
const AVClass *ret = NULL;
if (i)
ret = &submix_class;
if (ret)
*opaque = (void*)(i + 1);
return ret;
}
static const AVClass mix_presentation_class = {
.class_name = "AVIAMFMixPresentation",
.item_name = av_default_item_name,
.version = LIBAVUTIL_VERSION_INT,
.option = mix_presentation_options,
.child_class_iterate = mix_presentation_child_iterate,
};
const AVClass *av_iamf_mix_presentation_get_class(void)
{
return &mix_presentation_class;
}
AVIAMFMixPresentation *av_iamf_mix_presentation_alloc(void)
{
AVIAMFMixPresentation *mix_presentation = av_mallocz(sizeof(*mix_presentation));
if (mix_presentation) {
mix_presentation->av_class = &mix_presentation_class;
av_opt_set_defaults(mix_presentation);
}
return mix_presentation;
}
IAMF_ADD_FUNC_TEMPLATE(AVIAMFMixPresentation, mix_presentation, AVIAMFSubmix, submix, es)
void av_iamf_mix_presentation_free(AVIAMFMixPresentation **pmix_presentation)
{
AVIAMFMixPresentation *mix_presentation = *pmix_presentation;
if (!mix_presentation)
return;
for (int i = 0; i < mix_presentation->nb_submixes; i++) {
AVIAMFSubmix *sub_mix = mix_presentation->submixes[i];
for (int j = 0; j < sub_mix->nb_elements; j++) {
AVIAMFSubmixElement *submix_element = sub_mix->elements[j];
av_opt_free(submix_element);
av_free(submix_element->element_mix_config);
av_free(submix_element);
}
av_free(sub_mix->elements);
for (int j = 0; j < sub_mix->nb_layouts; j++) {
AVIAMFSubmixLayout *submix_layout = sub_mix->layouts[j];
av_opt_free(submix_layout);
av_free(submix_layout);
}
av_free(sub_mix->layouts);
av_free(sub_mix->output_mix_config);
av_free(sub_mix);
}
av_opt_free(mix_presentation);
av_free(mix_presentation->submixes);
av_freep(pmix_presentation);
}
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