mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2026-11-06 05:17:42 +00:00
Martin Mirchev
ca85613d10
Print the child class tree of the IAMF AVClasses as returned by av_opt_child_class_iterate() and look up options of the child classes with av_opt_find2() and AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ. Signed-off-by: Martin Mirchev <mmirchev@comp.nus.edu.sg>
69 lines
2.5 KiB
C
69 lines
2.5 KiB
C
/*
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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 <stdio.h>
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#include "libavutil/iamf.h"
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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static void print_class_tree(const AVClass *class, int depth)
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{
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const AVClass *child;
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void *iter = NULL;
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printf("%*s%s\n", depth * 2, "", class->class_name);
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if (depth >= 8)
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return;
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while ((child = av_opt_child_class_iterate(class, &iter)))
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print_class_tree(child, depth + 1);
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}
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static void find_option(const AVClass *class, const char *name)
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{
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const AVOption *o = av_opt_find2(&class, name, NULL, 0,
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AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ,
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NULL);
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printf("%s: %s %s\n", class->class_name, name, o ? "found" : "not found");
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}
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int main(void)
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{
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const AVClass *audio_element = av_iamf_audio_element_get_class();
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const AVClass *mix_presentation = av_iamf_mix_presentation_get_class();
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const AVClass *param_definition = av_iamf_param_definition_get_class();
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printf("Testing av_opt_child_class_iterate()\n");
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print_class_tree(audio_element, 0);
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print_class_tree(mix_presentation, 0);
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print_class_tree(param_definition, 0);
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printf("\nTesting av_opt_find2() with AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ\n");
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find_option(audio_element, "default_w");
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find_option(audio_element, "ch_layout");
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find_option(mix_presentation, "annotations");
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find_option(mix_presentation, "default_mix_gain");
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find_option(mix_presentation, "headphones_rendering_mode");
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find_option(mix_presentation, "sound_system");
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find_option(mix_presentation, "parameter_rate");
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find_option(param_definition, "parameter_rate");
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find_option(param_definition, "subblock_duration");
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return 0;
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}
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