/* * Copyright (c) 2023 Jan Ekström <jeebjp@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 <stdio.h>#include "libavutil/frame.c"#include "libavutil/internal.h" static void print_entries(const AVFrameSideData **sd, const int nb_sd){    for (int i = 0; i < nb_sd; i++) {        const AVFrameSideData *entry = sd[i];         printf("sd %d (size %"SIZE_SPECIFIER"), %s",               i, entry->size, av_frame_side_data_name(entry->type));         if (entry->type != AV_FRAME_DATA_SEI_UNREGISTERED) {            putchar('\n');            continue;        }         printf(": %d\n", *(int32_t *)entry->data);    }} typedef struct FrameSideDataSet {    AVFrameSideData **sd;    int            nb_sd;} FrameSideDataSet; int main(void){    FrameSideDataSet set = { 0 };     av_assert0(        av_frame_side_data_new(&set.sd, &set.nb_sd,                               AV_FRAME_DATA_CONTENT_LIGHT_LEVEL,                               sizeof(int64_t), 0));    av_assert0(        av_frame_side_data_new(&set.sd, &set.nb_sd,                               AV_FRAME_DATA_CONTENT_LIGHT_LEVEL,                               sizeof(int32_t), AV_FRAME_SIDE_DATA_FLAG_REPLACE));     // test entries in the middle    for (int value = 1; value < 4; value++) {        AVFrameSideData *sd = av_frame_side_data_new(            &set.sd, &set.nb_sd, AV_FRAME_DATA_SEI_UNREGISTERED,            sizeof(int32_t), 0);         av_assert0(sd);         *(int32_t *)sd->data = value;    }     av_assert0(        av_frame_side_data_new(            &set.sd, &set.nb_sd, AV_FRAME_DATA_SPHERICAL,           sizeof(int64_t), 0));     av_assert0(        av_frame_side_data_new(            &set.sd, &set.nb_sd, AV_FRAME_DATA_SPHERICAL,            sizeof(int32_t), AV_FRAME_SIDE_DATA_FLAG_REPLACE));     // test entries at the end    for (int value = 1; value < 4; value++) {        AVFrameSideData *sd = av_frame_side_data_new(            &set.sd, &set.nb_sd, AV_FRAME_DATA_SEI_UNREGISTERED,            sizeof(int32_t), 0);         av_assert0(sd);         *(int32_t *)sd->data = value + 3;    }     puts("Initial addition results with duplicates:");    print_entries((const AVFrameSideData **)set.sd, set.nb_sd);     {        AVFrameSideData *sd = av_frame_side_data_new(            &set.sd, &set.nb_sd, AV_FRAME_DATA_SEI_UNREGISTERED,            sizeof(int32_t), AV_FRAME_SIDE_DATA_FLAG_UNIQUE);         av_assert0(sd);         *(int32_t *)sd->data = 1337;    }     puts("\nFinal state after a single 'no-duplicates' addition:");    print_entries((const AVFrameSideData **)set.sd, set.nb_sd);     av_frame_side_data_free(&set.sd, &set.nb_sd);     return 0;}