int av_stream_add_side_data(AVStream *st, enum AVPacketSideDataType type, uint8_t *data, size_t size) { AVPacketSideData *sd, *tmp; int i; for (i = 0; i < st->nb_side_data; i++) { sd = &st->side_data[i]; if (sd->type == type) { av_freep(&sd->data); sd->data = data; sd->size = size; return 0; } } tmp = av_realloc_array(st->side_data, st->nb_side_data + 1, sizeof(*tmp)); if (!tmp) { return AVERROR(ENOMEM); } st->side_data = tmp; st->nb_side_data++; sd = &st->side_data[st->nb_side_data - 1]; sd->type = type; sd->data = data; sd->size = size; return 0; }