void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off, AVFilterPad **pads, AVFilterLink ***links, AVFilterPad *newpad) { unsigned i; idx = FFMIN(idx, *count); *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1)); *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1)); memmove(*pads + idx + 1, *pads + idx, sizeof(AVFilterPad) * (*count - idx)); memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx)); memcpy(*pads + idx, newpad, sizeof(AVFilterPad)); (*links)[idx] = NULL; (*count)++; for (i = idx + 1; i < *count; i++) if (*links[i]) (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++; }