Function av_fast_realloc

libavutil/mem.c:497–525

}

void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
{
    size_t max_size;

    if (min_size <= *size)
        return ptr;

    max_size = atomic_load_explicit(&max_alloc_size, memory_order_relaxed);
    /* *size is an unsigned, so the real maximum is <= UINT_MAX. */
    max_size = FFMIN(max_size, UINT_MAX);

    if (min_size > max_size) {
        *size = 0;
        return NULL;
    }

    min_size = FFMIN(max_size, FFMAX(min_size + min_size / 16 + 32, min_size));

    ptr = av_realloc(ptr, min_size);
    /* we could set this to the unmodified min_size but this is safer
     * if the user lost the ptr and uses NULL now
     */
    if (!ptr)
        min_size = 0;

    *size = min_size;

    return ptr;
}

static inline void fast_malloc(void *ptr, unsigned int *size, size_t min_size, int zero_realloc)
{