Function av_buffer_make_writable

libavutil/buffer.c:165–181

}

int av_buffer_make_writable(AVBufferRef **pbuf)
{
    AVBufferRef *newbuf, *buf = *pbuf;

    if (av_buffer_is_writable(buf))
        return 0;

    newbuf = av_buffer_alloc(buf->size);
    if (!newbuf)
        return AVERROR(ENOMEM);

    memcpy(newbuf->data, buf->data, buf->size);

    buffer_replace(pbuf, &newbuf);

    return 0;
}

int av_buffer_realloc(AVBufferRef **pbuf, size_t size)
{