Function ring_drain

libavformat/async.c:162–168

}

static int ring_drain(RingBuffer *ring, int offset)
{
    av_assert2(offset >= -ring_size_of_read_back(ring));
    av_assert2(offset <= ring_size(ring));
    ring->read_pos += offset;
    return 0;
}

static int async_check_interrupt(void *arg)
{