static int request_frame(AVFilterLink *outlink)
{
FifoContext *fifo = outlink->src->priv;
int ret = 0;
if (!fifo->root.next) {
if ((ret = ff_request_frame(outlink->src->inputs[0])) < 0) {
if (ret == AVERROR_EOF && outlink->request_samples)
return return_audio_frame(outlink->src);
return ret;
}
av_assert0(fifo->root.next);
}
if (outlink->request_samples) {
return return_audio_frame(outlink->src);
} else {
ret = ff_filter_frame(outlink, fifo->root.next->frame);
queue_pop(fifo);
}
return ret;
}
static int request_frame(AVFilterLink *outlink)
{
FifoContext *fifo = outlink->src->priv;
int ret = 0;
if (!fifo->root.next) {
if ((ret = ff_request_frame(outlink->src->inputs[0])) < 0)
return ret;
av_assert0(fifo->root.next);
}
/* by doing this, we give ownership of the reference to the next filter,
* so we don't have to worry about dereferencing it ourselves. */
switch (outlink->type) {
case AVMEDIA_TYPE_VIDEO:
if ((ret = ff_start_frame(outlink, fifo->root.next->buf)) < 0 ||
(ret = ff_draw_slice(outlink, 0, outlink->h, 1)) < 0 ||
(ret = ff_end_frame(outlink)) < 0)
return ret;
queue_pop(fifo);
break;
case AVMEDIA_TYPE_AUDIO:
if (outlink->request_samples) {
return return_audio_frame(outlink->src);
} else {
ret = ff_filter_samples(outlink, fifo->root.next->buf);
queue_pop(fifo);
}
break;
default:
return AVERROR(EINVAL);
}
return ret;
}
