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lavfi/blend: always peek the first frame of each queue.

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Before the change, filter_frame() always waited for 2 samples in the
bottom frames queue. This notably fixes commands such as
./ffplay tests/lena.pnm -vf split,blend=c0_mode=addition
This commit is contained in:
Clément Bœsch 2013-03-22 09:54:06 +01:00
parent 859f7da543
commit 89b4e758d3
1 changed files with 3 additions and 3 deletions
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6
libavfilter/vf_blend.c
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@ -359,7 +359,7 @@ static int request_frame(AVFilterLink *outlink)
b->frame_requested = 1;
while (b->frame_requested) {
in = ff_bufqueue_peek(&b->queue_top, TOP) ? BOTTOM : TOP;
in = ff_bufqueue_peek(&b->queue_top, 0) ? BOTTOM : TOP;
ret = ff_request_frame(ctx->inputs[in]);
if (ret < 0)
return ret;
@ -413,8 +413,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
while (1) {
AVFrame *top_buf, *bottom_buf, *out_buf;
if (!ff_bufqueue_peek(&b->queue_top, TOP) ||
!ff_bufqueue_peek(&b->queue_bottom, BOTTOM)) break;
if (!ff_bufqueue_peek(&b->queue_top, 0) ||
!ff_bufqueue_peek(&b->queue_bottom, 0)) break;
top_buf = ff_bufqueue_get(&b->queue_top);
bottom_buf = ff_bufqueue_get(&b->queue_bottom);