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vf_overlay: implement poll_frame()

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Signal that it can output a frame when there are frames on the main
input and EOF on the overlay input, but a frame is buffered -- e.g.
single picture overlay.
This commit is contained in:
Anton Khirnov 2012-04-01 18:51:27 +02:00
parent 90f65dc6cf
commit e36b25d1df
1 changed files with 14 additions and 1 deletions
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15
libavfilter/vf_overlay.c
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@ -345,6 +345,18 @@ static void null_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir) {
static void null_end_frame(AVFilterLink *inlink) { }
static int poll_frame(AVFilterLink *link)
{
AVFilterContext *s = link->src;
OverlayContext *over = s->priv;
int ret = avfilter_poll_frame(s->inputs[OVERLAY]);
if (ret == AVERROR_EOF)
ret = !!over->overpicref;
return ret && avfilter_poll_frame(s->inputs[MAIN]);
}
AVFilter avfilter_vf_overlay = {
.name = "overlay",
.description = NULL_IF_CONFIG_SMALL("Overlay a video source on top of the input."),
@ -376,6 +388,7 @@ AVFilter avfilter_vf_overlay = {
{ .name = NULL}},
.outputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output, },
.config_props = config_output,
.poll_frame = poll_frame },
{ .name = NULL}},
};