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vf_transpose: avoid multiple calls to avfilter_draw_slice()

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avfilter_draw_slice() is already called in the end_frame() callback,
this avoids multiple calls. This is done by adding a null draw_slice()
callback.

In particular fix crash occurring with -vf transpose=3,hflip, fix trac
issue #371.
This commit is contained in:
Stefano Sabatini 2011-07-29 20:19:04 +02:00
parent 2dd2abe391
commit d9c23a0d5a
1 changed files with 3 additions and 0 deletions
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3
libavfilter/vf_transpose.c
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@ -195,6 +195,8 @@ static void end_frame(AVFilterLink *inlink)
avfilter_unref_buffer(outpic);
}
static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }
AVFilter avfilter_vf_transpose = {
.name = "transpose",
.description = NULL_IF_CONFIG_SMALL("Transpose input video."),
@ -207,6 +209,7 @@ AVFilter avfilter_vf_transpose = {
.inputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.start_frame = start_frame,
.draw_slice = null_draw_slice,
.end_frame = end_frame,
.min_perms = AV_PERM_READ, },
{ .name = NULL}},