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vf_select: add NULL-checks in uninit

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Fix NULL pointer dereference in case of failed initialization.

Signed-off-by: Stefano Sabatini <stefano.sabatini-lala@poste.it>
This commit is contained in:
William Yu 2011-08-11 15:47:33 +02:00 committed by Stefano Sabatini
parent 43fab7aafc
commit 30ea0e47b5
1 changed files with 4 additions and 0 deletions
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4
libavfilter/vf_select.c
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@ -319,14 +319,18 @@ static av_cold void uninit(AVFilterContext *ctx)
AVFilterBufferRef *picref;
int i;
if (select->expr)
av_expr_free(select->expr);
select->expr = NULL;
if (select->pending_frames) {
for (i = 0; i < av_fifo_size(select->pending_frames)/sizeof(picref); i++) {
av_fifo_generic_read(select->pending_frames, &picref, sizeof(picref), NULL);
avfilter_unref_buffer(picref);
}
av_fifo_free(select->pending_frames);
}
select->pending_frames = NULL;
}
AVFilter avfilter_vf_select = {