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swscale: fix NULL checking in sws_alloc_context()

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sws_getCachedContext() and sws_getContext() expect sws_alloc_context()
to return NULL when out of memory, as follows.

    if (!(context = sws_alloc_context()))
        return NULL;

This patch fixes sws_alloc_context() to return NULL in that case.

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
This commit is contained in:
Xi Wang 2013-01-04 21:15:33 +00:00 committed by Derek Buitenhuis
parent 3b81bba3bc
commit f73f76fd20
1 changed files with 4 additions and 2 deletions
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6
libswscale/utils.c
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@ -844,8 +844,10 @@ SwsContext *sws_alloc_context(void)
{
SwsContext *c = av_mallocz(sizeof(SwsContext));
c->av_class = &sws_context_class;
av_opt_set_defaults(c);
if (c) {
c->av_class = &sws_context_class;
av_opt_set_defaults(c);
}
return c;
}