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swscale: fix NULL checking in sws_alloc_context()
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>
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@ -844,8 +844,10 @@ SwsContext *sws_alloc_context(void)
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{
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SwsContext *c = av_mallocz(sizeof(SwsContext));
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if (c) {
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c->av_class = &sws_context_class;
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av_opt_set_defaults(c);
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}
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return c;
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}
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