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lavfi: avfilter_merge_formats: handle case where inputs are same

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This fixes a double-free crash if lists are the same due to the two
merge_ref() calls at the end of the (useless) merging that happens.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
(cherry picked from commit 11b6a82412bcd372adf694a26d83b07d337e1325)

Conflicts:

	libavfilter/formats.c

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
(cherry picked from commit e5f4e249422834f727bcd432b73af971277f1371)

Signed-off-by: Anton Khirnov <anton@khirnov.net>
(cherry picked from commit b6c5848a1f8fc2755ea70d325acaddae9fac45ab)

Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Mina Nagy Zaki 2011-06-08 19:24:25 +03:00 committed by Anton Khirnov
parent c82ae85a8a
commit a4e277312c
1 changed files with 3 additions and 0 deletions
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libavfilter/formats.c
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@ -44,6 +44,9 @@ AVFilterFormats *avfilter_merge_formats(AVFilterFormats *a, AVFilterFormats *b)
AVFilterFormats *ret;
unsigned i, j, k = 0;
if (a == b)
return a;
ret = av_mallocz(sizeof(AVFilterFormats));
/* merge list of formats */