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swscale/utils: Use normal bilinear scaler if fast cannot be used due to tiny dimensions 

Fixes Ticket4960

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 1edf129cbc)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-01-04 23:22:25 +01:00
parent 1363d0759d
commit c3abdd0f44
1 changed files with 6 additions and 0 deletions
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6
libswscale/utils.c
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@ -1045,6 +1045,12 @@ av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
srcW, srcH, dstW, dstH); srcW, srcH, dstW, dstH);
return AVERROR(EINVAL); return AVERROR(EINVAL);
} }
if (flags & SWS_FAST_BILINEAR) {
if (srcW < 8 || dstW < 8) {
flags ^= SWS_FAST_BILINEAR | SWS_BILINEAR;
c->flags = flags;
}
}
if (!dstFilter) if (!dstFilter)
dstFilter = &dummyFilter; dstFilter = &dummyFilter;