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| author | Michael Niedermayer <michaelni@gmx.at> | 2012-10-27 16:26:39 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2012-10-27 16:29:24 +0200 |
| commit | 7de21960292c15e544807f09d1bfc9935a88e5ce (patch) | |
| tree | 7c41368ed0a7a1102c8fae639a9c901877f3efff /libswscale | |
| parent | 95760b33e7a4fb06686922e93e8c6b5730e85d3f (diff) | |
| download | ffmpeg-7de21960292c15e544807f09d1bfc9935a88e5ce.tar.gz | |
sws: fix extreem downscaling
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libswscale')
| -rw-r--r-- | libswscale/utils.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libswscale/utils.c b/libswscale/utils.c index 81da98d651..2fa1c13ba6 100644 --- a/libswscale/utils.c +++ b/libswscale/utils.c @@ -230,7 +230,7 @@ static int initFilter(int16_t **outFilter, int32_t **filterPos, int minFilterSize; int64_t *filter = NULL; int64_t *filter2 = NULL; - const int64_t fone = 1LL << 54; + const int64_t fone = 1LL << (54 - FFMIN(av_log2(srcW/dstW), 8)); int ret = -1; emms_c(); // FIXME should not be required but IS (even for non-MMX versions) @@ -356,7 +356,7 @@ static int initFilter(int16_t **outFilter, int32_t **filterPos, (-12 * B - 48 * C) * d + (8 * B + 24 * C) * (1 << 30); } - coeff *= fone >> (30 + 24); + coeff /= (1LL<<54)/fone; } #if 0 else if (flags & SWS_X) { |