diff options
| author | Michael Niedermayer <michaelni@gmx.at> | 2015-06-24 17:00:58 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2015-06-24 17:03:38 +0200 |
| commit | 8ff09e90986941942f4dc9eb3dc11073215589a3 (patch) | |
| tree | 3787ade8ff6a3ee82e08da49455f75225d3601b4 /libavcodec | |
| parent | 5a1f7852495950a6d0e24d34bcae0aa76ddaca80 (diff) | |
avcodec/jpeg2000dec: Use 32x32->64bit for 5/3 dequantization
This fixes overflows, using fewer bits would impact high bit depth quality
Fixes Ticket4654
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/jpeg2000dec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c index 8f38c1d784..be78660911 100644 --- a/libavcodec/jpeg2000dec.c +++ b/libavcodec/jpeg2000dec.c @@ -1437,7 +1437,7 @@ static void dequantization_int(int x, int y, Jpeg2000Cblk *cblk, int32_t *datap = &comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x]; int *src = t1->data[j]; for (i = 0; i < w; ++i) - datap[i] = (src[i] * band->i_stepsize) / 32768; + datap[i] = (src[i] * (int64_t)band->i_stepsize) / 32768; } } |