ffmpeg | branch: master | Michael Niedermayer <[email protected]> | Wed Jun 24 17:00:58 2015 +0200| [8ff09e90986941942f4dc9eb3dc11073215589a3] | committer: Michael Niedermayer
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 <[email protected]> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8ff09e90986941942f4dc9eb3dc11073215589a3 --- libavcodec/jpeg2000dec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c index 8f38c1d..be78660 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; } } _______________________________________________ ffmpeg-cvslog mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
