Author: post
Date: 2010-08-08 16:49:36 +0200 (Sun, 08 Aug 2010)
New Revision: 3487
Modified:
trunk/plugins/demosaic/demosaic.c
Log:
Avoid 2 multiplies by 3 when looking up pixel values in demosaic.
Modified: trunk/plugins/demosaic/demosaic.c
===================================================================
--- trunk/plugins/demosaic/demosaic.c 2010-08-08 14:36:00 UTC (rev 3486)
+++ trunk/plugins/demosaic/demosaic.c 2010-08-08 14:49:36 UTC (rev 3487)
@@ -399,6 +399,7 @@
int row, col, c, d;
int diffA, diffB, guessA, guessB;
int p = image->pitch;
+ int p3 = p*3;
gushort (*pix)[4];
{
@@ -420,8 +421,8 @@
diffB = ( ABS(pix[-2*p][c] - pix[ 0][c]) +
ABS(pix[ 2*p][c] - pix[ 0][c]) +
ABS(pix[ -p][1] - pix[ p][1]) ) * 3 +
- ( ABS(pix[ 3*p][1] - pix[ p][1]) +
- ABS(pix[-3*p][1] - pix[-p][1]) ) * 2;
+ ( ABS(pix[ p3][1] - pix[ p][1]) +
+ ABS(pix[-p3][1] - pix[-p][1]) ) * 2;
if (diffA > diffB)
pix[0][1] = ULIM(guessB >> 2, pix[p][1], pix[-p][1]);
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