Author: marco
Date: Wed Aug 15 23:10:00 2007
New Revision: 829
Log:
small optimization to help the compiler unroll the loop
Modified:
dirac/libavcodec/dirac.c
Modified: dirac/libavcodec/dirac.c
==============================================================================
--- dirac/libavcodec/dirac.c (original)
+++ dirac/libavcodec/dirac.c Wed Aug 15 23:10:00 2007
@@ -2160,17 +2160,13 @@ START_TIMER
linein = pixels;
for (y = 0; y < height * 2; y++) {
for (x = 10; x < outwidth - 10; x += 2) {
+ uint8_t *li1 = &linein[x];
+ uint8_t *li2 = &linein[x];
int i;
int val = 0;
- for (i = 0; i <= 4; i++) {
- int xpos;
- xpos = x - 2 * i;
- val += t[i] * linein[xpos];
-
- xpos = x + 2 * i + 2;
- val += t[i] * linein[xpos];
- }
+ for (i = 0; i <= 4; i++)
+ val += t[i] * (li1[-i] + li2[-i]);
val += 128;
val >>= 8;
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