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sws/output: use unsigned variables where harmless overflows are expected.

signed overflow is undefined in C ...

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-09-10 20:55:45 +02:00
parent 17b3251c6c
commit 14de55784d

View File

@ -175,7 +175,7 @@ yuv2planeX_16_c_template(const int16_t *filter, int filterSize,
* reasonable filterSize), and re-add that at the end. */
val -= 0x40000000;
for (j = 0; j < filterSize; j++)
val += src[j][i] * filter[j];
val += src[j][i] * (unsigned)filter[j];
output_pixel(&dest[i], val, 0x8000, int);
}
@ -627,12 +627,12 @@ yuv2rgb48_X_c_template(SwsContext *c, const int16_t *lumFilter,
int R, G, B;
for (j = 0; j < lumFilterSize; j++) {
Y1 += lumSrc[j][i * 2] * lumFilter[j];
Y2 += lumSrc[j][i * 2 + 1] * lumFilter[j];
Y1 += lumSrc[j][i * 2] * (unsigned)lumFilter[j];
Y2 += lumSrc[j][i * 2 + 1] * (unsigned)lumFilter[j];
}
for (j = 0; j < chrFilterSize; j++) {
U += chrUSrc[j][i] * chrFilter[j];
V += chrVSrc[j][i] * chrFilter[j];
for (j = 0; j < chrFilterSize; j++) {;
U += chrUSrc[j][i] * (unsigned)chrFilter[j];
V += chrVSrc[j][i] * (unsigned)chrFilter[j];
}
// 8bit: 12+15=27; 16-bit: 12+19=31