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avcdoec/huffyuvenc: optimize sub_left_prediction()

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-01-20 22:12:56 +01:00
parent f70d7eb20c
commit f9c7b14c04
1 changed files with 15 additions and 8 deletions
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23
libavcodec/huffyuvenc.c
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@ -69,15 +69,22 @@ static inline int sub_left_prediction(HYuvContext *s, uint8_t *dst,
} else { } else {
const uint16_t *src16 = (const uint16_t *)src; const uint16_t *src16 = (const uint16_t *)src;
uint16_t *dst16 = ( uint16_t *)dst; uint16_t *dst16 = ( uint16_t *)dst;
if (w < 32) {
for (i = 0; i < w; i++) { for (i = 0; i < w; i++) {
const int temp = src16[i]; const int temp = src16[i];
dst16[i] = temp - left; dst16[i] = temp - left;
left = temp; left = temp;
}
return left;
} else {
for (i = 0; i < 16; i++) {
const int temp = src16[i];
dst16[i] = temp - left;
left = temp;
}
s->llviddsp.diff_int16(dst16 + 16, src16 + 16, src16 + 15, s->n - 1, w - 16);
return src16[w-1];
} }
return left;
//FIXME optimize
} }
} }