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sws/output: remove offset/coef for alpha in rgba64 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-05-12 22:01:18 +02:00
parent e1746d057b
commit 145e644aee
1 changed files with 10 additions and 28 deletions
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38
libswscale/output.c
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@ -707,16 +707,10 @@ yuv2rgba64_X_c_template(SwsContext *c, const int16_t *lumFilter,
A1 += alpSrc[j][i * 2] * (unsigned)lumFilter[j];
A2 += alpSrc[j][i * 2 + 1] * (unsigned)lumFilter[j];
}
A1 >>= 14; // 10
A1 += 0x10000;
A2 >>= 14;
A2 += 0x10000;
A1 -= c->yuv2rgb_y_offset;
A2 -= c->yuv2rgb_y_offset;
A1 *= c->yuv2rgb_y_coeff;
A2 *= c->yuv2rgb_y_coeff;
A1 += 1 << 13; // 21
A2 += 1 << 13;
A1 >>= 1;
A1 += 0x20002000;
A2 >>= 1;
A2 += 0x20002000;
}
// 8bit: 12+15=27; 16-bit: 12+19=31
@ -789,13 +783,9 @@ yuv2rgba64_2_c_template(SwsContext *c, const int32_t *buf[2],
B = U * c->yuv2rgb_u2b_coeff;
if (hasAlpha) {
A1 = (abuf0[i * 2 ] * yalpha1 + abuf1[i * 2 ] * yalpha) >> 14;
A2 = (abuf0[i * 2 + 1] * yalpha1 + abuf1[i * 2 + 1] * yalpha) >> 14;
A1 = (abuf0[i * 2 ] * yalpha1 + abuf1[i * 2 ] * yalpha) >> 1;
A2 = (abuf0[i * 2 + 1] * yalpha1 + abuf1[i * 2 + 1] * yalpha) >> 1;
A1 -= c->yuv2rgb_y_offset;
A2 -= c->yuv2rgb_y_offset;
A1 *= c->yuv2rgb_y_coeff;
A2 *= c->yuv2rgb_y_coeff;
A1 += 1 << 13;
A2 += 1 << 13;
}
@ -838,13 +828,9 @@ yuv2rgba64_1_c_template(SwsContext *c, const int32_t *buf0,
Y2 += 1 << 13;
if (hasAlpha) {
A1 = abuf0[i * 2 ] >> 2;
A2 = abuf0[i * 2 + 1] >> 2;
A1 = abuf0[i * 2 ] << 11;
A2 = abuf0[i * 2 + 1] << 11;
A1 -= c->yuv2rgb_y_offset;
A2 -= c->yuv2rgb_y_offset;
A1 *= c->yuv2rgb_y_coeff;
A2 *= c->yuv2rgb_y_coeff;
A1 += 1 << 13;
A2 += 1 << 13;
}
@ -881,13 +867,9 @@ yuv2rgba64_1_c_template(SwsContext *c, const int32_t *buf0,
Y2 += 1 << 13;
if (hasAlpha) {
A1 = abuf0[i * 2 ] >> 2;
A2 = abuf0[i * 2 + 1] >> 2;
A1 = abuf0[i * 2 ] << 11;
A2 = abuf0[i * 2 + 1] << 11;
A1 -= c->yuv2rgb_y_offset;
A2 -= c->yuv2rgb_y_offset;
A1 *= c->yuv2rgb_y_coeff;
A2 *= c->yuv2rgb_y_coeff;
A1 += 1 << 13;
A2 += 1 << 13;
}