diff options
Diffstat (limited to 'common/scaler/hq3x.h')
| -rw-r--r-- | common/scaler/hq3x.h | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/common/scaler/hq3x.h b/common/scaler/hq3x.h index eaf67d7bb9..7437652f35 100644 --- a/common/scaler/hq3x.h +++ b/common/scaler/hq3x.h @@ -27,7 +27,7 @@ */ register int w1, w2, w3, w4, w5, w6, w7, w8, w9; - + const uint32 nextlineSrc = srcPitch / sizeof(uint16); const uint16 *p = (const uint16 *)srcPtr; @@ -49,7 +49,7 @@ #ifdef USE_ALTIVEC // The YUV threshold. static const vector unsigned char vThreshold = (vector unsigned char)((vector unsigned int)0x00300706); - + // Bit pattern mask. static const vector signed int vPatternMask1 = (vector signed int)(0x01,0x02,0x04,0x08); static const vector signed int vPatternMask2 = (vector signed int)(0x10,0x20,0x40,0x80); @@ -105,7 +105,7 @@ | | | | | | w20| w21| w22| w23| +----+----+----+----+ - + In the previous loop iteration, w11 was the center point, and our vectors contain the following data from the previous iteration: vecYUV5555 = { w11, w11, w11, w11 } @@ -125,14 +125,14 @@ vecYUV5555 = { vecYUV6789[0], vecYUV6789[0], vecYUV6789[0], vecYUV6789[0] } vecYUV1234 = { vecYUV1234[1], vecYUV1234[2], vTmp[1], vTmp[0] } vecYUV6789 = { vTmp[2], vecYUV6789[2], vecYUV6789[3], vTmp[3] } - + Beautiful, isn't it? :-) */ // Load the new values into a temporary vector (see above for an explanation) const int tmpArr[4] = {YUV(4), YUV(3), YUV(6), YUV(9)}; vector signed char vTmp = *(const vector signed char *)tmpArr; - + // Next update the data vectors vecYUV5555 = (vector signed char)vec_splat((vector unsigned int)vecYUV6789, 0); vecYUV1234 = vec_perm(vecYUV1234, vTmp, vPermuteToV1234); @@ -141,17 +141,17 @@ // Compute the absolute difference between the center point's YUV and the outer points const vector signed char vDiff1 = vec_abs(vec_sub(vecYUV5555, vecYUV1234)); const vector signed char vDiff2 = vec_abs(vec_sub(vecYUV5555, vecYUV6789)); - + // Compare the difference to the threshold (byte-wise) const vector bool char vCmp1 = vec_cmpgt((vector unsigned char)vDiff1, vThreshold); const vector bool char vCmp2 = vec_cmpgt((vector unsigned char)vDiff2, vThreshold); - + // Convert all non-zero (long) vector elements to 0xF...F, keep 0 at 0. // Then and in the patter masks. The idea is that for 0 components, we get 0, // while for the other components we get exactly the mask value. const vector signed int vPattern1 = vec_and(vec_cmpgt((vector unsigned int)vCmp1, (vector unsigned int)0), vPatternMask1); const vector signed int vPattern2 = vec_and(vec_cmpgt((vector unsigned int)vCmp2, (vector unsigned int)0), vPatternMask2); - + // Now sum up the components of all vectors. Since our pattern mask values // are all "orthogonal", this is effectively the same as ORing them all // together. In the end, the rightmost word of vSum contains the 'pattern' |