ref: 48e202712769741daf7806b0bbc6cd0d2fd5a50b
parent: ebb9eb6fea94a263e919b76ec0f0bdb0dcacdd60
author: Sigrid Haflínudóttir <[email protected]>
date: Wed Sep 23 10:46:20 EDT 2020
YUV: even faster
--- a/yuv.c
+++ b/yuv.c
@@ -17,32 +17,27 @@
#define ONE do{ \yy1 = (int)*Y * 0x10101; \
- r = yy1 + 91881*cr1; \
- r = (r & 0xff000000) ? ~(r >> 31) : (r>>16); \
- g = yy1 - go; \
- g = (g & 0xff000000) ? ~(g >> 31) : (g>>16); \
b = yy1 + 116130*cb1; \
- b = (b & 0xff000000) ? ~(b >> 31) : (b>>16); \
- RGB[2] = r; \
- RGB[1] = g; \
- RGB[0] = b; \
+ RGB[0] = (b >> 24) ? ~(b >> 31) : (b>>16); \
+ g = yy1 - go; \
+ RGB[1] = (g >> 24) ? ~(g >> 31) : (g>>16); \
+ r = yy1 + 91881*cr1; \
+ RGB[2] = (r >> 24) ? ~(r >> 31) : (r>>16); \
}while(0)
ONE; Y += 1; RGB += 3;
ONE; Y += Y_stride; RGB += RGB_stride;
ONE; Y -= 1; RGB -= 3;
- ONE; Y -= Y_stride; RGB -= RGB_stride;
+ ONE; Y -= Y_stride; RGB -= RGB_stride - 6;
Y += 2;
U += 1;
V += 1;
-
- RGB += 6;
}
- Y += 2*Y_stride - x;
+ Y += Y_stride*2 - x;
U += UV_stride - x/2;
V += UV_stride - x/2;
- RGB += 2*RGB_stride - 3*x;
+ RGB += RGB_stride*2 - 3*x;
}
}