diff options
Diffstat (limited to 'src/video_out/yuv2rgb_mmx.c')
| -rw-r--r-- | src/video_out/yuv2rgb_mmx.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/src/video_out/yuv2rgb_mmx.c b/src/video_out/yuv2rgb_mmx.c index ea4cf9698..d085fc635 100644 --- a/src/video_out/yuv2rgb_mmx.c +++ b/src/video_out/yuv2rgb_mmx.c @@ -49,6 +49,27 @@ do { \ movq_r2m (src, dest); \ } while (0) +static mmx_t mmx_subYw = {0x1010101010101010}; +static mmx_t mmx_addYw = {0x0000000000000000}; + +void mmx_yuv2rgb_set_gamma(int gamma) +{ +int a,s,i; + + if( gamma <= 16 ) { + a = 0; + s = 16 - gamma; + } else { + a = gamma - 16; + s = 0; + } + + for( i = 0; i < 8; i++ ) { + *((unsigned char *)&mmx_subYw + i) = s; + *((unsigned char *)&mmx_addYw + i) = a; + } +} + static inline void mmx_yuv2rgb (uint8_t * py, uint8_t * pu, uint8_t * pv) { static mmx_t mmx_80w = {0x0080008000800080}; @@ -56,15 +77,14 @@ static inline void mmx_yuv2rgb (uint8_t * py, uint8_t * pu, uint8_t * pv) static mmx_t mmx_U_blue = {0x4093409340934093}; static mmx_t mmx_V_red = {0x3312331233123312}; static mmx_t mmx_V_green = {0xe5fce5fce5fce5fc}; - static mmx_t mmx_10w = {0x1010101010101010}; static mmx_t mmx_00ffw = {0x00ff00ff00ff00ff}; static mmx_t mmx_Y_coeff = {0x253f253f253f253f}; movq_m2r (*py, mm6); // mm6 = Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 pxor_r2r (mm4, mm4); // mm4 = 0 - psubusb_m2r (mmx_10w, mm6); // Y -= 16 - + psubusb_m2r (mmx_subYw, mm6); // Y -= 16 + paddusb_m2r (mmx_addYw, mm6); movd_m2r (*pu, mm0); // mm0 = 00 00 00 00 u3 u2 u1 u0 movq_r2r (mm6, mm7); // mm7 = Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 |