| // Copyright 2016 Adrien Descamps |
| // Distributed under BSD 3-Clause License |
| #include "SDL_internal.h" |
| |
| #if SDL_HAVE_YUV |
| |
| #include "yuv_rgb_internal.h" |
| |
| // divide by PRECISION_FACTOR and clamp to [0:255] interval |
| // input must be in the [-128*PRECISION_FACTOR:384*PRECISION_FACTOR] range |
| static uint8_t clampU8(int32_t v) |
| { |
| static const uint8_t lut[512] = |
| {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46, |
| 47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90, |
| 91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125, |
| 126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158, |
| 159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191, |
| 192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224, |
| 225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255, |
| 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, |
| 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, |
| 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, |
| 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255 |
| }; |
| return lut[((v+128*PRECISION_FACTOR)>>PRECISION)&511]; |
| } |
| |
| static uint16_t clamp10(int32_t v) |
| { |
| v >>= PRECISION; |
| if (v < 0) { |
| return 0; |
| } else if (v > 1023) { |
| return 1023; |
| } else { |
| return (uint16_t)v; |
| } |
| } |
| |
| #define YUV_BITS 8 |
| |
| #define STD_FUNCTION_NAME yuv420_rgb565_std |
| #define YUV_FORMAT YUV_FORMAT_420 |
| #define RGB_FORMAT RGB_FORMAT_RGB565 |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuv420_rgb24_std |
| #define YUV_FORMAT YUV_FORMAT_420 |
| #define RGB_FORMAT RGB_FORMAT_RGB24 |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuv420_rgba_std |
| #define YUV_FORMAT YUV_FORMAT_420 |
| #define RGB_FORMAT RGB_FORMAT_RGBA |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuv420_bgra_std |
| #define YUV_FORMAT YUV_FORMAT_420 |
| #define RGB_FORMAT RGB_FORMAT_BGRA |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuv420_argb_std |
| #define YUV_FORMAT YUV_FORMAT_420 |
| #define RGB_FORMAT RGB_FORMAT_ARGB |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuv420_abgr_std |
| #define YUV_FORMAT YUV_FORMAT_420 |
| #define RGB_FORMAT RGB_FORMAT_ABGR |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuv422_rgb565_std |
| #define YUV_FORMAT YUV_FORMAT_422 |
| #define RGB_FORMAT RGB_FORMAT_RGB565 |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuv422_rgb24_std |
| #define YUV_FORMAT YUV_FORMAT_422 |
| #define RGB_FORMAT RGB_FORMAT_RGB24 |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuv422_rgba_std |
| #define YUV_FORMAT YUV_FORMAT_422 |
| #define RGB_FORMAT RGB_FORMAT_RGBA |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuv422_bgra_std |
| #define YUV_FORMAT YUV_FORMAT_422 |
| #define RGB_FORMAT RGB_FORMAT_BGRA |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuv422_argb_std |
| #define YUV_FORMAT YUV_FORMAT_422 |
| #define RGB_FORMAT RGB_FORMAT_ARGB |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuv422_abgr_std |
| #define YUV_FORMAT YUV_FORMAT_422 |
| #define RGB_FORMAT RGB_FORMAT_ABGR |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuvnv12_rgb565_std |
| #define YUV_FORMAT YUV_FORMAT_NV12 |
| #define RGB_FORMAT RGB_FORMAT_RGB565 |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuvnv12_rgb24_std |
| #define YUV_FORMAT YUV_FORMAT_NV12 |
| #define RGB_FORMAT RGB_FORMAT_RGB24 |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuvnv12_rgba_std |
| #define YUV_FORMAT YUV_FORMAT_NV12 |
| #define RGB_FORMAT RGB_FORMAT_RGBA |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuvnv12_bgra_std |
| #define YUV_FORMAT YUV_FORMAT_NV12 |
| #define RGB_FORMAT RGB_FORMAT_BGRA |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuvnv12_argb_std |
| #define YUV_FORMAT YUV_FORMAT_NV12 |
| #define RGB_FORMAT RGB_FORMAT_ARGB |
| #include "yuv_rgb_std_func.h" |
| |
| #define STD_FUNCTION_NAME yuvnv12_abgr_std |
| #define YUV_FORMAT YUV_FORMAT_NV12 |
| #define RGB_FORMAT RGB_FORMAT_ABGR |
| #include "yuv_rgb_std_func.h" |
| |
| #undef YUV_BITS |
| #define YUV_BITS 10 |
| |
| #define STD_FUNCTION_NAME yuvp010_xbgr2101010_std |
| #define YUV_FORMAT YUV_FORMAT_NV12 |
| #define RGB_FORMAT RGB_FORMAT_XBGR2101010 |
| #include "yuv_rgb_std_func.h" |
| |
| void rgb24_yuv420_std( |
| uint32_t width, uint32_t height, |
| const uint8_t *RGB, uint32_t RGB_stride, |
| uint8_t *Y, uint8_t *U, uint8_t *V, uint32_t Y_stride, uint32_t UV_stride, |
| YCbCrType yuv_type) |
| { |
| const RGB2YUVParam *const param = &(RGB2YUV[yuv_type]); |
| |
| uint32_t x, y; |
| for(y=0; y<(height-1); y+=2) |
| { |
| const uint8_t *rgb_ptr1=RGB+y*RGB_stride, |
| *rgb_ptr2=RGB+(y+1)*RGB_stride; |
| |
| uint8_t *y_ptr1=Y+y*Y_stride, |
| *y_ptr2=Y+(y+1)*Y_stride, |
| *u_ptr=U+(y/2)*UV_stride, |
| *v_ptr=V+(y/2)*UV_stride; |
| |
| for(x=0; x<(width-1); x+=2) |
| { |
| // compute yuv for the four pixels, u and v values are summed |
| int32_t y_tmp, u_tmp, v_tmp; |
| |
| y_tmp = param->matrix[0][0]*rgb_ptr1[0] + param->matrix[0][1]*rgb_ptr1[1] + param->matrix[0][2]*rgb_ptr1[2]; |
| u_tmp = param->matrix[1][0]*rgb_ptr1[0] + param->matrix[1][1]*rgb_ptr1[1] + param->matrix[1][2]*rgb_ptr1[2]; |
| v_tmp = param->matrix[2][0]*rgb_ptr1[0] + param->matrix[2][1]*rgb_ptr1[1] + param->matrix[2][2]*rgb_ptr1[2]; |
| y_ptr1[0]=clampU8(y_tmp+((param->y_shift)<<PRECISION)); |
| |
| y_tmp = param->matrix[0][0]*rgb_ptr1[3] + param->matrix[0][1]*rgb_ptr1[4] + param->matrix[0][2]*rgb_ptr1[5]; |
| u_tmp += param->matrix[1][0]*rgb_ptr1[3] + param->matrix[1][1]*rgb_ptr1[4] + param->matrix[1][2]*rgb_ptr1[5]; |
| v_tmp += param->matrix[2][0]*rgb_ptr1[3] + param->matrix[2][1]*rgb_ptr1[4] + param->matrix[2][2]*rgb_ptr1[5]; |
| y_ptr1[1]=clampU8(y_tmp+((param->y_shift)<<PRECISION)); |
| |
| y_tmp = param->matrix[0][0]*rgb_ptr2[0] + param->matrix[0][1]*rgb_ptr2[1] + param->matrix[0][2]*rgb_ptr2[2]; |
| u_tmp += param->matrix[1][0]*rgb_ptr2[0] + param->matrix[1][1]*rgb_ptr2[1] + param->matrix[1][2]*rgb_ptr2[2]; |
| v_tmp += param->matrix[2][0]*rgb_ptr2[0] + param->matrix[2][1]*rgb_ptr2[1] + param->matrix[2][2]*rgb_ptr2[2]; |
| y_ptr2[0]=clampU8(y_tmp+((param->y_shift)<<PRECISION)); |
| |
| y_tmp = param->matrix[0][0]*rgb_ptr2[3] + param->matrix[0][1]*rgb_ptr2[4] + param->matrix[0][2]*rgb_ptr2[5]; |
| u_tmp += param->matrix[1][0]*rgb_ptr2[3] + param->matrix[1][1]*rgb_ptr2[4] + param->matrix[1][2]*rgb_ptr2[5]; |
| v_tmp += param->matrix[2][0]*rgb_ptr2[3] + param->matrix[2][1]*rgb_ptr2[4] + param->matrix[2][2]*rgb_ptr2[5]; |
| y_ptr2[1]=clampU8(y_tmp+((param->y_shift)<<PRECISION)); |
| |
| u_ptr[0] = clampU8(u_tmp/4+(128<<PRECISION)); |
| v_ptr[0] = clampU8(v_tmp/4+(128<<PRECISION)); |
| |
| rgb_ptr1 += 6; |
| rgb_ptr2 += 6; |
| y_ptr1 += 2; |
| y_ptr2 += 2; |
| u_ptr += 1; |
| v_ptr += 1; |
| } |
| } |
| } |
| |
| #endif /* SDL_HAVE_YUV */ |
