Atlas - yuv_rgb_std.c
Home / ext / SDL / src / video / yuv2rgb Lines: 1 | Size: 8195 bytes [Download] [Show on GitHub] [Search similar files] [Raw] [Raw (proxy)][FILE BEGIN]1// Copyright 2016 Adrien Descamps 2// Distributed under BSD 3-Clause License 3#include "SDL_internal.h" 4 5#ifdef SDL_HAVE_YUV 6 7#include "yuv_rgb_internal.h" 8 9// divide by PRECISION_FACTOR and clamp to [0:255] interval 10// input must be in the [-128*PRECISION_FACTOR:384*PRECISION_FACTOR] range 11static uint8_t clampU8(int32_t v) 12{ 13 static const uint8_t lut[512] = 14 {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, 15 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, 16 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, 17 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, 18 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, 19 126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158, 20 159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191, 21 192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224, 22 225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255, 23 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 24 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 25 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 26 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255 27 }; 28 return lut[((v+128*PRECISION_FACTOR)>>PRECISION)&511]; 29} 30 31static uint16_t clamp10(int32_t v) 32{ 33 v >>= PRECISION; 34 if (v < 0) { 35 return 0; 36 } else if (v > 1023) { 37 return 1023; 38 } else { 39 return (uint16_t)v; 40 } 41} 42 43#define YUV_BITS 8 44 45#define STD_FUNCTION_NAME yuv420_rgb565_std 46#define YUV_FORMAT YUV_FORMAT_420 47#define RGB_FORMAT RGB_FORMAT_RGB565 48#include "yuv_rgb_std_func.h" 49 50#define STD_FUNCTION_NAME yuv420_rgb24_std 51#define YUV_FORMAT YUV_FORMAT_420 52#define RGB_FORMAT RGB_FORMAT_RGB24 53#include "yuv_rgb_std_func.h" 54 55#define STD_FUNCTION_NAME yuv420_rgba_std 56#define YUV_FORMAT YUV_FORMAT_420 57#define RGB_FORMAT RGB_FORMAT_RGBA 58#include "yuv_rgb_std_func.h" 59 60#define STD_FUNCTION_NAME yuv420_bgra_std 61#define YUV_FORMAT YUV_FORMAT_420 62#define RGB_FORMAT RGB_FORMAT_BGRA 63#include "yuv_rgb_std_func.h" 64 65#define STD_FUNCTION_NAME yuv420_argb_std 66#define YUV_FORMAT YUV_FORMAT_420 67#define RGB_FORMAT RGB_FORMAT_ARGB 68#include "yuv_rgb_std_func.h" 69 70#define STD_FUNCTION_NAME yuv420_abgr_std 71#define YUV_FORMAT YUV_FORMAT_420 72#define RGB_FORMAT RGB_FORMAT_ABGR 73#include "yuv_rgb_std_func.h" 74 75#define STD_FUNCTION_NAME yuv422_rgb565_std 76#define YUV_FORMAT YUV_FORMAT_422 77#define RGB_FORMAT RGB_FORMAT_RGB565 78#include "yuv_rgb_std_func.h" 79 80#define STD_FUNCTION_NAME yuv422_rgb24_std 81#define YUV_FORMAT YUV_FORMAT_422 82#define RGB_FORMAT RGB_FORMAT_RGB24 83#include "yuv_rgb_std_func.h" 84 85#define STD_FUNCTION_NAME yuv422_rgba_std 86#define YUV_FORMAT YUV_FORMAT_422 87#define RGB_FORMAT RGB_FORMAT_RGBA 88#include "yuv_rgb_std_func.h" 89 90#define STD_FUNCTION_NAME yuv422_bgra_std 91#define YUV_FORMAT YUV_FORMAT_422 92#define RGB_FORMAT RGB_FORMAT_BGRA 93#include "yuv_rgb_std_func.h" 94 95#define STD_FUNCTION_NAME yuv422_argb_std 96#define YUV_FORMAT YUV_FORMAT_422 97#define RGB_FORMAT RGB_FORMAT_ARGB 98#include "yuv_rgb_std_func.h" 99 100#define STD_FUNCTION_NAME yuv422_abgr_std 101#define YUV_FORMAT YUV_FORMAT_422 102#define RGB_FORMAT RGB_FORMAT_ABGR 103#include "yuv_rgb_std_func.h" 104 105#define STD_FUNCTION_NAME yuvnv12_rgb565_std 106#define YUV_FORMAT YUV_FORMAT_NV12 107#define RGB_FORMAT RGB_FORMAT_RGB565 108#include "yuv_rgb_std_func.h" 109 110#define STD_FUNCTION_NAME yuvnv12_rgb24_std 111#define YUV_FORMAT YUV_FORMAT_NV12 112#define RGB_FORMAT RGB_FORMAT_RGB24 113#include "yuv_rgb_std_func.h" 114 115#define STD_FUNCTION_NAME yuvnv12_rgba_std 116#define YUV_FORMAT YUV_FORMAT_NV12 117#define RGB_FORMAT RGB_FORMAT_RGBA 118#include "yuv_rgb_std_func.h" 119 120#define STD_FUNCTION_NAME yuvnv12_bgra_std 121#define YUV_FORMAT YUV_FORMAT_NV12 122#define RGB_FORMAT RGB_FORMAT_BGRA 123#include "yuv_rgb_std_func.h" 124 125#define STD_FUNCTION_NAME yuvnv12_argb_std 126#define YUV_FORMAT YUV_FORMAT_NV12 127#define RGB_FORMAT RGB_FORMAT_ARGB 128#include "yuv_rgb_std_func.h" 129 130#define STD_FUNCTION_NAME yuvnv12_abgr_std 131#define YUV_FORMAT YUV_FORMAT_NV12 132#define RGB_FORMAT RGB_FORMAT_ABGR 133#include "yuv_rgb_std_func.h" 134 135#undef YUV_BITS 136#define YUV_BITS 10 137 138#define STD_FUNCTION_NAME yuvp010_xbgr2101010_std 139#define YUV_FORMAT YUV_FORMAT_NV12 140#define RGB_FORMAT RGB_FORMAT_XBGR2101010 141#include "yuv_rgb_std_func.h" 142 143void rgb24_yuv420_std( 144 uint32_t width, uint32_t height, 145 const uint8_t *RGB, uint32_t RGB_stride, 146 uint8_t *Y, uint8_t *U, uint8_t *V, uint32_t Y_stride, uint32_t UV_stride, 147 YCbCrType yuv_type) 148{ 149 const RGB2YUVParam *const param = &(RGB2YUV[yuv_type]); 150 151 uint32_t x, y; 152 for(y=0; y<(height-1); y+=2) 153 { 154 const uint8_t *rgb_ptr1=RGB+y*RGB_stride, 155 *rgb_ptr2=RGB+(y+1)*RGB_stride; 156 157 uint8_t *y_ptr1=Y+y*Y_stride, 158 *y_ptr2=Y+(y+1)*Y_stride, 159 *u_ptr=U+(y/2)*UV_stride, 160 *v_ptr=V+(y/2)*UV_stride; 161 162 for(x=0; x<(width-1); x+=2) 163 { 164 // compute yuv for the four pixels, u and v values are summed 165 int32_t y_tmp, u_tmp, v_tmp; 166 167 y_tmp = param->matrix[0][0]*rgb_ptr1[0] + param->matrix[0][1]*rgb_ptr1[1] + param->matrix[0][2]*rgb_ptr1[2]; 168 u_tmp = param->matrix[1][0]*rgb_ptr1[0] + param->matrix[1][1]*rgb_ptr1[1] + param->matrix[1][2]*rgb_ptr1[2]; 169 v_tmp = param->matrix[2][0]*rgb_ptr1[0] + param->matrix[2][1]*rgb_ptr1[1] + param->matrix[2][2]*rgb_ptr1[2]; 170 y_ptr1[0]=clampU8(y_tmp+((param->y_shift)<<PRECISION)); 171 172 y_tmp = param->matrix[0][0]*rgb_ptr1[3] + param->matrix[0][1]*rgb_ptr1[4] + param->matrix[0][2]*rgb_ptr1[5]; 173 u_tmp += param->matrix[1][0]*rgb_ptr1[3] + param->matrix[1][1]*rgb_ptr1[4] + param->matrix[1][2]*rgb_ptr1[5]; 174 v_tmp += param->matrix[2][0]*rgb_ptr1[3] + param->matrix[2][1]*rgb_ptr1[4] + param->matrix[2][2]*rgb_ptr1[5]; 175 y_ptr1[1]=clampU8(y_tmp+((param->y_shift)<<PRECISION)); 176 177 y_tmp = param->matrix[0][0]*rgb_ptr2[0] + param->matrix[0][1]*rgb_ptr2[1] + param->matrix[0][2]*rgb_ptr2[2]; 178 u_tmp += param->matrix[1][0]*rgb_ptr2[0] + param->matrix[1][1]*rgb_ptr2[1] + param->matrix[1][2]*rgb_ptr2[2]; 179 v_tmp += param->matrix[2][0]*rgb_ptr2[0] + param->matrix[2][1]*rgb_ptr2[1] + param->matrix[2][2]*rgb_ptr2[2]; 180 y_ptr2[0]=clampU8(y_tmp+((param->y_shift)<<PRECISION)); 181 182 y_tmp = param->matrix[0][0]*rgb_ptr2[3] + param->matrix[0][1]*rgb_ptr2[4] + param->matrix[0][2]*rgb_ptr2[5]; 183 u_tmp += param->matrix[1][0]*rgb_ptr2[3] + param->matrix[1][1]*rgb_ptr2[4] + param->matrix[1][2]*rgb_ptr2[5]; 184 v_tmp += param->matrix[2][0]*rgb_ptr2[3] + param->matrix[2][1]*rgb_ptr2[4] + param->matrix[2][2]*rgb_ptr2[5]; 185 y_ptr2[1]=clampU8(y_tmp+((param->y_shift)<<PRECISION)); 186 187 u_ptr[0] = clampU8(u_tmp/4+(128<<PRECISION)); 188 v_ptr[0] = clampU8(v_tmp/4+(128<<PRECISION)); 189 190 rgb_ptr1 += 6; 191 rgb_ptr2 += 6; 192 y_ptr1 += 2; 193 y_ptr2 += 2; 194 u_ptr += 1; 195 v_ptr += 1; 196 } 197 } 198} 199 200#endif /* SDL_HAVE_YUV */ 201[FILE END](C) 2025 0x4248 (C) 2025 4248 Media and 4248 Systems, All part of 0x4248 See LICENCE files for more information. Not all files are by 0x4248 always check Licencing.