From 5a079a2d114f96d4847d1ee305d5b7c16eeec50e Mon Sep 17 00:00:00 2001 From: 3gg <3gg@shellblade.net> Date: Sat, 27 Dec 2025 12:03:39 -0800 Subject: Initial commit --- contrib/SDL-3.2.8/src/video/yuv2rgb/yuv_rgb_std.c | 200 ++++++++++++++++++++++ 1 file changed, 200 insertions(+) create mode 100644 contrib/SDL-3.2.8/src/video/yuv2rgb/yuv_rgb_std.c (limited to 'contrib/SDL-3.2.8/src/video/yuv2rgb/yuv_rgb_std.c') diff --git a/contrib/SDL-3.2.8/src/video/yuv2rgb/yuv_rgb_std.c b/contrib/SDL-3.2.8/src/video/yuv2rgb/yuv_rgb_std.c new file mode 100644 index 0000000..0fa900d --- /dev/null +++ b/contrib/SDL-3.2.8/src/video/yuv2rgb/yuv_rgb_std.c @@ -0,0 +1,200 @@ +// Copyright 2016 Adrien Descamps +// Distributed under BSD 3-Clause License +#include "SDL_internal.h" + +#ifdef 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)<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)<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)<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)<