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 |
11 | static 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 | |
31 | static 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 | |
143 | void 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 | |