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
|
// 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)<<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 */
|
