1 /**************************************************************************
2 *
3 * Copyright 2010 VMware, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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19 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20 * USE OR OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * The above copyright notice and this permission notice (including the
23 * next paragraph) shall be included in all copies or substantial portions
24 * of the Software.
25 *
26 **************************************************************************/
27
28
29 /**
30 * @file
31 * YUV colorspace conversion.
32 *
33 * @author Brian Paul <brianp@vmware.com>
34 * @author Michal Krol <michal@vmware.com>
35 * @author Jose Fonseca <jfonseca@vmware.com>
36 *
37 * See also:
38 * - http://www.fourcc.org/fccyvrgb.php
39 * - http://msdn.microsoft.com/en-us/library/ms893078
40 * - http://en.wikipedia.org/wiki/YUV
41 */
42
43
44 #ifndef U_FORMAT_YUV_H_
45 #define U_FORMAT_YUV_H_
46
47
48 #include "pipe/p_compiler.h"
49 #include "util/u_math.h"
50
51
52 /*
53 * TODO: Ensure we use consistent and right floating formulas, with enough
54 * precision in the coefficients.
55 */
56
57 static inline void
util_format_rgb_float_to_yuv(float r,float g,float b,uint8_t * y,uint8_t * u,uint8_t * v)58 util_format_rgb_float_to_yuv(float r, float g, float b,
59 uint8_t *y, uint8_t *u, uint8_t *v)
60 {
61 const float _r = SATURATE(r);
62 const float _g = SATURATE(g);
63 const float _b = SATURATE(b);
64
65 const float scale = 255.0f;
66
67 const int _y = scale * ( (0.257f * _r) + (0.504f * _g) + (0.098f * _b));
68 const int _u = scale * (-(0.148f * _r) - (0.291f * _g) + (0.439f * _b));
69 const int _v = scale * ( (0.439f * _r) - (0.368f * _g) - (0.071f * _b));
70
71 *y = _y + 16;
72 *u = _u + 128;
73 *v = _v + 128;
74 }
75
76
77 static inline void
util_format_yuv_to_rgb_float(uint8_t y,uint8_t u,uint8_t v,float * r,float * g,float * b)78 util_format_yuv_to_rgb_float(uint8_t y, uint8_t u, uint8_t v,
79 float *r, float *g, float *b)
80 {
81 const int _y = y - 16;
82 const int _u = u - 128;
83 const int _v = v - 128;
84
85 const float y_factor = 255.0f / 219.0f;
86
87 const float scale = 1.0f / 255.0f;
88
89 *r = scale * (y_factor * _y + 1.596f * _v);
90 *g = scale * (y_factor * _y - 0.391f * _u - 0.813f * _v);
91 *b = scale * (y_factor * _y + 2.018f * _u );
92 }
93
94
95 static inline void
util_format_rgb_8unorm_to_yuv(uint8_t r,uint8_t g,uint8_t b,uint8_t * y,uint8_t * u,uint8_t * v)96 util_format_rgb_8unorm_to_yuv(uint8_t r, uint8_t g, uint8_t b,
97 uint8_t *y, uint8_t *u, uint8_t *v)
98 {
99 *y = (( 66 * r + 129 * g + 25 * b + 128) >> 8) + 16;
100 *u = (( -38 * r - 74 * g + 112 * b + 128) >> 8) + 128;
101 *v = (( 112 * r - 94 * g - 18 * b + 128) >> 8) + 128;
102 }
103
104
105 static inline void
util_format_yuv_to_rgb_8unorm(uint8_t y,uint8_t u,uint8_t v,uint8_t * r,uint8_t * g,uint8_t * b)106 util_format_yuv_to_rgb_8unorm(uint8_t y, uint8_t u, uint8_t v,
107 uint8_t *r, uint8_t *g, uint8_t *b)
108 {
109 const int _y = y - 16;
110 const int _u = u - 128;
111 const int _v = v - 128;
112
113 const int _r = (298 * _y + 409 * _v + 128) >> 8;
114 const int _g = (298 * _y - 100 * _u - 208 * _v + 128) >> 8;
115 const int _b = (298 * _y + 516 * _u + 128) >> 8;
116
117 *r = CLAMP(_r, 0, 255);
118 *g = CLAMP(_g, 0, 255);
119 *b = CLAMP(_b, 0, 255);
120 }
121
122
123
124 void
125 util_format_uyvy_unpack_rgba_float(void *dst_row, unsigned dst_stride,
126 const uint8_t *src_row, unsigned src_stride,
127 unsigned width, unsigned height);
128
129 void
130 util_format_uyvy_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
131 const uint8_t *src_row, unsigned src_stride,
132 unsigned width, unsigned height);
133
134 void
135 util_format_uyvy_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride,
136 const float *src_row, unsigned src_stride,
137 unsigned width, unsigned height);
138
139 void
140 util_format_uyvy_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
141 const uint8_t *src_row, unsigned src_stride,
142 unsigned width, unsigned height);
143
144 void
145 util_format_uyvy_fetch_rgba(void *dst, const uint8_t *src,
146 unsigned i, unsigned j);
147
148 void
149 util_format_yuyv_unpack_rgba_float(void *dst_row, unsigned dst_stride,
150 const uint8_t *src_row, unsigned src_stride,
151 unsigned width, unsigned height);
152
153 void
154 util_format_yuyv_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
155 const uint8_t *src_row, unsigned src_stride,
156 unsigned width, unsigned height);
157
158 void
159 util_format_yuyv_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride,
160 const float *src_row, unsigned src_stride,
161 unsigned width, unsigned height);
162
163 void
164 util_format_yuyv_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
165 const uint8_t *src_row, unsigned src_stride,
166 unsigned width, unsigned height);
167
168 void
169 util_format_yuyv_fetch_rgba(void *dst, const uint8_t *src,
170 unsigned i, unsigned j);
171
172 void
173 util_format_r8g8_b8g8_unorm_unpack_rgba_float(void *dst_row, unsigned dst_stride,
174 const uint8_t *src_row, unsigned src_stride,
175 unsigned width, unsigned height);
176
177 void
178 util_format_r8g8_b8g8_unorm_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
179 const uint8_t *src_row, unsigned src_stride,
180 unsigned width, unsigned height);
181
182 void
183 util_format_r8g8_b8g8_unorm_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride,
184 const float *src_row, unsigned src_stride,
185 unsigned width, unsigned height);
186
187 void
188 util_format_r8g8_b8g8_unorm_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
189 const uint8_t *src_row, unsigned src_stride,
190 unsigned width, unsigned height);
191
192 void
193 util_format_r8g8_b8g8_unorm_fetch_rgba(void *dst, const uint8_t *src,
194 unsigned i, unsigned j);
195
196 void
197 util_format_g8r8_g8b8_unorm_unpack_rgba_float(void *dst_row, unsigned dst_stride,
198 const uint8_t *src_row, unsigned src_stride,
199 unsigned width, unsigned height);
200
201 void
202 util_format_g8r8_g8b8_unorm_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
203 const uint8_t *src_row, unsigned src_stride,
204 unsigned width, unsigned height);
205
206 void
207 util_format_g8r8_g8b8_unorm_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride,
208 const float *src_row, unsigned src_stride,
209 unsigned width, unsigned height);
210
211 void
212 util_format_g8r8_g8b8_unorm_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
213 const uint8_t *src_row, unsigned src_stride,
214 unsigned width, unsigned height);
215
216 void
217 util_format_g8r8_g8b8_unorm_fetch_rgba(void *dst, const uint8_t *src,
218 unsigned i, unsigned j);
219
220 #endif /* U_FORMAT_YUV_H_ */
221