2 * (C) GraÅžvydas "notaz" Ignotas, 2011,2012
4 * This work is licensed under the terms of any of these licenses
6 * - GNU GPL, version 2 or later.
7 * - GNU LGPL, version 2.1 or later.
8 * See the COPYING file in the top-level directory.
14 * note: these are intended for testing and should be avoided
15 * in favor of NEON version or platform-specific conversion
18 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
19 #define SWAP16(x) __builtin_bswap16(x)
20 #define LE16TOHx2(x) ((SWAP16((x) >> 16) << 16) | SWAP16(x))
22 #define LE16TOHx2(x) (x)
27 void bgr555_to_rgb565(void *dst_, const void *src_, int bytes)
29 const unsigned int *src = src_;
30 unsigned int *dst = dst_;
31 unsigned int x, p, r, g, b;
33 for (x = 0; x < bytes / 4; x++) {
34 p = LE16TOHx2(src[x]);
36 r = (p & 0x001f001f) << 11;
37 g = (p & 0x03e003e0) << 1;
38 b = (p & 0x7c007c00) >> 10;
48 void bgr888_to_rgb565(void *dst_, const void *src_, int bytes)
50 const unsigned char *src = src_;
51 unsigned int *dst = dst_;
52 unsigned int r1, g1, b1, r2, g2, b2;
54 for (; bytes >= 6; bytes -= 6, src += 6, dst++) {
61 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
62 *dst = (r1 << 24) | (g1 << 19) | (b1 << 13) |
63 (r2 << 8) | (g2 << 3) | (b2 >> 3);
65 *dst = (r2 << 24) | (g2 << 19) | (b2 << 13) |
66 (r1 << 8) | (g1 << 3) | (b1 >> 3);
72 void rgb888_to_rgb565(void *dst, const void *src, int bytes) {}
73 void bgr888_to_rgb888(void *dst, const void *src, int bytes) {}
75 #endif // __ARM_NEON__
78 static int yuv_ry[32], yuv_gy[32], yuv_by[32];
79 static unsigned char yuv_u[32 * 2], yuv_v[32 * 2];
81 void bgr_to_uyvy_init(void)
85 /* init yuv converter:
86 y0 = (int)((0.299f * r0) + (0.587f * g0) + (0.114f * b0));
87 y1 = (int)((0.299f * r1) + (0.587f * g1) + (0.114f * b1));
88 u = (int)(8 * 0.565f * (b0 - y0)) + 128;
89 v = (int)(8 * 0.713f * (r0 - y0)) + 128;
91 for (i = 0; i < 32; i++) {
92 yuv_ry[i] = (int)(0.299f * i * 65536.0f + 0.5f);
93 yuv_gy[i] = (int)(0.587f * i * 65536.0f + 0.5f);
94 yuv_by[i] = (int)(0.114f * i * 65536.0f + 0.5f);
96 for (i = -32; i < 32; i++) {
97 v = (int)(8 * 0.565f * i) + 128;
103 v = (int)(8 * 0.713f * i) + 128;
112 void rgb565_to_uyvy(void *d, const void *s, int pixels)
114 unsigned int *dst = d;
115 const unsigned short *src = s;
116 const unsigned char *yu = yuv_u + 32;
117 const unsigned char *yv = yuv_v + 32;
118 int r0, g0, b0, r1, g1, b1;
121 for (; pixels > 0; src += 2, dst++, pixels -= 2)
123 r0 = (src[0] >> 11) & 0x1f;
124 g0 = (src[0] >> 6) & 0x1f;
126 r1 = (src[1] >> 11) & 0x1f;
127 g1 = (src[1] >> 6) & 0x1f;
129 y0 = (yuv_ry[r0] + yuv_gy[g0] + yuv_by[b0]) >> 16;
130 y1 = (yuv_ry[r1] + yuv_gy[g1] + yuv_by[b1]) >> 16;
133 // valid Y range seems to be 16..235
134 y0 = 16 + 219 * y0 / 31;
135 y1 = 16 + 219 * y1 / 31;
137 *dst = (y1 << 24) | (v << 16) | (y0 << 8) | u;
141 void bgr555_to_uyvy(void *d, const void *s, int pixels)
143 unsigned int *dst = d;
144 const unsigned short *src = s;
145 const unsigned char *yu = yuv_u + 32;
146 const unsigned char *yv = yuv_v + 32;
147 int r0, g0, b0, r1, g1, b1;
150 for (; pixels > 0; src += 2, dst++, pixels -= 2)
152 b0 = (src[0] >> 10) & 0x1f;
153 g0 = (src[0] >> 5) & 0x1f;
155 b1 = (src[1] >> 10) & 0x1f;
156 g1 = (src[1] >> 5) & 0x1f;
158 y0 = (yuv_ry[r0] + yuv_gy[g0] + yuv_by[b0]) >> 16;
159 y1 = (yuv_ry[r1] + yuv_gy[g1] + yuv_by[b1]) >> 16;
162 y0 = 16 + 219 * y0 / 31;
163 y1 = 16 + 219 * y1 / 31;
165 *dst = (y1 << 24) | (v << 16) | (y0 << 8) | u;
169 void bgr888_to_uyvy(void *d, const void *s, int pixels)
171 unsigned int *dst = d;
172 const unsigned char *src8 = s;
173 const unsigned char *yu = yuv_u + 32;
174 const unsigned char *yv = yuv_v + 32;
175 int r0, g0, b0, r1, g1, b1;
178 for (; pixels > 0; src8 += 3*2, dst++, pixels -= 2)
180 r0 = src8[0], g0 = src8[1], b0 = src8[2];
181 r1 = src8[3], g1 = src8[4], b1 = src8[5];
182 y0 = (r0 * 19595 + g0 * 38470 + b0 * 7471) >> 16;
183 y1 = (r1 * 19595 + g1 * 38470 + b1 * 7471) >> 16;
184 u = yu[(b0 - y0) / 8];
185 v = yv[(r0 - y0) / 8];
186 y0 = 16 + 219 * y0 / 255;
187 y1 = 16 + 219 * y1 / 255;
189 *dst = (y1 << 24) | (v << 16) | (y0 << 8) | u;