a0008bee496ce900df0e05899735cd734fb0787b
[libav.git] / libswscale / rgb2rgb.c
1 /*
2 * rgb2rgb.c, Software RGB to RGB convertor
3 * pluralize by Software PAL8 to RGB convertor
4 * Software YUV to YUV convertor
5 * Software YUV to RGB convertor
6 * Written by Nick Kurshev.
7 * palette & YUV & runtime CPU stuff by Michael (michaelni@gmx.at)
8 *
9 * This file is part of FFmpeg.
10 *
11 * FFmpeg is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * FFmpeg is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with FFmpeg; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 *
25 * the C code (not assembly, mmx, ...) of this file can be used
26 * under the LGPL license too
27 */
28 #include <inttypes.h>
29 #include "config.h"
30 #include "rgb2rgb.h"
31 #include "swscale.h"
32 #include "swscale_internal.h"
33 #include "x86_cpu.h"
34 #include "bswap.h"
35
36 #define FAST_BGR2YV12 // use 7 bit coeffs instead of 15bit
37
38 void (*rgb24to32)(const uint8_t *src,uint8_t *dst,long src_size);
39 void (*rgb24to16)(const uint8_t *src,uint8_t *dst,long src_size);
40 void (*rgb24to15)(const uint8_t *src,uint8_t *dst,long src_size);
41 void (*rgb32to24)(const uint8_t *src,uint8_t *dst,long src_size);
42 void (*rgb32to16)(const uint8_t *src,uint8_t *dst,long src_size);
43 void (*rgb32to15)(const uint8_t *src,uint8_t *dst,long src_size);
44 void (*rgb15to16)(const uint8_t *src,uint8_t *dst,long src_size);
45 void (*rgb15to24)(const uint8_t *src,uint8_t *dst,long src_size);
46 void (*rgb15to32)(const uint8_t *src,uint8_t *dst,long src_size);
47 void (*rgb16to15)(const uint8_t *src,uint8_t *dst,long src_size);
48 void (*rgb16to24)(const uint8_t *src,uint8_t *dst,long src_size);
49 void (*rgb16to32)(const uint8_t *src,uint8_t *dst,long src_size);
50 //void (*rgb24tobgr32)(const uint8_t *src, uint8_t *dst, long src_size);
51 void (*rgb24tobgr24)(const uint8_t *src, uint8_t *dst, long src_size);
52 void (*rgb24tobgr16)(const uint8_t *src, uint8_t *dst, long src_size);
53 void (*rgb24tobgr15)(const uint8_t *src, uint8_t *dst, long src_size);
54 void (*rgb32tobgr32)(const uint8_t *src, uint8_t *dst, long src_size);
55 //void (*rgb32tobgr24)(const uint8_t *src, uint8_t *dst, long src_size);
56 void (*rgb32tobgr16)(const uint8_t *src, uint8_t *dst, long src_size);
57 void (*rgb32tobgr15)(const uint8_t *src, uint8_t *dst, long src_size);
58
59 void (*yv12toyuy2)(const uint8_t *ysrc, const uint8_t *usrc, const uint8_t *vsrc, uint8_t *dst,
60 long width, long height,
61 long lumStride, long chromStride, long dstStride);
62 void (*yv12touyvy)(const uint8_t *ysrc, const uint8_t *usrc, const uint8_t *vsrc, uint8_t *dst,
63 long width, long height,
64 long lumStride, long chromStride, long dstStride);
65 void (*yuv422ptoyuy2)(const uint8_t *ysrc, const uint8_t *usrc, const uint8_t *vsrc, uint8_t *dst,
66 long width, long height,
67 long lumStride, long chromStride, long dstStride);
68 void (*yuy2toyv12)(const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
69 long width, long height,
70 long lumStride, long chromStride, long srcStride);
71 void (*rgb24toyv12)(const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
72 long width, long height,
73 long lumStride, long chromStride, long srcStride);
74 void (*planar2x)(const uint8_t *src, uint8_t *dst, long width, long height,
75 long srcStride, long dstStride);
76 void (*interleaveBytes)(uint8_t *src1, uint8_t *src2, uint8_t *dst,
77 long width, long height, long src1Stride,
78 long src2Stride, long dstStride);
79 void (*vu9_to_vu12)(const uint8_t *src1, const uint8_t *src2,
80 uint8_t *dst1, uint8_t *dst2,
81 long width, long height,
82 long srcStride1, long srcStride2,
83 long dstStride1, long dstStride2);
84 void (*yvu9_to_yuy2)(const uint8_t *src1, const uint8_t *src2, const uint8_t *src3,
85 uint8_t *dst,
86 long width, long height,
87 long srcStride1, long srcStride2,
88 long srcStride3, long dstStride);
89
90 #if defined(ARCH_X86) && defined(CONFIG_GPL)
91 static const uint64_t mmx_null __attribute__((aligned(8))) = 0x0000000000000000ULL;
92 static const uint64_t mmx_one __attribute__((aligned(8))) = 0xFFFFFFFFFFFFFFFFULL;
93 static const uint64_t mask32b attribute_used __attribute__((aligned(8))) = 0x000000FF000000FFULL;
94 static const uint64_t mask32g attribute_used __attribute__((aligned(8))) = 0x0000FF000000FF00ULL;
95 static const uint64_t mask32r attribute_used __attribute__((aligned(8))) = 0x00FF000000FF0000ULL;
96 static const uint64_t mask32 __attribute__((aligned(8))) = 0x00FFFFFF00FFFFFFULL;
97 static const uint64_t mask3216br __attribute__((aligned(8))) = 0x00F800F800F800F8ULL;
98 static const uint64_t mask3216g __attribute__((aligned(8))) = 0x0000FC000000FC00ULL;
99 static const uint64_t mask3215g __attribute__((aligned(8))) = 0x0000F8000000F800ULL;
100 static const uint64_t mul3216 __attribute__((aligned(8))) = 0x2000000420000004ULL;
101 static const uint64_t mul3215 __attribute__((aligned(8))) = 0x2000000820000008ULL;
102 static const uint64_t mask24b attribute_used __attribute__((aligned(8))) = 0x00FF0000FF0000FFULL;
103 static const uint64_t mask24g attribute_used __attribute__((aligned(8))) = 0xFF0000FF0000FF00ULL;
104 static const uint64_t mask24r attribute_used __attribute__((aligned(8))) = 0x0000FF0000FF0000ULL;
105 static const uint64_t mask24l __attribute__((aligned(8))) = 0x0000000000FFFFFFULL;
106 static const uint64_t mask24h __attribute__((aligned(8))) = 0x0000FFFFFF000000ULL;
107 static const uint64_t mask24hh __attribute__((aligned(8))) = 0xffff000000000000ULL;
108 static const uint64_t mask24hhh __attribute__((aligned(8))) = 0xffffffff00000000ULL;
109 static const uint64_t mask24hhhh __attribute__((aligned(8))) = 0xffffffffffff0000ULL;
110 static const uint64_t mask15b __attribute__((aligned(8))) = 0x001F001F001F001FULL; /* 00000000 00011111 xxB */
111 static const uint64_t mask15rg __attribute__((aligned(8))) = 0x7FE07FE07FE07FE0ULL; /* 01111111 11100000 RGx */
112 static const uint64_t mask15s __attribute__((aligned(8))) = 0xFFE0FFE0FFE0FFE0ULL;
113 static const uint64_t mask15g __attribute__((aligned(8))) = 0x03E003E003E003E0ULL;
114 static const uint64_t mask15r __attribute__((aligned(8))) = 0x7C007C007C007C00ULL;
115 #define mask16b mask15b
116 static const uint64_t mask16g __attribute__((aligned(8))) = 0x07E007E007E007E0ULL;
117 static const uint64_t mask16r __attribute__((aligned(8))) = 0xF800F800F800F800ULL;
118 static const uint64_t red_16mask __attribute__((aligned(8))) = 0x0000f8000000f800ULL;
119 static const uint64_t green_16mask __attribute__((aligned(8))) = 0x000007e0000007e0ULL;
120 static const uint64_t blue_16mask __attribute__((aligned(8))) = 0x0000001f0000001fULL;
121 static const uint64_t red_15mask __attribute__((aligned(8))) = 0x00007c0000007c00ULL;
122 static const uint64_t green_15mask __attribute__((aligned(8))) = 0x000003e0000003e0ULL;
123 static const uint64_t blue_15mask __attribute__((aligned(8))) = 0x0000001f0000001fULL;
124
125 #ifdef FAST_BGR2YV12
126 static const uint64_t bgr2YCoeff attribute_used __attribute__((aligned(8))) = 0x000000210041000DULL;
127 static const uint64_t bgr2UCoeff attribute_used __attribute__((aligned(8))) = 0x0000FFEEFFDC0038ULL;
128 static const uint64_t bgr2VCoeff attribute_used __attribute__((aligned(8))) = 0x00000038FFD2FFF8ULL;
129 #else
130 static const uint64_t bgr2YCoeff attribute_used __attribute__((aligned(8))) = 0x000020E540830C8BULL;
131 static const uint64_t bgr2UCoeff attribute_used __attribute__((aligned(8))) = 0x0000ED0FDAC23831ULL;
132 static const uint64_t bgr2VCoeff attribute_used __attribute__((aligned(8))) = 0x00003831D0E6F6EAULL;
133 #endif
134 static const uint64_t bgr2YOffset attribute_used __attribute__((aligned(8))) = 0x1010101010101010ULL;
135 static const uint64_t bgr2UVOffset attribute_used __attribute__((aligned(8))) = 0x8080808080808080ULL;
136 static const uint64_t w1111 attribute_used __attribute__((aligned(8))) = 0x0001000100010001ULL;
137
138 #if 0
139 static volatile uint64_t __attribute__((aligned(8))) b5Dither;
140 static volatile uint64_t __attribute__((aligned(8))) g5Dither;
141 static volatile uint64_t __attribute__((aligned(8))) g6Dither;
142 static volatile uint64_t __attribute__((aligned(8))) r5Dither;
143
144 static uint64_t __attribute__((aligned(8))) dither4[2]={
145 0x0103010301030103LL,
146 0x0200020002000200LL,};
147
148 static uint64_t __attribute__((aligned(8))) dither8[2]={
149 0x0602060206020602LL,
150 0x0004000400040004LL,};
151 #endif
152 #endif /* defined(ARCH_X86) */
153
154 #define RGB2YUV_SHIFT 8
155 #define BY ((int)( 0.098*(1<<RGB2YUV_SHIFT)+0.5))
156 #define BV ((int)(-0.071*(1<<RGB2YUV_SHIFT)+0.5))
157 #define BU ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
158 #define GY ((int)( 0.504*(1<<RGB2YUV_SHIFT)+0.5))
159 #define GV ((int)(-0.368*(1<<RGB2YUV_SHIFT)+0.5))
160 #define GU ((int)(-0.291*(1<<RGB2YUV_SHIFT)+0.5))
161 #define RY ((int)( 0.257*(1<<RGB2YUV_SHIFT)+0.5))
162 #define RV ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
163 #define RU ((int)(-0.148*(1<<RGB2YUV_SHIFT)+0.5))
164
165 //Note: we have C, MMX, MMX2, 3DNOW version therse no 3DNOW+MMX2 one
166 //Plain C versions
167 #undef HAVE_MMX
168 #undef HAVE_MMX2
169 #undef HAVE_3DNOW
170 #undef HAVE_SSE2
171 #define RENAME(a) a ## _C
172 #include "rgb2rgb_template.c"
173
174 #if defined(ARCH_X86) && defined(CONFIG_GPL)
175
176 //MMX versions
177 #undef RENAME
178 #define HAVE_MMX
179 #undef HAVE_MMX2
180 #undef HAVE_3DNOW
181 #undef HAVE_SSE2
182 #define RENAME(a) a ## _MMX
183 #include "rgb2rgb_template.c"
184
185 //MMX2 versions
186 #undef RENAME
187 #define HAVE_MMX
188 #define HAVE_MMX2
189 #undef HAVE_3DNOW
190 #undef HAVE_SSE2
191 #define RENAME(a) a ## _MMX2
192 #include "rgb2rgb_template.c"
193
194 //3DNOW versions
195 #undef RENAME
196 #define HAVE_MMX
197 #undef HAVE_MMX2
198 #define HAVE_3DNOW
199 #undef HAVE_SSE2
200 #define RENAME(a) a ## _3DNOW
201 #include "rgb2rgb_template.c"
202
203 #endif //ARCH_X86 || ARCH_X86_64
204
205 /*
206 rgb15->rgb16 Original by Strepto/Astral
207 ported to gcc & bugfixed : A'rpi
208 MMX2, 3DNOW optimization by Nick Kurshev
209 32bit c version, and and&add trick by Michael Niedermayer
210 */
211
212 void sws_rgb2rgb_init(int flags){
213 #if (defined(HAVE_MMX2) || defined(HAVE_3DNOW) || defined(HAVE_MMX)) && defined(CONFIG_GPL)
214 if (flags & SWS_CPU_CAPS_MMX2)
215 rgb2rgb_init_MMX2();
216 else if (flags & SWS_CPU_CAPS_3DNOW)
217 rgb2rgb_init_3DNOW();
218 else if (flags & SWS_CPU_CAPS_MMX)
219 rgb2rgb_init_MMX();
220 else
221 #endif /* defined(HAVE_MMX2) || defined(HAVE_3DNOW) || defined(HAVE_MMX) */
222 rgb2rgb_init_C();
223 }
224
225 /**
226 * Palette is assumed to contain BGR32.
227 */
228 void palette8torgb32(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
229 {
230 long i;
231
232 /*
233 for (i=0; i<num_pixels; i++)
234 ((unsigned *)dst)[i] = ((unsigned *)palette)[ src[i] ];
235 */
236
237 for (i=0; i<num_pixels; i++)
238 {
239 #ifdef WORDS_BIGENDIAN
240 dst[3]= palette[ src[i]*4+2 ];
241 dst[2]= palette[ src[i]*4+1 ];
242 dst[1]= palette[ src[i]*4+0 ];
243 #else
244 //FIXME slow?
245 dst[0]= palette[ src[i]*4+2 ];
246 dst[1]= palette[ src[i]*4+1 ];
247 dst[2]= palette[ src[i]*4+0 ];
248 //dst[3]= 0; /* do we need this cleansing? */
249 #endif
250 dst+= 4;
251 }
252 }
253
254 void palette8tobgr32(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
255 {
256 long i;
257 for (i=0; i<num_pixels; i++)
258 {
259 #ifdef WORDS_BIGENDIAN
260 dst[3]= palette[ src[i]*4+0 ];
261 dst[2]= palette[ src[i]*4+1 ];
262 dst[1]= palette[ src[i]*4+2 ];
263 #else
264 //FIXME slow?
265 dst[0]= palette[ src[i]*4+0 ];
266 dst[1]= palette[ src[i]*4+1 ];
267 dst[2]= palette[ src[i]*4+2 ];
268 //dst[3]= 0; /* do we need this cleansing? */
269 #endif
270
271 dst+= 4;
272 }
273 }
274
275 /**
276 * Palette is assumed to contain BGR32.
277 */
278 void palette8torgb24(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
279 {
280 long i;
281 /*
282 writes 1 byte o much and might cause alignment issues on some architectures?
283 for (i=0; i<num_pixels; i++)
284 ((unsigned *)(&dst[i*3])) = ((unsigned *)palette)[ src[i] ];
285 */
286 for (i=0; i<num_pixels; i++)
287 {
288 //FIXME slow?
289 dst[0]= palette[ src[i]*4+2 ];
290 dst[1]= palette[ src[i]*4+1 ];
291 dst[2]= palette[ src[i]*4+0 ];
292 dst+= 3;
293 }
294 }
295
296 void palette8tobgr24(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
297 {
298 long i;
299 /*
300 writes 1 byte o much and might cause alignment issues on some architectures?
301 for (i=0; i<num_pixels; i++)
302 ((unsigned *)(&dst[i*3])) = ((unsigned *)palette)[ src[i] ];
303 */
304 for (i=0; i<num_pixels; i++)
305 {
306 //FIXME slow?
307 dst[0]= palette[ src[i]*4+0 ];
308 dst[1]= palette[ src[i]*4+1 ];
309 dst[2]= palette[ src[i]*4+2 ];
310 dst+= 3;
311 }
312 }
313
314 /**
315 * Palette is assumed to contain bgr16, see rgb32to16 to convert the palette
316 */
317 void palette8torgb16(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
318 {
319 long i;
320 for (i=0; i<num_pixels; i++)
321 ((uint16_t *)dst)[i] = ((uint16_t *)palette)[ src[i] ];
322 }
323 void palette8tobgr16(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
324 {
325 long i;
326 for (i=0; i<num_pixels; i++)
327 ((uint16_t *)dst)[i] = bswap_16(((uint16_t *)palette)[ src[i] ]);
328 }
329
330 /**
331 * Palette is assumed to contain BGR15, see rgb32to15 to convert the palette.
332 */
333 void palette8torgb15(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
334 {
335 long i;
336 for (i=0; i<num_pixels; i++)
337 ((uint16_t *)dst)[i] = ((uint16_t *)palette)[ src[i] ];
338 }
339 void palette8tobgr15(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
340 {
341 long i;
342 for (i=0; i<num_pixels; i++)
343 ((uint16_t *)dst)[i] = bswap_16(((uint16_t *)palette)[ src[i] ]);
344 }
345
346 void rgb32tobgr24(const uint8_t *src, uint8_t *dst, long src_size)
347 {
348 long i;
349 long num_pixels = src_size >> 2;
350 for (i=0; i<num_pixels; i++)
351 {
352 #ifdef WORDS_BIGENDIAN
353 /* RGB32 (= A,B,G,R) -> BGR24 (= B,G,R) */
354 dst[3*i + 0] = src[4*i + 1];
355 dst[3*i + 1] = src[4*i + 2];
356 dst[3*i + 2] = src[4*i + 3];
357 #else
358 dst[3*i + 0] = src[4*i + 2];
359 dst[3*i + 1] = src[4*i + 1];
360 dst[3*i + 2] = src[4*i + 0];
361 #endif
362 }
363 }
364
365 void rgb24tobgr32(const uint8_t *src, uint8_t *dst, long src_size)
366 {
367 long i;
368 for (i=0; 3*i<src_size; i++)
369 {
370 #ifdef WORDS_BIGENDIAN
371 /* RGB24 (= R,G,B) -> BGR32 (= A,R,G,B) */
372 dst[4*i + 0] = 0;
373 dst[4*i + 1] = src[3*i + 0];
374 dst[4*i + 2] = src[3*i + 1];
375 dst[4*i + 3] = src[3*i + 2];
376 #else
377 dst[4*i + 0] = src[3*i + 2];
378 dst[4*i + 1] = src[3*i + 1];
379 dst[4*i + 2] = src[3*i + 0];
380 dst[4*i + 3] = 0;
381 #endif
382 }
383 }
384
385 void rgb16tobgr32(const uint8_t *src, uint8_t *dst, long src_size)
386 {
387 const uint16_t *end;
388 uint8_t *d = (uint8_t *)dst;
389 const uint16_t *s = (uint16_t *)src;
390 end = s + src_size/2;
391 while (s < end)
392 {
393 register uint16_t bgr;
394 bgr = *s++;
395 #ifdef WORDS_BIGENDIAN
396 *d++ = 0;
397 *d++ = (bgr&0x1F)<<3;
398 *d++ = (bgr&0x7E0)>>3;
399 *d++ = (bgr&0xF800)>>8;
400 #else
401 *d++ = (bgr&0xF800)>>8;
402 *d++ = (bgr&0x7E0)>>3;
403 *d++ = (bgr&0x1F)<<3;
404 *d++ = 0;
405 #endif
406 }
407 }
408
409 void rgb16tobgr24(const uint8_t *src, uint8_t *dst, long src_size)
410 {
411 const uint16_t *end;
412 uint8_t *d = (uint8_t *)dst;
413 const uint16_t *s = (const uint16_t *)src;
414 end = s + src_size/2;
415 while (s < end)
416 {
417 register uint16_t bgr;
418 bgr = *s++;
419 *d++ = (bgr&0xF800)>>8;
420 *d++ = (bgr&0x7E0)>>3;
421 *d++ = (bgr&0x1F)<<3;
422 }
423 }
424
425 void rgb16tobgr16(const uint8_t *src, uint8_t *dst, long src_size)
426 {
427 long i;
428 long num_pixels = src_size >> 1;
429
430 for (i=0; i<num_pixels; i++)
431 {
432 unsigned b,g,r;
433 register uint16_t rgb;
434 rgb = src[2*i];
435 r = rgb&0x1F;
436 g = (rgb&0x7E0)>>5;
437 b = (rgb&0xF800)>>11;
438 dst[2*i] = (b&0x1F) | ((g&0x3F)<<5) | ((r&0x1F)<<11);
439 }
440 }
441
442 void rgb16tobgr15(const uint8_t *src, uint8_t *dst, long src_size)
443 {
444 long i;
445 long num_pixels = src_size >> 1;
446
447 for (i=0; i<num_pixels; i++)
448 {
449 unsigned b,g,r;
450 register uint16_t rgb;
451 rgb = src[2*i];
452 r = rgb&0x1F;
453 g = (rgb&0x7E0)>>5;
454 b = (rgb&0xF800)>>11;
455 dst[2*i] = (b&0x1F) | ((g&0x1F)<<5) | ((r&0x1F)<<10);
456 }
457 }
458
459 void rgb15tobgr32(const uint8_t *src, uint8_t *dst, long src_size)
460 {
461 const uint16_t *end;
462 uint8_t *d = (uint8_t *)dst;
463 const uint16_t *s = (const uint16_t *)src;
464 end = s + src_size/2;
465 while (s < end)
466 {
467 register uint16_t bgr;
468 bgr = *s++;
469 #ifdef WORDS_BIGENDIAN
470 *d++ = 0;
471 *d++ = (bgr&0x1F)<<3;
472 *d++ = (bgr&0x3E0)>>2;
473 *d++ = (bgr&0x7C00)>>7;
474 #else
475 *d++ = (bgr&0x7C00)>>7;
476 *d++ = (bgr&0x3E0)>>2;
477 *d++ = (bgr&0x1F)<<3;
478 *d++ = 0;
479 #endif
480 }
481 }
482
483 void rgb15tobgr24(const uint8_t *src, uint8_t *dst, long src_size)
484 {
485 const uint16_t *end;
486 uint8_t *d = (uint8_t *)dst;
487 const uint16_t *s = (uint16_t *)src;
488 end = s + src_size/2;
489 while (s < end)
490 {
491 register uint16_t bgr;
492 bgr = *s++;
493 *d++ = (bgr&0x7C00)>>7;
494 *d++ = (bgr&0x3E0)>>2;
495 *d++ = (bgr&0x1F)<<3;
496 }
497 }
498
499 void rgb15tobgr16(const uint8_t *src, uint8_t *dst, long src_size)
500 {
501 long i;
502 long num_pixels = src_size >> 1;
503
504 for (i=0; i<num_pixels; i++)
505 {
506 unsigned b,g,r;
507 register uint16_t rgb;
508 rgb = src[2*i];
509 r = rgb&0x1F;
510 g = (rgb&0x3E0)>>5;
511 b = (rgb&0x7C00)>>10;
512 dst[2*i] = (b&0x1F) | ((g&0x3F)<<5) | ((r&0x1F)<<11);
513 }
514 }
515
516 void rgb15tobgr15(const uint8_t *src, uint8_t *dst, long src_size)
517 {
518 long i;
519 long num_pixels = src_size >> 1;
520
521 for (i=0; i<num_pixels; i++)
522 {
523 unsigned b,g,r;
524 register uint16_t rgb;
525 rgb = src[2*i];
526 r = rgb&0x1F;
527 g = (rgb&0x3E0)>>5;
528 b = (rgb&0x7C00)>>10;
529 dst[2*i] = (b&0x1F) | ((g&0x1F)<<5) | ((r&0x1F)<<10);
530 }
531 }
532
533 void rgb8tobgr8(const uint8_t *src, uint8_t *dst, long src_size)
534 {
535 long i;
536 long num_pixels = src_size;
537 for (i=0; i<num_pixels; i++)
538 {
539 unsigned b,g,r;
540 register uint8_t rgb;
541 rgb = src[i];
542 r = (rgb&0x07);
543 g = (rgb&0x38)>>3;
544 b = (rgb&0xC0)>>6;
545 dst[i] = ((b<<1)&0x07) | ((g&0x07)<<3) | ((r&0x03)<<6);
546 }
547 }