rgb2rgb_template.c
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1 /*
2  * software RGB to RGB converter
3  * pluralize by software PAL8 to RGB converter
4  * software YUV to YUV converter
5  * software YUV to RGB converter
6  * Written by Nick Kurshev.
7  * palette & YUV & runtime CPU stuff by Michael (michaelni@gmx.at)
8  * lot of big-endian byte order fixes by Alex Beregszaszi
9  *
10  * This file is part of Libav.
11  *
12  * Libav is free software; you can redistribute it and/or
13  * modify it under the terms of the GNU Lesser General Public
14  * License as published by the Free Software Foundation; either
15  * version 2.1 of the License, or (at your option) any later version.
16  *
17  * Libav is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20  * Lesser General Public License for more details.
21  *
22  * You should have received a copy of the GNU Lesser General Public
23  * License along with Libav; if not, write to the Free Software
24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25  */
26 
27 #include <stddef.h>
28 
29 static inline void rgb24tobgr32_c(const uint8_t *src, uint8_t *dst,
30  int src_size)
31 {
32  uint8_t *dest = dst;
33  const uint8_t *s = src;
34  const uint8_t *end = s + src_size;
35 
36  while (s < end) {
37 #if HAVE_BIGENDIAN
38  /* RGB24 (= R, G, B) -> RGB32 (= A, B, G, R) */
39  *dest++ = 255;
40  *dest++ = s[2];
41  *dest++ = s[1];
42  *dest++ = s[0];
43  s += 3;
44 #else
45  *dest++ = *s++;
46  *dest++ = *s++;
47  *dest++ = *s++;
48  *dest++ = 255;
49 #endif
50  }
51 }
52 
53 static inline void rgb32tobgr24_c(const uint8_t *src, uint8_t *dst,
54  int src_size)
55 {
56  uint8_t *dest = dst;
57  const uint8_t *s = src;
58  const uint8_t *end = s + src_size;
59 
60  while (s < end) {
61 #if HAVE_BIGENDIAN
62  /* RGB32 (= A, B, G, R) -> RGB24 (= R, G, B) */
63  s++;
64  dest[2] = *s++;
65  dest[1] = *s++;
66  dest[0] = *s++;
67  dest += 3;
68 #else
69  *dest++ = *s++;
70  *dest++ = *s++;
71  *dest++ = *s++;
72  s++;
73 #endif
74  }
75 }
76 
77 /*
78  * original by Strepto/Astral
79  * ported to gcc & bugfixed: A'rpi
80  * MMXEXT, 3DNOW optimization by Nick Kurshev
81  * 32-bit C version, and and&add trick by Michael Niedermayer
82  */
83 static inline void rgb15to16_c(const uint8_t *src, uint8_t *dst, int src_size)
84 {
85  register uint8_t *d = dst;
86  register const uint8_t *s = src;
87  register const uint8_t *end = s + src_size;
88  const uint8_t *mm_end = end - 3;
89 
90  while (s < mm_end) {
91  register unsigned x = *((const uint32_t *)s);
92  *((uint32_t *)d) = (x & 0x7FFF7FFF) + (x & 0x7FE07FE0);
93  d += 4;
94  s += 4;
95  }
96  if (s < end) {
97  register unsigned short x = *((const uint16_t *)s);
98  *((uint16_t *)d) = (x & 0x7FFF) + (x & 0x7FE0);
99  }
100 }
101 
102 static inline void rgb16to15_c(const uint8_t *src, uint8_t *dst, int src_size)
103 {
104  register uint8_t *d = dst;
105  register const uint8_t *s = src;
106  register const uint8_t *end = s + src_size;
107  const uint8_t *mm_end = end - 3;
108 
109  while (s < mm_end) {
110  register uint32_t x = *((const uint32_t *)s);
111  *((uint32_t *)d) = ((x >> 1) & 0x7FE07FE0) | (x & 0x001F001F);
112  s += 4;
113  d += 4;
114  }
115  if (s < end) {
116  register uint16_t x = *((const uint16_t *)s);
117  *((uint16_t *)d) = ((x >> 1) & 0x7FE0) | (x & 0x001F);
118  }
119 }
120 
121 static inline void rgb32to16_c(const uint8_t *src, uint8_t *dst, int src_size)
122 {
123  uint16_t *d = (uint16_t *)dst;
124  const uint8_t *s = src;
125  const uint8_t *end = s + src_size;
126 
127  while (s < end) {
128  register int rgb = *(const uint32_t *)s;
129  s += 4;
130  *d++ = ((rgb & 0xFF) >> 3) +
131  ((rgb & 0xFC00) >> 5) +
132  ((rgb & 0xF80000) >> 8);
133  }
134 }
135 
136 static inline void rgb32tobgr16_c(const uint8_t *src, uint8_t *dst,
137  int src_size)
138 {
139  uint16_t *d = (uint16_t *)dst;
140  const uint8_t *s = src;
141  const uint8_t *end = s + src_size;
142 
143  while (s < end) {
144  register int rgb = *(const uint32_t *)s;
145  s += 4;
146  *d++ = ((rgb & 0xF8) << 8) +
147  ((rgb & 0xFC00) >> 5) +
148  ((rgb & 0xF80000) >> 19);
149  }
150 }
151 
152 static inline void rgb32to15_c(const uint8_t *src, uint8_t *dst, int src_size)
153 {
154  uint16_t *d = (uint16_t *)dst;
155  const uint8_t *s = src;
156  const uint8_t *end = s + src_size;
157 
158  while (s < end) {
159  register int rgb = *(const uint32_t *)s;
160  s += 4;
161  *d++ = ((rgb & 0xFF) >> 3) +
162  ((rgb & 0xF800) >> 6) +
163  ((rgb & 0xF80000) >> 9);
164  }
165 }
166 
167 static inline void rgb32tobgr15_c(const uint8_t *src, uint8_t *dst,
168  int src_size)
169 {
170  uint16_t *d = (uint16_t *)dst;
171  const uint8_t *s = src;
172  const uint8_t *end = s + src_size;
173 
174  while (s < end) {
175  register int rgb = *(const uint32_t *)s;
176  s += 4;
177  *d++ = ((rgb & 0xF8) << 7) +
178  ((rgb & 0xF800) >> 6) +
179  ((rgb & 0xF80000) >> 19);
180  }
181 }
182 
183 static inline void rgb24tobgr16_c(const uint8_t *src, uint8_t *dst,
184  int src_size)
185 {
186  uint16_t *d = (uint16_t *)dst;
187  const uint8_t *s = src;
188  const uint8_t *end = s + src_size;
189 
190  while (s < end) {
191  const int b = *s++;
192  const int g = *s++;
193  const int r = *s++;
194  *d++ = (b >> 3) | ((g & 0xFC) << 3) | ((r & 0xF8) << 8);
195  }
196 }
197 
198 static inline void rgb24to16_c(const uint8_t *src, uint8_t *dst, int src_size)
199 {
200  uint16_t *d = (uint16_t *)dst;
201  const uint8_t *s = src;
202  const uint8_t *end = s + src_size;
203 
204  while (s < end) {
205  const int r = *s++;
206  const int g = *s++;
207  const int b = *s++;
208  *d++ = (b >> 3) | ((g & 0xFC) << 3) | ((r & 0xF8) << 8);
209  }
210 }
211 
212 static inline void rgb24tobgr15_c(const uint8_t *src, uint8_t *dst,
213  int src_size)
214 {
215  uint16_t *d = (uint16_t *)dst;
216  const uint8_t *s = src;
217  const uint8_t *end = s + src_size;
218 
219  while (s < end) {
220  const int b = *s++;
221  const int g = *s++;
222  const int r = *s++;
223  *d++ = (b >> 3) | ((g & 0xF8) << 2) | ((r & 0xF8) << 7);
224  }
225 }
226 
227 static inline void rgb24to15_c(const uint8_t *src, uint8_t *dst, int src_size)
228 {
229  uint16_t *d = (uint16_t *)dst;
230  const uint8_t *s = src;
231  const uint8_t *end = s + src_size;
232 
233  while (s < end) {
234  const int r = *s++;
235  const int g = *s++;
236  const int b = *s++;
237  *d++ = (b >> 3) | ((g & 0xF8) << 2) | ((r & 0xF8) << 7);
238  }
239 }
240 
241 /*
242  * I use less accurate approximation here by simply left-shifting the input
243  * value and filling the low order bits with zeroes. This method improves PNG
244  * compression but this scheme cannot reproduce white exactly, since it does
245  * not generate an all-ones maximum value; the net effect is to darken the
246  * image slightly.
247  *
248  * The better method should be "left bit replication":
249  *
250  * 4 3 2 1 0
251  * ---------
252  * 1 1 0 1 1
253  *
254  * 7 6 5 4 3 2 1 0
255  * ----------------
256  * 1 1 0 1 1 1 1 0
257  * |=======| |===|
258  * | leftmost bits repeated to fill open bits
259  * |
260  * original bits
261  */
262 static inline void rgb15tobgr24_c(const uint8_t *src, uint8_t *dst,
263  int src_size)
264 {
265  uint8_t *d = dst;
266  const uint16_t *s = (const uint16_t *)src;
267  const uint16_t *end = s + src_size / 2;
268 
269  while (s < end) {
270  register uint16_t bgr = *s++;
271  *d++ = (bgr & 0x1F) << 3;
272  *d++ = (bgr & 0x3E0) >> 2;
273  *d++ = (bgr & 0x7C00) >> 7;
274  }
275 }
276 
277 static inline void rgb16tobgr24_c(const uint8_t *src, uint8_t *dst,
278  int src_size)
279 {
280  uint8_t *d = (uint8_t *)dst;
281  const uint16_t *s = (const uint16_t *)src;
282  const uint16_t *end = s + src_size / 2;
283 
284  while (s < end) {
285  register uint16_t bgr = *s++;
286  *d++ = (bgr & 0x1F) << 3;
287  *d++ = (bgr & 0x7E0) >> 3;
288  *d++ = (bgr & 0xF800) >> 8;
289  }
290 }
291 
292 static inline void rgb15to32_c(const uint8_t *src, uint8_t *dst, int src_size)
293 {
294  uint8_t *d = dst;
295  const uint16_t *s = (const uint16_t *)src;
296  const uint16_t *end = s + src_size / 2;
297 
298  while (s < end) {
299  register uint16_t bgr = *s++;
300 #if HAVE_BIGENDIAN
301  *d++ = 255;
302  *d++ = (bgr & 0x7C00) >> 7;
303  *d++ = (bgr & 0x3E0) >> 2;
304  *d++ = (bgr & 0x1F) << 3;
305 #else
306  *d++ = (bgr & 0x1F) << 3;
307  *d++ = (bgr & 0x3E0) >> 2;
308  *d++ = (bgr & 0x7C00) >> 7;
309  *d++ = 255;
310 #endif
311  }
312 }
313 
314 static inline void rgb16to32_c(const uint8_t *src, uint8_t *dst, int src_size)
315 {
316  uint8_t *d = dst;
317  const uint16_t *s = (const uint16_t *)src;
318  const uint16_t *end = s + src_size / 2;
319 
320  while (s < end) {
321  register uint16_t bgr = *s++;
322 #if HAVE_BIGENDIAN
323  *d++ = 255;
324  *d++ = (bgr & 0xF800) >> 8;
325  *d++ = (bgr & 0x7E0) >> 3;
326  *d++ = (bgr & 0x1F) << 3;
327 #else
328  *d++ = (bgr & 0x1F) << 3;
329  *d++ = (bgr & 0x7E0) >> 3;
330  *d++ = (bgr & 0xF800) >> 8;
331  *d++ = 255;
332 #endif
333  }
334 }
335 
336 static inline void shuffle_bytes_2103_c(const uint8_t *src, uint8_t *dst,
337  int src_size)
338 {
339  int idx = 15 - src_size;
340  const uint8_t *s = src - idx;
341  uint8_t *d = dst - idx;
342 
343  for (; idx < 15; idx += 4) {
344  register int v = *(const uint32_t *)&s[idx], g = v & 0xff00ff00;
345  v &= 0xff00ff;
346  *(uint32_t *)&d[idx] = (v >> 16) + g + (v << 16);
347  }
348 }
349 
350 static inline void rgb24tobgr24_c(const uint8_t *src, uint8_t *dst, int src_size)
351 {
352  unsigned i;
353 
354  for (i = 0; i < src_size; i += 3) {
355  register uint8_t x = src[i + 2];
356  dst[i + 1] = src[i + 1];
357  dst[i + 2] = src[i + 0];
358  dst[i + 0] = x;
359  }
360 }
361 
362 static inline void yuvPlanartoyuy2_c(const uint8_t *ysrc, const uint8_t *usrc,
363  const uint8_t *vsrc, uint8_t *dst,
364  int width, int height,
365  int lumStride, int chromStride,
366  int dstStride, int vertLumPerChroma)
367 {
368  int y, i;
369  const int chromWidth = width >> 1;
370 
371  for (y = 0; y < height; y++) {
372 #if HAVE_FAST_64BIT
373  uint64_t *ldst = (uint64_t *)dst;
374  const uint8_t *yc = ysrc, *uc = usrc, *vc = vsrc;
375  for (i = 0; i < chromWidth; i += 2) {
376  uint64_t k = yc[0] + (uc[0] << 8) +
377  (yc[1] << 16) + (vc[0] << 24);
378  uint64_t l = yc[2] + (uc[1] << 8) +
379  (yc[3] << 16) + (vc[1] << 24);
380  *ldst++ = k + (l << 32);
381  yc += 4;
382  uc += 2;
383  vc += 2;
384  }
385 
386 #else
387  int *idst = (int32_t *)dst;
388  const uint8_t *yc = ysrc, *uc = usrc, *vc = vsrc;
389 
390  for (i = 0; i < chromWidth; i++) {
391 #if HAVE_BIGENDIAN
392  *idst++ = (yc[0] << 24) + (uc[0] << 16) +
393  (yc[1] << 8) + (vc[0] << 0);
394 #else
395  *idst++ = yc[0] + (uc[0] << 8) +
396  (yc[1] << 16) + (vc[0] << 24);
397 #endif
398  yc += 2;
399  uc++;
400  vc++;
401  }
402 #endif
403  if ((y & (vertLumPerChroma - 1)) == vertLumPerChroma - 1) {
404  usrc += chromStride;
405  vsrc += chromStride;
406  }
407  ysrc += lumStride;
408  dst += dstStride;
409  }
410 }
411 
416 static inline void yv12toyuy2_c(const uint8_t *ysrc, const uint8_t *usrc,
417  const uint8_t *vsrc, uint8_t *dst,
418  int width, int height, int lumStride,
419  int chromStride, int dstStride)
420 {
421  //FIXME interpolate chroma
422  yuvPlanartoyuy2_c(ysrc, usrc, vsrc, dst, width, height, lumStride,
423  chromStride, dstStride, 2);
424 }
425 
426 static inline void yuvPlanartouyvy_c(const uint8_t *ysrc, const uint8_t *usrc,
427  const uint8_t *vsrc, uint8_t *dst,
428  int width, int height,
429  int lumStride, int chromStride,
430  int dstStride, int vertLumPerChroma)
431 {
432  int y, i;
433  const int chromWidth = width >> 1;
434 
435  for (y = 0; y < height; y++) {
436 #if HAVE_FAST_64BIT
437  uint64_t *ldst = (uint64_t *)dst;
438  const uint8_t *yc = ysrc, *uc = usrc, *vc = vsrc;
439  for (i = 0; i < chromWidth; i += 2) {
440  uint64_t k = uc[0] + (yc[0] << 8) +
441  (vc[0] << 16) + (yc[1] << 24);
442  uint64_t l = uc[1] + (yc[2] << 8) +
443  (vc[1] << 16) + (yc[3] << 24);
444  *ldst++ = k + (l << 32);
445  yc += 4;
446  uc += 2;
447  vc += 2;
448  }
449 
450 #else
451  int *idst = (int32_t *)dst;
452  const uint8_t *yc = ysrc, *uc = usrc, *vc = vsrc;
453 
454  for (i = 0; i < chromWidth; i++) {
455 #if HAVE_BIGENDIAN
456  *idst++ = (uc[0] << 24) + (yc[0] << 16) +
457  (vc[0] << 8) + (yc[1] << 0);
458 #else
459  *idst++ = uc[0] + (yc[0] << 8) +
460  (vc[0] << 16) + (yc[1] << 24);
461 #endif
462  yc += 2;
463  uc++;
464  vc++;
465  }
466 #endif
467  if ((y & (vertLumPerChroma - 1)) == vertLumPerChroma - 1) {
468  usrc += chromStride;
469  vsrc += chromStride;
470  }
471  ysrc += lumStride;
472  dst += dstStride;
473  }
474 }
475 
480 static inline void yv12touyvy_c(const uint8_t *ysrc, const uint8_t *usrc,
481  const uint8_t *vsrc, uint8_t *dst,
482  int width, int height, int lumStride,
483  int chromStride, int dstStride)
484 {
485  //FIXME interpolate chroma
486  yuvPlanartouyvy_c(ysrc, usrc, vsrc, dst, width, height, lumStride,
487  chromStride, dstStride, 2);
488 }
489 
493 static inline void yuv422ptouyvy_c(const uint8_t *ysrc, const uint8_t *usrc,
494  const uint8_t *vsrc, uint8_t *dst,
495  int width, int height, int lumStride,
496  int chromStride, int dstStride)
497 {
498  yuvPlanartouyvy_c(ysrc, usrc, vsrc, dst, width, height, lumStride,
499  chromStride, dstStride, 1);
500 }
501 
505 static inline void yuv422ptoyuy2_c(const uint8_t *ysrc, const uint8_t *usrc,
506  const uint8_t *vsrc, uint8_t *dst,
507  int width, int height, int lumStride,
508  int chromStride, int dstStride)
509 {
510  yuvPlanartoyuy2_c(ysrc, usrc, vsrc, dst, width, height, lumStride,
511  chromStride, dstStride, 1);
512 }
513 
518 static inline void yuy2toyv12_c(const uint8_t *src, uint8_t *ydst,
519  uint8_t *udst, uint8_t *vdst,
520  int width, int height, int lumStride,
521  int chromStride, int srcStride)
522 {
523  int y;
524  const int chromWidth = width >> 1;
525 
526  for (y = 0; y < height; y += 2) {
527  int i;
528  for (i = 0; i < chromWidth; i++) {
529  ydst[2 * i + 0] = src[4 * i + 0];
530  udst[i] = src[4 * i + 1];
531  ydst[2 * i + 1] = src[4 * i + 2];
532  vdst[i] = src[4 * i + 3];
533  }
534  ydst += lumStride;
535  src += srcStride;
536 
537  for (i = 0; i < chromWidth; i++) {
538  ydst[2 * i + 0] = src[4 * i + 0];
539  ydst[2 * i + 1] = src[4 * i + 2];
540  }
541  udst += chromStride;
542  vdst += chromStride;
543  ydst += lumStride;
544  src += srcStride;
545  }
546 }
547 
548 static inline void planar2x_c(const uint8_t *src, uint8_t *dst, int srcWidth,
549  int srcHeight, int srcStride, int dstStride)
550 {
551  int x, y;
552 
553  dst[0] = src[0];
554 
555  // first line
556  for (x = 0; x < srcWidth - 1; x++) {
557  dst[2 * x + 1] = (3 * src[x] + src[x + 1]) >> 2;
558  dst[2 * x + 2] = (src[x] + 3 * src[x + 1]) >> 2;
559  }
560  dst[2 * srcWidth - 1] = src[srcWidth - 1];
561 
562  dst += dstStride;
563 
564  for (y = 1; y < srcHeight; y++) {
565  const int mmxSize = 1;
566 
567  dst[0] = (src[0] * 3 + src[srcStride]) >> 2;
568  dst[dstStride] = (src[0] + 3 * src[srcStride]) >> 2;
569 
570  for (x = mmxSize - 1; x < srcWidth - 1; x++) {
571  dst[2 * x + 1] = (src[x + 0] * 3 + src[x + srcStride + 1]) >> 2;
572  dst[2 * x + dstStride + 2] = (src[x + 0] + 3 * src[x + srcStride + 1]) >> 2;
573  dst[2 * x + dstStride + 1] = (src[x + 1] + 3 * src[x + srcStride]) >> 2;
574  dst[2 * x + 2] = (src[x + 1] * 3 + src[x + srcStride]) >> 2;
575  }
576  dst[srcWidth * 2 - 1] = (src[srcWidth - 1] * 3 + src[srcWidth - 1 + srcStride]) >> 2;
577  dst[srcWidth * 2 - 1 + dstStride] = (src[srcWidth - 1] + 3 * src[srcWidth - 1 + srcStride]) >> 2;
578 
579  dst += dstStride * 2;
580  src += srcStride;
581  }
582 
583  // last line
584  dst[0] = src[0];
585 
586  for (x = 0; x < srcWidth - 1; x++) {
587  dst[2 * x + 1] = (src[x] * 3 + src[x + 1]) >> 2;
588  dst[2 * x + 2] = (src[x] + 3 * src[x + 1]) >> 2;
589  }
590  dst[2 * srcWidth - 1] = src[srcWidth - 1];
591 }
592 
599 static inline void uyvytoyv12_c(const uint8_t *src, uint8_t *ydst,
600  uint8_t *udst, uint8_t *vdst,
601  int width, int height, int lumStride,
602  int chromStride, int srcStride)
603 {
604  int y;
605  const int chromWidth = width >> 1;
606 
607  for (y = 0; y < height; y += 2) {
608  int i;
609  for (i = 0; i < chromWidth; i++) {
610  udst[i] = src[4 * i + 0];
611  ydst[2 * i + 0] = src[4 * i + 1];
612  vdst[i] = src[4 * i + 2];
613  ydst[2 * i + 1] = src[4 * i + 3];
614  }
615  ydst += lumStride;
616  src += srcStride;
617 
618  for (i = 0; i < chromWidth; i++) {
619  ydst[2 * i + 0] = src[4 * i + 1];
620  ydst[2 * i + 1] = src[4 * i + 3];
621  }
622  udst += chromStride;
623  vdst += chromStride;
624  ydst += lumStride;
625  src += srcStride;
626  }
627 }
628 
636 void rgb24toyv12_c(const uint8_t *src, uint8_t *ydst, uint8_t *udst,
637  uint8_t *vdst, int width, int height, int lumStride,
638  int chromStride, int srcStride)
639 {
640  int y;
641  const int chromWidth = width >> 1;
642 
643  for (y = 0; y < height; y += 2) {
644  int i;
645  for (i = 0; i < chromWidth; i++) {
646  unsigned int b = src[6 * i + 0];
647  unsigned int g = src[6 * i + 1];
648  unsigned int r = src[6 * i + 2];
649 
650  unsigned int Y = ((RY * r + GY * g + BY * b) >> RGB2YUV_SHIFT) + 16;
651  unsigned int V = ((RV * r + GV * g + BV * b) >> RGB2YUV_SHIFT) + 128;
652  unsigned int U = ((RU * r + GU * g + BU * b) >> RGB2YUV_SHIFT) + 128;
653 
654  udst[i] = U;
655  vdst[i] = V;
656  ydst[2 * i] = Y;
657 
658  b = src[6 * i + 3];
659  g = src[6 * i + 4];
660  r = src[6 * i + 5];
661 
662  Y = ((RY * r + GY * g + BY * b) >> RGB2YUV_SHIFT) + 16;
663  ydst[2 * i + 1] = Y;
664  }
665  ydst += lumStride;
666  src += srcStride;
667 
668  for (i = 0; i < chromWidth; i++) {
669  unsigned int b = src[6 * i + 0];
670  unsigned int g = src[6 * i + 1];
671  unsigned int r = src[6 * i + 2];
672 
673  unsigned int Y = ((RY * r + GY * g + BY * b) >> RGB2YUV_SHIFT) + 16;
674 
675  ydst[2 * i] = Y;
676 
677  b = src[6 * i + 3];
678  g = src[6 * i + 4];
679  r = src[6 * i + 5];
680 
681  Y = ((RY * r + GY * g + BY * b) >> RGB2YUV_SHIFT) + 16;
682  ydst[2 * i + 1] = Y;
683  }
684  udst += chromStride;
685  vdst += chromStride;
686  ydst += lumStride;
687  src += srcStride;
688  }
689 }
690 
691 static void interleaveBytes_c(const uint8_t *src1, const uint8_t *src2,
692  uint8_t *dest, int width, int height,
693  int src1Stride, int src2Stride, int dstStride)
694 {
695  int h;
696 
697  for (h = 0; h < height; h++) {
698  int w;
699  for (w = 0; w < width; w++) {
700  dest[2 * w + 0] = src1[w];
701  dest[2 * w + 1] = src2[w];
702  }
703  dest += dstStride;
704  src1 += src1Stride;
705  src2 += src2Stride;
706  }
707 }
708 
709 static inline void vu9_to_vu12_c(const uint8_t *src1, const uint8_t *src2,
710  uint8_t *dst1, uint8_t *dst2,
711  int width, int height,
712  int srcStride1, int srcStride2,
713  int dstStride1, int dstStride2)
714 {
715  int x, y;
716  int w = width / 2;
717  int h = height / 2;
718 
719  for (y = 0; y < h; y++) {
720  const uint8_t *s1 = src1 + srcStride1 * (y >> 1);
721  uint8_t *d = dst1 + dstStride1 * y;
722  for (x = 0; x < w; x++)
723  d[2 * x] = d[2 * x + 1] = s1[x];
724  }
725  for (y = 0; y < h; y++) {
726  const uint8_t *s2 = src2 + srcStride2 * (y >> 1);
727  uint8_t *d = dst2 + dstStride2 * y;
728  for (x = 0; x < w; x++)
729  d[2 * x] = d[2 * x + 1] = s2[x];
730  }
731 }
732 
733 static inline void yvu9_to_yuy2_c(const uint8_t *src1, const uint8_t *src2,
734  const uint8_t *src3, uint8_t *dst,
735  int width, int height,
736  int srcStride1, int srcStride2,
737  int srcStride3, int dstStride)
738 {
739  int x, y;
740  int w = width / 2;
741  int h = height;
742 
743  for (y = 0; y < h; y++) {
744  const uint8_t *yp = src1 + srcStride1 * y;
745  const uint8_t *up = src2 + srcStride2 * (y >> 2);
746  const uint8_t *vp = src3 + srcStride3 * (y >> 2);
747  uint8_t *d = dst + dstStride * y;
748  for (x = 0; x < w; x++) {
749  const int x2 = x << 2;
750  d[8 * x + 0] = yp[x2];
751  d[8 * x + 1] = up[x];
752  d[8 * x + 2] = yp[x2 + 1];
753  d[8 * x + 3] = vp[x];
754  d[8 * x + 4] = yp[x2 + 2];
755  d[8 * x + 5] = up[x];
756  d[8 * x + 6] = yp[x2 + 3];
757  d[8 * x + 7] = vp[x];
758  }
759  }
760 }
761 
762 static void extract_even_c(const uint8_t *src, uint8_t *dst, int count)
763 {
764  dst += count;
765  src += count * 2;
766  count = -count;
767  while (count < 0) {
768  dst[count] = src[2 * count];
769  count++;
770  }
771 }
772 
773 static void extract_even2_c(const uint8_t *src, uint8_t *dst0, uint8_t *dst1,
774  int count)
775 {
776  dst0 += count;
777  dst1 += count;
778  src += count * 4;
779  count = -count;
780  while (count < 0) {
781  dst0[count] = src[4 * count + 0];
782  dst1[count] = src[4 * count + 2];
783  count++;
784  }
785 }
786 
787 static void extract_even2avg_c(const uint8_t *src0, const uint8_t *src1,
788  uint8_t *dst0, uint8_t *dst1, int count)
789 {
790  dst0 += count;
791  dst1 += count;
792  src0 += count * 4;
793  src1 += count * 4;
794  count = -count;
795  while (count < 0) {
796  dst0[count] = (src0[4 * count + 0] + src1[4 * count + 0]) >> 1;
797  dst1[count] = (src0[4 * count + 2] + src1[4 * count + 2]) >> 1;
798  count++;
799  }
800 }
801 
802 static void extract_odd2_c(const uint8_t *src, uint8_t *dst0, uint8_t *dst1,
803  int count)
804 {
805  dst0 += count;
806  dst1 += count;
807  src += count * 4;
808  count = -count;
809  src++;
810  while (count < 0) {
811  dst0[count] = src[4 * count + 0];
812  dst1[count] = src[4 * count + 2];
813  count++;
814  }
815 }
816 
817 static void extract_odd2avg_c(const uint8_t *src0, const uint8_t *src1,
818  uint8_t *dst0, uint8_t *dst1, int count)
819 {
820  dst0 += count;
821  dst1 += count;
822  src0 += count * 4;
823  src1 += count * 4;
824  count = -count;
825  src0++;
826  src1++;
827  while (count < 0) {
828  dst0[count] = (src0[4 * count + 0] + src1[4 * count + 0]) >> 1;
829  dst1[count] = (src0[4 * count + 2] + src1[4 * count + 2]) >> 1;
830  count++;
831  }
832 }
833 
834 static void yuyvtoyuv420_c(uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
835  const uint8_t *src, int width, int height,
836  int lumStride, int chromStride, int srcStride)
837 {
838  int y;
839  const int chromWidth = -((-width) >> 1);
840 
841  for (y = 0; y < height; y++) {
842  extract_even_c(src, ydst, width);
843  if (y & 1) {
844  extract_odd2avg_c(src - srcStride, src, udst, vdst, chromWidth);
845  udst += chromStride;
846  vdst += chromStride;
847  }
848 
849  src += srcStride;
850  ydst += lumStride;
851  }
852 }
853 
854 static void yuyvtoyuv422_c(uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
855  const uint8_t *src, int width, int height,
856  int lumStride, int chromStride, int srcStride)
857 {
858  int y;
859  const int chromWidth = -((-width) >> 1);
860 
861  for (y = 0; y < height; y++) {
862  extract_even_c(src, ydst, width);
863  extract_odd2_c(src, udst, vdst, chromWidth);
864 
865  src += srcStride;
866  ydst += lumStride;
867  udst += chromStride;
868  vdst += chromStride;
869  }
870 }
871 
872 static void uyvytoyuv420_c(uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
873  const uint8_t *src, int width, int height,
874  int lumStride, int chromStride, int srcStride)
875 {
876  int y;
877  const int chromWidth = -((-width) >> 1);
878 
879  for (y = 0; y < height; y++) {
880  extract_even_c(src + 1, ydst, width);
881  if (y & 1) {
882  extract_even2avg_c(src - srcStride, src, udst, vdst, chromWidth);
883  udst += chromStride;
884  vdst += chromStride;
885  }
886 
887  src += srcStride;
888  ydst += lumStride;
889  }
890 }
891 
892 static void uyvytoyuv422_c(uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
893  const uint8_t *src, int width, int height,
894  int lumStride, int chromStride, int srcStride)
895 {
896  int y;
897  const int chromWidth = -((-width) >> 1);
898 
899  for (y = 0; y < height; y++) {
900  extract_even_c(src + 1, ydst, width);
901  extract_even2_c(src, udst, vdst, chromWidth);
902 
903  src += srcStride;
904  ydst += lumStride;
905  udst += chromStride;
906  vdst += chromStride;
907  }
908 }
909 
910 static inline void rgb2rgb_init_c(void)
911 {
940 
945 }