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swscale_unscaled.c
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1 /*
2  * Copyright (C) 2001-2011 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include <inttypes.h>
22 #include <string.h>
23 #include <math.h>
24 #include <stdio.h>
25 #include "config.h"
26 #include "swscale.h"
27 #include "swscale_internal.h"
28 #include "rgb2rgb.h"
29 #include "libavutil/intreadwrite.h"
30 #include "libavutil/cpu.h"
31 #include "libavutil/avutil.h"
32 #include "libavutil/mathematics.h"
33 #include "libavutil/bswap.h"
34 #include "libavutil/pixdesc.h"
35 #include "libavutil/avassert.h"
36 
37 DECLARE_ALIGNED(8, const uint8_t, dithers)[8][8][8]={
38 {
39  { 0, 1, 0, 1, 0, 1, 0, 1,},
40  { 1, 0, 1, 0, 1, 0, 1, 0,},
41  { 0, 1, 0, 1, 0, 1, 0, 1,},
42  { 1, 0, 1, 0, 1, 0, 1, 0,},
43  { 0, 1, 0, 1, 0, 1, 0, 1,},
44  { 1, 0, 1, 0, 1, 0, 1, 0,},
45  { 0, 1, 0, 1, 0, 1, 0, 1,},
46  { 1, 0, 1, 0, 1, 0, 1, 0,},
47 },{
48  { 1, 2, 1, 2, 1, 2, 1, 2,},
49  { 3, 0, 3, 0, 3, 0, 3, 0,},
50  { 1, 2, 1, 2, 1, 2, 1, 2,},
51  { 3, 0, 3, 0, 3, 0, 3, 0,},
52  { 1, 2, 1, 2, 1, 2, 1, 2,},
53  { 3, 0, 3, 0, 3, 0, 3, 0,},
54  { 1, 2, 1, 2, 1, 2, 1, 2,},
55  { 3, 0, 3, 0, 3, 0, 3, 0,},
56 },{
57  { 2, 4, 3, 5, 2, 4, 3, 5,},
58  { 6, 0, 7, 1, 6, 0, 7, 1,},
59  { 3, 5, 2, 4, 3, 5, 2, 4,},
60  { 7, 1, 6, 0, 7, 1, 6, 0,},
61  { 2, 4, 3, 5, 2, 4, 3, 5,},
62  { 6, 0, 7, 1, 6, 0, 7, 1,},
63  { 3, 5, 2, 4, 3, 5, 2, 4,},
64  { 7, 1, 6, 0, 7, 1, 6, 0,},
65 },{
66  { 4, 8, 7, 11, 4, 8, 7, 11,},
67  { 12, 0, 15, 3, 12, 0, 15, 3,},
68  { 6, 10, 5, 9, 6, 10, 5, 9,},
69  { 14, 2, 13, 1, 14, 2, 13, 1,},
70  { 4, 8, 7, 11, 4, 8, 7, 11,},
71  { 12, 0, 15, 3, 12, 0, 15, 3,},
72  { 6, 10, 5, 9, 6, 10, 5, 9,},
73  { 14, 2, 13, 1, 14, 2, 13, 1,},
74 },{
75  { 9, 17, 15, 23, 8, 16, 14, 22,},
76  { 25, 1, 31, 7, 24, 0, 30, 6,},
77  { 13, 21, 11, 19, 12, 20, 10, 18,},
78  { 29, 5, 27, 3, 28, 4, 26, 2,},
79  { 8, 16, 14, 22, 9, 17, 15, 23,},
80  { 24, 0, 30, 6, 25, 1, 31, 7,},
81  { 12, 20, 10, 18, 13, 21, 11, 19,},
82  { 28, 4, 26, 2, 29, 5, 27, 3,},
83 },{
84  { 18, 34, 30, 46, 17, 33, 29, 45,},
85  { 50, 2, 62, 14, 49, 1, 61, 13,},
86  { 26, 42, 22, 38, 25, 41, 21, 37,},
87  { 58, 10, 54, 6, 57, 9, 53, 5,},
88  { 16, 32, 28, 44, 19, 35, 31, 47,},
89  { 48, 0, 60, 12, 51, 3, 63, 15,},
90  { 24, 40, 20, 36, 27, 43, 23, 39,},
91  { 56, 8, 52, 4, 59, 11, 55, 7,},
92 },{
93  { 18, 34, 30, 46, 17, 33, 29, 45,},
94  { 50, 2, 62, 14, 49, 1, 61, 13,},
95  { 26, 42, 22, 38, 25, 41, 21, 37,},
96  { 58, 10, 54, 6, 57, 9, 53, 5,},
97  { 16, 32, 28, 44, 19, 35, 31, 47,},
98  { 48, 0, 60, 12, 51, 3, 63, 15,},
99  { 24, 40, 20, 36, 27, 43, 23, 39,},
100  { 56, 8, 52, 4, 59, 11, 55, 7,},
101 },{
102  { 36, 68, 60, 92, 34, 66, 58, 90,},
103  { 100, 4,124, 28, 98, 2,122, 26,},
104  { 52, 84, 44, 76, 50, 82, 42, 74,},
105  { 116, 20,108, 12,114, 18,106, 10,},
106  { 32, 64, 56, 88, 38, 70, 62, 94,},
107  { 96, 0,120, 24,102, 6,126, 30,},
108  { 48, 80, 40, 72, 54, 86, 46, 78,},
109  { 112, 16,104, 8,118, 22,110, 14,},
110 }};
111 
112 const uint16_t dither_scale[15][16]={
113 { 2, 3, 3, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,},
114 { 2, 3, 7, 7, 13, 13, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,},
115 { 3, 3, 4, 15, 15, 29, 57, 57, 57, 113, 113, 113, 113, 113, 113, 113,},
116 { 3, 4, 4, 5, 31, 31, 61, 121, 241, 241, 241, 241, 481, 481, 481, 481,},
117 { 3, 4, 5, 5, 6, 63, 63, 125, 249, 497, 993, 993, 993, 993, 993, 1985,},
118 { 3, 5, 6, 6, 6, 7, 127, 127, 253, 505, 1009, 2017, 4033, 4033, 4033, 4033,},
119 { 3, 5, 6, 7, 7, 7, 8, 255, 255, 509, 1017, 2033, 4065, 8129,16257,16257,},
120 { 3, 5, 6, 8, 8, 8, 8, 9, 511, 511, 1021, 2041, 4081, 8161,16321,32641,},
121 { 3, 5, 7, 8, 9, 9, 9, 9, 10, 1023, 1023, 2045, 4089, 8177,16353,32705,},
122 { 3, 5, 7, 8, 10, 10, 10, 10, 10, 11, 2047, 2047, 4093, 8185,16369,32737,},
123 { 3, 5, 7, 8, 10, 11, 11, 11, 11, 11, 12, 4095, 4095, 8189,16377,32753,},
124 { 3, 5, 7, 9, 10, 12, 12, 12, 12, 12, 12, 13, 8191, 8191,16381,32761,},
125 { 3, 5, 7, 9, 10, 12, 13, 13, 13, 13, 13, 13, 14,16383,16383,32765,},
126 { 3, 5, 7, 9, 10, 12, 14, 14, 14, 14, 14, 14, 14, 15,32767,32767,},
127 { 3, 5, 7, 9, 11, 12, 14, 15, 15, 15, 15, 15, 15, 15, 16,65535,},
128 };
129 
130 
131 static void fillPlane(uint8_t *plane, int stride, int width, int height, int y,
132  uint8_t val)
133 {
134  int i;
135  uint8_t *ptr = plane + stride * y;
136  for (i = 0; i < height; i++) {
137  memset(ptr, val, width);
138  ptr += stride;
139  }
140 }
141 
142 static void copyPlane(const uint8_t *src, int srcStride,
143  int srcSliceY, int srcSliceH, int width,
144  uint8_t *dst, int dstStride)
145 {
146  dst += dstStride * srcSliceY;
147  if (dstStride == srcStride && srcStride > 0) {
148  memcpy(dst, src, srcSliceH * dstStride);
149  } else {
150  int i;
151  for (i = 0; i < srcSliceH; i++) {
152  memcpy(dst, src, width);
153  src += srcStride;
154  dst += dstStride;
155  }
156  }
157 }
158 
159 static int planarToNv12Wrapper(SwsContext *c, const uint8_t *src[],
160  int srcStride[], int srcSliceY,
161  int srcSliceH, uint8_t *dstParam[],
162  int dstStride[])
163 {
164  uint8_t *dst = dstParam[1] + dstStride[1] * srcSliceY / 2;
165 
166  copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
167  dstParam[0], dstStride[0]);
168 
169  if (c->dstFormat == AV_PIX_FMT_NV12)
170  interleaveBytes(src[1], src[2], dst, c->srcW / 2, srcSliceH / 2,
171  srcStride[1], srcStride[2], dstStride[0]);
172  else
173  interleaveBytes(src[2], src[1], dst, c->srcW / 2, srcSliceH / 2,
174  srcStride[2], srcStride[1], dstStride[0]);
175 
176  return srcSliceH;
177 }
178 
179 static int planarToYuy2Wrapper(SwsContext *c, const uint8_t *src[],
180  int srcStride[], int srcSliceY, int srcSliceH,
181  uint8_t *dstParam[], int dstStride[])
182 {
183  uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
184 
185  yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
186  srcStride[1], dstStride[0]);
187 
188  return srcSliceH;
189 }
190 
191 static int planarToUyvyWrapper(SwsContext *c, const uint8_t *src[],
192  int srcStride[], int srcSliceY, int srcSliceH,
193  uint8_t *dstParam[], int dstStride[])
194 {
195  uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
196 
197  yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
198  srcStride[1], dstStride[0]);
199 
200  return srcSliceH;
201 }
202 
203 static int yuv422pToYuy2Wrapper(SwsContext *c, const uint8_t *src[],
204  int srcStride[], int srcSliceY, int srcSliceH,
205  uint8_t *dstParam[], int dstStride[])
206 {
207  uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
208 
209  yuv422ptoyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
210  srcStride[1], dstStride[0]);
211 
212  return srcSliceH;
213 }
214 
215 static int yuv422pToUyvyWrapper(SwsContext *c, const uint8_t *src[],
216  int srcStride[], int srcSliceY, int srcSliceH,
217  uint8_t *dstParam[], int dstStride[])
218 {
219  uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
220 
221  yuv422ptouyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
222  srcStride[1], dstStride[0]);
223 
224  return srcSliceH;
225 }
226 
227 static int yuyvToYuv420Wrapper(SwsContext *c, const uint8_t *src[],
228  int srcStride[], int srcSliceY, int srcSliceH,
229  uint8_t *dstParam[], int dstStride[])
230 {
231  uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
232  uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY / 2;
233  uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY / 2;
234 
235  yuyvtoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
236  dstStride[1], srcStride[0]);
237 
238  if (dstParam[3])
239  fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
240 
241  return srcSliceH;
242 }
243 
244 static int yuyvToYuv422Wrapper(SwsContext *c, const uint8_t *src[],
245  int srcStride[], int srcSliceY, int srcSliceH,
246  uint8_t *dstParam[], int dstStride[])
247 {
248  uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
249  uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY;
250  uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY;
251 
252  yuyvtoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
253  dstStride[1], srcStride[0]);
254 
255  return srcSliceH;
256 }
257 
258 static int uyvyToYuv420Wrapper(SwsContext *c, const uint8_t *src[],
259  int srcStride[], int srcSliceY, int srcSliceH,
260  uint8_t *dstParam[], int dstStride[])
261 {
262  uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
263  uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY / 2;
264  uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY / 2;
265 
266  uyvytoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
267  dstStride[1], srcStride[0]);
268 
269  if (dstParam[3])
270  fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
271 
272  return srcSliceH;
273 }
274 
275 static int uyvyToYuv422Wrapper(SwsContext *c, const uint8_t *src[],
276  int srcStride[], int srcSliceY, int srcSliceH,
277  uint8_t *dstParam[], int dstStride[])
278 {
279  uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
280  uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY;
281  uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY;
282 
283  uyvytoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
284  dstStride[1], srcStride[0]);
285 
286  return srcSliceH;
287 }
288 
289 static void gray8aToPacked32(const uint8_t *src, uint8_t *dst, int num_pixels,
290  const uint8_t *palette)
291 {
292  int i;
293  for (i = 0; i < num_pixels; i++)
294  ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i << 1]] | (src[(i << 1) + 1] << 24);
295 }
296 
297 static void gray8aToPacked32_1(const uint8_t *src, uint8_t *dst, int num_pixels,
298  const uint8_t *palette)
299 {
300  int i;
301 
302  for (i = 0; i < num_pixels; i++)
303  ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i << 1]] | src[(i << 1) + 1];
304 }
305 
306 static void gray8aToPacked24(const uint8_t *src, uint8_t *dst, int num_pixels,
307  const uint8_t *palette)
308 {
309  int i;
310 
311  for (i = 0; i < num_pixels; i++) {
312  //FIXME slow?
313  dst[0] = palette[src[i << 1] * 4 + 0];
314  dst[1] = palette[src[i << 1] * 4 + 1];
315  dst[2] = palette[src[i << 1] * 4 + 2];
316  dst += 3;
317  }
318 }
319 
320 static int packed_16bpc_bswap(SwsContext *c, const uint8_t *src[],
321  int srcStride[], int srcSliceY, int srcSliceH,
322  uint8_t *dst[], int dstStride[])
323 {
324  int i, j;
325  int srcstr = srcStride[0] >> 1;
326  int dststr = dstStride[0] >> 1;
327  uint16_t *dstPtr = (uint16_t *) dst[0];
328  const uint16_t *srcPtr = (const uint16_t *) src[0];
329  int min_stride = FFMIN(srcstr, dststr);
330 
331  for (i = 0; i < srcSliceH; i++) {
332  for (j = 0; j < min_stride; j++) {
333  dstPtr[j] = av_bswap16(srcPtr[j]);
334  }
335  srcPtr += srcstr;
336  dstPtr += dststr;
337  }
338 
339  return srcSliceH;
340 }
341 
342 static int palToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
343  int srcSliceY, int srcSliceH, uint8_t *dst[],
344  int dstStride[])
345 {
346  const enum AVPixelFormat srcFormat = c->srcFormat;
347  const enum AVPixelFormat dstFormat = c->dstFormat;
348  void (*conv)(const uint8_t *src, uint8_t *dst, int num_pixels,
349  const uint8_t *palette) = NULL;
350  int i;
351  uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
352  const uint8_t *srcPtr = src[0];
353 
354  if (srcFormat == AV_PIX_FMT_GRAY8A) {
355  switch (dstFormat) {
356  case AV_PIX_FMT_RGB32 : conv = gray8aToPacked32; break;
357  case AV_PIX_FMT_BGR32 : conv = gray8aToPacked32; break;
358  case AV_PIX_FMT_BGR32_1: conv = gray8aToPacked32_1; break;
359  case AV_PIX_FMT_RGB32_1: conv = gray8aToPacked32_1; break;
360  case AV_PIX_FMT_RGB24 : conv = gray8aToPacked24; break;
361  case AV_PIX_FMT_BGR24 : conv = gray8aToPacked24; break;
362  }
363  } else if (usePal(srcFormat)) {
364  switch (dstFormat) {
365  case AV_PIX_FMT_RGB32 : conv = sws_convertPalette8ToPacked32; break;
366  case AV_PIX_FMT_BGR32 : conv = sws_convertPalette8ToPacked32; break;
367  case AV_PIX_FMT_BGR32_1: conv = sws_convertPalette8ToPacked32; break;
368  case AV_PIX_FMT_RGB32_1: conv = sws_convertPalette8ToPacked32; break;
369  case AV_PIX_FMT_RGB24 : conv = sws_convertPalette8ToPacked24; break;
370  case AV_PIX_FMT_BGR24 : conv = sws_convertPalette8ToPacked24; break;
371  }
372  }
373 
374  if (!conv)
375  av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
376  av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
377  else {
378  for (i = 0; i < srcSliceH; i++) {
379  conv(srcPtr, dstPtr, c->srcW, (uint8_t *) c->pal_rgb);
380  srcPtr += srcStride[0];
381  dstPtr += dstStride[0];
382  }
383  }
384 
385  return srcSliceH;
386 }
387 
388 static void gbr24ptopacked24(const uint8_t *src[], int srcStride[],
389  uint8_t *dst, int dstStride, int srcSliceH,
390  int width)
391 {
392  int x, h, i;
393  for (h = 0; h < srcSliceH; h++) {
394  uint8_t *dest = dst + dstStride * h;
395  for (x = 0; x < width; x++) {
396  *dest++ = src[0][x];
397  *dest++ = src[1][x];
398  *dest++ = src[2][x];
399  }
400 
401  for (i = 0; i < 3; i++)
402  src[i] += srcStride[i];
403  }
404 }
405 
406 static void gbr24ptopacked32(const uint8_t *src[], int srcStride[],
407  uint8_t *dst, int dstStride, int srcSliceH,
408  int alpha_first, int width)
409 {
410  int x, h, i;
411  for (h = 0; h < srcSliceH; h++) {
412  uint8_t *dest = dst + dstStride * h;
413 
414  if (alpha_first) {
415  for (x = 0; x < width; x++) {
416  *dest++ = 0xff;
417  *dest++ = src[0][x];
418  *dest++ = src[1][x];
419  *dest++ = src[2][x];
420  }
421  } else {
422  for (x = 0; x < width; x++) {
423  *dest++ = src[0][x];
424  *dest++ = src[1][x];
425  *dest++ = src[2][x];
426  *dest++ = 0xff;
427  }
428  }
429 
430  for (i = 0; i < 3; i++)
431  src[i] += srcStride[i];
432  }
433 }
434 
435 static int planarRgbToRgbWrapper(SwsContext *c, const uint8_t *src[],
436  int srcStride[], int srcSliceY, int srcSliceH,
437  uint8_t *dst[], int dstStride[])
438 {
439  int alpha_first = 0;
440  const uint8_t *src102[] = { src[1], src[0], src[2] };
441  const uint8_t *src201[] = { src[2], src[0], src[1] };
442  int stride102[] = { srcStride[1], srcStride[0], srcStride[2] };
443  int stride201[] = { srcStride[2], srcStride[0], srcStride[1] };
444 
445  if (c->srcFormat != AV_PIX_FMT_GBRP) {
446  av_log(c, AV_LOG_ERROR, "unsupported planar RGB conversion %s -> %s\n",
447  av_get_pix_fmt_name(c->srcFormat),
448  av_get_pix_fmt_name(c->dstFormat));
449  return srcSliceH;
450  }
451 
452  switch (c->dstFormat) {
453  case AV_PIX_FMT_BGR24:
454  gbr24ptopacked24(src102, stride102,
455  dst[0] + srcSliceY * dstStride[0], dstStride[0],
456  srcSliceH, c->srcW);
457  break;
458 
459  case AV_PIX_FMT_RGB24:
460  gbr24ptopacked24(src201, stride201,
461  dst[0] + srcSliceY * dstStride[0], dstStride[0],
462  srcSliceH, c->srcW);
463  break;
464 
465  case AV_PIX_FMT_ARGB:
466  alpha_first = 1;
467  case AV_PIX_FMT_RGBA:
468  gbr24ptopacked32(src201, stride201,
469  dst[0] + srcSliceY * dstStride[0], dstStride[0],
470  srcSliceH, alpha_first, c->srcW);
471  break;
472 
473  case AV_PIX_FMT_ABGR:
474  alpha_first = 1;
475  case AV_PIX_FMT_BGRA:
476  gbr24ptopacked32(src102, stride102,
477  dst[0] + srcSliceY * dstStride[0], dstStride[0],
478  srcSliceH, alpha_first, c->srcW);
479  break;
480 
481  default:
482  av_log(c, AV_LOG_ERROR,
483  "unsupported planar RGB conversion %s -> %s\n",
484  av_get_pix_fmt_name(c->srcFormat),
485  av_get_pix_fmt_name(c->dstFormat));
486  }
487 
488  return srcSliceH;
489 }
490 
491 #define isRGBA32(x) ( \
492  (x) == AV_PIX_FMT_ARGB \
493  || (x) == AV_PIX_FMT_RGBA \
494  || (x) == AV_PIX_FMT_BGRA \
495  || (x) == AV_PIX_FMT_ABGR \
496  )
497 
498 #define isRGBA64(x) ( \
499  (x) == AV_PIX_FMT_RGBA64LE \
500  || (x) == AV_PIX_FMT_RGBA64BE \
501  || (x) == AV_PIX_FMT_BGRA64LE \
502  || (x) == AV_PIX_FMT_BGRA64BE \
503  )
504 
505 #define isRGB48(x) ( \
506  (x) == AV_PIX_FMT_RGB48LE \
507  || (x) == AV_PIX_FMT_RGB48BE \
508  || (x) == AV_PIX_FMT_BGR48LE \
509  || (x) == AV_PIX_FMT_BGR48BE \
510  )
511 
512 /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
513 typedef void (* rgbConvFn) (const uint8_t *, uint8_t *, int);
514 static rgbConvFn findRgbConvFn(SwsContext *c)
515 {
516  const enum AVPixelFormat srcFormat = c->srcFormat;
517  const enum AVPixelFormat dstFormat = c->dstFormat;
518  const int srcId = c->srcFormatBpp;
519  const int dstId = c->dstFormatBpp;
520  rgbConvFn conv = NULL;
521 
522 #define IS_NOT_NE(bpp, desc) \
523  (((bpp + 7) >> 3) == 2 && \
524  (!(desc->flags & PIX_FMT_BE) != !HAVE_BIGENDIAN))
525 
526 #define CONV_IS(src, dst) (srcFormat == AV_PIX_FMT_##src && dstFormat == AV_PIX_FMT_##dst)
527 
528  if (isRGBA32(srcFormat) && isRGBA32(dstFormat)) {
529  if ( CONV_IS(ABGR, RGBA)
530  || CONV_IS(ARGB, BGRA)
531  || CONV_IS(BGRA, ARGB)
532  || CONV_IS(RGBA, ABGR)) conv = shuffle_bytes_3210;
533  else if (CONV_IS(ABGR, ARGB)
534  || CONV_IS(ARGB, ABGR)) conv = shuffle_bytes_0321;
535  else if (CONV_IS(ABGR, BGRA)
536  || CONV_IS(ARGB, RGBA)) conv = shuffle_bytes_1230;
537  else if (CONV_IS(BGRA, RGBA)
538  || CONV_IS(RGBA, BGRA)) conv = shuffle_bytes_2103;
539  else if (CONV_IS(BGRA, ABGR)
540  || CONV_IS(RGBA, ARGB)) conv = shuffle_bytes_3012;
541  } else if (isRGB48(srcFormat) && isRGB48(dstFormat)) {
542  if (CONV_IS(RGB48LE, BGR48LE)
543  || CONV_IS(BGR48LE, RGB48LE)
544  || CONV_IS(RGB48BE, BGR48BE)
545  || CONV_IS(BGR48BE, RGB48BE)) conv = rgb48tobgr48_nobswap;
546  else if (CONV_IS(RGB48LE, BGR48BE)
547  || CONV_IS(BGR48LE, RGB48BE)
548  || CONV_IS(RGB48BE, BGR48LE)
549  || CONV_IS(BGR48BE, RGB48LE)) conv = rgb48tobgr48_bswap;
550  } else if (isRGBA64(srcFormat) && isRGB48(dstFormat)) {
551  if (CONV_IS(RGBA64LE, BGR48LE)
552  || CONV_IS(BGRA64LE, RGB48LE)
553  || CONV_IS(RGBA64BE, BGR48BE)
554  || CONV_IS(BGRA64BE, RGB48BE)) conv = rgb64tobgr48_nobswap;
555  else if (CONV_IS(RGBA64LE, BGR48BE)
556  || CONV_IS(BGRA64LE, RGB48BE)
557  || CONV_IS(RGBA64BE, BGR48LE)
558  || CONV_IS(BGRA64BE, RGB48LE)) conv = rgb64tobgr48_bswap;
559  else if (CONV_IS(RGBA64LE, RGB48LE)
560  || CONV_IS(BGRA64LE, BGR48LE)
561  || CONV_IS(RGBA64BE, RGB48BE)
562  || CONV_IS(BGRA64BE, BGR48BE)) conv = rgb64to48_nobswap;
563  else if (CONV_IS(RGBA64LE, RGB48BE)
564  || CONV_IS(BGRA64LE, BGR48BE)
565  || CONV_IS(RGBA64BE, RGB48LE)
566  || CONV_IS(BGRA64BE, BGR48LE)) conv = rgb64to48_bswap;
567  } else
568  /* BGR -> BGR */
569  if ((isBGRinInt(srcFormat) && isBGRinInt(dstFormat)) ||
570  (isRGBinInt(srcFormat) && isRGBinInt(dstFormat))) {
571  switch (srcId | (dstId << 16)) {
572  case 0x000F000C: conv = rgb12to15; break;
573  case 0x000F0010: conv = rgb16to15; break;
574  case 0x000F0018: conv = rgb24to15; break;
575  case 0x000F0020: conv = rgb32to15; break;
576  case 0x0010000F: conv = rgb15to16; break;
577  case 0x00100018: conv = rgb24to16; break;
578  case 0x00100020: conv = rgb32to16; break;
579  case 0x0018000F: conv = rgb15to24; break;
580  case 0x00180010: conv = rgb16to24; break;
581  case 0x00180020: conv = rgb32to24; break;
582  case 0x0020000F: conv = rgb15to32; break;
583  case 0x00200010: conv = rgb16to32; break;
584  case 0x00200018: conv = rgb24to32; break;
585  }
586  } else if ((isBGRinInt(srcFormat) && isRGBinInt(dstFormat)) ||
587  (isRGBinInt(srcFormat) && isBGRinInt(dstFormat))) {
588  switch (srcId | (dstId << 16)) {
589  case 0x000C000C: conv = rgb12tobgr12; break;
590  case 0x000F000F: conv = rgb15tobgr15; break;
591  case 0x000F0010: conv = rgb16tobgr15; break;
592  case 0x000F0018: conv = rgb24tobgr15; break;
593  case 0x000F0020: conv = rgb32tobgr15; break;
594  case 0x0010000F: conv = rgb15tobgr16; break;
595  case 0x00100010: conv = rgb16tobgr16; break;
596  case 0x00100018: conv = rgb24tobgr16; break;
597  case 0x00100020: conv = rgb32tobgr16; break;
598  case 0x0018000F: conv = rgb15tobgr24; break;
599  case 0x00180010: conv = rgb16tobgr24; break;
600  case 0x00180018: conv = rgb24tobgr24; break;
601  case 0x00180020: conv = rgb32tobgr24; break;
602  case 0x0020000F: conv = rgb15tobgr32; break;
603  case 0x00200010: conv = rgb16tobgr32; break;
604  case 0x00200018: conv = rgb24tobgr32; break;
605  }
606  }
607 
608  if ((dstFormat == AV_PIX_FMT_RGB32_1 || dstFormat == AV_PIX_FMT_BGR32_1) && !isRGBA32(srcFormat) && ALT32_CORR<0)
609  return NULL;
610 
611  return conv;
612 }
613 
614 /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
615 static int rgbToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
616  int srcSliceY, int srcSliceH, uint8_t *dst[],
617  int dstStride[])
618 
619 {
620  const enum AVPixelFormat srcFormat = c->srcFormat;
621  const enum AVPixelFormat dstFormat = c->dstFormat;
622  const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat);
623  const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat);
624  const int srcBpp = (c->srcFormatBpp + 7) >> 3;
625  const int dstBpp = (c->dstFormatBpp + 7) >> 3;
626  rgbConvFn conv = findRgbConvFn(c);
627 
628  if (!conv) {
629  av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
630  av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
631  } else {
632  const uint8_t *srcPtr = src[0];
633  uint8_t *dstPtr = dst[0];
634  int src_bswap = IS_NOT_NE(c->srcFormatBpp, desc_src);
635  int dst_bswap = IS_NOT_NE(c->dstFormatBpp, desc_dst);
636 
637  if ((srcFormat == AV_PIX_FMT_RGB32_1 || srcFormat == AV_PIX_FMT_BGR32_1) &&
638  !isRGBA32(dstFormat))
639  srcPtr += ALT32_CORR;
640 
641  if ((dstFormat == AV_PIX_FMT_RGB32_1 || dstFormat == AV_PIX_FMT_BGR32_1) &&
642  !isRGBA32(srcFormat))
643  dstPtr += ALT32_CORR;
644 
645  if (dstStride[0] * srcBpp == srcStride[0] * dstBpp && srcStride[0] > 0 &&
646  !(srcStride[0] % srcBpp) && !dst_bswap && !src_bswap)
647  conv(srcPtr, dstPtr + dstStride[0] * srcSliceY,
648  srcSliceH * srcStride[0]);
649  else {
650  int i, j;
651  dstPtr += dstStride[0] * srcSliceY;
652 
653  for (i = 0; i < srcSliceH; i++) {
654  if(src_bswap) {
655  for(j=0; j<c->srcW; j++)
656  ((uint16_t*)c->formatConvBuffer)[j] = av_bswap16(((uint16_t*)srcPtr)[j]);
657  conv(c->formatConvBuffer, dstPtr, c->srcW * srcBpp);
658  }else
659  conv(srcPtr, dstPtr, c->srcW * srcBpp);
660  if(dst_bswap)
661  for(j=0; j<c->srcW; j++)
662  ((uint16_t*)dstPtr)[j] = av_bswap16(((uint16_t*)dstPtr)[j]);
663  srcPtr += srcStride[0];
664  dstPtr += dstStride[0];
665  }
666  }
667  }
668  return srcSliceH;
669 }
670 
671 static int bgr24ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
672  int srcStride[], int srcSliceY, int srcSliceH,
673  uint8_t *dst[], int dstStride[])
674 {
675  rgb24toyv12(
676  src[0],
677  dst[0] + srcSliceY * dstStride[0],
678  dst[1] + (srcSliceY >> 1) * dstStride[1],
679  dst[2] + (srcSliceY >> 1) * dstStride[2],
680  c->srcW, srcSliceH,
681  dstStride[0], dstStride[1], srcStride[0]);
682  if (dst[3])
683  fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
684  return srcSliceH;
685 }
686 
687 static int yvu9ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
688  int srcStride[], int srcSliceY, int srcSliceH,
689  uint8_t *dst[], int dstStride[])
690 {
691  copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
692  dst[0], dstStride[0]);
693 
694  planar2x(src[1], dst[1] + dstStride[1] * (srcSliceY >> 1), c->chrSrcW,
695  srcSliceH >> 2, srcStride[1], dstStride[1]);
696  planar2x(src[2], dst[2] + dstStride[2] * (srcSliceY >> 1), c->chrSrcW,
697  srcSliceH >> 2, srcStride[2], dstStride[2]);
698  if (dst[3])
699  fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
700  return srcSliceH;
701 }
702 
703 /* unscaled copy like stuff (assumes nearly identical formats) */
704 static int packedCopyWrapper(SwsContext *c, const uint8_t *src[],
705  int srcStride[], int srcSliceY, int srcSliceH,
706  uint8_t *dst[], int dstStride[])
707 {
708  if (dstStride[0] == srcStride[0] && srcStride[0] > 0)
709  memcpy(dst[0] + dstStride[0] * srcSliceY, src[0], srcSliceH * dstStride[0]);
710  else {
711  int i;
712  const uint8_t *srcPtr = src[0];
713  uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
714  int length = 0;
715 
716  /* universal length finder */
717  while (length + c->srcW <= FFABS(dstStride[0]) &&
718  length + c->srcW <= FFABS(srcStride[0]))
719  length += c->srcW;
720  av_assert1(length != 0);
721 
722  for (i = 0; i < srcSliceH; i++) {
723  memcpy(dstPtr, srcPtr, length);
724  srcPtr += srcStride[0];
725  dstPtr += dstStride[0];
726  }
727  }
728  return srcSliceH;
729 }
730 
731 #define DITHER_COPY(dst, dstStride, src, srcStride, bswap, dbswap)\
732  uint16_t scale= dither_scale[dst_depth-1][src_depth-1];\
733  int shift= src_depth-dst_depth + dither_scale[src_depth-2][dst_depth-1];\
734  for (i = 0; i < height; i++) {\
735  const uint8_t *dither= dithers[src_depth-9][i&7];\
736  for (j = 0; j < length-7; j+=8){\
737  dst[j+0] = dbswap((bswap(src[j+0]) + dither[0])*scale>>shift);\
738  dst[j+1] = dbswap((bswap(src[j+1]) + dither[1])*scale>>shift);\
739  dst[j+2] = dbswap((bswap(src[j+2]) + dither[2])*scale>>shift);\
740  dst[j+3] = dbswap((bswap(src[j+3]) + dither[3])*scale>>shift);\
741  dst[j+4] = dbswap((bswap(src[j+4]) + dither[4])*scale>>shift);\
742  dst[j+5] = dbswap((bswap(src[j+5]) + dither[5])*scale>>shift);\
743  dst[j+6] = dbswap((bswap(src[j+6]) + dither[6])*scale>>shift);\
744  dst[j+7] = dbswap((bswap(src[j+7]) + dither[7])*scale>>shift);\
745  }\
746  for (; j < length; j++)\
747  dst[j] = dbswap((bswap(src[j]) + dither[j&7])*scale>>shift);\
748  dst += dstStride;\
749  src += srcStride;\
750  }
751 
752 static int planarCopyWrapper(SwsContext *c, const uint8_t *src[],
753  int srcStride[], int srcSliceY, int srcSliceH,
754  uint8_t *dst[], int dstStride[])
755 {
756  const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat);
757  const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat);
758  int plane, i, j;
759  for (plane = 0; plane < 4; plane++) {
760  int length = (plane == 0 || plane == 3) ? c->srcW : -((-c->srcW ) >> c->chrDstHSubSample);
761  int y = (plane == 0 || plane == 3) ? srcSliceY: -((-srcSliceY) >> c->chrDstVSubSample);
762  int height = (plane == 0 || plane == 3) ? srcSliceH: -((-srcSliceH) >> c->chrDstVSubSample);
763  const uint8_t *srcPtr = src[plane];
764  uint8_t *dstPtr = dst[plane] + dstStride[plane] * y;
765  int shiftonly= plane==1 || plane==2 || (!c->srcRange && plane==0);
766 
767  if (!dst[plane])
768  continue;
769  // ignore palette for GRAY8
770  if (plane == 1 && !dst[2]) continue;
771  if (!src[plane] || (plane == 1 && !src[2])) {
772  if (is16BPS(c->dstFormat) || isNBPS(c->dstFormat)) {
773  fillPlane16(dst[plane], dstStride[plane], length, height, y,
774  plane == 3, desc_dst->comp[plane].depth_minus1,
775  isBE(c->dstFormat));
776  } else {
777  fillPlane(dst[plane], dstStride[plane], length, height, y,
778  (plane == 3) ? 255 : 128);
779  }
780  } else {
781  if(isNBPS(c->srcFormat) || isNBPS(c->dstFormat)
782  || (is16BPS(c->srcFormat) != is16BPS(c->dstFormat))
783  ) {
784  const int src_depth = desc_src->comp[plane].depth_minus1 + 1;
785  const int dst_depth = desc_dst->comp[plane].depth_minus1 + 1;
786  const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;
787  uint16_t *dstPtr2 = (uint16_t*)dstPtr;
788 
789  if (dst_depth == 8) {
790  if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
791  DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, , )
792  } else {
793  DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, av_bswap16, )
794  }
795  } else if (src_depth == 8) {
796  for (i = 0; i < height; i++) {
797  #define COPY816(w)\
798  if(shiftonly){\
799  for (j = 0; j < length; j++)\
800  w(&dstPtr2[j], srcPtr[j]<<(dst_depth-8));\
801  }else{\
802  for (j = 0; j < length; j++)\
803  w(&dstPtr2[j], (srcPtr[j]<<(dst_depth-8)) |\
804  (srcPtr[j]>>(2*8-dst_depth)));\
805  }
806  if(isBE(c->dstFormat)){
807  COPY816(AV_WB16)
808  } else {
809  COPY816(AV_WL16)
810  }
811  dstPtr2 += dstStride[plane]/2;
812  srcPtr += srcStride[plane];
813  }
814  } else if (src_depth <= dst_depth) {
815  int orig_length = length;
816  for (i = 0; i < height; i++) {
817  if(isBE(c->srcFormat) == HAVE_BIGENDIAN &&
818  isBE(c->dstFormat) == HAVE_BIGENDIAN &&
819  shiftonly) {
820  unsigned shift = dst_depth - src_depth;
821  length = orig_length;
822 #if HAVE_FAST_64BIT
823 #define FAST_COPY_UP(shift) \
824  for (j = 0; j < length - 3; j += 4) { \
825  uint64_t v = AV_RN64A(srcPtr2 + j); \
826  AV_WN64A(dstPtr2 + j, v << shift); \
827  } \
828  length &= 3;
829 #else
830 #define FAST_COPY_UP(shift) \
831  for (j = 0; j < length - 1; j += 2) { \
832  uint32_t v = AV_RN32A(srcPtr2 + j); \
833  AV_WN32A(dstPtr2 + j, v << shift); \
834  } \
835  length &= 1;
836 #endif
837  switch (shift)
838  {
839  case 6: FAST_COPY_UP(6); break;
840  case 7: FAST_COPY_UP(7); break;
841  }
842  }
843 #define COPY_UP(r,w) \
844  if(shiftonly){\
845  for (j = 0; j < length; j++){ \
846  unsigned int v= r(&srcPtr2[j]);\
847  w(&dstPtr2[j], v<<(dst_depth-src_depth));\
848  }\
849  }else{\
850  for (j = 0; j < length; j++){ \
851  unsigned int v= r(&srcPtr2[j]);\
852  w(&dstPtr2[j], (v<<(dst_depth-src_depth)) | \
853  (v>>(2*src_depth-dst_depth)));\
854  }\
855  }
856  if(isBE(c->srcFormat)){
857  if(isBE(c->dstFormat)){
858  COPY_UP(AV_RB16, AV_WB16)
859  } else {
860  COPY_UP(AV_RB16, AV_WL16)
861  }
862  } else {
863  if(isBE(c->dstFormat)){
864  COPY_UP(AV_RL16, AV_WB16)
865  } else {
866  COPY_UP(AV_RL16, AV_WL16)
867  }
868  }
869  dstPtr2 += dstStride[plane]/2;
870  srcPtr2 += srcStride[plane]/2;
871  }
872  } else {
873  if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
874  if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
875  DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , )
876  } else {
877  DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , av_bswap16)
878  }
879  }else{
880  if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
881  DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, )
882  } else {
883  DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, av_bswap16)
884  }
885  }
886  }
887  } else if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat) &&
888  isBE(c->srcFormat) != isBE(c->dstFormat)) {
889 
890  for (i = 0; i < height; i++) {
891  for (j = 0; j < length; j++)
892  ((uint16_t *) dstPtr)[j] = av_bswap16(((const uint16_t *) srcPtr)[j]);
893  srcPtr += srcStride[plane];
894  dstPtr += dstStride[plane];
895  }
896  } else if (dstStride[plane] == srcStride[plane] &&
897  srcStride[plane] > 0 && srcStride[plane] == length) {
898  memcpy(dst[plane] + dstStride[plane] * y, src[plane],
899  height * dstStride[plane]);
900  } else {
901  if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat))
902  length *= 2;
903  else if (!desc_src->comp[0].depth_minus1)
904  length >>= 3; // monowhite/black
905  for (i = 0; i < height; i++) {
906  memcpy(dstPtr, srcPtr, length);
907  srcPtr += srcStride[plane];
908  dstPtr += dstStride[plane];
909  }
910  }
911  }
912  }
913  return srcSliceH;
914 }
915 
916 
917 #define IS_DIFFERENT_ENDIANESS(src_fmt, dst_fmt, pix_fmt) \
918  ((src_fmt == pix_fmt ## BE && dst_fmt == pix_fmt ## LE) || \
919  (src_fmt == pix_fmt ## LE && dst_fmt == pix_fmt ## BE))
920 
921 
922 void ff_get_unscaled_swscale(SwsContext *c)
923 {
924  const enum AVPixelFormat srcFormat = c->srcFormat;
925  const enum AVPixelFormat dstFormat = c->dstFormat;
926  const int flags = c->flags;
927  const int dstH = c->dstH;
928  int needsDither;
929 
930  needsDither = isAnyRGB(dstFormat) &&
931  c->dstFormatBpp < 24 &&
932  (c->dstFormatBpp < c->srcFormatBpp || (!isAnyRGB(srcFormat)));
933 
934  /* yv12_to_nv12 */
935  if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) &&
936  (dstFormat == AV_PIX_FMT_NV12 || dstFormat == AV_PIX_FMT_NV21)) {
937  c->swScale = planarToNv12Wrapper;
938  }
939  /* yuv2bgr */
940  if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUV422P ||
941  srcFormat == AV_PIX_FMT_YUVA420P) && isAnyRGB(dstFormat) &&
942  !(flags & SWS_ACCURATE_RND) && !(dstH & 1)) {
943  c->swScale = ff_yuv2rgb_get_func_ptr(c);
944  }
945 
946  if (srcFormat == AV_PIX_FMT_YUV410P &&
947  (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&
948  !(flags & SWS_BITEXACT)) {
949  c->swScale = yvu9ToYv12Wrapper;
950  }
951 
952  /* bgr24toYV12 */
953  if (srcFormat == AV_PIX_FMT_BGR24 &&
954  (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&
955  !(flags & SWS_ACCURATE_RND))
956  c->swScale = bgr24ToYv12Wrapper;
957 
958  /* RGB/BGR -> RGB/BGR (no dither needed forms) */
959  if (isAnyRGB(srcFormat) && isAnyRGB(dstFormat) && findRgbConvFn(c)
960  && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))
961  c->swScale= rgbToRgbWrapper;
962 
963 #define isByteRGB(f) (\
964  f == AV_PIX_FMT_RGB32 ||\
965  f == AV_PIX_FMT_RGB32_1 ||\
966  f == AV_PIX_FMT_RGB24 ||\
967  f == AV_PIX_FMT_BGR32 ||\
968  f == AV_PIX_FMT_BGR32_1 ||\
969  f == AV_PIX_FMT_BGR24)
970 
971  if (isAnyRGB(srcFormat) && isPlanar(srcFormat) && isByteRGB(dstFormat))
972  c->swScale = planarRgbToRgbWrapper;
973 
974  /* bswap 16 bits per pixel/component packed formats */
975  if (IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR444) ||
976  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR48) ||
977  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGRA64) ||
978  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR555) ||
979  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR565) ||
980  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GRAY16) ||
981  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB444) ||
982  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB48) ||
983  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGBA64) ||
984  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB555) ||
985  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB565))
986  c->swScale = packed_16bpc_bswap;
987 
988  if (usePal(srcFormat) && isByteRGB(dstFormat))
989  c->swScale = palToRgbWrapper;
990 
991  if (srcFormat == AV_PIX_FMT_YUV422P) {
992  if (dstFormat == AV_PIX_FMT_YUYV422)
993  c->swScale = yuv422pToYuy2Wrapper;
994  else if (dstFormat == AV_PIX_FMT_UYVY422)
995  c->swScale = yuv422pToUyvyWrapper;
996  }
997 
998  /* LQ converters if -sws 0 or -sws 4*/
999  if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {
1000  /* yv12_to_yuy2 */
1001  if (srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) {
1002  if (dstFormat == AV_PIX_FMT_YUYV422)
1003  c->swScale = planarToYuy2Wrapper;
1004  else if (dstFormat == AV_PIX_FMT_UYVY422)
1005  c->swScale = planarToUyvyWrapper;
1006  }
1007  }
1008  if (srcFormat == AV_PIX_FMT_YUYV422 &&
1009  (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))
1010  c->swScale = yuyvToYuv420Wrapper;
1011  if (srcFormat == AV_PIX_FMT_UYVY422 &&
1012  (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))
1013  c->swScale = uyvyToYuv420Wrapper;
1014  if (srcFormat == AV_PIX_FMT_YUYV422 && dstFormat == AV_PIX_FMT_YUV422P)
1015  c->swScale = yuyvToYuv422Wrapper;
1016  if (srcFormat == AV_PIX_FMT_UYVY422 && dstFormat == AV_PIX_FMT_YUV422P)
1017  c->swScale = uyvyToYuv422Wrapper;
1018 
1019 #define isPlanarGray(x) (isGray(x) && (x) != AV_PIX_FMT_GRAY8A)
1020  /* simple copy */
1021  if ( srcFormat == dstFormat ||
1022  (srcFormat == AV_PIX_FMT_YUVA420P && dstFormat == AV_PIX_FMT_YUV420P) ||
1023  (srcFormat == AV_PIX_FMT_YUV420P && dstFormat == AV_PIX_FMT_YUVA420P) ||
1024  (isPlanarYUV(srcFormat) && isPlanarGray(dstFormat)) ||
1025  (isPlanarYUV(dstFormat) && isPlanarGray(srcFormat)) ||
1026  (isPlanarGray(dstFormat) && isPlanarGray(srcFormat)) ||
1027  (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&
1028  c->chrDstHSubSample == c->chrSrcHSubSample &&
1029  c->chrDstVSubSample == c->chrSrcVSubSample &&
1030  dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&
1031  srcFormat != AV_PIX_FMT_NV12 && srcFormat != AV_PIX_FMT_NV21))
1032  {
1033  if (isPacked(c->srcFormat))
1034  c->swScale = packedCopyWrapper;
1035  else /* Planar YUV or gray */
1036  c->swScale = planarCopyWrapper;
1037  }
1038 
1039  if (ARCH_BFIN)
1040  ff_bfin_get_unscaled_swscale(c);
1041  if (HAVE_ALTIVEC)
1042  ff_swscale_get_unscaled_altivec(c);
1043 }
1044 
1045 /* Convert the palette to the same packed 32-bit format as the palette */
1046 void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst,
1047  int num_pixels, const uint8_t *palette)
1048 {
1049  int i;
1050 
1051  for (i = 0; i < num_pixels; i++)
1052  ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];
1053 }
1054 
1055 /* Palette format: ABCD -> dst format: ABC */
1056 void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst,
1057  int num_pixels, const uint8_t *palette)
1058 {
1059  int i;
1060 
1061  for (i = 0; i < num_pixels; i++) {
1062  //FIXME slow?
1063  dst[0] = palette[src[i] * 4 + 0];
1064  dst[1] = palette[src[i] * 4 + 1];
1065  dst[2] = palette[src[i] * 4 + 2];
1066  dst += 3;
1067  }
1068 }
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