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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 static void packedtogbr24p(const uint8_t *src, int srcStride,
492  uint8_t *dst[], int dstStride[], int srcSliceH,
493  int alpha_first, int inc_size, int width)
494 {
495  uint8_t *dest[3];
496  int x, h;
497 
498  dest[0] = dst[0];
499  dest[1] = dst[1];
500  dest[2] = dst[2];
501 
502  if (alpha_first)
503  src++;
504 
505  for (h = 0; h < srcSliceH; h++) {
506  for (x = 0; x < width; x++) {
507  dest[0][x] = src[0];
508  dest[1][x] = src[1];
509  dest[2][x] = src[2];
510 
511  src += inc_size;
512  }
513  src += srcStride - width * inc_size;
514  dest[0] += dstStride[0];
515  dest[1] += dstStride[1];
516  dest[2] += dstStride[2];
517  }
518 }
519 
520 static int rgbToPlanarRgbWrapper(SwsContext *c, const uint8_t *src[],
521  int srcStride[], int srcSliceY, int srcSliceH,
522  uint8_t *dst[], int dstStride[])
523 {
524  int alpha_first = 0;
525  int stride102[] = { dstStride[1], dstStride[0], dstStride[2] };
526  int stride201[] = { dstStride[2], dstStride[0], dstStride[1] };
527  uint8_t *dst102[] = { dst[1] + srcSliceY * dstStride[1],
528  dst[0] + srcSliceY * dstStride[0],
529  dst[2] + srcSliceY * dstStride[2] };
530  uint8_t *dst201[] = { dst[2] + srcSliceY * dstStride[2],
531  dst[0] + srcSliceY * dstStride[0],
532  dst[1] + srcSliceY * dstStride[1] };
533 
534  switch (c->srcFormat) {
535  case PIX_FMT_RGB24:
536  packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst201,
537  stride201, srcSliceH, alpha_first, 3, c->srcW);
538  break;
539  case PIX_FMT_BGR24:
540  packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst102,
541  stride102, srcSliceH, alpha_first, 3, c->srcW);
542  break;
543  case PIX_FMT_ARGB:
544  alpha_first = 1;
545  case PIX_FMT_RGBA:
546  packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst201,
547  stride201, srcSliceH, alpha_first, 4, c->srcW);
548  break;
549  case PIX_FMT_ABGR:
550  alpha_first = 1;
551  case PIX_FMT_BGRA:
552  packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst102,
553  stride102, srcSliceH, alpha_first, 4, c->srcW);
554  break;
555  default:
556  av_log(c, AV_LOG_ERROR,
557  "unsupported planar RGB conversion %s -> %s\n",
558  av_get_pix_fmt_name(c->srcFormat),
559  av_get_pix_fmt_name(c->dstFormat));
560  }
561 
562  return srcSliceH;
563 }
564 
565 #define isRGBA32(x) ( \
566  (x) == AV_PIX_FMT_ARGB \
567  || (x) == AV_PIX_FMT_RGBA \
568  || (x) == AV_PIX_FMT_BGRA \
569  || (x) == AV_PIX_FMT_ABGR \
570  )
571 
572 #define isRGBA64(x) ( \
573  (x) == AV_PIX_FMT_RGBA64LE \
574  || (x) == AV_PIX_FMT_RGBA64BE \
575  || (x) == AV_PIX_FMT_BGRA64LE \
576  || (x) == AV_PIX_FMT_BGRA64BE \
577  )
578 
579 #define isRGB48(x) ( \
580  (x) == AV_PIX_FMT_RGB48LE \
581  || (x) == AV_PIX_FMT_RGB48BE \
582  || (x) == AV_PIX_FMT_BGR48LE \
583  || (x) == AV_PIX_FMT_BGR48BE \
584  )
585 
586 /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
587 typedef void (* rgbConvFn) (const uint8_t *, uint8_t *, int);
588 static rgbConvFn findRgbConvFn(SwsContext *c)
589 {
590  const enum AVPixelFormat srcFormat = c->srcFormat;
591  const enum AVPixelFormat dstFormat = c->dstFormat;
592  const int srcId = c->srcFormatBpp;
593  const int dstId = c->dstFormatBpp;
594  rgbConvFn conv = NULL;
595 
596 #define IS_NOT_NE(bpp, desc) \
597  (((bpp + 7) >> 3) == 2 && \
598  (!(desc->flags & PIX_FMT_BE) != !HAVE_BIGENDIAN))
599 
600 #define CONV_IS(src, dst) (srcFormat == AV_PIX_FMT_##src && dstFormat == AV_PIX_FMT_##dst)
601 
602  if (isRGBA32(srcFormat) && isRGBA32(dstFormat)) {
603  if ( CONV_IS(ABGR, RGBA)
604  || CONV_IS(ARGB, BGRA)
605  || CONV_IS(BGRA, ARGB)
606  || CONV_IS(RGBA, ABGR)) conv = shuffle_bytes_3210;
607  else if (CONV_IS(ABGR, ARGB)
608  || CONV_IS(ARGB, ABGR)) conv = shuffle_bytes_0321;
609  else if (CONV_IS(ABGR, BGRA)
610  || CONV_IS(ARGB, RGBA)) conv = shuffle_bytes_1230;
611  else if (CONV_IS(BGRA, RGBA)
612  || CONV_IS(RGBA, BGRA)) conv = shuffle_bytes_2103;
613  else if (CONV_IS(BGRA, ABGR)
614  || CONV_IS(RGBA, ARGB)) conv = shuffle_bytes_3012;
615  } else if (isRGB48(srcFormat) && isRGB48(dstFormat)) {
616  if (CONV_IS(RGB48LE, BGR48LE)
617  || CONV_IS(BGR48LE, RGB48LE)
618  || CONV_IS(RGB48BE, BGR48BE)
619  || CONV_IS(BGR48BE, RGB48BE)) conv = rgb48tobgr48_nobswap;
620  else if (CONV_IS(RGB48LE, BGR48BE)
621  || CONV_IS(BGR48LE, RGB48BE)
622  || CONV_IS(RGB48BE, BGR48LE)
623  || CONV_IS(BGR48BE, RGB48LE)) conv = rgb48tobgr48_bswap;
624  } else if (isRGBA64(srcFormat) && isRGB48(dstFormat)) {
625  if (CONV_IS(RGBA64LE, BGR48LE)
626  || CONV_IS(BGRA64LE, RGB48LE)
627  || CONV_IS(RGBA64BE, BGR48BE)
628  || CONV_IS(BGRA64BE, RGB48BE)) conv = rgb64tobgr48_nobswap;
629  else if (CONV_IS(RGBA64LE, BGR48BE)
630  || CONV_IS(BGRA64LE, RGB48BE)
631  || CONV_IS(RGBA64BE, BGR48LE)
632  || CONV_IS(BGRA64BE, RGB48LE)) conv = rgb64tobgr48_bswap;
633  else if (CONV_IS(RGBA64LE, RGB48LE)
634  || CONV_IS(BGRA64LE, BGR48LE)
635  || CONV_IS(RGBA64BE, RGB48BE)
636  || CONV_IS(BGRA64BE, BGR48BE)) conv = rgb64to48_nobswap;
637  else if (CONV_IS(RGBA64LE, RGB48BE)
638  || CONV_IS(BGRA64LE, BGR48BE)
639  || CONV_IS(RGBA64BE, RGB48LE)
640  || CONV_IS(BGRA64BE, BGR48LE)) conv = rgb64to48_bswap;
641  } else
642  /* BGR -> BGR */
643  if ((isBGRinInt(srcFormat) && isBGRinInt(dstFormat)) ||
644  (isRGBinInt(srcFormat) && isRGBinInt(dstFormat))) {
645  switch (srcId | (dstId << 16)) {
646  case 0x000F000C: conv = rgb12to15; break;
647  case 0x000F0010: conv = rgb16to15; break;
648  case 0x000F0018: conv = rgb24to15; break;
649  case 0x000F0020: conv = rgb32to15; break;
650  case 0x0010000F: conv = rgb15to16; break;
651  case 0x00100018: conv = rgb24to16; break;
652  case 0x00100020: conv = rgb32to16; break;
653  case 0x0018000F: conv = rgb15to24; break;
654  case 0x00180010: conv = rgb16to24; break;
655  case 0x00180020: conv = rgb32to24; break;
656  case 0x0020000F: conv = rgb15to32; break;
657  case 0x00200010: conv = rgb16to32; break;
658  case 0x00200018: conv = rgb24to32; break;
659  }
660  } else if ((isBGRinInt(srcFormat) && isRGBinInt(dstFormat)) ||
661  (isRGBinInt(srcFormat) && isBGRinInt(dstFormat))) {
662  switch (srcId | (dstId << 16)) {
663  case 0x000C000C: conv = rgb12tobgr12; break;
664  case 0x000F000F: conv = rgb15tobgr15; break;
665  case 0x000F0010: conv = rgb16tobgr15; break;
666  case 0x000F0018: conv = rgb24tobgr15; break;
667  case 0x000F0020: conv = rgb32tobgr15; break;
668  case 0x0010000F: conv = rgb15tobgr16; break;
669  case 0x00100010: conv = rgb16tobgr16; break;
670  case 0x00100018: conv = rgb24tobgr16; break;
671  case 0x00100020: conv = rgb32tobgr16; break;
672  case 0x0018000F: conv = rgb15tobgr24; break;
673  case 0x00180010: conv = rgb16tobgr24; break;
674  case 0x00180018: conv = rgb24tobgr24; break;
675  case 0x00180020: conv = rgb32tobgr24; break;
676  case 0x0020000F: conv = rgb15tobgr32; break;
677  case 0x00200010: conv = rgb16tobgr32; break;
678  case 0x00200018: conv = rgb24tobgr32; break;
679  }
680  }
681 
682  if ((dstFormat == AV_PIX_FMT_RGB32_1 || dstFormat == AV_PIX_FMT_BGR32_1) && !isRGBA32(srcFormat) && ALT32_CORR<0)
683  return NULL;
684 
685  return conv;
686 }
687 
688 /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
689 static int rgbToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
690  int srcSliceY, int srcSliceH, uint8_t *dst[],
691  int dstStride[])
692 
693 {
694  const enum AVPixelFormat srcFormat = c->srcFormat;
695  const enum AVPixelFormat dstFormat = c->dstFormat;
696  const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat);
697  const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat);
698  const int srcBpp = (c->srcFormatBpp + 7) >> 3;
699  const int dstBpp = (c->dstFormatBpp + 7) >> 3;
700  rgbConvFn conv = findRgbConvFn(c);
701 
702  if (!conv) {
703  av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
704  av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
705  } else {
706  const uint8_t *srcPtr = src[0];
707  uint8_t *dstPtr = dst[0];
708  int src_bswap = IS_NOT_NE(c->srcFormatBpp, desc_src);
709  int dst_bswap = IS_NOT_NE(c->dstFormatBpp, desc_dst);
710 
711  if ((srcFormat == AV_PIX_FMT_RGB32_1 || srcFormat == AV_PIX_FMT_BGR32_1) &&
712  !isRGBA32(dstFormat))
713  srcPtr += ALT32_CORR;
714 
715  if ((dstFormat == AV_PIX_FMT_RGB32_1 || dstFormat == AV_PIX_FMT_BGR32_1) &&
716  !isRGBA32(srcFormat))
717  dstPtr += ALT32_CORR;
718 
719  if (dstStride[0] * srcBpp == srcStride[0] * dstBpp && srcStride[0] > 0 &&
720  !(srcStride[0] % srcBpp) && !dst_bswap && !src_bswap)
721  conv(srcPtr, dstPtr + dstStride[0] * srcSliceY,
722  srcSliceH * srcStride[0]);
723  else {
724  int i, j;
725  dstPtr += dstStride[0] * srcSliceY;
726 
727  for (i = 0; i < srcSliceH; i++) {
728  if(src_bswap) {
729  for(j=0; j<c->srcW; j++)
730  ((uint16_t*)c->formatConvBuffer)[j] = av_bswap16(((uint16_t*)srcPtr)[j]);
731  conv(c->formatConvBuffer, dstPtr, c->srcW * srcBpp);
732  }else
733  conv(srcPtr, dstPtr, c->srcW * srcBpp);
734  if(dst_bswap)
735  for(j=0; j<c->srcW; j++)
736  ((uint16_t*)dstPtr)[j] = av_bswap16(((uint16_t*)dstPtr)[j]);
737  srcPtr += srcStride[0];
738  dstPtr += dstStride[0];
739  }
740  }
741  }
742  return srcSliceH;
743 }
744 
745 static int bgr24ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
746  int srcStride[], int srcSliceY, int srcSliceH,
747  uint8_t *dst[], int dstStride[])
748 {
749  rgb24toyv12(
750  src[0],
751  dst[0] + srcSliceY * dstStride[0],
752  dst[1] + (srcSliceY >> 1) * dstStride[1],
753  dst[2] + (srcSliceY >> 1) * dstStride[2],
754  c->srcW, srcSliceH,
755  dstStride[0], dstStride[1], srcStride[0]);
756  if (dst[3])
757  fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
758  return srcSliceH;
759 }
760 
761 static int yvu9ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
762  int srcStride[], int srcSliceY, int srcSliceH,
763  uint8_t *dst[], int dstStride[])
764 {
765  copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
766  dst[0], dstStride[0]);
767 
768  planar2x(src[1], dst[1] + dstStride[1] * (srcSliceY >> 1), c->chrSrcW,
769  srcSliceH >> 2, srcStride[1], dstStride[1]);
770  planar2x(src[2], dst[2] + dstStride[2] * (srcSliceY >> 1), c->chrSrcW,
771  srcSliceH >> 2, srcStride[2], dstStride[2]);
772  if (dst[3])
773  fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
774  return srcSliceH;
775 }
776 
777 /* unscaled copy like stuff (assumes nearly identical formats) */
778 static int packedCopyWrapper(SwsContext *c, const uint8_t *src[],
779  int srcStride[], int srcSliceY, int srcSliceH,
780  uint8_t *dst[], int dstStride[])
781 {
782  if (dstStride[0] == srcStride[0] && srcStride[0] > 0)
783  memcpy(dst[0] + dstStride[0] * srcSliceY, src[0], srcSliceH * dstStride[0]);
784  else {
785  int i;
786  const uint8_t *srcPtr = src[0];
787  uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
788  int length = 0;
789 
790  /* universal length finder */
791  while (length + c->srcW <= FFABS(dstStride[0]) &&
792  length + c->srcW <= FFABS(srcStride[0]))
793  length += c->srcW;
794  av_assert1(length != 0);
795 
796  for (i = 0; i < srcSliceH; i++) {
797  memcpy(dstPtr, srcPtr, length);
798  srcPtr += srcStride[0];
799  dstPtr += dstStride[0];
800  }
801  }
802  return srcSliceH;
803 }
804 
805 #define DITHER_COPY(dst, dstStride, src, srcStride, bswap, dbswap)\
806  uint16_t scale= dither_scale[dst_depth-1][src_depth-1];\
807  int shift= src_depth-dst_depth + dither_scale[src_depth-2][dst_depth-1];\
808  for (i = 0; i < height; i++) {\
809  const uint8_t *dither= dithers[src_depth-9][i&7];\
810  for (j = 0; j < length-7; j+=8){\
811  dst[j+0] = dbswap((bswap(src[j+0]) + dither[0])*scale>>shift);\
812  dst[j+1] = dbswap((bswap(src[j+1]) + dither[1])*scale>>shift);\
813  dst[j+2] = dbswap((bswap(src[j+2]) + dither[2])*scale>>shift);\
814  dst[j+3] = dbswap((bswap(src[j+3]) + dither[3])*scale>>shift);\
815  dst[j+4] = dbswap((bswap(src[j+4]) + dither[4])*scale>>shift);\
816  dst[j+5] = dbswap((bswap(src[j+5]) + dither[5])*scale>>shift);\
817  dst[j+6] = dbswap((bswap(src[j+6]) + dither[6])*scale>>shift);\
818  dst[j+7] = dbswap((bswap(src[j+7]) + dither[7])*scale>>shift);\
819  }\
820  for (; j < length; j++)\
821  dst[j] = dbswap((bswap(src[j]) + dither[j&7])*scale>>shift);\
822  dst += dstStride;\
823  src += srcStride;\
824  }
825 
826 static int planarCopyWrapper(SwsContext *c, const uint8_t *src[],
827  int srcStride[], int srcSliceY, int srcSliceH,
828  uint8_t *dst[], int dstStride[])
829 {
830  const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat);
831  const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat);
832  int plane, i, j;
833  for (plane = 0; plane < 4; plane++) {
834  int length = (plane == 0 || plane == 3) ? c->srcW : -((-c->srcW ) >> c->chrDstHSubSample);
835  int y = (plane == 0 || plane == 3) ? srcSliceY: -((-srcSliceY) >> c->chrDstVSubSample);
836  int height = (plane == 0 || plane == 3) ? srcSliceH: -((-srcSliceH) >> c->chrDstVSubSample);
837  const uint8_t *srcPtr = src[plane];
838  uint8_t *dstPtr = dst[plane] + dstStride[plane] * y;
839  int shiftonly= plane==1 || plane==2 || (!c->srcRange && plane==0);
840 
841  if (!dst[plane])
842  continue;
843  // ignore palette for GRAY8
844  if (plane == 1 && !dst[2]) continue;
845  if (!src[plane] || (plane == 1 && !src[2])) {
846  if (is16BPS(c->dstFormat) || isNBPS(c->dstFormat)) {
847  fillPlane16(dst[plane], dstStride[plane], length, height, y,
848  plane == 3, desc_dst->comp[plane].depth_minus1,
849  isBE(c->dstFormat));
850  } else {
851  fillPlane(dst[plane], dstStride[plane], length, height, y,
852  (plane == 3) ? 255 : 128);
853  }
854  } else {
855  if(isNBPS(c->srcFormat) || isNBPS(c->dstFormat)
856  || (is16BPS(c->srcFormat) != is16BPS(c->dstFormat))
857  ) {
858  const int src_depth = desc_src->comp[plane].depth_minus1 + 1;
859  const int dst_depth = desc_dst->comp[plane].depth_minus1 + 1;
860  const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;
861  uint16_t *dstPtr2 = (uint16_t*)dstPtr;
862 
863  if (dst_depth == 8) {
864  if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
865  DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, , )
866  } else {
867  DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, av_bswap16, )
868  }
869  } else if (src_depth == 8) {
870  for (i = 0; i < height; i++) {
871  #define COPY816(w)\
872  if(shiftonly){\
873  for (j = 0; j < length; j++)\
874  w(&dstPtr2[j], srcPtr[j]<<(dst_depth-8));\
875  }else{\
876  for (j = 0; j < length; j++)\
877  w(&dstPtr2[j], (srcPtr[j]<<(dst_depth-8)) |\
878  (srcPtr[j]>>(2*8-dst_depth)));\
879  }
880  if(isBE(c->dstFormat)){
881  COPY816(AV_WB16)
882  } else {
883  COPY816(AV_WL16)
884  }
885  dstPtr2 += dstStride[plane]/2;
886  srcPtr += srcStride[plane];
887  }
888  } else if (src_depth <= dst_depth) {
889  int orig_length = length;
890  for (i = 0; i < height; i++) {
891  if(isBE(c->srcFormat) == HAVE_BIGENDIAN &&
892  isBE(c->dstFormat) == HAVE_BIGENDIAN &&
893  shiftonly) {
894  unsigned shift = dst_depth - src_depth;
895  length = orig_length;
896 #if HAVE_FAST_64BIT
897 #define FAST_COPY_UP(shift) \
898  for (j = 0; j < length - 3; j += 4) { \
899  uint64_t v = AV_RN64A(srcPtr2 + j); \
900  AV_WN64A(dstPtr2 + j, v << shift); \
901  } \
902  length &= 3;
903 #else
904 #define FAST_COPY_UP(shift) \
905  for (j = 0; j < length - 1; j += 2) { \
906  uint32_t v = AV_RN32A(srcPtr2 + j); \
907  AV_WN32A(dstPtr2 + j, v << shift); \
908  } \
909  length &= 1;
910 #endif
911  switch (shift)
912  {
913  case 6: FAST_COPY_UP(6); break;
914  case 7: FAST_COPY_UP(7); break;
915  }
916  }
917 #define COPY_UP(r,w) \
918  if(shiftonly){\
919  for (j = 0; j < length; j++){ \
920  unsigned int v= r(&srcPtr2[j]);\
921  w(&dstPtr2[j], v<<(dst_depth-src_depth));\
922  }\
923  }else{\
924  for (j = 0; j < length; j++){ \
925  unsigned int v= r(&srcPtr2[j]);\
926  w(&dstPtr2[j], (v<<(dst_depth-src_depth)) | \
927  (v>>(2*src_depth-dst_depth)));\
928  }\
929  }
930  if(isBE(c->srcFormat)){
931  if(isBE(c->dstFormat)){
932  COPY_UP(AV_RB16, AV_WB16)
933  } else {
934  COPY_UP(AV_RB16, AV_WL16)
935  }
936  } else {
937  if(isBE(c->dstFormat)){
938  COPY_UP(AV_RL16, AV_WB16)
939  } else {
940  COPY_UP(AV_RL16, AV_WL16)
941  }
942  }
943  dstPtr2 += dstStride[plane]/2;
944  srcPtr2 += srcStride[plane]/2;
945  }
946  } else {
947  if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
948  if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
949  DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , )
950  } else {
951  DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , av_bswap16)
952  }
953  }else{
954  if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
955  DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, )
956  } else {
957  DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, av_bswap16)
958  }
959  }
960  }
961  } else if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat) &&
962  isBE(c->srcFormat) != isBE(c->dstFormat)) {
963 
964  for (i = 0; i < height; i++) {
965  for (j = 0; j < length; j++)
966  ((uint16_t *) dstPtr)[j] = av_bswap16(((const uint16_t *) srcPtr)[j]);
967  srcPtr += srcStride[plane];
968  dstPtr += dstStride[plane];
969  }
970  } else if (dstStride[plane] == srcStride[plane] &&
971  srcStride[plane] > 0 && srcStride[plane] == length) {
972  memcpy(dst[plane] + dstStride[plane] * y, src[plane],
973  height * dstStride[plane]);
974  } else {
975  if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat))
976  length *= 2;
977  else if (!desc_src->comp[0].depth_minus1)
978  length >>= 3; // monowhite/black
979  for (i = 0; i < height; i++) {
980  memcpy(dstPtr, srcPtr, length);
981  srcPtr += srcStride[plane];
982  dstPtr += dstStride[plane];
983  }
984  }
985  }
986  }
987  return srcSliceH;
988 }
989 
990 
991 #define IS_DIFFERENT_ENDIANESS(src_fmt, dst_fmt, pix_fmt) \
992  ((src_fmt == pix_fmt ## BE && dst_fmt == pix_fmt ## LE) || \
993  (src_fmt == pix_fmt ## LE && dst_fmt == pix_fmt ## BE))
994 
995 
996 void ff_get_unscaled_swscale(SwsContext *c)
997 {
998  const enum AVPixelFormat srcFormat = c->srcFormat;
999  const enum AVPixelFormat dstFormat = c->dstFormat;
1000  const int flags = c->flags;
1001  const int dstH = c->dstH;
1002  int needsDither;
1003 
1004  needsDither = isAnyRGB(dstFormat) &&
1005  c->dstFormatBpp < 24 &&
1006  (c->dstFormatBpp < c->srcFormatBpp || (!isAnyRGB(srcFormat)));
1007 
1008  /* yv12_to_nv12 */
1009  if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) &&
1010  (dstFormat == AV_PIX_FMT_NV12 || dstFormat == AV_PIX_FMT_NV21)) {
1011  c->swScale = planarToNv12Wrapper;
1012  }
1013  /* yuv2bgr */
1014  if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUV422P ||
1015  srcFormat == AV_PIX_FMT_YUVA420P) && isAnyRGB(dstFormat) &&
1016  !(flags & (SWS_ACCURATE_RND|SWS_ERROR_DIFFUSION)) && !(dstH & 1)) {
1017  c->swScale = ff_yuv2rgb_get_func_ptr(c);
1018  }
1019 
1020  if (srcFormat == AV_PIX_FMT_YUV410P &&
1021  (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&
1022  !(flags & SWS_BITEXACT)) {
1023  c->swScale = yvu9ToYv12Wrapper;
1024  }
1025 
1026  /* bgr24toYV12 */
1027  if (srcFormat == AV_PIX_FMT_BGR24 &&
1028  (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&
1029  !(flags & SWS_ACCURATE_RND))
1030  c->swScale = bgr24ToYv12Wrapper;
1031 
1032  /* RGB/BGR -> RGB/BGR (no dither needed forms) */
1033  if (isAnyRGB(srcFormat) && isAnyRGB(dstFormat) && findRgbConvFn(c)
1034  && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))
1035  c->swScale= rgbToRgbWrapper;
1036 
1037 #define isByteRGB(f) ( \
1038  f == AV_PIX_FMT_RGB32 || \
1039  f == AV_PIX_FMT_RGB32_1 || \
1040  f == AV_PIX_FMT_RGB24 || \
1041  f == AV_PIX_FMT_BGR32 || \
1042  f == AV_PIX_FMT_BGR32_1 || \
1043  f == AV_PIX_FMT_BGR24)
1044 
1045  if (srcFormat == AV_PIX_FMT_GBRP && isPlanar(srcFormat) && isByteRGB(dstFormat))
1046  c->swScale = planarRgbToRgbWrapper;
1047 
1048  if (av_pix_fmt_desc_get(srcFormat)->comp[0].depth_minus1 == 7 &&
1049  isPackedRGB(srcFormat) && dstFormat == AV_PIX_FMT_GBRP)
1050  c->swScale = rgbToPlanarRgbWrapper;
1051 
1052  /* bswap 16 bits per pixel/component packed formats */
1053  if (IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR444) ||
1054  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR48) ||
1055  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGRA64) ||
1056  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR555) ||
1057  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR565) ||
1058  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GRAY16) ||
1059  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB444) ||
1060  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB48) ||
1061  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGBA64) ||
1062  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB555) ||
1063  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB565))
1064  c->swScale = packed_16bpc_bswap;
1065 
1066  if (usePal(srcFormat) && isByteRGB(dstFormat))
1067  c->swScale = palToRgbWrapper;
1068 
1069  if (srcFormat == AV_PIX_FMT_YUV422P) {
1070  if (dstFormat == AV_PIX_FMT_YUYV422)
1071  c->swScale = yuv422pToYuy2Wrapper;
1072  else if (dstFormat == AV_PIX_FMT_UYVY422)
1073  c->swScale = yuv422pToUyvyWrapper;
1074  }
1075 
1076  /* LQ converters if -sws 0 or -sws 4*/
1077  if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {
1078  /* yv12_to_yuy2 */
1079  if (srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) {
1080  if (dstFormat == AV_PIX_FMT_YUYV422)
1081  c->swScale = planarToYuy2Wrapper;
1082  else if (dstFormat == AV_PIX_FMT_UYVY422)
1083  c->swScale = planarToUyvyWrapper;
1084  }
1085  }
1086  if (srcFormat == AV_PIX_FMT_YUYV422 &&
1087  (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))
1088  c->swScale = yuyvToYuv420Wrapper;
1089  if (srcFormat == AV_PIX_FMT_UYVY422 &&
1090  (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))
1091  c->swScale = uyvyToYuv420Wrapper;
1092  if (srcFormat == AV_PIX_FMT_YUYV422 && dstFormat == AV_PIX_FMT_YUV422P)
1093  c->swScale = yuyvToYuv422Wrapper;
1094  if (srcFormat == AV_PIX_FMT_UYVY422 && dstFormat == AV_PIX_FMT_YUV422P)
1095  c->swScale = uyvyToYuv422Wrapper;
1096 
1097 #define isPlanarGray(x) (isGray(x) && (x) != AV_PIX_FMT_GRAY8A)
1098  /* simple copy */
1099  if ( srcFormat == dstFormat ||
1100  (srcFormat == AV_PIX_FMT_YUVA420P && dstFormat == AV_PIX_FMT_YUV420P) ||
1101  (srcFormat == AV_PIX_FMT_YUV420P && dstFormat == AV_PIX_FMT_YUVA420P) ||
1102  (isPlanarYUV(srcFormat) && isPlanarGray(dstFormat)) ||
1103  (isPlanarYUV(dstFormat) && isPlanarGray(srcFormat)) ||
1104  (isPlanarGray(dstFormat) && isPlanarGray(srcFormat)) ||
1105  (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&
1106  c->chrDstHSubSample == c->chrSrcHSubSample &&
1107  c->chrDstVSubSample == c->chrSrcVSubSample &&
1108  dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&
1109  srcFormat != AV_PIX_FMT_NV12 && srcFormat != AV_PIX_FMT_NV21))
1110  {
1111  if (isPacked(c->srcFormat))
1112  c->swScale = packedCopyWrapper;
1113  else /* Planar YUV or gray */
1114  c->swScale = planarCopyWrapper;
1115  }
1116 
1117  if (ARCH_BFIN)
1118  ff_bfin_get_unscaled_swscale(c);
1119  if (HAVE_ALTIVEC)
1120  ff_swscale_get_unscaled_altivec(c);
1121 }
1122 
1123 /* Convert the palette to the same packed 32-bit format as the palette */
1124 void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst,
1125  int num_pixels, const uint8_t *palette)
1126 {
1127  int i;
1128 
1129  for (i = 0; i < num_pixels; i++)
1130  ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];
1131 }
1132 
1133 /* Palette format: ABCD -> dst format: ABC */
1134 void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst,
1135  int num_pixels, const uint8_t *palette)
1136 {
1137  int i;
1138 
1139  for (i = 0; i < num_pixels; i++) {
1140  //FIXME slow?
1141  dst[0] = palette[src[i] * 4 + 0];
1142  dst[1] = palette[src[i] * 4 + 1];
1143  dst[2] = palette[src[i] * 4 + 2];
1144  dst += 3;
1145  }
1146 }
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