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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, p;
325 
326  for (p = 0; p < 4; p++) {
327  int srcstr = srcStride[p] / 2;
328  int dststr = dstStride[p] / 2;
329  uint16_t *dstPtr = (uint16_t *) dst[p];
330  const uint16_t *srcPtr = (const uint16_t *) src[p];
331  int min_stride = FFMIN(FFABS(srcstr), FFABS(dststr));
332  if(!dstPtr || !srcPtr)
333  continue;
334  for (i = 0; i < (srcSliceH >> c->chrDstVSubSample); i++) {
335  for (j = 0; j < min_stride; j++) {
336  dstPtr[j] = av_bswap16(srcPtr[j]);
337  }
338  srcPtr += srcstr;
339  dstPtr += dststr;
340  }
341  }
342 
343  return srcSliceH;
344 }
345 
346 static int palToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
347  int srcSliceY, int srcSliceH, uint8_t *dst[],
348  int dstStride[])
349 {
350  const enum AVPixelFormat srcFormat = c->srcFormat;
351  const enum AVPixelFormat dstFormat = c->dstFormat;
352  void (*conv)(const uint8_t *src, uint8_t *dst, int num_pixels,
353  const uint8_t *palette) = NULL;
354  int i;
355  uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
356  const uint8_t *srcPtr = src[0];
357 
358  if (srcFormat == AV_PIX_FMT_GRAY8A) {
359  switch (dstFormat) {
360  case AV_PIX_FMT_RGB32 : conv = gray8aToPacked32; break;
361  case AV_PIX_FMT_BGR32 : conv = gray8aToPacked32; break;
362  case AV_PIX_FMT_BGR32_1: conv = gray8aToPacked32_1; break;
363  case AV_PIX_FMT_RGB32_1: conv = gray8aToPacked32_1; break;
364  case AV_PIX_FMT_RGB24 : conv = gray8aToPacked24; break;
365  case AV_PIX_FMT_BGR24 : conv = gray8aToPacked24; break;
366  }
367  } else if (usePal(srcFormat)) {
368  switch (dstFormat) {
369  case AV_PIX_FMT_RGB32 : conv = sws_convertPalette8ToPacked32; break;
370  case AV_PIX_FMT_BGR32 : conv = sws_convertPalette8ToPacked32; break;
371  case AV_PIX_FMT_BGR32_1: conv = sws_convertPalette8ToPacked32; break;
372  case AV_PIX_FMT_RGB32_1: conv = sws_convertPalette8ToPacked32; break;
373  case AV_PIX_FMT_RGB24 : conv = sws_convertPalette8ToPacked24; break;
374  case AV_PIX_FMT_BGR24 : conv = sws_convertPalette8ToPacked24; break;
375  }
376  }
377 
378  if (!conv)
379  av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
380  av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
381  else {
382  for (i = 0; i < srcSliceH; i++) {
383  conv(srcPtr, dstPtr, c->srcW, (uint8_t *) c->pal_rgb);
384  srcPtr += srcStride[0];
385  dstPtr += dstStride[0];
386  }
387  }
388 
389  return srcSliceH;
390 }
391 
392 static void gbr24ptopacked24(const uint8_t *src[], int srcStride[],
393  uint8_t *dst, int dstStride, int srcSliceH,
394  int width)
395 {
396  int x, h, i;
397  for (h = 0; h < srcSliceH; h++) {
398  uint8_t *dest = dst + dstStride * h;
399  for (x = 0; x < width; x++) {
400  *dest++ = src[0][x];
401  *dest++ = src[1][x];
402  *dest++ = src[2][x];
403  }
404 
405  for (i = 0; i < 3; i++)
406  src[i] += srcStride[i];
407  }
408 }
409 
410 static void gbr24ptopacked32(const uint8_t *src[], int srcStride[],
411  uint8_t *dst, int dstStride, int srcSliceH,
412  int alpha_first, int width)
413 {
414  int x, h, i;
415  for (h = 0; h < srcSliceH; h++) {
416  uint8_t *dest = dst + dstStride * h;
417 
418  if (alpha_first) {
419  for (x = 0; x < width; x++) {
420  *dest++ = 0xff;
421  *dest++ = src[0][x];
422  *dest++ = src[1][x];
423  *dest++ = src[2][x];
424  }
425  } else {
426  for (x = 0; x < width; x++) {
427  *dest++ = src[0][x];
428  *dest++ = src[1][x];
429  *dest++ = src[2][x];
430  *dest++ = 0xff;
431  }
432  }
433 
434  for (i = 0; i < 3; i++)
435  src[i] += srcStride[i];
436  }
437 }
438 
439 static int planarRgbToRgbWrapper(SwsContext *c, const uint8_t *src[],
440  int srcStride[], int srcSliceY, int srcSliceH,
441  uint8_t *dst[], int dstStride[])
442 {
443  int alpha_first = 0;
444  const uint8_t *src102[] = { src[1], src[0], src[2] };
445  const uint8_t *src201[] = { src[2], src[0], src[1] };
446  int stride102[] = { srcStride[1], srcStride[0], srcStride[2] };
447  int stride201[] = { srcStride[2], srcStride[0], srcStride[1] };
448 
449  if (c->srcFormat != AV_PIX_FMT_GBRP) {
450  av_log(c, AV_LOG_ERROR, "unsupported planar RGB conversion %s -> %s\n",
451  av_get_pix_fmt_name(c->srcFormat),
452  av_get_pix_fmt_name(c->dstFormat));
453  return srcSliceH;
454  }
455 
456  switch (c->dstFormat) {
457  case AV_PIX_FMT_BGR24:
458  gbr24ptopacked24(src102, stride102,
459  dst[0] + srcSliceY * dstStride[0], dstStride[0],
460  srcSliceH, c->srcW);
461  break;
462 
463  case AV_PIX_FMT_RGB24:
464  gbr24ptopacked24(src201, stride201,
465  dst[0] + srcSliceY * dstStride[0], dstStride[0],
466  srcSliceH, c->srcW);
467  break;
468 
469  case AV_PIX_FMT_ARGB:
470  alpha_first = 1;
471  case AV_PIX_FMT_RGBA:
472  gbr24ptopacked32(src201, stride201,
473  dst[0] + srcSliceY * dstStride[0], dstStride[0],
474  srcSliceH, alpha_first, c->srcW);
475  break;
476 
477  case AV_PIX_FMT_ABGR:
478  alpha_first = 1;
479  case AV_PIX_FMT_BGRA:
480  gbr24ptopacked32(src102, stride102,
481  dst[0] + srcSliceY * dstStride[0], dstStride[0],
482  srcSliceH, alpha_first, c->srcW);
483  break;
484 
485  default:
486  av_log(c, AV_LOG_ERROR,
487  "unsupported planar RGB conversion %s -> %s\n",
488  av_get_pix_fmt_name(c->srcFormat),
489  av_get_pix_fmt_name(c->dstFormat));
490  }
491 
492  return srcSliceH;
493 }
494 
495 static int planarRgbToplanarRgbWrapper(SwsContext *c, const uint8_t *src[],
496  int srcStride[], int srcSliceY, int srcSliceH,
497  uint8_t *dst[], int dstStride[])
498 {
499  copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
500  dst[0], dstStride[0]);
501  copyPlane(src[1], srcStride[1], srcSliceY, srcSliceH, c->srcW,
502  dst[1], dstStride[1]);
503  copyPlane(src[2], srcStride[2], srcSliceY, srcSliceH, c->srcW,
504  dst[2], dstStride[2]);
505  if (dst[3])
506  fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
507 
508  return srcSliceH;
509 }
510 
511 static void packedtogbr24p(const uint8_t *src, int srcStride,
512  uint8_t *dst[], int dstStride[], int srcSliceH,
513  int alpha_first, int inc_size, int width)
514 {
515  uint8_t *dest[3];
516  int x, h;
517 
518  dest[0] = dst[0];
519  dest[1] = dst[1];
520  dest[2] = dst[2];
521 
522  if (alpha_first)
523  src++;
524 
525  for (h = 0; h < srcSliceH; h++) {
526  for (x = 0; x < width; x++) {
527  dest[0][x] = src[0];
528  dest[1][x] = src[1];
529  dest[2][x] = src[2];
530 
531  src += inc_size;
532  }
533  src += srcStride - width * inc_size;
534  dest[0] += dstStride[0];
535  dest[1] += dstStride[1];
536  dest[2] += dstStride[2];
537  }
538 }
539 
540 static int rgbToPlanarRgbWrapper(SwsContext *c, const uint8_t *src[],
541  int srcStride[], int srcSliceY, int srcSliceH,
542  uint8_t *dst[], int dstStride[])
543 {
544  int alpha_first = 0;
545  int stride102[] = { dstStride[1], dstStride[0], dstStride[2] };
546  int stride201[] = { dstStride[2], dstStride[0], dstStride[1] };
547  uint8_t *dst102[] = { dst[1] + srcSliceY * dstStride[1],
548  dst[0] + srcSliceY * dstStride[0],
549  dst[2] + srcSliceY * dstStride[2] };
550  uint8_t *dst201[] = { dst[2] + srcSliceY * dstStride[2],
551  dst[0] + srcSliceY * dstStride[0],
552  dst[1] + srcSliceY * dstStride[1] };
553 
554  switch (c->srcFormat) {
555  case AV_PIX_FMT_RGB24:
556  packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst201,
557  stride201, srcSliceH, alpha_first, 3, c->srcW);
558  break;
559  case AV_PIX_FMT_BGR24:
560  packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst102,
561  stride102, srcSliceH, alpha_first, 3, c->srcW);
562  break;
563  case AV_PIX_FMT_ARGB:
564  alpha_first = 1;
565  case AV_PIX_FMT_RGBA:
566  packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst201,
567  stride201, srcSliceH, alpha_first, 4, c->srcW);
568  break;
569  case AV_PIX_FMT_ABGR:
570  alpha_first = 1;
571  case AV_PIX_FMT_BGRA:
572  packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst102,
573  stride102, srcSliceH, alpha_first, 4, c->srcW);
574  break;
575  default:
576  av_log(c, AV_LOG_ERROR,
577  "unsupported planar RGB conversion %s -> %s\n",
578  av_get_pix_fmt_name(c->srcFormat),
579  av_get_pix_fmt_name(c->dstFormat));
580  }
581 
582  return srcSliceH;
583 }
584 
585 #define isRGBA32(x) ( \
586  (x) == AV_PIX_FMT_ARGB \
587  || (x) == AV_PIX_FMT_RGBA \
588  || (x) == AV_PIX_FMT_BGRA \
589  || (x) == AV_PIX_FMT_ABGR \
590  )
591 
592 #define isRGBA64(x) ( \
593  (x) == AV_PIX_FMT_RGBA64LE \
594  || (x) == AV_PIX_FMT_RGBA64BE \
595  || (x) == AV_PIX_FMT_BGRA64LE \
596  || (x) == AV_PIX_FMT_BGRA64BE \
597  )
598 
599 #define isRGB48(x) ( \
600  (x) == AV_PIX_FMT_RGB48LE \
601  || (x) == AV_PIX_FMT_RGB48BE \
602  || (x) == AV_PIX_FMT_BGR48LE \
603  || (x) == AV_PIX_FMT_BGR48BE \
604  )
605 
606 /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
607 typedef void (* rgbConvFn) (const uint8_t *, uint8_t *, int);
608 static rgbConvFn findRgbConvFn(SwsContext *c)
609 {
610  const enum AVPixelFormat srcFormat = c->srcFormat;
611  const enum AVPixelFormat dstFormat = c->dstFormat;
612  const int srcId = c->srcFormatBpp;
613  const int dstId = c->dstFormatBpp;
614  rgbConvFn conv = NULL;
615 
616 #define IS_NOT_NE(bpp, desc) \
617  (((bpp + 7) >> 3) == 2 && \
618  (!(desc->flags & AV_PIX_FMT_FLAG_BE) != !HAVE_BIGENDIAN))
619 
620 #define CONV_IS(src, dst) (srcFormat == AV_PIX_FMT_##src && dstFormat == AV_PIX_FMT_##dst)
621 
622  if (isRGBA32(srcFormat) && isRGBA32(dstFormat)) {
623  if ( CONV_IS(ABGR, RGBA)
624  || CONV_IS(ARGB, BGRA)
625  || CONV_IS(BGRA, ARGB)
626  || CONV_IS(RGBA, ABGR)) conv = shuffle_bytes_3210;
627  else if (CONV_IS(ABGR, ARGB)
628  || CONV_IS(ARGB, ABGR)) conv = shuffle_bytes_0321;
629  else if (CONV_IS(ABGR, BGRA)
630  || CONV_IS(ARGB, RGBA)) conv = shuffle_bytes_1230;
631  else if (CONV_IS(BGRA, RGBA)
632  || CONV_IS(RGBA, BGRA)) conv = shuffle_bytes_2103;
633  else if (CONV_IS(BGRA, ABGR)
634  || CONV_IS(RGBA, ARGB)) conv = shuffle_bytes_3012;
635  } else if (isRGB48(srcFormat) && isRGB48(dstFormat)) {
636  if (CONV_IS(RGB48LE, BGR48LE)
637  || CONV_IS(BGR48LE, RGB48LE)
638  || CONV_IS(RGB48BE, BGR48BE)
639  || CONV_IS(BGR48BE, RGB48BE)) conv = rgb48tobgr48_nobswap;
640  else if (CONV_IS(RGB48LE, BGR48BE)
641  || CONV_IS(BGR48LE, RGB48BE)
642  || CONV_IS(RGB48BE, BGR48LE)
643  || CONV_IS(BGR48BE, RGB48LE)) conv = rgb48tobgr48_bswap;
644  } else if (isRGBA64(srcFormat) && isRGB48(dstFormat)) {
645  if (CONV_IS(RGBA64LE, BGR48LE)
646  || CONV_IS(BGRA64LE, RGB48LE)
647  || CONV_IS(RGBA64BE, BGR48BE)
648  || CONV_IS(BGRA64BE, RGB48BE)) conv = rgb64tobgr48_nobswap;
649  else if (CONV_IS(RGBA64LE, BGR48BE)
650  || CONV_IS(BGRA64LE, RGB48BE)
651  || CONV_IS(RGBA64BE, BGR48LE)
652  || CONV_IS(BGRA64BE, RGB48LE)) conv = rgb64tobgr48_bswap;
653  else if (CONV_IS(RGBA64LE, RGB48LE)
654  || CONV_IS(BGRA64LE, BGR48LE)
655  || CONV_IS(RGBA64BE, RGB48BE)
656  || CONV_IS(BGRA64BE, BGR48BE)) conv = rgb64to48_nobswap;
657  else if (CONV_IS(RGBA64LE, RGB48BE)
658  || CONV_IS(BGRA64LE, BGR48BE)
659  || CONV_IS(RGBA64BE, RGB48LE)
660  || CONV_IS(BGRA64BE, BGR48LE)) conv = rgb64to48_bswap;
661  } else
662  /* BGR -> BGR */
663  if ((isBGRinInt(srcFormat) && isBGRinInt(dstFormat)) ||
664  (isRGBinInt(srcFormat) && isRGBinInt(dstFormat))) {
665  switch (srcId | (dstId << 16)) {
666  case 0x000F000C: conv = rgb12to15; break;
667  case 0x000F0010: conv = rgb16to15; break;
668  case 0x000F0018: conv = rgb24to15; break;
669  case 0x000F0020: conv = rgb32to15; break;
670  case 0x0010000F: conv = rgb15to16; break;
671  case 0x00100018: conv = rgb24to16; break;
672  case 0x00100020: conv = rgb32to16; break;
673  case 0x0018000F: conv = rgb15to24; break;
674  case 0x00180010: conv = rgb16to24; break;
675  case 0x00180020: conv = rgb32to24; break;
676  case 0x0020000F: conv = rgb15to32; break;
677  case 0x00200010: conv = rgb16to32; break;
678  case 0x00200018: conv = rgb24to32; break;
679  }
680  } else if ((isBGRinInt(srcFormat) && isRGBinInt(dstFormat)) ||
681  (isRGBinInt(srcFormat) && isBGRinInt(dstFormat))) {
682  switch (srcId | (dstId << 16)) {
683  case 0x000C000C: conv = rgb12tobgr12; break;
684  case 0x000F000F: conv = rgb15tobgr15; break;
685  case 0x000F0010: conv = rgb16tobgr15; break;
686  case 0x000F0018: conv = rgb24tobgr15; break;
687  case 0x000F0020: conv = rgb32tobgr15; break;
688  case 0x0010000F: conv = rgb15tobgr16; break;
689  case 0x00100010: conv = rgb16tobgr16; break;
690  case 0x00100018: conv = rgb24tobgr16; break;
691  case 0x00100020: conv = rgb32tobgr16; break;
692  case 0x0018000F: conv = rgb15tobgr24; break;
693  case 0x00180010: conv = rgb16tobgr24; break;
694  case 0x00180018: conv = rgb24tobgr24; break;
695  case 0x00180020: conv = rgb32tobgr24; break;
696  case 0x0020000F: conv = rgb15tobgr32; break;
697  case 0x00200010: conv = rgb16tobgr32; break;
698  case 0x00200018: conv = rgb24tobgr32; break;
699  }
700  }
701 
702  if ((dstFormat == AV_PIX_FMT_RGB32_1 || dstFormat == AV_PIX_FMT_BGR32_1) && !isRGBA32(srcFormat) && ALT32_CORR<0)
703  return NULL;
704 
705  return conv;
706 }
707 
708 /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
709 static int rgbToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
710  int srcSliceY, int srcSliceH, uint8_t *dst[],
711  int dstStride[])
712 
713 {
714  const enum AVPixelFormat srcFormat = c->srcFormat;
715  const enum AVPixelFormat dstFormat = c->dstFormat;
716  const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat);
717  const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat);
718  const int srcBpp = (c->srcFormatBpp + 7) >> 3;
719  const int dstBpp = (c->dstFormatBpp + 7) >> 3;
720  rgbConvFn conv = findRgbConvFn(c);
721 
722  if (!conv) {
723  av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
724  av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
725  } else {
726  const uint8_t *srcPtr = src[0];
727  uint8_t *dstPtr = dst[0];
728  int src_bswap = IS_NOT_NE(c->srcFormatBpp, desc_src);
729  int dst_bswap = IS_NOT_NE(c->dstFormatBpp, desc_dst);
730 
731  if ((srcFormat == AV_PIX_FMT_RGB32_1 || srcFormat == AV_PIX_FMT_BGR32_1) &&
732  !isRGBA32(dstFormat))
733  srcPtr += ALT32_CORR;
734 
735  if ((dstFormat == AV_PIX_FMT_RGB32_1 || dstFormat == AV_PIX_FMT_BGR32_1) &&
736  !isRGBA32(srcFormat))
737  dstPtr += ALT32_CORR;
738 
739  if (dstStride[0] * srcBpp == srcStride[0] * dstBpp && srcStride[0] > 0 &&
740  !(srcStride[0] % srcBpp) && !dst_bswap && !src_bswap)
741  conv(srcPtr, dstPtr + dstStride[0] * srcSliceY,
742  srcSliceH * srcStride[0]);
743  else {
744  int i, j;
745  dstPtr += dstStride[0] * srcSliceY;
746 
747  for (i = 0; i < srcSliceH; i++) {
748  if(src_bswap) {
749  for(j=0; j<c->srcW; j++)
750  ((uint16_t*)c->formatConvBuffer)[j] = av_bswap16(((uint16_t*)srcPtr)[j]);
751  conv(c->formatConvBuffer, dstPtr, c->srcW * srcBpp);
752  }else
753  conv(srcPtr, dstPtr, c->srcW * srcBpp);
754  if(dst_bswap)
755  for(j=0; j<c->srcW; j++)
756  ((uint16_t*)dstPtr)[j] = av_bswap16(((uint16_t*)dstPtr)[j]);
757  srcPtr += srcStride[0];
758  dstPtr += dstStride[0];
759  }
760  }
761  }
762  return srcSliceH;
763 }
764 
765 static int bgr24ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
766  int srcStride[], int srcSliceY, int srcSliceH,
767  uint8_t *dst[], int dstStride[])
768 {
769  ff_rgb24toyv12(
770  src[0],
771  dst[0] + srcSliceY * dstStride[0],
772  dst[1] + (srcSliceY >> 1) * dstStride[1],
773  dst[2] + (srcSliceY >> 1) * dstStride[2],
774  c->srcW, srcSliceH,
775  dstStride[0], dstStride[1], srcStride[0],
776  c->input_rgb2yuv_table);
777  if (dst[3])
778  fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
779  return srcSliceH;
780 }
781 
782 static int yvu9ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
783  int srcStride[], int srcSliceY, int srcSliceH,
784  uint8_t *dst[], int dstStride[])
785 {
786  copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
787  dst[0], dstStride[0]);
788 
789  planar2x(src[1], dst[1] + dstStride[1] * (srcSliceY >> 1), c->chrSrcW,
790  srcSliceH >> 2, srcStride[1], dstStride[1]);
791  planar2x(src[2], dst[2] + dstStride[2] * (srcSliceY >> 1), c->chrSrcW,
792  srcSliceH >> 2, srcStride[2], dstStride[2]);
793  if (dst[3])
794  fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
795  return srcSliceH;
796 }
797 
798 /* unscaled copy like stuff (assumes nearly identical formats) */
799 static int packedCopyWrapper(SwsContext *c, const uint8_t *src[],
800  int srcStride[], int srcSliceY, int srcSliceH,
801  uint8_t *dst[], int dstStride[])
802 {
803  if (dstStride[0] == srcStride[0] && srcStride[0] > 0)
804  memcpy(dst[0] + dstStride[0] * srcSliceY, src[0], srcSliceH * dstStride[0]);
805  else {
806  int i;
807  const uint8_t *srcPtr = src[0];
808  uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
809  int length = 0;
810 
811  /* universal length finder */
812  while (length + c->srcW <= FFABS(dstStride[0]) &&
813  length + c->srcW <= FFABS(srcStride[0]))
814  length += c->srcW;
815  av_assert1(length != 0);
816 
817  for (i = 0; i < srcSliceH; i++) {
818  memcpy(dstPtr, srcPtr, length);
819  srcPtr += srcStride[0];
820  dstPtr += dstStride[0];
821  }
822  }
823  return srcSliceH;
824 }
825 
826 #define DITHER_COPY(dst, dstStride, src, srcStride, bswap, dbswap)\
827  uint16_t scale= dither_scale[dst_depth-1][src_depth-1];\
828  int shift= src_depth-dst_depth + dither_scale[src_depth-2][dst_depth-1];\
829  for (i = 0; i < height; i++) {\
830  const uint8_t *dither= dithers[src_depth-9][i&7];\
831  for (j = 0; j < length-7; j+=8){\
832  dst[j+0] = dbswap((bswap(src[j+0]) + dither[0])*scale>>shift);\
833  dst[j+1] = dbswap((bswap(src[j+1]) + dither[1])*scale>>shift);\
834  dst[j+2] = dbswap((bswap(src[j+2]) + dither[2])*scale>>shift);\
835  dst[j+3] = dbswap((bswap(src[j+3]) + dither[3])*scale>>shift);\
836  dst[j+4] = dbswap((bswap(src[j+4]) + dither[4])*scale>>shift);\
837  dst[j+5] = dbswap((bswap(src[j+5]) + dither[5])*scale>>shift);\
838  dst[j+6] = dbswap((bswap(src[j+6]) + dither[6])*scale>>shift);\
839  dst[j+7] = dbswap((bswap(src[j+7]) + dither[7])*scale>>shift);\
840  }\
841  for (; j < length; j++)\
842  dst[j] = dbswap((bswap(src[j]) + dither[j&7])*scale>>shift);\
843  dst += dstStride;\
844  src += srcStride;\
845  }
846 
847 static int planarCopyWrapper(SwsContext *c, const uint8_t *src[],
848  int srcStride[], int srcSliceY, int srcSliceH,
849  uint8_t *dst[], int dstStride[])
850 {
851  const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat);
852  const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat);
853  int plane, i, j;
854  for (plane = 0; plane < 4; plane++) {
855  int length = (plane == 0 || plane == 3) ? c->srcW : FF_CEIL_RSHIFT(c->srcW, c->chrDstHSubSample);
856  int y = (plane == 0 || plane == 3) ? srcSliceY: FF_CEIL_RSHIFT(srcSliceY, c->chrDstVSubSample);
857  int height = (plane == 0 || plane == 3) ? srcSliceH: FF_CEIL_RSHIFT(srcSliceH, c->chrDstVSubSample);
858  const uint8_t *srcPtr = src[plane];
859  uint8_t *dstPtr = dst[plane] + dstStride[plane] * y;
860  int shiftonly= plane==1 || plane==2 || (!c->srcRange && plane==0);
861 
862  if (!dst[plane])
863  continue;
864  // ignore palette for GRAY8
865  if (plane == 1 && !dst[2]) continue;
866  if (!src[plane] || (plane == 1 && !src[2])) {
867  if (is16BPS(c->dstFormat) || isNBPS(c->dstFormat)) {
868  fillPlane16(dst[plane], dstStride[plane], length, height, y,
869  plane == 3, desc_dst->comp[plane].depth_minus1,
870  isBE(c->dstFormat));
871  } else {
872  fillPlane(dst[plane], dstStride[plane], length, height, y,
873  (plane == 3) ? 255 : 128);
874  }
875  } else {
876  if(isNBPS(c->srcFormat) || isNBPS(c->dstFormat)
877  || (is16BPS(c->srcFormat) != is16BPS(c->dstFormat))
878  ) {
879  const int src_depth = desc_src->comp[plane].depth_minus1 + 1;
880  const int dst_depth = desc_dst->comp[plane].depth_minus1 + 1;
881  const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;
882  uint16_t *dstPtr2 = (uint16_t*)dstPtr;
883 
884  if (dst_depth == 8) {
885  if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
886  DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, , )
887  } else {
888  DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, av_bswap16, )
889  }
890  } else if (src_depth == 8) {
891  for (i = 0; i < height; i++) {
892  #define COPY816(w)\
893  if(shiftonly){\
894  for (j = 0; j < length; j++)\
895  w(&dstPtr2[j], srcPtr[j]<<(dst_depth-8));\
896  }else{\
897  for (j = 0; j < length; j++)\
898  w(&dstPtr2[j], (srcPtr[j]<<(dst_depth-8)) |\
899  (srcPtr[j]>>(2*8-dst_depth)));\
900  }
901  if(isBE(c->dstFormat)){
902  COPY816(AV_WB16)
903  } else {
904  COPY816(AV_WL16)
905  }
906  dstPtr2 += dstStride[plane]/2;
907  srcPtr += srcStride[plane];
908  }
909  } else if (src_depth <= dst_depth) {
910  int orig_length = length;
911  for (i = 0; i < height; i++) {
912  if(isBE(c->srcFormat) == HAVE_BIGENDIAN &&
913  isBE(c->dstFormat) == HAVE_BIGENDIAN &&
914  shiftonly) {
915  unsigned shift = dst_depth - src_depth;
916  length = orig_length;
917 #if HAVE_FAST_64BIT
918 #define FAST_COPY_UP(shift) \
919  for (j = 0; j < length - 3; j += 4) { \
920  uint64_t v = AV_RN64A(srcPtr2 + j); \
921  AV_WN64A(dstPtr2 + j, v << shift); \
922  } \
923  length &= 3;
924 #else
925 #define FAST_COPY_UP(shift) \
926  for (j = 0; j < length - 1; j += 2) { \
927  uint32_t v = AV_RN32A(srcPtr2 + j); \
928  AV_WN32A(dstPtr2 + j, v << shift); \
929  } \
930  length &= 1;
931 #endif
932  switch (shift)
933  {
934  case 6: FAST_COPY_UP(6); break;
935  case 7: FAST_COPY_UP(7); break;
936  }
937  }
938 #define COPY_UP(r,w) \
939  if(shiftonly){\
940  for (j = 0; j < length; j++){ \
941  unsigned int v= r(&srcPtr2[j]);\
942  w(&dstPtr2[j], v<<(dst_depth-src_depth));\
943  }\
944  }else{\
945  for (j = 0; j < length; j++){ \
946  unsigned int v= r(&srcPtr2[j]);\
947  w(&dstPtr2[j], (v<<(dst_depth-src_depth)) | \
948  (v>>(2*src_depth-dst_depth)));\
949  }\
950  }
951  if(isBE(c->srcFormat)){
952  if(isBE(c->dstFormat)){
953  COPY_UP(AV_RB16, AV_WB16)
954  } else {
955  COPY_UP(AV_RB16, AV_WL16)
956  }
957  } else {
958  if(isBE(c->dstFormat)){
959  COPY_UP(AV_RL16, AV_WB16)
960  } else {
961  COPY_UP(AV_RL16, AV_WL16)
962  }
963  }
964  dstPtr2 += dstStride[plane]/2;
965  srcPtr2 += srcStride[plane]/2;
966  }
967  } else {
968  if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
969  if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
970  DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , )
971  } else {
972  DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , av_bswap16)
973  }
974  }else{
975  if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
976  DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, )
977  } else {
978  DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, av_bswap16)
979  }
980  }
981  }
982  } else if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat) &&
983  isBE(c->srcFormat) != isBE(c->dstFormat)) {
984 
985  for (i = 0; i < height; i++) {
986  for (j = 0; j < length; j++)
987  ((uint16_t *) dstPtr)[j] = av_bswap16(((const uint16_t *) srcPtr)[j]);
988  srcPtr += srcStride[plane];
989  dstPtr += dstStride[plane];
990  }
991  } else if (dstStride[plane] == srcStride[plane] &&
992  srcStride[plane] > 0 && srcStride[plane] == length) {
993  memcpy(dst[plane] + dstStride[plane] * y, src[plane],
994  height * dstStride[plane]);
995  } else {
996  if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat))
997  length *= 2;
998  else if (!desc_src->comp[0].depth_minus1)
999  length >>= 3; // monowhite/black
1000  for (i = 0; i < height; i++) {
1001  memcpy(dstPtr, srcPtr, length);
1002  srcPtr += srcStride[plane];
1003  dstPtr += dstStride[plane];
1004  }
1005  }
1006  }
1007  }
1008  return srcSliceH;
1009 }
1010 
1011 
1012 #define IS_DIFFERENT_ENDIANESS(src_fmt, dst_fmt, pix_fmt) \
1013  ((src_fmt == pix_fmt ## BE && dst_fmt == pix_fmt ## LE) || \
1014  (src_fmt == pix_fmt ## LE && dst_fmt == pix_fmt ## BE))
1015 
1016 
1017 void ff_get_unscaled_swscale(SwsContext *c)
1018 {
1019  const enum AVPixelFormat srcFormat = c->srcFormat;
1020  const enum AVPixelFormat dstFormat = c->dstFormat;
1021  const int flags = c->flags;
1022  const int dstH = c->dstH;
1023  int needsDither;
1024 
1025  needsDither = isAnyRGB(dstFormat) &&
1026  c->dstFormatBpp < 24 &&
1027  (c->dstFormatBpp < c->srcFormatBpp || (!isAnyRGB(srcFormat)));
1028 
1029  /* yv12_to_nv12 */
1030  if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) &&
1031  (dstFormat == AV_PIX_FMT_NV12 || dstFormat == AV_PIX_FMT_NV21)) {
1032  c->swScale = planarToNv12Wrapper;
1033  }
1034  /* yuv2bgr */
1035  if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUV422P ||
1036  srcFormat == AV_PIX_FMT_YUVA420P) && isAnyRGB(dstFormat) &&
1037  !(flags & (SWS_ACCURATE_RND|SWS_ERROR_DIFFUSION)) && !(dstH & 1)) {
1038  c->swScale = ff_yuv2rgb_get_func_ptr(c);
1039  }
1040 
1041  if (srcFormat == AV_PIX_FMT_YUV410P &&
1042  (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&
1043  !(flags & SWS_BITEXACT)) {
1044  c->swScale = yvu9ToYv12Wrapper;
1045  }
1046 
1047  /* bgr24toYV12 */
1048  if (srcFormat == AV_PIX_FMT_BGR24 &&
1049  (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&
1050  !(flags & SWS_ACCURATE_RND))
1051  c->swScale = bgr24ToYv12Wrapper;
1052 
1053  /* RGB/BGR -> RGB/BGR (no dither needed forms) */
1054  if (isAnyRGB(srcFormat) && isAnyRGB(dstFormat) && findRgbConvFn(c)
1055  && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))
1056  c->swScale= rgbToRgbWrapper;
1057 
1058  if ((srcFormat == AV_PIX_FMT_GBRP && dstFormat == AV_PIX_FMT_GBRAP) ||
1059  (srcFormat == AV_PIX_FMT_GBRAP && dstFormat == AV_PIX_FMT_GBRP))
1060  c->swScale = planarRgbToplanarRgbWrapper;
1061 
1062 #define isByteRGB(f) ( \
1063  f == AV_PIX_FMT_RGB32 || \
1064  f == AV_PIX_FMT_RGB32_1 || \
1065  f == AV_PIX_FMT_RGB24 || \
1066  f == AV_PIX_FMT_BGR32 || \
1067  f == AV_PIX_FMT_BGR32_1 || \
1068  f == AV_PIX_FMT_BGR24)
1069 
1070  if (srcFormat == AV_PIX_FMT_GBRP && isPlanar(srcFormat) && isByteRGB(dstFormat))
1071  c->swScale = planarRgbToRgbWrapper;
1072 
1073  if (av_pix_fmt_desc_get(srcFormat)->comp[0].depth_minus1 == 7 &&
1074  isPackedRGB(srcFormat) && dstFormat == AV_PIX_FMT_GBRP)
1075  c->swScale = rgbToPlanarRgbWrapper;
1076 
1077  /* bswap 16 bits per pixel/component packed formats */
1078  if (IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR444) ||
1079  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR48) ||
1080  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGRA64) ||
1081  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR555) ||
1082  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR565) ||
1083  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GRAY16) ||
1084  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP9) ||
1085  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP10) ||
1086  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP12) ||
1087  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP14) ||
1088  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP16) ||
1089  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRAP16) ||
1090  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB444) ||
1091  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB48) ||
1092  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGBA64) ||
1093  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB555) ||
1094  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB565) ||
1095  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_XYZ12) ||
1096  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P9) ||
1097  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P10) ||
1098  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P12) ||
1099  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P14) ||
1100  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P16) ||
1101  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P9) ||
1102  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P10) ||
1103  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P12) ||
1104  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P14) ||
1105  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P16) ||
1106  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P9) ||
1107  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P10) ||
1108  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P12) ||
1109  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P14) ||
1110  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P16))
1111  c->swScale = packed_16bpc_bswap;
1112 
1113  if (usePal(srcFormat) && isByteRGB(dstFormat))
1114  c->swScale = palToRgbWrapper;
1115 
1116  if (srcFormat == AV_PIX_FMT_YUV422P) {
1117  if (dstFormat == AV_PIX_FMT_YUYV422)
1118  c->swScale = yuv422pToYuy2Wrapper;
1119  else if (dstFormat == AV_PIX_FMT_UYVY422)
1120  c->swScale = yuv422pToUyvyWrapper;
1121  }
1122 
1123  /* LQ converters if -sws 0 or -sws 4*/
1124  if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {
1125  /* yv12_to_yuy2 */
1126  if (srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) {
1127  if (dstFormat == AV_PIX_FMT_YUYV422)
1128  c->swScale = planarToYuy2Wrapper;
1129  else if (dstFormat == AV_PIX_FMT_UYVY422)
1130  c->swScale = planarToUyvyWrapper;
1131  }
1132  }
1133  if (srcFormat == AV_PIX_FMT_YUYV422 &&
1134  (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))
1135  c->swScale = yuyvToYuv420Wrapper;
1136  if (srcFormat == AV_PIX_FMT_UYVY422 &&
1137  (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))
1138  c->swScale = uyvyToYuv420Wrapper;
1139  if (srcFormat == AV_PIX_FMT_YUYV422 && dstFormat == AV_PIX_FMT_YUV422P)
1140  c->swScale = yuyvToYuv422Wrapper;
1141  if (srcFormat == AV_PIX_FMT_UYVY422 && dstFormat == AV_PIX_FMT_YUV422P)
1142  c->swScale = uyvyToYuv422Wrapper;
1143 
1144 #define isPlanarGray(x) (isGray(x) && (x) != AV_PIX_FMT_GRAY8A)
1145  /* simple copy */
1146  if ( srcFormat == dstFormat ||
1147  (srcFormat == AV_PIX_FMT_YUVA420P && dstFormat == AV_PIX_FMT_YUV420P) ||
1148  (srcFormat == AV_PIX_FMT_YUV420P && dstFormat == AV_PIX_FMT_YUVA420P) ||
1149  (isPlanarYUV(srcFormat) && isPlanarGray(dstFormat)) ||
1150  (isPlanarYUV(dstFormat) && isPlanarGray(srcFormat)) ||
1151  (isPlanarGray(dstFormat) && isPlanarGray(srcFormat)) ||
1152  (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&
1153  c->chrDstHSubSample == c->chrSrcHSubSample &&
1154  c->chrDstVSubSample == c->chrSrcVSubSample &&
1155  dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&
1156  srcFormat != AV_PIX_FMT_NV12 && srcFormat != AV_PIX_FMT_NV21))
1157  {
1158  if (isPacked(c->srcFormat))
1159  c->swScale = packedCopyWrapper;
1160  else /* Planar YUV or gray */
1161  c->swScale = planarCopyWrapper;
1162  }
1163 
1164  if (ARCH_BFIN)
1165  ff_bfin_get_unscaled_swscale(c);
1166  if (HAVE_ALTIVEC)
1167  ff_swscale_get_unscaled_altivec(c);
1168 }
1169 
1170 /* Convert the palette to the same packed 32-bit format as the palette */
1171 void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst,
1172  int num_pixels, const uint8_t *palette)
1173 {
1174  int i;
1175 
1176  for (i = 0; i < num_pixels; i++)
1177  ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];
1178 }
1179 
1180 /* Palette format: ABCD -> dst format: ABC */
1181 void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst,
1182  int num_pixels, const uint8_t *palette)
1183 {
1184  int i;
1185 
1186  for (i = 0; i < num_pixels; i++) {
1187  //FIXME slow?
1188  dst[0] = palette[src[i] * 4 + 0];
1189  dst[1] = palette[src[i] * 4 + 1];
1190  dst[2] = palette[src[i] * 4 + 2];
1191  dst += 3;
1192  }
1193 }
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