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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, static 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 static 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 gbr16ptopacked16(const uint16_t *src[], int srcStride[],
393  uint8_t *dst, int dstStride, int srcSliceH,
394  int alpha, int swap, int bpp, int width)
395 {
396  int x, h, i;
397  int src_alpha = src[3] != NULL;
398  int scale_high = 16 - bpp, scale_low = (bpp - 8) * 2;
399  for (h = 0; h < srcSliceH; h++) {
400  uint16_t *dest = (uint16_t *)(dst + dstStride * h);
401  uint16_t component;
402 
403  switch(swap) {
404  case 3:
405  if (alpha && !src_alpha) {
406  for (x = 0; x < width; x++) {
407  component = av_bswap16(src[0][x]);
408  *dest++ = av_bswap16(component << scale_high | component >> scale_low);
409  component = av_bswap16(src[1][x]);
410  *dest++ = av_bswap16(component << scale_high | component >> scale_low);
411  component = av_bswap16(src[2][x]);
412  *dest++ = av_bswap16(component << scale_high | component >> scale_low);
413  *dest++ = 0xffff;
414  }
415  } else if (alpha && src_alpha) {
416  for (x = 0; x < width; x++) {
417  component = av_bswap16(src[0][x]);
418  *dest++ = av_bswap16(component << scale_high | component >> scale_low);
419  component = av_bswap16(src[1][x]);
420  *dest++ = av_bswap16(component << scale_high | component >> scale_low);
421  component = av_bswap16(src[2][x]);
422  *dest++ = av_bswap16(component << scale_high | component >> scale_low);
423  component = av_bswap16(src[3][x]);
424  *dest++ = av_bswap16(component << scale_high | component >> scale_low);
425  }
426  } else {
427  for (x = 0; x < width; x++) {
428  component = av_bswap16(src[0][x]);
429  *dest++ = av_bswap16(component << scale_high | component >> scale_low);
430  component = av_bswap16(src[1][x]);
431  *dest++ = av_bswap16(component << scale_high | component >> scale_low);
432  component = av_bswap16(src[2][x]);
433  *dest++ = av_bswap16(component << scale_high | component >> scale_low);
434  }
435  }
436  break;
437  case 2:
438  if (alpha && !src_alpha) {
439  for (x = 0; x < width; x++) {
440  *dest++ = av_bswap16(src[0][x] << scale_high | src[0][x] >> scale_low);
441  *dest++ = av_bswap16(src[1][x] << scale_high | src[1][x] >> scale_low);
442  *dest++ = av_bswap16(src[2][x] << scale_high | src[2][x] >> scale_low);
443  *dest++ = 0xffff;
444  }
445  } else if (alpha && src_alpha) {
446  for (x = 0; x < width; x++) {
447  *dest++ = av_bswap16(src[0][x] << scale_high | src[0][x] >> scale_low);
448  *dest++ = av_bswap16(src[1][x] << scale_high | src[1][x] >> scale_low);
449  *dest++ = av_bswap16(src[2][x] << scale_high | src[2][x] >> scale_low);
450  *dest++ = av_bswap16(src[3][x] << scale_high | src[3][x] >> scale_low);
451  }
452  } else {
453  for (x = 0; x < width; x++) {
454  *dest++ = av_bswap16(src[0][x] << scale_high | src[0][x] >> scale_low);
455  *dest++ = av_bswap16(src[1][x] << scale_high | src[1][x] >> scale_low);
456  *dest++ = av_bswap16(src[2][x] << scale_high | src[2][x] >> scale_low);
457  }
458  }
459  break;
460  case 1:
461  if (alpha && !src_alpha) {
462  for (x = 0; x < width; x++) {
463  *dest++ = av_bswap16(src[0][x]) << scale_high | av_bswap16(src[0][x]) >> scale_low;
464  *dest++ = av_bswap16(src[1][x]) << scale_high | av_bswap16(src[1][x]) >> scale_low;
465  *dest++ = av_bswap16(src[2][x]) << scale_high | av_bswap16(src[2][x]) >> scale_low;
466  *dest++ = 0xffff;
467  }
468  } else if (alpha && src_alpha) {
469  for (x = 0; x < width; x++) {
470  *dest++ = av_bswap16(src[0][x]) << scale_high | av_bswap16(src[0][x]) >> scale_low;
471  *dest++ = av_bswap16(src[1][x]) << scale_high | av_bswap16(src[1][x]) >> scale_low;
472  *dest++ = av_bswap16(src[2][x]) << scale_high | av_bswap16(src[2][x]) >> scale_low;
473  *dest++ = av_bswap16(src[3][x]) << scale_high | av_bswap16(src[3][x]) >> scale_low;
474  }
475  } else {
476  for (x = 0; x < width; x++) {
477  *dest++ = av_bswap16(src[0][x]) << scale_high | av_bswap16(src[0][x]) >> scale_low;
478  *dest++ = av_bswap16(src[1][x]) << scale_high | av_bswap16(src[1][x]) >> scale_low;
479  *dest++ = av_bswap16(src[2][x]) << scale_high | av_bswap16(src[2][x]) >> scale_low;
480  }
481  }
482  break;
483  default:
484  if (alpha && !src_alpha) {
485  for (x = 0; x < width; x++) {
486  *dest++ = src[0][x] << scale_high | src[0][x] >> scale_low;
487  *dest++ = src[1][x] << scale_high | src[1][x] >> scale_low;
488  *dest++ = src[2][x] << scale_high | src[2][x] >> scale_low;
489  *dest++ = 0xffff;
490  }
491  } else if (alpha && src_alpha) {
492  for (x = 0; x < width; x++) {
493  *dest++ = src[0][x] << scale_high | src[0][x] >> scale_low;
494  *dest++ = src[1][x] << scale_high | src[1][x] >> scale_low;
495  *dest++ = src[2][x] << scale_high | src[2][x] >> scale_low;
496  *dest++ = src[3][x] << scale_high | src[3][x] >> scale_low;
497  }
498  } else {
499  for (x = 0; x < width; x++) {
500  *dest++ = src[0][x] << scale_high | src[0][x] >> scale_low;
501  *dest++ = src[1][x] << scale_high | src[1][x] >> scale_low;
502  *dest++ = src[2][x] << scale_high | src[2][x] >> scale_low;
503  }
504  }
505  }
506  for (i = 0; i < 3 + src_alpha; i++)
507  src[i] += srcStride[i] >> 1;
508  }
509 }
510 
511 static int planarRgb16ToRgb16Wrapper(SwsContext *c, const uint8_t *src[],
512  int srcStride[], int srcSliceY, int srcSliceH,
513  uint8_t *dst[], int dstStride[])
514 {
515  const uint16_t *src102[] = { (uint16_t *)src[1], (uint16_t *)src[0], (uint16_t *)src[2], (uint16_t *)src[3] };
516  const uint16_t *src201[] = { (uint16_t *)src[2], (uint16_t *)src[0], (uint16_t *)src[1], (uint16_t *)src[3] };
517  int stride102[] = { srcStride[1], srcStride[0], srcStride[2], srcStride[3] };
518  int stride201[] = { srcStride[2], srcStride[0], srcStride[1], srcStride[3] };
519  const AVPixFmtDescriptor *src_format = av_pix_fmt_desc_get(c->srcFormat);
520  const AVPixFmtDescriptor *dst_format = av_pix_fmt_desc_get(c->dstFormat);
521  int bits_per_sample = src_format->comp[0].depth_minus1 + 1;
522  int swap = 0;
523  if ( HAVE_BIGENDIAN && !(src_format->flags & AV_PIX_FMT_FLAG_BE) ||
524  !HAVE_BIGENDIAN && src_format->flags & AV_PIX_FMT_FLAG_BE)
525  swap++;
526  if ( HAVE_BIGENDIAN && !(dst_format->flags & AV_PIX_FMT_FLAG_BE) ||
527  !HAVE_BIGENDIAN && dst_format->flags & AV_PIX_FMT_FLAG_BE)
528  swap += 2;
529 
530  if ((src_format->flags & (AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB)) !=
531  (AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB) ||
532  bits_per_sample <= 8) {
533  av_log(c, AV_LOG_ERROR, "unsupported planar RGB conversion %s -> %s\n",
534  src_format->name, dst_format->name);
535  return srcSliceH;
536  }
537  switch (c->dstFormat) {
538  case AV_PIX_FMT_BGR48LE:
539  case AV_PIX_FMT_BGR48BE:
540  gbr16ptopacked16(src102, stride102,
541  dst[0] + srcSliceY * dstStride[0], dstStride[0],
542  srcSliceH, 0, swap, bits_per_sample, c->srcW);
543  break;
544  case AV_PIX_FMT_RGB48LE:
545  case AV_PIX_FMT_RGB48BE:
546  gbr16ptopacked16(src201, stride201,
547  dst[0] + srcSliceY * dstStride[0], dstStride[0],
548  srcSliceH, 0, swap, bits_per_sample, c->srcW);
549  break;
550  case AV_PIX_FMT_RGBA64LE:
551  case AV_PIX_FMT_RGBA64BE:
552  gbr16ptopacked16(src201, stride201,
553  dst[0] + srcSliceY * dstStride[0], dstStride[0],
554  srcSliceH, 1, swap, bits_per_sample, c->srcW);
555  break;
556  case AV_PIX_FMT_BGRA64LE:
557  case AV_PIX_FMT_BGRA64BE:
558  gbr16ptopacked16(src102, stride102,
559  dst[0] + srcSliceY * dstStride[0], dstStride[0],
560  srcSliceH, 1, swap, bits_per_sample, c->srcW);
561  break;
562  default:
563  av_log(c, AV_LOG_ERROR,
564  "unsupported planar RGB conversion %s -> %s\n",
565  src_format->name, dst_format->name);
566  }
567 
568  return srcSliceH;
569 }
570 
571 static void gbr24ptopacked24(const uint8_t *src[], int srcStride[],
572  uint8_t *dst, int dstStride, int srcSliceH,
573  int width)
574 {
575  int x, h, i;
576  for (h = 0; h < srcSliceH; h++) {
577  uint8_t *dest = dst + dstStride * h;
578  for (x = 0; x < width; x++) {
579  *dest++ = src[0][x];
580  *dest++ = src[1][x];
581  *dest++ = src[2][x];
582  }
583 
584  for (i = 0; i < 3; i++)
585  src[i] += srcStride[i];
586  }
587 }
588 
589 static void gbr24ptopacked32(const uint8_t *src[], int srcStride[],
590  uint8_t *dst, int dstStride, int srcSliceH,
591  int alpha_first, int width)
592 {
593  int x, h, i;
594  for (h = 0; h < srcSliceH; h++) {
595  uint8_t *dest = dst + dstStride * h;
596 
597  if (alpha_first) {
598  for (x = 0; x < width; x++) {
599  *dest++ = 0xff;
600  *dest++ = src[0][x];
601  *dest++ = src[1][x];
602  *dest++ = src[2][x];
603  }
604  } else {
605  for (x = 0; x < width; x++) {
606  *dest++ = src[0][x];
607  *dest++ = src[1][x];
608  *dest++ = src[2][x];
609  *dest++ = 0xff;
610  }
611  }
612 
613  for (i = 0; i < 3; i++)
614  src[i] += srcStride[i];
615  }
616 }
617 
618 static int planarRgbToRgbWrapper(SwsContext *c, const uint8_t *src[],
619  int srcStride[], int srcSliceY, int srcSliceH,
620  uint8_t *dst[], int dstStride[])
621 {
622  int alpha_first = 0;
623  const uint8_t *src102[] = { src[1], src[0], src[2] };
624  const uint8_t *src201[] = { src[2], src[0], src[1] };
625  int stride102[] = { srcStride[1], srcStride[0], srcStride[2] };
626  int stride201[] = { srcStride[2], srcStride[0], srcStride[1] };
627 
628  if (c->srcFormat != AV_PIX_FMT_GBRP) {
629  av_log(c, AV_LOG_ERROR, "unsupported planar RGB conversion %s -> %s\n",
630  av_get_pix_fmt_name(c->srcFormat),
631  av_get_pix_fmt_name(c->dstFormat));
632  return srcSliceH;
633  }
634 
635  switch (c->dstFormat) {
636  case AV_PIX_FMT_BGR24:
637  gbr24ptopacked24(src102, stride102,
638  dst[0] + srcSliceY * dstStride[0], dstStride[0],
639  srcSliceH, c->srcW);
640  break;
641 
642  case AV_PIX_FMT_RGB24:
643  gbr24ptopacked24(src201, stride201,
644  dst[0] + srcSliceY * dstStride[0], dstStride[0],
645  srcSliceH, c->srcW);
646  break;
647 
648  case AV_PIX_FMT_ARGB:
649  alpha_first = 1;
650  case AV_PIX_FMT_RGBA:
651  gbr24ptopacked32(src201, stride201,
652  dst[0] + srcSliceY * dstStride[0], dstStride[0],
653  srcSliceH, alpha_first, c->srcW);
654  break;
655 
656  case AV_PIX_FMT_ABGR:
657  alpha_first = 1;
658  case AV_PIX_FMT_BGRA:
659  gbr24ptopacked32(src102, stride102,
660  dst[0] + srcSliceY * dstStride[0], dstStride[0],
661  srcSliceH, alpha_first, c->srcW);
662  break;
663 
664  default:
665  av_log(c, AV_LOG_ERROR,
666  "unsupported planar RGB conversion %s -> %s\n",
667  av_get_pix_fmt_name(c->srcFormat),
668  av_get_pix_fmt_name(c->dstFormat));
669  }
670 
671  return srcSliceH;
672 }
673 
674 static int planarRgbToplanarRgbWrapper(SwsContext *c, const uint8_t *src[],
675  int srcStride[], int srcSliceY, int srcSliceH,
676  uint8_t *dst[], int dstStride[])
677 {
678  copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
679  dst[0], dstStride[0]);
680  copyPlane(src[1], srcStride[1], srcSliceY, srcSliceH, c->srcW,
681  dst[1], dstStride[1]);
682  copyPlane(src[2], srcStride[2], srcSliceY, srcSliceH, c->srcW,
683  dst[2], dstStride[2]);
684  if (dst[3])
685  fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
686 
687  return srcSliceH;
688 }
689 
690 static void packedtogbr24p(const uint8_t *src, int srcStride,
691  uint8_t *dst[], int dstStride[], int srcSliceH,
692  int alpha_first, int inc_size, int width)
693 {
694  uint8_t *dest[3];
695  int x, h;
696 
697  dest[0] = dst[0];
698  dest[1] = dst[1];
699  dest[2] = dst[2];
700 
701  if (alpha_first)
702  src++;
703 
704  for (h = 0; h < srcSliceH; h++) {
705  for (x = 0; x < width; x++) {
706  dest[0][x] = src[0];
707  dest[1][x] = src[1];
708  dest[2][x] = src[2];
709 
710  src += inc_size;
711  }
712  src += srcStride - width * inc_size;
713  dest[0] += dstStride[0];
714  dest[1] += dstStride[1];
715  dest[2] += dstStride[2];
716  }
717 }
718 
719 static int rgbToPlanarRgbWrapper(SwsContext *c, const uint8_t *src[],
720  int srcStride[], int srcSliceY, int srcSliceH,
721  uint8_t *dst[], int dstStride[])
722 {
723  int alpha_first = 0;
724  int stride102[] = { dstStride[1], dstStride[0], dstStride[2] };
725  int stride201[] = { dstStride[2], dstStride[0], dstStride[1] };
726  uint8_t *dst102[] = { dst[1] + srcSliceY * dstStride[1],
727  dst[0] + srcSliceY * dstStride[0],
728  dst[2] + srcSliceY * dstStride[2] };
729  uint8_t *dst201[] = { dst[2] + srcSliceY * dstStride[2],
730  dst[0] + srcSliceY * dstStride[0],
731  dst[1] + srcSliceY * dstStride[1] };
732 
733  switch (c->srcFormat) {
734  case AV_PIX_FMT_RGB24:
735  packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst201,
736  stride201, srcSliceH, alpha_first, 3, c->srcW);
737  break;
738  case AV_PIX_FMT_BGR24:
739  packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst102,
740  stride102, srcSliceH, alpha_first, 3, c->srcW);
741  break;
742  case AV_PIX_FMT_ARGB:
743  alpha_first = 1;
744  case AV_PIX_FMT_RGBA:
745  packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst201,
746  stride201, srcSliceH, alpha_first, 4, c->srcW);
747  break;
748  case AV_PIX_FMT_ABGR:
749  alpha_first = 1;
750  case AV_PIX_FMT_BGRA:
751  packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst102,
752  stride102, srcSliceH, alpha_first, 4, c->srcW);
753  break;
754  default:
755  av_log(c, AV_LOG_ERROR,
756  "unsupported planar RGB conversion %s -> %s\n",
757  av_get_pix_fmt_name(c->srcFormat),
758  av_get_pix_fmt_name(c->dstFormat));
759  }
760 
761  return srcSliceH;
762 }
763 
764 #define isRGBA32(x) ( \
765  (x) == AV_PIX_FMT_ARGB \
766  || (x) == AV_PIX_FMT_RGBA \
767  || (x) == AV_PIX_FMT_BGRA \
768  || (x) == AV_PIX_FMT_ABGR \
769  )
770 
771 #define isRGBA64(x) ( \
772  (x) == AV_PIX_FMT_RGBA64LE \
773  || (x) == AV_PIX_FMT_RGBA64BE \
774  || (x) == AV_PIX_FMT_BGRA64LE \
775  || (x) == AV_PIX_FMT_BGRA64BE \
776  )
777 
778 #define isRGB48(x) ( \
779  (x) == AV_PIX_FMT_RGB48LE \
780  || (x) == AV_PIX_FMT_RGB48BE \
781  || (x) == AV_PIX_FMT_BGR48LE \
782  || (x) == AV_PIX_FMT_BGR48BE \
783  )
784 
785 /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
786 typedef void (* rgbConvFn) (const uint8_t *, uint8_t *, int);
787 static rgbConvFn findRgbConvFn(SwsContext *c)
788 {
789  const enum AVPixelFormat srcFormat = c->srcFormat;
790  const enum AVPixelFormat dstFormat = c->dstFormat;
791  const int srcId = c->srcFormatBpp;
792  const int dstId = c->dstFormatBpp;
793  rgbConvFn conv = NULL;
794 
795 #define IS_NOT_NE(bpp, desc) \
796  (((bpp + 7) >> 3) == 2 && \
797  (!(desc->flags & AV_PIX_FMT_FLAG_BE) != !HAVE_BIGENDIAN))
798 
799 #define CONV_IS(src, dst) (srcFormat == AV_PIX_FMT_##src && dstFormat == AV_PIX_FMT_##dst)
800 
801  if (isRGBA32(srcFormat) && isRGBA32(dstFormat)) {
802  if ( CONV_IS(ABGR, RGBA)
803  || CONV_IS(ARGB, BGRA)
804  || CONV_IS(BGRA, ARGB)
805  || CONV_IS(RGBA, ABGR)) conv = shuffle_bytes_3210;
806  else if (CONV_IS(ABGR, ARGB)
807  || CONV_IS(ARGB, ABGR)) conv = shuffle_bytes_0321;
808  else if (CONV_IS(ABGR, BGRA)
809  || CONV_IS(ARGB, RGBA)) conv = shuffle_bytes_1230;
810  else if (CONV_IS(BGRA, RGBA)
811  || CONV_IS(RGBA, BGRA)) conv = shuffle_bytes_2103;
812  else if (CONV_IS(BGRA, ABGR)
813  || CONV_IS(RGBA, ARGB)) conv = shuffle_bytes_3012;
814  } else if (isRGB48(srcFormat) && isRGB48(dstFormat)) {
815  if (CONV_IS(RGB48LE, BGR48LE)
816  || CONV_IS(BGR48LE, RGB48LE)
817  || CONV_IS(RGB48BE, BGR48BE)
818  || CONV_IS(BGR48BE, RGB48BE)) conv = rgb48tobgr48_nobswap;
819  else if (CONV_IS(RGB48LE, BGR48BE)
820  || CONV_IS(BGR48LE, RGB48BE)
821  || CONV_IS(RGB48BE, BGR48LE)
822  || CONV_IS(BGR48BE, RGB48LE)) conv = rgb48tobgr48_bswap;
823  } else if (isRGBA64(srcFormat) && isRGB48(dstFormat)) {
824  if (CONV_IS(RGBA64LE, BGR48LE)
825  || CONV_IS(BGRA64LE, RGB48LE)
826  || CONV_IS(RGBA64BE, BGR48BE)
827  || CONV_IS(BGRA64BE, RGB48BE)) conv = rgb64tobgr48_nobswap;
828  else if (CONV_IS(RGBA64LE, BGR48BE)
829  || CONV_IS(BGRA64LE, RGB48BE)
830  || CONV_IS(RGBA64BE, BGR48LE)
831  || CONV_IS(BGRA64BE, RGB48LE)) conv = rgb64tobgr48_bswap;
832  else if (CONV_IS(RGBA64LE, RGB48LE)
833  || CONV_IS(BGRA64LE, BGR48LE)
834  || CONV_IS(RGBA64BE, RGB48BE)
835  || CONV_IS(BGRA64BE, BGR48BE)) conv = rgb64to48_nobswap;
836  else if (CONV_IS(RGBA64LE, RGB48BE)
837  || CONV_IS(BGRA64LE, BGR48BE)
838  || CONV_IS(RGBA64BE, RGB48LE)
839  || CONV_IS(BGRA64BE, BGR48LE)) conv = rgb64to48_bswap;
840  } else
841  /* BGR -> BGR */
842  if ((isBGRinInt(srcFormat) && isBGRinInt(dstFormat)) ||
843  (isRGBinInt(srcFormat) && isRGBinInt(dstFormat))) {
844  switch (srcId | (dstId << 16)) {
845  case 0x000F000C: conv = rgb12to15; break;
846  case 0x000F0010: conv = rgb16to15; break;
847  case 0x000F0018: conv = rgb24to15; break;
848  case 0x000F0020: conv = rgb32to15; break;
849  case 0x0010000F: conv = rgb15to16; break;
850  case 0x00100018: conv = rgb24to16; break;
851  case 0x00100020: conv = rgb32to16; break;
852  case 0x0018000F: conv = rgb15to24; break;
853  case 0x00180010: conv = rgb16to24; break;
854  case 0x00180020: conv = rgb32to24; break;
855  case 0x0020000F: conv = rgb15to32; break;
856  case 0x00200010: conv = rgb16to32; break;
857  case 0x00200018: conv = rgb24to32; break;
858  }
859  } else if ((isBGRinInt(srcFormat) && isRGBinInt(dstFormat)) ||
860  (isRGBinInt(srcFormat) && isBGRinInt(dstFormat))) {
861  switch (srcId | (dstId << 16)) {
862  case 0x000C000C: conv = rgb12tobgr12; break;
863  case 0x000F000F: conv = rgb15tobgr15; break;
864  case 0x000F0010: conv = rgb16tobgr15; break;
865  case 0x000F0018: conv = rgb24tobgr15; break;
866  case 0x000F0020: conv = rgb32tobgr15; break;
867  case 0x0010000F: conv = rgb15tobgr16; break;
868  case 0x00100010: conv = rgb16tobgr16; break;
869  case 0x00100018: conv = rgb24tobgr16; break;
870  case 0x00100020: conv = rgb32tobgr16; break;
871  case 0x0018000F: conv = rgb15tobgr24; break;
872  case 0x00180010: conv = rgb16tobgr24; break;
873  case 0x00180018: conv = rgb24tobgr24; break;
874  case 0x00180020: conv = rgb32tobgr24; break;
875  case 0x0020000F: conv = rgb15tobgr32; break;
876  case 0x00200010: conv = rgb16tobgr32; break;
877  case 0x00200018: conv = rgb24tobgr32; break;
878  }
879  }
880 
881  if ((dstFormat == AV_PIX_FMT_RGB32_1 || dstFormat == AV_PIX_FMT_BGR32_1) && !isRGBA32(srcFormat) && ALT32_CORR<0)
882  return NULL;
883 
884  return conv;
885 }
886 
887 /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
888 static int rgbToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
889  int srcSliceY, int srcSliceH, uint8_t *dst[],
890  int dstStride[])
891 
892 {
893  const enum AVPixelFormat srcFormat = c->srcFormat;
894  const enum AVPixelFormat dstFormat = c->dstFormat;
895  const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat);
896  const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat);
897  const int srcBpp = (c->srcFormatBpp + 7) >> 3;
898  const int dstBpp = (c->dstFormatBpp + 7) >> 3;
899  rgbConvFn conv = findRgbConvFn(c);
900 
901  if (!conv) {
902  av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
903  av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
904  } else {
905  const uint8_t *srcPtr = src[0];
906  uint8_t *dstPtr = dst[0];
907  int src_bswap = IS_NOT_NE(c->srcFormatBpp, desc_src);
908  int dst_bswap = IS_NOT_NE(c->dstFormatBpp, desc_dst);
909 
910  if ((srcFormat == AV_PIX_FMT_RGB32_1 || srcFormat == AV_PIX_FMT_BGR32_1) &&
911  !isRGBA32(dstFormat))
912  srcPtr += ALT32_CORR;
913 
914  if ((dstFormat == AV_PIX_FMT_RGB32_1 || dstFormat == AV_PIX_FMT_BGR32_1) &&
915  !isRGBA32(srcFormat)) {
916  int i;
917  av_assert0(ALT32_CORR == 1);
918  for (i = 0; i < srcSliceH; i++)
919  dstPtr[dstStride[0] * (srcSliceY + i)] = 255;
920  dstPtr += ALT32_CORR;
921  }
922 
923  if (dstStride[0] * srcBpp == srcStride[0] * dstBpp && srcStride[0] > 0 &&
924  !(srcStride[0] % srcBpp) && !dst_bswap && !src_bswap)
925  conv(srcPtr, dstPtr + dstStride[0] * srcSliceY,
926  srcSliceH * srcStride[0]);
927  else {
928  int i, j;
929  dstPtr += dstStride[0] * srcSliceY;
930 
931  for (i = 0; i < srcSliceH; i++) {
932  if(src_bswap) {
933  for(j=0; j<c->srcW; j++)
934  ((uint16_t*)c->formatConvBuffer)[j] = av_bswap16(((uint16_t*)srcPtr)[j]);
935  conv(c->formatConvBuffer, dstPtr, c->srcW * srcBpp);
936  }else
937  conv(srcPtr, dstPtr, c->srcW * srcBpp);
938  if(dst_bswap)
939  for(j=0; j<c->srcW; j++)
940  ((uint16_t*)dstPtr)[j] = av_bswap16(((uint16_t*)dstPtr)[j]);
941  srcPtr += srcStride[0];
942  dstPtr += dstStride[0];
943  }
944  }
945  }
946  return srcSliceH;
947 }
948 
949 static int bgr24ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
950  int srcStride[], int srcSliceY, int srcSliceH,
951  uint8_t *dst[], int dstStride[])
952 {
953  ff_rgb24toyv12(
954  src[0],
955  dst[0] + srcSliceY * dstStride[0],
956  dst[1] + (srcSliceY >> 1) * dstStride[1],
957  dst[2] + (srcSliceY >> 1) * dstStride[2],
958  c->srcW, srcSliceH,
959  dstStride[0], dstStride[1], srcStride[0],
960  c->input_rgb2yuv_table);
961  if (dst[3])
962  fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
963  return srcSliceH;
964 }
965 
966 static int yvu9ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
967  int srcStride[], int srcSliceY, int srcSliceH,
968  uint8_t *dst[], int dstStride[])
969 {
970  copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
971  dst[0], dstStride[0]);
972 
973  planar2x(src[1], dst[1] + dstStride[1] * (srcSliceY >> 1), c->chrSrcW,
974  srcSliceH >> 2, srcStride[1], dstStride[1]);
975  planar2x(src[2], dst[2] + dstStride[2] * (srcSliceY >> 1), c->chrSrcW,
976  srcSliceH >> 2, srcStride[2], dstStride[2]);
977  if (dst[3])
978  fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
979  return srcSliceH;
980 }
981 
982 /* unscaled copy like stuff (assumes nearly identical formats) */
983 static int packedCopyWrapper(SwsContext *c, const uint8_t *src[],
984  int srcStride[], int srcSliceY, int srcSliceH,
985  uint8_t *dst[], int dstStride[])
986 {
987  if (dstStride[0] == srcStride[0] && srcStride[0] > 0)
988  memcpy(dst[0] + dstStride[0] * srcSliceY, src[0], srcSliceH * dstStride[0]);
989  else {
990  int i;
991  const uint8_t *srcPtr = src[0];
992  uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
993  int length = 0;
994 
995  /* universal length finder */
996  while (length + c->srcW <= FFABS(dstStride[0]) &&
997  length + c->srcW <= FFABS(srcStride[0]))
998  length += c->srcW;
999  av_assert1(length != 0);
1000 
1001  for (i = 0; i < srcSliceH; i++) {
1002  memcpy(dstPtr, srcPtr, length);
1003  srcPtr += srcStride[0];
1004  dstPtr += dstStride[0];
1005  }
1006  }
1007  return srcSliceH;
1008 }
1009 
1010 #define DITHER_COPY(dst, dstStride, src, srcStride, bswap, dbswap)\
1011  uint16_t scale= dither_scale[dst_depth-1][src_depth-1];\
1012  int shift= src_depth-dst_depth + dither_scale[src_depth-2][dst_depth-1];\
1013  for (i = 0; i < height; i++) {\
1014  const uint8_t *dither= dithers[src_depth-9][i&7];\
1015  for (j = 0; j < length-7; j+=8){\
1016  dst[j+0] = dbswap((bswap(src[j+0]) + dither[0])*scale>>shift);\
1017  dst[j+1] = dbswap((bswap(src[j+1]) + dither[1])*scale>>shift);\
1018  dst[j+2] = dbswap((bswap(src[j+2]) + dither[2])*scale>>shift);\
1019  dst[j+3] = dbswap((bswap(src[j+3]) + dither[3])*scale>>shift);\
1020  dst[j+4] = dbswap((bswap(src[j+4]) + dither[4])*scale>>shift);\
1021  dst[j+5] = dbswap((bswap(src[j+5]) + dither[5])*scale>>shift);\
1022  dst[j+6] = dbswap((bswap(src[j+6]) + dither[6])*scale>>shift);\
1023  dst[j+7] = dbswap((bswap(src[j+7]) + dither[7])*scale>>shift);\
1024  }\
1025  for (; j < length; j++)\
1026  dst[j] = dbswap((bswap(src[j]) + dither[j&7])*scale>>shift);\
1027  dst += dstStride;\
1028  src += srcStride;\
1029  }
1030 
1031 static int planarCopyWrapper(SwsContext *c, const uint8_t *src[],
1032  int srcStride[], int srcSliceY, int srcSliceH,
1033  uint8_t *dst[], int dstStride[])
1034 {
1035  const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat);
1036  const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat);
1037  int plane, i, j;
1038  for (plane = 0; plane < 4; plane++) {
1039  int length = (plane == 0 || plane == 3) ? c->srcW : FF_CEIL_RSHIFT(c->srcW, c->chrDstHSubSample);
1040  int y = (plane == 0 || plane == 3) ? srcSliceY: FF_CEIL_RSHIFT(srcSliceY, c->chrDstVSubSample);
1041  int height = (plane == 0 || plane == 3) ? srcSliceH: FF_CEIL_RSHIFT(srcSliceH, c->chrDstVSubSample);
1042  const uint8_t *srcPtr = src[plane];
1043  uint8_t *dstPtr = dst[plane] + dstStride[plane] * y;
1044  int shiftonly= plane==1 || plane==2 || (!c->srcRange && plane==0);
1045 
1046  if (!dst[plane])
1047  continue;
1048  // ignore palette for GRAY8
1049  if (plane == 1 && !dst[2]) continue;
1050  if (!src[plane] || (plane == 1 && !src[2])) {
1051  if (is16BPS(c->dstFormat) || isNBPS(c->dstFormat)) {
1052  fillPlane16(dst[plane], dstStride[plane], length, height, y,
1053  plane == 3, desc_dst->comp[plane].depth_minus1,
1054  isBE(c->dstFormat));
1055  } else {
1056  fillPlane(dst[plane], dstStride[plane], length, height, y,
1057  (plane == 3) ? 255 : 128);
1058  }
1059  } else {
1060  if(isNBPS(c->srcFormat) || isNBPS(c->dstFormat)
1061  || (is16BPS(c->srcFormat) != is16BPS(c->dstFormat))
1062  ) {
1063  const int src_depth = desc_src->comp[plane].depth_minus1 + 1;
1064  const int dst_depth = desc_dst->comp[plane].depth_minus1 + 1;
1065  const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;
1066  uint16_t *dstPtr2 = (uint16_t*)dstPtr;
1067 
1068  if (dst_depth == 8) {
1069  if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
1070  DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, , )
1071  } else {
1072  DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, av_bswap16, )
1073  }
1074  } else if (src_depth == 8) {
1075  for (i = 0; i < height; i++) {
1076  #define COPY816(w)\
1077  if(shiftonly){\
1078  for (j = 0; j < length; j++)\
1079  w(&dstPtr2[j], srcPtr[j]<<(dst_depth-8));\
1080  }else{\
1081  for (j = 0; j < length; j++)\
1082  w(&dstPtr2[j], (srcPtr[j]<<(dst_depth-8)) |\
1083  (srcPtr[j]>>(2*8-dst_depth)));\
1084  }
1085  if(isBE(c->dstFormat)){
1086  COPY816(AV_WB16)
1087  } else {
1088  COPY816(AV_WL16)
1089  }
1090  dstPtr2 += dstStride[plane]/2;
1091  srcPtr += srcStride[plane];
1092  }
1093  } else if (src_depth <= dst_depth) {
1094  int orig_length = length;
1095  for (i = 0; i < height; i++) {
1096  if(isBE(c->srcFormat) == HAVE_BIGENDIAN &&
1097  isBE(c->dstFormat) == HAVE_BIGENDIAN &&
1098  shiftonly) {
1099  unsigned shift = dst_depth - src_depth;
1100  length = orig_length;
1101 #if HAVE_FAST_64BIT
1102 #define FAST_COPY_UP(shift) \
1103  for (j = 0; j < length - 3; j += 4) { \
1104  uint64_t v = AV_RN64A(srcPtr2 + j); \
1105  AV_WN64A(dstPtr2 + j, v << shift); \
1106  } \
1107  length &= 3;
1108 #else
1109 #define FAST_COPY_UP(shift) \
1110  for (j = 0; j < length - 1; j += 2) { \
1111  uint32_t v = AV_RN32A(srcPtr2 + j); \
1112  AV_WN32A(dstPtr2 + j, v << shift); \
1113  } \
1114  length &= 1;
1115 #endif
1116  switch (shift)
1117  {
1118  case 6: FAST_COPY_UP(6); break;
1119  case 7: FAST_COPY_UP(7); break;
1120  }
1121  }
1122 #define COPY_UP(r,w) \
1123  if(shiftonly){\
1124  for (j = 0; j < length; j++){ \
1125  unsigned int v= r(&srcPtr2[j]);\
1126  w(&dstPtr2[j], v<<(dst_depth-src_depth));\
1127  }\
1128  }else{\
1129  for (j = 0; j < length; j++){ \
1130  unsigned int v= r(&srcPtr2[j]);\
1131  w(&dstPtr2[j], (v<<(dst_depth-src_depth)) | \
1132  (v>>(2*src_depth-dst_depth)));\
1133  }\
1134  }
1135  if(isBE(c->srcFormat)){
1136  if(isBE(c->dstFormat)){
1137  COPY_UP(AV_RB16, AV_WB16)
1138  } else {
1139  COPY_UP(AV_RB16, AV_WL16)
1140  }
1141  } else {
1142  if(isBE(c->dstFormat)){
1143  COPY_UP(AV_RL16, AV_WB16)
1144  } else {
1145  COPY_UP(AV_RL16, AV_WL16)
1146  }
1147  }
1148  dstPtr2 += dstStride[plane]/2;
1149  srcPtr2 += srcStride[plane]/2;
1150  }
1151  } else {
1152  if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
1153  if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
1154  DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , )
1155  } else {
1156  DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , av_bswap16)
1157  }
1158  }else{
1159  if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
1160  DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, )
1161  } else {
1162  DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, av_bswap16)
1163  }
1164  }
1165  }
1166  } else if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat) &&
1167  isBE(c->srcFormat) != isBE(c->dstFormat)) {
1168 
1169  for (i = 0; i < height; i++) {
1170  for (j = 0; j < length; j++)
1171  ((uint16_t *) dstPtr)[j] = av_bswap16(((const uint16_t *) srcPtr)[j]);
1172  srcPtr += srcStride[plane];
1173  dstPtr += dstStride[plane];
1174  }
1175  } else if (dstStride[plane] == srcStride[plane] &&
1176  srcStride[plane] > 0 && srcStride[plane] == length) {
1177  memcpy(dst[plane] + dstStride[plane] * y, src[plane],
1178  height * dstStride[plane]);
1179  } else {
1180  if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat))
1181  length *= 2;
1182  else if (!desc_src->comp[0].depth_minus1)
1183  length >>= 3; // monowhite/black
1184  for (i = 0; i < height; i++) {
1185  memcpy(dstPtr, srcPtr, length);
1186  srcPtr += srcStride[plane];
1187  dstPtr += dstStride[plane];
1188  }
1189  }
1190  }
1191  }
1192  return srcSliceH;
1193 }
1194 
1195 
1196 #define IS_DIFFERENT_ENDIANESS(src_fmt, dst_fmt, pix_fmt) \
1197  ((src_fmt == pix_fmt ## BE && dst_fmt == pix_fmt ## LE) || \
1198  (src_fmt == pix_fmt ## LE && dst_fmt == pix_fmt ## BE))
1199 
1200 
1201 void ff_get_unscaled_swscale(SwsContext *c)
1202 {
1203  const enum AVPixelFormat srcFormat = c->srcFormat;
1204  const enum AVPixelFormat dstFormat = c->dstFormat;
1205  const int flags = c->flags;
1206  const int dstH = c->dstH;
1207  int needsDither;
1208 
1209  needsDither = isAnyRGB(dstFormat) &&
1210  c->dstFormatBpp < 24 &&
1211  (c->dstFormatBpp < c->srcFormatBpp || (!isAnyRGB(srcFormat)));
1212 
1213  /* yv12_to_nv12 */
1214  if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) &&
1215  (dstFormat == AV_PIX_FMT_NV12 || dstFormat == AV_PIX_FMT_NV21)) {
1216  c->swscale = planarToNv12Wrapper;
1217  }
1218  /* yuv2bgr */
1219  if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUV422P ||
1220  srcFormat == AV_PIX_FMT_YUVA420P) && isAnyRGB(dstFormat) &&
1221  !(flags & SWS_ACCURATE_RND) && (c->dither == SWS_DITHER_BAYER || c->dither == SWS_DITHER_AUTO) && !(dstH & 1)) {
1222  c->swscale = ff_yuv2rgb_get_func_ptr(c);
1223  }
1224 
1225  if (srcFormat == AV_PIX_FMT_YUV410P &&
1226  (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&
1227  !(flags & SWS_BITEXACT)) {
1228  c->swscale = yvu9ToYv12Wrapper;
1229  }
1230 
1231  /* bgr24toYV12 */
1232  if (srcFormat == AV_PIX_FMT_BGR24 &&
1233  (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&
1234  !(flags & SWS_ACCURATE_RND))
1235  c->swscale = bgr24ToYv12Wrapper;
1236 
1237  /* RGB/BGR -> RGB/BGR (no dither needed forms) */
1238  if (isAnyRGB(srcFormat) && isAnyRGB(dstFormat) && findRgbConvFn(c)
1239  && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))
1240  c->swscale = rgbToRgbWrapper;
1241 
1242  if ((srcFormat == AV_PIX_FMT_GBRP && dstFormat == AV_PIX_FMT_GBRAP) ||
1243  (srcFormat == AV_PIX_FMT_GBRAP && dstFormat == AV_PIX_FMT_GBRP))
1244  c->swscale = planarRgbToplanarRgbWrapper;
1245 
1246 #define isByteRGB(f) ( \
1247  f == AV_PIX_FMT_RGB32 || \
1248  f == AV_PIX_FMT_RGB32_1 || \
1249  f == AV_PIX_FMT_RGB24 || \
1250  f == AV_PIX_FMT_BGR32 || \
1251  f == AV_PIX_FMT_BGR32_1 || \
1252  f == AV_PIX_FMT_BGR24)
1253 
1254  if (srcFormat == AV_PIX_FMT_GBRP && isPlanar(srcFormat) && isByteRGB(dstFormat))
1255  c->swscale = planarRgbToRgbWrapper;
1256 
1257  if ((srcFormat == AV_PIX_FMT_GBRP9LE || srcFormat == AV_PIX_FMT_GBRP9BE ||
1258  srcFormat == AV_PIX_FMT_GBRP16LE || srcFormat == AV_PIX_FMT_GBRP16BE ||
1259  srcFormat == AV_PIX_FMT_GBRP10LE || srcFormat == AV_PIX_FMT_GBRP10BE ||
1260  srcFormat == AV_PIX_FMT_GBRP12LE || srcFormat == AV_PIX_FMT_GBRP12BE ||
1261  srcFormat == AV_PIX_FMT_GBRP14LE || srcFormat == AV_PIX_FMT_GBRP14BE ||
1262  srcFormat == AV_PIX_FMT_GBRAP16LE || srcFormat == AV_PIX_FMT_GBRAP16BE) &&
1263  (dstFormat == AV_PIX_FMT_RGB48LE || dstFormat == AV_PIX_FMT_RGB48BE ||
1264  dstFormat == AV_PIX_FMT_BGR48LE || dstFormat == AV_PIX_FMT_BGR48BE ||
1265  dstFormat == AV_PIX_FMT_RGBA64LE || dstFormat == AV_PIX_FMT_RGBA64BE ||
1266  dstFormat == AV_PIX_FMT_BGRA64LE || dstFormat == AV_PIX_FMT_BGRA64BE))
1267  c->swscale = planarRgb16ToRgb16Wrapper;
1268 
1269  if (av_pix_fmt_desc_get(srcFormat)->comp[0].depth_minus1 == 7 &&
1270  isPackedRGB(srcFormat) && dstFormat == AV_PIX_FMT_GBRP)
1271  c->swscale = rgbToPlanarRgbWrapper;
1272 
1273  /* bswap 16 bits per pixel/component packed formats */
1274  if (IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR444) ||
1275  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR48) ||
1276  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGRA64) ||
1277  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR555) ||
1278  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR565) ||
1279  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GRAY16) ||
1280  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP9) ||
1281  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP10) ||
1282  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP12) ||
1283  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP14) ||
1284  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRP16) ||
1285  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GBRAP16) ||
1286  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB444) ||
1287  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB48) ||
1288  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGBA64) ||
1289  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB555) ||
1290  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB565) ||
1291  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_XYZ12) ||
1292  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P9) ||
1293  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P10) ||
1294  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P12) ||
1295  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P14) ||
1296  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV420P16) ||
1297  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P9) ||
1298  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P10) ||
1299  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P12) ||
1300  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P14) ||
1301  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV422P16) ||
1302  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P9) ||
1303  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P10) ||
1304  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P12) ||
1305  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P14) ||
1306  IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_YUV444P16))
1307  c->swscale = packed_16bpc_bswap;
1308 
1309  if (usePal(srcFormat) && isByteRGB(dstFormat))
1310  c->swscale = palToRgbWrapper;
1311 
1312  if (srcFormat == AV_PIX_FMT_YUV422P) {
1313  if (dstFormat == AV_PIX_FMT_YUYV422)
1314  c->swscale = yuv422pToYuy2Wrapper;
1315  else if (dstFormat == AV_PIX_FMT_UYVY422)
1316  c->swscale = yuv422pToUyvyWrapper;
1317  }
1318 
1319  /* LQ converters if -sws 0 or -sws 4*/
1320  if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {
1321  /* yv12_to_yuy2 */
1322  if (srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) {
1323  if (dstFormat == AV_PIX_FMT_YUYV422)
1324  c->swscale = planarToYuy2Wrapper;
1325  else if (dstFormat == AV_PIX_FMT_UYVY422)
1326  c->swscale = planarToUyvyWrapper;
1327  }
1328  }
1329  if (srcFormat == AV_PIX_FMT_YUYV422 &&
1330  (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))
1331  c->swscale = yuyvToYuv420Wrapper;
1332  if (srcFormat == AV_PIX_FMT_UYVY422 &&
1333  (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))
1334  c->swscale = uyvyToYuv420Wrapper;
1335  if (srcFormat == AV_PIX_FMT_YUYV422 && dstFormat == AV_PIX_FMT_YUV422P)
1336  c->swscale = yuyvToYuv422Wrapper;
1337  if (srcFormat == AV_PIX_FMT_UYVY422 && dstFormat == AV_PIX_FMT_YUV422P)
1338  c->swscale = uyvyToYuv422Wrapper;
1339 
1340 #define isPlanarGray(x) (isGray(x) && (x) != AV_PIX_FMT_GRAY8A)
1341  /* simple copy */
1342  if ( srcFormat == dstFormat ||
1343  (srcFormat == AV_PIX_FMT_YUVA420P && dstFormat == AV_PIX_FMT_YUV420P) ||
1344  (srcFormat == AV_PIX_FMT_YUV420P && dstFormat == AV_PIX_FMT_YUVA420P) ||
1345  (isPlanarYUV(srcFormat) && isPlanarGray(dstFormat)) ||
1346  (isPlanarYUV(dstFormat) && isPlanarGray(srcFormat)) ||
1347  (isPlanarGray(dstFormat) && isPlanarGray(srcFormat)) ||
1348  (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&
1349  c->chrDstHSubSample == c->chrSrcHSubSample &&
1350  c->chrDstVSubSample == c->chrSrcVSubSample &&
1351  dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&
1352  srcFormat != AV_PIX_FMT_NV12 && srcFormat != AV_PIX_FMT_NV21))
1353  {
1354  if (isPacked(c->srcFormat))
1355  c->swscale = packedCopyWrapper;
1356  else /* Planar YUV or gray */
1357  c->swscale = planarCopyWrapper;
1358  }
1359 
1360  if (ARCH_BFIN)
1361  ff_get_unscaled_swscale_bfin(c);
1362  if (ARCH_PPC)
1363  ff_get_unscaled_swscale_ppc(c);
1364 }
1365 
1366 /* Convert the palette to the same packed 32-bit format as the palette */
1367 void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst,
1368  int num_pixels, const uint8_t *palette)
1369 {
1370  int i;
1371 
1372  for (i = 0; i < num_pixels; i++)
1373  ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];
1374 }
1375 
1376 /* Palette format: ABCD -> dst format: ABC */
1377 void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst,
1378  int num_pixels, const uint8_t *palette)
1379 {
1380  int i;
1381 
1382  for (i = 0; i < num_pixels; i++) {
1383  //FIXME slow?
1384  dst[0] = palette[src[i] * 4 + 0];
1385  dst[1] = palette[src[i] * 4 + 1];
1386  dst[2] = palette[src[i] * 4 + 2];
1387  dst += 3;
1388  }
1389 }
Generated on Sat Jan 25 2014 19:52:07 for FFmpeg by   doxygen 1.8.2