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utils.c
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1 /*
2  * Copyright (C) 2001-2003 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 "config.h"
22 
23 #define _DEFAULT_SOURCE
24 #define _SVID_SOURCE // needed for MAP_ANONYMOUS
25 #define _DARWIN_C_SOURCE // needed for MAP_ANON
26 #include <inttypes.h>
27 #include <math.h>
28 #include <stdio.h>
29 #include <string.h>
30 #if HAVE_SYS_MMAN_H
31 #include <sys/mman.h>
32 #if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
33 #define MAP_ANONYMOUS MAP_ANON
34 #endif
35 #endif
36 #if HAVE_VIRTUALALLOC
37 #define WIN32_LEAN_AND_MEAN
38 #include <windows.h>
39 #endif
40 
41 #include "libavutil/attributes.h"
42 #include "libavutil/avassert.h"
43 #include "libavutil/avutil.h"
44 #include "libavutil/bswap.h"
45 #include "libavutil/cpu.h"
46 #include "libavutil/imgutils.h"
47 #include "libavutil/intreadwrite.h"
48 #include "libavutil/libm.h"
49 #include "libavutil/mathematics.h"
50 #include "libavutil/opt.h"
51 #include "libavutil/pixdesc.h"
52 #include "libavutil/aarch64/cpu.h"
53 #include "libavutil/ppc/cpu.h"
54 #include "libavutil/x86/asm.h"
55 #include "libavutil/x86/cpu.h"
56 
57 // We have to implement deprecated functions until they are removed, this is the
58 // simplest way to prevent warnings
59 #undef attribute_deprecated
60 #define attribute_deprecated
61 
62 #include "rgb2rgb.h"
63 #include "swscale.h"
64 #include "swscale_internal.h"
65 
66 #if !FF_API_SWS_VECTOR
67 static SwsVector *sws_getIdentityVec(void);
68 static void sws_addVec(SwsVector *a, SwsVector *b);
69 static void sws_shiftVec(SwsVector *a, int shift);
70 static void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level);
71 #endif
72 
73 static void handle_formats(SwsContext *c);
74 
75 unsigned swscale_version(void)
76 {
79 }
80 
81 const char *swscale_configuration(void)
82 {
83  return FFMPEG_CONFIGURATION;
84 }
85 
86 const char *swscale_license(void)
87 {
88 #define LICENSE_PREFIX "libswscale license: "
89  return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
90 }
91 
92 typedef struct FormatEntry {
96 } FormatEntry;
97 
99  [AV_PIX_FMT_YUV420P] = { 1, 1 },
100  [AV_PIX_FMT_YUYV422] = { 1, 1 },
101  [AV_PIX_FMT_RGB24] = { 1, 1 },
102  [AV_PIX_FMT_BGR24] = { 1, 1 },
103  [AV_PIX_FMT_YUV422P] = { 1, 1 },
104  [AV_PIX_FMT_YUV444P] = { 1, 1 },
105  [AV_PIX_FMT_YUV410P] = { 1, 1 },
106  [AV_PIX_FMT_YUV411P] = { 1, 1 },
107  [AV_PIX_FMT_GRAY8] = { 1, 1 },
108  [AV_PIX_FMT_MONOWHITE] = { 1, 1 },
109  [AV_PIX_FMT_MONOBLACK] = { 1, 1 },
110  [AV_PIX_FMT_PAL8] = { 1, 0 },
111  [AV_PIX_FMT_YUVJ420P] = { 1, 1 },
112  [AV_PIX_FMT_YUVJ411P] = { 1, 1 },
113  [AV_PIX_FMT_YUVJ422P] = { 1, 1 },
114  [AV_PIX_FMT_YUVJ444P] = { 1, 1 },
115  [AV_PIX_FMT_YVYU422] = { 1, 1 },
116  [AV_PIX_FMT_UYVY422] = { 1, 1 },
117  [AV_PIX_FMT_UYYVYY411] = { 0, 0 },
118  [AV_PIX_FMT_BGR8] = { 1, 1 },
119  [AV_PIX_FMT_BGR4] = { 0, 1 },
120  [AV_PIX_FMT_BGR4_BYTE] = { 1, 1 },
121  [AV_PIX_FMT_RGB8] = { 1, 1 },
122  [AV_PIX_FMT_RGB4] = { 0, 1 },
123  [AV_PIX_FMT_RGB4_BYTE] = { 1, 1 },
124  [AV_PIX_FMT_NV12] = { 1, 1 },
125  [AV_PIX_FMT_NV21] = { 1, 1 },
126  [AV_PIX_FMT_ARGB] = { 1, 1 },
127  [AV_PIX_FMT_RGBA] = { 1, 1 },
128  [AV_PIX_FMT_ABGR] = { 1, 1 },
129  [AV_PIX_FMT_BGRA] = { 1, 1 },
130  [AV_PIX_FMT_0RGB] = { 1, 1 },
131  [AV_PIX_FMT_RGB0] = { 1, 1 },
132  [AV_PIX_FMT_0BGR] = { 1, 1 },
133  [AV_PIX_FMT_BGR0] = { 1, 1 },
134  [AV_PIX_FMT_GRAY10BE] = { 1, 1 },
135  [AV_PIX_FMT_GRAY10LE] = { 1, 1 },
136  [AV_PIX_FMT_GRAY12BE] = { 1, 1 },
137  [AV_PIX_FMT_GRAY12LE] = { 1, 1 },
138  [AV_PIX_FMT_GRAY16BE] = { 1, 1 },
139  [AV_PIX_FMT_GRAY16LE] = { 1, 1 },
140  [AV_PIX_FMT_YUV440P] = { 1, 1 },
141  [AV_PIX_FMT_YUVJ440P] = { 1, 1 },
142  [AV_PIX_FMT_YUV440P10LE] = { 1, 1 },
143  [AV_PIX_FMT_YUV440P10BE] = { 1, 1 },
144  [AV_PIX_FMT_YUV440P12LE] = { 1, 1 },
145  [AV_PIX_FMT_YUV440P12BE] = { 1, 1 },
146  [AV_PIX_FMT_YUVA420P] = { 1, 1 },
147  [AV_PIX_FMT_YUVA422P] = { 1, 1 },
148  [AV_PIX_FMT_YUVA444P] = { 1, 1 },
149  [AV_PIX_FMT_YUVA420P9BE] = { 1, 1 },
150  [AV_PIX_FMT_YUVA420P9LE] = { 1, 1 },
151  [AV_PIX_FMT_YUVA422P9BE] = { 1, 1 },
152  [AV_PIX_FMT_YUVA422P9LE] = { 1, 1 },
153  [AV_PIX_FMT_YUVA444P9BE] = { 1, 1 },
154  [AV_PIX_FMT_YUVA444P9LE] = { 1, 1 },
155  [AV_PIX_FMT_YUVA420P10BE]= { 1, 1 },
156  [AV_PIX_FMT_YUVA420P10LE]= { 1, 1 },
157  [AV_PIX_FMT_YUVA422P10BE]= { 1, 1 },
158  [AV_PIX_FMT_YUVA422P10LE]= { 1, 1 },
159  [AV_PIX_FMT_YUVA444P10BE]= { 1, 1 },
160  [AV_PIX_FMT_YUVA444P10LE]= { 1, 1 },
161  [AV_PIX_FMT_YUVA420P16BE]= { 1, 1 },
162  [AV_PIX_FMT_YUVA420P16LE]= { 1, 1 },
163  [AV_PIX_FMT_YUVA422P16BE]= { 1, 1 },
164  [AV_PIX_FMT_YUVA422P16LE]= { 1, 1 },
165  [AV_PIX_FMT_YUVA444P16BE]= { 1, 1 },
166  [AV_PIX_FMT_YUVA444P16LE]= { 1, 1 },
167  [AV_PIX_FMT_RGB48BE] = { 1, 1 },
168  [AV_PIX_FMT_RGB48LE] = { 1, 1 },
169  [AV_PIX_FMT_RGBA64BE] = { 1, 1, 1 },
170  [AV_PIX_FMT_RGBA64LE] = { 1, 1, 1 },
171  [AV_PIX_FMT_RGB565BE] = { 1, 1 },
172  [AV_PIX_FMT_RGB565LE] = { 1, 1 },
173  [AV_PIX_FMT_RGB555BE] = { 1, 1 },
174  [AV_PIX_FMT_RGB555LE] = { 1, 1 },
175  [AV_PIX_FMT_BGR565BE] = { 1, 1 },
176  [AV_PIX_FMT_BGR565LE] = { 1, 1 },
177  [AV_PIX_FMT_BGR555BE] = { 1, 1 },
178  [AV_PIX_FMT_BGR555LE] = { 1, 1 },
179  [AV_PIX_FMT_YUV420P16LE] = { 1, 1 },
180  [AV_PIX_FMT_YUV420P16BE] = { 1, 1 },
181  [AV_PIX_FMT_YUV422P16LE] = { 1, 1 },
182  [AV_PIX_FMT_YUV422P16BE] = { 1, 1 },
183  [AV_PIX_FMT_YUV444P16LE] = { 1, 1 },
184  [AV_PIX_FMT_YUV444P16BE] = { 1, 1 },
185  [AV_PIX_FMT_RGB444LE] = { 1, 1 },
186  [AV_PIX_FMT_RGB444BE] = { 1, 1 },
187  [AV_PIX_FMT_BGR444LE] = { 1, 1 },
188  [AV_PIX_FMT_BGR444BE] = { 1, 1 },
189  [AV_PIX_FMT_YA8] = { 1, 1 },
190  [AV_PIX_FMT_YA16BE] = { 1, 0 },
191  [AV_PIX_FMT_YA16LE] = { 1, 0 },
192  [AV_PIX_FMT_BGR48BE] = { 1, 1 },
193  [AV_PIX_FMT_BGR48LE] = { 1, 1 },
194  [AV_PIX_FMT_BGRA64BE] = { 1, 1, 1 },
195  [AV_PIX_FMT_BGRA64LE] = { 1, 1, 1 },
196  [AV_PIX_FMT_YUV420P9BE] = { 1, 1 },
197  [AV_PIX_FMT_YUV420P9LE] = { 1, 1 },
198  [AV_PIX_FMT_YUV420P10BE] = { 1, 1 },
199  [AV_PIX_FMT_YUV420P10LE] = { 1, 1 },
200  [AV_PIX_FMT_YUV420P12BE] = { 1, 1 },
201  [AV_PIX_FMT_YUV420P12LE] = { 1, 1 },
202  [AV_PIX_FMT_YUV420P14BE] = { 1, 1 },
203  [AV_PIX_FMT_YUV420P14LE] = { 1, 1 },
204  [AV_PIX_FMT_YUV422P9BE] = { 1, 1 },
205  [AV_PIX_FMT_YUV422P9LE] = { 1, 1 },
206  [AV_PIX_FMT_YUV422P10BE] = { 1, 1 },
207  [AV_PIX_FMT_YUV422P10LE] = { 1, 1 },
208  [AV_PIX_FMT_YUV422P12BE] = { 1, 1 },
209  [AV_PIX_FMT_YUV422P12LE] = { 1, 1 },
210  [AV_PIX_FMT_YUV422P14BE] = { 1, 1 },
211  [AV_PIX_FMT_YUV422P14LE] = { 1, 1 },
212  [AV_PIX_FMT_YUV444P9BE] = { 1, 1 },
213  [AV_PIX_FMT_YUV444P9LE] = { 1, 1 },
214  [AV_PIX_FMT_YUV444P10BE] = { 1, 1 },
215  [AV_PIX_FMT_YUV444P10LE] = { 1, 1 },
216  [AV_PIX_FMT_YUV444P12BE] = { 1, 1 },
217  [AV_PIX_FMT_YUV444P12LE] = { 1, 1 },
218  [AV_PIX_FMT_YUV444P14BE] = { 1, 1 },
219  [AV_PIX_FMT_YUV444P14LE] = { 1, 1 },
220  [AV_PIX_FMT_GBRP] = { 1, 1 },
221  [AV_PIX_FMT_GBRP9LE] = { 1, 1 },
222  [AV_PIX_FMT_GBRP9BE] = { 1, 1 },
223  [AV_PIX_FMT_GBRP10LE] = { 1, 1 },
224  [AV_PIX_FMT_GBRP10BE] = { 1, 1 },
225  [AV_PIX_FMT_GBRAP10LE] = { 1, 1 },
226  [AV_PIX_FMT_GBRAP10BE] = { 1, 1 },
227  [AV_PIX_FMT_GBRP12LE] = { 1, 1 },
228  [AV_PIX_FMT_GBRP12BE] = { 1, 1 },
229  [AV_PIX_FMT_GBRAP12LE] = { 1, 1 },
230  [AV_PIX_FMT_GBRAP12BE] = { 1, 1 },
231  [AV_PIX_FMT_GBRP14LE] = { 1, 1 },
232  [AV_PIX_FMT_GBRP14BE] = { 1, 1 },
233  [AV_PIX_FMT_GBRP16LE] = { 1, 1 },
234  [AV_PIX_FMT_GBRP16BE] = { 1, 1 },
235  [AV_PIX_FMT_GBRAP] = { 1, 1 },
236  [AV_PIX_FMT_GBRAP16LE] = { 1, 1 },
237  [AV_PIX_FMT_GBRAP16BE] = { 1, 1 },
238  [AV_PIX_FMT_BAYER_BGGR8] = { 1, 0 },
239  [AV_PIX_FMT_BAYER_RGGB8] = { 1, 0 },
240  [AV_PIX_FMT_BAYER_GBRG8] = { 1, 0 },
241  [AV_PIX_FMT_BAYER_GRBG8] = { 1, 0 },
242  [AV_PIX_FMT_BAYER_BGGR16LE] = { 1, 0 },
243  [AV_PIX_FMT_BAYER_BGGR16BE] = { 1, 0 },
244  [AV_PIX_FMT_BAYER_RGGB16LE] = { 1, 0 },
245  [AV_PIX_FMT_BAYER_RGGB16BE] = { 1, 0 },
246  [AV_PIX_FMT_BAYER_GBRG16LE] = { 1, 0 },
247  [AV_PIX_FMT_BAYER_GBRG16BE] = { 1, 0 },
248  [AV_PIX_FMT_BAYER_GRBG16LE] = { 1, 0 },
249  [AV_PIX_FMT_BAYER_GRBG16BE] = { 1, 0 },
250  [AV_PIX_FMT_XYZ12BE] = { 1, 1, 1 },
251  [AV_PIX_FMT_XYZ12LE] = { 1, 1, 1 },
252  [AV_PIX_FMT_AYUV64LE] = { 1, 1},
253  [AV_PIX_FMT_P010LE] = { 1, 1 },
254  [AV_PIX_FMT_P010BE] = { 1, 1 },
255 };
256 
258 {
259  return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
260  format_entries[pix_fmt].is_supported_in : 0;
261 }
262 
264 {
265  return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
266  format_entries[pix_fmt].is_supported_out : 0;
267 }
268 
270 {
271  return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
272  format_entries[pix_fmt].is_supported_endianness : 0;
273 }
274 
275 static double getSplineCoeff(double a, double b, double c, double d,
276  double dist)
277 {
278  if (dist <= 1.0)
279  return ((d * dist + c) * dist + b) * dist + a;
280  else
281  return getSplineCoeff(0.0,
282  b + 2.0 * c + 3.0 * d,
283  c + 3.0 * d,
284  -b - 3.0 * c - 6.0 * d,
285  dist - 1.0);
286 }
287 
288 static av_cold int get_local_pos(SwsContext *s, int chr_subsample, int pos, int dir)
289 {
290  if (pos == -1 || pos <= -513) {
291  pos = (128 << chr_subsample) - 128;
292  }
293  pos += 128; // relative to ideal left edge
294  return pos >> chr_subsample;
295 }
296 
297 typedef struct {
298  int flag; ///< flag associated to the algorithm
299  const char *description; ///< human-readable description
300  int size_factor; ///< size factor used when initing the filters
302 
304  { SWS_AREA, "area averaging", 1 /* downscale only, for upscale it is bilinear */ },
305  { SWS_BICUBIC, "bicubic", 4 },
306  { SWS_BICUBLIN, "luma bicubic / chroma bilinear", -1 },
307  { SWS_BILINEAR, "bilinear", 2 },
308  { SWS_FAST_BILINEAR, "fast bilinear", -1 },
309  { SWS_GAUSS, "Gaussian", 8 /* infinite ;) */ },
310  { SWS_LANCZOS, "Lanczos", -1 /* custom */ },
311  { SWS_POINT, "nearest neighbor / point", -1 },
312  { SWS_SINC, "sinc", 20 /* infinite ;) */ },
313  { SWS_SPLINE, "bicubic spline", 20 /* infinite :)*/ },
314  { SWS_X, "experimental", 8 },
315 };
316 
317 static av_cold int initFilter(int16_t **outFilter, int32_t **filterPos,
318  int *outFilterSize, int xInc, int srcW,
319  int dstW, int filterAlign, int one,
320  int flags, int cpu_flags,
321  SwsVector *srcFilter, SwsVector *dstFilter,
322  double param[2], int srcPos, int dstPos)
323 {
324  int i;
325  int filterSize;
326  int filter2Size;
327  int minFilterSize;
328  int64_t *filter = NULL;
329  int64_t *filter2 = NULL;
330  const int64_t fone = 1LL << (54 - FFMIN(av_log2(srcW/dstW), 8));
331  int ret = -1;
332 
333  emms_c(); // FIXME should not be required but IS (even for non-MMX versions)
334 
335  // NOTE: the +3 is for the MMX(+1) / SSE(+3) scaler which reads over the end
336  FF_ALLOC_ARRAY_OR_GOTO(NULL, *filterPos, (dstW + 3), sizeof(**filterPos), fail);
337 
338  if (FFABS(xInc - 0x10000) < 10 && srcPos == dstPos) { // unscaled
339  int i;
340  filterSize = 1;
342  dstW, sizeof(*filter) * filterSize, fail);
343 
344  for (i = 0; i < dstW; i++) {
345  filter[i * filterSize] = fone;
346  (*filterPos)[i] = i;
347  }
348  } else if (flags & SWS_POINT) { // lame looking point sampling mode
349  int i;
350  int64_t xDstInSrc;
351  filterSize = 1;
353  dstW, sizeof(*filter) * filterSize, fail);
354 
355  xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7);
356  for (i = 0; i < dstW; i++) {
357  int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
358 
359  (*filterPos)[i] = xx;
360  filter[i] = fone;
361  xDstInSrc += xInc;
362  }
363  } else if ((xInc <= (1 << 16) && (flags & SWS_AREA)) ||
364  (flags & SWS_FAST_BILINEAR)) { // bilinear upscale
365  int i;
366  int64_t xDstInSrc;
367  filterSize = 2;
369  dstW, sizeof(*filter) * filterSize, fail);
370 
371  xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7);
372  for (i = 0; i < dstW; i++) {
373  int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
374  int j;
375 
376  (*filterPos)[i] = xx;
377  // bilinear upscale / linear interpolate / area averaging
378  for (j = 0; j < filterSize; j++) {
379  int64_t coeff= fone - FFABS(((int64_t)xx<<16) - xDstInSrc)*(fone>>16);
380  if (coeff < 0)
381  coeff = 0;
382  filter[i * filterSize + j] = coeff;
383  xx++;
384  }
385  xDstInSrc += xInc;
386  }
387  } else {
388  int64_t xDstInSrc;
389  int sizeFactor = -1;
390 
391  for (i = 0; i < FF_ARRAY_ELEMS(scale_algorithms); i++) {
392  if (flags & scale_algorithms[i].flag && scale_algorithms[i].size_factor > 0) {
393  sizeFactor = scale_algorithms[i].size_factor;
394  break;
395  }
396  }
397  if (flags & SWS_LANCZOS)
398  sizeFactor = param[0] != SWS_PARAM_DEFAULT ? ceil(2 * param[0]) : 6;
399  av_assert0(sizeFactor > 0);
400 
401  if (xInc <= 1 << 16)
402  filterSize = 1 + sizeFactor; // upscale
403  else
404  filterSize = 1 + (sizeFactor * srcW + dstW - 1) / dstW;
405 
406  filterSize = FFMIN(filterSize, srcW - 2);
407  filterSize = FFMAX(filterSize, 1);
408 
410  dstW, sizeof(*filter) * filterSize, fail);
411 
412  xDstInSrc = ((dstPos*(int64_t)xInc)>>7) - ((srcPos*0x10000LL)>>7);
413  for (i = 0; i < dstW; i++) {
414  int xx = (xDstInSrc - (filterSize - 2) * (1LL<<16)) / (1 << 17);
415  int j;
416  (*filterPos)[i] = xx;
417  for (j = 0; j < filterSize; j++) {
418  int64_t d = (FFABS(((int64_t)xx * (1 << 17)) - xDstInSrc)) << 13;
419  double floatd;
420  int64_t coeff;
421 
422  if (xInc > 1 << 16)
423  d = d * dstW / srcW;
424  floatd = d * (1.0 / (1 << 30));
425 
426  if (flags & SWS_BICUBIC) {
427  int64_t B = (param[0] != SWS_PARAM_DEFAULT ? param[0] : 0) * (1 << 24);
428  int64_t C = (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1 << 24);
429 
430  if (d >= 1LL << 31) {
431  coeff = 0.0;
432  } else {
433  int64_t dd = (d * d) >> 30;
434  int64_t ddd = (dd * d) >> 30;
435 
436  if (d < 1LL << 30)
437  coeff = (12 * (1 << 24) - 9 * B - 6 * C) * ddd +
438  (-18 * (1 << 24) + 12 * B + 6 * C) * dd +
439  (6 * (1 << 24) - 2 * B) * (1 << 30);
440  else
441  coeff = (-B - 6 * C) * ddd +
442  (6 * B + 30 * C) * dd +
443  (-12 * B - 48 * C) * d +
444  (8 * B + 24 * C) * (1 << 30);
445  }
446  coeff /= (1LL<<54)/fone;
447  }
448 #if 0
449  else if (flags & SWS_X) {
450  double p = param ? param * 0.01 : 0.3;
451  coeff = d ? sin(d * M_PI) / (d * M_PI) : 1.0;
452  coeff *= pow(2.0, -p * d * d);
453  }
454 #endif
455  else if (flags & SWS_X) {
456  double A = param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
457  double c;
458 
459  if (floatd < 1.0)
460  c = cos(floatd * M_PI);
461  else
462  c = -1.0;
463  if (c < 0.0)
464  c = -pow(-c, A);
465  else
466  c = pow(c, A);
467  coeff = (c * 0.5 + 0.5) * fone;
468  } else if (flags & SWS_AREA) {
469  int64_t d2 = d - (1 << 29);
470  if (d2 * xInc < -(1LL << (29 + 16)))
471  coeff = 1.0 * (1LL << (30 + 16));
472  else if (d2 * xInc < (1LL << (29 + 16)))
473  coeff = -d2 * xInc + (1LL << (29 + 16));
474  else
475  coeff = 0.0;
476  coeff *= fone >> (30 + 16);
477  } else if (flags & SWS_GAUSS) {
478  double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
479  coeff = exp2(-p * floatd * floatd) * fone;
480  } else if (flags & SWS_SINC) {
481  coeff = (d ? sin(floatd * M_PI) / (floatd * M_PI) : 1.0) * fone;
482  } else if (flags & SWS_LANCZOS) {
483  double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
484  coeff = (d ? sin(floatd * M_PI) * sin(floatd * M_PI / p) /
485  (floatd * floatd * M_PI * M_PI / p) : 1.0) * fone;
486  if (floatd > p)
487  coeff = 0;
488  } else if (flags & SWS_BILINEAR) {
489  coeff = (1 << 30) - d;
490  if (coeff < 0)
491  coeff = 0;
492  coeff *= fone >> 30;
493  } else if (flags & SWS_SPLINE) {
494  double p = -2.196152422706632;
495  coeff = getSplineCoeff(1.0, 0.0, p, -p - 1.0, floatd) * fone;
496  } else {
497  av_assert0(0);
498  }
499 
500  filter[i * filterSize + j] = coeff;
501  xx++;
502  }
503  xDstInSrc += 2 * xInc;
504  }
505  }
506 
507  /* apply src & dst Filter to filter -> filter2
508  * av_free(filter);
509  */
510  av_assert0(filterSize > 0);
511  filter2Size = filterSize;
512  if (srcFilter)
513  filter2Size += srcFilter->length - 1;
514  if (dstFilter)
515  filter2Size += dstFilter->length - 1;
516  av_assert0(filter2Size > 0);
517  FF_ALLOCZ_ARRAY_OR_GOTO(NULL, filter2, dstW, filter2Size * sizeof(*filter2), fail);
518 
519  for (i = 0; i < dstW; i++) {
520  int j, k;
521 
522  if (srcFilter) {
523  for (k = 0; k < srcFilter->length; k++) {
524  for (j = 0; j < filterSize; j++)
525  filter2[i * filter2Size + k + j] +=
526  srcFilter->coeff[k] * filter[i * filterSize + j];
527  }
528  } else {
529  for (j = 0; j < filterSize; j++)
530  filter2[i * filter2Size + j] = filter[i * filterSize + j];
531  }
532  // FIXME dstFilter
533 
534  (*filterPos)[i] += (filterSize - 1) / 2 - (filter2Size - 1) / 2;
535  }
536  av_freep(&filter);
537 
538  /* try to reduce the filter-size (step1 find size and shift left) */
539  // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).
540  minFilterSize = 0;
541  for (i = dstW - 1; i >= 0; i--) {
542  int min = filter2Size;
543  int j;
544  int64_t cutOff = 0.0;
545 
546  /* get rid of near zero elements on the left by shifting left */
547  for (j = 0; j < filter2Size; j++) {
548  int k;
549  cutOff += FFABS(filter2[i * filter2Size]);
550 
551  if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone)
552  break;
553 
554  /* preserve monotonicity because the core can't handle the
555  * filter otherwise */
556  if (i < dstW - 1 && (*filterPos)[i] >= (*filterPos)[i + 1])
557  break;
558 
559  // move filter coefficients left
560  for (k = 1; k < filter2Size; k++)
561  filter2[i * filter2Size + k - 1] = filter2[i * filter2Size + k];
562  filter2[i * filter2Size + k - 1] = 0;
563  (*filterPos)[i]++;
564  }
565 
566  cutOff = 0;
567  /* count near zeros on the right */
568  for (j = filter2Size - 1; j > 0; j--) {
569  cutOff += FFABS(filter2[i * filter2Size + j]);
570 
571  if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone)
572  break;
573  min--;
574  }
575 
576  if (min > minFilterSize)
577  minFilterSize = min;
578  }
579 
580  if (PPC_ALTIVEC(cpu_flags)) {
581  // we can handle the special case 4, so we don't want to go the full 8
582  if (minFilterSize < 5)
583  filterAlign = 4;
584 
585  /* We really don't want to waste our time doing useless computation, so
586  * fall back on the scalar C code for very small filters.
587  * Vectorizing is worth it only if you have a decent-sized vector. */
588  if (minFilterSize < 3)
589  filterAlign = 1;
590  }
591 
592  if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
593  // special case for unscaled vertical filtering
594  if (minFilterSize == 1 && filterAlign == 2)
595  filterAlign = 1;
596  }
597 
598  av_assert0(minFilterSize > 0);
599  filterSize = (minFilterSize + (filterAlign - 1)) & (~(filterAlign - 1));
600  av_assert0(filterSize > 0);
601  filter = av_malloc_array(dstW, filterSize * sizeof(*filter));
602  if (!filter)
603  goto fail;
604  if (filterSize >= MAX_FILTER_SIZE * 16 /
605  ((flags & SWS_ACCURATE_RND) ? APCK_SIZE : 16)) {
606  ret = RETCODE_USE_CASCADE;
607  goto fail;
608  }
609  *outFilterSize = filterSize;
610 
611  if (flags & SWS_PRINT_INFO)
613  "SwScaler: reducing / aligning filtersize %d -> %d\n",
614  filter2Size, filterSize);
615  /* try to reduce the filter-size (step2 reduce it) */
616  for (i = 0; i < dstW; i++) {
617  int j;
618 
619  for (j = 0; j < filterSize; j++) {
620  if (j >= filter2Size)
621  filter[i * filterSize + j] = 0;
622  else
623  filter[i * filterSize + j] = filter2[i * filter2Size + j];
624  if ((flags & SWS_BITEXACT) && j >= minFilterSize)
625  filter[i * filterSize + j] = 0;
626  }
627  }
628 
629  // FIXME try to align filterPos if possible
630 
631  // fix borders
632  for (i = 0; i < dstW; i++) {
633  int j;
634  if ((*filterPos)[i] < 0) {
635  // move filter coefficients left to compensate for filterPos
636  for (j = 1; j < filterSize; j++) {
637  int left = FFMAX(j + (*filterPos)[i], 0);
638  filter[i * filterSize + left] += filter[i * filterSize + j];
639  filter[i * filterSize + j] = 0;
640  }
641  (*filterPos)[i]= 0;
642  }
643 
644  if ((*filterPos)[i] + filterSize > srcW) {
645  int shift = (*filterPos)[i] + FFMIN(filterSize - srcW, 0);
646  int64_t acc = 0;
647 
648  for (j = filterSize - 1; j >= 0; j--) {
649  if ((*filterPos)[i] + j >= srcW) {
650  acc += filter[i * filterSize + j];
651  filter[i * filterSize + j] = 0;
652  }
653  }
654  for (j = filterSize - 1; j >= 0; j--) {
655  if (j < shift) {
656  filter[i * filterSize + j] = 0;
657  } else {
658  filter[i * filterSize + j] = filter[i * filterSize + j - shift];
659  }
660  }
661 
662  (*filterPos)[i]-= shift;
663  filter[i * filterSize + srcW - 1 - (*filterPos)[i]] += acc;
664  }
665  av_assert0((*filterPos)[i] >= 0);
666  av_assert0((*filterPos)[i] < srcW);
667  if ((*filterPos)[i] + filterSize > srcW) {
668  for (j = 0; j < filterSize; j++) {
669  av_assert0((*filterPos)[i] + j < srcW || !filter[i * filterSize + j]);
670  }
671  }
672  }
673 
674  // Note the +1 is for the MMX scaler which reads over the end
675  /* align at 16 for AltiVec (needed by hScale_altivec_real) */
676  FF_ALLOCZ_ARRAY_OR_GOTO(NULL, *outFilter,
677  (dstW + 3), *outFilterSize * sizeof(int16_t), fail);
678 
679  /* normalize & store in outFilter */
680  for (i = 0; i < dstW; i++) {
681  int j;
682  int64_t error = 0;
683  int64_t sum = 0;
684 
685  for (j = 0; j < filterSize; j++) {
686  sum += filter[i * filterSize + j];
687  }
688  sum = (sum + one / 2) / one;
689  if (!sum) {
690  av_log(NULL, AV_LOG_WARNING, "SwScaler: zero vector in scaling\n");
691  sum = 1;
692  }
693  for (j = 0; j < *outFilterSize; j++) {
694  int64_t v = filter[i * filterSize + j] + error;
695  int intV = ROUNDED_DIV(v, sum);
696  (*outFilter)[i * (*outFilterSize) + j] = intV;
697  error = v - intV * sum;
698  }
699  }
700 
701  (*filterPos)[dstW + 0] =
702  (*filterPos)[dstW + 1] =
703  (*filterPos)[dstW + 2] = (*filterPos)[dstW - 1]; /* the MMX/SSE scaler will
704  * read over the end */
705  for (i = 0; i < *outFilterSize; i++) {
706  int k = (dstW - 1) * (*outFilterSize) + i;
707  (*outFilter)[k + 1 * (*outFilterSize)] =
708  (*outFilter)[k + 2 * (*outFilterSize)] =
709  (*outFilter)[k + 3 * (*outFilterSize)] = (*outFilter)[k];
710  }
711 
712  ret = 0;
713 
714 fail:
715  if(ret < 0)
716  av_log(NULL, ret == RETCODE_USE_CASCADE ? AV_LOG_DEBUG : AV_LOG_ERROR, "sws: initFilter failed\n");
717  av_free(filter);
718  av_free(filter2);
719  return ret;
720 }
721 
722 static void fill_rgb2yuv_table(SwsContext *c, const int table[4], int dstRange)
723 {
724  int64_t W, V, Z, Cy, Cu, Cv;
725  int64_t vr = table[0];
726  int64_t ub = table[1];
727  int64_t ug = -table[2];
728  int64_t vg = -table[3];
729  int64_t ONE = 65536;
730  int64_t cy = ONE;
732  int i;
733  static const int8_t map[] = {
734  BY_IDX, GY_IDX, -1 , BY_IDX, BY_IDX, GY_IDX, -1 , BY_IDX,
735  RY_IDX, -1 , GY_IDX, RY_IDX, RY_IDX, -1 , GY_IDX, RY_IDX,
736  RY_IDX, GY_IDX, -1 , RY_IDX, RY_IDX, GY_IDX, -1 , RY_IDX,
737  BY_IDX, -1 , GY_IDX, BY_IDX, BY_IDX, -1 , GY_IDX, BY_IDX,
738  BU_IDX, GU_IDX, -1 , BU_IDX, BU_IDX, GU_IDX, -1 , BU_IDX,
739  RU_IDX, -1 , GU_IDX, RU_IDX, RU_IDX, -1 , GU_IDX, RU_IDX,
740  RU_IDX, GU_IDX, -1 , RU_IDX, RU_IDX, GU_IDX, -1 , RU_IDX,
741  BU_IDX, -1 , GU_IDX, BU_IDX, BU_IDX, -1 , GU_IDX, BU_IDX,
742  BV_IDX, GV_IDX, -1 , BV_IDX, BV_IDX, GV_IDX, -1 , BV_IDX,
743  RV_IDX, -1 , GV_IDX, RV_IDX, RV_IDX, -1 , GV_IDX, RV_IDX,
744  RV_IDX, GV_IDX, -1 , RV_IDX, RV_IDX, GV_IDX, -1 , RV_IDX,
745  BV_IDX, -1 , GV_IDX, BV_IDX, BV_IDX, -1 , GV_IDX, BV_IDX,
748  GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 ,
749  -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX,
752  GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 ,
753  -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX,
756  GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 ,
757  -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, //23
758  -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //24
759  -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //25
760  -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //26
761  -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //27
762  -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //28
763  -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //29
764  -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //30
765  -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //31
766  BY_IDX, GY_IDX, RY_IDX, -1 , -1 , -1 , -1 , -1 , //32
767  BU_IDX, GU_IDX, RU_IDX, -1 , -1 , -1 , -1 , -1 , //33
768  BV_IDX, GV_IDX, RV_IDX, -1 , -1 , -1 , -1 , -1 , //34
769  };
770 
771  dstRange = 0; //FIXME range = 1 is handled elsewhere
772 
773  if (!dstRange) {
774  cy = cy * 255 / 219;
775  } else {
776  vr = vr * 224 / 255;
777  ub = ub * 224 / 255;
778  ug = ug * 224 / 255;
779  vg = vg * 224 / 255;
780  }
781  W = ROUNDED_DIV(ONE*ONE*ug, ub);
782  V = ROUNDED_DIV(ONE*ONE*vg, vr);
783  Z = ONE*ONE-W-V;
784 
785  Cy = ROUNDED_DIV(cy*Z, ONE);
786  Cu = ROUNDED_DIV(ub*Z, ONE);
787  Cv = ROUNDED_DIV(vr*Z, ONE);
788 
789  c->input_rgb2yuv_table[RY_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*V , Cy);
790  c->input_rgb2yuv_table[GY_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cy);
791  c->input_rgb2yuv_table[BY_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*W , Cy);
792 
793  c->input_rgb2yuv_table[RU_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*V , Cu);
794  c->input_rgb2yuv_table[GU_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cu);
795  c->input_rgb2yuv_table[BU_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*(Z+W) , Cu);
796 
797  c->input_rgb2yuv_table[RV_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*(V+Z) , Cv);
798  c->input_rgb2yuv_table[GV_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cv);
799  c->input_rgb2yuv_table[BV_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*W , Cv);
800 
801  if(/*!dstRange && */!memcmp(table, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], sizeof(ff_yuv2rgb_coeffs[SWS_CS_DEFAULT]))) {
802  c->input_rgb2yuv_table[BY_IDX] = ((int)(0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
803  c->input_rgb2yuv_table[BV_IDX] = (-(int)(0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
804  c->input_rgb2yuv_table[BU_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
805  c->input_rgb2yuv_table[GY_IDX] = ((int)(0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
806  c->input_rgb2yuv_table[GV_IDX] = (-(int)(0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
807  c->input_rgb2yuv_table[GU_IDX] = (-(int)(0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
808  c->input_rgb2yuv_table[RY_IDX] = ((int)(0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
809  c->input_rgb2yuv_table[RV_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
810  c->input_rgb2yuv_table[RU_IDX] = (-(int)(0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
811  }
812  for(i=0; i<FF_ARRAY_ELEMS(map); i++)
813  AV_WL16(p + 16*4 + 2*i, map[i] >= 0 ? c->input_rgb2yuv_table[map[i]] : 0);
814 }
815 
816 static void fill_xyztables(struct SwsContext *c)
817 {
818  int i;
819  double xyzgamma = XYZ_GAMMA;
820  double rgbgamma = 1.0 / RGB_GAMMA;
821  double xyzgammainv = 1.0 / XYZ_GAMMA;
822  double rgbgammainv = RGB_GAMMA;
823  static const int16_t xyz2rgb_matrix[3][4] = {
824  {13270, -6295, -2041},
825  {-3969, 7682, 170},
826  { 228, -835, 4329} };
827  static const int16_t rgb2xyz_matrix[3][4] = {
828  {1689, 1464, 739},
829  { 871, 2929, 296},
830  { 79, 488, 3891} };
831  static int16_t xyzgamma_tab[4096], rgbgamma_tab[4096], xyzgammainv_tab[4096], rgbgammainv_tab[4096];
832 
833  memcpy(c->xyz2rgb_matrix, xyz2rgb_matrix, sizeof(c->xyz2rgb_matrix));
834  memcpy(c->rgb2xyz_matrix, rgb2xyz_matrix, sizeof(c->rgb2xyz_matrix));
835  c->xyzgamma = xyzgamma_tab;
836  c->rgbgamma = rgbgamma_tab;
837  c->xyzgammainv = xyzgammainv_tab;
838  c->rgbgammainv = rgbgammainv_tab;
839 
840  if (rgbgamma_tab[4095])
841  return;
842 
843  /* set gamma vectors */
844  for (i = 0; i < 4096; i++) {
845  xyzgamma_tab[i] = lrint(pow(i / 4095.0, xyzgamma) * 4095.0);
846  rgbgamma_tab[i] = lrint(pow(i / 4095.0, rgbgamma) * 4095.0);
847  xyzgammainv_tab[i] = lrint(pow(i / 4095.0, xyzgammainv) * 4095.0);
848  rgbgammainv_tab[i] = lrint(pow(i / 4095.0, rgbgammainv) * 4095.0);
849  }
850 }
851 
852 int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
853  int srcRange, const int table[4], int dstRange,
854  int brightness, int contrast, int saturation)
855 {
856  const AVPixFmtDescriptor *desc_dst;
857  const AVPixFmtDescriptor *desc_src;
858  int need_reinit = 0;
859 
860  handle_formats(c);
861  desc_dst = av_pix_fmt_desc_get(c->dstFormat);
862  desc_src = av_pix_fmt_desc_get(c->srcFormat);
863 
864  if(!isYUV(c->dstFormat) && !isGray(c->dstFormat))
865  dstRange = 0;
866  if(!isYUV(c->srcFormat) && !isGray(c->srcFormat))
867  srcRange = 0;
868 
869  if (c->srcRange != srcRange ||
870  c->dstRange != dstRange ||
871  c->brightness != brightness ||
872  c->contrast != contrast ||
873  c->saturation != saturation ||
874  memcmp(c->srcColorspaceTable, inv_table, sizeof(int) * 4) ||
875  memcmp(c->dstColorspaceTable, table, sizeof(int) * 4)
876  )
877  need_reinit = 1;
878 
879  memmove(c->srcColorspaceTable, inv_table, sizeof(int) * 4);
880  memmove(c->dstColorspaceTable, table, sizeof(int) * 4);
881 
882 
883 
884  c->brightness = brightness;
885  c->contrast = contrast;
886  c->saturation = saturation;
887  c->srcRange = srcRange;
888  c->dstRange = dstRange;
889 
890  //The srcBpc check is possibly wrong but we seem to lack a definitive reference to test this
891  //and what we have in ticket 2939 looks better with this check
892  if (need_reinit && (c->srcBpc == 8 || !isYUV(c->srcFormat)))
894 
895  c->dstFormatBpp = av_get_bits_per_pixel(desc_dst);
896  c->srcFormatBpp = av_get_bits_per_pixel(desc_src);
897 
899  return sws_setColorspaceDetails(c->cascaded_context[c->cascaded_mainindex],inv_table, srcRange,table, dstRange, brightness, contrast, saturation);
900 
901  if (!need_reinit)
902  return 0;
903 
904  if ((isYUV(c->dstFormat) || isGray(c->dstFormat)) && (isYUV(c->srcFormat) || isGray(c->srcFormat))) {
905  if (!c->cascaded_context[0] &&
906  memcmp(c->dstColorspaceTable, c->srcColorspaceTable, sizeof(int) * 4) &&
907  c->srcW && c->srcH && c->dstW && c->dstH) {
908  enum AVPixelFormat tmp_format;
909  int tmp_width, tmp_height;
910  int srcW = c->srcW;
911  int srcH = c->srcH;
912  int dstW = c->dstW;
913  int dstH = c->dstH;
914  int ret;
915  av_log(c, AV_LOG_VERBOSE, "YUV color matrix differs for YUV->YUV, using intermediate RGB to convert\n");
916 
917  if (isNBPS(c->dstFormat) || is16BPS(c->dstFormat)) {
918  if (isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) {
919  tmp_format = AV_PIX_FMT_BGRA64;
920  } else {
921  tmp_format = AV_PIX_FMT_BGR48;
922  }
923  } else {
924  if (isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) {
925  tmp_format = AV_PIX_FMT_BGRA;
926  } else {
927  tmp_format = AV_PIX_FMT_BGR24;
928  }
929  }
930 
931  if (srcW*srcH > dstW*dstH) {
932  tmp_width = dstW;
933  tmp_height = dstH;
934  } else {
935  tmp_width = srcW;
936  tmp_height = srcH;
937  }
938 
940  tmp_width, tmp_height, tmp_format, 64);
941  if (ret < 0)
942  return ret;
943 
944  c->cascaded_context[0] = sws_alloc_set_opts(srcW, srcH, c->srcFormat,
945  tmp_width, tmp_height, tmp_format,
946  c->flags, c->param);
947  if (!c->cascaded_context[0])
948  return -1;
949 
951  ret = sws_init_context(c->cascaded_context[0], NULL , NULL);
952  if (ret < 0)
953  return ret;
954  //we set both src and dst depending on that the RGB side will be ignored
956  srcRange, table, dstRange,
957  brightness, contrast, saturation);
958 
959  c->cascaded_context[1] = sws_getContext(tmp_width, tmp_height, tmp_format,
960  dstW, dstH, c->dstFormat,
961  c->flags, NULL, NULL, c->param);
962  if (!c->cascaded_context[1])
963  return -1;
965  srcRange, table, dstRange,
966  0, 1 << 16, 1 << 16);
967  return 0;
968  }
969  return -1;
970  }
971 
972  if (!isYUV(c->dstFormat) && !isGray(c->dstFormat)) {
973  ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness,
974  contrast, saturation);
975  // FIXME factorize
976 
977  if (ARCH_PPC)
978  ff_yuv2rgb_init_tables_ppc(c, inv_table, brightness,
979  contrast, saturation);
980  }
981 
982  fill_rgb2yuv_table(c, table, dstRange);
983 
984  return 0;
985 }
986 
987 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table,
988  int *srcRange, int **table, int *dstRange,
989  int *brightness, int *contrast, int *saturation)
990 {
991  if (!c )
992  return -1;
993 
994  *inv_table = c->srcColorspaceTable;
995  *table = c->dstColorspaceTable;
996  *srcRange = c->srcRange;
997  *dstRange = c->dstRange;
998  *brightness = c->brightness;
999  *contrast = c->contrast;
1000  *saturation = c->saturation;
1001 
1002  return 0;
1003 }
1004 
1006 {
1007  switch (*format) {
1008  case AV_PIX_FMT_YUVJ420P:
1009  *format = AV_PIX_FMT_YUV420P;
1010  return 1;
1011  case AV_PIX_FMT_YUVJ411P:
1012  *format = AV_PIX_FMT_YUV411P;
1013  return 1;
1014  case AV_PIX_FMT_YUVJ422P:
1015  *format = AV_PIX_FMT_YUV422P;
1016  return 1;
1017  case AV_PIX_FMT_YUVJ444P:
1018  *format = AV_PIX_FMT_YUV444P;
1019  return 1;
1020  case AV_PIX_FMT_YUVJ440P:
1021  *format = AV_PIX_FMT_YUV440P;
1022  return 1;
1023  case AV_PIX_FMT_GRAY8:
1024  case AV_PIX_FMT_YA8:
1025  case AV_PIX_FMT_GRAY16LE:
1026  case AV_PIX_FMT_GRAY16BE:
1027  case AV_PIX_FMT_YA16BE:
1028  case AV_PIX_FMT_YA16LE:
1029  return 1;
1030  default:
1031  return 0;
1032  }
1033 }
1034 
1036 {
1037  switch (*format) {
1038  case AV_PIX_FMT_0BGR : *format = AV_PIX_FMT_ABGR ; return 1;
1039  case AV_PIX_FMT_BGR0 : *format = AV_PIX_FMT_BGRA ; return 4;
1040  case AV_PIX_FMT_0RGB : *format = AV_PIX_FMT_ARGB ; return 1;
1041  case AV_PIX_FMT_RGB0 : *format = AV_PIX_FMT_RGBA ; return 4;
1042  default: return 0;
1043  }
1044 }
1045 
1047 {
1048  switch (*format) {
1049  case AV_PIX_FMT_XYZ12BE : *format = AV_PIX_FMT_RGB48BE; return 1;
1050  case AV_PIX_FMT_XYZ12LE : *format = AV_PIX_FMT_RGB48LE; return 1;
1051  default: return 0;
1052  }
1053 }
1054 
1056 {
1057  c->src0Alpha |= handle_0alpha(&c->srcFormat);
1058  c->dst0Alpha |= handle_0alpha(&c->dstFormat);
1059  c->srcXYZ |= handle_xyz(&c->srcFormat);
1060  c->dstXYZ |= handle_xyz(&c->dstFormat);
1061  if (c->srcXYZ || c->dstXYZ)
1062  fill_xyztables(c);
1063 }
1064 
1066 {
1067  SwsContext *c = av_mallocz(sizeof(SwsContext));
1068 
1069  av_assert0(offsetof(SwsContext, redDither) + DITHER32_INT == offsetof(SwsContext, dither32));
1070 
1071  if (c) {
1074  }
1075 
1076  return c;
1077 }
1078 
1079 static uint16_t * alloc_gamma_tbl(double e)
1080 {
1081  int i = 0;
1082  uint16_t * tbl;
1083  tbl = (uint16_t*)av_malloc(sizeof(uint16_t) * 1 << 16);
1084  if (!tbl)
1085  return NULL;
1086 
1087  for (i = 0; i < 65536; ++i) {
1088  tbl[i] = pow(i / 65535.0, e) * 65535.0;
1089  }
1090  return tbl;
1091 }
1092 
1094 {
1095  switch(fmt) {
1096  case AV_PIX_FMT_ARGB: return AV_PIX_FMT_RGB24;
1097  case AV_PIX_FMT_RGBA: return AV_PIX_FMT_RGB24;
1098  case AV_PIX_FMT_ABGR: return AV_PIX_FMT_BGR24;
1099  case AV_PIX_FMT_BGRA: return AV_PIX_FMT_BGR24;
1100  case AV_PIX_FMT_YA8: return AV_PIX_FMT_GRAY8;
1101 
1105 
1106  case AV_PIX_FMT_GBRAP: return AV_PIX_FMT_GBRP;
1107 
1110 
1113 
1116 
1121 
1122  case AV_PIX_FMT_YA16BE: return AV_PIX_FMT_GRAY16;
1123  case AV_PIX_FMT_YA16LE: return AV_PIX_FMT_GRAY16;
1124 
1143 
1144 // case AV_PIX_FMT_AYUV64LE:
1145 // case AV_PIX_FMT_AYUV64BE:
1146 // case AV_PIX_FMT_PAL8:
1147  default: return AV_PIX_FMT_NONE;
1148  }
1149 }
1150 
1152  SwsFilter *dstFilter)
1153 {
1154  int i;
1155  int usesVFilter, usesHFilter;
1156  int unscaled;
1157  SwsFilter dummyFilter = { NULL, NULL, NULL, NULL };
1158  int srcW = c->srcW;
1159  int srcH = c->srcH;
1160  int dstW = c->dstW;
1161  int dstH = c->dstH;
1162  int dst_stride = FFALIGN(dstW * sizeof(int16_t) + 66, 16);
1163  int flags, cpu_flags;
1164  enum AVPixelFormat srcFormat = c->srcFormat;
1165  enum AVPixelFormat dstFormat = c->dstFormat;
1166  const AVPixFmtDescriptor *desc_src;
1167  const AVPixFmtDescriptor *desc_dst;
1168  int ret = 0;
1169  enum AVPixelFormat tmpFmt;
1170 
1171  cpu_flags = av_get_cpu_flags();
1172  flags = c->flags;
1173  emms_c();
1174  if (!rgb15to16)
1176 
1177  unscaled = (srcW == dstW && srcH == dstH);
1178 
1179  c->srcRange |= handle_jpeg(&c->srcFormat);
1180  c->dstRange |= handle_jpeg(&c->dstFormat);
1181 
1182  if(srcFormat!=c->srcFormat || dstFormat!=c->dstFormat)
1183  av_log(c, AV_LOG_WARNING, "deprecated pixel format used, make sure you did set range correctly\n");
1184 
1185  if (!c->contrast && !c->saturation && !c->dstFormatBpp)
1186  sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], c->srcRange,
1187  ff_yuv2rgb_coeffs[SWS_CS_DEFAULT],
1188  c->dstRange, 0, 1 << 16, 1 << 16);
1189 
1190  handle_formats(c);
1191  srcFormat = c->srcFormat;
1192  dstFormat = c->dstFormat;
1193  desc_src = av_pix_fmt_desc_get(srcFormat);
1194  desc_dst = av_pix_fmt_desc_get(dstFormat);
1195 
1196  // If the source has no alpha then disable alpha blendaway
1197  if (c->src0Alpha)
1199 
1200  if (!(unscaled && sws_isSupportedEndiannessConversion(srcFormat) &&
1201  av_pix_fmt_swap_endianness(srcFormat) == dstFormat)) {
1202  if (!sws_isSupportedInput(srcFormat)) {
1203  av_log(c, AV_LOG_ERROR, "%s is not supported as input pixel format\n",
1204  av_get_pix_fmt_name(srcFormat));
1205  return AVERROR(EINVAL);
1206  }
1207  if (!sws_isSupportedOutput(dstFormat)) {
1208  av_log(c, AV_LOG_ERROR, "%s is not supported as output pixel format\n",
1209  av_get_pix_fmt_name(dstFormat));
1210  return AVERROR(EINVAL);
1211  }
1212  }
1213  av_assert2(desc_src && desc_dst);
1214 
1215  i = flags & (SWS_POINT |
1216  SWS_AREA |
1217  SWS_BILINEAR |
1219  SWS_BICUBIC |
1220  SWS_X |
1221  SWS_GAUSS |
1222  SWS_LANCZOS |
1223  SWS_SINC |
1224  SWS_SPLINE |
1225  SWS_BICUBLIN);
1226 
1227  /* provide a default scaler if not set by caller */
1228  if (!i) {
1229  if (dstW < srcW && dstH < srcH)
1230  flags |= SWS_BICUBIC;
1231  else if (dstW > srcW && dstH > srcH)
1232  flags |= SWS_BICUBIC;
1233  else
1234  flags |= SWS_BICUBIC;
1235  c->flags = flags;
1236  } else if (i & (i - 1)) {
1237  av_log(c, AV_LOG_ERROR,
1238  "Exactly one scaler algorithm must be chosen, got %X\n", i);
1239  return AVERROR(EINVAL);
1240  }
1241  /* sanity check */
1242  if (srcW < 1 || srcH < 1 || dstW < 1 || dstH < 1) {
1243  /* FIXME check if these are enough and try to lower them after
1244  * fixing the relevant parts of the code */
1245  av_log(c, AV_LOG_ERROR, "%dx%d -> %dx%d is invalid scaling dimension\n",
1246  srcW, srcH, dstW, dstH);
1247  return AVERROR(EINVAL);
1248  }
1249  if (flags & SWS_FAST_BILINEAR) {
1250  if (srcW < 8 || dstW < 8) {
1251  flags ^= SWS_FAST_BILINEAR | SWS_BILINEAR;
1252  c->flags = flags;
1253  }
1254  }
1255 
1256  if (!dstFilter)
1257  dstFilter = &dummyFilter;
1258  if (!srcFilter)
1259  srcFilter = &dummyFilter;
1260 
1261  c->lumXInc = (((int64_t)srcW << 16) + (dstW >> 1)) / dstW;
1262  c->lumYInc = (((int64_t)srcH << 16) + (dstH >> 1)) / dstH;
1263  c->dstFormatBpp = av_get_bits_per_pixel(desc_dst);
1264  c->srcFormatBpp = av_get_bits_per_pixel(desc_src);
1265  c->vRounder = 4 * 0x0001000100010001ULL;
1266 
1267  usesVFilter = (srcFilter->lumV && srcFilter->lumV->length > 1) ||
1268  (srcFilter->chrV && srcFilter->chrV->length > 1) ||
1269  (dstFilter->lumV && dstFilter->lumV->length > 1) ||
1270  (dstFilter->chrV && dstFilter->chrV->length > 1);
1271  usesHFilter = (srcFilter->lumH && srcFilter->lumH->length > 1) ||
1272  (srcFilter->chrH && srcFilter->chrH->length > 1) ||
1273  (dstFilter->lumH && dstFilter->lumH->length > 1) ||
1274  (dstFilter->chrH && dstFilter->chrH->length > 1);
1275 
1278 
1279  if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) {
1280  if (dstW&1) {
1281  av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to odd output size\n");
1282  flags |= SWS_FULL_CHR_H_INT;
1283  c->flags = flags;
1284  }
1285 
1286  if ( c->chrSrcHSubSample == 0
1287  && c->chrSrcVSubSample == 0
1288  && c->dither != SWS_DITHER_BAYER //SWS_FULL_CHR_H_INT is currently not supported with SWS_DITHER_BAYER
1289  && !(c->flags & SWS_FAST_BILINEAR)
1290  ) {
1291  av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to input having non subsampled chroma\n");
1292  flags |= SWS_FULL_CHR_H_INT;
1293  c->flags = flags;
1294  }
1295  }
1296 
1297  if (c->dither == SWS_DITHER_AUTO) {
1298  if (flags & SWS_ERROR_DIFFUSION)
1299  c->dither = SWS_DITHER_ED;
1300  }
1301 
1302  if(dstFormat == AV_PIX_FMT_BGR4_BYTE ||
1303  dstFormat == AV_PIX_FMT_RGB4_BYTE ||
1304  dstFormat == AV_PIX_FMT_BGR8 ||
1305  dstFormat == AV_PIX_FMT_RGB8) {
1306  if (c->dither == SWS_DITHER_AUTO)
1308  if (!(flags & SWS_FULL_CHR_H_INT)) {
1310  av_log(c, AV_LOG_DEBUG,
1311  "Desired dithering only supported in full chroma interpolation for destination format '%s'\n",
1312  av_get_pix_fmt_name(dstFormat));
1313  flags |= SWS_FULL_CHR_H_INT;
1314  c->flags = flags;
1315  }
1316  }
1317  if (flags & SWS_FULL_CHR_H_INT) {
1318  if (c->dither == SWS_DITHER_BAYER) {
1319  av_log(c, AV_LOG_DEBUG,
1320  "Ordered dither is not supported in full chroma interpolation for destination format '%s'\n",
1321  av_get_pix_fmt_name(dstFormat));
1322  c->dither = SWS_DITHER_ED;
1323  }
1324  }
1325  }
1326  if (isPlanarRGB(dstFormat)) {
1327  if (!(flags & SWS_FULL_CHR_H_INT)) {
1328  av_log(c, AV_LOG_DEBUG,
1329  "%s output is not supported with half chroma resolution, switching to full\n",
1330  av_get_pix_fmt_name(dstFormat));
1331  flags |= SWS_FULL_CHR_H_INT;
1332  c->flags = flags;
1333  }
1334  }
1335 
1336  /* reuse chroma for 2 pixels RGB/BGR unless user wants full
1337  * chroma interpolation */
1338  if (flags & SWS_FULL_CHR_H_INT &&
1339  isAnyRGB(dstFormat) &&
1340  !isPlanarRGB(dstFormat) &&
1341  dstFormat != AV_PIX_FMT_RGBA64LE &&
1342  dstFormat != AV_PIX_FMT_RGBA64BE &&
1343  dstFormat != AV_PIX_FMT_BGRA64LE &&
1344  dstFormat != AV_PIX_FMT_BGRA64BE &&
1345  dstFormat != AV_PIX_FMT_RGB48LE &&
1346  dstFormat != AV_PIX_FMT_RGB48BE &&
1347  dstFormat != AV_PIX_FMT_BGR48LE &&
1348  dstFormat != AV_PIX_FMT_BGR48BE &&
1349  dstFormat != AV_PIX_FMT_RGBA &&
1350  dstFormat != AV_PIX_FMT_ARGB &&
1351  dstFormat != AV_PIX_FMT_BGRA &&
1352  dstFormat != AV_PIX_FMT_ABGR &&
1353  dstFormat != AV_PIX_FMT_RGB24 &&
1354  dstFormat != AV_PIX_FMT_BGR24 &&
1355  dstFormat != AV_PIX_FMT_BGR4_BYTE &&
1356  dstFormat != AV_PIX_FMT_RGB4_BYTE &&
1357  dstFormat != AV_PIX_FMT_BGR8 &&
1358  dstFormat != AV_PIX_FMT_RGB8
1359  ) {
1361  "full chroma interpolation for destination format '%s' not yet implemented\n",
1362  av_get_pix_fmt_name(dstFormat));
1363  flags &= ~SWS_FULL_CHR_H_INT;
1364  c->flags = flags;
1365  }
1366  if (isAnyRGB(dstFormat) && !(flags & SWS_FULL_CHR_H_INT))
1367  c->chrDstHSubSample = 1;
1368 
1369  // drop some chroma lines if the user wants it
1370  c->vChrDrop = (flags & SWS_SRC_V_CHR_DROP_MASK) >>
1372  c->chrSrcVSubSample += c->vChrDrop;
1373 
1374  /* drop every other pixel for chroma calculation unless user
1375  * wants full chroma */
1376  if (isAnyRGB(srcFormat) && !(flags & SWS_FULL_CHR_H_INP) &&
1377  srcFormat != AV_PIX_FMT_RGB8 && srcFormat != AV_PIX_FMT_BGR8 &&
1378  srcFormat != AV_PIX_FMT_RGB4 && srcFormat != AV_PIX_FMT_BGR4 &&
1379  srcFormat != AV_PIX_FMT_RGB4_BYTE && srcFormat != AV_PIX_FMT_BGR4_BYTE &&
1380  srcFormat != AV_PIX_FMT_GBRP9BE && srcFormat != AV_PIX_FMT_GBRP9LE &&
1381  srcFormat != AV_PIX_FMT_GBRP10BE && srcFormat != AV_PIX_FMT_GBRP10LE &&
1382  srcFormat != AV_PIX_FMT_GBRAP10BE && srcFormat != AV_PIX_FMT_GBRAP10LE &&
1383  srcFormat != AV_PIX_FMT_GBRP12BE && srcFormat != AV_PIX_FMT_GBRP12LE &&
1384  srcFormat != AV_PIX_FMT_GBRAP12BE && srcFormat != AV_PIX_FMT_GBRAP12LE &&
1385  srcFormat != AV_PIX_FMT_GBRP14BE && srcFormat != AV_PIX_FMT_GBRP14LE &&
1386  srcFormat != AV_PIX_FMT_GBRP16BE && srcFormat != AV_PIX_FMT_GBRP16LE &&
1387  srcFormat != AV_PIX_FMT_GBRAP16BE && srcFormat != AV_PIX_FMT_GBRAP16LE &&
1388  ((dstW >> c->chrDstHSubSample) <= (srcW >> 1) ||
1389  (flags & SWS_FAST_BILINEAR)))
1390  c->chrSrcHSubSample = 1;
1391 
1392  // Note the AV_CEIL_RSHIFT is so that we always round toward +inf.
1393  c->chrSrcW = AV_CEIL_RSHIFT(srcW, c->chrSrcHSubSample);
1394  c->chrSrcH = AV_CEIL_RSHIFT(srcH, c->chrSrcVSubSample);
1395  c->chrDstW = AV_CEIL_RSHIFT(dstW, c->chrDstHSubSample);
1396  c->chrDstH = AV_CEIL_RSHIFT(dstH, c->chrDstVSubSample);
1397 
1398  FF_ALLOCZ_OR_GOTO(c, c->formatConvBuffer, FFALIGN(srcW*2+78, 16) * 2, fail);
1399 
1400  c->srcBpc = desc_src->comp[0].depth;
1401  if (c->srcBpc < 8)
1402  c->srcBpc = 8;
1403  c->dstBpc = desc_dst->comp[0].depth;
1404  if (c->dstBpc < 8)
1405  c->dstBpc = 8;
1406  if (isAnyRGB(srcFormat) || srcFormat == AV_PIX_FMT_PAL8)
1407  c->srcBpc = 16;
1408  if (c->dstBpc == 16)
1409  dst_stride <<= 1;
1410 
1411  if (INLINE_MMXEXT(cpu_flags) && c->srcBpc == 8 && c->dstBpc <= 14) {
1412  c->canMMXEXTBeUsed = dstW >= srcW && (dstW & 31) == 0 &&
1413  c->chrDstW >= c->chrSrcW &&
1414  (srcW & 15) == 0;
1415  if (!c->canMMXEXTBeUsed && dstW >= srcW && c->chrDstW >= c->chrSrcW && (srcW & 15) == 0
1416 
1417  && (flags & SWS_FAST_BILINEAR)) {
1418  if (flags & SWS_PRINT_INFO)
1419  av_log(c, AV_LOG_INFO,
1420  "output width is not a multiple of 32 -> no MMXEXT scaler\n");
1421  }
1422  if (usesHFilter || isNBPS(c->srcFormat) || is16BPS(c->srcFormat) || isAnyRGB(c->srcFormat))
1423  c->canMMXEXTBeUsed = 0;
1424  } else
1425  c->canMMXEXTBeUsed = 0;
1426 
1427  c->chrXInc = (((int64_t)c->chrSrcW << 16) + (c->chrDstW >> 1)) / c->chrDstW;
1428  c->chrYInc = (((int64_t)c->chrSrcH << 16) + (c->chrDstH >> 1)) / c->chrDstH;
1429 
1430  /* Match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src
1431  * to pixel n-2 of dst, but only for the FAST_BILINEAR mode otherwise do
1432  * correct scaling.
1433  * n-2 is the last chrominance sample available.
1434  * This is not perfect, but no one should notice the difference, the more
1435  * correct variant would be like the vertical one, but that would require
1436  * some special code for the first and last pixel */
1437  if (flags & SWS_FAST_BILINEAR) {
1438  if (c->canMMXEXTBeUsed) {
1439  c->lumXInc += 20;
1440  c->chrXInc += 20;
1441  }
1442  // we don't use the x86 asm scaler if MMX is available
1443  else if (INLINE_MMX(cpu_flags) && c->dstBpc <= 14) {
1444  c->lumXInc = ((int64_t)(srcW - 2) << 16) / (dstW - 2) - 20;
1445  c->chrXInc = ((int64_t)(c->chrSrcW - 2) << 16) / (c->chrDstW - 2) - 20;
1446  }
1447  }
1448 
1449  // hardcoded for now
1450  c->gamma_value = 2.2;
1451  tmpFmt = AV_PIX_FMT_RGBA64LE;
1452 
1453 
1454  if (!unscaled && c->gamma_flag && (srcFormat != tmpFmt || dstFormat != tmpFmt)) {
1455  SwsContext *c2;
1456  c->cascaded_context[0] = NULL;
1457 
1459  srcW, srcH, tmpFmt, 64);
1460  if (ret < 0)
1461  return ret;
1462 
1463  c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1464  srcW, srcH, tmpFmt,
1465  flags, NULL, NULL, c->param);
1466  if (!c->cascaded_context[0]) {
1467  return -1;
1468  }
1469 
1470  c->cascaded_context[1] = sws_getContext(srcW, srcH, tmpFmt,
1471  dstW, dstH, tmpFmt,
1472  flags, srcFilter, dstFilter, c->param);
1473 
1474  if (!c->cascaded_context[1])
1475  return -1;
1476 
1477  c2 = c->cascaded_context[1];
1478  c2->is_internal_gamma = 1;
1479  c2->gamma = alloc_gamma_tbl( c->gamma_value);
1480  c2->inv_gamma = alloc_gamma_tbl(1.f/c->gamma_value);
1481  if (!c2->gamma || !c2->inv_gamma)
1482  return AVERROR(ENOMEM);
1483 
1484  // is_internal_flag is set after creating the context
1485  // to properly create the gamma convert FilterDescriptor
1486  // we have to re-initialize it
1487  ff_free_filters(c2);
1488  if (ff_init_filters(c2) < 0) {
1489  sws_freeContext(c2);
1490  return -1;
1491  }
1492 
1493  c->cascaded_context[2] = NULL;
1494  if (dstFormat != tmpFmt) {
1496  dstW, dstH, tmpFmt, 64);
1497  if (ret < 0)
1498  return ret;
1499 
1500  c->cascaded_context[2] = sws_getContext(dstW, dstH, tmpFmt,
1501  dstW, dstH, dstFormat,
1502  flags, NULL, NULL, c->param);
1503  if (!c->cascaded_context[2])
1504  return -1;
1505  }
1506  return 0;
1507  }
1508 
1509  if (isBayer(srcFormat)) {
1510  if (!unscaled ||
1511  (dstFormat != AV_PIX_FMT_RGB24 && dstFormat != AV_PIX_FMT_YUV420P)) {
1512  enum AVPixelFormat tmpFormat = AV_PIX_FMT_RGB24;
1513 
1515  srcW, srcH, tmpFormat, 64);
1516  if (ret < 0)
1517  return ret;
1518 
1519  c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1520  srcW, srcH, tmpFormat,
1521  flags, srcFilter, NULL, c->param);
1522  if (!c->cascaded_context[0])
1523  return -1;
1524 
1525  c->cascaded_context[1] = sws_getContext(srcW, srcH, tmpFormat,
1526  dstW, dstH, dstFormat,
1527  flags, NULL, dstFilter, c->param);
1528  if (!c->cascaded_context[1])
1529  return -1;
1530  return 0;
1531  }
1532  }
1533 
1534  if (CONFIG_SWSCALE_ALPHA && isALPHA(srcFormat) && !isALPHA(dstFormat)) {
1535  enum AVPixelFormat tmpFormat = alphaless_fmt(srcFormat);
1536 
1537  if (tmpFormat != AV_PIX_FMT_NONE && c->alphablend != SWS_ALPHA_BLEND_NONE)
1538  if (!unscaled ||
1539  dstFormat != tmpFormat ||
1540  usesHFilter || usesVFilter ||
1541  c->srcRange != c->dstRange
1542  ) {
1543  c->cascaded_mainindex = 1;
1545  srcW, srcH, tmpFormat, 64);
1546  if (ret < 0)
1547  return ret;
1548 
1549  c->cascaded_context[0] = sws_alloc_set_opts(srcW, srcH, srcFormat,
1550  srcW, srcH, tmpFormat,
1551  flags, c->param);
1552  if (!c->cascaded_context[0])
1553  return -1;
1555  ret = sws_init_context(c->cascaded_context[0], NULL , NULL);
1556  if (ret < 0)
1557  return ret;
1558 
1559  c->cascaded_context[1] = sws_alloc_set_opts(srcW, srcH, tmpFormat,
1560  dstW, dstH, dstFormat,
1561  flags, c->param);
1562  if (!c->cascaded_context[1])
1563  return -1;
1564 
1565  c->cascaded_context[1]->srcRange = c->srcRange;
1566  c->cascaded_context[1]->dstRange = c->dstRange;
1567  ret = sws_init_context(c->cascaded_context[1], srcFilter , dstFilter);
1568  if (ret < 0)
1569  return ret;
1570 
1571  return 0;
1572  }
1573  }
1574 
1575 #define USE_MMAP (HAVE_MMAP && HAVE_MPROTECT && defined MAP_ANONYMOUS)
1576 
1577  /* precalculate horizontal scaler filter coefficients */
1578  {
1579 #if HAVE_MMXEXT_INLINE
1580 // can't downscale !!!
1581  if (c->canMMXEXTBeUsed && (flags & SWS_FAST_BILINEAR)) {
1583  NULL, NULL, 8);
1585  NULL, NULL, NULL, 4);
1586 
1587 #if USE_MMAP
1589  PROT_READ | PROT_WRITE,
1590  MAP_PRIVATE | MAP_ANONYMOUS,
1591  -1, 0);
1593  PROT_READ | PROT_WRITE,
1594  MAP_PRIVATE | MAP_ANONYMOUS,
1595  -1, 0);
1596 #elif HAVE_VIRTUALALLOC
1597  c->lumMmxextFilterCode = VirtualAlloc(NULL,
1599  MEM_COMMIT,
1600  PAGE_EXECUTE_READWRITE);
1601  c->chrMmxextFilterCode = VirtualAlloc(NULL,
1603  MEM_COMMIT,
1604  PAGE_EXECUTE_READWRITE);
1605 #else
1608 #endif
1609 
1610 #ifdef MAP_ANONYMOUS
1611  if (c->lumMmxextFilterCode == MAP_FAILED || c->chrMmxextFilterCode == MAP_FAILED)
1612 #else
1614 #endif
1615  {
1616  av_log(c, AV_LOG_ERROR, "Failed to allocate MMX2FilterCode\n");
1617  return AVERROR(ENOMEM);
1618  }
1619 
1620  FF_ALLOCZ_OR_GOTO(c, c->hLumFilter, (dstW / 8 + 8) * sizeof(int16_t), fail);
1621  FF_ALLOCZ_OR_GOTO(c, c->hChrFilter, (c->chrDstW / 4 + 8) * sizeof(int16_t), fail);
1622  FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW / 2 / 8 + 8) * sizeof(int32_t), fail);
1623  FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW / 2 / 4 + 8) * sizeof(int32_t), fail);
1624 
1626  c->hLumFilter, (uint32_t*)c->hLumFilterPos, 8);
1628  c->hChrFilter, (uint32_t*)c->hChrFilterPos, 4);
1629 
1630 #if USE_MMAP
1631  if ( mprotect(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize, PROT_EXEC | PROT_READ) == -1
1632  || mprotect(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize, PROT_EXEC | PROT_READ) == -1) {
1633  av_log(c, AV_LOG_ERROR, "mprotect failed, cannot use fast bilinear scaler\n");
1634  goto fail;
1635  }
1636 #endif
1637  } else
1638 #endif /* HAVE_MMXEXT_INLINE */
1639  {
1640  const int filterAlign = X86_MMX(cpu_flags) ? 4 :
1641  PPC_ALTIVEC(cpu_flags) ? 8 :
1642  have_neon(cpu_flags) ? 8 : 1;
1643 
1644  if ((ret = initFilter(&c->hLumFilter, &c->hLumFilterPos,
1645  &c->hLumFilterSize, c->lumXInc,
1646  srcW, dstW, filterAlign, 1 << 14,
1647  (flags & SWS_BICUBLIN) ? (flags | SWS_BICUBIC) : flags,
1648  cpu_flags, srcFilter->lumH, dstFilter->lumH,
1649  c->param,
1650  get_local_pos(c, 0, 0, 0),
1651  get_local_pos(c, 0, 0, 0))) < 0)
1652  goto fail;
1653  if ((ret = initFilter(&c->hChrFilter, &c->hChrFilterPos,
1654  &c->hChrFilterSize, c->chrXInc,
1655  c->chrSrcW, c->chrDstW, filterAlign, 1 << 14,
1656  (flags & SWS_BICUBLIN) ? (flags | SWS_BILINEAR) : flags,
1657  cpu_flags, srcFilter->chrH, dstFilter->chrH,
1658  c->param,
1660  get_local_pos(c, c->chrDstHSubSample, c->dst_h_chr_pos, 0))) < 0)
1661  goto fail;
1662  }
1663  } // initialize horizontal stuff
1664 
1665  /* precalculate vertical scaler filter coefficients */
1666  {
1667  const int filterAlign = X86_MMX(cpu_flags) ? 2 :
1668  PPC_ALTIVEC(cpu_flags) ? 8 :
1669  have_neon(cpu_flags) ? 2 : 1;
1670 
1671  if ((ret = initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize,
1672  c->lumYInc, srcH, dstH, filterAlign, (1 << 12),
1673  (flags & SWS_BICUBLIN) ? (flags | SWS_BICUBIC) : flags,
1674  cpu_flags, srcFilter->lumV, dstFilter->lumV,
1675  c->param,
1676  get_local_pos(c, 0, 0, 1),
1677  get_local_pos(c, 0, 0, 1))) < 0)
1678  goto fail;
1679  if ((ret = initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize,
1680  c->chrYInc, c->chrSrcH, c->chrDstH,
1681  filterAlign, (1 << 12),
1682  (flags & SWS_BICUBLIN) ? (flags | SWS_BILINEAR) : flags,
1683  cpu_flags, srcFilter->chrV, dstFilter->chrV,
1684  c->param,
1686  get_local_pos(c, c->chrDstVSubSample, c->dst_v_chr_pos, 1))) < 0)
1687 
1688  goto fail;
1689 
1690 #if HAVE_ALTIVEC
1691  FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof(vector signed short) * c->vLumFilterSize * c->dstH, fail);
1692  FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof(vector signed short) * c->vChrFilterSize * c->chrDstH, fail);
1693 
1694  for (i = 0; i < c->vLumFilterSize * c->dstH; i++) {
1695  int j;
1696  short *p = (short *)&c->vYCoeffsBank[i];
1697  for (j = 0; j < 8; j++)
1698  p[j] = c->vLumFilter[i];
1699  }
1700 
1701  for (i = 0; i < c->vChrFilterSize * c->chrDstH; i++) {
1702  int j;
1703  short *p = (short *)&c->vCCoeffsBank[i];
1704  for (j = 0; j < 8; j++)
1705  p[j] = c->vChrFilter[i];
1706  }
1707 #endif
1708  }
1709 
1710  for (i = 0; i < 4; i++)
1711  FF_ALLOCZ_OR_GOTO(c, c->dither_error[i], (c->dstW+2) * sizeof(int), fail);
1712 
1713  c->needAlpha = (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) ? 1 : 0;
1714 
1715  // 64 / c->scalingBpp is the same as 16 / sizeof(scaling_intermediate)
1716  c->uv_off = (dst_stride>>1) + 64 / (c->dstBpc &~ 7);
1717  c->uv_offx2 = dst_stride + 16;
1718 
1719  av_assert0(c->chrDstH <= dstH);
1720 
1721  if (flags & SWS_PRINT_INFO) {
1722  const char *scaler = NULL, *cpucaps;
1723 
1724  for (i = 0; i < FF_ARRAY_ELEMS(scale_algorithms); i++) {
1725  if (flags & scale_algorithms[i].flag) {
1726  scaler = scale_algorithms[i].description;
1727  break;
1728  }
1729  }
1730  if (!scaler)
1731  scaler = "ehh flags invalid?!";
1732  av_log(c, AV_LOG_INFO, "%s scaler, from %s to %s%s ",
1733  scaler,
1734  av_get_pix_fmt_name(srcFormat),
1735 #ifdef DITHER1XBPP
1736  dstFormat == AV_PIX_FMT_BGR555 || dstFormat == AV_PIX_FMT_BGR565 ||
1737  dstFormat == AV_PIX_FMT_RGB444BE || dstFormat == AV_PIX_FMT_RGB444LE ||
1738  dstFormat == AV_PIX_FMT_BGR444BE || dstFormat == AV_PIX_FMT_BGR444LE ?
1739  "dithered " : "",
1740 #else
1741  "",
1742 #endif
1743  av_get_pix_fmt_name(dstFormat));
1744 
1745  if (INLINE_MMXEXT(cpu_flags))
1746  cpucaps = "MMXEXT";
1747  else if (INLINE_AMD3DNOW(cpu_flags))
1748  cpucaps = "3DNOW";
1749  else if (INLINE_MMX(cpu_flags))
1750  cpucaps = "MMX";
1751  else if (PPC_ALTIVEC(cpu_flags))
1752  cpucaps = "AltiVec";
1753  else
1754  cpucaps = "C";
1755 
1756  av_log(c, AV_LOG_INFO, "using %s\n", cpucaps);
1757 
1758  av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
1759  av_log(c, AV_LOG_DEBUG,
1760  "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1761  c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
1762  av_log(c, AV_LOG_DEBUG,
1763  "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1764  c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH,
1765  c->chrXInc, c->chrYInc);
1766  }
1767 
1768  /* alpha blend special case, note this has been split via cascaded contexts if its scaled */
1769  if (unscaled && !usesHFilter && !usesVFilter &&
1771  isALPHA(srcFormat) &&
1772  (c->srcRange == c->dstRange || isAnyRGB(dstFormat)) &&
1773  alphaless_fmt(srcFormat) == dstFormat
1774  ) {
1776 
1777  if (flags & SWS_PRINT_INFO)
1778  av_log(c, AV_LOG_INFO,
1779  "using alpha blendaway %s -> %s special converter\n",
1780  av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
1781  return 0;
1782  }
1783 
1784  /* unscaled special cases */
1785  if (unscaled && !usesHFilter && !usesVFilter &&
1786  (c->srcRange == c->dstRange || isAnyRGB(dstFormat))) {
1788 
1789  if (c->swscale) {
1790  if (flags & SWS_PRINT_INFO)
1791  av_log(c, AV_LOG_INFO,
1792  "using unscaled %s -> %s special converter\n",
1793  av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
1794  return 0;
1795  }
1796  }
1797 
1798  c->swscale = ff_getSwsFunc(c);
1799  return ff_init_filters(c);
1800 fail: // FIXME replace things by appropriate error codes
1801  if (ret == RETCODE_USE_CASCADE) {
1802  int tmpW = sqrt(srcW * (int64_t)dstW);
1803  int tmpH = sqrt(srcH * (int64_t)dstH);
1804  enum AVPixelFormat tmpFormat = AV_PIX_FMT_YUV420P;
1805 
1806  if (isALPHA(srcFormat))
1807  tmpFormat = AV_PIX_FMT_YUVA420P;
1808 
1809  if (srcW*(int64_t)srcH <= 4LL*dstW*dstH)
1810  return AVERROR(EINVAL);
1811 
1813  tmpW, tmpH, tmpFormat, 64);
1814  if (ret < 0)
1815  return ret;
1816 
1817  c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
1818  tmpW, tmpH, tmpFormat,
1819  flags, srcFilter, NULL, c->param);
1820  if (!c->cascaded_context[0])
1821  return -1;
1822 
1823  c->cascaded_context[1] = sws_getContext(tmpW, tmpH, tmpFormat,
1824  dstW, dstH, dstFormat,
1825  flags, NULL, dstFilter, c->param);
1826  if (!c->cascaded_context[1])
1827  return -1;
1828  return 0;
1829  }
1830  return -1;
1831 }
1832 
1833 SwsContext *sws_alloc_set_opts(int srcW, int srcH, enum AVPixelFormat srcFormat,
1834  int dstW, int dstH, enum AVPixelFormat dstFormat,
1835  int flags, const double *param)
1836 {
1837  SwsContext *c;
1838 
1839  if (!(c = sws_alloc_context()))
1840  return NULL;
1841 
1842  c->flags = flags;
1843  c->srcW = srcW;
1844  c->srcH = srcH;
1845  c->dstW = dstW;
1846  c->dstH = dstH;
1847  c->srcFormat = srcFormat;
1848  c->dstFormat = dstFormat;
1849 
1850  if (param) {
1851  c->param[0] = param[0];
1852  c->param[1] = param[1];
1853  }
1854 
1855  return c;
1856 }
1857 
1858 SwsContext *sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat,
1859  int dstW, int dstH, enum AVPixelFormat dstFormat,
1860  int flags, SwsFilter *srcFilter,
1861  SwsFilter *dstFilter, const double *param)
1862 {
1863  SwsContext *c;
1864 
1865  c = sws_alloc_set_opts(srcW, srcH, srcFormat,
1866  dstW, dstH, dstFormat,
1867  flags, param);
1868  if (!c)
1869  return NULL;
1870 
1871  if (sws_init_context(c, srcFilter, dstFilter) < 0) {
1872  sws_freeContext(c);
1873  return NULL;
1874  }
1875 
1876  return c;
1877 }
1878 
1879 static int isnan_vec(SwsVector *a)
1880 {
1881  int i;
1882  for (i=0; i<a->length; i++)
1883  if (isnan(a->coeff[i]))
1884  return 1;
1885  return 0;
1886 }
1887 
1888 static void makenan_vec(SwsVector *a)
1889 {
1890  int i;
1891  for (i=0; i<a->length; i++)
1892  a->coeff[i] = NAN;
1893 }
1894 
1895 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
1896  float lumaSharpen, float chromaSharpen,
1897  float chromaHShift, float chromaVShift,
1898  int verbose)
1899 {
1900  SwsFilter *filter = av_malloc(sizeof(SwsFilter));
1901  if (!filter)
1902  return NULL;
1903 
1904  if (lumaGBlur != 0.0) {
1905  filter->lumH = sws_getGaussianVec(lumaGBlur, 3.0);
1906  filter->lumV = sws_getGaussianVec(lumaGBlur, 3.0);
1907  } else {
1908  filter->lumH = sws_getIdentityVec();
1909  filter->lumV = sws_getIdentityVec();
1910  }
1911 
1912  if (chromaGBlur != 0.0) {
1913  filter->chrH = sws_getGaussianVec(chromaGBlur, 3.0);
1914  filter->chrV = sws_getGaussianVec(chromaGBlur, 3.0);
1915  } else {
1916  filter->chrH = sws_getIdentityVec();
1917  filter->chrV = sws_getIdentityVec();
1918  }
1919 
1920  if (!filter->lumH || !filter->lumV || !filter->chrH || !filter->chrV)
1921  goto fail;
1922 
1923  if (chromaSharpen != 0.0) {
1924  SwsVector *id = sws_getIdentityVec();
1925  if (!id)
1926  goto fail;
1927  sws_scaleVec(filter->chrH, -chromaSharpen);
1928  sws_scaleVec(filter->chrV, -chromaSharpen);
1929  sws_addVec(filter->chrH, id);
1930  sws_addVec(filter->chrV, id);
1931  sws_freeVec(id);
1932  }
1933 
1934  if (lumaSharpen != 0.0) {
1935  SwsVector *id = sws_getIdentityVec();
1936  if (!id)
1937  goto fail;
1938  sws_scaleVec(filter->lumH, -lumaSharpen);
1939  sws_scaleVec(filter->lumV, -lumaSharpen);
1940  sws_addVec(filter->lumH, id);
1941  sws_addVec(filter->lumV, id);
1942  sws_freeVec(id);
1943  }
1944 
1945  if (chromaHShift != 0.0)
1946  sws_shiftVec(filter->chrH, (int)(chromaHShift + 0.5));
1947 
1948  if (chromaVShift != 0.0)
1949  sws_shiftVec(filter->chrV, (int)(chromaVShift + 0.5));
1950 
1951  sws_normalizeVec(filter->chrH, 1.0);
1952  sws_normalizeVec(filter->chrV, 1.0);
1953  sws_normalizeVec(filter->lumH, 1.0);
1954  sws_normalizeVec(filter->lumV, 1.0);
1955 
1956  if (isnan_vec(filter->chrH) ||
1957  isnan_vec(filter->chrV) ||
1958  isnan_vec(filter->lumH) ||
1959  isnan_vec(filter->lumV))
1960  goto fail;
1961 
1962  if (verbose)
1963  sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);
1964  if (verbose)
1965  sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);
1966 
1967  return filter;
1968 
1969 fail:
1970  sws_freeVec(filter->lumH);
1971  sws_freeVec(filter->lumV);
1972  sws_freeVec(filter->chrH);
1973  sws_freeVec(filter->chrV);
1974  av_freep(&filter);
1975  return NULL;
1976 }
1977 
1979 {
1980  SwsVector *vec;
1981 
1982  if(length <= 0 || length > INT_MAX/ sizeof(double))
1983  return NULL;
1984 
1985  vec = av_malloc(sizeof(SwsVector));
1986  if (!vec)
1987  return NULL;
1988  vec->length = length;
1989  vec->coeff = av_malloc(sizeof(double) * length);
1990  if (!vec->coeff)
1991  av_freep(&vec);
1992  return vec;
1993 }
1994 
1995 SwsVector *sws_getGaussianVec(double variance, double quality)
1996 {
1997  const int length = (int)(variance * quality + 0.5) | 1;
1998  int i;
1999  double middle = (length - 1) * 0.5;
2000  SwsVector *vec;
2001 
2002  if(variance < 0 || quality < 0)
2003  return NULL;
2004 
2005  vec = sws_allocVec(length);
2006 
2007  if (!vec)
2008  return NULL;
2009 
2010  for (i = 0; i < length; i++) {
2011  double dist = i - middle;
2012  vec->coeff[i] = exp(-dist * dist / (2 * variance * variance)) /
2013  sqrt(2 * variance * M_PI);
2014  }
2015 
2016  sws_normalizeVec(vec, 1.0);
2017 
2018  return vec;
2019 }
2020 
2021 /**
2022  * Allocate and return a vector with length coefficients, all
2023  * with the same value c.
2024  */
2025 #if !FF_API_SWS_VECTOR
2026 static
2027 #endif
2029 {
2030  int i;
2031  SwsVector *vec = sws_allocVec(length);
2032 
2033  if (!vec)
2034  return NULL;
2035 
2036  for (i = 0; i < length; i++)
2037  vec->coeff[i] = c;
2038 
2039  return vec;
2040 }
2041 
2042 /**
2043  * Allocate and return a vector with just one coefficient, with
2044  * value 1.0.
2045  */
2046 #if !FF_API_SWS_VECTOR
2047 static
2048 #endif
2050 {
2051  return sws_getConstVec(1.0, 1);
2052 }
2053 
2054 static double sws_dcVec(SwsVector *a)
2055 {
2056  int i;
2057  double sum = 0;
2058 
2059  for (i = 0; i < a->length; i++)
2060  sum += a->coeff[i];
2061 
2062  return sum;
2063 }
2064 
2065 void sws_scaleVec(SwsVector *a, double scalar)
2066 {
2067  int i;
2068 
2069  for (i = 0; i < a->length; i++)
2070  a->coeff[i] *= scalar;
2071 }
2072 
2074 {
2075  sws_scaleVec(a, height / sws_dcVec(a));
2076 }
2077 
2078 #if FF_API_SWS_VECTOR
2080 {
2081  int length = a->length + b->length - 1;
2082  int i, j;
2083  SwsVector *vec = sws_getConstVec(0.0, length);
2084 
2085  if (!vec)
2086  return NULL;
2087 
2088  for (i = 0; i < a->length; i++) {
2089  for (j = 0; j < b->length; j++) {
2090  vec->coeff[i + j] += a->coeff[i] * b->coeff[j];
2091  }
2092  }
2093 
2094  return vec;
2095 }
2096 #endif
2097 
2099 {
2100  int length = FFMAX(a->length, b->length);
2101  int i;
2102  SwsVector *vec = sws_getConstVec(0.0, length);
2103 
2104  if (!vec)
2105  return NULL;
2106 
2107  for (i = 0; i < a->length; i++)
2108  vec->coeff[i + (length - 1) / 2 - (a->length - 1) / 2] += a->coeff[i];
2109  for (i = 0; i < b->length; i++)
2110  vec->coeff[i + (length - 1) / 2 - (b->length - 1) / 2] += b->coeff[i];
2111 
2112  return vec;
2113 }
2114 
2115 #if FF_API_SWS_VECTOR
2117 {
2118  int length = FFMAX(a->length, b->length);
2119  int i;
2120  SwsVector *vec = sws_getConstVec(0.0, length);
2121 
2122  if (!vec)
2123  return NULL;
2124 
2125  for (i = 0; i < a->length; i++)
2126  vec->coeff[i + (length - 1) / 2 - (a->length - 1) / 2] += a->coeff[i];
2127  for (i = 0; i < b->length; i++)
2128  vec->coeff[i + (length - 1) / 2 - (b->length - 1) / 2] -= b->coeff[i];
2129 
2130  return vec;
2131 }
2132 #endif
2133 
2134 /* shift left / or right if "shift" is negative */
2136 {
2137  int length = a->length + FFABS(shift) * 2;
2138  int i;
2139  SwsVector *vec = sws_getConstVec(0.0, length);
2140 
2141  if (!vec)
2142  return NULL;
2143 
2144  for (i = 0; i < a->length; i++) {
2145  vec->coeff[i + (length - 1) / 2 -
2146  (a->length - 1) / 2 - shift] = a->coeff[i];
2147  }
2148 
2149  return vec;
2150 }
2151 
2152 #if !FF_API_SWS_VECTOR
2153 static
2154 #endif
2156 {
2157  SwsVector *shifted = sws_getShiftedVec(a, shift);
2158  if (!shifted) {
2159  makenan_vec(a);
2160  return;
2161  }
2162  av_free(a->coeff);
2163  a->coeff = shifted->coeff;
2164  a->length = shifted->length;
2165  av_free(shifted);
2166 }
2167 
2168 #if !FF_API_SWS_VECTOR
2169 static
2170 #endif
2172 {
2173  SwsVector *sum = sws_sumVec(a, b);
2174  if (!sum) {
2175  makenan_vec(a);
2176  return;
2177  }
2178  av_free(a->coeff);
2179  a->coeff = sum->coeff;
2180  a->length = sum->length;
2181  av_free(sum);
2182 }
2183 
2184 #if FF_API_SWS_VECTOR
2186 {
2187  SwsVector *diff = sws_diffVec(a, b);
2188  if (!diff) {
2189  makenan_vec(a);
2190  return;
2191  }
2192  av_free(a->coeff);
2193  a->coeff = diff->coeff;
2194  a->length = diff->length;
2195  av_free(diff);
2196 }
2197 
2199 {
2200  SwsVector *conv = sws_getConvVec(a, b);
2201  if (!conv) {
2202  makenan_vec(a);
2203  return;
2204  }
2205  av_free(a->coeff);
2206  a->coeff = conv->coeff;
2207  a->length = conv->length;
2208  av_free(conv);
2209 }
2210 
2212 {
2213  SwsVector *vec = sws_allocVec(a->length);
2214 
2215  if (!vec)
2216  return NULL;
2217 
2218  memcpy(vec->coeff, a->coeff, a->length * sizeof(*a->coeff));
2219 
2220  return vec;
2221 }
2222 #endif
2223 
2224 /**
2225  * Print with av_log() a textual representation of the vector a
2226  * if log_level <= av_log_level.
2227  */
2228 #if !FF_API_SWS_VECTOR
2229 static
2230 #endif
2231 void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)
2232 {
2233  int i;
2234  double max = 0;
2235  double min = 0;
2236  double range;
2237 
2238  for (i = 0; i < a->length; i++)
2239  if (a->coeff[i] > max)
2240  max = a->coeff[i];
2241 
2242  for (i = 0; i < a->length; i++)
2243  if (a->coeff[i] < min)
2244  min = a->coeff[i];
2245 
2246  range = max - min;
2247 
2248  for (i = 0; i < a->length; i++) {
2249  int x = (int)((a->coeff[i] - min) * 60.0 / range + 0.5);
2250  av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);
2251  for (; x > 0; x--)
2252  av_log(log_ctx, log_level, " ");
2253  av_log(log_ctx, log_level, "|\n");
2254  }
2255 }
2256 
2258 {
2259  if (!a)
2260  return;
2261  av_freep(&a->coeff);
2262  a->length = 0;
2263  av_free(a);
2264 }
2265 
2267 {
2268  if (!filter)
2269  return;
2270 
2271  sws_freeVec(filter->lumH);
2272  sws_freeVec(filter->lumV);
2273  sws_freeVec(filter->chrH);
2274  sws_freeVec(filter->chrV);
2275  av_free(filter);
2276 }
2277 
2279 {
2280  int i;
2281  if (!c)
2282  return;
2283 
2284  for (i = 0; i < 4; i++)
2285  av_freep(&c->dither_error[i]);
2286 
2287  av_freep(&c->vLumFilter);
2288  av_freep(&c->vChrFilter);
2289  av_freep(&c->hLumFilter);
2290  av_freep(&c->hChrFilter);
2291 #if HAVE_ALTIVEC
2292  av_freep(&c->vYCoeffsBank);
2293  av_freep(&c->vCCoeffsBank);
2294 #endif
2295 
2296  av_freep(&c->vLumFilterPos);
2297  av_freep(&c->vChrFilterPos);
2298  av_freep(&c->hLumFilterPos);
2299  av_freep(&c->hChrFilterPos);
2300 
2301 #if HAVE_MMX_INLINE
2302 #if USE_MMAP
2303  if (c->lumMmxextFilterCode)
2305  if (c->chrMmxextFilterCode)
2307 #elif HAVE_VIRTUALALLOC
2308  if (c->lumMmxextFilterCode)
2309  VirtualFree(c->lumMmxextFilterCode, 0, MEM_RELEASE);
2310  if (c->chrMmxextFilterCode)
2311  VirtualFree(c->chrMmxextFilterCode, 0, MEM_RELEASE);
2312 #else
2315 #endif
2318 #endif /* HAVE_MMX_INLINE */
2319 
2320  av_freep(&c->yuvTable);
2322 
2326  memset(c->cascaded_context, 0, sizeof(c->cascaded_context));
2327  av_freep(&c->cascaded_tmp[0]);
2328  av_freep(&c->cascaded1_tmp[0]);
2329 
2330  av_freep(&c->gamma);
2331  av_freep(&c->inv_gamma);
2332 
2333  ff_free_filters(c);
2334 
2335  av_free(c);
2336 }
2337 
2338 struct SwsContext *sws_getCachedContext(struct SwsContext *context, int srcW,
2339  int srcH, enum AVPixelFormat srcFormat,
2340  int dstW, int dstH,
2341  enum AVPixelFormat dstFormat, int flags,
2342  SwsFilter *srcFilter,
2343  SwsFilter *dstFilter,
2344  const double *param)
2345 {
2346  static const double default_param[2] = { SWS_PARAM_DEFAULT,
2348  int64_t src_h_chr_pos = -513, dst_h_chr_pos = -513,
2349  src_v_chr_pos = -513, dst_v_chr_pos = -513;
2350 
2351  if (!param)
2352  param = default_param;
2353 
2354  if (context &&
2355  (context->srcW != srcW ||
2356  context->srcH != srcH ||
2357  context->srcFormat != srcFormat ||
2358  context->dstW != dstW ||
2359  context->dstH != dstH ||
2360  context->dstFormat != dstFormat ||
2361  context->flags != flags ||
2362  context->param[0] != param[0] ||
2363  context->param[1] != param[1])) {
2364 
2365  av_opt_get_int(context, "src_h_chr_pos", 0, &src_h_chr_pos);
2366  av_opt_get_int(context, "src_v_chr_pos", 0, &src_v_chr_pos);
2367  av_opt_get_int(context, "dst_h_chr_pos", 0, &dst_h_chr_pos);
2368  av_opt_get_int(context, "dst_v_chr_pos", 0, &dst_v_chr_pos);
2369  sws_freeContext(context);
2370  context = NULL;
2371  }
2372 
2373  if (!context) {
2374  if (!(context = sws_alloc_context()))
2375  return NULL;
2376  context->srcW = srcW;
2377  context->srcH = srcH;
2378  context->srcFormat = srcFormat;
2379  context->dstW = dstW;
2380  context->dstH = dstH;
2381  context->dstFormat = dstFormat;
2382  context->flags = flags;
2383  context->param[0] = param[0];
2384  context->param[1] = param[1];
2385 
2386  av_opt_set_int(context, "src_h_chr_pos", src_h_chr_pos, 0);
2387  av_opt_set_int(context, "src_v_chr_pos", src_v_chr_pos, 0);
2388  av_opt_set_int(context, "dst_h_chr_pos", dst_h_chr_pos, 0);
2389  av_opt_set_int(context, "dst_v_chr_pos", dst_v_chr_pos, 0);
2390 
2391  if (sws_init_context(context, srcFilter, dstFilter) < 0) {
2392  sws_freeContext(context);
2393  return NULL;
2394  }
2395  }
2396  return context;
2397 }
packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
Definition: pixfmt.h:82
SwsVector * chrV
Definition: swscale.h:119
uint8_t is_supported_out
Definition: utils.c:94
planar GBR 4:4:4:4 40bpp, little-endian
Definition: pixfmt.h:305
#define NULL
Definition: coverity.c:32
int sws_isSupportedOutput(enum AVPixelFormat pix_fmt)
Return a positive value if pix_fmt is a supported output format, 0 otherwise.
Definition: utils.c:263
static const FormatEntry format_entries[AV_PIX_FMT_NB]
Definition: utils.c:98
planar YUV 4:2:2, 18bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
Definition: pixfmt.h:177
planar YUV 4:4:0,20bpp, (1 Cr & Cb sample per 1x2 Y samples), little-endian
Definition: pixfmt.h:289
const char * s
Definition: avisynth_c.h:768
planar YUV 4:4:4,42bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
Definition: pixfmt.h:266
static enum AVPixelFormat pix_fmt
static SwsVector * sws_sumVec(SwsVector *a, SwsVector *b)
Definition: utils.c:2098
av_cold void ff_yuv2rgb_init_tables_ppc(SwsContext *c, const int inv_table[4], int brightness, int contrast, int saturation)
static int shift(int a, int b)
Definition: sonic.c:82
static int handle_0alpha(enum AVPixelFormat *format)
Definition: utils.c:1035
planar YUV 4:2:0,21bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
Definition: pixfmt.h:259
#define SWS_SRC_V_CHR_DROP_MASK
Definition: swscale.h:70
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2332
int chrSrcH
Height of source chroma planes.
#define FF_ALLOCZ_ARRAY_OR_GOTO(ctx, p, nelem, elsize, label)
Definition: internal.h:157
#define SWS_X
Definition: swscale.h:61
int ff_free_filters(SwsContext *c)
Definition: slice.c:377
static av_always_inline int isPlanarRGB(enum AVPixelFormat pix_fmt)
#define LIBSWSCALE_VERSION_MICRO
Definition: version.h:31
#define RV_IDX
#define SWS_BICUBIC
Definition: swscale.h:60
uint8_t * chrMmxextFilterCode
Runtime-generated MMXEXT horizontal fast bilinear scaler code for chroma planes.
static void fill_rgb2yuv_table(SwsContext *c, const int table[4], int dstRange)
Definition: utils.c:722
planar YUV 4:2:2,28bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
Definition: pixfmt.h:263
planar YUV 4:2:0, 15bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
Definition: pixfmt.h:170
#define BV_IDX
static int conv(int samples, float **pcm, char *buf, int channels)
Definition: libvorbisdec.c:120
#define C
8 bits gray, 8 bits alpha
Definition: pixfmt.h:154
packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:220
uint8_t * lumMmxextFilterCode
Runtime-generated MMXEXT horizontal fast bilinear scaler code for luma/alpha planes.
const char * fmt
Definition: avisynth_c.h:769
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:67
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
SwsVector * lumV
Definition: swscale.h:117
int16_t * rgbgamma
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:64
packed RGB 1:2:1 bitstream, 4bpp, (msb)1B 2G 1R(lsb), a byte contains two pixels, the first pixel in ...
Definition: pixfmt.h:85
static av_cold int get_local_pos(SwsContext *s, int chr_subsample, int pos, int dir)
Definition: utils.c:288
SwsAlphaBlend alphablend
int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation)
Definition: utils.c:987
int av_image_alloc(uint8_t *pointers[4], int linesizes[4], int w, int h, enum AVPixelFormat pix_fmt, int align)
Allocate an image with size w and h and pixel format pix_fmt, and fill pointers and linesizes accordi...
Definition: imgutils.c:191
planar YUV 4:4:4, 27bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
Definition: pixfmt.h:173
int acc
Definition: yuv2rgb.c:546
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
Definition: pixdesc.c:2284
SwsVector * sws_getGaussianVec(double variance, double quality)
Return a normalized Gaussian curve used to filter stuff quality = 3 is high quality, lower is lower quality.
Definition: utils.c:1995
planar YUV 4:4:4,36bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
Definition: pixfmt.h:264
bayer, GBGB..(odd line), RGRG..(even line), 8-bit samples */
Definition: pixfmt.h:276
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1293
int vChrDrop
Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user...
bayer, GRGR..(odd line), BGBG..(even line), 8-bit samples */
Definition: pixfmt.h:277
int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4], int fullRange, int brightness, int contrast, int saturation)
Definition: yuv2rgb.c:765
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:180
packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:219
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined ...
Definition: pixfmt.h:116
#define SWS_BICUBLIN
Definition: swscale.h:64
int16_t * rgbgammainv
const char * b
Definition: vf_curves.c:113
int flag
Definition: cpu.c:34
static double getSplineCoeff(double a, double b, double c, double d, double dist)
Definition: utils.c:275
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:367
bayer, GRGR..(odd line), BGBG..(even line), 16-bit samples, little-endian */
Definition: pixfmt.h:284
#define GV_IDX
int dstFormatBpp
Number of bits per pixel of the destination pixel format.
int av_log2(unsigned v)
Definition: intmath.c:26
#define AV_PIX_FMT_BGRA64
Definition: pixfmt.h:346
planar YUV 4:4:4 40bpp, (1 Cr & Cb sample per 1x1 Y & A samples, little-endian)
Definition: pixfmt.h:201
static av_always_inline int is16BPS(enum AVPixelFormat pix_fmt)
Convenience header that includes libavutil's core.
static int handle_jpeg(enum AVPixelFormat *format)
Definition: utils.c:1005
int sws_isSupportedEndiannessConversion(enum AVPixelFormat pix_fmt)
Definition: utils.c:269
static int isnan_vec(SwsVector *a)
Definition: utils.c:1879
int16_t * xyzgammainv
packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), little-endian
Definition: pixfmt.h:119
#define SWS_SRC_V_CHR_DROP_SHIFT
Definition: swscale.h:71
const char * swscale_configuration(void)
Return the libswscale build-time configuration.
Definition: utils.c:81
planar GBR 4:4:4 36bpp, little-endian
Definition: pixfmt.h:269
The following 12 formats have the disadvantage of needing 1 format for each bit depth.
Definition: pixfmt.h:167
packed RGB 4:4:4, 16bpp, (msb)4X 4R 4G 4B(lsb), big-endian, X=unused/undefined
Definition: pixfmt.h:151
const int32_t ff_yuv2rgb_coeffs[11][4]
Definition: yuv2rgb.c:49
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
packed BGR 8:8:8, 32bpp, XBGRXBGR... X=unused/undefined
Definition: pixfmt.h:253
int srcRange
0 = MPG YUV range, 1 = JPG YUV range (source image).
bayer, BGBG..(odd line), GRGR..(even line), 8-bit samples */
Definition: pixfmt.h:274
#define RGB_GAMMA
#define SWS_PRINT_INFO
Definition: swscale.h:75
Y , 12bpp, little-endian.
Definition: pixfmt.h:310
enum AVPixelFormat av_pix_fmt_swap_endianness(enum AVPixelFormat pix_fmt)
Utility function to swap the endianness of a pixel format.
Definition: pixdesc.c:2429
planar GBR 4:4:4 36bpp, big-endian
Definition: pixfmt.h:268
planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
Definition: pixfmt.h:139
packed RGB 1:2:1 bitstream, 4bpp, (msb)1R 2G 1B(lsb), a byte contains two pixels, the first pixel in ...
Definition: pixfmt.h:88
Macro definitions for various function/variable attributes.
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
Definition: pixfmt.h:114
int srcH
Height of source luma/alpha planes.
packed RGB 1:2:1, 8bpp, (msb)1B 2G 1R(lsb)
Definition: pixfmt.h:86
#define SWS_BILINEAR
Definition: swscale.h:59
planar YUV 4:2:0 22.5bpp, (1 Cr & Cb sample per 2x2 Y & A samples), little-endian ...
Definition: pixfmt.h:191
void sws_convVec(SwsVector *a, SwsVector *b)
Definition: utils.c:2198
#define RU_IDX
planar GBRA 4:4:4:4 64bpp, big-endian
Definition: pixfmt.h:230
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
planar YUV 4:2:0 40bpp, (1 Cr & Cb sample per 2x2 Y & A samples, big-endian)
Definition: pixfmt.h:202
static uint16_t * alloc_gamma_tbl(double e)
Definition: utils.c:1079
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:102
int chrDstVSubSample
Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination i...
ptrdiff_t uv_off
offset (in pixels) between u and v planes
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
#define av_cold
Definition: attributes.h:82
#define av_malloc(s)
int length
number of coefficients in the vector
Definition: swscale.h:111
av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter, SwsFilter *dstFilter)
Initialize the swscaler context sws_context.
Definition: utils.c:1151
#define SWS_LANCZOS
Definition: swscale.h:67
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
packed RGB 8:8:8, 32bpp, RGBXRGBX... X=unused/undefined
Definition: pixfmt.h:252
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:73
AVOptions.
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as lit...
Definition: pixfmt.h:111
SwsVector * sws_cloneVec(SwsVector *a)
Definition: utils.c:2211
int vChrFilterSize
Vertical filter size for chroma pixels.
bayer, GBGB..(odd line), RGRG..(even line), 16-bit samples, little-endian */
Definition: pixfmt.h:282
bayer, GBGB..(odd line), RGRG..(even line), 16-bit samples, big-endian */
Definition: pixfmt.h:283
Definition: vf_geq.c:46
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:217
packed RGB 4:4:4, 16bpp, (msb)4X 4R 4G 4B(lsb), little-endian, X=unused/undefined ...
Definition: pixfmt.h:150
planar YUV 4:4:4,36bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
Definition: pixfmt.h:265
#define SWS_FULL_CHR_H_INT
Definition: swscale.h:79
static void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len, uint8_t clip)
Definition: cfhd.c:80
int cascaded_tmpStride[4]
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), big-endian
Definition: pixfmt.h:113
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:95
planar YUV 4:2:0 40bpp, (1 Cr & Cb sample per 2x2 Y & A samples, little-endian)
Definition: pixfmt.h:203
#define SWS_FAST_BILINEAR
Definition: swscale.h:58
SwsVector * sws_getConstVec(double c, int length)
Allocate and return a vector with length coefficients, all with the same value c. ...
Definition: utils.c:2028
planar YUV 4:4:0,20bpp, (1 Cr & Cb sample per 1x2 Y samples), big-endian
Definition: pixfmt.h:290
planar GBR 4:4:4 48bpp, big-endian
Definition: pixfmt.h:186
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range...
Definition: pixfmt.h:101
static int flags
Definition: log.c:57
SwsContext * sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
Allocate and return an SwsContext.
Definition: utils.c:1858
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:75
planar YUV 4:4:4 64bpp, (1 Cr & Cb sample per 1x1 Y & A samples, big-endian)
Definition: pixfmt.h:206
#define AV_PIX_FMT_BGR48
Definition: pixfmt.h:342
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int16_t rgb2xyz_matrix[3][4]
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:364
#define isAnyRGB(x)
Y , 10bpp, little-endian.
Definition: pixfmt.h:312
external API header
enum AVPixelFormat dstFormat
Destination pixel format.
#define isALPHA(x)
Definition: swscale.c:51
int ff_sws_alphablendaway(SwsContext *c, const uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dst[], int dstStride[])
Definition: alphablend.c:23
planar YUV 4:4:0,24bpp, (1 Cr & Cb sample per 1x2 Y samples), big-endian
Definition: pixfmt.h:292
uint16_t * inv_gamma
#define A(x)
Definition: vp56_arith.h:28
bayer, BGBG..(odd line), GRGR..(even line), 16-bit samples, little-endian */
Definition: pixfmt.h:278
#define FFALIGN(x, a)
Definition: macros.h:48
int chrSrcHSubSample
Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source imag...
#define av_log(a,...)
static av_always_inline int isYUV(enum AVPixelFormat pix_fmt)
static SwsVector * sws_getShiftedVec(SwsVector *a, int shift)
Definition: utils.c:2135
uint64_t vRounder
#define ROUNDED_DIV(a, b)
Definition: common.h:56
int32_t * vChrFilterPos
Array of vertical filter starting positions for each dst[i] for chroma planes.
int dstH
Height of destination luma/alpha planes.
int * dither_error[4]
planar YUV 4:2:0, 13.5bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
Definition: pixfmt.h:168
SwsFilter * sws_getDefaultFilter(float lumaGBlur, float chromaGBlur, float lumaSharpen, float chromaSharpen, float chromaHShift, float chromaVShift, int verbose)
Definition: utils.c:1895
planar GBR 4:4:4 27bpp, big-endian
Definition: pixfmt.h:182
#define INLINE_MMX(flags)
Definition: cpu.h:81
planar YUV 4:4:4, 30bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
Definition: pixfmt.h:176
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:188
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
16 bits gray, 16 bits alpha (big-endian)
Definition: pixfmt.h:226
int32_t * hChrFilterPos
Array of horizontal filter starting positions for each dst[i] for chroma planes.
planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
Definition: pixfmt.h:144
#define AVERROR(e)
Definition: error.h:43
int hLumFilterSize
Horizontal filter size for luma/alpha pixels.
SwsFunc ff_getSwsFunc(SwsContext *c)
Return function pointer to fastest main scaler path function depending on architecture and available ...
Definition: swscale.c:592
const char * description
human-readable description
Definition: utils.c:299
int av_pix_fmt_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift)
Utility function to access log2_chroma_w log2_chroma_h from the pixel format AVPixFmtDescriptor.
Definition: pixdesc.c:2360
static const struct endianess table[]
#define PPC_ALTIVEC(flags)
Definition: cpu.h:26
#define SWS_MAX_REDUCE_CUTOFF
Definition: swscale.h:87
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:96
void sws_subVec(SwsVector *a, SwsVector *b)
Definition: utils.c:2185
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)
Print with av_log() a textual representation of the vector a if log_level <= av_log_level.
Definition: utils.c:2231
planar YUV 4:4:4 36bpp, (1 Cr & Cb sample per 1x1 Y & A samples), big-endian
Definition: pixfmt.h:194
planar YUV 4:2:2, 20bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
Definition: pixfmt.h:172
int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
Definition: opt.c:560
planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 plane for the UV components, which are interleaved (firs...
Definition: pixfmt.h:90
#define AV_PIX_FMT_RGB48
Definition: pixfmt.h:337
simple assert() macros that are a bit more flexible than ISO C assert().
planar YUV 4:2:2,28bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
Definition: pixfmt.h:262
GLsizei GLsizei * length
Definition: opengl_enc.c:115
planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
Definition: pixfmt.h:142
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:354
like NV12, with 10bpp per component, data in the high bits, zeros in the low bits, big-endian
Definition: pixfmt.h:299
#define SWS_CS_DEFAULT
Definition: swscale.h:95
#define X86_MMX(flags)
Definition: cpu.h:31
planar YUV 4:4:4 36bpp, (1 Cr & Cb sample per 1x1 Y & A samples), little-endian
Definition: pixfmt.h:195
#define FFMAX(a, b)
Definition: common.h:94
static void error(const char *err)
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:93
void sws_scaleVec(SwsVector *a, double scalar)
Scale all the coefficients of a by the scalar value.
Definition: utils.c:2065
int chrDstW
Width of destination chroma planes.
SwsVector * lumH
Definition: swscale.h:116
#define fail()
Definition: checkasm.h:84
int8_t exp
Definition: eval.c:64
packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as lit...
Definition: pixfmt.h:160
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:94
uint8_t * cascaded1_tmp[4]
void sws_normalizeVec(SwsVector *a, double height)
Scale all the coefficients of a so that their sum equals height.
Definition: utils.c:2073
planar YUV 4:2:0 25bpp, (1 Cr & Cb sample per 2x2 Y & A samples, big-endian)
Definition: pixfmt.h:196
struct SwsContext * sws_getCachedContext(struct SwsContext *context, int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
Check if context can be reused, otherwise reallocate a new one.
Definition: utils.c:2338
#define LICENSE_PREFIX
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:66
#define RETCODE_USE_CASCADE
static enum AVPixelFormat alphaless_fmt(enum AVPixelFormat fmt)
Definition: utils.c:1093
int32_t * hLumFilterPos
Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
void sws_freeFilter(SwsFilter *filter)
Definition: utils.c:2266
int hChrFilterSize
Horizontal filter size for chroma pixels.
int16_t * xyzgamma
SwsVector * sws_allocVec(int length)
Allocate and return an uninitialized vector with length coefficients.
Definition: utils.c:1978
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:349
as above, but U and V bytes are swapped
Definition: pixfmt.h:91
int dstRange
0 = MPG YUV range, 1 = JPG YUV range (destination image).
planar GBR 4:4:4:4 48bpp, big-endian
Definition: pixfmt.h:301
#define RGB2YUV_SHIFT
ptrdiff_t uv_offx2
offset (in bytes) between u and v planes
planar GBR 4:4:4:4 40bpp, big-endian
Definition: pixfmt.h:304
#define APCK_SIZE
#define have_neon(flags)
Definition: cpu.h:27
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:370
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:335
#define FFMIN(a, b)
Definition: common.h:96
#define isBayer(x)
packed RGB 1:2:1, 8bpp, (msb)1R 2G 1B(lsb)
Definition: pixfmt.h:89
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:74
#define SWS_GAUSS
Definition: swscale.h:65
SwsVector * chrH
Definition: swscale.h:118
uint8_t * formatConvBuffer
#define INLINE_AMD3DNOW(flags)
Definition: cpu.h:79
av_cold void ff_sws_rgb2rgb_init(void)
Definition: rgb2rgb.c:133
int32_t
#define RY_IDX
void sws_shiftVec(SwsVector *a, int shift)
Definition: utils.c:2155
void sws_freeContext(SwsContext *c)
Free the swscaler context swsContext.
Definition: utils.c:2278
planar YUV 4:4:4 40bpp, (1 Cr & Cb sample per 1x1 Y & A samples, big-endian)
Definition: pixfmt.h:200
packed YUV 4:2:2, 16bpp, Y0 Cr Y1 Cb
Definition: pixfmt.h:222
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
planar YUV 4:2:2 27bpp, (1 Cr & Cb sample per 2x1 Y & A samples), big-endian
Definition: pixfmt.h:192
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:65
planar YUV 4:2:0,18bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
Definition: pixfmt.h:257
packed XYZ 4:4:4, 36 bpp, (msb) 12X, 12Y, 12Z (lsb), the 2-byte value for each X/Y/Z is stored as big...
Definition: pixfmt.h:212
planar YUV 4:2:0, 15bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
Definition: pixfmt.h:169
av_cold void ff_sws_init_range_convert(SwsContext *c)
Definition: swscale.c:534
SwsContext * sws_alloc_set_opts(int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, const double *param)
Allocate and return an SwsContext.
Definition: utils.c:1833
unsigned swscale_version(void)
Definition: utils.c:75
like NV12, with 10bpp per component, data in the high bits, zeros in the low bits, little-endian
Definition: pixfmt.h:298
double gamma_value
int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation)
Definition: utils.c:852
int srcColorspaceTable[4]
int dstW
Width of destination luma/alpha planes.
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:350
planar YUV 4:2:2, 18bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
Definition: pixfmt.h:178
packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as big...
Definition: pixfmt.h:159
#define DITHER1XBPP
packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), big-endian
Definition: pixfmt.h:118
uint8_t * cascaded_tmp[4]
#define FF_ARRAY_ELEMS(a)
static const ScaleAlgorithm scale_algorithms[]
Definition: utils.c:303
int cascaded1_tmpStride[4]
planar GBR 4:4:4:4 48bpp, little-endian
Definition: pixfmt.h:302
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:362
int32_t * vLumFilterPos
Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
#define AV_PIX_FMT_BGR555
Definition: pixfmt.h:344
int av_opt_get_int(void *obj, const char *name, int search_flags, int64_t *out_val)
Definition: opt.c:877
packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
Definition: pixfmt.h:84
double * coeff
pointer to the list of coefficients
Definition: swscale.h:110
int flag
flag associated to the algorithm
Definition: utils.c:298
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
Definition: pixfmt.h:140
static int cpu_flags
Definition: cpu.c:47
int dstColorspaceTable[4]
static av_cold int initFilter(int16_t **outFilter, int32_t **filterPos, int *outFilterSize, int xInc, int srcW, int dstW, int filterAlign, int one, int flags, int cpu_flags, SwsVector *srcFilter, SwsVector *dstFilter, double param[2], int srcPos, int dstPos)
Definition: utils.c:317
void(* rgb15to16)(const uint8_t *src, uint8_t *dst, int src_size)
Definition: rgb2rgb.c:51
const AVClass * av_class
info on struct for av_log
int16_t xyz2rgb_matrix[3][4]
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:189
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
#define DITHER32_INT
bayer, RGRG..(odd line), GBGB..(even line), 16-bit samples, big-endian */
Definition: pixfmt.h:281
void sws_freeVec(SwsVector *a)
Definition: utils.c:2257
planar GBR 4:4:4 30bpp, big-endian
Definition: pixfmt.h:184
#define AV_CPU_FLAG_MMX
standard MMX
Definition: cpu.h:29
bayer, GRGR..(odd line), BGBG..(even line), 16-bit samples, big-endian */
Definition: pixfmt.h:285
planar YUV 4:2:2 48bpp, (1 Cr & Cb sample per 2x1 Y & A samples, big-endian)
Definition: pixfmt.h:204
int chrDstH
Height of destination chroma planes.
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
Definition: pixfmt.h:63
planar YUV 4:4:0,24bpp, (1 Cr & Cb sample per 1x2 Y samples), little-endian
Definition: pixfmt.h:291
planar GBR 4:4:4 42bpp, little-endian
Definition: pixfmt.h:271
#define SWS_ERROR_DIFFUSION
Definition: swscale.h:85
Replacements for frequently missing libm functions.
#define SWS_AREA
Definition: swscale.h:63
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:351
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:68
planar YUV 4:2:2 48bpp, (1 Cr & Cb sample per 2x1 Y & A samples, little-endian)
Definition: pixfmt.h:205
static SwsVector * sws_diffVec(SwsVector *a, SwsVector *b)
Definition: utils.c:2116
static const char * format
Definition: movenc.c:47
int lumMmxextFilterCodeSize
Runtime-generated MMXEXT horizontal fast bilinear scaler code size for luma/alpha planes...
Describe the class of an AVClass context structure.
Definition: log.h:67
planar YUV 4:4:4 64bpp, (1 Cr & Cb sample per 1x1 Y & A samples, little-endian)
Definition: pixfmt.h:207
#define W(a, i, v)
Definition: jpegls.h:122
int ff_init_hscaler_mmxext(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits)
Y , 16bpp, big-endian.
Definition: pixfmt.h:98
#define isnan(x)
Definition: libm.h:340
int vLumFilterSize
Vertical filter size for luma/alpha pixels.
#define SWS_ACCURATE_RND
Definition: swscale.h:83
byte swapping routines
static void handle_formats(SwsContext *c)
Definition: utils.c:1055
planar YUV 4:2:0,21bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
Definition: pixfmt.h:258
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
Definition: pixfmt.h:254
int chrMmxextFilterCodeSize
Runtime-generated MMXEXT horizontal fast bilinear scaler code size for chroma planes.
planar GBR 4:4:4 42bpp, big-endian
Definition: pixfmt.h:270
planar YUV 4:2:0 22.5bpp, (1 Cr & Cb sample per 2x2 Y & A samples), big-endian
Definition: pixfmt.h:190
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:348
const VDPAUPixFmtMap * map
packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb), little-endian, X=unused/undefined ...
Definition: pixfmt.h:121
int16_t * vChrFilter
Array of vertical filter coefficients for chroma planes.
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:88
#define SWS_POINT
Definition: swscale.h:62
int ff_init_filters(SwsContext *c)
Definition: slice.c:249
bayer, BGBG..(odd line), GRGR..(even line), 16-bit samples, big-endian */
Definition: pixfmt.h:279
int16_t * hLumFilter
Array of horizontal filter coefficients for luma/alpha planes.
SwsContext * sws_alloc_context(void)
Allocate an empty SwsContext.
Definition: utils.c:1065
#define GY_IDX
#define AV_PIX_FMT_BGR565
Definition: pixfmt.h:343
#define SWS_SPLINE
Definition: swscale.h:68
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:368
#define SWS_SINC
Definition: swscale.h:66
planar YUV 4:2:2 30bpp, (1 Cr & Cb sample per 2x1 Y & A samples, little-endian)
Definition: pixfmt.h:199
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:352
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), big-endian , X=unused/undefined
Definition: pixfmt.h:115
#define SWS_BITEXACT
Definition: swscale.h:84
bayer, RGRG..(odd line), GBGB..(even line), 16-bit samples, little-endian */
Definition: pixfmt.h:280
Y , 10bpp, big-endian.
Definition: pixfmt.h:311
packed BGR 4:4:4, 16bpp, (msb)4X 4B 4G 4R(lsb), big-endian, X=unused/undefined
Definition: pixfmt.h:153
planar YUV 4:4:4, 27bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
Definition: pixfmt.h:174
planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
Definition: pixfmt.h:143
static int handle_xyz(enum AVPixelFormat *format)
Definition: utils.c:1046
#define FF_ALLOC_ARRAY_OR_GOTO(ctx, p, nelem, elsize, label)
Definition: internal.h:148
Definition: vc1_parser.c:48
SwsDither dither
uint8_t is_supported_in
Definition: utils.c:93
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb...
Definition: pixfmt.h:72
void sws_addVec(SwsVector *a, SwsVector *b)
Definition: utils.c:2171
#define INLINE_MMXEXT(flags)
Definition: cpu.h:82
int
static double sws_dcVec(SwsVector *a)
Definition: utils.c:2054
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
planar YUV 4:2:2,24bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
Definition: pixfmt.h:261
Y , 8bpp.
Definition: pixfmt.h:70
double param[2]
Input parameters for scaling algorithms that need them.
#define exp2(x)
Definition: libm.h:288
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb...
Definition: pixfmt.h:71
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:229
#define FF_ALLOC_OR_GOTO(ctx, p, size, label)
Definition: internal.h:130
planar GBR 4:4:4 27bpp, little-endian
Definition: pixfmt.h:183
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as big...
Definition: pixfmt.h:110
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
enum AVPixelFormat srcFormat
Source pixel format.
planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
Definition: pixfmt.h:141
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:76
bayer, RGRG..(odd line), GBGB..(even line), 8-bit samples */
Definition: pixfmt.h:275
packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
Definition: pixfmt.h:87
static const uint64_t c2
Definition: murmur3.c:50
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:69
#define XYZ_GAMMA
planar YUV 4:2:0 25bpp, (1 Cr & Cb sample per 2x2 Y & A samples, little-endian)
Definition: pixfmt.h:197
struct SwsContext * cascaded_context[3]
#define SWS_PARAM_DEFAULT
Definition: swscale.h:73
#define SWS_FULL_CHR_H_INP
Definition: swscale.h:81
uint16_t * gamma
SwsFunc swscale
Note that src, dst, srcStride, dstStride will be copied in the sws_scale() wrapper so they can be fre...
#define MAX_FILTER_SIZE
static av_always_inline int diff(const uint32_t a, const uint32_t b)
packed XYZ 4:4:4, 36 bpp, (msb) 12X, 12Y, 12Z (lsb), the 2-byte value for each X/Y/Z is stored as lit...
Definition: pixfmt.h:211
#define av_free(p)
int size_factor
size factor used when initing the filters
Definition: utils.c:300
planar YUV 4:4:4,42bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
Definition: pixfmt.h:267
#define NAN
Definition: math.h:28
int srcFormatBpp
Number of bits per pixel of the source pixel format.
const AVClass ff_sws_context_class
Definition: options.c:87
Y , 16bpp, little-endian.
Definition: pixfmt.h:99
uint8_t is_supported_endianness
Definition: utils.c:95
static AVCodec * c
static const double coeff[2][5]
Definition: vf_owdenoise.c:72
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: pixfmt.h:272
#define lrint
Definition: tablegen.h:53
16 bits gray, 16 bits alpha (little-endian)
Definition: pixfmt.h:227
int sws_isSupportedInput(enum AVPixelFormat pix_fmt)
Return a positive value if pix_fmt is a supported input format, 0 otherwise.
Definition: utils.c:257
SwsVector * sws_getIdentityVec(void)
Allocate and return a vector with just one coefficient, with value 1.0.
Definition: utils.c:2049
planar YUV 4:2:2 30bpp, (1 Cr & Cb sample per 2x1 Y & A samples, big-endian)
Definition: pixfmt.h:198
Y , 12bpp, big-endian.
Definition: pixfmt.h:309
static int height
Definition: utils.c:158
int32_t input_rgb2yuv_table[16+40 *4]
packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb), big-endian , X=unused/undefined
Definition: pixfmt.h:120
number of pixel formats, DO NOT USE THIS if you want to link with shared libav* because the number of...
Definition: pixfmt.h:317
int16_t * vLumFilter
Array of vertical filter coefficients for luma/alpha planes.
#define av_freep(p)
#define GU_IDX
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:100
#define M_PI
Definition: mathematics.h:52
planar GBR 4:4:4 48bpp, little-endian
Definition: pixfmt.h:187
static void makenan_vec(SwsVector *a)
Definition: utils.c:1888
int16_t * hChrFilter
Array of horizontal filter coefficients for chroma planes.
#define av_malloc_array(a, b)
packed BGR 4:4:4, 16bpp, (msb)4X 4B 4G 4R(lsb), little-endian, X=unused/undefined ...
Definition: pixfmt.h:152
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2248
planar YUV 4:2:2 27bpp, (1 Cr & Cb sample per 2x1 Y & A samples), little-endian
Definition: pixfmt.h:193
#define BY_IDX
int chrDstHSubSample
Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination...
int chrSrcW
Width of source chroma planes.
#define isGray(x)
int depth
Number of bits in the component.
Definition: pixdesc.h:58
void ff_get_unscaled_swscale(SwsContext *c)
Set c->swscale to an unscaled converter if one exists for the specific source and destination formats...
planar GBRA 4:4:4:4 64bpp, little-endian
Definition: pixfmt.h:231
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
Definition: pixfmt.h:251
int srcW
Width of source luma/alpha planes.
packed YUV 4:1:1, 12bpp, Cb Y0 Y1 Cr Y2 Y3
Definition: pixfmt.h:83
static void fill_xyztables(struct SwsContext *c)
Definition: utils.c:816
float min
int chrSrcVSubSample
Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image...
int flags
Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
planar YUV 4:2:0,18bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
Definition: pixfmt.h:256
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:363
#define BU_IDX
planar YUV 4:4:4, 30bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
Definition: pixfmt.h:175
for(j=16;j >0;--j)
planar YUV 4:2:2,24bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
Definition: pixfmt.h:260
static av_always_inline int isNBPS(enum AVPixelFormat pix_fmt)
#define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)
Definition: internal.h:139
planar GBR 4:4:4 30bpp, little-endian
Definition: pixfmt.h:185
static SwsVector * sws_getConvVec(SwsVector *a, SwsVector *b)
Definition: utils.c:2079
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:218
#define LIBSWSCALE_VERSION_INT
Definition: version.h:33
packed AYUV 4:4:4,64bpp (1 Cr & Cb sample per 1x1 Y & A samples), little-endian
Definition: pixfmt.h:293
#define V
Definition: avdct.c:30
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
planar YUV 4:2:2, 20bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
Definition: pixfmt.h:171
const char * swscale_license(void)
Return the libswscale license.
Definition: utils.c:86