FFmpeg
swscale.c
Go to the documentation of this file.
1 /*
2  * Copyright (C) 2001-2011 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include <inttypes.h>
22 #include <math.h>
23 #include <stdio.h>
24 #include <string.h>
25 
26 #include "libavutil/avassert.h"
27 #include "libavutil/avutil.h"
28 #include "libavutil/bswap.h"
29 #include "libavutil/cpu.h"
30 #include "libavutil/imgutils.h"
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/mathematics.h"
33 #include "libavutil/mem_internal.h"
34 #include "libavutil/pixdesc.h"
35 #include "config.h"
36 #include "rgb2rgb.h"
37 #include "swscale_internal.h"
38 #include "swscale.h"
39 
40 DECLARE_ALIGNED(8, const uint8_t, ff_dither_8x8_128)[9][8] = {
41  { 36, 68, 60, 92, 34, 66, 58, 90, },
42  { 100, 4, 124, 28, 98, 2, 122, 26, },
43  { 52, 84, 44, 76, 50, 82, 42, 74, },
44  { 116, 20, 108, 12, 114, 18, 106, 10, },
45  { 32, 64, 56, 88, 38, 70, 62, 94, },
46  { 96, 0, 120, 24, 102, 6, 126, 30, },
47  { 48, 80, 40, 72, 54, 86, 46, 78, },
48  { 112, 16, 104, 8, 118, 22, 110, 14, },
49  { 36, 68, 60, 92, 34, 66, 58, 90, },
50 };
51 
52 DECLARE_ALIGNED(8, static const uint8_t, sws_pb_64)[8] = {
53  64, 64, 64, 64, 64, 64, 64, 64
54 };
55 
56 static av_always_inline void fillPlane(uint8_t *plane, int stride, int width,
57  int height, int y, uint8_t val)
58 {
59  int i;
60  uint8_t *ptr = plane + stride * y;
61  for (i = 0; i < height; i++) {
62  memset(ptr, val, width);
63  ptr += stride;
64  }
65 }
66 
67 static void hScale16To19_c(SwsContext *c, int16_t *_dst, int dstW,
68  const uint8_t *_src, const int16_t *filter,
69  const int32_t *filterPos, int filterSize)
70 {
71  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat);
72  int i;
73  int32_t *dst = (int32_t *) _dst;
74  const uint16_t *src = (const uint16_t *) _src;
75  int bits = desc->comp[0].depth - 1;
76  int sh = bits - 4;
77 
78  if ((isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8) && desc->comp[0].depth<16) {
79  sh = 9;
80  } else if (desc->flags & AV_PIX_FMT_FLAG_FLOAT) { /* float input are process like uint 16bpc */
81  sh = 16 - 1 - 4;
82  }
83 
84  for (i = 0; i < dstW; i++) {
85  int j;
86  int srcPos = filterPos[i];
87  int val = 0;
88 
89  for (j = 0; j < filterSize; j++) {
90  val += src[srcPos + j] * filter[filterSize * i + j];
91  }
92  // filter=14 bit, input=16 bit, output=30 bit, >> 11 makes 19 bit
93  dst[i] = FFMIN(val >> sh, (1 << 19) - 1);
94  }
95 }
96 
97 static void hScale16To15_c(SwsContext *c, int16_t *dst, int dstW,
98  const uint8_t *_src, const int16_t *filter,
99  const int32_t *filterPos, int filterSize)
100 {
101  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat);
102  int i;
103  const uint16_t *src = (const uint16_t *) _src;
104  int sh = desc->comp[0].depth - 1;
105 
106  if (sh<15) {
107  sh = isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8 ? 13 : (desc->comp[0].depth - 1);
108  } else if (desc->flags & AV_PIX_FMT_FLAG_FLOAT) { /* float input are process like uint 16bpc */
109  sh = 16 - 1;
110  }
111 
112  for (i = 0; i < dstW; i++) {
113  int j;
114  int srcPos = filterPos[i];
115  int val = 0;
116 
117  for (j = 0; j < filterSize; j++) {
118  val += src[srcPos + j] * filter[filterSize * i + j];
119  }
120  // filter=14 bit, input=16 bit, output=30 bit, >> 15 makes 15 bit
121  dst[i] = FFMIN(val >> sh, (1 << 15) - 1);
122  }
123 }
124 
125 // bilinear / bicubic scaling
126 static void hScale8To15_c(SwsContext *c, int16_t *dst, int dstW,
127  const uint8_t *src, const int16_t *filter,
128  const int32_t *filterPos, int filterSize)
129 {
130  int i;
131  for (i = 0; i < dstW; i++) {
132  int j;
133  int srcPos = filterPos[i];
134  int val = 0;
135  for (j = 0; j < filterSize; j++) {
136  val += ((int)src[srcPos + j]) * filter[filterSize * i + j];
137  }
138  dst[i] = FFMIN(val >> 7, (1 << 15) - 1); // the cubic equation does overflow ...
139  }
140 }
141 
142 static void hScale8To19_c(SwsContext *c, int16_t *_dst, int dstW,
143  const uint8_t *src, const int16_t *filter,
144  const int32_t *filterPos, int filterSize)
145 {
146  int i;
147  int32_t *dst = (int32_t *) _dst;
148  for (i = 0; i < dstW; i++) {
149  int j;
150  int srcPos = filterPos[i];
151  int val = 0;
152  for (j = 0; j < filterSize; j++) {
153  val += ((int)src[srcPos + j]) * filter[filterSize * i + j];
154  }
155  dst[i] = FFMIN(val >> 3, (1 << 19) - 1); // the cubic equation does overflow ...
156  }
157 }
158 
159 // FIXME all pal and rgb srcFormats could do this conversion as well
160 // FIXME all scalers more complex than bilinear could do half of this transform
161 static void chrRangeToJpeg_c(int16_t *dstU, int16_t *dstV, int width)
162 {
163  int i;
164  for (i = 0; i < width; i++) {
165  dstU[i] = (FFMIN(dstU[i], 30775) * 4663 - 9289992) >> 12; // -264
166  dstV[i] = (FFMIN(dstV[i], 30775) * 4663 - 9289992) >> 12; // -264
167  }
168 }
169 
170 static void chrRangeFromJpeg_c(int16_t *dstU, int16_t *dstV, int width)
171 {
172  int i;
173  for (i = 0; i < width; i++) {
174  dstU[i] = (dstU[i] * 1799 + 4081085) >> 11; // 1469
175  dstV[i] = (dstV[i] * 1799 + 4081085) >> 11; // 1469
176  }
177 }
178 
179 static void lumRangeToJpeg_c(int16_t *dst, int width)
180 {
181  int i;
182  for (i = 0; i < width; i++)
183  dst[i] = (FFMIN(dst[i], 30189) * 19077 - 39057361) >> 14;
184 }
185 
186 static void lumRangeFromJpeg_c(int16_t *dst, int width)
187 {
188  int i;
189  for (i = 0; i < width; i++)
190  dst[i] = (dst[i] * 14071 + 33561947) >> 14;
191 }
192 
193 static void chrRangeToJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width)
194 {
195  int i;
196  int32_t *dstU = (int32_t *) _dstU;
197  int32_t *dstV = (int32_t *) _dstV;
198  for (i = 0; i < width; i++) {
199  dstU[i] = (FFMIN(dstU[i], 30775 << 4) * 4663 - (9289992 << 4)) >> 12; // -264
200  dstV[i] = (FFMIN(dstV[i], 30775 << 4) * 4663 - (9289992 << 4)) >> 12; // -264
201  }
202 }
203 
204 static void chrRangeFromJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width)
205 {
206  int i;
207  int32_t *dstU = (int32_t *) _dstU;
208  int32_t *dstV = (int32_t *) _dstV;
209  for (i = 0; i < width; i++) {
210  dstU[i] = (dstU[i] * 1799 + (4081085 << 4)) >> 11; // 1469
211  dstV[i] = (dstV[i] * 1799 + (4081085 << 4)) >> 11; // 1469
212  }
213 }
214 
215 static void lumRangeToJpeg16_c(int16_t *_dst, int width)
216 {
217  int i;
218  int32_t *dst = (int32_t *) _dst;
219  for (i = 0; i < width; i++) {
220  dst[i] = ((int)(FFMIN(dst[i], 30189 << 4) * 4769U - (39057361 << 2))) >> 12;
221  }
222 }
223 
224 static void lumRangeFromJpeg16_c(int16_t *_dst, int width)
225 {
226  int i;
227  int32_t *dst = (int32_t *) _dst;
228  for (i = 0; i < width; i++)
229  dst[i] = (dst[i]*(14071/4) + (33561947<<4)/4)>>12;
230 }
231 
232 
233 #define DEBUG_SWSCALE_BUFFERS 0
234 #define DEBUG_BUFFERS(...) \
235  if (DEBUG_SWSCALE_BUFFERS) \
236  av_log(c, AV_LOG_DEBUG, __VA_ARGS__)
237 
238 static int swscale(SwsContext *c, const uint8_t *src[],
239  int srcStride[], int srcSliceY,
240  int srcSliceH, uint8_t *dst[], int dstStride[])
241 {
242  /* load a few things into local vars to make the code more readable?
243  * and faster */
244  const int dstW = c->dstW;
245  const int dstH = c->dstH;
246 
247  const enum AVPixelFormat dstFormat = c->dstFormat;
248  const int flags = c->flags;
249  int32_t *vLumFilterPos = c->vLumFilterPos;
250  int32_t *vChrFilterPos = c->vChrFilterPos;
251 
252  const int vLumFilterSize = c->vLumFilterSize;
253  const int vChrFilterSize = c->vChrFilterSize;
254 
255  yuv2planar1_fn yuv2plane1 = c->yuv2plane1;
256  yuv2planarX_fn yuv2planeX = c->yuv2planeX;
257  yuv2interleavedX_fn yuv2nv12cX = c->yuv2nv12cX;
258  yuv2packed1_fn yuv2packed1 = c->yuv2packed1;
259  yuv2packed2_fn yuv2packed2 = c->yuv2packed2;
260  yuv2packedX_fn yuv2packedX = c->yuv2packedX;
261  yuv2anyX_fn yuv2anyX = c->yuv2anyX;
262  const int chrSrcSliceY = srcSliceY >> c->chrSrcVSubSample;
263  const int chrSrcSliceH = AV_CEIL_RSHIFT(srcSliceH, c->chrSrcVSubSample);
264  int should_dither = isNBPS(c->srcFormat) ||
265  is16BPS(c->srcFormat);
266  int lastDstY;
267 
268  /* vars which will change and which we need to store back in the context */
269  int dstY = c->dstY;
270  int lastInLumBuf = c->lastInLumBuf;
271  int lastInChrBuf = c->lastInChrBuf;
272 
273  int lumStart = 0;
274  int lumEnd = c->descIndex[0];
275  int chrStart = lumEnd;
276  int chrEnd = c->descIndex[1];
277  int vStart = chrEnd;
278  int vEnd = c->numDesc;
279  SwsSlice *src_slice = &c->slice[lumStart];
280  SwsSlice *hout_slice = &c->slice[c->numSlice-2];
281  SwsSlice *vout_slice = &c->slice[c->numSlice-1];
282  SwsFilterDescriptor *desc = c->desc;
283 
284  int needAlpha = c->needAlpha;
285 
286  int hasLumHoles = 1;
287  int hasChrHoles = 1;
288 
289  if (isPacked(c->srcFormat)) {
290  src[1] =
291  src[2] =
292  src[3] = src[0];
293  srcStride[1] =
294  srcStride[2] =
295  srcStride[3] = srcStride[0];
296  }
297  srcStride[1] *= 1 << c->vChrDrop;
298  srcStride[2] *= 1 << c->vChrDrop;
299 
300  DEBUG_BUFFERS("swscale() %p[%d] %p[%d] %p[%d] %p[%d] -> %p[%d] %p[%d] %p[%d] %p[%d]\n",
301  src[0], srcStride[0], src[1], srcStride[1],
302  src[2], srcStride[2], src[3], srcStride[3],
303  dst[0], dstStride[0], dst[1], dstStride[1],
304  dst[2], dstStride[2], dst[3], dstStride[3]);
305  DEBUG_BUFFERS("srcSliceY: %d srcSliceH: %d dstY: %d dstH: %d\n",
306  srcSliceY, srcSliceH, dstY, dstH);
307  DEBUG_BUFFERS("vLumFilterSize: %d vChrFilterSize: %d\n",
308  vLumFilterSize, vChrFilterSize);
309 
310  if (dstStride[0]&15 || dstStride[1]&15 ||
311  dstStride[2]&15 || dstStride[3]&15) {
312  static int warnedAlready = 0; // FIXME maybe move this into the context
313  if (flags & SWS_PRINT_INFO && !warnedAlready) {
314  av_log(c, AV_LOG_WARNING,
315  "Warning: dstStride is not aligned!\n"
316  " ->cannot do aligned memory accesses anymore\n");
317  warnedAlready = 1;
318  }
319  }
320 
321  if ( (uintptr_t)dst[0]&15 || (uintptr_t)dst[1]&15 || (uintptr_t)dst[2]&15
322  || (uintptr_t)src[0]&15 || (uintptr_t)src[1]&15 || (uintptr_t)src[2]&15
323  || dstStride[0]&15 || dstStride[1]&15 || dstStride[2]&15 || dstStride[3]&15
324  || srcStride[0]&15 || srcStride[1]&15 || srcStride[2]&15 || srcStride[3]&15
325  ) {
326  static int warnedAlready=0;
327  int cpu_flags = av_get_cpu_flags();
328  if (HAVE_MMXEXT && (cpu_flags & AV_CPU_FLAG_SSE2) && !warnedAlready){
329  av_log(c, AV_LOG_WARNING, "Warning: data is not aligned! This can lead to a speed loss\n");
330  warnedAlready=1;
331  }
332  }
333 
334  /* Note the user might start scaling the picture in the middle so this
335  * will not get executed. This is not really intended but works
336  * currently, so people might do it. */
337  if (srcSliceY == 0) {
338  dstY = 0;
339  lastInLumBuf = -1;
340  lastInChrBuf = -1;
341  }
342 
343  if (!should_dither) {
344  c->chrDither8 = c->lumDither8 = sws_pb_64;
345  }
346  lastDstY = dstY;
347 
348  ff_init_vscale_pfn(c, yuv2plane1, yuv2planeX, yuv2nv12cX,
349  yuv2packed1, yuv2packed2, yuv2packedX, yuv2anyX, c->use_mmx_vfilter);
350 
351  ff_init_slice_from_src(src_slice, (uint8_t**)src, srcStride, c->srcW,
352  srcSliceY, srcSliceH, chrSrcSliceY, chrSrcSliceH, 1);
353 
354  ff_init_slice_from_src(vout_slice, (uint8_t**)dst, dstStride, c->dstW,
355  dstY, dstH, dstY >> c->chrDstVSubSample,
356  AV_CEIL_RSHIFT(dstH, c->chrDstVSubSample), 0);
357  if (srcSliceY == 0) {
358  hout_slice->plane[0].sliceY = lastInLumBuf + 1;
359  hout_slice->plane[1].sliceY = lastInChrBuf + 1;
360  hout_slice->plane[2].sliceY = lastInChrBuf + 1;
361  hout_slice->plane[3].sliceY = lastInLumBuf + 1;
362 
363  hout_slice->plane[0].sliceH =
364  hout_slice->plane[1].sliceH =
365  hout_slice->plane[2].sliceH =
366  hout_slice->plane[3].sliceH = 0;
367  hout_slice->width = dstW;
368  }
369 
370  for (; dstY < dstH; dstY++) {
371  const int chrDstY = dstY >> c->chrDstVSubSample;
372  int use_mmx_vfilter= c->use_mmx_vfilter;
373 
374  // First line needed as input
375  const int firstLumSrcY = FFMAX(1 - vLumFilterSize, vLumFilterPos[dstY]);
376  const int firstLumSrcY2 = FFMAX(1 - vLumFilterSize, vLumFilterPos[FFMIN(dstY | ((1 << c->chrDstVSubSample) - 1), dstH - 1)]);
377  // First line needed as input
378  const int firstChrSrcY = FFMAX(1 - vChrFilterSize, vChrFilterPos[chrDstY]);
379 
380  // Last line needed as input
381  int lastLumSrcY = FFMIN(c->srcH, firstLumSrcY + vLumFilterSize) - 1;
382  int lastLumSrcY2 = FFMIN(c->srcH, firstLumSrcY2 + vLumFilterSize) - 1;
383  int lastChrSrcY = FFMIN(c->chrSrcH, firstChrSrcY + vChrFilterSize) - 1;
384  int enough_lines;
385 
386  int i;
387  int posY, cPosY, firstPosY, lastPosY, firstCPosY, lastCPosY;
388 
389  // handle holes (FAST_BILINEAR & weird filters)
390  if (firstLumSrcY > lastInLumBuf) {
391 
392  hasLumHoles = lastInLumBuf != firstLumSrcY - 1;
393  if (hasLumHoles) {
394  hout_slice->plane[0].sliceY = firstLumSrcY;
395  hout_slice->plane[3].sliceY = firstLumSrcY;
396  hout_slice->plane[0].sliceH =
397  hout_slice->plane[3].sliceH = 0;
398  }
399 
400  lastInLumBuf = firstLumSrcY - 1;
401  }
402  if (firstChrSrcY > lastInChrBuf) {
403 
404  hasChrHoles = lastInChrBuf != firstChrSrcY - 1;
405  if (hasChrHoles) {
406  hout_slice->plane[1].sliceY = firstChrSrcY;
407  hout_slice->plane[2].sliceY = firstChrSrcY;
408  hout_slice->plane[1].sliceH =
409  hout_slice->plane[2].sliceH = 0;
410  }
411 
412  lastInChrBuf = firstChrSrcY - 1;
413  }
414 
415  DEBUG_BUFFERS("dstY: %d\n", dstY);
416  DEBUG_BUFFERS("\tfirstLumSrcY: %d lastLumSrcY: %d lastInLumBuf: %d\n",
417  firstLumSrcY, lastLumSrcY, lastInLumBuf);
418  DEBUG_BUFFERS("\tfirstChrSrcY: %d lastChrSrcY: %d lastInChrBuf: %d\n",
419  firstChrSrcY, lastChrSrcY, lastInChrBuf);
420 
421  // Do we have enough lines in this slice to output the dstY line
422  enough_lines = lastLumSrcY2 < srcSliceY + srcSliceH &&
423  lastChrSrcY < AV_CEIL_RSHIFT(srcSliceY + srcSliceH, c->chrSrcVSubSample);
424 
425  if (!enough_lines) {
426  lastLumSrcY = srcSliceY + srcSliceH - 1;
427  lastChrSrcY = chrSrcSliceY + chrSrcSliceH - 1;
428  DEBUG_BUFFERS("buffering slice: lastLumSrcY %d lastChrSrcY %d\n",
429  lastLumSrcY, lastChrSrcY);
430  }
431 
432  av_assert0((lastLumSrcY - firstLumSrcY + 1) <= hout_slice->plane[0].available_lines);
433  av_assert0((lastChrSrcY - firstChrSrcY + 1) <= hout_slice->plane[1].available_lines);
434 
435 
436  posY = hout_slice->plane[0].sliceY + hout_slice->plane[0].sliceH;
437  if (posY <= lastLumSrcY && !hasLumHoles) {
438  firstPosY = FFMAX(firstLumSrcY, posY);
439  lastPosY = FFMIN(firstLumSrcY + hout_slice->plane[0].available_lines - 1, srcSliceY + srcSliceH - 1);
440  } else {
441  firstPosY = posY;
442  lastPosY = lastLumSrcY;
443  }
444 
445  cPosY = hout_slice->plane[1].sliceY + hout_slice->plane[1].sliceH;
446  if (cPosY <= lastChrSrcY && !hasChrHoles) {
447  firstCPosY = FFMAX(firstChrSrcY, cPosY);
448  lastCPosY = FFMIN(firstChrSrcY + hout_slice->plane[1].available_lines - 1, AV_CEIL_RSHIFT(srcSliceY + srcSliceH, c->chrSrcVSubSample) - 1);
449  } else {
450  firstCPosY = cPosY;
451  lastCPosY = lastChrSrcY;
452  }
453 
454  ff_rotate_slice(hout_slice, lastPosY, lastCPosY);
455 
456  if (posY < lastLumSrcY + 1) {
457  for (i = lumStart; i < lumEnd; ++i)
458  desc[i].process(c, &desc[i], firstPosY, lastPosY - firstPosY + 1);
459  }
460 
461  lastInLumBuf = lastLumSrcY;
462 
463  if (cPosY < lastChrSrcY + 1) {
464  for (i = chrStart; i < chrEnd; ++i)
465  desc[i].process(c, &desc[i], firstCPosY, lastCPosY - firstCPosY + 1);
466  }
467 
468  lastInChrBuf = lastChrSrcY;
469 
470  if (!enough_lines)
471  break; // we can't output a dstY line so let's try with the next slice
472 
473 #if HAVE_MMX_INLINE
474  ff_updateMMXDitherTables(c, dstY);
475 #endif
476  if (should_dither) {
477  c->chrDither8 = ff_dither_8x8_128[chrDstY & 7];
478  c->lumDither8 = ff_dither_8x8_128[dstY & 7];
479  }
480  if (dstY >= dstH - 2) {
481  /* hmm looks like we can't use MMX here without overwriting
482  * this array's tail */
483  ff_sws_init_output_funcs(c, &yuv2plane1, &yuv2planeX, &yuv2nv12cX,
484  &yuv2packed1, &yuv2packed2, &yuv2packedX, &yuv2anyX);
485  use_mmx_vfilter= 0;
486  ff_init_vscale_pfn(c, yuv2plane1, yuv2planeX, yuv2nv12cX,
487  yuv2packed1, yuv2packed2, yuv2packedX, yuv2anyX, use_mmx_vfilter);
488  }
489 
490  {
491  for (i = vStart; i < vEnd; ++i)
492  desc[i].process(c, &desc[i], dstY, 1);
493  }
494  }
495  if (isPlanar(dstFormat) && isALPHA(dstFormat) && !needAlpha) {
496  int length = dstW;
497  int height = dstY - lastDstY;
498 
499  if (is16BPS(dstFormat) || isNBPS(dstFormat)) {
500  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(dstFormat);
501  fillPlane16(dst[3], dstStride[3], length, height, lastDstY,
502  1, desc->comp[3].depth,
503  isBE(dstFormat));
504  } else if (is32BPS(dstFormat)) {
505  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(dstFormat);
506  fillPlane32(dst[3], dstStride[3], length, height, lastDstY,
507  1, desc->comp[3].depth,
508  isBE(dstFormat), desc->flags & AV_PIX_FMT_FLAG_FLOAT);
509  } else
510  fillPlane(dst[3], dstStride[3], length, height, lastDstY, 255);
511  }
512 
513 #if HAVE_MMXEXT_INLINE
514  if (av_get_cpu_flags() & AV_CPU_FLAG_MMXEXT)
515  __asm__ volatile ("sfence" ::: "memory");
516 #endif
517  emms_c();
518 
519  /* store changed local vars back in the context */
520  c->dstY = dstY;
521  c->lastInLumBuf = lastInLumBuf;
522  c->lastInChrBuf = lastInChrBuf;
523 
524  return dstY - lastDstY;
525 }
526 
527 av_cold void ff_sws_init_range_convert(SwsContext *c)
528 {
529  c->lumConvertRange = NULL;
530  c->chrConvertRange = NULL;
531  if (c->srcRange != c->dstRange && !isAnyRGB(c->dstFormat)) {
532  if (c->dstBpc <= 14) {
533  if (c->srcRange) {
534  c->lumConvertRange = lumRangeFromJpeg_c;
535  c->chrConvertRange = chrRangeFromJpeg_c;
536  } else {
537  c->lumConvertRange = lumRangeToJpeg_c;
538  c->chrConvertRange = chrRangeToJpeg_c;
539  }
540  } else {
541  if (c->srcRange) {
542  c->lumConvertRange = lumRangeFromJpeg16_c;
543  c->chrConvertRange = chrRangeFromJpeg16_c;
544  } else {
545  c->lumConvertRange = lumRangeToJpeg16_c;
546  c->chrConvertRange = chrRangeToJpeg16_c;
547  }
548  }
549  }
550 }
551 
552 static av_cold void sws_init_swscale(SwsContext *c)
553 {
554  enum AVPixelFormat srcFormat = c->srcFormat;
555 
556  ff_sws_init_output_funcs(c, &c->yuv2plane1, &c->yuv2planeX,
557  &c->yuv2nv12cX, &c->yuv2packed1,
558  &c->yuv2packed2, &c->yuv2packedX, &c->yuv2anyX);
559 
560  ff_sws_init_input_funcs(c);
561 
562  if (c->srcBpc == 8) {
563  if (c->dstBpc <= 14) {
564  c->hyScale = c->hcScale = hScale8To15_c;
565  if (c->flags & SWS_FAST_BILINEAR) {
566  c->hyscale_fast = ff_hyscale_fast_c;
567  c->hcscale_fast = ff_hcscale_fast_c;
568  }
569  } else {
570  c->hyScale = c->hcScale = hScale8To19_c;
571  }
572  } else {
573  c->hyScale = c->hcScale = c->dstBpc > 14 ? hScale16To19_c
574  : hScale16To15_c;
575  }
576 
577  ff_sws_init_range_convert(c);
578 
579  if (!(isGray(srcFormat) || isGray(c->dstFormat) ||
580  srcFormat == AV_PIX_FMT_MONOBLACK || srcFormat == AV_PIX_FMT_MONOWHITE))
581  c->needs_hcscale = 1;
582 }
583 
584 SwsFunc ff_getSwsFunc(SwsContext *c)
585 {
586  sws_init_swscale(c);
587 
588  if (ARCH_PPC)
589  ff_sws_init_swscale_ppc(c);
590  if (ARCH_X86)
591  ff_sws_init_swscale_x86(c);
592  if (ARCH_AARCH64)
593  ff_sws_init_swscale_aarch64(c);
594  if (ARCH_ARM)
595  ff_sws_init_swscale_arm(c);
596 
597  return swscale;
598 }
599 
600 static void reset_ptr(const uint8_t *src[], enum AVPixelFormat format)
601 {
602  if (!isALPHA(format))
603  src[3] = NULL;
604  if (!isPlanar(format)) {
605  src[3] = src[2] = NULL;
606 
607  if (!usePal(format))
608  src[1] = NULL;
609  }
610 }
611 
612 static int check_image_pointers(const uint8_t * const data[4], enum AVPixelFormat pix_fmt,
613  const int linesizes[4])
614 {
615  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
616  int i;
617 
618  av_assert2(desc);
619 
620  for (i = 0; i < 4; i++) {
621  int plane = desc->comp[i].plane;
622  if (!data[plane] || !linesizes[plane])
623  return 0;
624  }
625 
626  return 1;
627 }
628 
629 static void xyz12Torgb48(struct SwsContext *c, uint16_t *dst,
630  const uint16_t *src, int stride, int h)
631 {
632  int xp,yp;
633  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat);
634 
635  for (yp=0; yp<h; yp++) {
636  for (xp=0; xp+2<stride; xp+=3) {
637  int x, y, z, r, g, b;
638 
639  if (desc->flags & AV_PIX_FMT_FLAG_BE) {
640  x = AV_RB16(src + xp + 0);
641  y = AV_RB16(src + xp + 1);
642  z = AV_RB16(src + xp + 2);
643  } else {
644  x = AV_RL16(src + xp + 0);
645  y = AV_RL16(src + xp + 1);
646  z = AV_RL16(src + xp + 2);
647  }
648 
649  x = c->xyzgamma[x>>4];
650  y = c->xyzgamma[y>>4];
651  z = c->xyzgamma[z>>4];
652 
653  // convert from XYZlinear to sRGBlinear
654  r = c->xyz2rgb_matrix[0][0] * x +
655  c->xyz2rgb_matrix[0][1] * y +
656  c->xyz2rgb_matrix[0][2] * z >> 12;
657  g = c->xyz2rgb_matrix[1][0] * x +
658  c->xyz2rgb_matrix[1][1] * y +
659  c->xyz2rgb_matrix[1][2] * z >> 12;
660  b = c->xyz2rgb_matrix[2][0] * x +
661  c->xyz2rgb_matrix[2][1] * y +
662  c->xyz2rgb_matrix[2][2] * z >> 12;
663 
664  // limit values to 12-bit depth
665  r = av_clip_uintp2(r, 12);
666  g = av_clip_uintp2(g, 12);
667  b = av_clip_uintp2(b, 12);
668 
669  // convert from sRGBlinear to RGB and scale from 12bit to 16bit
670  if (desc->flags & AV_PIX_FMT_FLAG_BE) {
671  AV_WB16(dst + xp + 0, c->rgbgamma[r] << 4);
672  AV_WB16(dst + xp + 1, c->rgbgamma[g] << 4);
673  AV_WB16(dst + xp + 2, c->rgbgamma[b] << 4);
674  } else {
675  AV_WL16(dst + xp + 0, c->rgbgamma[r] << 4);
676  AV_WL16(dst + xp + 1, c->rgbgamma[g] << 4);
677  AV_WL16(dst + xp + 2, c->rgbgamma[b] << 4);
678  }
679  }
680  src += stride;
681  dst += stride;
682  }
683 }
684 
685 static void rgb48Toxyz12(struct SwsContext *c, uint16_t *dst,
686  const uint16_t *src, int stride, int h)
687 {
688  int xp,yp;
689  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->dstFormat);
690 
691  for (yp=0; yp<h; yp++) {
692  for (xp=0; xp+2<stride; xp+=3) {
693  int x, y, z, r, g, b;
694 
695  if (desc->flags & AV_PIX_FMT_FLAG_BE) {
696  r = AV_RB16(src + xp + 0);
697  g = AV_RB16(src + xp + 1);
698  b = AV_RB16(src + xp + 2);
699  } else {
700  r = AV_RL16(src + xp + 0);
701  g = AV_RL16(src + xp + 1);
702  b = AV_RL16(src + xp + 2);
703  }
704 
705  r = c->rgbgammainv[r>>4];
706  g = c->rgbgammainv[g>>4];
707  b = c->rgbgammainv[b>>4];
708 
709  // convert from sRGBlinear to XYZlinear
710  x = c->rgb2xyz_matrix[0][0] * r +
711  c->rgb2xyz_matrix[0][1] * g +
712  c->rgb2xyz_matrix[0][2] * b >> 12;
713  y = c->rgb2xyz_matrix[1][0] * r +
714  c->rgb2xyz_matrix[1][1] * g +
715  c->rgb2xyz_matrix[1][2] * b >> 12;
716  z = c->rgb2xyz_matrix[2][0] * r +
717  c->rgb2xyz_matrix[2][1] * g +
718  c->rgb2xyz_matrix[2][2] * b >> 12;
719 
720  // limit values to 12-bit depth
721  x = av_clip_uintp2(x, 12);
722  y = av_clip_uintp2(y, 12);
723  z = av_clip_uintp2(z, 12);
724 
725  // convert from XYZlinear to X'Y'Z' and scale from 12bit to 16bit
726  if (desc->flags & AV_PIX_FMT_FLAG_BE) {
727  AV_WB16(dst + xp + 0, c->xyzgammainv[x] << 4);
728  AV_WB16(dst + xp + 1, c->xyzgammainv[y] << 4);
729  AV_WB16(dst + xp + 2, c->xyzgammainv[z] << 4);
730  } else {
731  AV_WL16(dst + xp + 0, c->xyzgammainv[x] << 4);
732  AV_WL16(dst + xp + 1, c->xyzgammainv[y] << 4);
733  AV_WL16(dst + xp + 2, c->xyzgammainv[z] << 4);
734  }
735  }
736  src += stride;
737  dst += stride;
738  }
739 }
740 
741 /**
742  * swscale wrapper, so we don't need to export the SwsContext.
743  * Assumes planar YUV to be in YUV order instead of YVU.
744  */
745 int attribute_align_arg sws_scale(struct SwsContext *c,
746  const uint8_t * const srcSlice[],
747  const int srcStride[], int srcSliceY,
748  int srcSliceH, uint8_t *const dst[],
749  const int dstStride[])
750 {
751  int i, ret;
752  const uint8_t *src2[4];
753  uint8_t *dst2[4];
754  uint8_t *rgb0_tmp = NULL;
755  int macro_height = isBayer(c->srcFormat) ? 2 : (1 << c->chrSrcVSubSample);
756  // copy strides, so they can safely be modified
757  int srcStride2[4];
758  int dstStride2[4];
759  int srcSliceY_internal = srcSliceY;
760 
761  if (!srcStride || !dstStride || !dst || !srcSlice) {
762  av_log(c, AV_LOG_ERROR, "One of the input parameters to sws_scale() is NULL, please check the calling code\n");
763  return 0;
764  }
765 
766  for (i=0; i<4; i++) {
767  srcStride2[i] = srcStride[i];
768  dstStride2[i] = dstStride[i];
769  }
770 
771  if ((srcSliceY & (macro_height-1)) ||
772  ((srcSliceH& (macro_height-1)) && srcSliceY + srcSliceH != c->srcH) ||
773  srcSliceY + srcSliceH > c->srcH) {
774  av_log(c, AV_LOG_ERROR, "Slice parameters %d, %d are invalid\n", srcSliceY, srcSliceH);
775  return AVERROR(EINVAL);
776  }
777 
778  if (c->gamma_flag && c->cascaded_context[0]) {
779  ret = sws_scale(c->cascaded_context[0],
780  srcSlice, srcStride, srcSliceY, srcSliceH,
781  c->cascaded_tmp, c->cascaded_tmpStride);
782 
783  if (ret < 0)
784  return ret;
785 
786  if (c->cascaded_context[2])
787  ret = sws_scale(c->cascaded_context[1], (const uint8_t * const *)c->cascaded_tmp, c->cascaded_tmpStride, srcSliceY, srcSliceH, c->cascaded1_tmp, c->cascaded1_tmpStride);
788  else
789  ret = sws_scale(c->cascaded_context[1], (const uint8_t * const *)c->cascaded_tmp, c->cascaded_tmpStride, srcSliceY, srcSliceH, dst, dstStride);
790 
791  if (ret < 0)
792  return ret;
793 
794  if (c->cascaded_context[2]) {
795  ret = sws_scale(c->cascaded_context[2],
796  (const uint8_t * const *)c->cascaded1_tmp, c->cascaded1_tmpStride, c->cascaded_context[1]->dstY - ret, c->cascaded_context[1]->dstY,
797  dst, dstStride);
798  }
799  return ret;
800  }
801 
802  if (c->cascaded_context[0] && srcSliceY == 0 && srcSliceH == c->cascaded_context[0]->srcH) {
803  ret = sws_scale(c->cascaded_context[0],
804  srcSlice, srcStride, srcSliceY, srcSliceH,
805  c->cascaded_tmp, c->cascaded_tmpStride);
806  if (ret < 0)
807  return ret;
808  ret = sws_scale(c->cascaded_context[1],
809  (const uint8_t * const * )c->cascaded_tmp, c->cascaded_tmpStride, 0, c->cascaded_context[0]->dstH,
810  dst, dstStride);
811  return ret;
812  }
813 
814  memcpy(src2, srcSlice, sizeof(src2));
815  memcpy(dst2, dst, sizeof(dst2));
816 
817  // do not mess up sliceDir if we have a "trailing" 0-size slice
818  if (srcSliceH == 0)
819  return 0;
820 
821  if (!check_image_pointers(srcSlice, c->srcFormat, srcStride)) {
822  av_log(c, AV_LOG_ERROR, "bad src image pointers\n");
823  return 0;
824  }
825  if (!check_image_pointers((const uint8_t* const*)dst, c->dstFormat, dstStride)) {
826  av_log(c, AV_LOG_ERROR, "bad dst image pointers\n");
827  return 0;
828  }
829 
830  if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {
831  av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");
832  return 0;
833  }
834  if (c->sliceDir == 0) {
835  if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;
836  }
837 
838  if (usePal(c->srcFormat)) {
839  for (i = 0; i < 256; i++) {
840  int r, g, b, y, u, v, a = 0xff;
841  if (c->srcFormat == AV_PIX_FMT_PAL8) {
842  uint32_t p = ((const uint32_t *)(srcSlice[1]))[i];
843  a = (p >> 24) & 0xFF;
844  r = (p >> 16) & 0xFF;
845  g = (p >> 8) & 0xFF;
846  b = p & 0xFF;
847  } else if (c->srcFormat == AV_PIX_FMT_RGB8) {
848  r = ( i >> 5 ) * 36;
849  g = ((i >> 2) & 7) * 36;
850  b = ( i & 3) * 85;
851  } else if (c->srcFormat == AV_PIX_FMT_BGR8) {
852  b = ( i >> 6 ) * 85;
853  g = ((i >> 3) & 7) * 36;
854  r = ( i & 7) * 36;
855  } else if (c->srcFormat == AV_PIX_FMT_RGB4_BYTE) {
856  r = ( i >> 3 ) * 255;
857  g = ((i >> 1) & 3) * 85;
858  b = ( i & 1) * 255;
859  } else if (c->srcFormat == AV_PIX_FMT_GRAY8 || c->srcFormat == AV_PIX_FMT_GRAY8A) {
860  r = g = b = i;
861  } else {
862  av_assert1(c->srcFormat == AV_PIX_FMT_BGR4_BYTE);
863  b = ( i >> 3 ) * 255;
864  g = ((i >> 1) & 3) * 85;
865  r = ( i & 1) * 255;
866  }
867 #define RGB2YUV_SHIFT 15
868 #define BY ( (int) (0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
869 #define BV (-(int) (0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
870 #define BU ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
871 #define GY ( (int) (0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
872 #define GV (-(int) (0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
873 #define GU (-(int) (0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
874 #define RY ( (int) (0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
875 #define RV ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
876 #define RU (-(int) (0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
877 
878  y = av_clip_uint8((RY * r + GY * g + BY * b + ( 33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
879  u = av_clip_uint8((RU * r + GU * g + BU * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
880  v = av_clip_uint8((RV * r + GV * g + BV * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
881  c->pal_yuv[i]= y + (u<<8) + (v<<16) + ((unsigned)a<<24);
882 
883  switch (c->dstFormat) {
884  case AV_PIX_FMT_BGR32:
885 #if !HAVE_BIGENDIAN
886  case AV_PIX_FMT_RGB24:
887 #endif
888  c->pal_rgb[i]= r + (g<<8) + (b<<16) + ((unsigned)a<<24);
889  break;
890  case AV_PIX_FMT_BGR32_1:
891 #if HAVE_BIGENDIAN
892  case AV_PIX_FMT_BGR24:
893 #endif
894  c->pal_rgb[i]= a + (r<<8) + (g<<16) + ((unsigned)b<<24);
895  break;
896  case AV_PIX_FMT_RGB32_1:
897 #if HAVE_BIGENDIAN
898  case AV_PIX_FMT_RGB24:
899 #endif
900  c->pal_rgb[i]= a + (b<<8) + (g<<16) + ((unsigned)r<<24);
901  break;
902  case AV_PIX_FMT_RGB32:
903 #if !HAVE_BIGENDIAN
904  case AV_PIX_FMT_BGR24:
905 #endif
906  default:
907  c->pal_rgb[i]= b + (g<<8) + (r<<16) + ((unsigned)a<<24);
908  }
909  }
910  }
911 
912  if (c->src0Alpha && !c->dst0Alpha && isALPHA(c->dstFormat)) {
913  uint8_t *base;
914  int x,y;
915  rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32);
916  if (!rgb0_tmp)
917  return AVERROR(ENOMEM);
918 
919  base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp;
920  for (y=0; y<srcSliceH; y++){
921  memcpy(base + srcStride[0]*y, src2[0] + srcStride[0]*y, 4*c->srcW);
922  for (x=c->src0Alpha-1; x<4*c->srcW; x+=4) {
923  base[ srcStride[0]*y + x] = 0xFF;
924  }
925  }
926  src2[0] = base;
927  }
928 
929  if (c->srcXYZ && !(c->dstXYZ && c->srcW==c->dstW && c->srcH==c->dstH)) {
930  uint8_t *base;
931  rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32);
932  if (!rgb0_tmp)
933  return AVERROR(ENOMEM);
934 
935  base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp;
936 
937  xyz12Torgb48(c, (uint16_t*)base, (const uint16_t*)src2[0], srcStride[0]/2, srcSliceH);
938  src2[0] = base;
939  }
940 
941  if (!srcSliceY && (c->flags & SWS_BITEXACT) && c->dither == SWS_DITHER_ED && c->dither_error[0])
942  for (i = 0; i < 4; i++)
943  memset(c->dither_error[i], 0, sizeof(c->dither_error[0][0]) * (c->dstW+2));
944 
945  if (c->sliceDir != 1) {
946  // slices go from bottom to top => we flip the image internally
947  for (i=0; i<4; i++) {
948  srcStride2[i] *= -1;
949  dstStride2[i] *= -1;
950  }
951 
952  src2[0] += (srcSliceH - 1) * srcStride[0];
953  if (!usePal(c->srcFormat))
954  src2[1] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[1];
955  src2[2] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[2];
956  src2[3] += (srcSliceH - 1) * srcStride[3];
957  dst2[0] += ( c->dstH - 1) * dstStride[0];
958  dst2[1] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[1];
959  dst2[2] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[2];
960  dst2[3] += ( c->dstH - 1) * dstStride[3];
961 
962  srcSliceY_internal = c->srcH-srcSliceY-srcSliceH;
963  }
964  reset_ptr(src2, c->srcFormat);
965  reset_ptr((void*)dst2, c->dstFormat);
966 
967  /* reset slice direction at end of frame */
968  if (srcSliceY_internal + srcSliceH == c->srcH)
969  c->sliceDir = 0;
970  ret = c->swscale(c, src2, srcStride2, srcSliceY_internal, srcSliceH, dst2, dstStride2);
971 
972  if (c->dstXYZ && !(c->srcXYZ && c->srcW==c->dstW && c->srcH==c->dstH)) {
973  int dstY = c->dstY ? c->dstY : srcSliceY + srcSliceH;
974  uint16_t *dst16 = (uint16_t*)(dst2[0] + (dstY - ret) * dstStride2[0]);
975  av_assert0(dstY >= ret);
976  av_assert0(ret >= 0);
977  av_assert0(c->dstH >= dstY);
978 
979  /* replace on the same data */
980  rgb48Toxyz12(c, dst16, dst16, dstStride2[0]/2, ret);
981  }
982 
983  av_free(rgb0_tmp);
984  return ret;
985 }
isBayer
static av_always_inline int isBayer(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:761
yuv2packed2_fn
void(* yuv2packed2_fn)(struct SwsContext *c, const int16_t *lumSrc[2], const int16_t *chrUSrc[2], const int16_t *chrVSrc[2], const int16_t *alpSrc[2], uint8_t *dest, int dstW, int yalpha, int uvalpha, int y)
Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB output by doing bilinear scalin...
Definition: swscale_internal.h:205
stride
int stride
Definition: mace.c:144
yuv2planar1_fn
void(* yuv2planar1_fn)(const int16_t *src, uint8_t *dest, int dstW, const uint8_t *dither, int offset)
Write one line of horizontally scaled data to planar output without any additional vertical scaling (...
Definition: swscale_internal.h:99
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
process
static void process(NormalizeContext *s, AVFrame *in, AVFrame *out)
Definition: vf_normalize.c:156
yuv2packed1_fn
void(* yuv2packed1_fn)(struct SwsContext *c, const int16_t *lumSrc, const int16_t *chrUSrc[2], const int16_t *chrVSrc[2], const int16_t *alpSrc, uint8_t *dest, int dstW, int uvalpha, int y)
Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB output without any additional v...
Definition: swscale_internal.h:172
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
SwsPlane::sliceH
int sliceH
number of lines
Definition: swscale_internal.h:976
hScale16To19_c
static void hScale16To19_c(SwsContext *c, int16_t *_dst, int dstW, const uint8_t *_src, const int16_t *filter, const int32_t *filterPos, int filterSize)
Definition: swscale.c:67
isPacked
static av_always_inline int isPacked(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:799
r
const char * r
Definition: vf_curves.c:116
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
mem_internal.h
chrRangeFromJpeg16_c
static void chrRangeFromJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width)
Definition: swscale.c:204
AV_PIX_FMT_BGR32
#define AV_PIX_FMT_BGR32
Definition: pixfmt.h:374
u
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:264
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
av_clip_uintp2
#define av_clip_uintp2
Definition: common.h:146
ff_hyscale_fast_c
void ff_hyscale_fast_c(SwsContext *c, int16_t *dst, int dstWidth, const uint8_t *src, int srcW, int xInc)
Definition: hscale_fast_bilinear.c:23
ff_rotate_slice
int ff_rotate_slice(SwsSlice *s, int lum, int chr)
Definition: slice.c:119
AV_PIX_FMT_FLAG_FLOAT
#define AV_PIX_FMT_FLAG_FLOAT
The pixel format contains IEEE-754 floating point values.
Definition: pixdesc.h:190
SwsSlice::plane
SwsPlane plane[MAX_SLICE_PLANES]
color planes
Definition: swscale_internal.h:994
pixdesc.h
hScale8To15_c
static void hScale8To15_c(SwsContext *c, int16_t *dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize)
Definition: swscale.c:126
GV
#define GV
ff_sws_init_input_funcs
void ff_sws_init_input_funcs(SwsContext *c)
b
#define b
Definition: input.c:41
SwsFilterDescriptor
Struct which holds all necessary data for processing a slice.
Definition: swscale_internal.h:1001
yuv2planeX
static void FUNC() yuv2planeX(const int16_t *filter, int filterSize, const int16_t **src, uint8_t *dest, int dstW, const uint8_t *dither, int offset)
Definition: swscale_ppc_template.c:83
data
const char data[16]
Definition: mxf.c:142
AV_PIX_FMT_MONOWHITE
@ AV_PIX_FMT_MONOWHITE
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb.
Definition: pixfmt.h:75
isGray
#define isGray(x)
Definition: swscale.c:40
AV_PIX_FMT_RGB32_1
#define AV_PIX_FMT_RGB32_1
Definition: pixfmt.h:373
base
uint8_t base
Definition: vp3data.h:141
AV_PIX_FMT_BGR24
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
mathematics.h
sws_scale
int attribute_align_arg sws_scale(struct SwsContext *c, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dst[], const int dstStride[])
swscale wrapper, so we don't need to export the SwsContext.
Definition: swscale.c:745
filter
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce then the filter should push the output frames on the output link immediately As an exception to the previous rule if the input frame is enough to produce several output frames then the filter needs output only at least one per link The additional frames can be left buffered in the filter
Definition: filter_design.txt:228
RV
#define RV
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:95
DEBUG_BUFFERS
#define DEBUG_BUFFERS(...)
Definition: swscale.c:234
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:50
xyz12Torgb48
static void xyz12Torgb48(struct SwsContext *c, uint16_t *dst, const uint16_t *src, int stride, int h)
Definition: swscale.c:629
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
SWS_FAST_BILINEAR
#define SWS_FAST_BILINEAR
Definition: swscale.h:58
is16BPS
static av_always_inline int is16BPS(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:646
ff_sws_init_swscale_aarch64
av_cold void ff_sws_init_swscale_aarch64(SwsContext *c)
Definition: swscale.c:32
SWS_BITEXACT
#define SWS_BITEXACT
Definition: swscale.h:84
SwsFunc
int(* SwsFunc)(struct SwsContext *context, const uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dst[], int dstStride[])
Definition: swscale_internal.h:83
yuv2anyX_fn
void(* yuv2anyX_fn)(struct SwsContext *c, const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize, const int16_t *chrFilter, const int16_t **chrUSrc, const int16_t **chrVSrc, int chrFilterSize, const int16_t **alpSrc, uint8_t **dest, int dstW, int y)
Write one line of horizontally scaled Y/U/V/A to YUV/RGB output by doing multi-point vertical scaling...
Definition: swscale_internal.h:271
U
#define U(x)
Definition: vp56_arith.h:37
hScale8To19_c
static void hScale8To19_c(SwsContext *c, int16_t *_dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize)
Definition: swscale.c:142
val
static double val(void *priv, double ch)
Definition: aeval.c:76
isNBPS
static av_always_inline int isNBPS(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:660
RY
#define RY
AV_PIX_FMT_BGR8
@ AV_PIX_FMT_BGR8
packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
Definition: pixfmt.h:83
avassert.h
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
av_cold
#define av_cold
Definition: attributes.h:90
sws_init_swscale
static av_cold void sws_init_swscale(SwsContext *c)
Definition: swscale.c:552
SWS_DITHER_ED
@ SWS_DITHER_ED
Definition: swscale_internal.h:70
width
#define width
intreadwrite.h
GU
#define GU
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
ff_sws_init_swscale_arm
av_cold void ff_sws_init_swscale_arm(SwsContext *c)
Definition: swscale.c:32
format
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample format(the sample packing is implied by the sample format) and sample rate. The lists are not just lists
g
const char * g
Definition: vf_curves.c:117
SwsSlice::width
int width
Slice line width.
Definition: swscale_internal.h:988
bits
uint8_t bits
Definition: vp3data.h:141
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AV_RL16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:94
lumRangeFromJpeg_c
static void lumRangeFromJpeg_c(int16_t *dst, int width)
Definition: swscale.c:186
pix_fmt
static enum AVPixelFormat pix_fmt
Definition: demuxing_decoding.c:40
ff_init_vscale_pfn
void ff_init_vscale_pfn(SwsContext *c, yuv2planar1_fn yuv2plane1, yuv2planarX_fn yuv2planeX, yuv2interleavedX_fn yuv2nv12cX, yuv2packed1_fn yuv2packed1, yuv2packed2_fn yuv2packed2, yuv2packedX_fn yuv2packedX, yuv2anyX_fn yuv2anyX, int use_mmx)
setup vertical scaler functions
Definition: vscale.c:257
AV_PIX_FMT_BGR32_1
#define AV_PIX_FMT_BGR32_1
Definition: pixfmt.h:375
int32_t
int32_t
Definition: audio_convert.c:194
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
ff_sws_init_range_convert
av_cold void ff_sws_init_range_convert(SwsContext *c)
Definition: swscale.c:527
AV_PIX_FMT_GRAY8A
@ AV_PIX_FMT_GRAY8A
alias for AV_PIX_FMT_YA8
Definition: pixfmt.h:146
fillPlane
static av_always_inline void fillPlane(uint8_t *plane, int stride, int width, int height, int y, uint8_t val)
Definition: swscale.c:56
NULL
#define NULL
Definition: coverity.c:32
SwsPlane::available_lines
int available_lines
max number of lines that can be hold by this plane
Definition: swscale_internal.h:974
ff_sws_init_swscale_x86
av_cold void ff_sws_init_swscale_x86(SwsContext *c)
Definition: swscale.c:355
AV_WB16
#define AV_WB16(p, v)
Definition: intreadwrite.h:405
_dstV
RGB2YUV_SHIFT RGB2YUV_SHIFT RGB2YUV_SHIFT RGB2YUV_SHIFT RGB2YUV_SHIFT RGB2YUV_SHIFT RGB2YUV_SHIFT RGB2YUV_SHIFT uint8_t * _dstV
Definition: input.c:398
AV_PIX_FMT_MONOBLACK
@ AV_PIX_FMT_MONOBLACK
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb.
Definition: pixfmt.h:76
src
#define src
Definition: vp8dsp.c:255
AV_PIX_FMT_RGB8
@ AV_PIX_FMT_RGB8
packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
Definition: pixfmt.h:86
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
AV_PIX_FMT_BGR4_BYTE
@ AV_PIX_FMT_BGR4_BYTE
packed RGB 1:2:1, 8bpp, (msb)1B 2G 1R(lsb)
Definition: pixfmt.h:85
chrRangeToJpeg_c
static void chrRangeToJpeg_c(int16_t *dstU, int16_t *dstV, int width)
Definition: swscale.c:161
AV_CPU_FLAG_SSE2
#define AV_CPU_FLAG_SSE2
PIV SSE2 functions.
Definition: cpu.h:36
ff_getSwsFunc
SwsFunc ff_getSwsFunc(SwsContext *c)
Return function pointer to fastest main scaler path function depending on architecture and available ...
Definition: swscale.c:584
isBE
static av_always_inline int isBE(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:667
AV_PIX_FMT_RGB24
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
fillPlane16
static void fillPlane16(uint8_t *plane, int stride, int width, int height, int y, int alpha, int bits, const int big_endian)
Definition: swscale_internal.h:920
usePal
static av_always_inline int usePal(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:830
BV
#define BV
cpu.h
isAnyRGB
static av_always_inline int isAnyRGB(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:775
FFMAX
#define FFMAX(a, b)
Definition: common.h:103
hScale16To15_c
static void hScale16To15_c(SwsContext *c, int16_t *dst, int dstW, const uint8_t *_src, const int16_t *filter, const int32_t *filterPos, int filterSize)
Definition: swscale.c:97
srcSliceH
return srcSliceH
Definition: yuv2rgb_template.c:87
chrRangeToJpeg16_c
static void chrRangeToJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width)
Definition: swscale.c:193
swscale
static int swscale(SwsContext *c, const uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dst[], int dstStride[])
Definition: swscale.c:238
RGB2YUV_SHIFT
#define RGB2YUV_SHIFT
is32BPS
static av_always_inline int is32BPS(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:653
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
height
#define height
AV_PIX_FMT_RGB32
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:372
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:41
FFMIN
#define FFMIN(a, b)
Definition: common.h:105
ff_hcscale_fast_c
void ff_hcscale_fast_c(SwsContext *c, int16_t *dst1, int16_t *dst2, int dstWidth, const uint8_t *src1, const uint8_t *src2, int srcW, int xInc)
Definition: hscale_fast_bilinear.c:38
fillPlane32
static void fillPlane32(uint8_t *plane, int stride, int width, int height, int y, int alpha, int bits, const int big_endian, int is_float)
Definition: swscale_internal.h:941
GY
#define GY
isALPHA
#define isALPHA(x)
Definition: swscale.c:51
DECLARE_ALIGNED
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:117
av_assert2
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
i
int i
Definition: input.c:407
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
check_image_pointers
static int check_image_pointers(const uint8_t *const data[4], enum AVPixelFormat pix_fmt, const int linesizes[4])
Definition: swscale.c:612
av_always_inline
#define av_always_inline
Definition: attributes.h:49
swscale_internal.h
yuv2interleavedX_fn
void(* yuv2interleavedX_fn)(enum AVPixelFormat dstFormat, const uint8_t *chrDither, const int16_t *chrFilter, int chrFilterSize, const int16_t **chrUSrc, const int16_t **chrVSrc, uint8_t *dest, int dstW)
Write one line of horizontally scaled chroma to interleaved output with multi-point vertical scaling ...
Definition: swscale_internal.h:135
AV_PIX_FMT_FLAG_BE
#define AV_PIX_FMT_FLAG_BE
Pixel format is big-endian.
Definition: pixdesc.h:128
uint8_t
uint8_t
Definition: audio_convert.c:194
AV_PIX_FMT_RGB4_BYTE
@ AV_PIX_FMT_RGB4_BYTE
packed RGB 1:2:1, 8bpp, (msb)1R 2G 1B(lsb)
Definition: pixfmt.h:88
SwsSlice
Struct which defines a slice of an image to be scaled or an output for a scaled slice.
Definition: swscale_internal.h:986
ff_init_slice_from_src
int ff_init_slice_from_src(SwsSlice *s, uint8_t *src[4], int stride[4], int srcW, int lumY, int lumH, int chrY, int chrH, int relative)
Definition: slice.c:147
AV_PIX_FMT_PAL8
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
ff_sws_init_output_funcs
av_cold void ff_sws_init_output_funcs(SwsContext *c, yuv2planar1_fn *yuv2plane1, yuv2planarX_fn *yuv2planeX, yuv2interleavedX_fn *yuv2nv12cX, yuv2packed1_fn *yuv2packed1, yuv2packed2_fn *yuv2packed2, yuv2packedX_fn *yuv2packedX, yuv2anyX_fn *yuv2anyX)
Definition: output.c:2543
ret
ret
Definition: filter_design.txt:187
__asm__
__asm__(".macro parse_r var r\n\t" "\\var = -1\n\t" _IFC_REG(0) _IFC_REG(1) _IFC_REG(2) _IFC_REG(3) _IFC_REG(4) _IFC_REG(5) _IFC_REG(6) _IFC_REG(7) _IFC_REG(8) _IFC_REG(9) _IFC_REG(10) _IFC_REG(11) _IFC_REG(12) _IFC_REG(13) _IFC_REG(14) _IFC_REG(15) _IFC_REG(16) _IFC_REG(17) _IFC_REG(18) _IFC_REG(19) _IFC_REG(20) _IFC_REG(21) _IFC_REG(22) _IFC_REG(23) _IFC_REG(24) _IFC_REG(25) _IFC_REG(26) _IFC_REG(27) _IFC_REG(28) _IFC_REG(29) _IFC_REG(30) _IFC_REG(31) ".iflt \\var\n\t" ".error \"Unable to parse register name \\r\"\n\t" ".endif\n\t" ".endm")
bswap.h
sws_pb_64
static const uint8_t sws_pb_64[8]
Definition: swscale.c:52
ff_sws_init_swscale_ppc
av_cold void ff_sws_init_swscale_ppc(SwsContext *c)
Definition: swscale_altivec.c:238
yuv2planarX_fn
void(* yuv2planarX_fn)(const int16_t *filter, int filterSize, const int16_t **src, uint8_t *dest, int dstW, const uint8_t *dither, int offset)
Write one line of horizontally scaled data to planar output with multi-point vertical scaling between...
Definition: swscale_internal.h:115
reset_ptr
static void reset_ptr(const uint8_t *src[], enum AVPixelFormat format)
Definition: swscale.c:600
yuv2packedX_fn
void(* yuv2packedX_fn)(struct SwsContext *c, const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize, const int16_t *chrFilter, const int16_t **chrUSrc, const int16_t **chrVSrc, int chrFilterSize, const int16_t **alpSrc, uint8_t *dest, int dstW, int y)
Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB output by doing multi-point ver...
Definition: swscale_internal.h:237
dstV
uint16_t * dstV
Definition: input.c:403
ff_dither_8x8_128
const uint8_t ff_dither_8x8_128[9][8]
Definition: swscale.c:40
AV_CPU_FLAG_MMXEXT
#define AV_CPU_FLAG_MMXEXT
SSE integer functions or AMD MMX ext.
Definition: cpu.h:32
av_clip_uint8
#define av_clip_uint8
Definition: common.h:128
RU
#define RU
lumRangeToJpeg_c
static void lumRangeToJpeg_c(int16_t *dst, int width)
Definition: swscale.c:179
BU
#define BU
lumRangeFromJpeg16_c
static void lumRangeFromJpeg16_c(int16_t *_dst, int width)
Definition: swscale.c:224
desc
const char * desc
Definition: libsvtav1.c:79
SWS_PRINT_INFO
#define SWS_PRINT_INFO
Definition: swscale.h:75
avutil.h
lumRangeToJpeg16_c
static void lumRangeToJpeg16_c(int16_t *_dst, int width)
Definition: swscale.c:215
SwsPlane::sliceY
int sliceY
index of first line
Definition: swscale_internal.h:975
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
BY
#define BY
chrRangeFromJpeg_c
static void chrRangeFromJpeg_c(int16_t *dstU, int16_t *dstV, int width)
Definition: swscale.c:170
imgutils.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
h
h
Definition: vp9dsp_template.c:2038
ff_updateMMXDitherTables
void ff_updateMMXDitherTables(SwsContext *c, int dstY)
isPlanar
static av_always_inline int isPlanar(enum AVPixelFormat pix_fmt)
Definition: swscale_internal.h:808
int
int
Definition: ffmpeg_filter.c:170
SwsContext
Definition: swscale_internal.h:283
rgb48Toxyz12
static void rgb48Toxyz12(struct SwsContext *c, uint16_t *dst, const uint16_t *src, int stride, int h)
Definition: swscale.c:685
rgb2rgb.h
swscale.h
AV_RB16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:98
Generated on Wed Aug 24 2022 21:34:52 for FFmpeg by   doxygen 1.8.17