2 * Copyright (C) 2001-2011 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
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.
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.
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
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/pixdesc.h"
36 #include "swscale_internal.h"
39 DECLARE_ALIGNED(8, const uint8_t, ff_dither_8x8_128)[9][8] = {
40 { 36, 68, 60, 92, 34, 66, 58, 90, },
41 { 100, 4, 124, 28, 98, 2, 122, 26, },
42 { 52, 84, 44, 76, 50, 82, 42, 74, },
43 { 116, 20, 108, 12, 114, 18, 106, 10, },
44 { 32, 64, 56, 88, 38, 70, 62, 94, },
45 { 96, 0, 120, 24, 102, 6, 126, 30, },
46 { 48, 80, 40, 72, 54, 86, 46, 78, },
47 { 112, 16, 104, 8, 118, 22, 110, 14, },
48 { 36, 68, 60, 92, 34, 66, 58, 90, },
51 DECLARE_ALIGNED(8, static const uint8_t, sws_pb_64)[8] = {
52 64, 64, 64, 64, 64, 64, 64, 64
55 static av_always_inline void fillPlane(uint8_t *plane, int stride, int width,
56 int height, int y, uint8_t val)
59 uint8_t *ptr = plane + stride * y;
60 for (i = 0; i < height; i++) {
61 memset(ptr, val, width);
66 static void hScale16To19_c(SwsContext *c, int16_t *_dst, int dstW,
67 const uint8_t *_src, const int16_t *filter,
68 const int32_t *filterPos, int filterSize)
70 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat);
72 int32_t *dst = (int32_t *) _dst;
73 const uint16_t *src = (const uint16_t *) _src;
74 int bits = desc->comp[0].depth - 1;
77 if ((isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8) && desc->comp[0].depth<16) {
79 } else if (desc->flags & AV_PIX_FMT_FLAG_FLOAT) { /* float input are process like uint 16bpc */
83 for (i = 0; i < dstW; i++) {
85 int srcPos = filterPos[i];
88 for (j = 0; j < filterSize; j++) {
89 val += src[srcPos + j] * filter[filterSize * i + j];
91 // filter=14 bit, input=16 bit, output=30 bit, >> 11 makes 19 bit
92 dst[i] = FFMIN(val >> sh, (1 << 19) - 1);
96 static void hScale16To15_c(SwsContext *c, int16_t *dst, int dstW,
97 const uint8_t *_src, const int16_t *filter,
98 const int32_t *filterPos, int filterSize)
100 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat);
102 const uint16_t *src = (const uint16_t *) _src;
103 int sh = desc->comp[0].depth - 1;
106 sh = isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8 ? 13 : (desc->comp[0].depth - 1);
107 } else if (desc->flags & AV_PIX_FMT_FLAG_FLOAT) { /* float input are process like uint 16bpc */
111 for (i = 0; i < dstW; i++) {
113 int srcPos = filterPos[i];
116 for (j = 0; j < filterSize; j++) {
117 val += src[srcPos + j] * filter[filterSize * i + j];
119 // filter=14 bit, input=16 bit, output=30 bit, >> 15 makes 15 bit
120 dst[i] = FFMIN(val >> sh, (1 << 15) - 1);
124 // bilinear / bicubic scaling
125 static void hScale8To15_c(SwsContext *c, int16_t *dst, int dstW,
126 const uint8_t *src, const int16_t *filter,
127 const int32_t *filterPos, int filterSize)
130 for (i = 0; i < dstW; i++) {
132 int srcPos = filterPos[i];
134 for (j = 0; j < filterSize; j++) {
135 val += ((int)src[srcPos + j]) * filter[filterSize * i + j];
137 dst[i] = FFMIN(val >> 7, (1 << 15) - 1); // the cubic equation does overflow ...
141 static void hScale8To19_c(SwsContext *c, int16_t *_dst, int dstW,
142 const uint8_t *src, const int16_t *filter,
143 const int32_t *filterPos, int filterSize)
146 int32_t *dst = (int32_t *) _dst;
147 for (i = 0; i < dstW; i++) {
149 int srcPos = filterPos[i];
151 for (j = 0; j < filterSize; j++) {
152 val += ((int)src[srcPos + j]) * filter[filterSize * i + j];
154 dst[i] = FFMIN(val >> 3, (1 << 19) - 1); // the cubic equation does overflow ...
158 // FIXME all pal and rgb srcFormats could do this conversion as well
159 // FIXME all scalers more complex than bilinear could do half of this transform
160 static void chrRangeToJpeg_c(int16_t *dstU, int16_t *dstV, int width)
163 for (i = 0; i < width; i++) {
164 dstU[i] = (FFMIN(dstU[i], 30775) * 4663 - 9289992) >> 12; // -264
165 dstV[i] = (FFMIN(dstV[i], 30775) * 4663 - 9289992) >> 12; // -264
169 static void chrRangeFromJpeg_c(int16_t *dstU, int16_t *dstV, int width)
172 for (i = 0; i < width; i++) {
173 dstU[i] = (dstU[i] * 1799 + 4081085) >> 11; // 1469
174 dstV[i] = (dstV[i] * 1799 + 4081085) >> 11; // 1469
178 static void lumRangeToJpeg_c(int16_t *dst, int width)
181 for (i = 0; i < width; i++)
182 dst[i] = (FFMIN(dst[i], 30189) * 19077 - 39057361) >> 14;
185 static void lumRangeFromJpeg_c(int16_t *dst, int width)
188 for (i = 0; i < width; i++)
189 dst[i] = (dst[i] * 14071 + 33561947) >> 14;
192 static void chrRangeToJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width)
195 int32_t *dstU = (int32_t *) _dstU;
196 int32_t *dstV = (int32_t *) _dstV;
197 for (i = 0; i < width; i++) {
198 dstU[i] = (FFMIN(dstU[i], 30775 << 4) * 4663 - (9289992 << 4)) >> 12; // -264
199 dstV[i] = (FFMIN(dstV[i], 30775 << 4) * 4663 - (9289992 << 4)) >> 12; // -264
203 static void chrRangeFromJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width)
206 int32_t *dstU = (int32_t *) _dstU;
207 int32_t *dstV = (int32_t *) _dstV;
208 for (i = 0; i < width; i++) {
209 dstU[i] = (dstU[i] * 1799 + (4081085 << 4)) >> 11; // 1469
210 dstV[i] = (dstV[i] * 1799 + (4081085 << 4)) >> 11; // 1469
214 static void lumRangeToJpeg16_c(int16_t *_dst, int width)
217 int32_t *dst = (int32_t *) _dst;
218 for (i = 0; i < width; i++) {
219 dst[i] = ((int)(FFMIN(dst[i], 30189 << 4) * 4769U - (39057361 << 2))) >> 12;
223 static void lumRangeFromJpeg16_c(int16_t *_dst, int width)
226 int32_t *dst = (int32_t *) _dst;
227 for (i = 0; i < width; i++)
228 dst[i] = (dst[i]*(14071/4) + (33561947<<4)/4)>>12;
232 #define DEBUG_SWSCALE_BUFFERS 0
233 #define DEBUG_BUFFERS(...) \
234 if (DEBUG_SWSCALE_BUFFERS) \
235 av_log(c, AV_LOG_DEBUG, __VA_ARGS__)
237 static int swscale(SwsContext *c, const uint8_t *src[],
238 int srcStride[], int srcSliceY,
239 int srcSliceH, uint8_t *dst[], int dstStride[])
241 /* load a few things into local vars to make the code more readable?
243 const int dstW = c->dstW;
244 const int dstH = c->dstH;
246 const enum AVPixelFormat dstFormat = c->dstFormat;
247 const int flags = c->flags;
248 int32_t *vLumFilterPos = c->vLumFilterPos;
249 int32_t *vChrFilterPos = c->vChrFilterPos;
251 const int vLumFilterSize = c->vLumFilterSize;
252 const int vChrFilterSize = c->vChrFilterSize;
254 yuv2planar1_fn yuv2plane1 = c->yuv2plane1;
255 yuv2planarX_fn yuv2planeX = c->yuv2planeX;
256 yuv2interleavedX_fn yuv2nv12cX = c->yuv2nv12cX;
257 yuv2packed1_fn yuv2packed1 = c->yuv2packed1;
258 yuv2packed2_fn yuv2packed2 = c->yuv2packed2;
259 yuv2packedX_fn yuv2packedX = c->yuv2packedX;
260 yuv2anyX_fn yuv2anyX = c->yuv2anyX;
261 const int chrSrcSliceY = srcSliceY >> c->chrSrcVSubSample;
262 const int chrSrcSliceH = AV_CEIL_RSHIFT(srcSliceH, c->chrSrcVSubSample);
263 int should_dither = isNBPS(c->srcFormat) ||
264 is16BPS(c->srcFormat);
267 /* vars which will change and which we need to store back in the context */
269 int lastInLumBuf = c->lastInLumBuf;
270 int lastInChrBuf = c->lastInChrBuf;
273 int lumEnd = c->descIndex[0];
274 int chrStart = lumEnd;
275 int chrEnd = c->descIndex[1];
277 int vEnd = c->numDesc;
278 SwsSlice *src_slice = &c->slice[lumStart];
279 SwsSlice *hout_slice = &c->slice[c->numSlice-2];
280 SwsSlice *vout_slice = &c->slice[c->numSlice-1];
281 SwsFilterDescriptor *desc = c->desc;
283 int needAlpha = c->needAlpha;
288 if (isPacked(c->srcFormat)) {
294 srcStride[3] = srcStride[0];
296 srcStride[1] *= 1 << c->vChrDrop;
297 srcStride[2] *= 1 << c->vChrDrop;
299 DEBUG_BUFFERS("swscale() %p[%d] %p[%d] %p[%d] %p[%d] -> %p[%d] %p[%d] %p[%d] %p[%d]\n",
300 src[0], srcStride[0], src[1], srcStride[1],
301 src[2], srcStride[2], src[3], srcStride[3],
302 dst[0], dstStride[0], dst[1], dstStride[1],
303 dst[2], dstStride[2], dst[3], dstStride[3]);
304 DEBUG_BUFFERS("srcSliceY: %d srcSliceH: %d dstY: %d dstH: %d\n",
305 srcSliceY, srcSliceH, dstY, dstH);
306 DEBUG_BUFFERS("vLumFilterSize: %d vChrFilterSize: %d\n",
307 vLumFilterSize, vChrFilterSize);
309 if (dstStride[0]&15 || dstStride[1]&15 ||
310 dstStride[2]&15 || dstStride[3]&15) {
311 static int warnedAlready = 0; // FIXME maybe move this into the context
312 if (flags & SWS_PRINT_INFO && !warnedAlready) {
313 av_log(c, AV_LOG_WARNING,
314 "Warning: dstStride is not aligned!\n"
315 " ->cannot do aligned memory accesses anymore\n");
320 if ( (uintptr_t)dst[0]&15 || (uintptr_t)dst[1]&15 || (uintptr_t)dst[2]&15
321 || (uintptr_t)src[0]&15 || (uintptr_t)src[1]&15 || (uintptr_t)src[2]&15
322 || dstStride[0]&15 || dstStride[1]&15 || dstStride[2]&15 || dstStride[3]&15
323 || srcStride[0]&15 || srcStride[1]&15 || srcStride[2]&15 || srcStride[3]&15
325 static int warnedAlready=0;
326 int cpu_flags = av_get_cpu_flags();
327 if (HAVE_MMXEXT && (cpu_flags & AV_CPU_FLAG_SSE2) && !warnedAlready){
328 av_log(c, AV_LOG_WARNING, "Warning: data is not aligned! This can lead to a speed loss\n");
333 /* Note the user might start scaling the picture in the middle so this
334 * will not get executed. This is not really intended but works
335 * currently, so people might do it. */
336 if (srcSliceY == 0) {
342 if (!should_dither) {
343 c->chrDither8 = c->lumDither8 = sws_pb_64;
347 ff_init_vscale_pfn(c, yuv2plane1, yuv2planeX, yuv2nv12cX,
348 yuv2packed1, yuv2packed2, yuv2packedX, yuv2anyX, c->use_mmx_vfilter);
350 ff_init_slice_from_src(src_slice, (uint8_t**)src, srcStride, c->srcW,
351 srcSliceY, srcSliceH, chrSrcSliceY, chrSrcSliceH, 1);
353 ff_init_slice_from_src(vout_slice, (uint8_t**)dst, dstStride, c->dstW,
354 dstY, dstH, dstY >> c->chrDstVSubSample,
355 AV_CEIL_RSHIFT(dstH, c->chrDstVSubSample), 0);
356 if (srcSliceY == 0) {
357 hout_slice->plane[0].sliceY = lastInLumBuf + 1;
358 hout_slice->plane[1].sliceY = lastInChrBuf + 1;
359 hout_slice->plane[2].sliceY = lastInChrBuf + 1;
360 hout_slice->plane[3].sliceY = lastInLumBuf + 1;
362 hout_slice->plane[0].sliceH =
363 hout_slice->plane[1].sliceH =
364 hout_slice->plane[2].sliceH =
365 hout_slice->plane[3].sliceH = 0;
366 hout_slice->width = dstW;
369 for (; dstY < dstH; dstY++) {
370 const int chrDstY = dstY >> c->chrDstVSubSample;
371 int use_mmx_vfilter= c->use_mmx_vfilter;
373 // First line needed as input
374 const int firstLumSrcY = FFMAX(1 - vLumFilterSize, vLumFilterPos[dstY]);
375 const int firstLumSrcY2 = FFMAX(1 - vLumFilterSize, vLumFilterPos[FFMIN(dstY | ((1 << c->chrDstVSubSample) - 1), dstH - 1)]);
376 // First line needed as input
377 const int firstChrSrcY = FFMAX(1 - vChrFilterSize, vChrFilterPos[chrDstY]);
379 // Last line needed as input
380 int lastLumSrcY = FFMIN(c->srcH, firstLumSrcY + vLumFilterSize) - 1;
381 int lastLumSrcY2 = FFMIN(c->srcH, firstLumSrcY2 + vLumFilterSize) - 1;
382 int lastChrSrcY = FFMIN(c->chrSrcH, firstChrSrcY + vChrFilterSize) - 1;
386 int posY, cPosY, firstPosY, lastPosY, firstCPosY, lastCPosY;
388 // handle holes (FAST_BILINEAR & weird filters)
389 if (firstLumSrcY > lastInLumBuf) {
391 hasLumHoles = lastInLumBuf != firstLumSrcY - 1;
393 hout_slice->plane[0].sliceY = firstLumSrcY;
394 hout_slice->plane[3].sliceY = firstLumSrcY;
395 hout_slice->plane[0].sliceH =
396 hout_slice->plane[3].sliceH = 0;
399 lastInLumBuf = firstLumSrcY - 1;
401 if (firstChrSrcY > lastInChrBuf) {
403 hasChrHoles = lastInChrBuf != firstChrSrcY - 1;
405 hout_slice->plane[1].sliceY = firstChrSrcY;
406 hout_slice->plane[2].sliceY = firstChrSrcY;
407 hout_slice->plane[1].sliceH =
408 hout_slice->plane[2].sliceH = 0;
411 lastInChrBuf = firstChrSrcY - 1;
414 DEBUG_BUFFERS("dstY: %d\n", dstY);
415 DEBUG_BUFFERS("\tfirstLumSrcY: %d lastLumSrcY: %d lastInLumBuf: %d\n",
416 firstLumSrcY, lastLumSrcY, lastInLumBuf);
417 DEBUG_BUFFERS("\tfirstChrSrcY: %d lastChrSrcY: %d lastInChrBuf: %d\n",
418 firstChrSrcY, lastChrSrcY, lastInChrBuf);
420 // Do we have enough lines in this slice to output the dstY line
421 enough_lines = lastLumSrcY2 < srcSliceY + srcSliceH &&
422 lastChrSrcY < AV_CEIL_RSHIFT(srcSliceY + srcSliceH, c->chrSrcVSubSample);
425 lastLumSrcY = srcSliceY + srcSliceH - 1;
426 lastChrSrcY = chrSrcSliceY + chrSrcSliceH - 1;
427 DEBUG_BUFFERS("buffering slice: lastLumSrcY %d lastChrSrcY %d\n",
428 lastLumSrcY, lastChrSrcY);
431 av_assert0((lastLumSrcY - firstLumSrcY + 1) <= hout_slice->plane[0].available_lines);
432 av_assert0((lastChrSrcY - firstChrSrcY + 1) <= hout_slice->plane[1].available_lines);
435 posY = hout_slice->plane[0].sliceY + hout_slice->plane[0].sliceH;
436 if (posY <= lastLumSrcY && !hasLumHoles) {
437 firstPosY = FFMAX(firstLumSrcY, posY);
438 lastPosY = FFMIN(firstLumSrcY + hout_slice->plane[0].available_lines - 1, srcSliceY + srcSliceH - 1);
441 lastPosY = lastLumSrcY;
444 cPosY = hout_slice->plane[1].sliceY + hout_slice->plane[1].sliceH;
445 if (cPosY <= lastChrSrcY && !hasChrHoles) {
446 firstCPosY = FFMAX(firstChrSrcY, cPosY);
447 lastCPosY = FFMIN(firstChrSrcY + hout_slice->plane[1].available_lines - 1, AV_CEIL_RSHIFT(srcSliceY + srcSliceH, c->chrSrcVSubSample) - 1);
450 lastCPosY = lastChrSrcY;
453 ff_rotate_slice(hout_slice, lastPosY, lastCPosY);
455 if (posY < lastLumSrcY + 1) {
456 for (i = lumStart; i < lumEnd; ++i)
457 desc[i].process(c, &desc[i], firstPosY, lastPosY - firstPosY + 1);
460 lastInLumBuf = lastLumSrcY;
462 if (cPosY < lastChrSrcY + 1) {
463 for (i = chrStart; i < chrEnd; ++i)
464 desc[i].process(c, &desc[i], firstCPosY, lastCPosY - firstCPosY + 1);
467 lastInChrBuf = lastChrSrcY;
470 break; // we can't output a dstY line so let's try with the next slice
473 ff_updateMMXDitherTables(c, dstY);
476 c->chrDither8 = ff_dither_8x8_128[chrDstY & 7];
477 c->lumDither8 = ff_dither_8x8_128[dstY & 7];
479 if (dstY >= dstH - 2) {
480 /* hmm looks like we can't use MMX here without overwriting
481 * this array's tail */
482 ff_sws_init_output_funcs(c, &yuv2plane1, &yuv2planeX, &yuv2nv12cX,
483 &yuv2packed1, &yuv2packed2, &yuv2packedX, &yuv2anyX);
485 ff_init_vscale_pfn(c, yuv2plane1, yuv2planeX, yuv2nv12cX,
486 yuv2packed1, yuv2packed2, yuv2packedX, yuv2anyX, use_mmx_vfilter);
490 for (i = vStart; i < vEnd; ++i)
491 desc[i].process(c, &desc[i], dstY, 1);
494 if (isPlanar(dstFormat) && isALPHA(dstFormat) && !needAlpha) {
496 int height = dstY - lastDstY;
498 if (is16BPS(dstFormat) || isNBPS(dstFormat)) {
499 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(dstFormat);
500 fillPlane16(dst[3], dstStride[3], length, height, lastDstY,
501 1, desc->comp[3].depth,
503 } else if (is32BPS(dstFormat)) {
504 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(dstFormat);
505 fillPlane32(dst[3], dstStride[3], length, height, lastDstY,
506 1, desc->comp[3].depth,
507 isBE(dstFormat), desc->flags & AV_PIX_FMT_FLAG_FLOAT);
509 fillPlane(dst[3], dstStride[3], length, height, lastDstY, 255);
512 #if HAVE_MMXEXT_INLINE
513 if (av_get_cpu_flags() & AV_CPU_FLAG_MMXEXT)
514 __asm__ volatile ("sfence" ::: "memory");
518 /* store changed local vars back in the context */
520 c->lastInLumBuf = lastInLumBuf;
521 c->lastInChrBuf = lastInChrBuf;
523 return dstY - lastDstY;
526 av_cold void ff_sws_init_range_convert(SwsContext *c)
528 c->lumConvertRange = NULL;
529 c->chrConvertRange = NULL;
530 if (c->srcRange != c->dstRange && !isAnyRGB(c->dstFormat)) {
531 if (c->dstBpc <= 14) {
533 c->lumConvertRange = lumRangeFromJpeg_c;
534 c->chrConvertRange = chrRangeFromJpeg_c;
536 c->lumConvertRange = lumRangeToJpeg_c;
537 c->chrConvertRange = chrRangeToJpeg_c;
541 c->lumConvertRange = lumRangeFromJpeg16_c;
542 c->chrConvertRange = chrRangeFromJpeg16_c;
544 c->lumConvertRange = lumRangeToJpeg16_c;
545 c->chrConvertRange = chrRangeToJpeg16_c;
551 static av_cold void sws_init_swscale(SwsContext *c)
553 enum AVPixelFormat srcFormat = c->srcFormat;
555 ff_sws_init_output_funcs(c, &c->yuv2plane1, &c->yuv2planeX,
556 &c->yuv2nv12cX, &c->yuv2packed1,
557 &c->yuv2packed2, &c->yuv2packedX, &c->yuv2anyX);
559 ff_sws_init_input_funcs(c);
561 if (c->srcBpc == 8) {
562 if (c->dstBpc <= 14) {
563 c->hyScale = c->hcScale = hScale8To15_c;
564 if (c->flags & SWS_FAST_BILINEAR) {
565 c->hyscale_fast = ff_hyscale_fast_c;
566 c->hcscale_fast = ff_hcscale_fast_c;
569 c->hyScale = c->hcScale = hScale8To19_c;
572 c->hyScale = c->hcScale = c->dstBpc > 14 ? hScale16To19_c
576 ff_sws_init_range_convert(c);
578 if (!(isGray(srcFormat) || isGray(c->dstFormat) ||
579 srcFormat == AV_PIX_FMT_MONOBLACK || srcFormat == AV_PIX_FMT_MONOWHITE))
580 c->needs_hcscale = 1;
583 SwsFunc ff_getSwsFunc(SwsContext *c)
588 ff_sws_init_swscale_ppc(c);
590 ff_sws_init_swscale_x86(c);
592 ff_sws_init_swscale_aarch64(c);
594 ff_sws_init_swscale_arm(c);
599 static void reset_ptr(const uint8_t *src[], enum AVPixelFormat format)
601 if (!isALPHA(format))
603 if (!isPlanar(format)) {
604 src[3] = src[2] = NULL;
611 static int check_image_pointers(const uint8_t * const data[4], enum AVPixelFormat pix_fmt,
612 const int linesizes[4])
614 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
619 for (i = 0; i < 4; i++) {
620 int plane = desc->comp[i].plane;
621 if (!data[plane] || !linesizes[plane])
628 static void xyz12Torgb48(struct SwsContext *c, uint16_t *dst,
629 const uint16_t *src, int stride, int h)
632 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat);
634 for (yp=0; yp<h; yp++) {
635 for (xp=0; xp+2<stride; xp+=3) {
636 int x, y, z, r, g, b;
638 if (desc->flags & AV_PIX_FMT_FLAG_BE) {
639 x = AV_RB16(src + xp + 0);
640 y = AV_RB16(src + xp + 1);
641 z = AV_RB16(src + xp + 2);
643 x = AV_RL16(src + xp + 0);
644 y = AV_RL16(src + xp + 1);
645 z = AV_RL16(src + xp + 2);
648 x = c->xyzgamma[x>>4];
649 y = c->xyzgamma[y>>4];
650 z = c->xyzgamma[z>>4];
652 // convert from XYZlinear to sRGBlinear
653 r = c->xyz2rgb_matrix[0][0] * x +
654 c->xyz2rgb_matrix[0][1] * y +
655 c->xyz2rgb_matrix[0][2] * z >> 12;
656 g = c->xyz2rgb_matrix[1][0] * x +
657 c->xyz2rgb_matrix[1][1] * y +
658 c->xyz2rgb_matrix[1][2] * z >> 12;
659 b = c->xyz2rgb_matrix[2][0] * x +
660 c->xyz2rgb_matrix[2][1] * y +
661 c->xyz2rgb_matrix[2][2] * z >> 12;
663 // limit values to 12-bit depth
664 r = av_clip_uintp2(r, 12);
665 g = av_clip_uintp2(g, 12);
666 b = av_clip_uintp2(b, 12);
668 // convert from sRGBlinear to RGB and scale from 12bit to 16bit
669 if (desc->flags & AV_PIX_FMT_FLAG_BE) {
670 AV_WB16(dst + xp + 0, c->rgbgamma[r] << 4);
671 AV_WB16(dst + xp + 1, c->rgbgamma[g] << 4);
672 AV_WB16(dst + xp + 2, c->rgbgamma[b] << 4);
674 AV_WL16(dst + xp + 0, c->rgbgamma[r] << 4);
675 AV_WL16(dst + xp + 1, c->rgbgamma[g] << 4);
676 AV_WL16(dst + xp + 2, c->rgbgamma[b] << 4);
684 static void rgb48Toxyz12(struct SwsContext *c, uint16_t *dst,
685 const uint16_t *src, int stride, int h)
688 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->dstFormat);
690 for (yp=0; yp<h; yp++) {
691 for (xp=0; xp+2<stride; xp+=3) {
692 int x, y, z, r, g, b;
694 if (desc->flags & AV_PIX_FMT_FLAG_BE) {
695 r = AV_RB16(src + xp + 0);
696 g = AV_RB16(src + xp + 1);
697 b = AV_RB16(src + xp + 2);
699 r = AV_RL16(src + xp + 0);
700 g = AV_RL16(src + xp + 1);
701 b = AV_RL16(src + xp + 2);
704 r = c->rgbgammainv[r>>4];
705 g = c->rgbgammainv[g>>4];
706 b = c->rgbgammainv[b>>4];
708 // convert from sRGBlinear to XYZlinear
709 x = c->rgb2xyz_matrix[0][0] * r +
710 c->rgb2xyz_matrix[0][1] * g +
711 c->rgb2xyz_matrix[0][2] * b >> 12;
712 y = c->rgb2xyz_matrix[1][0] * r +
713 c->rgb2xyz_matrix[1][1] * g +
714 c->rgb2xyz_matrix[1][2] * b >> 12;
715 z = c->rgb2xyz_matrix[2][0] * r +
716 c->rgb2xyz_matrix[2][1] * g +
717 c->rgb2xyz_matrix[2][2] * b >> 12;
719 // limit values to 12-bit depth
720 x = av_clip_uintp2(x, 12);
721 y = av_clip_uintp2(y, 12);
722 z = av_clip_uintp2(z, 12);
724 // convert from XYZlinear to X'Y'Z' and scale from 12bit to 16bit
725 if (desc->flags & AV_PIX_FMT_FLAG_BE) {
726 AV_WB16(dst + xp + 0, c->xyzgammainv[x] << 4);
727 AV_WB16(dst + xp + 1, c->xyzgammainv[y] << 4);
728 AV_WB16(dst + xp + 2, c->xyzgammainv[z] << 4);
730 AV_WL16(dst + xp + 0, c->xyzgammainv[x] << 4);
731 AV_WL16(dst + xp + 1, c->xyzgammainv[y] << 4);
732 AV_WL16(dst + xp + 2, c->xyzgammainv[z] << 4);
741 * swscale wrapper, so we don't need to export the SwsContext.
742 * Assumes planar YUV to be in YUV order instead of YVU.
744 int attribute_align_arg sws_scale(struct SwsContext *c,
745 const uint8_t * const srcSlice[],
746 const int srcStride[], int srcSliceY,
747 int srcSliceH, uint8_t *const dst[],
748 const int dstStride[])
751 const uint8_t *src2[4];
753 uint8_t *rgb0_tmp = NULL;
754 int macro_height = isBayer(c->srcFormat) ? 2 : (1 << c->chrSrcVSubSample);
755 // copy strides, so they can safely be modified
758 int srcSliceY_internal = srcSliceY;
760 if (!srcStride || !dstStride || !dst || !srcSlice) {
761 av_log(c, AV_LOG_ERROR, "One of the input parameters to sws_scale() is NULL, please check the calling code\n");
765 for (i=0; i<4; i++) {
766 srcStride2[i] = srcStride[i];
767 dstStride2[i] = dstStride[i];
770 if ((srcSliceY & (macro_height-1)) ||
771 ((srcSliceH& (macro_height-1)) && srcSliceY + srcSliceH != c->srcH) ||
772 srcSliceY + srcSliceH > c->srcH) {
773 av_log(c, AV_LOG_ERROR, "Slice parameters %d, %d are invalid\n", srcSliceY, srcSliceH);
774 return AVERROR(EINVAL);
777 if (c->gamma_flag && c->cascaded_context[0]) {
778 ret = sws_scale(c->cascaded_context[0],
779 srcSlice, srcStride, srcSliceY, srcSliceH,
780 c->cascaded_tmp, c->cascaded_tmpStride);
785 if (c->cascaded_context[2])
786 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 ret = sws_scale(c->cascaded_context[1], (const uint8_t * const *)c->cascaded_tmp, c->cascaded_tmpStride, srcSliceY, srcSliceH, dst, dstStride);
793 if (c->cascaded_context[2]) {
794 ret = sws_scale(c->cascaded_context[2],
795 (const uint8_t * const *)c->cascaded1_tmp, c->cascaded1_tmpStride, c->cascaded_context[1]->dstY - ret, c->cascaded_context[1]->dstY,
801 if (c->cascaded_context[0] && srcSliceY == 0 && srcSliceH == c->cascaded_context[0]->srcH) {
802 ret = sws_scale(c->cascaded_context[0],
803 srcSlice, srcStride, srcSliceY, srcSliceH,
804 c->cascaded_tmp, c->cascaded_tmpStride);
807 ret = sws_scale(c->cascaded_context[1],
808 (const uint8_t * const * )c->cascaded_tmp, c->cascaded_tmpStride, 0, c->cascaded_context[0]->dstH,
813 memcpy(src2, srcSlice, sizeof(src2));
814 memcpy(dst2, dst, sizeof(dst2));
816 // do not mess up sliceDir if we have a "trailing" 0-size slice
820 if (!check_image_pointers(srcSlice, c->srcFormat, srcStride)) {
821 av_log(c, AV_LOG_ERROR, "bad src image pointers\n");
824 if (!check_image_pointers((const uint8_t* const*)dst, c->dstFormat, dstStride)) {
825 av_log(c, AV_LOG_ERROR, "bad dst image pointers\n");
829 if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {
830 av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");
833 if (c->sliceDir == 0) {
834 if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;
837 if (usePal(c->srcFormat)) {
838 for (i = 0; i < 256; i++) {
839 int r, g, b, y, u, v, a = 0xff;
840 if (c->srcFormat == AV_PIX_FMT_PAL8) {
841 uint32_t p = ((const uint32_t *)(srcSlice[1]))[i];
842 a = (p >> 24) & 0xFF;
843 r = (p >> 16) & 0xFF;
846 } else if (c->srcFormat == AV_PIX_FMT_RGB8) {
848 g = ((i >> 2) & 7) * 36;
850 } else if (c->srcFormat == AV_PIX_FMT_BGR8) {
852 g = ((i >> 3) & 7) * 36;
854 } else if (c->srcFormat == AV_PIX_FMT_RGB4_BYTE) {
855 r = ( i >> 3 ) * 255;
856 g = ((i >> 1) & 3) * 85;
858 } else if (c->srcFormat == AV_PIX_FMT_GRAY8 || c->srcFormat == AV_PIX_FMT_GRAY8A) {
861 av_assert1(c->srcFormat == AV_PIX_FMT_BGR4_BYTE);
862 b = ( i >> 3 ) * 255;
863 g = ((i >> 1) & 3) * 85;
866 #define RGB2YUV_SHIFT 15
867 #define BY ( (int) (0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
868 #define BV (-(int) (0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
869 #define BU ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
870 #define GY ( (int) (0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
871 #define GV (-(int) (0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
872 #define GU (-(int) (0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
873 #define RY ( (int) (0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
874 #define RV ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
875 #define RU (-(int) (0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
877 y = av_clip_uint8((RY * r + GY * g + BY * b + ( 33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
878 u = av_clip_uint8((RU * r + GU * g + BU * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
879 v = av_clip_uint8((RV * r + GV * g + BV * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
880 c->pal_yuv[i]= y + (u<<8) + (v<<16) + ((unsigned)a<<24);
882 switch (c->dstFormat) {
883 case AV_PIX_FMT_BGR32:
885 case AV_PIX_FMT_RGB24:
887 c->pal_rgb[i]= r + (g<<8) + (b<<16) + ((unsigned)a<<24);
889 case AV_PIX_FMT_BGR32_1:
891 case AV_PIX_FMT_BGR24:
893 c->pal_rgb[i]= a + (r<<8) + (g<<16) + ((unsigned)b<<24);
895 case AV_PIX_FMT_RGB32_1:
897 case AV_PIX_FMT_RGB24:
899 c->pal_rgb[i]= a + (b<<8) + (g<<16) + ((unsigned)r<<24);
901 case AV_PIX_FMT_RGB32:
903 case AV_PIX_FMT_BGR24:
906 c->pal_rgb[i]= b + (g<<8) + (r<<16) + ((unsigned)a<<24);
911 if (c->src0Alpha && !c->dst0Alpha && isALPHA(c->dstFormat)) {
914 rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32);
916 return AVERROR(ENOMEM);
918 base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp;
919 for (y=0; y<srcSliceH; y++){
920 memcpy(base + srcStride[0]*y, src2[0] + srcStride[0]*y, 4*c->srcW);
921 for (x=c->src0Alpha-1; x<4*c->srcW; x+=4) {
922 base[ srcStride[0]*y + x] = 0xFF;
928 if (c->srcXYZ && !(c->dstXYZ && c->srcW==c->dstW && c->srcH==c->dstH)) {
930 rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32);
932 return AVERROR(ENOMEM);
934 base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp;
936 xyz12Torgb48(c, (uint16_t*)base, (const uint16_t*)src2[0], srcStride[0]/2, srcSliceH);
940 if (!srcSliceY && (c->flags & SWS_BITEXACT) && c->dither == SWS_DITHER_ED && c->dither_error[0])
941 for (i = 0; i < 4; i++)
942 memset(c->dither_error[i], 0, sizeof(c->dither_error[0][0]) * (c->dstW+2));
944 if (c->sliceDir != 1) {
945 // slices go from bottom to top => we flip the image internally
946 for (i=0; i<4; i++) {
951 src2[0] += (srcSliceH - 1) * srcStride[0];
952 if (!usePal(c->srcFormat))
953 src2[1] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[1];
954 src2[2] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[2];
955 src2[3] += (srcSliceH - 1) * srcStride[3];
956 dst2[0] += ( c->dstH - 1) * dstStride[0];
957 dst2[1] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[1];
958 dst2[2] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[2];
959 dst2[3] += ( c->dstH - 1) * dstStride[3];
961 srcSliceY_internal = c->srcH-srcSliceY-srcSliceH;
963 reset_ptr(src2, c->srcFormat);
964 reset_ptr((void*)dst2, c->dstFormat);
966 /* reset slice direction at end of frame */
967 if (srcSliceY_internal + srcSliceH == c->srcH)
969 ret = c->swscale(c, src2, srcStride2, srcSliceY_internal, srcSliceH, dst2, dstStride2);
971 if (c->dstXYZ && !(c->srcXYZ && c->srcW==c->dstW && c->srcH==c->dstH)) {
972 int dstY = c->dstY ? c->dstY : srcSliceY + srcSliceH;
973 uint16_t *dst16 = (uint16_t*)(dst2[0] + (dstY - ret) * dstStride2[0]);
974 av_assert0(dstY >= ret);
975 av_assert0(ret >= 0);
976 av_assert0(c->dstH >= dstY);
978 /* replace on the same data */
979 rgb48Toxyz12(c, dst16, dst16, dstStride2[0]/2, ret);