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
27 #include "libavutil/avassert.h"
28 #include "libavutil/avutil.h"
29 #include "libavutil/bswap.h"
30 #include "libavutil/cpu.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, dither_8x8_128)[8][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, },
50 DECLARE_ALIGNED(8, const uint8_t, ff_sws_pb_64)[8] = {
51 64, 64, 64, 64, 64, 64, 64, 64
54 static av_always_inline void fillPlane(uint8_t *plane, int stride, int width,
55 int height, int y, uint8_t val)
58 uint8_t *ptr = plane + stride * y;
59 for (i = 0; i < height; i++) {
60 memset(ptr, val, width);
65 static void hScale16To19_c(SwsContext *c, int16_t *_dst, int dstW,
66 const uint8_t *_src, const int16_t *filter,
67 const int32_t *filterPos, int filterSize)
69 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat);
71 int32_t *dst = (int32_t *) _dst;
72 const uint16_t *src = (const uint16_t *) _src;
73 int bits = desc->comp[0].depth_minus1;
76 if((isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8) && desc->comp[0].depth_minus1<15)
79 for (i = 0; i < dstW; i++) {
81 int srcPos = filterPos[i];
84 for (j = 0; j < filterSize; j++) {
85 val += src[srcPos + j] * filter[filterSize * i + j];
87 // filter=14 bit, input=16 bit, output=30 bit, >> 11 makes 19 bit
88 dst[i] = FFMIN(val >> sh, (1 << 19) - 1);
92 static void hScale16To15_c(SwsContext *c, int16_t *dst, int dstW,
93 const uint8_t *_src, const int16_t *filter,
94 const int32_t *filterPos, int filterSize)
96 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat);
98 const uint16_t *src = (const uint16_t *) _src;
99 int sh = desc->comp[0].depth_minus1;
102 sh= isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8 ? 13 : desc->comp[0].depth_minus1;
104 for (i = 0; i < dstW; i++) {
106 int srcPos = filterPos[i];
109 for (j = 0; j < filterSize; j++) {
110 val += src[srcPos + j] * filter[filterSize * i + j];
112 // filter=14 bit, input=16 bit, output=30 bit, >> 15 makes 15 bit
113 dst[i] = FFMIN(val >> sh, (1 << 15) - 1);
117 // bilinear / bicubic scaling
118 static void hScale8To15_c(SwsContext *c, int16_t *dst, int dstW,
119 const uint8_t *src, const int16_t *filter,
120 const int32_t *filterPos, int filterSize)
123 for (i = 0; i < dstW; i++) {
125 int srcPos = filterPos[i];
127 for (j = 0; j < filterSize; j++) {
128 val += ((int)src[srcPos + j]) * filter[filterSize * i + j];
130 dst[i] = FFMIN(val >> 7, (1 << 15) - 1); // the cubic equation does overflow ...
134 static void hScale8To19_c(SwsContext *c, int16_t *_dst, int dstW,
135 const uint8_t *src, const int16_t *filter,
136 const int32_t *filterPos, int filterSize)
139 int32_t *dst = (int32_t *) _dst;
140 for (i = 0; i < dstW; i++) {
142 int srcPos = filterPos[i];
144 for (j = 0; j < filterSize; j++) {
145 val += ((int)src[srcPos + j]) * filter[filterSize * i + j];
147 dst[i] = FFMIN(val >> 3, (1 << 19) - 1); // the cubic equation does overflow ...
151 // FIXME all pal and rgb srcFormats could do this convertion as well
152 // FIXME all scalers more complex than bilinear could do half of this transform
153 static void chrRangeToJpeg_c(int16_t *dstU, int16_t *dstV, int width)
156 for (i = 0; i < width; i++) {
157 dstU[i] = (FFMIN(dstU[i], 30775) * 4663 - 9289992) >> 12; // -264
158 dstV[i] = (FFMIN(dstV[i], 30775) * 4663 - 9289992) >> 12; // -264
162 static void chrRangeFromJpeg_c(int16_t *dstU, int16_t *dstV, int width)
165 for (i = 0; i < width; i++) {
166 dstU[i] = (dstU[i] * 1799 + 4081085) >> 11; // 1469
167 dstV[i] = (dstV[i] * 1799 + 4081085) >> 11; // 1469
171 static void lumRangeToJpeg_c(int16_t *dst, int width)
174 for (i = 0; i < width; i++)
175 dst[i] = (FFMIN(dst[i], 30189) * 19077 - 39057361) >> 14;
178 static void lumRangeFromJpeg_c(int16_t *dst, int width)
181 for (i = 0; i < width; i++)
182 dst[i] = (dst[i] * 14071 + 33561947) >> 14;
185 static void chrRangeToJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width)
188 int32_t *dstU = (int32_t *) _dstU;
189 int32_t *dstV = (int32_t *) _dstV;
190 for (i = 0; i < width; i++) {
191 dstU[i] = (FFMIN(dstU[i], 30775 << 4) * 4663 - (9289992 << 4)) >> 12; // -264
192 dstV[i] = (FFMIN(dstV[i], 30775 << 4) * 4663 - (9289992 << 4)) >> 12; // -264
196 static void chrRangeFromJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width)
199 int32_t *dstU = (int32_t *) _dstU;
200 int32_t *dstV = (int32_t *) _dstV;
201 for (i = 0; i < width; i++) {
202 dstU[i] = (dstU[i] * 1799 + (4081085 << 4)) >> 11; // 1469
203 dstV[i] = (dstV[i] * 1799 + (4081085 << 4)) >> 11; // 1469
207 static void lumRangeToJpeg16_c(int16_t *_dst, int width)
210 int32_t *dst = (int32_t *) _dst;
211 for (i = 0; i < width; i++)
212 dst[i] = (FFMIN(dst[i], 30189 << 4) * 4769 - (39057361 << 2)) >> 12;
215 static void lumRangeFromJpeg16_c(int16_t *_dst, int width)
218 int32_t *dst = (int32_t *) _dst;
219 for (i = 0; i < width; i++)
220 dst[i] = (dst[i]*(14071/4) + (33561947<<4)/4)>>12;
223 static void hyscale_fast_c(SwsContext *c, int16_t *dst, int dstWidth,
224 const uint8_t *src, int srcW, int xInc)
227 unsigned int xpos = 0;
228 for (i = 0; i < dstWidth; i++) {
229 register unsigned int xx = xpos >> 16;
230 register unsigned int xalpha = (xpos & 0xFFFF) >> 9;
231 dst[i] = (src[xx] << 7) + (src[xx + 1] - src[xx]) * xalpha;
234 for (i=dstWidth-1; (i*xInc)>>16 >=srcW-1; i--)
235 dst[i] = src[srcW-1]*128;
238 // *** horizontal scale Y line to temp buffer
239 static av_always_inline void hyscale(SwsContext *c, int16_t *dst, int dstWidth,
240 const uint8_t *src_in[4],
242 const int16_t *hLumFilter,
243 const int32_t *hLumFilterPos,
245 uint8_t *formatConvBuffer,
246 uint32_t *pal, int isAlpha)
248 void (*toYV12)(uint8_t *, const uint8_t *, const uint8_t *, const uint8_t *, int, uint32_t *) =
249 isAlpha ? c->alpToYV12 : c->lumToYV12;
250 void (*convertRange)(int16_t *, int) = isAlpha ? NULL : c->lumConvertRange;
251 const uint8_t *src = src_in[isAlpha ? 3 : 0];
254 toYV12(formatConvBuffer, src, src_in[1], src_in[2], srcW, pal);
255 src = formatConvBuffer;
256 } else if (c->readLumPlanar && !isAlpha) {
257 c->readLumPlanar(formatConvBuffer, src_in, srcW);
258 src = formatConvBuffer;
261 if (!c->hyscale_fast) {
262 c->hyScale(c, dst, dstWidth, src, hLumFilter,
263 hLumFilterPos, hLumFilterSize);
264 } else { // fast bilinear upscale / crap downscale
265 c->hyscale_fast(c, dst, dstWidth, src, srcW, xInc);
269 convertRange(dst, dstWidth);
272 static void hcscale_fast_c(SwsContext *c, int16_t *dst1, int16_t *dst2,
273 int dstWidth, const uint8_t *src1,
274 const uint8_t *src2, int srcW, int xInc)
277 unsigned int xpos = 0;
278 for (i = 0; i < dstWidth; i++) {
279 register unsigned int xx = xpos >> 16;
280 register unsigned int xalpha = (xpos & 0xFFFF) >> 9;
281 dst1[i] = (src1[xx] * (xalpha ^ 127) + src1[xx + 1] * xalpha);
282 dst2[i] = (src2[xx] * (xalpha ^ 127) + src2[xx + 1] * xalpha);
285 for (i=dstWidth-1; (i*xInc)>>16 >=srcW-1; i--) {
286 dst1[i] = src1[srcW-1]*128;
287 dst2[i] = src2[srcW-1]*128;
291 static av_always_inline void hcscale(SwsContext *c, int16_t *dst1,
292 int16_t *dst2, int dstWidth,
293 const uint8_t *src_in[4],
295 const int16_t *hChrFilter,
296 const int32_t *hChrFilterPos,
298 uint8_t *formatConvBuffer, uint32_t *pal)
300 const uint8_t *src1 = src_in[1], *src2 = src_in[2];
302 uint8_t *buf2 = formatConvBuffer +
303 FFALIGN(srcW*2+78, 16);
304 c->chrToYV12(formatConvBuffer, buf2, src_in[0], src1, src2, srcW, pal);
305 src1= formatConvBuffer;
307 } else if (c->readChrPlanar) {
308 uint8_t *buf2 = formatConvBuffer +
309 FFALIGN(srcW*2+78, 16);
310 c->readChrPlanar(formatConvBuffer, buf2, src_in, srcW);
311 src1 = formatConvBuffer;
315 if (!c->hcscale_fast) {
316 c->hcScale(c, dst1, dstWidth, src1, hChrFilter, hChrFilterPos, hChrFilterSize);
317 c->hcScale(c, dst2, dstWidth, src2, hChrFilter, hChrFilterPos, hChrFilterSize);
318 } else { // fast bilinear upscale / crap downscale
319 c->hcscale_fast(c, dst1, dst2, dstWidth, src1, src2, srcW, xInc);
322 if (c->chrConvertRange)
323 c->chrConvertRange(dst1, dst2, dstWidth);
326 #define DEBUG_SWSCALE_BUFFERS 0
327 #define DEBUG_BUFFERS(...) \
328 if (DEBUG_SWSCALE_BUFFERS) \
329 av_log(c, AV_LOG_DEBUG, __VA_ARGS__)
331 static int swScale(SwsContext *c, const uint8_t *src[],
332 int srcStride[], int srcSliceY,
333 int srcSliceH, uint8_t *dst[], int dstStride[])
335 /* load a few things into local vars to make the code more readable?
337 const int srcW = c->srcW;
338 const int dstW = c->dstW;
339 const int dstH = c->dstH;
340 const int chrDstW = c->chrDstW;
341 const int chrSrcW = c->chrSrcW;
342 const int lumXInc = c->lumXInc;
343 const int chrXInc = c->chrXInc;
344 const enum AVPixelFormat dstFormat = c->dstFormat;
345 const int flags = c->flags;
346 int32_t *vLumFilterPos = c->vLumFilterPos;
347 int32_t *vChrFilterPos = c->vChrFilterPos;
348 int32_t *hLumFilterPos = c->hLumFilterPos;
349 int32_t *hChrFilterPos = c->hChrFilterPos;
350 int16_t *hLumFilter = c->hLumFilter;
351 int16_t *hChrFilter = c->hChrFilter;
352 int32_t *lumMmxFilter = c->lumMmxFilter;
353 int32_t *chrMmxFilter = c->chrMmxFilter;
354 const int vLumFilterSize = c->vLumFilterSize;
355 const int vChrFilterSize = c->vChrFilterSize;
356 const int hLumFilterSize = c->hLumFilterSize;
357 const int hChrFilterSize = c->hChrFilterSize;
358 int16_t **lumPixBuf = c->lumPixBuf;
359 int16_t **chrUPixBuf = c->chrUPixBuf;
360 int16_t **chrVPixBuf = c->chrVPixBuf;
361 int16_t **alpPixBuf = c->alpPixBuf;
362 const int vLumBufSize = c->vLumBufSize;
363 const int vChrBufSize = c->vChrBufSize;
364 uint8_t *formatConvBuffer = c->formatConvBuffer;
365 uint32_t *pal = c->pal_yuv;
366 yuv2planar1_fn yuv2plane1 = c->yuv2plane1;
367 yuv2planarX_fn yuv2planeX = c->yuv2planeX;
368 yuv2interleavedX_fn yuv2nv12cX = c->yuv2nv12cX;
369 yuv2packed1_fn yuv2packed1 = c->yuv2packed1;
370 yuv2packed2_fn yuv2packed2 = c->yuv2packed2;
371 yuv2packedX_fn yuv2packedX = c->yuv2packedX;
372 const int chrSrcSliceY = srcSliceY >> c->chrSrcVSubSample;
373 const int chrSrcSliceH = -((-srcSliceH) >> c->chrSrcVSubSample);
374 int should_dither = is9_OR_10BPS(c->srcFormat) ||
375 is16BPS(c->srcFormat);
378 /* vars which will change and which we need to store back in the context */
380 int lumBufIndex = c->lumBufIndex;
381 int chrBufIndex = c->chrBufIndex;
382 int lastInLumBuf = c->lastInLumBuf;
383 int lastInChrBuf = c->lastInChrBuf;
385 if (isPacked(c->srcFormat)) {
393 srcStride[3] = srcStride[0];
395 srcStride[1] <<= c->vChrDrop;
396 srcStride[2] <<= c->vChrDrop;
398 DEBUG_BUFFERS("swScale() %p[%d] %p[%d] %p[%d] %p[%d] -> %p[%d] %p[%d] %p[%d] %p[%d]\n",
399 src[0], srcStride[0], src[1], srcStride[1],
400 src[2], srcStride[2], src[3], srcStride[3],
401 dst[0], dstStride[0], dst[1], dstStride[1],
402 dst[2], dstStride[2], dst[3], dstStride[3]);
403 DEBUG_BUFFERS("srcSliceY: %d srcSliceH: %d dstY: %d dstH: %d\n",
404 srcSliceY, srcSliceH, dstY, dstH);
405 DEBUG_BUFFERS("vLumFilterSize: %d vLumBufSize: %d vChrFilterSize: %d vChrBufSize: %d\n",
406 vLumFilterSize, vLumBufSize, vChrFilterSize, vChrBufSize);
408 if (dstStride[0]%16 !=0 || dstStride[1]%16 !=0 ||
409 dstStride[2]%16 !=0 || dstStride[3]%16 != 0) {
410 static int warnedAlready = 0; // FIXME maybe move this into the context
411 if (flags & SWS_PRINT_INFO && !warnedAlready) {
412 av_log(c, AV_LOG_WARNING,
413 "Warning: dstStride is not aligned!\n"
414 " ->cannot do aligned memory accesses anymore\n");
419 if ((int)dst[0]%16 || (int)dst[1]%16 || (int)dst[2]%16 || (int)src[0]%16 || (int)src[1]%16 || (int)src[2]%16
420 || dstStride[0]%16 || dstStride[1]%16 || dstStride[2]%16 || dstStride[3]%16
421 || srcStride[0]%16 || srcStride[1]%16 || srcStride[2]%16 || srcStride[3]%16
423 static int warnedAlready=0;
424 int cpu_flags = av_get_cpu_flags();
425 if (HAVE_MMXEXT && (cpu_flags & AV_CPU_FLAG_SSE2) && !warnedAlready){
426 av_log(c, AV_LOG_WARNING, "Warning: data is not aligned! This can lead to a speedloss\n");
431 /* Note the user might start scaling the picture in the middle so this
432 * will not get executed. This is not really intended but works
433 * currently, so people might do it. */
434 if (srcSliceY == 0) {
442 if (!should_dither) {
443 c->chrDither8 = c->lumDither8 = ff_sws_pb_64;
447 for (; dstY < dstH; dstY++) {
448 const int chrDstY = dstY >> c->chrDstVSubSample;
450 dst[0] + dstStride[0] * dstY,
451 dst[1] + dstStride[1] * chrDstY,
452 dst[2] + dstStride[2] * chrDstY,
453 (CONFIG_SWSCALE_ALPHA && alpPixBuf) ? dst[3] + dstStride[3] * dstY : NULL,
455 int use_mmx_vfilter= c->use_mmx_vfilter;
457 // First line needed as input
458 const int firstLumSrcY = FFMAX(1 - vLumFilterSize, vLumFilterPos[dstY]);
459 const int firstLumSrcY2 = FFMAX(1 - vLumFilterSize, vLumFilterPos[FFMIN(dstY | ((1 << c->chrDstVSubSample) - 1), dstH - 1)]);
460 // First line needed as input
461 const int firstChrSrcY = FFMAX(1 - vChrFilterSize, vChrFilterPos[chrDstY]);
463 // Last line needed as input
464 int lastLumSrcY = FFMIN(c->srcH, firstLumSrcY + vLumFilterSize) - 1;
465 int lastLumSrcY2 = FFMIN(c->srcH, firstLumSrcY2 + vLumFilterSize) - 1;
466 int lastChrSrcY = FFMIN(c->chrSrcH, firstChrSrcY + vChrFilterSize) - 1;
469 // handle holes (FAST_BILINEAR & weird filters)
470 if (firstLumSrcY > lastInLumBuf)
471 lastInLumBuf = firstLumSrcY - 1;
472 if (firstChrSrcY > lastInChrBuf)
473 lastInChrBuf = firstChrSrcY - 1;
474 av_assert0(firstLumSrcY >= lastInLumBuf - vLumBufSize + 1);
475 av_assert0(firstChrSrcY >= lastInChrBuf - vChrBufSize + 1);
477 DEBUG_BUFFERS("dstY: %d\n", dstY);
478 DEBUG_BUFFERS("\tfirstLumSrcY: %d lastLumSrcY: %d lastInLumBuf: %d\n",
479 firstLumSrcY, lastLumSrcY, lastInLumBuf);
480 DEBUG_BUFFERS("\tfirstChrSrcY: %d lastChrSrcY: %d lastInChrBuf: %d\n",
481 firstChrSrcY, lastChrSrcY, lastInChrBuf);
483 // Do we have enough lines in this slice to output the dstY line
484 enough_lines = lastLumSrcY2 < srcSliceY + srcSliceH &&
485 lastChrSrcY < -((-srcSliceY - srcSliceH) >> c->chrSrcVSubSample);
488 lastLumSrcY = srcSliceY + srcSliceH - 1;
489 lastChrSrcY = chrSrcSliceY + chrSrcSliceH - 1;
490 DEBUG_BUFFERS("buffering slice: lastLumSrcY %d lastChrSrcY %d\n",
491 lastLumSrcY, lastChrSrcY);
494 // Do horizontal scaling
495 while (lastInLumBuf < lastLumSrcY) {
496 const uint8_t *src1[4] = {
497 src[0] + (lastInLumBuf + 1 - srcSliceY) * srcStride[0],
498 src[1] + (lastInLumBuf + 1 - srcSliceY) * srcStride[1],
499 src[2] + (lastInLumBuf + 1 - srcSliceY) * srcStride[2],
500 src[3] + (lastInLumBuf + 1 - srcSliceY) * srcStride[3],
503 av_assert0(lumBufIndex < 2 * vLumBufSize);
504 av_assert0(lastInLumBuf + 1 - srcSliceY < srcSliceH);
505 av_assert0(lastInLumBuf + 1 - srcSliceY >= 0);
506 hyscale(c, lumPixBuf[lumBufIndex], dstW, src1, srcW, lumXInc,
507 hLumFilter, hLumFilterPos, hLumFilterSize,
508 formatConvBuffer, pal, 0);
509 if (CONFIG_SWSCALE_ALPHA && alpPixBuf)
510 hyscale(c, alpPixBuf[lumBufIndex], dstW, src1, srcW,
511 lumXInc, hLumFilter, hLumFilterPos, hLumFilterSize,
512 formatConvBuffer, pal, 1);
514 DEBUG_BUFFERS("\t\tlumBufIndex %d: lastInLumBuf: %d\n",
515 lumBufIndex, lastInLumBuf);
517 while (lastInChrBuf < lastChrSrcY) {
518 const uint8_t *src1[4] = {
519 src[0] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[0],
520 src[1] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[1],
521 src[2] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[2],
522 src[3] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[3],
525 av_assert0(chrBufIndex < 2 * vChrBufSize);
526 av_assert0(lastInChrBuf + 1 - chrSrcSliceY < (chrSrcSliceH));
527 av_assert0(lastInChrBuf + 1 - chrSrcSliceY >= 0);
528 // FIXME replace parameters through context struct (some at least)
530 if (c->needs_hcscale)
531 hcscale(c, chrUPixBuf[chrBufIndex], chrVPixBuf[chrBufIndex],
532 chrDstW, src1, chrSrcW, chrXInc,
533 hChrFilter, hChrFilterPos, hChrFilterSize,
534 formatConvBuffer, pal);
536 DEBUG_BUFFERS("\t\tchrBufIndex %d: lastInChrBuf: %d\n",
537 chrBufIndex, lastInChrBuf);
539 // wrap buf index around to stay inside the ring buffer
540 if (lumBufIndex >= vLumBufSize)
541 lumBufIndex -= vLumBufSize;
542 if (chrBufIndex >= vChrBufSize)
543 chrBufIndex -= vChrBufSize;
545 break; // we can't output a dstY line so let's try with the next slice
548 updateMMXDitherTables(c, dstY, lumBufIndex, chrBufIndex,
549 lastInLumBuf, lastInChrBuf);
552 c->chrDither8 = dither_8x8_128[chrDstY & 7];
553 c->lumDither8 = dither_8x8_128[dstY & 7];
555 if (dstY >= dstH - 2) {
556 /* hmm looks like we can't use MMX here without overwriting
557 * this array's tail */
558 ff_sws_init_output_funcs(c, &yuv2plane1, &yuv2planeX, &yuv2nv12cX,
559 &yuv2packed1, &yuv2packed2, &yuv2packedX);
564 const int16_t **lumSrcPtr = (const int16_t **)(void*) lumPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize;
565 const int16_t **chrUSrcPtr = (const int16_t **)(void*) chrUPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize;
566 const int16_t **chrVSrcPtr = (const int16_t **)(void*) chrVPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize;
567 const int16_t **alpSrcPtr = (CONFIG_SWSCALE_ALPHA && alpPixBuf) ?
568 (const int16_t **)(void*) alpPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize : NULL;
569 int16_t *vLumFilter = c->vLumFilter;
570 int16_t *vChrFilter = c->vChrFilter;
572 if (isPlanarYUV(dstFormat) ||
573 (isGray(dstFormat) && !isALPHA(dstFormat))) { // YV12 like
574 const int chrSkipMask = (1 << c->chrDstVSubSample) - 1;
576 vLumFilter += dstY * vLumFilterSize;
577 vChrFilter += chrDstY * vChrFilterSize;
579 // av_assert0(use_mmx_vfilter != (
580 // yuv2planeX == yuv2planeX_10BE_c
581 // || yuv2planeX == yuv2planeX_10LE_c
582 // || yuv2planeX == yuv2planeX_9BE_c
583 // || yuv2planeX == yuv2planeX_9LE_c
584 // || yuv2planeX == yuv2planeX_16BE_c
585 // || yuv2planeX == yuv2planeX_16LE_c
586 // || yuv2planeX == yuv2planeX_8_c) || !ARCH_X86);
589 vLumFilter= c->lumMmxFilter;
590 vChrFilter= c->chrMmxFilter;
593 if (vLumFilterSize == 1) {
594 yuv2plane1(lumSrcPtr[0], dest[0], dstW, c->lumDither8, 0);
596 yuv2planeX(vLumFilter, vLumFilterSize,
598 dstW, c->lumDither8, 0);
601 if (!((dstY & chrSkipMask) || isGray(dstFormat))) {
603 yuv2nv12cX(c, vChrFilter,
604 vChrFilterSize, chrUSrcPtr, chrVSrcPtr,
606 } else if (vChrFilterSize == 1) {
607 yuv2plane1(chrUSrcPtr[0], dest[1], chrDstW, c->chrDither8, 0);
608 yuv2plane1(chrVSrcPtr[0], dest[2], chrDstW, c->chrDither8, 3);
610 yuv2planeX(vChrFilter,
611 vChrFilterSize, chrUSrcPtr, dest[1],
612 chrDstW, c->chrDither8, 0);
613 yuv2planeX(vChrFilter,
614 vChrFilterSize, chrVSrcPtr, dest[2],
615 chrDstW, c->chrDither8, use_mmx_vfilter ? (c->uv_offx2 >> 1) : 3);
619 if (CONFIG_SWSCALE_ALPHA && alpPixBuf) {
621 vLumFilter= c->alpMmxFilter;
623 if (vLumFilterSize == 1) {
624 yuv2plane1(alpSrcPtr[0], dest[3], dstW,
627 yuv2planeX(vLumFilter,
628 vLumFilterSize, alpSrcPtr, dest[3],
629 dstW, c->lumDither8, 0);
633 av_assert1(lumSrcPtr + vLumFilterSize - 1 < lumPixBuf + vLumBufSize * 2);
634 av_assert1(chrUSrcPtr + vChrFilterSize - 1 < chrUPixBuf + vChrBufSize * 2);
635 if (c->yuv2packed1 && vLumFilterSize == 1 &&
636 vChrFilterSize <= 2) { // unscaled RGB
637 int chrAlpha = vChrFilterSize == 1 ? 0 : vChrFilter[2 * dstY + 1];
638 yuv2packed1(c, *lumSrcPtr, chrUSrcPtr, chrVSrcPtr,
639 alpPixBuf ? *alpSrcPtr : NULL,
640 dest[0], dstW, chrAlpha, dstY);
641 } else if (c->yuv2packed2 && vLumFilterSize == 2 &&
642 vChrFilterSize == 2) { // bilinear upscale RGB
643 int lumAlpha = vLumFilter[2 * dstY + 1];
644 int chrAlpha = vChrFilter[2 * dstY + 1];
646 lumMmxFilter[3] = vLumFilter[2 * dstY] * 0x10001;
648 chrMmxFilter[3] = vChrFilter[2 * chrDstY] * 0x10001;
649 yuv2packed2(c, lumSrcPtr, chrUSrcPtr, chrVSrcPtr,
650 alpPixBuf ? alpSrcPtr : NULL,
651 dest[0], dstW, lumAlpha, chrAlpha, dstY);
652 } else { // general RGB
653 yuv2packedX(c, vLumFilter + dstY * vLumFilterSize,
654 lumSrcPtr, vLumFilterSize,
655 vChrFilter + dstY * vChrFilterSize,
656 chrUSrcPtr, chrVSrcPtr, vChrFilterSize,
657 alpSrcPtr, dest[0], dstW, dstY);
662 if (isPlanar(dstFormat) && isALPHA(dstFormat) && !alpPixBuf) {
664 int height = dstY - lastDstY;
666 if (is16BPS(dstFormat) || isNBPS(dstFormat)) {
667 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(dstFormat);
668 fillPlane16(dst[3], dstStride[3], length, height, lastDstY,
669 1, desc->comp[3].depth_minus1,
672 fillPlane(dst[3], dstStride[3], length, height, lastDstY, 255);
675 #if HAVE_MMXEXT_INLINE
676 if (av_get_cpu_flags() & AV_CPU_FLAG_MMXEXT)
677 __asm__ volatile ("sfence" ::: "memory");
681 /* store changed local vars back in the context */
683 c->lumBufIndex = lumBufIndex;
684 c->chrBufIndex = chrBufIndex;
685 c->lastInLumBuf = lastInLumBuf;
686 c->lastInChrBuf = lastInChrBuf;
688 return dstY - lastDstY;
691 static av_cold void sws_init_swScale_c(SwsContext *c)
693 enum AVPixelFormat srcFormat = c->srcFormat;
695 ff_sws_init_output_funcs(c, &c->yuv2plane1, &c->yuv2planeX,
696 &c->yuv2nv12cX, &c->yuv2packed1,
697 &c->yuv2packed2, &c->yuv2packedX);
699 ff_sws_init_input_funcs(c);
702 if (c->srcBpc == 8) {
703 if (c->dstBpc <= 14) {
704 c->hyScale = c->hcScale = hScale8To15_c;
705 if (c->flags & SWS_FAST_BILINEAR) {
706 c->hyscale_fast = hyscale_fast_c;
707 c->hcscale_fast = hcscale_fast_c;
710 c->hyScale = c->hcScale = hScale8To19_c;
713 c->hyScale = c->hcScale = c->dstBpc > 14 ? hScale16To19_c
717 if (c->srcRange != c->dstRange && !isAnyRGB(c->dstFormat)) {
718 if (c->dstBpc <= 14) {
720 c->lumConvertRange = lumRangeFromJpeg_c;
721 c->chrConvertRange = chrRangeFromJpeg_c;
723 c->lumConvertRange = lumRangeToJpeg_c;
724 c->chrConvertRange = chrRangeToJpeg_c;
728 c->lumConvertRange = lumRangeFromJpeg16_c;
729 c->chrConvertRange = chrRangeFromJpeg16_c;
731 c->lumConvertRange = lumRangeToJpeg16_c;
732 c->chrConvertRange = chrRangeToJpeg16_c;
737 if (!(isGray(srcFormat) || isGray(c->dstFormat) ||
738 srcFormat == AV_PIX_FMT_MONOBLACK || srcFormat == AV_PIX_FMT_MONOWHITE))
739 c->needs_hcscale = 1;
742 SwsFunc ff_getSwsFunc(SwsContext *c)
744 sws_init_swScale_c(c);
747 ff_sws_init_swScale_mmx(c);
749 ff_sws_init_swScale_altivec(c);
754 static void reset_ptr(const uint8_t *src[], int format)
756 if (!isALPHA(format))
758 if (!isPlanar(format)) {
759 src[3] = src[2] = NULL;
766 static int check_image_pointers(const uint8_t * const data[4], enum AVPixelFormat pix_fmt,
767 const int linesizes[4])
769 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
772 for (i = 0; i < 4; i++) {
773 int plane = desc->comp[i].plane;
774 if (!data[plane] || !linesizes[plane])
782 * swscale wrapper, so we don't need to export the SwsContext.
783 * Assumes planar YUV to be in YUV order instead of YVU.
785 int attribute_align_arg sws_scale(struct SwsContext *c,
786 const uint8_t * const srcSlice[],
787 const int srcStride[], int srcSliceY,
788 int srcSliceH, uint8_t *const dst[],
789 const int dstStride[])
792 const uint8_t *src2[4];
794 uint8_t *rgb0_tmp = NULL;
796 if (!srcSlice || !dstStride || !dst || !srcSlice) {
797 av_log(c, AV_LOG_ERROR, "One of the input parameters to sws_scale() is NULL, please check the calling code\n");
800 memcpy(src2, srcSlice, sizeof(src2));
801 memcpy(dst2, dst, sizeof(dst2));
803 // do not mess up sliceDir if we have a "trailing" 0-size slice
807 if (!check_image_pointers(srcSlice, c->srcFormat, srcStride)) {
808 av_log(c, AV_LOG_ERROR, "bad src image pointers\n");
811 if (!check_image_pointers((const uint8_t* const*)dst, c->dstFormat, dstStride)) {
812 av_log(c, AV_LOG_ERROR, "bad dst image pointers\n");
816 if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {
817 av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");
820 if (c->sliceDir == 0) {
821 if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;
824 if (usePal(c->srcFormat)) {
825 for (i = 0; i < 256; i++) {
826 int p, r, g, b, y, u, v, a = 0xff;
827 if (c->srcFormat == AV_PIX_FMT_PAL8) {
828 p = ((const uint32_t *)(srcSlice[1]))[i];
829 a = (p >> 24) & 0xFF;
830 r = (p >> 16) & 0xFF;
833 } else if (c->srcFormat == AV_PIX_FMT_RGB8) {
835 g = ((i >> 2) & 7) * 36;
837 } else if (c->srcFormat == AV_PIX_FMT_BGR8) {
839 g = ((i >> 3) & 7) * 36;
841 } else if (c->srcFormat == AV_PIX_FMT_RGB4_BYTE) {
842 r = ( i >> 3 ) * 255;
843 g = ((i >> 1) & 3) * 85;
845 } else if (c->srcFormat == AV_PIX_FMT_GRAY8 || c->srcFormat == AV_PIX_FMT_GRAY8A) {
848 av_assert1(c->srcFormat == AV_PIX_FMT_BGR4_BYTE);
849 b = ( i >> 3 ) * 255;
850 g = ((i >> 1) & 3) * 85;
853 #define RGB2YUV_SHIFT 15
854 #define BY ( (int) (0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
855 #define BV (-(int) (0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
856 #define BU ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
857 #define GY ( (int) (0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
858 #define GV (-(int) (0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
859 #define GU (-(int) (0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
860 #define RY ( (int) (0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
861 #define RV ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
862 #define RU (-(int) (0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
864 y = av_clip_uint8((RY * r + GY * g + BY * b + ( 33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
865 u = av_clip_uint8((RU * r + GU * g + BU * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
866 v = av_clip_uint8((RV * r + GV * g + BV * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
867 c->pal_yuv[i]= y + (u<<8) + (v<<16) + ((unsigned)a<<24);
869 switch (c->dstFormat) {
870 case AV_PIX_FMT_BGR32:
872 case AV_PIX_FMT_RGB24:
874 c->pal_rgb[i]= r + (g<<8) + (b<<16) + ((unsigned)a<<24);
876 case AV_PIX_FMT_BGR32_1:
878 case AV_PIX_FMT_BGR24:
880 c->pal_rgb[i]= a + (r<<8) + (g<<16) + ((unsigned)b<<24);
882 case AV_PIX_FMT_RGB32_1:
884 case AV_PIX_FMT_RGB24:
886 c->pal_rgb[i]= a + (b<<8) + (g<<16) + ((unsigned)r<<24);
888 case AV_PIX_FMT_RGB32:
890 case AV_PIX_FMT_BGR24:
893 c->pal_rgb[i]= b + (g<<8) + (r<<16) + ((unsigned)a<<24);
898 if (c->src0Alpha && !c->dst0Alpha && isALPHA(c->dstFormat)) {
901 rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32);
902 base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp;
903 for (y=0; y<srcSliceH; y++){
904 memcpy(base + srcStride[0]*y, src2[0] + srcStride[0]*y, 4*c->srcW);
905 for (x=c->src0Alpha-1; x<4*c->srcW; x+=4) {
906 base[ srcStride[0]*y + x] = 0xFF;
912 // copy strides, so they can safely be modified
913 if (c->sliceDir == 1) {
914 // slices go from top to bottom
915 int srcStride2[4] = { srcStride[0], srcStride[1], srcStride[2],
917 int dstStride2[4] = { dstStride[0], dstStride[1], dstStride[2],
920 reset_ptr(src2, c->srcFormat);
921 reset_ptr((void*)dst2, c->dstFormat);
923 /* reset slice direction at end of frame */
924 if (srcSliceY + srcSliceH == c->srcH)
927 ret = c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2,
930 // slices go from bottom to top => we flip the image internally
931 int srcStride2[4] = { -srcStride[0], -srcStride[1], -srcStride[2],
933 int dstStride2[4] = { -dstStride[0], -dstStride[1], -dstStride[2],
936 src2[0] += (srcSliceH - 1) * srcStride[0];
937 if (!usePal(c->srcFormat))
938 src2[1] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[1];
939 src2[2] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[2];
940 src2[3] += (srcSliceH - 1) * srcStride[3];
941 dst2[0] += ( c->dstH - 1) * dstStride[0];
942 dst2[1] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[1];
943 dst2[2] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[2];
944 dst2[3] += ( c->dstH - 1) * dstStride[3];
946 reset_ptr(src2, c->srcFormat);
947 reset_ptr((void*)dst2, c->dstFormat);
949 /* reset slice direction at end of frame */
953 ret = c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH,
954 srcSliceH, dst2, dstStride2);