2 * Copyright (C) 2001-2003 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
21 #define _SVID_SOURCE //needed for MAP_ANONYMOUS
22 #define _DARWIN_C_SOURCE // needed for MAP_ANON
31 #if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
32 #define MAP_ANONYMOUS MAP_ANON
36 #define WIN32_LEAN_AND_MEAN
40 #include "swscale_internal.h"
42 #include "libavutil/intreadwrite.h"
43 #include "libavutil/x86_cpu.h"
44 #include "libavutil/cpu.h"
45 #include "libavutil/avutil.h"
46 #include "libavutil/bswap.h"
47 #include "libavutil/opt.h"
48 #include "libavutil/pixdesc.h"
49 #include "libavutil/avassert.h"
51 unsigned swscale_version(void)
53 return LIBSWSCALE_VERSION_INT;
56 const char *swscale_configuration(void)
58 return FFMPEG_CONFIGURATION;
61 const char *swscale_license(void)
63 #define LICENSE_PREFIX "libswscale license: "
64 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
67 #define RET 0xC3 //near return opcode for x86
69 #define isSupportedIn(x) ( \
70 (x)==PIX_FMT_YUV420P \
71 || (x)==PIX_FMT_YUVA420P \
72 || (x)==PIX_FMT_YUYV422 \
73 || (x)==PIX_FMT_UYVY422 \
74 || (x)==PIX_FMT_RGB48BE \
75 || (x)==PIX_FMT_RGB48LE \
76 || (x)==PIX_FMT_RGB32 \
77 || (x)==PIX_FMT_RGB32_1 \
78 || (x)==PIX_FMT_BGR48BE \
79 || (x)==PIX_FMT_BGR48LE \
80 || (x)==PIX_FMT_BGR24 \
81 || (x)==PIX_FMT_BGR565LE \
82 || (x)==PIX_FMT_BGR565BE \
83 || (x)==PIX_FMT_BGR555LE \
84 || (x)==PIX_FMT_BGR555BE \
85 || (x)==PIX_FMT_BGR32 \
86 || (x)==PIX_FMT_BGR32_1 \
87 || (x)==PIX_FMT_RGB24 \
88 || (x)==PIX_FMT_RGB565LE \
89 || (x)==PIX_FMT_RGB565BE \
90 || (x)==PIX_FMT_RGB555LE \
91 || (x)==PIX_FMT_RGB555BE \
92 || (x)==PIX_FMT_GRAY8 \
93 || (x)==PIX_FMT_GRAY8A \
94 || (x)==PIX_FMT_YUV410P \
95 || (x)==PIX_FMT_YUV440P \
96 || (x)==PIX_FMT_NV12 \
97 || (x)==PIX_FMT_NV21 \
98 || (x)==PIX_FMT_GRAY16BE \
99 || (x)==PIX_FMT_GRAY16LE \
100 || (x)==PIX_FMT_YUV444P \
101 || (x)==PIX_FMT_YUV422P \
102 || (x)==PIX_FMT_YUV411P \
103 || (x)==PIX_FMT_YUVJ420P \
104 || (x)==PIX_FMT_YUVJ422P \
105 || (x)==PIX_FMT_YUVJ440P \
106 || (x)==PIX_FMT_YUVJ444P \
107 || (x)==PIX_FMT_PAL8 \
108 || (x)==PIX_FMT_BGR8 \
109 || (x)==PIX_FMT_RGB8 \
110 || (x)==PIX_FMT_BGR4_BYTE \
111 || (x)==PIX_FMT_RGB4_BYTE \
112 || (x)==PIX_FMT_YUV440P \
113 || (x)==PIX_FMT_MONOWHITE \
114 || (x)==PIX_FMT_MONOBLACK \
115 || (x)==PIX_FMT_YUV420P9LE \
116 || (x)==PIX_FMT_YUV444P9LE \
117 || (x)==PIX_FMT_YUV420P10LE \
118 || (x)==PIX_FMT_YUV422P10LE \
119 || (x)==PIX_FMT_YUV444P10LE \
120 || (x)==PIX_FMT_YUV420P16LE \
121 || (x)==PIX_FMT_YUV422P16LE \
122 || (x)==PIX_FMT_YUV444P16LE \
123 || (x)==PIX_FMT_YUV422P10LE \
124 || (x)==PIX_FMT_YUV420P9BE \
125 || (x)==PIX_FMT_YUV444P9BE \
126 || (x)==PIX_FMT_YUV420P10BE \
127 || (x)==PIX_FMT_YUV444P10BE \
128 || (x)==PIX_FMT_YUV422P10BE \
129 || (x)==PIX_FMT_YUV420P16BE \
130 || (x)==PIX_FMT_YUV422P16BE \
131 || (x)==PIX_FMT_YUV444P16BE \
132 || (x)==PIX_FMT_YUV422P10BE \
135 int sws_isSupportedInput(enum PixelFormat pix_fmt)
137 return isSupportedIn(pix_fmt);
140 #define isSupportedOut(x) ( \
141 (x)==PIX_FMT_YUV420P \
142 || (x)==PIX_FMT_YUVA420P \
143 || (x)==PIX_FMT_YUYV422 \
144 || (x)==PIX_FMT_UYVY422 \
145 || (x)==PIX_FMT_YUV444P \
146 || (x)==PIX_FMT_YUV422P \
147 || (x)==PIX_FMT_YUV411P \
148 || (x)==PIX_FMT_YUVJ420P \
149 || (x)==PIX_FMT_YUVJ422P \
150 || (x)==PIX_FMT_YUVJ440P \
151 || (x)==PIX_FMT_YUVJ444P \
154 || (x)==PIX_FMT_RGB565LE \
155 || (x)==PIX_FMT_RGB565BE \
156 || (x)==PIX_FMT_RGB555LE \
157 || (x)==PIX_FMT_RGB555BE \
158 || (x)==PIX_FMT_RGB444LE \
159 || (x)==PIX_FMT_RGB444BE \
160 || (x)==PIX_FMT_BGR565LE \
161 || (x)==PIX_FMT_BGR565BE \
162 || (x)==PIX_FMT_BGR555LE \
163 || (x)==PIX_FMT_BGR555BE \
164 || (x)==PIX_FMT_BGR444LE \
165 || (x)==PIX_FMT_BGR444BE \
166 || (x)==PIX_FMT_RGB8 \
167 || (x)==PIX_FMT_BGR8 \
168 || (x)==PIX_FMT_RGB4_BYTE \
169 || (x)==PIX_FMT_BGR4_BYTE \
170 || (x)==PIX_FMT_RGB4 \
171 || (x)==PIX_FMT_BGR4 \
172 || (x)==PIX_FMT_MONOBLACK \
173 || (x)==PIX_FMT_MONOWHITE \
174 || (x)==PIX_FMT_NV12 \
175 || (x)==PIX_FMT_NV21 \
176 || (x)==PIX_FMT_GRAY16BE \
177 || (x)==PIX_FMT_GRAY16LE \
178 || (x)==PIX_FMT_GRAY8 \
179 || (x)==PIX_FMT_YUV410P \
180 || (x)==PIX_FMT_YUV440P \
181 || (x)==PIX_FMT_YUV422P10LE \
182 || (x)==PIX_FMT_YUV420P9LE \
183 || (x)==PIX_FMT_YUV420P10LE \
184 || (x)==PIX_FMT_YUV420P16LE \
185 || (x)==PIX_FMT_YUV422P16LE \
186 || (x)==PIX_FMT_YUV444P16LE \
187 || (x)==PIX_FMT_YUV422P10BE \
188 || (x)==PIX_FMT_YUV420P9BE \
189 || (x)==PIX_FMT_YUV420P10BE \
190 || (x)==PIX_FMT_YUV420P16BE \
191 || (x)==PIX_FMT_YUV422P16BE \
192 || (x)==PIX_FMT_YUV444P16BE \
195 int sws_isSupportedOutput(enum PixelFormat pix_fmt)
197 return isSupportedOut(pix_fmt);
200 extern const int32_t ff_yuv2rgb_coeffs[8][4];
202 #if FF_API_SWS_FORMAT_NAME
203 const char *sws_format_name(enum PixelFormat format)
205 return av_get_pix_fmt_name(format);
209 static double getSplineCoeff(double a, double b, double c, double d, double dist)
211 if (dist<=1.0) return ((d*dist + c)*dist + b)*dist +a;
212 else return getSplineCoeff( 0.0,
219 static int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,
220 int srcW, int dstW, int filterAlign, int one, int flags, int cpu_flags,
221 SwsVector *srcFilter, SwsVector *dstFilter, double param[2])
227 int64_t *filter=NULL;
228 int64_t *filter2=NULL;
229 const int64_t fone= 1LL<<54;
232 emms_c(); //FIXME this should not be required but it IS (even for non-MMX versions)
234 // NOTE: the +1 is for the MMX scaler which reads over the end
235 FF_ALLOC_OR_GOTO(NULL, *filterPos, (dstW+1)*sizeof(int16_t), fail);
237 if (FFABS(xInc - 0x10000) <10) { // unscaled
240 FF_ALLOCZ_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
242 for (i=0; i<dstW; i++) {
243 filter[i*filterSize]= fone;
247 } else if (flags&SWS_POINT) { // lame looking point sampling mode
251 FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
253 xDstInSrc= xInc/2 - 0x8000;
254 for (i=0; i<dstW; i++) {
255 int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
261 } else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) { // bilinear upscale
265 FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
267 xDstInSrc= xInc/2 - 0x8000;
268 for (i=0; i<dstW; i++) {
269 int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
273 //bilinear upscale / linear interpolate / area averaging
274 for (j=0; j<filterSize; j++) {
275 int64_t coeff= fone - FFABS((xx<<16) - xDstInSrc)*(fone>>16);
276 if (coeff<0) coeff=0;
277 filter[i*filterSize + j]= coeff;
286 if (flags&SWS_BICUBIC) sizeFactor= 4;
287 else if (flags&SWS_X) sizeFactor= 8;
288 else if (flags&SWS_AREA) sizeFactor= 1; //downscale only, for upscale it is bilinear
289 else if (flags&SWS_GAUSS) sizeFactor= 8; // infinite ;)
290 else if (flags&SWS_LANCZOS) sizeFactor= param[0] != SWS_PARAM_DEFAULT ? ceil(2*param[0]) : 6;
291 else if (flags&SWS_SINC) sizeFactor= 20; // infinite ;)
292 else if (flags&SWS_SPLINE) sizeFactor= 20; // infinite ;)
293 else if (flags&SWS_BILINEAR) sizeFactor= 2;
295 sizeFactor= 0; //GCC warning killer
299 if (xInc <= 1<<16) filterSize= 1 + sizeFactor; // upscale
300 else filterSize= 1 + (sizeFactor*srcW + dstW - 1)/ dstW;
302 if (filterSize > srcW-2) filterSize=srcW-2;
304 FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
306 xDstInSrc= xInc - 0x10000;
307 for (i=0; i<dstW; i++) {
308 int xx= (xDstInSrc - ((filterSize-2)<<16)) / (1<<17);
311 for (j=0; j<filterSize; j++) {
312 int64_t d= ((int64_t)FFABS((xx<<17) - xDstInSrc))<<13;
318 floatd= d * (1.0/(1<<30));
320 if (flags & SWS_BICUBIC) {
321 int64_t B= (param[0] != SWS_PARAM_DEFAULT ? param[0] : 0) * (1<<24);
322 int64_t C= (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1<<24);
323 int64_t dd = ( d*d)>>30;
324 int64_t ddd= (dd*d)>>30;
327 coeff = (12*(1<<24)-9*B-6*C)*ddd + (-18*(1<<24)+12*B+6*C)*dd + (6*(1<<24)-2*B)*(1<<30);
328 else if (d < 1LL<<31)
329 coeff = (-B-6*C)*ddd + (6*B+30*C)*dd + (-12*B-48*C)*d + (8*B+24*C)*(1<<30);
332 coeff *= fone>>(30+24);
334 /* else if (flags & SWS_X) {
335 double p= param ? param*0.01 : 0.3;
336 coeff = d ? sin(d*M_PI)/(d*M_PI) : 1.0;
337 coeff*= pow(2.0, - p*d*d);
339 else if (flags & SWS_X) {
340 double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
344 c = cos(floatd*M_PI);
347 if (c<0.0) c= -pow(-c, A);
349 coeff= (c*0.5 + 0.5)*fone;
350 } else if (flags & SWS_AREA) {
351 int64_t d2= d - (1<<29);
352 if (d2*xInc < -(1LL<<(29+16))) coeff= 1.0 * (1LL<<(30+16));
353 else if (d2*xInc < (1LL<<(29+16))) coeff= -d2*xInc + (1LL<<(29+16));
355 coeff *= fone>>(30+16);
356 } else if (flags & SWS_GAUSS) {
357 double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
358 coeff = (pow(2.0, - p*floatd*floatd))*fone;
359 } else if (flags & SWS_SINC) {
360 coeff = (d ? sin(floatd*M_PI)/(floatd*M_PI) : 1.0)*fone;
361 } else if (flags & SWS_LANCZOS) {
362 double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
363 coeff = (d ? sin(floatd*M_PI)*sin(floatd*M_PI/p)/(floatd*floatd*M_PI*M_PI/p) : 1.0)*fone;
364 if (floatd>p) coeff=0;
365 } else if (flags & SWS_BILINEAR) {
367 if (coeff<0) coeff=0;
369 } else if (flags & SWS_SPLINE) {
370 double p=-2.196152422706632;
371 coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, floatd) * fone;
373 coeff= 0.0; //GCC warning killer
377 filter[i*filterSize + j]= coeff;
384 /* apply src & dst Filter to filter -> filter2
387 assert(filterSize>0);
388 filter2Size= filterSize;
389 if (srcFilter) filter2Size+= srcFilter->length - 1;
390 if (dstFilter) filter2Size+= dstFilter->length - 1;
391 assert(filter2Size>0);
392 FF_ALLOCZ_OR_GOTO(NULL, filter2, filter2Size*dstW*sizeof(*filter2), fail);
394 for (i=0; i<dstW; i++) {
398 for (k=0; k<srcFilter->length; k++) {
399 for (j=0; j<filterSize; j++)
400 filter2[i*filter2Size + k + j] += srcFilter->coeff[k]*filter[i*filterSize + j];
403 for (j=0; j<filterSize; j++)
404 filter2[i*filter2Size + j]= filter[i*filterSize + j];
408 (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;
412 /* try to reduce the filter-size (step1 find size and shift left) */
413 // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).
415 for (i=dstW-1; i>=0; i--) {
416 int min= filter2Size;
420 /* get rid of near zero elements on the left by shifting left */
421 for (j=0; j<filter2Size; j++) {
423 cutOff += FFABS(filter2[i*filter2Size]);
425 if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;
427 /* preserve monotonicity because the core can't handle the filter otherwise */
428 if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;
430 // move filter coefficients left
431 for (k=1; k<filter2Size; k++)
432 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];
433 filter2[i*filter2Size + k - 1]= 0;
438 /* count near zeros on the right */
439 for (j=filter2Size-1; j>0; j--) {
440 cutOff += FFABS(filter2[i*filter2Size + j]);
442 if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;
446 if (min>minFilterSize) minFilterSize= min;
449 if (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) {
450 // we can handle the special case 4,
451 // so we don't want to go to the full 8
452 if (minFilterSize < 5)
455 // We really don't want to waste our time
456 // doing useless computation, so fall back on
457 // the scalar C code for very small filters.
458 // Vectorizing is worth it only if you have a
459 // decent-sized vector.
460 if (minFilterSize < 3)
464 if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
465 // special case for unscaled vertical filtering
466 if (minFilterSize == 1 && filterAlign == 2)
470 assert(minFilterSize > 0);
471 filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));
472 assert(filterSize > 0);
473 filter= av_malloc(filterSize*dstW*sizeof(*filter));
474 if (filterSize >= MAX_FILTER_SIZE*16/((flags&SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter)
476 *outFilterSize= filterSize;
478 if (flags&SWS_PRINT_INFO)
479 av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);
480 /* try to reduce the filter-size (step2 reduce it) */
481 for (i=0; i<dstW; i++) {
484 for (j=0; j<filterSize; j++) {
485 if (j>=filter2Size) filter[i*filterSize + j]= 0;
486 else filter[i*filterSize + j]= filter2[i*filter2Size + j];
487 if((flags & SWS_BITEXACT) && j>=minFilterSize)
488 filter[i*filterSize + j]= 0;
492 //FIXME try to align filterPos if possible
495 for (i=0; i<dstW; i++) {
497 if ((*filterPos)[i] < 0) {
498 // move filter coefficients left to compensate for filterPos
499 for (j=1; j<filterSize; j++) {
500 int left= FFMAX(j + (*filterPos)[i], 0);
501 filter[i*filterSize + left] += filter[i*filterSize + j];
502 filter[i*filterSize + j]=0;
507 if ((*filterPos)[i] + filterSize > srcW) {
508 int shift= (*filterPos)[i] + filterSize - srcW;
509 // move filter coefficients right to compensate for filterPos
510 for (j=filterSize-2; j>=0; j--) {
511 int right= FFMIN(j + shift, filterSize-1);
512 filter[i*filterSize +right] += filter[i*filterSize +j];
513 filter[i*filterSize +j]=0;
515 (*filterPos)[i]= srcW - filterSize;
519 // Note the +1 is for the MMX scaler which reads over the end
520 /* align at 16 for AltiVec (needed by hScale_altivec_real) */
521 FF_ALLOCZ_OR_GOTO(NULL, *outFilter, *outFilterSize*(dstW+1)*sizeof(int16_t), fail);
523 /* normalize & store in outFilter */
524 for (i=0; i<dstW; i++) {
529 for (j=0; j<filterSize; j++) {
530 sum+= filter[i*filterSize + j];
532 sum= (sum + one/2)/ one;
533 for (j=0; j<*outFilterSize; j++) {
534 int64_t v= filter[i*filterSize + j] + error;
535 int intV= ROUNDED_DIV(v, sum);
536 (*outFilter)[i*(*outFilterSize) + j]= intV;
541 (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end
542 for (i=0; i<*outFilterSize; i++) {
543 int j= dstW*(*outFilterSize);
544 (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];
555 static int initMMX2HScaler(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits)
558 x86_reg imm8OfPShufW1A;
559 x86_reg imm8OfPShufW2A;
560 x86_reg fragmentLengthA;
562 x86_reg imm8OfPShufW1B;
563 x86_reg imm8OfPShufW2B;
564 x86_reg fragmentLengthB;
569 // create an optimized horizontal scaling routine
570 /* This scaler is made of runtime-generated MMX2 code using specially
571 * tuned pshufw instructions. For every four output pixels, if four
572 * input pixels are enough for the fast bilinear scaling, then a chunk
573 * of fragmentB is used. If five input pixels are needed, then a chunk
574 * of fragmentA is used.
583 "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t"
584 "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t"
585 "movd 1(%%"REG_c", %%"REG_S"), %%mm1 \n\t"
586 "punpcklbw %%mm7, %%mm1 \n\t"
587 "punpcklbw %%mm7, %%mm0 \n\t"
588 "pshufw $0xFF, %%mm1, %%mm1 \n\t"
590 "pshufw $0xFF, %%mm0, %%mm0 \n\t"
592 "psubw %%mm1, %%mm0 \n\t"
593 "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t"
594 "pmullw %%mm3, %%mm0 \n\t"
595 "psllw $7, %%mm1 \n\t"
596 "paddw %%mm1, %%mm0 \n\t"
598 "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t"
600 "add $8, %%"REG_a" \n\t"
604 "lea " LOCAL_MANGLE(0b) ", %0 \n\t"
605 "lea " LOCAL_MANGLE(1b) ", %1 \n\t"
606 "lea " LOCAL_MANGLE(2b) ", %2 \n\t"
611 "lea " LOCAL_MANGLE(9b) ", %3 \n\t"
615 :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),
616 "=r" (fragmentLengthA)
623 "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t"
624 "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t"
625 "punpcklbw %%mm7, %%mm0 \n\t"
626 "pshufw $0xFF, %%mm0, %%mm1 \n\t"
628 "pshufw $0xFF, %%mm0, %%mm0 \n\t"
630 "psubw %%mm1, %%mm0 \n\t"
631 "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t"
632 "pmullw %%mm3, %%mm0 \n\t"
633 "psllw $7, %%mm1 \n\t"
634 "paddw %%mm1, %%mm0 \n\t"
636 "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t"
638 "add $8, %%"REG_a" \n\t"
642 "lea " LOCAL_MANGLE(0b) ", %0 \n\t"
643 "lea " LOCAL_MANGLE(1b) ", %1 \n\t"
644 "lea " LOCAL_MANGLE(2b) ", %2 \n\t"
649 "lea " LOCAL_MANGLE(9b) ", %3 \n\t"
653 :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),
654 "=r" (fragmentLengthB)
657 xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers
660 for (i=0; i<dstW/numSplits; i++) {
665 int b=((xpos+xInc)>>16) - xx;
666 int c=((xpos+xInc*2)>>16) - xx;
667 int d=((xpos+xInc*3)>>16) - xx;
669 uint8_t *fragment = (d+1<4) ? fragmentB : fragmentA;
670 x86_reg imm8OfPShufW1 = (d+1<4) ? imm8OfPShufW1B : imm8OfPShufW1A;
671 x86_reg imm8OfPShufW2 = (d+1<4) ? imm8OfPShufW2B : imm8OfPShufW2A;
672 x86_reg fragmentLength = (d+1<4) ? fragmentLengthB : fragmentLengthA;
673 int maxShift= 3-(d+inc);
677 filter[i ] = (( xpos & 0xFFFF) ^ 0xFFFF)>>9;
678 filter[i+1] = (((xpos+xInc ) & 0xFFFF) ^ 0xFFFF)>>9;
679 filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;
680 filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;
683 memcpy(filterCode + fragmentPos, fragment, fragmentLength);
685 filterCode[fragmentPos + imm8OfPShufW1]=
686 (a+inc) | ((b+inc)<<2) | ((c+inc)<<4) | ((d+inc)<<6);
687 filterCode[fragmentPos + imm8OfPShufW2]=
688 a | (b<<2) | (c<<4) | (d<<6);
690 if (i+4-inc>=dstW) shift=maxShift; //avoid overread
691 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align
693 if (shift && i>=shift) {
694 filterCode[fragmentPos + imm8OfPShufW1]+= 0x55*shift;
695 filterCode[fragmentPos + imm8OfPShufW2]+= 0x55*shift;
696 filterPos[i/2]-=shift;
700 fragmentPos+= fragmentLength;
703 filterCode[fragmentPos]= RET;
708 filterPos[((i/2)+1)&(~1)]= xpos>>16; // needed to jump to the next part
710 return fragmentPos + 1;
712 #endif /* HAVE_MMX2 */
714 static void getSubSampleFactors(int *h, int *v, enum PixelFormat format)
716 *h = av_pix_fmt_descriptors[format].log2_chroma_w;
717 *v = av_pix_fmt_descriptors[format].log2_chroma_h;
720 int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation)
722 memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);
723 memcpy(c->dstColorspaceTable, table, sizeof(int)*4);
725 c->brightness= brightness;
726 c->contrast = contrast;
727 c->saturation= saturation;
728 c->srcRange = srcRange;
729 c->dstRange = dstRange;
730 if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
732 c->dstFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[c->dstFormat]);
733 c->srcFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[c->srcFormat]);
735 ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);
738 if (HAVE_ALTIVEC && av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC)
739 ff_yuv2rgb_init_tables_altivec(c, inv_table, brightness, contrast, saturation);
743 int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation)
745 if (!c || isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
747 *inv_table = c->srcColorspaceTable;
748 *table = c->dstColorspaceTable;
749 *srcRange = c->srcRange;
750 *dstRange = c->dstRange;
751 *brightness= c->brightness;
752 *contrast = c->contrast;
753 *saturation= c->saturation;
758 static int handle_jpeg(enum PixelFormat *format)
761 case PIX_FMT_YUVJ420P: *format = PIX_FMT_YUV420P; return 1;
762 case PIX_FMT_YUVJ422P: *format = PIX_FMT_YUV422P; return 1;
763 case PIX_FMT_YUVJ444P: *format = PIX_FMT_YUV444P; return 1;
764 case PIX_FMT_YUVJ440P: *format = PIX_FMT_YUV440P; return 1;
769 SwsContext *sws_alloc_context(void)
771 SwsContext *c= av_mallocz(sizeof(SwsContext));
773 c->av_class = &sws_context_class;
774 av_opt_set_defaults(c);
779 int sws_init_context(SwsContext *c, SwsFilter *srcFilter, SwsFilter *dstFilter)
782 int usesVFilter, usesHFilter;
784 SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};
789 int dst_stride = FFALIGN(dstW * sizeof(int16_t)+66, 16);
790 int flags, cpu_flags;
791 enum PixelFormat srcFormat= c->srcFormat;
792 enum PixelFormat dstFormat= c->dstFormat;
794 cpu_flags = av_get_cpu_flags();
797 if (!rgb15to16) sws_rgb2rgb_init();
799 unscaled = (srcW == dstW && srcH == dstH);
801 if (!isSupportedIn(srcFormat)) {
802 av_log(c, AV_LOG_ERROR, "%s is not supported as input pixel format\n", av_get_pix_fmt_name(srcFormat));
803 return AVERROR(EINVAL);
805 if (!isSupportedOut(dstFormat)) {
806 av_log(c, AV_LOG_ERROR, "%s is not supported as output pixel format\n", av_get_pix_fmt_name(dstFormat));
807 return AVERROR(EINVAL);
810 i= flags & ( SWS_POINT
821 if(!i || (i & (i-1))) {
822 av_log(c, AV_LOG_ERROR, "Exactly one scaler algorithm must be chosen\n");
823 return AVERROR(EINVAL);
826 if (srcW<4 || srcH<1 || dstW<8 || dstH<1) { //FIXME check if these are enough and try to lowwer them after fixing the relevant parts of the code
827 av_log(c, AV_LOG_ERROR, "%dx%d -> %dx%d is invalid scaling dimension\n",
828 srcW, srcH, dstW, dstH);
829 return AVERROR(EINVAL);
832 if (!dstFilter) dstFilter= &dummyFilter;
833 if (!srcFilter) srcFilter= &dummyFilter;
835 c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;
836 c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;
837 c->dstFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[dstFormat]);
838 c->srcFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[srcFormat]);
839 c->vRounder= 4* 0x0001000100010001ULL;
841 usesVFilter = (srcFilter->lumV && srcFilter->lumV->length>1) ||
842 (srcFilter->chrV && srcFilter->chrV->length>1) ||
843 (dstFilter->lumV && dstFilter->lumV->length>1) ||
844 (dstFilter->chrV && dstFilter->chrV->length>1);
845 usesHFilter = (srcFilter->lumH && srcFilter->lumH->length>1) ||
846 (srcFilter->chrH && srcFilter->chrH->length>1) ||
847 (dstFilter->lumH && dstFilter->lumH->length>1) ||
848 (dstFilter->chrH && dstFilter->chrH->length>1);
850 getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);
851 getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);
853 // reuse chroma for 2 pixels RGB/BGR unless user wants full chroma interpolation
854 if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;
856 // drop some chroma lines if the user wants it
857 c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;
858 c->chrSrcVSubSample+= c->vChrDrop;
860 // drop every other pixel for chroma calculation unless user wants full chroma
861 if (isAnyRGB(srcFormat) && !(flags&SWS_FULL_CHR_H_INP)
862 && srcFormat!=PIX_FMT_RGB8 && srcFormat!=PIX_FMT_BGR8
863 && srcFormat!=PIX_FMT_RGB4 && srcFormat!=PIX_FMT_BGR4
864 && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE
865 && ((dstW>>c->chrDstHSubSample) <= (srcW>>1) || (flags&SWS_FAST_BILINEAR)))
866 c->chrSrcHSubSample=1;
868 // Note the -((-x)>>y) is so that we always round toward +inf.
869 c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);
870 c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);
871 c->chrDstW= -((-dstW) >> c->chrDstHSubSample);
872 c->chrDstH= -((-dstH) >> c->chrDstVSubSample);
874 /* unscaled special cases */
875 if (unscaled && !usesHFilter && !usesVFilter && (c->srcRange == c->dstRange || isAnyRGB(dstFormat))) {
876 ff_get_unscaled_swscale(c);
879 if (flags&SWS_PRINT_INFO)
880 av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",
881 av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
886 c->scalingBpp = FFMAX(av_pix_fmt_descriptors[srcFormat].comp[0].depth_minus1,
887 av_pix_fmt_descriptors[dstFormat].comp[0].depth_minus1) >= 15 ? 16 : 8;
889 if (c->scalingBpp == 16)
891 av_assert0(c->scalingBpp<=16);
892 FF_ALLOC_OR_GOTO(c, c->formatConvBuffer, FFALIGN(srcW*2+78, 16) * 2, fail);
893 if (HAVE_MMX2 && cpu_flags & AV_CPU_FLAG_MMX2 && c->scalingBpp == 8) {
894 c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;
895 if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR)) {
896 if (flags&SWS_PRINT_INFO)
897 av_log(c, AV_LOG_INFO, "output width is not a multiple of 32 -> no MMX2 scaler\n");
899 if (usesHFilter || isNBPS(c->srcFormat) || is16BPS(c->srcFormat) || isAnyRGB(c->srcFormat)) c->canMMX2BeUsed=0;
904 c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;
905 c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;
907 // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst
908 // but only for the FAST_BILINEAR mode otherwise do correct scaling
909 // n-2 is the last chrominance sample available
910 // this is not perfect, but no one should notice the difference, the more correct variant
911 // would be like the vertical one, but that would require some special code for the
912 // first and last pixel
913 if (flags&SWS_FAST_BILINEAR) {
914 if (c->canMMX2BeUsed) {
918 //we don't use the x86 asm scaler if MMX is available
919 else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
920 c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;
921 c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;
925 /* precalculate horizontal scaler filter coefficients */
928 // can't downscale !!!
929 if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR)) {
930 c->lumMmx2FilterCodeSize = initMMX2HScaler( dstW, c->lumXInc, NULL, NULL, NULL, 8);
931 c->chrMmx2FilterCodeSize = initMMX2HScaler(c->chrDstW, c->chrXInc, NULL, NULL, NULL, 4);
934 c->lumMmx2FilterCode = mmap(NULL, c->lumMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
935 c->chrMmx2FilterCode = mmap(NULL, c->chrMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
936 #elif HAVE_VIRTUALALLOC
937 c->lumMmx2FilterCode = VirtualAlloc(NULL, c->lumMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
938 c->chrMmx2FilterCode = VirtualAlloc(NULL, c->chrMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
940 c->lumMmx2FilterCode = av_malloc(c->lumMmx2FilterCodeSize);
941 c->chrMmx2FilterCode = av_malloc(c->chrMmx2FilterCodeSize);
945 if (c->lumMmx2FilterCode == MAP_FAILED || c->chrMmx2FilterCode == MAP_FAILED)
947 if (!c->lumMmx2FilterCode || !c->chrMmx2FilterCode)
949 return AVERROR(ENOMEM);
950 FF_ALLOCZ_OR_GOTO(c, c->hLumFilter , (dstW /8+8)*sizeof(int16_t), fail);
951 FF_ALLOCZ_OR_GOTO(c, c->hChrFilter , (c->chrDstW /4+8)*sizeof(int16_t), fail);
952 FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW /2/8+8)*sizeof(int32_t), fail);
953 FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW/2/4+8)*sizeof(int32_t), fail);
955 initMMX2HScaler( dstW, c->lumXInc, c->lumMmx2FilterCode, c->hLumFilter, c->hLumFilterPos, 8);
956 initMMX2HScaler(c->chrDstW, c->chrXInc, c->chrMmx2FilterCode, c->hChrFilter, c->hChrFilterPos, 4);
959 mprotect(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize, PROT_EXEC | PROT_READ);
960 mprotect(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize, PROT_EXEC | PROT_READ);
963 #endif /* HAVE_MMX2 */
965 const int filterAlign=
966 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? 4 :
967 (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) ? 8 :
970 if (initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,
971 srcW , dstW, filterAlign, 1<<14,
972 (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags, cpu_flags,
973 srcFilter->lumH, dstFilter->lumH, c->param) < 0)
975 if (initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,
976 c->chrSrcW, c->chrDstW, filterAlign, 1<<14,
977 (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags, cpu_flags,
978 srcFilter->chrH, dstFilter->chrH, c->param) < 0)
981 } // initialize horizontal stuff
983 /* precalculate vertical scaler filter coefficients */
985 const int filterAlign=
986 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :
987 (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) ? 8 :
990 if (initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,
991 srcH , dstH, filterAlign, (1<<12),
992 (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags, cpu_flags,
993 srcFilter->lumV, dstFilter->lumV, c->param) < 0)
995 if (initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,
996 c->chrSrcH, c->chrDstH, filterAlign, (1<<12),
997 (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags, cpu_flags,
998 srcFilter->chrV, dstFilter->chrV, c->param) < 0)
1002 FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof (vector signed short)*c->vLumFilterSize*c->dstH, fail);
1003 FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH, fail);
1005 for (i=0;i<c->vLumFilterSize*c->dstH;i++) {
1007 short *p = (short *)&c->vYCoeffsBank[i];
1009 p[j] = c->vLumFilter[i];
1012 for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {
1014 short *p = (short *)&c->vCCoeffsBank[i];
1016 p[j] = c->vChrFilter[i];
1021 // calculate buffer sizes so that they won't run out while handling these damn slices
1022 c->vLumBufSize= c->vLumFilterSize;
1023 c->vChrBufSize= c->vChrFilterSize;
1024 for (i=0; i<dstH; i++) {
1025 int chrI= (int64_t)i*c->chrDstH / dstH;
1026 int nextSlice= FFMAX(c->vLumFilterPos[i ] + c->vLumFilterSize - 1,
1027 ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));
1029 nextSlice>>= c->chrSrcVSubSample;
1030 nextSlice<<= c->chrSrcVSubSample;
1031 if (c->vLumFilterPos[i ] + c->vLumBufSize < nextSlice)
1032 c->vLumBufSize= nextSlice - c->vLumFilterPos[i];
1033 if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))
1034 c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];
1037 // allocate pixbufs (we use dynamic allocation because otherwise we would need to
1038 // allocate several megabytes to handle all possible cases)
1039 FF_ALLOC_OR_GOTO(c, c->lumPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);
1040 FF_ALLOC_OR_GOTO(c, c->chrUPixBuf, c->vChrBufSize*2*sizeof(int16_t*), fail);
1041 FF_ALLOC_OR_GOTO(c, c->chrVPixBuf, c->vChrBufSize*2*sizeof(int16_t*), fail);
1042 if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat))
1043 FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);
1044 //Note we need at least one pixel more at the end because of the MMX code (just in case someone wanna replace the 4000/8000)
1045 /* align at 16 bytes for AltiVec */
1046 for (i=0; i<c->vLumBufSize; i++) {
1047 FF_ALLOCZ_OR_GOTO(c, c->lumPixBuf[i+c->vLumBufSize], dst_stride+1, fail);
1048 c->lumPixBuf[i] = c->lumPixBuf[i+c->vLumBufSize];
1050 c->uv_off = dst_stride>>1;
1051 c->uv_offx2 = dst_stride;
1052 for (i=0; i<c->vChrBufSize; i++) {
1053 FF_ALLOC_OR_GOTO(c, c->chrUPixBuf[i+c->vChrBufSize], dst_stride*2+1, fail);
1054 c->chrUPixBuf[i] = c->chrUPixBuf[i+c->vChrBufSize];
1055 c->chrVPixBuf[i] = c->chrVPixBuf[i+c->vChrBufSize] = c->chrUPixBuf[i] + (dst_stride >> 1);
1057 if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf)
1058 for (i=0; i<c->vLumBufSize; i++) {
1059 FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf[i+c->vLumBufSize], dst_stride+1, fail);
1060 c->alpPixBuf[i] = c->alpPixBuf[i+c->vLumBufSize];
1063 //try to avoid drawing green stuff between the right end and the stride end
1064 for (i=0; i<c->vChrBufSize; i++)
1065 if(av_pix_fmt_descriptors[c->dstFormat].comp[0].depth_minus1 == 15){
1066 av_assert0(c->scalingBpp == 16);
1067 for(j=0; j<dst_stride/2+1; j++)
1068 ((int32_t*)(c->chrUPixBuf[i]))[j] = 1<<18;
1070 for(j=0; j<dst_stride+1; j++)
1071 ((int16_t*)(c->chrUPixBuf[i]))[j] = 1<<14;
1073 assert(c->chrDstH <= dstH);
1075 if (flags&SWS_PRINT_INFO) {
1076 if (flags&SWS_FAST_BILINEAR) av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");
1077 else if (flags&SWS_BILINEAR) av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");
1078 else if (flags&SWS_BICUBIC) av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");
1079 else if (flags&SWS_X) av_log(c, AV_LOG_INFO, "Experimental scaler, ");
1080 else if (flags&SWS_POINT) av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");
1081 else if (flags&SWS_AREA) av_log(c, AV_LOG_INFO, "Area Averaging scaler, ");
1082 else if (flags&SWS_BICUBLIN) av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");
1083 else if (flags&SWS_GAUSS) av_log(c, AV_LOG_INFO, "Gaussian scaler, ");
1084 else if (flags&SWS_SINC) av_log(c, AV_LOG_INFO, "Sinc scaler, ");
1085 else if (flags&SWS_LANCZOS) av_log(c, AV_LOG_INFO, "Lanczos scaler, ");
1086 else if (flags&SWS_SPLINE) av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");
1087 else av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");
1089 av_log(c, AV_LOG_INFO, "from %s to %s%s ",
1090 av_get_pix_fmt_name(srcFormat),
1092 dstFormat == PIX_FMT_BGR555 || dstFormat == PIX_FMT_BGR565 ||
1093 dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE ||
1094 dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE ? "dithered " : "",
1098 av_get_pix_fmt_name(dstFormat));
1100 if (HAVE_MMX2 && cpu_flags & AV_CPU_FLAG_MMX2) av_log(c, AV_LOG_INFO, "using MMX2\n");
1101 else if (HAVE_AMD3DNOW && cpu_flags & AV_CPU_FLAG_3DNOW) av_log(c, AV_LOG_INFO, "using 3DNOW\n");
1102 else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) av_log(c, AV_LOG_INFO, "using MMX\n");
1103 else if (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) av_log(c, AV_LOG_INFO, "using AltiVec\n");
1104 else av_log(c, AV_LOG_INFO, "using C\n");
1106 if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
1107 if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))
1108 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");
1110 if (c->hLumFilterSize==4)
1111 av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal luminance scaling\n");
1112 else if (c->hLumFilterSize==8)
1113 av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal luminance scaling\n");
1115 av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal luminance scaling\n");
1117 if (c->hChrFilterSize==4)
1118 av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal chrominance scaling\n");
1119 else if (c->hChrFilterSize==8)
1120 av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal chrominance scaling\n");
1122 av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal chrominance scaling\n");
1126 av_log(c, AV_LOG_VERBOSE, "using x86 asm scaler for horizontal scaling\n");
1128 if (flags & SWS_FAST_BILINEAR)
1129 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR C scaler for horizontal scaling\n");
1131 av_log(c, AV_LOG_VERBOSE, "using C scaler for horizontal scaling\n");
1134 if (isPlanarYUV(dstFormat)) {
1135 if (c->vLumFilterSize==1)
1136 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n",
1137 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1139 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (YV12 like)\n",
1140 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1142 if (c->vLumFilterSize==1 && c->vChrFilterSize==2)
1143 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"
1144 " 2-tap scaler for vertical chrominance scaling (BGR)\n",
1145 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1146 else if (c->vLumFilterSize==2 && c->vChrFilterSize==2)
1147 av_log(c, AV_LOG_VERBOSE, "using 2-tap linear %s scaler for vertical scaling (BGR)\n",
1148 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1150 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (BGR)\n",
1151 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1154 if (dstFormat==PIX_FMT_BGR24)
1155 av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR24 converter\n",
1156 (HAVE_MMX2 && cpu_flags & AV_CPU_FLAG_MMX2) ? "MMX2" :
1157 ((HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C"));
1158 else if (dstFormat==PIX_FMT_RGB32)
1159 av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR32 converter\n",
1160 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1161 else if (dstFormat==PIX_FMT_BGR565)
1162 av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 converter\n",
1163 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1164 else if (dstFormat==PIX_FMT_BGR555)
1165 av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 converter\n",
1166 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1167 else if (dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE ||
1168 dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE)
1169 av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR12 converter\n",
1170 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1172 av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
1173 av_log(c, AV_LOG_DEBUG, "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1174 c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
1175 av_log(c, AV_LOG_DEBUG, "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1176 c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);
1179 c->swScale= ff_getSwsFunc(c);
1181 fail: //FIXME replace things by appropriate error codes
1185 #if FF_API_SWS_GETCONTEXT
1186 SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
1187 int dstW, int dstH, enum PixelFormat dstFormat, int flags,
1188 SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
1192 if(!(c=sws_alloc_context()))
1200 c->srcRange = handle_jpeg(&srcFormat);
1201 c->dstRange = handle_jpeg(&dstFormat);
1202 c->srcFormat= srcFormat;
1203 c->dstFormat= dstFormat;
1206 c->param[0] = param[0];
1207 c->param[1] = param[1];
1209 sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], c->srcRange, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT] /* FIXME*/, c->dstRange, 0, 1<<16, 1<<16);
1211 if(sws_init_context(c, srcFilter, dstFilter) < 0){
1220 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
1221 float lumaSharpen, float chromaSharpen,
1222 float chromaHShift, float chromaVShift,
1225 SwsFilter *filter= av_malloc(sizeof(SwsFilter));
1229 if (lumaGBlur!=0.0) {
1230 filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);
1231 filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);
1233 filter->lumH= sws_getIdentityVec();
1234 filter->lumV= sws_getIdentityVec();
1237 if (chromaGBlur!=0.0) {
1238 filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);
1239 filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);
1241 filter->chrH= sws_getIdentityVec();
1242 filter->chrV= sws_getIdentityVec();
1245 if (chromaSharpen!=0.0) {
1246 SwsVector *id= sws_getIdentityVec();
1247 sws_scaleVec(filter->chrH, -chromaSharpen);
1248 sws_scaleVec(filter->chrV, -chromaSharpen);
1249 sws_addVec(filter->chrH, id);
1250 sws_addVec(filter->chrV, id);
1254 if (lumaSharpen!=0.0) {
1255 SwsVector *id= sws_getIdentityVec();
1256 sws_scaleVec(filter->lumH, -lumaSharpen);
1257 sws_scaleVec(filter->lumV, -lumaSharpen);
1258 sws_addVec(filter->lumH, id);
1259 sws_addVec(filter->lumV, id);
1263 if (chromaHShift != 0.0)
1264 sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));
1266 if (chromaVShift != 0.0)
1267 sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));
1269 sws_normalizeVec(filter->chrH, 1.0);
1270 sws_normalizeVec(filter->chrV, 1.0);
1271 sws_normalizeVec(filter->lumH, 1.0);
1272 sws_normalizeVec(filter->lumV, 1.0);
1274 if (verbose) sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);
1275 if (verbose) sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);
1280 SwsVector *sws_allocVec(int length)
1282 SwsVector *vec = av_malloc(sizeof(SwsVector));
1285 vec->length = length;
1286 vec->coeff = av_malloc(sizeof(double) * length);
1292 SwsVector *sws_getGaussianVec(double variance, double quality)
1294 const int length= (int)(variance*quality + 0.5) | 1;
1296 double middle= (length-1)*0.5;
1297 SwsVector *vec= sws_allocVec(length);
1302 for (i=0; i<length; i++) {
1303 double dist= i-middle;
1304 vec->coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*M_PI);
1307 sws_normalizeVec(vec, 1.0);
1312 SwsVector *sws_getConstVec(double c, int length)
1315 SwsVector *vec= sws_allocVec(length);
1320 for (i=0; i<length; i++)
1326 SwsVector *sws_getIdentityVec(void)
1328 return sws_getConstVec(1.0, 1);
1331 static double sws_dcVec(SwsVector *a)
1336 for (i=0; i<a->length; i++)
1342 void sws_scaleVec(SwsVector *a, double scalar)
1346 for (i=0; i<a->length; i++)
1347 a->coeff[i]*= scalar;
1350 void sws_normalizeVec(SwsVector *a, double height)
1352 sws_scaleVec(a, height/sws_dcVec(a));
1355 static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b)
1357 int length= a->length + b->length - 1;
1359 SwsVector *vec= sws_getConstVec(0.0, length);
1364 for (i=0; i<a->length; i++) {
1365 for (j=0; j<b->length; j++) {
1366 vec->coeff[i+j]+= a->coeff[i]*b->coeff[j];
1373 static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b)
1375 int length= FFMAX(a->length, b->length);
1377 SwsVector *vec= sws_getConstVec(0.0, length);
1382 for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
1383 for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];
1388 static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b)
1390 int length= FFMAX(a->length, b->length);
1392 SwsVector *vec= sws_getConstVec(0.0, length);
1397 for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
1398 for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];
1403 /* shift left / or right if "shift" is negative */
1404 static SwsVector *sws_getShiftedVec(SwsVector *a, int shift)
1406 int length= a->length + FFABS(shift)*2;
1408 SwsVector *vec= sws_getConstVec(0.0, length);
1413 for (i=0; i<a->length; i++) {
1414 vec->coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];
1420 void sws_shiftVec(SwsVector *a, int shift)
1422 SwsVector *shifted= sws_getShiftedVec(a, shift);
1424 a->coeff= shifted->coeff;
1425 a->length= shifted->length;
1429 void sws_addVec(SwsVector *a, SwsVector *b)
1431 SwsVector *sum= sws_sumVec(a, b);
1433 a->coeff= sum->coeff;
1434 a->length= sum->length;
1438 void sws_subVec(SwsVector *a, SwsVector *b)
1440 SwsVector *diff= sws_diffVec(a, b);
1442 a->coeff= diff->coeff;
1443 a->length= diff->length;
1447 void sws_convVec(SwsVector *a, SwsVector *b)
1449 SwsVector *conv= sws_getConvVec(a, b);
1451 a->coeff= conv->coeff;
1452 a->length= conv->length;
1456 SwsVector *sws_cloneVec(SwsVector *a)
1459 SwsVector *vec= sws_allocVec(a->length);
1464 for (i=0; i<a->length; i++) vec->coeff[i]= a->coeff[i];
1469 void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)
1476 for (i=0; i<a->length; i++)
1477 if (a->coeff[i]>max) max= a->coeff[i];
1479 for (i=0; i<a->length; i++)
1480 if (a->coeff[i]<min) min= a->coeff[i];
1484 for (i=0; i<a->length; i++) {
1485 int x= (int)((a->coeff[i]-min)*60.0/range +0.5);
1486 av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);
1487 for (;x>0; x--) av_log(log_ctx, log_level, " ");
1488 av_log(log_ctx, log_level, "|\n");
1492 #if LIBSWSCALE_VERSION_MAJOR < 1
1493 void sws_printVec(SwsVector *a)
1495 sws_printVec2(a, NULL, AV_LOG_DEBUG);
1499 void sws_freeVec(SwsVector *a)
1502 av_freep(&a->coeff);
1507 void sws_freeFilter(SwsFilter *filter)
1509 if (!filter) return;
1511 if (filter->lumH) sws_freeVec(filter->lumH);
1512 if (filter->lumV) sws_freeVec(filter->lumV);
1513 if (filter->chrH) sws_freeVec(filter->chrH);
1514 if (filter->chrV) sws_freeVec(filter->chrV);
1518 void sws_freeContext(SwsContext *c)
1524 for (i=0; i<c->vLumBufSize; i++)
1525 av_freep(&c->lumPixBuf[i]);
1526 av_freep(&c->lumPixBuf);
1529 if (c->chrUPixBuf) {
1530 for (i=0; i<c->vChrBufSize; i++)
1531 av_freep(&c->chrUPixBuf[i]);
1532 av_freep(&c->chrUPixBuf);
1533 av_freep(&c->chrVPixBuf);
1536 if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {
1537 for (i=0; i<c->vLumBufSize; i++)
1538 av_freep(&c->alpPixBuf[i]);
1539 av_freep(&c->alpPixBuf);
1542 av_freep(&c->vLumFilter);
1543 av_freep(&c->vChrFilter);
1544 av_freep(&c->hLumFilter);
1545 av_freep(&c->hChrFilter);
1547 av_freep(&c->vYCoeffsBank);
1548 av_freep(&c->vCCoeffsBank);
1551 av_freep(&c->vLumFilterPos);
1552 av_freep(&c->vChrFilterPos);
1553 av_freep(&c->hLumFilterPos);
1554 av_freep(&c->hChrFilterPos);
1557 #ifdef MAP_ANONYMOUS
1558 if (c->lumMmx2FilterCode) munmap(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize);
1559 if (c->chrMmx2FilterCode) munmap(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize);
1560 #elif HAVE_VIRTUALALLOC
1561 if (c->lumMmx2FilterCode) VirtualFree(c->lumMmx2FilterCode, 0, MEM_RELEASE);
1562 if (c->chrMmx2FilterCode) VirtualFree(c->chrMmx2FilterCode, 0, MEM_RELEASE);
1564 av_free(c->lumMmx2FilterCode);
1565 av_free(c->chrMmx2FilterCode);
1567 c->lumMmx2FilterCode=NULL;
1568 c->chrMmx2FilterCode=NULL;
1569 #endif /* HAVE_MMX */
1571 av_freep(&c->yuvTable);
1572 av_freep(&c->formatConvBuffer);
1577 struct SwsContext *sws_getCachedContext(struct SwsContext *context,
1578 int srcW, int srcH, enum PixelFormat srcFormat,
1579 int dstW, int dstH, enum PixelFormat dstFormat, int flags,
1580 SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
1582 static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};
1585 param = default_param;
1588 (context->srcW != srcW ||
1589 context->srcH != srcH ||
1590 context->srcFormat != srcFormat ||
1591 context->dstW != dstW ||
1592 context->dstH != dstH ||
1593 context->dstFormat != dstFormat ||
1594 context->flags != flags ||
1595 context->param[0] != param[0] ||
1596 context->param[1] != param[1])) {
1597 sws_freeContext(context);
1602 if (!(context = sws_alloc_context()))
1604 context->srcW = srcW;
1605 context->srcH = srcH;
1606 context->srcRange = handle_jpeg(&srcFormat);
1607 context->srcFormat = srcFormat;
1608 context->dstW = dstW;
1609 context->dstH = dstH;
1610 context->dstRange = handle_jpeg(&dstFormat);
1611 context->dstFormat = dstFormat;
1612 context->flags = flags;
1613 context->param[0] = param[0];
1614 context->param[1] = param[1];
1615 sws_setColorspaceDetails(context, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], context->srcRange, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT] /* FIXME*/, context->dstRange, 0, 1<<16, 1<<16);
1616 if (sws_init_context(context, srcFilter, dstFilter) < 0) {
1617 sws_freeContext(context);