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"
50 unsigned swscale_version(void)
52 return LIBSWSCALE_VERSION_INT;
55 const char *swscale_configuration(void)
57 return FFMPEG_CONFIGURATION;
60 const char *swscale_license(void)
62 #define LICENSE_PREFIX "libswscale license: "
63 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
66 #define RET 0xC3 //near return opcode for x86
68 #define isSupportedIn(x) ( \
69 (x)==PIX_FMT_YUV420P \
70 || (x)==PIX_FMT_YUVA420P \
71 || (x)==PIX_FMT_YUYV422 \
72 || (x)==PIX_FMT_UYVY422 \
73 || (x)==PIX_FMT_RGB48BE \
74 || (x)==PIX_FMT_RGB48LE \
75 || (x)==PIX_FMT_RGB32 \
76 || (x)==PIX_FMT_RGB32_1 \
77 || (x)==PIX_FMT_BGR48BE \
78 || (x)==PIX_FMT_BGR48LE \
79 || (x)==PIX_FMT_BGR24 \
80 || (x)==PIX_FMT_BGR565 \
81 || (x)==PIX_FMT_BGR555 \
82 || (x)==PIX_FMT_BGR32 \
83 || (x)==PIX_FMT_BGR32_1 \
84 || (x)==PIX_FMT_RGB24 \
85 || (x)==PIX_FMT_RGB565 \
86 || (x)==PIX_FMT_RGB555 \
87 || (x)==PIX_FMT_GRAY8 \
88 || (x)==PIX_FMT_GRAY8A \
89 || (x)==PIX_FMT_YUV410P \
90 || (x)==PIX_FMT_YUV440P \
91 || (x)==PIX_FMT_NV12 \
92 || (x)==PIX_FMT_NV21 \
93 || (x)==PIX_FMT_GRAY16BE \
94 || (x)==PIX_FMT_GRAY16LE \
95 || (x)==PIX_FMT_YUV444P \
96 || (x)==PIX_FMT_YUV422P \
97 || (x)==PIX_FMT_YUV411P \
98 || (x)==PIX_FMT_YUVJ420P \
99 || (x)==PIX_FMT_YUVJ422P \
100 || (x)==PIX_FMT_YUVJ440P \
101 || (x)==PIX_FMT_YUVJ444P \
102 || (x)==PIX_FMT_PAL8 \
103 || (x)==PIX_FMT_BGR8 \
104 || (x)==PIX_FMT_RGB8 \
105 || (x)==PIX_FMT_BGR4_BYTE \
106 || (x)==PIX_FMT_RGB4_BYTE \
107 || (x)==PIX_FMT_YUV440P \
108 || (x)==PIX_FMT_MONOWHITE \
109 || (x)==PIX_FMT_MONOBLACK \
110 || (x)==PIX_FMT_YUV420P9LE \
111 || (x)==PIX_FMT_YUV420P10LE \
112 || (x)==PIX_FMT_YUV420P16LE \
113 || (x)==PIX_FMT_YUV422P16LE \
114 || (x)==PIX_FMT_YUV444P16LE \
115 || (x)==PIX_FMT_YUV420P9BE \
116 || (x)==PIX_FMT_YUV420P10BE \
117 || (x)==PIX_FMT_YUV420P16BE \
118 || (x)==PIX_FMT_YUV422P16BE \
119 || (x)==PIX_FMT_YUV444P16BE \
120 || (x)==PIX_FMT_YUV422P10 \
123 int sws_isSupportedInput(enum PixelFormat pix_fmt)
125 return isSupportedIn(pix_fmt);
128 #define isSupportedOut(x) ( \
129 (x)==PIX_FMT_YUV420P \
130 || (x)==PIX_FMT_YUVA420P \
131 || (x)==PIX_FMT_YUYV422 \
132 || (x)==PIX_FMT_UYVY422 \
133 || (x)==PIX_FMT_YUV444P \
134 || (x)==PIX_FMT_YUV422P \
135 || (x)==PIX_FMT_YUV411P \
136 || (x)==PIX_FMT_YUVJ420P \
137 || (x)==PIX_FMT_YUVJ422P \
138 || (x)==PIX_FMT_YUVJ440P \
139 || (x)==PIX_FMT_YUVJ444P \
141 || (x)==PIX_FMT_NV12 \
142 || (x)==PIX_FMT_NV21 \
143 || (x)==PIX_FMT_GRAY16BE \
144 || (x)==PIX_FMT_GRAY16LE \
145 || (x)==PIX_FMT_GRAY8 \
146 || (x)==PIX_FMT_YUV410P \
147 || (x)==PIX_FMT_YUV440P \
148 || (x)==PIX_FMT_YUV422P10 \
149 || (x)==PIX_FMT_YUV420P9LE \
150 || (x)==PIX_FMT_YUV420P10LE \
151 || (x)==PIX_FMT_YUV420P16LE \
152 || (x)==PIX_FMT_YUV422P16LE \
153 || (x)==PIX_FMT_YUV444P16LE \
154 || (x)==PIX_FMT_YUV420P9BE \
155 || (x)==PIX_FMT_YUV420P10BE \
156 || (x)==PIX_FMT_YUV420P16BE \
157 || (x)==PIX_FMT_YUV422P16BE \
158 || (x)==PIX_FMT_YUV444P16BE \
161 int sws_isSupportedOutput(enum PixelFormat pix_fmt)
163 return isSupportedOut(pix_fmt);
166 extern const int32_t ff_yuv2rgb_coeffs[8][4];
168 static double getSplineCoeff(double a, double b, double c, double d, double dist)
170 if (dist<=1.0) return ((d*dist + c)*dist + b)*dist +a;
171 else return getSplineCoeff( 0.0,
178 static int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,
179 int srcW, int dstW, int filterAlign, int one, int flags, int cpu_flags,
180 SwsVector *srcFilter, SwsVector *dstFilter, double param[2])
186 int64_t *filter=NULL;
187 int64_t *filter2=NULL;
188 const int64_t fone= 1LL<<54;
191 emms_c(); //FIXME this should not be required but it IS (even for non-MMX versions)
193 // NOTE: the +1 is for the MMX scaler which reads over the end
194 FF_ALLOC_OR_GOTO(NULL, *filterPos, (dstW+1)*sizeof(int16_t), fail);
196 if (FFABS(xInc - 0x10000) <10) { // unscaled
199 FF_ALLOCZ_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
201 for (i=0; i<dstW; i++) {
202 filter[i*filterSize]= fone;
206 } else if (flags&SWS_POINT) { // lame looking point sampling mode
210 FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
212 xDstInSrc= xInc/2 - 0x8000;
213 for (i=0; i<dstW; i++) {
214 int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
220 } else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) { // bilinear upscale
224 FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
226 xDstInSrc= xInc/2 - 0x8000;
227 for (i=0; i<dstW; i++) {
228 int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
232 //bilinear upscale / linear interpolate / area averaging
233 for (j=0; j<filterSize; j++) {
234 int64_t coeff= fone - FFABS((xx<<16) - xDstInSrc)*(fone>>16);
235 if (coeff<0) coeff=0;
236 filter[i*filterSize + j]= coeff;
245 if (flags&SWS_BICUBIC) sizeFactor= 4;
246 else if (flags&SWS_X) sizeFactor= 8;
247 else if (flags&SWS_AREA) sizeFactor= 1; //downscale only, for upscale it is bilinear
248 else if (flags&SWS_GAUSS) sizeFactor= 8; // infinite ;)
249 else if (flags&SWS_LANCZOS) sizeFactor= param[0] != SWS_PARAM_DEFAULT ? ceil(2*param[0]) : 6;
250 else if (flags&SWS_SINC) sizeFactor= 20; // infinite ;)
251 else if (flags&SWS_SPLINE) sizeFactor= 20; // infinite ;)
252 else if (flags&SWS_BILINEAR) sizeFactor= 2;
254 sizeFactor= 0; //GCC warning killer
258 if (xInc <= 1<<16) filterSize= 1 + sizeFactor; // upscale
259 else filterSize= 1 + (sizeFactor*srcW + dstW - 1)/ dstW;
261 if (filterSize > srcW-2) filterSize=srcW-2;
263 FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
265 xDstInSrc= xInc - 0x10000;
266 for (i=0; i<dstW; i++) {
267 int xx= (xDstInSrc - ((filterSize-2)<<16)) / (1<<17);
270 for (j=0; j<filterSize; j++) {
271 int64_t d= ((int64_t)FFABS((xx<<17) - xDstInSrc))<<13;
277 floatd= d * (1.0/(1<<30));
279 if (flags & SWS_BICUBIC) {
280 int64_t B= (param[0] != SWS_PARAM_DEFAULT ? param[0] : 0) * (1<<24);
281 int64_t C= (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1<<24);
282 int64_t dd = ( d*d)>>30;
283 int64_t ddd= (dd*d)>>30;
286 coeff = (12*(1<<24)-9*B-6*C)*ddd + (-18*(1<<24)+12*B+6*C)*dd + (6*(1<<24)-2*B)*(1<<30);
287 else if (d < 1LL<<31)
288 coeff = (-B-6*C)*ddd + (6*B+30*C)*dd + (-12*B-48*C)*d + (8*B+24*C)*(1<<30);
291 coeff *= fone>>(30+24);
293 /* else if (flags & SWS_X) {
294 double p= param ? param*0.01 : 0.3;
295 coeff = d ? sin(d*M_PI)/(d*M_PI) : 1.0;
296 coeff*= pow(2.0, - p*d*d);
298 else if (flags & SWS_X) {
299 double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
303 c = cos(floatd*M_PI);
306 if (c<0.0) c= -pow(-c, A);
308 coeff= (c*0.5 + 0.5)*fone;
309 } else if (flags & SWS_AREA) {
310 int64_t d2= d - (1<<29);
311 if (d2*xInc < -(1LL<<(29+16))) coeff= 1.0 * (1LL<<(30+16));
312 else if (d2*xInc < (1LL<<(29+16))) coeff= -d2*xInc + (1LL<<(29+16));
314 coeff *= fone>>(30+16);
315 } else if (flags & SWS_GAUSS) {
316 double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
317 coeff = (pow(2.0, - p*floatd*floatd))*fone;
318 } else if (flags & SWS_SINC) {
319 coeff = (d ? sin(floatd*M_PI)/(floatd*M_PI) : 1.0)*fone;
320 } else if (flags & SWS_LANCZOS) {
321 double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
322 coeff = (d ? sin(floatd*M_PI)*sin(floatd*M_PI/p)/(floatd*floatd*M_PI*M_PI/p) : 1.0)*fone;
323 if (floatd>p) coeff=0;
324 } else if (flags & SWS_BILINEAR) {
326 if (coeff<0) coeff=0;
328 } else if (flags & SWS_SPLINE) {
329 double p=-2.196152422706632;
330 coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, floatd) * fone;
332 coeff= 0.0; //GCC warning killer
336 filter[i*filterSize + j]= coeff;
343 /* apply src & dst Filter to filter -> filter2
346 assert(filterSize>0);
347 filter2Size= filterSize;
348 if (srcFilter) filter2Size+= srcFilter->length - 1;
349 if (dstFilter) filter2Size+= dstFilter->length - 1;
350 assert(filter2Size>0);
351 FF_ALLOCZ_OR_GOTO(NULL, filter2, filter2Size*dstW*sizeof(*filter2), fail);
353 for (i=0; i<dstW; i++) {
357 for (k=0; k<srcFilter->length; k++) {
358 for (j=0; j<filterSize; j++)
359 filter2[i*filter2Size + k + j] += srcFilter->coeff[k]*filter[i*filterSize + j];
362 for (j=0; j<filterSize; j++)
363 filter2[i*filter2Size + j]= filter[i*filterSize + j];
367 (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;
371 /* try to reduce the filter-size (step1 find size and shift left) */
372 // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).
374 for (i=dstW-1; i>=0; i--) {
375 int min= filter2Size;
379 /* get rid of near zero elements on the left by shifting left */
380 for (j=0; j<filter2Size; j++) {
382 cutOff += FFABS(filter2[i*filter2Size]);
384 if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;
386 /* preserve monotonicity because the core can't handle the filter otherwise */
387 if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;
389 // move filter coefficients left
390 for (k=1; k<filter2Size; k++)
391 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];
392 filter2[i*filter2Size + k - 1]= 0;
397 /* count near zeros on the right */
398 for (j=filter2Size-1; j>0; j--) {
399 cutOff += FFABS(filter2[i*filter2Size + j]);
401 if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;
405 if (min>minFilterSize) minFilterSize= min;
408 if (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) {
409 // we can handle the special case 4,
410 // so we don't want to go to the full 8
411 if (minFilterSize < 5)
414 // We really don't want to waste our time
415 // doing useless computation, so fall back on
416 // the scalar C code for very small filters.
417 // Vectorizing is worth it only if you have a
418 // decent-sized vector.
419 if (minFilterSize < 3)
423 if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
424 // special case for unscaled vertical filtering
425 if (minFilterSize == 1 && filterAlign == 2)
429 assert(minFilterSize > 0);
430 filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));
431 assert(filterSize > 0);
432 filter= av_malloc(filterSize*dstW*sizeof(*filter));
433 if (filterSize >= MAX_FILTER_SIZE*16/((flags&SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter)
435 *outFilterSize= filterSize;
437 if (flags&SWS_PRINT_INFO)
438 av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);
439 /* try to reduce the filter-size (step2 reduce it) */
440 for (i=0; i<dstW; i++) {
443 for (j=0; j<filterSize; j++) {
444 if (j>=filter2Size) filter[i*filterSize + j]= 0;
445 else filter[i*filterSize + j]= filter2[i*filter2Size + j];
446 if((flags & SWS_BITEXACT) && j>=minFilterSize)
447 filter[i*filterSize + j]= 0;
451 //FIXME try to align filterPos if possible
454 for (i=0; i<dstW; i++) {
456 if ((*filterPos)[i] < 0) {
457 // move filter coefficients left to compensate for filterPos
458 for (j=1; j<filterSize; j++) {
459 int left= FFMAX(j + (*filterPos)[i], 0);
460 filter[i*filterSize + left] += filter[i*filterSize + j];
461 filter[i*filterSize + j]=0;
466 if ((*filterPos)[i] + filterSize > srcW) {
467 int shift= (*filterPos)[i] + filterSize - srcW;
468 // move filter coefficients right to compensate for filterPos
469 for (j=filterSize-2; j>=0; j--) {
470 int right= FFMIN(j + shift, filterSize-1);
471 filter[i*filterSize +right] += filter[i*filterSize +j];
472 filter[i*filterSize +j]=0;
474 (*filterPos)[i]= srcW - filterSize;
478 // Note the +1 is for the MMX scaler which reads over the end
479 /* align at 16 for AltiVec (needed by hScale_altivec_real) */
480 FF_ALLOCZ_OR_GOTO(NULL, *outFilter, *outFilterSize*(dstW+1)*sizeof(int16_t), fail);
482 /* normalize & store in outFilter */
483 for (i=0; i<dstW; i++) {
488 for (j=0; j<filterSize; j++) {
489 sum+= filter[i*filterSize + j];
491 sum= (sum + one/2)/ one;
492 for (j=0; j<*outFilterSize; j++) {
493 int64_t v= filter[i*filterSize + j] + error;
494 int intV= ROUNDED_DIV(v, sum);
495 (*outFilter)[i*(*outFilterSize) + j]= intV;
500 (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end
501 for (i=0; i<*outFilterSize; i++) {
502 int j= dstW*(*outFilterSize);
503 (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];
514 static int initMMX2HScaler(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits)
517 x86_reg imm8OfPShufW1A;
518 x86_reg imm8OfPShufW2A;
519 x86_reg fragmentLengthA;
521 x86_reg imm8OfPShufW1B;
522 x86_reg imm8OfPShufW2B;
523 x86_reg fragmentLengthB;
528 // create an optimized horizontal scaling routine
529 /* This scaler is made of runtime-generated MMX2 code using specially
530 * tuned pshufw instructions. For every four output pixels, if four
531 * input pixels are enough for the fast bilinear scaling, then a chunk
532 * of fragmentB is used. If five input pixels are needed, then a chunk
533 * of fragmentA is used.
542 "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t"
543 "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t"
544 "movd 1(%%"REG_c", %%"REG_S"), %%mm1 \n\t"
545 "punpcklbw %%mm7, %%mm1 \n\t"
546 "punpcklbw %%mm7, %%mm0 \n\t"
547 "pshufw $0xFF, %%mm1, %%mm1 \n\t"
549 "pshufw $0xFF, %%mm0, %%mm0 \n\t"
551 "psubw %%mm1, %%mm0 \n\t"
552 "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t"
553 "pmullw %%mm3, %%mm0 \n\t"
554 "psllw $7, %%mm1 \n\t"
555 "paddw %%mm1, %%mm0 \n\t"
557 "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t"
559 "add $8, %%"REG_a" \n\t"
563 "lea " LOCAL_MANGLE(0b) ", %0 \n\t"
564 "lea " LOCAL_MANGLE(1b) ", %1 \n\t"
565 "lea " LOCAL_MANGLE(2b) ", %2 \n\t"
570 "lea " LOCAL_MANGLE(9b) ", %3 \n\t"
574 :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),
575 "=r" (fragmentLengthA)
582 "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t"
583 "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t"
584 "punpcklbw %%mm7, %%mm0 \n\t"
585 "pshufw $0xFF, %%mm0, %%mm1 \n\t"
587 "pshufw $0xFF, %%mm0, %%mm0 \n\t"
589 "psubw %%mm1, %%mm0 \n\t"
590 "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t"
591 "pmullw %%mm3, %%mm0 \n\t"
592 "psllw $7, %%mm1 \n\t"
593 "paddw %%mm1, %%mm0 \n\t"
595 "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t"
597 "add $8, %%"REG_a" \n\t"
601 "lea " LOCAL_MANGLE(0b) ", %0 \n\t"
602 "lea " LOCAL_MANGLE(1b) ", %1 \n\t"
603 "lea " LOCAL_MANGLE(2b) ", %2 \n\t"
608 "lea " LOCAL_MANGLE(9b) ", %3 \n\t"
612 :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),
613 "=r" (fragmentLengthB)
616 xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers
619 for (i=0; i<dstW/numSplits; i++) {
624 int b=((xpos+xInc)>>16) - xx;
625 int c=((xpos+xInc*2)>>16) - xx;
626 int d=((xpos+xInc*3)>>16) - xx;
628 uint8_t *fragment = (d+1<4) ? fragmentB : fragmentA;
629 x86_reg imm8OfPShufW1 = (d+1<4) ? imm8OfPShufW1B : imm8OfPShufW1A;
630 x86_reg imm8OfPShufW2 = (d+1<4) ? imm8OfPShufW2B : imm8OfPShufW2A;
631 x86_reg fragmentLength = (d+1<4) ? fragmentLengthB : fragmentLengthA;
632 int maxShift= 3-(d+inc);
636 filter[i ] = (( xpos & 0xFFFF) ^ 0xFFFF)>>9;
637 filter[i+1] = (((xpos+xInc ) & 0xFFFF) ^ 0xFFFF)>>9;
638 filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;
639 filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;
642 memcpy(filterCode + fragmentPos, fragment, fragmentLength);
644 filterCode[fragmentPos + imm8OfPShufW1]=
645 (a+inc) | ((b+inc)<<2) | ((c+inc)<<4) | ((d+inc)<<6);
646 filterCode[fragmentPos + imm8OfPShufW2]=
647 a | (b<<2) | (c<<4) | (d<<6);
649 if (i+4-inc>=dstW) shift=maxShift; //avoid overread
650 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align
652 if (shift && i>=shift) {
653 filterCode[fragmentPos + imm8OfPShufW1]+= 0x55*shift;
654 filterCode[fragmentPos + imm8OfPShufW2]+= 0x55*shift;
655 filterPos[i/2]-=shift;
659 fragmentPos+= fragmentLength;
662 filterCode[fragmentPos]= RET;
667 filterPos[((i/2)+1)&(~1)]= xpos>>16; // needed to jump to the next part
669 return fragmentPos + 1;
671 #endif /* HAVE_MMX2 */
673 static void getSubSampleFactors(int *h, int *v, enum PixelFormat format)
675 *h = av_pix_fmt_descriptors[format].log2_chroma_w;
676 *v = av_pix_fmt_descriptors[format].log2_chroma_h;
679 int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation)
681 memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);
682 memcpy(c->dstColorspaceTable, table, sizeof(int)*4);
684 c->brightness= brightness;
685 c->contrast = contrast;
686 c->saturation= saturation;
687 c->srcRange = srcRange;
688 c->dstRange = dstRange;
689 if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
691 c->dstFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[c->dstFormat]);
692 c->srcFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[c->srcFormat]);
694 ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);
697 if (HAVE_ALTIVEC && av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC)
698 ff_yuv2rgb_init_tables_altivec(c, inv_table, brightness, contrast, saturation);
702 int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation)
704 if (!c || isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
706 *inv_table = c->srcColorspaceTable;
707 *table = c->dstColorspaceTable;
708 *srcRange = c->srcRange;
709 *dstRange = c->dstRange;
710 *brightness= c->brightness;
711 *contrast = c->contrast;
712 *saturation= c->saturation;
717 static int handle_jpeg(enum PixelFormat *format)
720 case PIX_FMT_YUVJ420P: *format = PIX_FMT_YUV420P; return 1;
721 case PIX_FMT_YUVJ422P: *format = PIX_FMT_YUV422P; return 1;
722 case PIX_FMT_YUVJ444P: *format = PIX_FMT_YUV444P; return 1;
723 case PIX_FMT_YUVJ440P: *format = PIX_FMT_YUV440P; return 1;
728 SwsContext *sws_alloc_context(void)
730 SwsContext *c= av_mallocz(sizeof(SwsContext));
732 c->av_class = &sws_context_class;
733 av_opt_set_defaults(c);
738 int sws_init_context(SwsContext *c, SwsFilter *srcFilter, SwsFilter *dstFilter)
741 int usesVFilter, usesHFilter;
743 SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};
748 int dst_stride = FFALIGN(dstW * sizeof(int16_t)+66, 16), dst_stride_px = dst_stride >> 1;
749 int flags, cpu_flags;
750 enum PixelFormat srcFormat= c->srcFormat;
751 enum PixelFormat dstFormat= c->dstFormat;
753 cpu_flags = av_get_cpu_flags();
756 if (!rgb15to16) sws_rgb2rgb_init();
758 unscaled = (srcW == dstW && srcH == dstH);
760 if (!isSupportedIn(srcFormat)) {
761 av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input pixel format\n", av_get_pix_fmt_name(srcFormat));
762 return AVERROR(EINVAL);
764 if (!isSupportedOut(dstFormat)) {
765 av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output pixel format\n", av_get_pix_fmt_name(dstFormat));
766 return AVERROR(EINVAL);
769 i= flags & ( SWS_POINT
780 if(!i || (i & (i-1))) {
781 av_log(NULL, AV_LOG_ERROR, "swScaler: Exactly one scaler algorithm must be chosen\n");
782 return AVERROR(EINVAL);
785 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
786 av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",
787 srcW, srcH, dstW, dstH);
788 return AVERROR(EINVAL);
791 if (!dstFilter) dstFilter= &dummyFilter;
792 if (!srcFilter) srcFilter= &dummyFilter;
794 c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;
795 c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;
796 c->dstFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[dstFormat]);
797 c->srcFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[srcFormat]);
798 c->vRounder= 4* 0x0001000100010001ULL;
800 usesVFilter = (srcFilter->lumV && srcFilter->lumV->length>1) ||
801 (srcFilter->chrV && srcFilter->chrV->length>1) ||
802 (dstFilter->lumV && dstFilter->lumV->length>1) ||
803 (dstFilter->chrV && dstFilter->chrV->length>1);
804 usesHFilter = (srcFilter->lumH && srcFilter->lumH->length>1) ||
805 (srcFilter->chrH && srcFilter->chrH->length>1) ||
806 (dstFilter->lumH && dstFilter->lumH->length>1) ||
807 (dstFilter->chrH && dstFilter->chrH->length>1);
809 getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);
810 getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);
812 // reuse chroma for 2 pixels RGB/BGR unless user wants full chroma interpolation
813 if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;
815 // drop some chroma lines if the user wants it
816 c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;
817 c->chrSrcVSubSample+= c->vChrDrop;
819 // drop every other pixel for chroma calculation unless user wants full chroma
820 if (isAnyRGB(srcFormat) && !(flags&SWS_FULL_CHR_H_INP)
821 && srcFormat!=PIX_FMT_RGB8 && srcFormat!=PIX_FMT_BGR8
822 && srcFormat!=PIX_FMT_RGB4 && srcFormat!=PIX_FMT_BGR4
823 && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE
824 && ((dstW>>c->chrDstHSubSample) <= (srcW>>1) || (flags&SWS_FAST_BILINEAR)))
825 c->chrSrcHSubSample=1;
827 // Note the -((-x)>>y) is so that we always round toward +inf.
828 c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);
829 c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);
830 c->chrDstW= -((-dstW) >> c->chrDstHSubSample);
831 c->chrDstH= -((-dstH) >> c->chrDstVSubSample);
833 /* unscaled special cases */
834 if (unscaled && !usesHFilter && !usesVFilter && (c->srcRange == c->dstRange || isAnyRGB(dstFormat))) {
835 ff_get_unscaled_swscale(c);
838 if (flags&SWS_PRINT_INFO)
839 av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",
840 av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
845 FF_ALLOC_OR_GOTO(c, c->formatConvBuffer, FFALIGN(srcW*2+78, 16) * 2, fail);
846 if (HAVE_MMX2 && cpu_flags & AV_CPU_FLAG_MMX2) {
847 c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;
848 if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR)) {
849 if (flags&SWS_PRINT_INFO)
850 av_log(c, AV_LOG_INFO, "output width is not a multiple of 32 -> no MMX2 scaler\n");
852 if (usesHFilter || isNBPS(c->srcFormat) || is16BPS(c->srcFormat) || isAnyRGB(c->srcFormat)) c->canMMX2BeUsed=0;
857 c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;
858 c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;
860 // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst
861 // but only for the FAST_BILINEAR mode otherwise do correct scaling
862 // n-2 is the last chrominance sample available
863 // this is not perfect, but no one should notice the difference, the more correct variant
864 // would be like the vertical one, but that would require some special code for the
865 // first and last pixel
866 if (flags&SWS_FAST_BILINEAR) {
867 if (c->canMMX2BeUsed) {
871 //we don't use the x86 asm scaler if MMX is available
872 else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
873 c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;
874 c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;
878 /* precalculate horizontal scaler filter coefficients */
881 // can't downscale !!!
882 if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR)) {
883 c->lumMmx2FilterCodeSize = initMMX2HScaler( dstW, c->lumXInc, NULL, NULL, NULL, 8);
884 c->chrMmx2FilterCodeSize = initMMX2HScaler(c->chrDstW, c->chrXInc, NULL, NULL, NULL, 4);
887 c->lumMmx2FilterCode = mmap(NULL, c->lumMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
888 c->chrMmx2FilterCode = mmap(NULL, c->chrMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
889 #elif HAVE_VIRTUALALLOC
890 c->lumMmx2FilterCode = VirtualAlloc(NULL, c->lumMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
891 c->chrMmx2FilterCode = VirtualAlloc(NULL, c->chrMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
893 c->lumMmx2FilterCode = av_malloc(c->lumMmx2FilterCodeSize);
894 c->chrMmx2FilterCode = av_malloc(c->chrMmx2FilterCodeSize);
898 if (c->lumMmx2FilterCode == MAP_FAILED || c->chrMmx2FilterCode == MAP_FAILED)
900 if (!c->lumMmx2FilterCode || !c->chrMmx2FilterCode)
902 return AVERROR(ENOMEM);
903 FF_ALLOCZ_OR_GOTO(c, c->hLumFilter , (dstW /8+8)*sizeof(int16_t), fail);
904 FF_ALLOCZ_OR_GOTO(c, c->hChrFilter , (c->chrDstW /4+8)*sizeof(int16_t), fail);
905 FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW /2/8+8)*sizeof(int32_t), fail);
906 FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW/2/4+8)*sizeof(int32_t), fail);
908 initMMX2HScaler( dstW, c->lumXInc, c->lumMmx2FilterCode, c->hLumFilter, c->hLumFilterPos, 8);
909 initMMX2HScaler(c->chrDstW, c->chrXInc, c->chrMmx2FilterCode, c->hChrFilter, c->hChrFilterPos, 4);
912 mprotect(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize, PROT_EXEC | PROT_READ);
913 mprotect(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize, PROT_EXEC | PROT_READ);
916 #endif /* HAVE_MMX2 */
918 const int filterAlign=
919 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? 4 :
920 (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) ? 8 :
923 if (initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,
924 srcW , dstW, filterAlign, 1<<14,
925 (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags, cpu_flags,
926 srcFilter->lumH, dstFilter->lumH, c->param) < 0)
928 if (initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,
929 c->chrSrcW, c->chrDstW, filterAlign, 1<<14,
930 (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags, cpu_flags,
931 srcFilter->chrH, dstFilter->chrH, c->param) < 0)
934 } // initialize horizontal stuff
936 /* precalculate vertical scaler filter coefficients */
938 const int filterAlign=
939 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :
940 (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) ? 8 :
943 if (initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,
944 srcH , dstH, filterAlign, (1<<12),
945 (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags, cpu_flags,
946 srcFilter->lumV, dstFilter->lumV, c->param) < 0)
948 if (initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,
949 c->chrSrcH, c->chrDstH, filterAlign, (1<<12),
950 (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags, cpu_flags,
951 srcFilter->chrV, dstFilter->chrV, c->param) < 0)
955 FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof (vector signed short)*c->vLumFilterSize*c->dstH, fail);
956 FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH, fail);
958 for (i=0;i<c->vLumFilterSize*c->dstH;i++) {
960 short *p = (short *)&c->vYCoeffsBank[i];
962 p[j] = c->vLumFilter[i];
965 for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {
967 short *p = (short *)&c->vCCoeffsBank[i];
969 p[j] = c->vChrFilter[i];
974 // calculate buffer sizes so that they won't run out while handling these damn slices
975 c->vLumBufSize= c->vLumFilterSize;
976 c->vChrBufSize= c->vChrFilterSize;
977 for (i=0; i<dstH; i++) {
978 int chrI= (int64_t)i*c->chrDstH / dstH;
979 int nextSlice= FFMAX(c->vLumFilterPos[i ] + c->vLumFilterSize - 1,
980 ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));
982 nextSlice>>= c->chrSrcVSubSample;
983 nextSlice<<= c->chrSrcVSubSample;
984 if (c->vLumFilterPos[i ] + c->vLumBufSize < nextSlice)
985 c->vLumBufSize= nextSlice - c->vLumFilterPos[i];
986 if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))
987 c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];
990 // allocate pixbufs (we use dynamic allocation because otherwise we would need to
991 // allocate several megabytes to handle all possible cases)
992 FF_ALLOC_OR_GOTO(c, c->lumPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);
993 FF_ALLOC_OR_GOTO(c, c->chrUPixBuf, c->vChrBufSize*2*sizeof(int16_t*), fail);
994 FF_ALLOC_OR_GOTO(c, c->chrVPixBuf, c->vChrBufSize*2*sizeof(int16_t*), fail);
995 if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat))
996 FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);
997 //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)
998 /* align at 16 bytes for AltiVec */
999 for (i=0; i<c->vLumBufSize; i++) {
1000 FF_ALLOCZ_OR_GOTO(c, c->lumPixBuf[i+c->vLumBufSize], dst_stride+1, fail);
1001 c->lumPixBuf[i] = c->lumPixBuf[i+c->vLumBufSize];
1003 c->uv_off = dst_stride_px;
1004 c->uv_offx2 = dst_stride;
1005 for (i=0; i<c->vChrBufSize; i++) {
1006 FF_ALLOC_OR_GOTO(c, c->chrUPixBuf[i+c->vChrBufSize], dst_stride*2+1, fail);
1007 c->chrUPixBuf[i] = c->chrUPixBuf[i+c->vChrBufSize];
1008 c->chrVPixBuf[i] = c->chrVPixBuf[i+c->vChrBufSize] = c->chrUPixBuf[i] + dst_stride_px;
1010 if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf)
1011 for (i=0; i<c->vLumBufSize; i++) {
1012 FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf[i+c->vLumBufSize], dst_stride+1, fail);
1013 c->alpPixBuf[i] = c->alpPixBuf[i+c->vLumBufSize];
1016 //try to avoid drawing green stuff between the right end and the stride end
1017 for (i=0; i<c->vChrBufSize; i++)
1018 memset(c->chrUPixBuf[i], 64, dst_stride*2+1);
1020 assert(c->chrDstH <= dstH);
1022 if (flags&SWS_PRINT_INFO) {
1023 if (flags&SWS_FAST_BILINEAR) av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");
1024 else if (flags&SWS_BILINEAR) av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");
1025 else if (flags&SWS_BICUBIC) av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");
1026 else if (flags&SWS_X) av_log(c, AV_LOG_INFO, "Experimental scaler, ");
1027 else if (flags&SWS_POINT) av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");
1028 else if (flags&SWS_AREA) av_log(c, AV_LOG_INFO, "Area Averaging scaler, ");
1029 else if (flags&SWS_BICUBLIN) av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");
1030 else if (flags&SWS_GAUSS) av_log(c, AV_LOG_INFO, "Gaussian scaler, ");
1031 else if (flags&SWS_SINC) av_log(c, AV_LOG_INFO, "Sinc scaler, ");
1032 else if (flags&SWS_LANCZOS) av_log(c, AV_LOG_INFO, "Lanczos scaler, ");
1033 else if (flags&SWS_SPLINE) av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");
1034 else av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");
1036 av_log(c, AV_LOG_INFO, "from %s to %s%s ",
1037 av_get_pix_fmt_name(srcFormat),
1039 dstFormat == PIX_FMT_BGR555 || dstFormat == PIX_FMT_BGR565 ||
1040 dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE ||
1041 dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE ? "dithered " : "",
1045 av_get_pix_fmt_name(dstFormat));
1047 if (HAVE_MMX2 && cpu_flags & AV_CPU_FLAG_MMX2) av_log(c, AV_LOG_INFO, "using MMX2\n");
1048 else if (HAVE_AMD3DNOW && cpu_flags & AV_CPU_FLAG_3DNOW) av_log(c, AV_LOG_INFO, "using 3DNOW\n");
1049 else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) av_log(c, AV_LOG_INFO, "using MMX\n");
1050 else if (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) av_log(c, AV_LOG_INFO, "using AltiVec\n");
1051 else av_log(c, AV_LOG_INFO, "using C\n");
1053 if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
1054 if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))
1055 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");
1057 if (c->hLumFilterSize==4)
1058 av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal luminance scaling\n");
1059 else if (c->hLumFilterSize==8)
1060 av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal luminance scaling\n");
1062 av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal luminance scaling\n");
1064 if (c->hChrFilterSize==4)
1065 av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal chrominance scaling\n");
1066 else if (c->hChrFilterSize==8)
1067 av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal chrominance scaling\n");
1069 av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal chrominance scaling\n");
1073 av_log(c, AV_LOG_VERBOSE, "using x86 asm scaler for horizontal scaling\n");
1075 if (flags & SWS_FAST_BILINEAR)
1076 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR C scaler for horizontal scaling\n");
1078 av_log(c, AV_LOG_VERBOSE, "using C scaler for horizontal scaling\n");
1081 if (isPlanarYUV(dstFormat)) {
1082 if (c->vLumFilterSize==1)
1083 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n",
1084 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1086 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (YV12 like)\n",
1087 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1089 if (c->vLumFilterSize==1 && c->vChrFilterSize==2)
1090 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"
1091 " 2-tap scaler for vertical chrominance scaling (BGR)\n",
1092 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1093 else if (c->vLumFilterSize==2 && c->vChrFilterSize==2)
1094 av_log(c, AV_LOG_VERBOSE, "using 2-tap linear %s scaler for vertical scaling (BGR)\n",
1095 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1097 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (BGR)\n",
1098 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1101 if (dstFormat==PIX_FMT_BGR24)
1102 av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR24 converter\n",
1103 (HAVE_MMX2 && cpu_flags & AV_CPU_FLAG_MMX2) ? "MMX2" :
1104 ((HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C"));
1105 else if (dstFormat==PIX_FMT_RGB32)
1106 av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR32 converter\n",
1107 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1108 else if (dstFormat==PIX_FMT_BGR565)
1109 av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 converter\n",
1110 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1111 else if (dstFormat==PIX_FMT_BGR555)
1112 av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 converter\n",
1113 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1114 else if (dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE ||
1115 dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE)
1116 av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR12 converter\n",
1117 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? "MMX" : "C");
1119 av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
1120 av_log(c, AV_LOG_DEBUG, "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1121 c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
1122 av_log(c, AV_LOG_DEBUG, "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1123 c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);
1126 c->swScale= ff_getSwsFunc(c);
1128 fail: //FIXME replace things by appropriate error codes
1132 #if FF_API_SWS_GETCONTEXT
1133 SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
1134 int dstW, int dstH, enum PixelFormat dstFormat, int flags,
1135 SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
1139 if(!(c=sws_alloc_context()))
1147 c->srcRange = handle_jpeg(&srcFormat);
1148 c->dstRange = handle_jpeg(&dstFormat);
1149 c->srcFormat= srcFormat;
1150 c->dstFormat= dstFormat;
1153 c->param[0] = param[0];
1154 c->param[1] = param[1];
1156 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);
1158 if(sws_init_context(c, srcFilter, dstFilter) < 0){
1167 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
1168 float lumaSharpen, float chromaSharpen,
1169 float chromaHShift, float chromaVShift,
1172 SwsFilter *filter= av_malloc(sizeof(SwsFilter));
1176 if (lumaGBlur!=0.0) {
1177 filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);
1178 filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);
1180 filter->lumH= sws_getIdentityVec();
1181 filter->lumV= sws_getIdentityVec();
1184 if (chromaGBlur!=0.0) {
1185 filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);
1186 filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);
1188 filter->chrH= sws_getIdentityVec();
1189 filter->chrV= sws_getIdentityVec();
1192 if (chromaSharpen!=0.0) {
1193 SwsVector *id= sws_getIdentityVec();
1194 sws_scaleVec(filter->chrH, -chromaSharpen);
1195 sws_scaleVec(filter->chrV, -chromaSharpen);
1196 sws_addVec(filter->chrH, id);
1197 sws_addVec(filter->chrV, id);
1201 if (lumaSharpen!=0.0) {
1202 SwsVector *id= sws_getIdentityVec();
1203 sws_scaleVec(filter->lumH, -lumaSharpen);
1204 sws_scaleVec(filter->lumV, -lumaSharpen);
1205 sws_addVec(filter->lumH, id);
1206 sws_addVec(filter->lumV, id);
1210 if (chromaHShift != 0.0)
1211 sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));
1213 if (chromaVShift != 0.0)
1214 sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));
1216 sws_normalizeVec(filter->chrH, 1.0);
1217 sws_normalizeVec(filter->chrV, 1.0);
1218 sws_normalizeVec(filter->lumH, 1.0);
1219 sws_normalizeVec(filter->lumV, 1.0);
1221 if (verbose) sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);
1222 if (verbose) sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);
1227 SwsVector *sws_allocVec(int length)
1229 SwsVector *vec = av_malloc(sizeof(SwsVector));
1232 vec->length = length;
1233 vec->coeff = av_malloc(sizeof(double) * length);
1239 SwsVector *sws_getGaussianVec(double variance, double quality)
1241 const int length= (int)(variance*quality + 0.5) | 1;
1243 double middle= (length-1)*0.5;
1244 SwsVector *vec= sws_allocVec(length);
1249 for (i=0; i<length; i++) {
1250 double dist= i-middle;
1251 vec->coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*M_PI);
1254 sws_normalizeVec(vec, 1.0);
1259 SwsVector *sws_getConstVec(double c, int length)
1262 SwsVector *vec= sws_allocVec(length);
1267 for (i=0; i<length; i++)
1273 SwsVector *sws_getIdentityVec(void)
1275 return sws_getConstVec(1.0, 1);
1278 static double sws_dcVec(SwsVector *a)
1283 for (i=0; i<a->length; i++)
1289 void sws_scaleVec(SwsVector *a, double scalar)
1293 for (i=0; i<a->length; i++)
1294 a->coeff[i]*= scalar;
1297 void sws_normalizeVec(SwsVector *a, double height)
1299 sws_scaleVec(a, height/sws_dcVec(a));
1302 static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b)
1304 int length= a->length + b->length - 1;
1306 SwsVector *vec= sws_getConstVec(0.0, length);
1311 for (i=0; i<a->length; i++) {
1312 for (j=0; j<b->length; j++) {
1313 vec->coeff[i+j]+= a->coeff[i]*b->coeff[j];
1320 static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b)
1322 int length= FFMAX(a->length, b->length);
1324 SwsVector *vec= sws_getConstVec(0.0, length);
1329 for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
1330 for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];
1335 static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b)
1337 int length= FFMAX(a->length, b->length);
1339 SwsVector *vec= sws_getConstVec(0.0, length);
1344 for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
1345 for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];
1350 /* shift left / or right if "shift" is negative */
1351 static SwsVector *sws_getShiftedVec(SwsVector *a, int shift)
1353 int length= a->length + FFABS(shift)*2;
1355 SwsVector *vec= sws_getConstVec(0.0, length);
1360 for (i=0; i<a->length; i++) {
1361 vec->coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];
1367 void sws_shiftVec(SwsVector *a, int shift)
1369 SwsVector *shifted= sws_getShiftedVec(a, shift);
1371 a->coeff= shifted->coeff;
1372 a->length= shifted->length;
1376 void sws_addVec(SwsVector *a, SwsVector *b)
1378 SwsVector *sum= sws_sumVec(a, b);
1380 a->coeff= sum->coeff;
1381 a->length= sum->length;
1385 void sws_subVec(SwsVector *a, SwsVector *b)
1387 SwsVector *diff= sws_diffVec(a, b);
1389 a->coeff= diff->coeff;
1390 a->length= diff->length;
1394 void sws_convVec(SwsVector *a, SwsVector *b)
1396 SwsVector *conv= sws_getConvVec(a, b);
1398 a->coeff= conv->coeff;
1399 a->length= conv->length;
1403 SwsVector *sws_cloneVec(SwsVector *a)
1406 SwsVector *vec= sws_allocVec(a->length);
1411 for (i=0; i<a->length; i++) vec->coeff[i]= a->coeff[i];
1416 void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)
1423 for (i=0; i<a->length; i++)
1424 if (a->coeff[i]>max) max= a->coeff[i];
1426 for (i=0; i<a->length; i++)
1427 if (a->coeff[i]<min) min= a->coeff[i];
1431 for (i=0; i<a->length; i++) {
1432 int x= (int)((a->coeff[i]-min)*60.0/range +0.5);
1433 av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);
1434 for (;x>0; x--) av_log(log_ctx, log_level, " ");
1435 av_log(log_ctx, log_level, "|\n");
1439 #if LIBSWSCALE_VERSION_MAJOR < 1
1440 void sws_printVec(SwsVector *a)
1442 sws_printVec2(a, NULL, AV_LOG_DEBUG);
1446 void sws_freeVec(SwsVector *a)
1449 av_freep(&a->coeff);
1454 void sws_freeFilter(SwsFilter *filter)
1456 if (!filter) return;
1458 if (filter->lumH) sws_freeVec(filter->lumH);
1459 if (filter->lumV) sws_freeVec(filter->lumV);
1460 if (filter->chrH) sws_freeVec(filter->chrH);
1461 if (filter->chrV) sws_freeVec(filter->chrV);
1465 void sws_freeContext(SwsContext *c)
1471 for (i=0; i<c->vLumBufSize; i++)
1472 av_freep(&c->lumPixBuf[i]);
1473 av_freep(&c->lumPixBuf);
1476 if (c->chrUPixBuf) {
1477 for (i=0; i<c->vChrBufSize; i++)
1478 av_freep(&c->chrUPixBuf[i]);
1479 av_freep(&c->chrUPixBuf);
1480 av_freep(&c->chrVPixBuf);
1483 if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {
1484 for (i=0; i<c->vLumBufSize; i++)
1485 av_freep(&c->alpPixBuf[i]);
1486 av_freep(&c->alpPixBuf);
1489 av_freep(&c->vLumFilter);
1490 av_freep(&c->vChrFilter);
1491 av_freep(&c->hLumFilter);
1492 av_freep(&c->hChrFilter);
1494 av_freep(&c->vYCoeffsBank);
1495 av_freep(&c->vCCoeffsBank);
1498 av_freep(&c->vLumFilterPos);
1499 av_freep(&c->vChrFilterPos);
1500 av_freep(&c->hLumFilterPos);
1501 av_freep(&c->hChrFilterPos);
1504 #ifdef MAP_ANONYMOUS
1505 if (c->lumMmx2FilterCode) munmap(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize);
1506 if (c->chrMmx2FilterCode) munmap(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize);
1507 #elif HAVE_VIRTUALALLOC
1508 if (c->lumMmx2FilterCode) VirtualFree(c->lumMmx2FilterCode, 0, MEM_RELEASE);
1509 if (c->chrMmx2FilterCode) VirtualFree(c->chrMmx2FilterCode, 0, MEM_RELEASE);
1511 av_free(c->lumMmx2FilterCode);
1512 av_free(c->chrMmx2FilterCode);
1514 c->lumMmx2FilterCode=NULL;
1515 c->chrMmx2FilterCode=NULL;
1516 #endif /* HAVE_MMX */
1518 av_freep(&c->yuvTable);
1519 av_freep(&c->formatConvBuffer);
1524 struct SwsContext *sws_getCachedContext(struct SwsContext *context,
1525 int srcW, int srcH, enum PixelFormat srcFormat,
1526 int dstW, int dstH, enum PixelFormat dstFormat, int flags,
1527 SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
1529 static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};
1532 param = default_param;
1535 (context->srcW != srcW ||
1536 context->srcH != srcH ||
1537 context->srcFormat != srcFormat ||
1538 context->dstW != dstW ||
1539 context->dstH != dstH ||
1540 context->dstFormat != dstFormat ||
1541 context->flags != flags ||
1542 context->param[0] != param[0] ||
1543 context->param[1] != param[1])) {
1544 sws_freeContext(context);
1549 if (!(context = sws_alloc_context()))
1551 context->srcW = srcW;
1552 context->srcH = srcH;
1553 context->srcRange = handle_jpeg(&srcFormat);
1554 context->srcFormat = srcFormat;
1555 context->dstW = dstW;
1556 context->dstH = dstH;
1557 context->dstRange = handle_jpeg(&dstFormat);
1558 context->dstFormat = dstFormat;
1559 context->flags = flags;
1560 context->param[0] = param[0];
1561 context->param[1] = param[1];
1562 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);
1563 if (sws_init_context(context, srcFilter, dstFilter) < 0) {
1564 sws_freeContext(context);