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/mathematics.h"
48 #include "libavutil/opt.h"
49 #include "libavutil/pixdesc.h"
50 #include "libavutil/avassert.h"
52 unsigned swscale_version(void)
54 av_assert0(LIBSWSCALE_VERSION_MICRO >= 100);
55 return LIBSWSCALE_VERSION_INT;
58 const char *swscale_configuration(void)
60 return FFMPEG_CONFIGURATION;
63 const char *swscale_license(void)
65 #define LICENSE_PREFIX "libswscale license: "
66 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
69 #define RET 0xC3 //near return opcode for x86
71 typedef struct FormatEntry {
72 int is_supported_in, is_supported_out;
75 static const FormatEntry format_entries[PIX_FMT_NB] = {
76 [PIX_FMT_YUV420P] = { 1 , 1 },
77 [PIX_FMT_YUYV422] = { 1 , 1 },
78 [PIX_FMT_RGB24] = { 1 , 1 },
79 [PIX_FMT_BGR24] = { 1 , 1 },
80 [PIX_FMT_YUV422P] = { 1 , 1 },
81 [PIX_FMT_YUV444P] = { 1 , 1 },
82 [PIX_FMT_YUV410P] = { 1 , 1 },
83 [PIX_FMT_YUV411P] = { 1 , 1 },
84 [PIX_FMT_GRAY8] = { 1 , 1 },
85 [PIX_FMT_MONOWHITE] = { 1 , 1 },
86 [PIX_FMT_MONOBLACK] = { 1 , 1 },
87 [PIX_FMT_PAL8] = { 1 , 0 },
88 [PIX_FMT_YUVJ420P] = { 1 , 1 },
89 [PIX_FMT_YUVJ422P] = { 1 , 1 },
90 [PIX_FMT_YUVJ444P] = { 1 , 1 },
91 [PIX_FMT_UYVY422] = { 1 , 1 },
92 [PIX_FMT_UYYVYY411] = { 0 , 0 },
93 [PIX_FMT_BGR8] = { 1 , 1 },
94 [PIX_FMT_BGR4] = { 0 , 1 },
95 [PIX_FMT_BGR4_BYTE] = { 1 , 1 },
96 [PIX_FMT_RGB8] = { 1 , 1 },
97 [PIX_FMT_RGB4] = { 0 , 1 },
98 [PIX_FMT_RGB4_BYTE] = { 1 , 1 },
99 [PIX_FMT_NV12] = { 1 , 1 },
100 [PIX_FMT_NV21] = { 1 , 1 },
101 [PIX_FMT_ARGB] = { 1 , 1 },
102 [PIX_FMT_RGBA] = { 1 , 1 },
103 [PIX_FMT_ABGR] = { 1 , 1 },
104 [PIX_FMT_BGRA] = { 1 , 1 },
105 [PIX_FMT_0RGB] = { 1 , 1 },
106 [PIX_FMT_RGB0] = { 1 , 1 },
107 [PIX_FMT_0BGR] = { 1 , 1 },
108 [PIX_FMT_BGR0] = { 1 , 1 },
109 [PIX_FMT_GRAY16BE] = { 1 , 1 },
110 [PIX_FMT_GRAY16LE] = { 1 , 1 },
111 [PIX_FMT_YUV440P] = { 1 , 1 },
112 [PIX_FMT_YUVJ440P] = { 1 , 1 },
113 [PIX_FMT_YUVA420P] = { 1 , 1 },
114 [PIX_FMT_YUVA444P] = { 1 , 1 },
115 [PIX_FMT_RGB48BE] = { 1 , 1 },
116 [PIX_FMT_RGB48LE] = { 1 , 1 },
117 [PIX_FMT_RGBA64BE] = { 0 , 0 },
118 [PIX_FMT_RGBA64LE] = { 0 , 0 },
119 [PIX_FMT_RGB565BE] = { 1 , 1 },
120 [PIX_FMT_RGB565LE] = { 1 , 1 },
121 [PIX_FMT_RGB555BE] = { 1 , 1 },
122 [PIX_FMT_RGB555LE] = { 1 , 1 },
123 [PIX_FMT_BGR565BE] = { 1 , 1 },
124 [PIX_FMT_BGR565LE] = { 1 , 1 },
125 [PIX_FMT_BGR555BE] = { 1 , 1 },
126 [PIX_FMT_BGR555LE] = { 1 , 1 },
127 [PIX_FMT_YUV420P16LE] = { 1 , 1 },
128 [PIX_FMT_YUV420P16BE] = { 1 , 1 },
129 [PIX_FMT_YUV422P16LE] = { 1 , 1 },
130 [PIX_FMT_YUV422P16BE] = { 1 , 1 },
131 [PIX_FMT_YUV444P16LE] = { 1 , 1 },
132 [PIX_FMT_YUV444P16BE] = { 1 , 1 },
133 [PIX_FMT_RGB444LE] = { 1 , 1 },
134 [PIX_FMT_RGB444BE] = { 1 , 1 },
135 [PIX_FMT_BGR444LE] = { 1 , 1 },
136 [PIX_FMT_BGR444BE] = { 1 , 1 },
137 [PIX_FMT_Y400A] = { 1 , 0 },
138 [PIX_FMT_BGR48BE] = { 1 , 1 },
139 [PIX_FMT_BGR48LE] = { 1 , 1 },
140 [PIX_FMT_BGRA64BE] = { 0 , 0 },
141 [PIX_FMT_BGRA64LE] = { 0 , 0 },
142 [PIX_FMT_YUV420P9BE] = { 1 , 1 },
143 [PIX_FMT_YUV420P9LE] = { 1 , 1 },
144 [PIX_FMT_YUV420P10BE] = { 1 , 1 },
145 [PIX_FMT_YUV420P10LE] = { 1 , 1 },
146 [PIX_FMT_YUV422P9BE] = { 1 , 1 },
147 [PIX_FMT_YUV422P9LE] = { 1 , 1 },
148 [PIX_FMT_YUV422P10BE] = { 1 , 1 },
149 [PIX_FMT_YUV422P10LE] = { 1 , 1 },
150 [PIX_FMT_YUV444P9BE] = { 1 , 1 },
151 [PIX_FMT_YUV444P9LE] = { 1 , 1 },
152 [PIX_FMT_YUV444P10BE] = { 1 , 1 },
153 [PIX_FMT_YUV444P10LE] = { 1 , 1 },
154 [PIX_FMT_GBR24P] = { 1 , 0 },
155 [PIX_FMT_GBRP] = { 1 , 0 },
156 [PIX_FMT_GBRP9LE] = { 1 , 0 },
157 [PIX_FMT_GBRP9BE] = { 1 , 0 },
158 [PIX_FMT_GBRP10LE] = { 1 , 0 },
159 [PIX_FMT_GBRP10BE] = { 1 , 0 },
160 [PIX_FMT_GBRP16LE] = { 1 , 0 },
161 [PIX_FMT_GBRP16BE] = { 1 , 0 },
164 int sws_isSupportedInput(enum PixelFormat pix_fmt)
166 return (unsigned)pix_fmt < PIX_FMT_NB ?
167 format_entries[pix_fmt].is_supported_in : 0;
170 int sws_isSupportedOutput(enum PixelFormat pix_fmt)
172 return (unsigned)pix_fmt < PIX_FMT_NB ?
173 format_entries[pix_fmt].is_supported_out : 0;
176 extern const int32_t ff_yuv2rgb_coeffs[8][4];
178 #if FF_API_SWS_FORMAT_NAME
179 const char *sws_format_name(enum PixelFormat format)
181 return av_get_pix_fmt_name(format);
185 static double getSplineCoeff(double a, double b, double c, double d, double dist)
187 if (dist<=1.0) return ((d*dist + c)*dist + b)*dist +a;
188 else return getSplineCoeff( 0.0,
195 static int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,
196 int srcW, int dstW, int filterAlign, int one, int flags, int cpu_flags,
197 SwsVector *srcFilter, SwsVector *dstFilter, double param[2])
203 int64_t *filter=NULL;
204 int64_t *filter2=NULL;
205 const int64_t fone= 1LL<<54;
208 emms_c(); //FIXME this should not be required but it IS (even for non-MMX versions)
210 // NOTE: the +3 is for the MMX(+1)/SSE(+3) scaler which reads over the end
211 FF_ALLOC_OR_GOTO(NULL, *filterPos, (dstW+3)*sizeof(int16_t), fail);
213 if (FFABS(xInc - 0x10000) <10) { // unscaled
216 FF_ALLOCZ_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
218 for (i=0; i<dstW; i++) {
219 filter[i*filterSize]= fone;
223 } else if (flags&SWS_POINT) { // lame looking point sampling mode
227 FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
229 xDstInSrc= xInc/2 - 0x8000;
230 for (i=0; i<dstW; i++) {
231 int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
237 } else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) { // bilinear upscale
241 FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
243 xDstInSrc= xInc/2 - 0x8000;
244 for (i=0; i<dstW; i++) {
245 int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
249 //bilinear upscale / linear interpolate / area averaging
250 for (j=0; j<filterSize; j++) {
251 int64_t coeff= fone - FFABS(((int64_t)xx<<16) - xDstInSrc)*(fone>>16);
252 if (coeff<0) coeff=0;
253 filter[i*filterSize + j]= coeff;
262 if (flags&SWS_BICUBIC) sizeFactor= 4;
263 else if (flags&SWS_X) sizeFactor= 8;
264 else if (flags&SWS_AREA) sizeFactor= 1; //downscale only, for upscale it is bilinear
265 else if (flags&SWS_GAUSS) sizeFactor= 8; // infinite ;)
266 else if (flags&SWS_LANCZOS) sizeFactor= param[0] != SWS_PARAM_DEFAULT ? ceil(2*param[0]) : 6;
267 else if (flags&SWS_SINC) sizeFactor= 20; // infinite ;)
268 else if (flags&SWS_SPLINE) sizeFactor= 20; // infinite ;)
269 else if (flags&SWS_BILINEAR) sizeFactor= 2;
271 sizeFactor= 0; //GCC warning killer
275 if (xInc <= 1<<16) filterSize= 1 + sizeFactor; // upscale
276 else filterSize= 1 + (sizeFactor*srcW + dstW - 1)/ dstW;
278 filterSize = av_clip(filterSize, 1, srcW - 2);
280 FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
282 xDstInSrc= xInc - 0x10000;
283 for (i=0; i<dstW; i++) {
284 int xx= (xDstInSrc - ((filterSize-2)<<16)) / (1<<17);
287 for (j=0; j<filterSize; j++) {
288 int64_t d= (FFABS(((int64_t)xx<<17) - xDstInSrc))<<13;
294 floatd= d * (1.0/(1<<30));
296 if (flags & SWS_BICUBIC) {
297 int64_t B= (param[0] != SWS_PARAM_DEFAULT ? param[0] : 0) * (1<<24);
298 int64_t C= (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1<<24);
303 int64_t dd = (d * d) >> 30;
304 int64_t ddd = (dd * d) >> 30;
307 coeff = (12*(1<<24)-9*B-6*C)*ddd + (-18*(1<<24)+12*B+6*C)*dd + (6*(1<<24)-2*B)*(1<<30);
309 coeff = (-B-6*C)*ddd + (6*B+30*C)*dd + (-12*B-48*C)*d + (8*B+24*C)*(1<<30);
311 coeff *= fone>>(30+24);
313 /* else if (flags & SWS_X) {
314 double p= param ? param*0.01 : 0.3;
315 coeff = d ? sin(d*M_PI)/(d*M_PI) : 1.0;
316 coeff*= pow(2.0, - p*d*d);
318 else if (flags & SWS_X) {
319 double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
323 c = cos(floatd*M_PI);
326 if (c<0.0) c= -pow(-c, A);
328 coeff= (c*0.5 + 0.5)*fone;
329 } else if (flags & SWS_AREA) {
330 int64_t d2= d - (1<<29);
331 if (d2*xInc < -(1LL<<(29+16))) coeff= 1.0 * (1LL<<(30+16));
332 else if (d2*xInc < (1LL<<(29+16))) coeff= -d2*xInc + (1LL<<(29+16));
334 coeff *= fone>>(30+16);
335 } else if (flags & SWS_GAUSS) {
336 double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
337 coeff = (pow(2.0, - p*floatd*floatd))*fone;
338 } else if (flags & SWS_SINC) {
339 coeff = (d ? sin(floatd*M_PI)/(floatd*M_PI) : 1.0)*fone;
340 } else if (flags & SWS_LANCZOS) {
341 double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
342 coeff = (d ? sin(floatd*M_PI)*sin(floatd*M_PI/p)/(floatd*floatd*M_PI*M_PI/p) : 1.0)*fone;
343 if (floatd>p) coeff=0;
344 } else if (flags & SWS_BILINEAR) {
346 if (coeff<0) coeff=0;
348 } else if (flags & SWS_SPLINE) {
349 double p=-2.196152422706632;
350 coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, floatd) * fone;
352 coeff= 0.0; //GCC warning killer
356 filter[i*filterSize + j]= coeff;
363 /* apply src & dst Filter to filter -> filter2
366 assert(filterSize>0);
367 filter2Size= filterSize;
368 if (srcFilter) filter2Size+= srcFilter->length - 1;
369 if (dstFilter) filter2Size+= dstFilter->length - 1;
370 assert(filter2Size>0);
371 FF_ALLOCZ_OR_GOTO(NULL, filter2, filter2Size*dstW*sizeof(*filter2), fail);
373 for (i=0; i<dstW; i++) {
377 for (k=0; k<srcFilter->length; k++) {
378 for (j=0; j<filterSize; j++)
379 filter2[i*filter2Size + k + j] += srcFilter->coeff[k]*filter[i*filterSize + j];
382 for (j=0; j<filterSize; j++)
383 filter2[i*filter2Size + j]= filter[i*filterSize + j];
387 (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;
391 /* try to reduce the filter-size (step1 find size and shift left) */
392 // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).
394 for (i=dstW-1; i>=0; i--) {
395 int min= filter2Size;
399 /* get rid of near zero elements on the left by shifting left */
400 for (j=0; j<filter2Size; j++) {
402 cutOff += FFABS(filter2[i*filter2Size]);
404 if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;
406 /* preserve monotonicity because the core can't handle the filter otherwise */
407 if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;
409 // move filter coefficients left
410 for (k=1; k<filter2Size; k++)
411 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];
412 filter2[i*filter2Size + k - 1]= 0;
417 /* count near zeros on the right */
418 for (j=filter2Size-1; j>0; j--) {
419 cutOff += FFABS(filter2[i*filter2Size + j]);
421 if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;
425 if (min>minFilterSize) minFilterSize= min;
428 if (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) {
429 // we can handle the special case 4,
430 // so we don't want to go to the full 8
431 if (minFilterSize < 5)
434 // We really don't want to waste our time
435 // doing useless computation, so fall back on
436 // the scalar C code for very small filters.
437 // Vectorizing is worth it only if you have a
438 // decent-sized vector.
439 if (minFilterSize < 3)
443 if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
444 // special case for unscaled vertical filtering
445 if (minFilterSize == 1 && filterAlign == 2)
449 assert(minFilterSize > 0);
450 filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));
451 assert(filterSize > 0);
452 filter= av_malloc(filterSize*dstW*sizeof(*filter));
453 if (filterSize >= MAX_FILTER_SIZE*16/((flags&SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter)
455 *outFilterSize= filterSize;
457 if (flags&SWS_PRINT_INFO)
458 av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);
459 /* try to reduce the filter-size (step2 reduce it) */
460 for (i=0; i<dstW; i++) {
463 for (j=0; j<filterSize; j++) {
464 if (j>=filter2Size) filter[i*filterSize + j]= 0;
465 else filter[i*filterSize + j]= filter2[i*filter2Size + j];
466 if((flags & SWS_BITEXACT) && j>=minFilterSize)
467 filter[i*filterSize + j]= 0;
471 //FIXME try to align filterPos if possible
474 for (i=0; i<dstW; i++) {
476 if ((*filterPos)[i] < 0) {
477 // move filter coefficients left to compensate for filterPos
478 for (j=1; j<filterSize; j++) {
479 int left= FFMAX(j + (*filterPos)[i], 0);
480 filter[i*filterSize + left] += filter[i*filterSize + j];
481 filter[i*filterSize + j]=0;
486 if ((*filterPos)[i] + filterSize > srcW) {
487 int shift= (*filterPos)[i] + filterSize - srcW;
488 // move filter coefficients right to compensate for filterPos
489 for (j=filterSize-2; j>=0; j--) {
490 int right= FFMIN(j + shift, filterSize-1);
491 filter[i*filterSize +right] += filter[i*filterSize +j];
492 filter[i*filterSize +j]=0;
494 (*filterPos)[i]= srcW - filterSize;
498 // Note the +1 is for the MMX scaler which reads over the end
499 /* align at 16 for AltiVec (needed by hScale_altivec_real) */
500 FF_ALLOCZ_OR_GOTO(NULL, *outFilter, *outFilterSize*(dstW+3)*sizeof(int16_t), fail);
502 /* normalize & store in outFilter */
503 for (i=0; i<dstW; i++) {
508 for (j=0; j<filterSize; j++) {
509 sum+= filter[i*filterSize + j];
511 sum= (sum + one/2)/ one;
512 for (j=0; j<*outFilterSize; j++) {
513 int64_t v= filter[i*filterSize + j] + error;
514 int intV= ROUNDED_DIV(v, sum);
515 (*outFilter)[i*(*outFilterSize) + j]= intV;
520 (*filterPos)[dstW+0] =
521 (*filterPos)[dstW+1] =
522 (*filterPos)[dstW+2] = (*filterPos)[dstW-1]; // the MMX/SSE scaler will read over the end
523 for (i=0; i<*outFilterSize; i++) {
524 int k= (dstW - 1) * (*outFilterSize) + i;
525 (*outFilter)[k + 1 * (*outFilterSize)] =
526 (*outFilter)[k + 2 * (*outFilterSize)] =
527 (*outFilter)[k + 3 * (*outFilterSize)] = (*outFilter)[k];
538 static int initMMX2HScaler(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits)
541 x86_reg imm8OfPShufW1A;
542 x86_reg imm8OfPShufW2A;
543 x86_reg fragmentLengthA;
545 x86_reg imm8OfPShufW1B;
546 x86_reg imm8OfPShufW2B;
547 x86_reg fragmentLengthB;
552 // create an optimized horizontal scaling routine
553 /* This scaler is made of runtime-generated MMX2 code using specially
554 * tuned pshufw instructions. For every four output pixels, if four
555 * input pixels are enough for the fast bilinear scaling, then a chunk
556 * of fragmentB is used. If five input pixels are needed, then a chunk
557 * of fragmentA is used.
566 "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t"
567 "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t"
568 "movd 1(%%"REG_c", %%"REG_S"), %%mm1 \n\t"
569 "punpcklbw %%mm7, %%mm1 \n\t"
570 "punpcklbw %%mm7, %%mm0 \n\t"
571 "pshufw $0xFF, %%mm1, %%mm1 \n\t"
573 "pshufw $0xFF, %%mm0, %%mm0 \n\t"
575 "psubw %%mm1, %%mm0 \n\t"
576 "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t"
577 "pmullw %%mm3, %%mm0 \n\t"
578 "psllw $7, %%mm1 \n\t"
579 "paddw %%mm1, %%mm0 \n\t"
581 "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t"
583 "add $8, %%"REG_a" \n\t"
587 "lea " LOCAL_MANGLE(0b) ", %0 \n\t"
588 "lea " LOCAL_MANGLE(1b) ", %1 \n\t"
589 "lea " LOCAL_MANGLE(2b) ", %2 \n\t"
594 "lea " LOCAL_MANGLE(9b) ", %3 \n\t"
598 :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),
599 "=r" (fragmentLengthA)
606 "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t"
607 "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t"
608 "punpcklbw %%mm7, %%mm0 \n\t"
609 "pshufw $0xFF, %%mm0, %%mm1 \n\t"
611 "pshufw $0xFF, %%mm0, %%mm0 \n\t"
613 "psubw %%mm1, %%mm0 \n\t"
614 "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t"
615 "pmullw %%mm3, %%mm0 \n\t"
616 "psllw $7, %%mm1 \n\t"
617 "paddw %%mm1, %%mm0 \n\t"
619 "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t"
621 "add $8, %%"REG_a" \n\t"
625 "lea " LOCAL_MANGLE(0b) ", %0 \n\t"
626 "lea " LOCAL_MANGLE(1b) ", %1 \n\t"
627 "lea " LOCAL_MANGLE(2b) ", %2 \n\t"
632 "lea " LOCAL_MANGLE(9b) ", %3 \n\t"
636 :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),
637 "=r" (fragmentLengthB)
640 xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers
643 for (i=0; i<dstW/numSplits; i++) {
648 int b=((xpos+xInc)>>16) - xx;
649 int c=((xpos+xInc*2)>>16) - xx;
650 int d=((xpos+xInc*3)>>16) - xx;
652 uint8_t *fragment = (d+1<4) ? fragmentB : fragmentA;
653 x86_reg imm8OfPShufW1 = (d+1<4) ? imm8OfPShufW1B : imm8OfPShufW1A;
654 x86_reg imm8OfPShufW2 = (d+1<4) ? imm8OfPShufW2B : imm8OfPShufW2A;
655 x86_reg fragmentLength = (d+1<4) ? fragmentLengthB : fragmentLengthA;
656 int maxShift= 3-(d+inc);
660 filter[i ] = (( xpos & 0xFFFF) ^ 0xFFFF)>>9;
661 filter[i+1] = (((xpos+xInc ) & 0xFFFF) ^ 0xFFFF)>>9;
662 filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;
663 filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;
666 memcpy(filterCode + fragmentPos, fragment, fragmentLength);
668 filterCode[fragmentPos + imm8OfPShufW1]=
669 (a+inc) | ((b+inc)<<2) | ((c+inc)<<4) | ((d+inc)<<6);
670 filterCode[fragmentPos + imm8OfPShufW2]=
671 a | (b<<2) | (c<<4) | (d<<6);
673 if (i+4-inc>=dstW) shift=maxShift; //avoid overread
674 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align
676 if (shift && i>=shift) {
677 filterCode[fragmentPos + imm8OfPShufW1]+= 0x55*shift;
678 filterCode[fragmentPos + imm8OfPShufW2]+= 0x55*shift;
679 filterPos[i/2]-=shift;
683 fragmentPos+= fragmentLength;
686 filterCode[fragmentPos]= RET;
691 filterPos[((i/2)+1)&(~1)]= xpos>>16; // needed to jump to the next part
693 return fragmentPos + 1;
695 #endif /* HAVE_MMX2 */
697 static void getSubSampleFactors(int *h, int *v, enum PixelFormat format)
699 *h = av_pix_fmt_descriptors[format].log2_chroma_w;
700 *v = av_pix_fmt_descriptors[format].log2_chroma_h;
703 int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
704 int srcRange, const int table[4], int dstRange,
705 int brightness, int contrast, int saturation)
707 memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);
708 memcpy(c->dstColorspaceTable, table, sizeof(int)*4);
710 c->brightness= brightness;
711 c->contrast = contrast;
712 c->saturation= saturation;
713 c->srcRange = srcRange;
714 c->dstRange = dstRange;
715 if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
717 c->dstFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[c->dstFormat]);
718 c->srcFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[c->srcFormat]);
720 ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);
723 if (HAVE_ALTIVEC && av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC)
724 ff_yuv2rgb_init_tables_altivec(c, inv_table, brightness, contrast, saturation);
728 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table,
729 int *srcRange, int **table, int *dstRange,
730 int *brightness, int *contrast, int *saturation)
732 if (!c || isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
734 *inv_table = c->srcColorspaceTable;
735 *table = c->dstColorspaceTable;
736 *srcRange = c->srcRange;
737 *dstRange = c->dstRange;
738 *brightness= c->brightness;
739 *contrast = c->contrast;
740 *saturation= c->saturation;
745 static int handle_jpeg(enum PixelFormat *format)
748 case PIX_FMT_YUVJ420P: *format = PIX_FMT_YUV420P; return 1;
749 case PIX_FMT_YUVJ422P: *format = PIX_FMT_YUV422P; return 1;
750 case PIX_FMT_YUVJ444P: *format = PIX_FMT_YUV444P; return 1;
751 case PIX_FMT_YUVJ440P: *format = PIX_FMT_YUV440P; return 1;
756 static int handle_0alpha(enum PixelFormat *format)
759 case PIX_FMT_0BGR : *format = PIX_FMT_ABGR ; return 1;
760 case PIX_FMT_BGR0 : *format = PIX_FMT_BGRA ; return 4;
761 case PIX_FMT_0RGB : *format = PIX_FMT_ARGB ; return 1;
762 case PIX_FMT_RGB0 : *format = PIX_FMT_RGBA ; return 4;
767 SwsContext *sws_alloc_context(void)
769 SwsContext *c= av_mallocz(sizeof(SwsContext));
771 c->av_class = &sws_context_class;
772 av_opt_set_defaults(c);
777 int sws_init_context(SwsContext *c, SwsFilter *srcFilter, SwsFilter *dstFilter)
780 int usesVFilter, usesHFilter;
782 SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};
787 int dst_stride = FFALIGN(dstW * sizeof(int16_t)+66, 16);
788 int flags, cpu_flags;
789 enum PixelFormat srcFormat= c->srcFormat;
790 enum PixelFormat dstFormat= c->dstFormat;
792 cpu_flags = av_get_cpu_flags();
795 if (!rgb15to16) sws_rgb2rgb_init();
797 unscaled = (srcW == dstW && srcH == dstH);
799 handle_jpeg(&srcFormat);
800 handle_jpeg(&dstFormat);
801 handle_0alpha(&srcFormat);
802 handle_0alpha(&dstFormat);
804 if(srcFormat!=c->srcFormat || dstFormat!=c->dstFormat){
805 av_log(c, AV_LOG_WARNING, "deprecated pixel format used, make sure you did set range correctly\n");
806 c->srcFormat= srcFormat;
807 c->dstFormat= dstFormat;
810 if (!sws_isSupportedInput(srcFormat)) {
811 av_log(c, AV_LOG_ERROR, "%s is not supported as input pixel format\n", av_get_pix_fmt_name(srcFormat));
812 return AVERROR(EINVAL);
814 if (!sws_isSupportedOutput(dstFormat)) {
815 av_log(c, AV_LOG_ERROR, "%s is not supported as output pixel format\n", av_get_pix_fmt_name(dstFormat));
816 return AVERROR(EINVAL);
819 i= flags & ( SWS_POINT
830 if(!i || (i & (i-1))) {
831 av_log(c, AV_LOG_ERROR, "Exactly one scaler algorithm must be chosen, got %X\n", i);
832 return AVERROR(EINVAL);
835 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
836 av_log(c, AV_LOG_ERROR, "%dx%d -> %dx%d is invalid scaling dimension\n",
837 srcW, srcH, dstW, dstH);
838 return AVERROR(EINVAL);
841 if (!dstFilter) dstFilter= &dummyFilter;
842 if (!srcFilter) srcFilter= &dummyFilter;
844 c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;
845 c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;
846 c->dstFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[dstFormat]);
847 c->srcFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[srcFormat]);
848 c->vRounder= 4* 0x0001000100010001ULL;
850 usesVFilter = (srcFilter->lumV && srcFilter->lumV->length>1) ||
851 (srcFilter->chrV && srcFilter->chrV->length>1) ||
852 (dstFilter->lumV && dstFilter->lumV->length>1) ||
853 (dstFilter->chrV && dstFilter->chrV->length>1);
854 usesHFilter = (srcFilter->lumH && srcFilter->lumH->length>1) ||
855 (srcFilter->chrH && srcFilter->chrH->length>1) ||
856 (dstFilter->lumH && dstFilter->lumH->length>1) ||
857 (dstFilter->chrH && dstFilter->chrH->length>1);
859 getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);
860 getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);
862 // reuse chroma for 2 pixels RGB/BGR unless user wants full chroma interpolation
863 if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) {
865 av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to odd output size\n");
866 flags |= SWS_FULL_CHR_H_INT;
869 c->chrDstHSubSample = 1;
872 // drop some chroma lines if the user wants it
873 c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;
874 c->chrSrcVSubSample+= c->vChrDrop;
876 // drop every other pixel for chroma calculation unless user wants full chroma
877 if (isAnyRGB(srcFormat) && !(flags&SWS_FULL_CHR_H_INP)
878 && srcFormat!=PIX_FMT_RGB8 && srcFormat!=PIX_FMT_BGR8
879 && srcFormat!=PIX_FMT_RGB4 && srcFormat!=PIX_FMT_BGR4
880 && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE
881 && ((dstW>>c->chrDstHSubSample) <= (srcW>>1) || (flags&SWS_FAST_BILINEAR)))
882 c->chrSrcHSubSample=1;
884 // Note the -((-x)>>y) is so that we always round toward +inf.
885 c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);
886 c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);
887 c->chrDstW= -((-dstW) >> c->chrDstHSubSample);
888 c->chrDstH= -((-dstH) >> c->chrDstVSubSample);
890 /* unscaled special cases */
891 if (unscaled && !usesHFilter && !usesVFilter && (c->srcRange == c->dstRange || isAnyRGB(dstFormat))) {
892 ff_get_unscaled_swscale(c);
895 if (flags&SWS_PRINT_INFO)
896 av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",
897 av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
902 c->srcBpc = 1 + av_pix_fmt_descriptors[srcFormat].comp[0].depth_minus1;
905 c->dstBpc = 1 + av_pix_fmt_descriptors[dstFormat].comp[0].depth_minus1;
908 if (isAnyRGB(srcFormat) || srcFormat == PIX_FMT_PAL8)
912 FF_ALLOC_OR_GOTO(c, c->formatConvBuffer, FFALIGN(srcW*2+78, 16) * 2, fail);
913 if (HAVE_MMX2 && cpu_flags & AV_CPU_FLAG_MMX2 && c->srcBpc == 8 && c->dstBpc <= 10) {
914 c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;
915 if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR)) {
916 if (flags&SWS_PRINT_INFO)
917 av_log(c, AV_LOG_INFO, "output width is not a multiple of 32 -> no MMX2 scaler\n");
919 if (usesHFilter || isNBPS(c->srcFormat) || is16BPS(c->srcFormat) || isAnyRGB(c->srcFormat)) c->canMMX2BeUsed=0;
924 c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;
925 c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;
927 // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst
928 // but only for the FAST_BILINEAR mode otherwise do correct scaling
929 // n-2 is the last chrominance sample available
930 // this is not perfect, but no one should notice the difference, the more correct variant
931 // would be like the vertical one, but that would require some special code for the
932 // first and last pixel
933 if (flags&SWS_FAST_BILINEAR) {
934 if (c->canMMX2BeUsed) {
938 //we don't use the x86 asm scaler if MMX is available
939 else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX && c->dstBpc <= 10) {
940 c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;
941 c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;
945 /* precalculate horizontal scaler filter coefficients */
948 // can't downscale !!!
949 if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR)) {
950 c->lumMmx2FilterCodeSize = initMMX2HScaler( dstW, c->lumXInc, NULL, NULL, NULL, 8);
951 c->chrMmx2FilterCodeSize = initMMX2HScaler(c->chrDstW, c->chrXInc, NULL, NULL, NULL, 4);
954 c->lumMmx2FilterCode = mmap(NULL, c->lumMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
955 c->chrMmx2FilterCode = mmap(NULL, c->chrMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
956 #elif HAVE_VIRTUALALLOC
957 c->lumMmx2FilterCode = VirtualAlloc(NULL, c->lumMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
958 c->chrMmx2FilterCode = VirtualAlloc(NULL, c->chrMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
960 c->lumMmx2FilterCode = av_malloc(c->lumMmx2FilterCodeSize);
961 c->chrMmx2FilterCode = av_malloc(c->chrMmx2FilterCodeSize);
965 if (c->lumMmx2FilterCode == MAP_FAILED || c->chrMmx2FilterCode == MAP_FAILED)
967 if (!c->lumMmx2FilterCode || !c->chrMmx2FilterCode)
970 av_log(c, AV_LOG_ERROR, "Failed to allocate MMX2FilterCode\n");
971 return AVERROR(ENOMEM);
973 FF_ALLOCZ_OR_GOTO(c, c->hLumFilter , (dstW /8+8)*sizeof(int16_t), fail);
974 FF_ALLOCZ_OR_GOTO(c, c->hChrFilter , (c->chrDstW /4+8)*sizeof(int16_t), fail);
975 FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW /2/8+8)*sizeof(int32_t), fail);
976 FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW/2/4+8)*sizeof(int32_t), fail);
978 initMMX2HScaler( dstW, c->lumXInc, c->lumMmx2FilterCode, c->hLumFilter, (uint32_t*)c->hLumFilterPos, 8);
979 initMMX2HScaler(c->chrDstW, c->chrXInc, c->chrMmx2FilterCode, c->hChrFilter, (uint32_t*)c->hChrFilterPos, 4);
982 mprotect(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize, PROT_EXEC | PROT_READ);
983 mprotect(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize, PROT_EXEC | PROT_READ);
986 #endif /* HAVE_MMX2 */
988 const int filterAlign=
989 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? 4 :
990 (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) ? 8 :
993 if (initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,
994 srcW , dstW, filterAlign, 1<<14,
995 (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags, cpu_flags,
996 srcFilter->lumH, dstFilter->lumH, c->param) < 0)
998 if (initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,
999 c->chrSrcW, c->chrDstW, filterAlign, 1<<14,
1000 (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags, cpu_flags,
1001 srcFilter->chrH, dstFilter->chrH, c->param) < 0)
1004 } // initialize horizontal stuff
1006 /* precalculate vertical scaler filter coefficients */
1008 const int filterAlign=
1009 (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? 2 :
1010 (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) ? 8 :
1013 if (initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,
1014 srcH , dstH, filterAlign, (1<<12),
1015 (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags, cpu_flags,
1016 srcFilter->lumV, dstFilter->lumV, c->param) < 0)
1018 if (initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,
1019 c->chrSrcH, c->chrDstH, filterAlign, (1<<12),
1020 (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags, cpu_flags,
1021 srcFilter->chrV, dstFilter->chrV, c->param) < 0)
1025 FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof (vector signed short)*c->vLumFilterSize*c->dstH, fail);
1026 FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH, fail);
1028 for (i=0;i<c->vLumFilterSize*c->dstH;i++) {
1030 short *p = (short *)&c->vYCoeffsBank[i];
1032 p[j] = c->vLumFilter[i];
1035 for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {
1037 short *p = (short *)&c->vCCoeffsBank[i];
1039 p[j] = c->vChrFilter[i];
1044 // calculate buffer sizes so that they won't run out while handling these damn slices
1045 c->vLumBufSize= c->vLumFilterSize;
1046 c->vChrBufSize= c->vChrFilterSize;
1047 for (i=0; i<dstH; i++) {
1048 int chrI= (int64_t)i*c->chrDstH / dstH;
1049 int nextSlice= FFMAX(c->vLumFilterPos[i ] + c->vLumFilterSize - 1,
1050 ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));
1052 nextSlice>>= c->chrSrcVSubSample;
1053 nextSlice<<= c->chrSrcVSubSample;
1054 if (c->vLumFilterPos[i ] + c->vLumBufSize < nextSlice)
1055 c->vLumBufSize= nextSlice - c->vLumFilterPos[i];
1056 if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))
1057 c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];
1060 // allocate pixbufs (we use dynamic allocation because otherwise we would need to
1061 // allocate several megabytes to handle all possible cases)
1062 FF_ALLOC_OR_GOTO(c, c->lumPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);
1063 FF_ALLOC_OR_GOTO(c, c->chrUPixBuf, c->vChrBufSize*2*sizeof(int16_t*), fail);
1064 FF_ALLOC_OR_GOTO(c, c->chrVPixBuf, c->vChrBufSize*2*sizeof(int16_t*), fail);
1065 if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat))
1066 FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);
1067 //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)
1068 /* align at 16 bytes for AltiVec */
1069 for (i=0; i<c->vLumBufSize; i++) {
1070 FF_ALLOCZ_OR_GOTO(c, c->lumPixBuf[i+c->vLumBufSize], dst_stride+16, fail);
1071 c->lumPixBuf[i] = c->lumPixBuf[i+c->vLumBufSize];
1073 // 64 / c->scalingBpp is the same as 16 / sizeof(scaling_intermediate)
1074 c->uv_off = (dst_stride>>1) + 64 / (c->dstBpc &~ 7);
1075 c->uv_offx2 = dst_stride + 16;
1076 for (i=0; i<c->vChrBufSize; i++) {
1077 FF_ALLOC_OR_GOTO(c, c->chrUPixBuf[i+c->vChrBufSize], dst_stride*2+32, fail);
1078 c->chrUPixBuf[i] = c->chrUPixBuf[i+c->vChrBufSize];
1079 c->chrVPixBuf[i] = c->chrVPixBuf[i+c->vChrBufSize] = c->chrUPixBuf[i] + (dst_stride >> 1) + 8;
1081 if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf)
1082 for (i=0; i<c->vLumBufSize; i++) {
1083 FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf[i+c->vLumBufSize], dst_stride+16, fail);
1084 c->alpPixBuf[i] = c->alpPixBuf[i+c->vLumBufSize];
1087 //try to avoid drawing green stuff between the right end and the stride end
1088 for (i=0; i<c->vChrBufSize; i++)
1089 if(av_pix_fmt_descriptors[c->dstFormat].comp[0].depth_minus1 == 15){
1090 av_assert0(c->dstBpc > 10);
1091 for(j=0; j<dst_stride/2+1; j++)
1092 ((int32_t*)(c->chrUPixBuf[i]))[j] = 1<<18;
1094 for(j=0; j<dst_stride+1; j++)
1095 ((int16_t*)(c->chrUPixBuf[i]))[j] = 1<<14;
1097 assert(c->chrDstH <= dstH);
1099 if (flags&SWS_PRINT_INFO) {
1100 if (flags&SWS_FAST_BILINEAR) av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");
1101 else if (flags&SWS_BILINEAR) av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");
1102 else if (flags&SWS_BICUBIC) av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");
1103 else if (flags&SWS_X) av_log(c, AV_LOG_INFO, "Experimental scaler, ");
1104 else if (flags&SWS_POINT) av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");
1105 else if (flags&SWS_AREA) av_log(c, AV_LOG_INFO, "Area Averaging scaler, ");
1106 else if (flags&SWS_BICUBLIN) av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");
1107 else if (flags&SWS_GAUSS) av_log(c, AV_LOG_INFO, "Gaussian scaler, ");
1108 else if (flags&SWS_SINC) av_log(c, AV_LOG_INFO, "Sinc scaler, ");
1109 else if (flags&SWS_LANCZOS) av_log(c, AV_LOG_INFO, "Lanczos scaler, ");
1110 else if (flags&SWS_SPLINE) av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");
1111 else av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");
1113 av_log(c, AV_LOG_INFO, "from %s to %s%s ",
1114 av_get_pix_fmt_name(srcFormat),
1116 dstFormat == PIX_FMT_BGR555 || dstFormat == PIX_FMT_BGR565 ||
1117 dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE ||
1118 dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE ? "dithered " : "",
1122 av_get_pix_fmt_name(dstFormat));
1124 if (HAVE_MMX2 && cpu_flags & AV_CPU_FLAG_MMX2) av_log(c, AV_LOG_INFO, "using MMX2\n");
1125 else if (HAVE_AMD3DNOW && cpu_flags & AV_CPU_FLAG_3DNOW) av_log(c, AV_LOG_INFO, "using 3DNOW\n");
1126 else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) av_log(c, AV_LOG_INFO, "using MMX\n");
1127 else if (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) av_log(c, AV_LOG_INFO, "using AltiVec\n");
1128 else av_log(c, AV_LOG_INFO, "using C\n");
1130 av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
1131 av_log(c, AV_LOG_DEBUG, "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1132 c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
1133 av_log(c, AV_LOG_DEBUG, "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1134 c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);
1137 c->swScale= ff_getSwsFunc(c);
1139 fail: //FIXME replace things by appropriate error codes
1143 #if FF_API_SWS_GETCONTEXT
1144 SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
1145 int dstW, int dstH, enum PixelFormat dstFormat, int flags,
1146 SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
1150 if(!(c=sws_alloc_context()))
1158 c->srcRange = handle_jpeg(&srcFormat);
1159 c->dstRange = handle_jpeg(&dstFormat);
1160 c->src0Alpha = handle_0alpha(&srcFormat);
1161 c->dst0Alpha = handle_0alpha(&dstFormat);
1162 c->srcFormat= srcFormat;
1163 c->dstFormat= dstFormat;
1166 c->param[0] = param[0];
1167 c->param[1] = param[1];
1169 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);
1171 if(sws_init_context(c, srcFilter, dstFilter) < 0){
1180 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
1181 float lumaSharpen, float chromaSharpen,
1182 float chromaHShift, float chromaVShift,
1185 SwsFilter *filter= av_malloc(sizeof(SwsFilter));
1189 if (lumaGBlur!=0.0) {
1190 filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);
1191 filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);
1193 filter->lumH= sws_getIdentityVec();
1194 filter->lumV= sws_getIdentityVec();
1197 if (chromaGBlur!=0.0) {
1198 filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);
1199 filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);
1201 filter->chrH= sws_getIdentityVec();
1202 filter->chrV= sws_getIdentityVec();
1205 if (chromaSharpen!=0.0) {
1206 SwsVector *id= sws_getIdentityVec();
1207 sws_scaleVec(filter->chrH, -chromaSharpen);
1208 sws_scaleVec(filter->chrV, -chromaSharpen);
1209 sws_addVec(filter->chrH, id);
1210 sws_addVec(filter->chrV, id);
1214 if (lumaSharpen!=0.0) {
1215 SwsVector *id= sws_getIdentityVec();
1216 sws_scaleVec(filter->lumH, -lumaSharpen);
1217 sws_scaleVec(filter->lumV, -lumaSharpen);
1218 sws_addVec(filter->lumH, id);
1219 sws_addVec(filter->lumV, id);
1223 if (chromaHShift != 0.0)
1224 sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));
1226 if (chromaVShift != 0.0)
1227 sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));
1229 sws_normalizeVec(filter->chrH, 1.0);
1230 sws_normalizeVec(filter->chrV, 1.0);
1231 sws_normalizeVec(filter->lumH, 1.0);
1232 sws_normalizeVec(filter->lumV, 1.0);
1234 if (verbose) sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);
1235 if (verbose) sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);
1240 SwsVector *sws_allocVec(int length)
1242 SwsVector *vec = av_malloc(sizeof(SwsVector));
1245 vec->length = length;
1246 vec->coeff = av_malloc(sizeof(double) * length);
1252 SwsVector *sws_getGaussianVec(double variance, double quality)
1254 const int length= (int)(variance*quality + 0.5) | 1;
1256 double middle= (length-1)*0.5;
1257 SwsVector *vec= sws_allocVec(length);
1262 for (i=0; i<length; i++) {
1263 double dist= i-middle;
1264 vec->coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*M_PI);
1267 sws_normalizeVec(vec, 1.0);
1272 SwsVector *sws_getConstVec(double c, int length)
1275 SwsVector *vec= sws_allocVec(length);
1280 for (i=0; i<length; i++)
1286 SwsVector *sws_getIdentityVec(void)
1288 return sws_getConstVec(1.0, 1);
1291 static double sws_dcVec(SwsVector *a)
1296 for (i=0; i<a->length; i++)
1302 void sws_scaleVec(SwsVector *a, double scalar)
1306 for (i=0; i<a->length; i++)
1307 a->coeff[i]*= scalar;
1310 void sws_normalizeVec(SwsVector *a, double height)
1312 sws_scaleVec(a, height/sws_dcVec(a));
1315 static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b)
1317 int length= a->length + b->length - 1;
1319 SwsVector *vec= sws_getConstVec(0.0, length);
1324 for (i=0; i<a->length; i++) {
1325 for (j=0; j<b->length; j++) {
1326 vec->coeff[i+j]+= a->coeff[i]*b->coeff[j];
1333 static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b)
1335 int length= FFMAX(a->length, b->length);
1337 SwsVector *vec= sws_getConstVec(0.0, length);
1342 for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
1343 for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];
1348 static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b)
1350 int length= FFMAX(a->length, b->length);
1352 SwsVector *vec= sws_getConstVec(0.0, length);
1357 for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
1358 for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];
1363 /* shift left / or right if "shift" is negative */
1364 static SwsVector *sws_getShiftedVec(SwsVector *a, int shift)
1366 int length= a->length + FFABS(shift)*2;
1368 SwsVector *vec= sws_getConstVec(0.0, length);
1373 for (i=0; i<a->length; i++) {
1374 vec->coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];
1380 void sws_shiftVec(SwsVector *a, int shift)
1382 SwsVector *shifted= sws_getShiftedVec(a, shift);
1384 a->coeff= shifted->coeff;
1385 a->length= shifted->length;
1389 void sws_addVec(SwsVector *a, SwsVector *b)
1391 SwsVector *sum= sws_sumVec(a, b);
1393 a->coeff= sum->coeff;
1394 a->length= sum->length;
1398 void sws_subVec(SwsVector *a, SwsVector *b)
1400 SwsVector *diff= sws_diffVec(a, b);
1402 a->coeff= diff->coeff;
1403 a->length= diff->length;
1407 void sws_convVec(SwsVector *a, SwsVector *b)
1409 SwsVector *conv= sws_getConvVec(a, b);
1411 a->coeff= conv->coeff;
1412 a->length= conv->length;
1416 SwsVector *sws_cloneVec(SwsVector *a)
1419 SwsVector *vec= sws_allocVec(a->length);
1424 for (i=0; i<a->length; i++) vec->coeff[i]= a->coeff[i];
1429 void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)
1436 for (i=0; i<a->length; i++)
1437 if (a->coeff[i]>max) max= a->coeff[i];
1439 for (i=0; i<a->length; i++)
1440 if (a->coeff[i]<min) min= a->coeff[i];
1444 for (i=0; i<a->length; i++) {
1445 int x= (int)((a->coeff[i]-min)*60.0/range +0.5);
1446 av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);
1447 for (;x>0; x--) av_log(log_ctx, log_level, " ");
1448 av_log(log_ctx, log_level, "|\n");
1452 void sws_freeVec(SwsVector *a)
1455 av_freep(&a->coeff);
1460 void sws_freeFilter(SwsFilter *filter)
1462 if (!filter) return;
1464 if (filter->lumH) sws_freeVec(filter->lumH);
1465 if (filter->lumV) sws_freeVec(filter->lumV);
1466 if (filter->chrH) sws_freeVec(filter->chrH);
1467 if (filter->chrV) sws_freeVec(filter->chrV);
1471 void sws_freeContext(SwsContext *c)
1477 for (i=0; i<c->vLumBufSize; i++)
1478 av_freep(&c->lumPixBuf[i]);
1479 av_freep(&c->lumPixBuf);
1482 if (c->chrUPixBuf) {
1483 for (i=0; i<c->vChrBufSize; i++)
1484 av_freep(&c->chrUPixBuf[i]);
1485 av_freep(&c->chrUPixBuf);
1486 av_freep(&c->chrVPixBuf);
1489 if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {
1490 for (i=0; i<c->vLumBufSize; i++)
1491 av_freep(&c->alpPixBuf[i]);
1492 av_freep(&c->alpPixBuf);
1495 av_freep(&c->vLumFilter);
1496 av_freep(&c->vChrFilter);
1497 av_freep(&c->hLumFilter);
1498 av_freep(&c->hChrFilter);
1500 av_freep(&c->vYCoeffsBank);
1501 av_freep(&c->vCCoeffsBank);
1504 av_freep(&c->vLumFilterPos);
1505 av_freep(&c->vChrFilterPos);
1506 av_freep(&c->hLumFilterPos);
1507 av_freep(&c->hChrFilterPos);
1510 #ifdef MAP_ANONYMOUS
1511 if (c->lumMmx2FilterCode) munmap(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize);
1512 if (c->chrMmx2FilterCode) munmap(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize);
1513 #elif HAVE_VIRTUALALLOC
1514 if (c->lumMmx2FilterCode) VirtualFree(c->lumMmx2FilterCode, 0, MEM_RELEASE);
1515 if (c->chrMmx2FilterCode) VirtualFree(c->chrMmx2FilterCode, 0, MEM_RELEASE);
1517 av_free(c->lumMmx2FilterCode);
1518 av_free(c->chrMmx2FilterCode);
1520 c->lumMmx2FilterCode=NULL;
1521 c->chrMmx2FilterCode=NULL;
1522 #endif /* HAVE_MMX */
1524 av_freep(&c->yuvTable);
1525 av_freep(&c->formatConvBuffer);
1530 struct SwsContext *sws_getCachedContext(struct SwsContext *context,
1531 int srcW, int srcH, enum PixelFormat srcFormat,
1532 int dstW, int dstH, enum PixelFormat dstFormat, int flags,
1533 SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
1535 static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};
1538 param = default_param;
1541 (context->srcW != srcW ||
1542 context->srcH != srcH ||
1543 context->srcFormat != srcFormat ||
1544 context->dstW != dstW ||
1545 context->dstH != dstH ||
1546 context->dstFormat != dstFormat ||
1547 context->flags != flags ||
1548 context->param[0] != param[0] ||
1549 context->param[1] != param[1])) {
1550 sws_freeContext(context);
1555 if (!(context = sws_alloc_context()))
1557 context->srcW = srcW;
1558 context->srcH = srcH;
1559 context->srcRange = handle_jpeg(&srcFormat);
1560 context->src0Alpha = handle_0alpha(&srcFormat);
1561 context->srcFormat = srcFormat;
1562 context->dstW = dstW;
1563 context->dstH = dstH;
1564 context->dstRange = handle_jpeg(&dstFormat);
1565 context->dst0Alpha = handle_0alpha(&dstFormat);
1566 context->dstFormat = dstFormat;
1567 context->flags = flags;
1568 context->param[0] = param[0];
1569 context->param[1] = param[1];
1570 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);
1571 if (sws_init_context(context, srcFilter, dstFilter) < 0) {
1572 sws_freeContext(context);