1/* 2 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at> 3 * 4 * This file is part of FFmpeg. 5 * 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. 10 * 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. 15 * 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 19 */ 20 21#define _SVID_SOURCE //needed for MAP_ANONYMOUS 22#include <inttypes.h> 23#include <string.h> 24#include <math.h> 25#include <stdio.h> 26#include "config.h" 27#include <assert.h> 28#if HAVE_SYS_MMAN_H 29#include <sys/mman.h> 30#if defined(MAP_ANON) && !defined(MAP_ANONYMOUS) 31#define MAP_ANONYMOUS MAP_ANON 32#endif 33#endif 34#if HAVE_VIRTUALALLOC 35#define WIN32_LEAN_AND_MEAN 36#include <windows.h> 37#endif 38#include "swscale.h" 39#include "swscale_internal.h" 40#include "rgb2rgb.h" 41#include "libavutil/intreadwrite.h" 42#include "libavutil/x86_cpu.h" 43#include "libavutil/avutil.h" 44#include "libavutil/bswap.h" 45#include "libavutil/pixdesc.h" 46 47unsigned swscale_version(void) 48{ 49 return LIBSWSCALE_VERSION_INT; 50} 51 52const char *swscale_configuration(void) 53{ 54 return FFMPEG_CONFIGURATION; 55} 56 57const char *swscale_license(void) 58{ 59#define LICENSE_PREFIX "libswscale license: " 60 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1; 61} 62 63#define RET 0xC3 //near return opcode for x86 64 65#define isSupportedIn(x) ( \ 66 (x)==PIX_FMT_YUV420P \ 67 || (x)==PIX_FMT_YUVA420P \ 68 || (x)==PIX_FMT_YUYV422 \ 69 || (x)==PIX_FMT_UYVY422 \ 70 || (x)==PIX_FMT_RGB48BE \ 71 || (x)==PIX_FMT_RGB48LE \ 72 || (x)==PIX_FMT_RGB32 \ 73 || (x)==PIX_FMT_RGB32_1 \ 74 || (x)==PIX_FMT_BGR24 \ 75 || (x)==PIX_FMT_BGR565 \ 76 || (x)==PIX_FMT_BGR555 \ 77 || (x)==PIX_FMT_BGR32 \ 78 || (x)==PIX_FMT_BGR32_1 \ 79 || (x)==PIX_FMT_RGB24 \ 80 || (x)==PIX_FMT_RGB565 \ 81 || (x)==PIX_FMT_RGB555 \ 82 || (x)==PIX_FMT_GRAY8 \ 83 || (x)==PIX_FMT_YUV410P \ 84 || (x)==PIX_FMT_YUV440P \ 85 || (x)==PIX_FMT_NV12 \ 86 || (x)==PIX_FMT_NV21 \ 87 || (x)==PIX_FMT_GRAY16BE \ 88 || (x)==PIX_FMT_GRAY16LE \ 89 || (x)==PIX_FMT_YUV444P \ 90 || (x)==PIX_FMT_YUV422P \ 91 || (x)==PIX_FMT_YUV411P \ 92 || (x)==PIX_FMT_YUVJ420P \ 93 || (x)==PIX_FMT_YUVJ422P \ 94 || (x)==PIX_FMT_YUVJ440P \ 95 || (x)==PIX_FMT_YUVJ444P \ 96 || (x)==PIX_FMT_PAL8 \ 97 || (x)==PIX_FMT_BGR8 \ 98 || (x)==PIX_FMT_RGB8 \ 99 || (x)==PIX_FMT_BGR4_BYTE \ 100 || (x)==PIX_FMT_RGB4_BYTE \ 101 || (x)==PIX_FMT_YUV440P \ 102 || (x)==PIX_FMT_MONOWHITE \ 103 || (x)==PIX_FMT_MONOBLACK \ 104 || (x)==PIX_FMT_YUV420P16LE \ 105 || (x)==PIX_FMT_YUV422P16LE \ 106 || (x)==PIX_FMT_YUV444P16LE \ 107 || (x)==PIX_FMT_YUV420P16BE \ 108 || (x)==PIX_FMT_YUV422P16BE \ 109 || (x)==PIX_FMT_YUV444P16BE \ 110 ) 111 112int sws_isSupportedInput(enum PixelFormat pix_fmt) 113{ 114 return isSupportedIn(pix_fmt); 115} 116 117#define isSupportedOut(x) ( \ 118 (x)==PIX_FMT_YUV420P \ 119 || (x)==PIX_FMT_YUVA420P \ 120 || (x)==PIX_FMT_YUYV422 \ 121 || (x)==PIX_FMT_UYVY422 \ 122 || (x)==PIX_FMT_YUV444P \ 123 || (x)==PIX_FMT_YUV422P \ 124 || (x)==PIX_FMT_YUV411P \ 125 || (x)==PIX_FMT_YUVJ420P \ 126 || (x)==PIX_FMT_YUVJ422P \ 127 || (x)==PIX_FMT_YUVJ440P \ 128 || (x)==PIX_FMT_YUVJ444P \ 129 || isAnyRGB(x) \ 130 || (x)==PIX_FMT_NV12 \ 131 || (x)==PIX_FMT_NV21 \ 132 || (x)==PIX_FMT_GRAY16BE \ 133 || (x)==PIX_FMT_GRAY16LE \ 134 || (x)==PIX_FMT_GRAY8 \ 135 || (x)==PIX_FMT_YUV410P \ 136 || (x)==PIX_FMT_YUV440P \ 137 || (x)==PIX_FMT_YUV420P16LE \ 138 || (x)==PIX_FMT_YUV422P16LE \ 139 || (x)==PIX_FMT_YUV444P16LE \ 140 || (x)==PIX_FMT_YUV420P16BE \ 141 || (x)==PIX_FMT_YUV422P16BE \ 142 || (x)==PIX_FMT_YUV444P16BE \ 143 ) 144 145int sws_isSupportedOutput(enum PixelFormat pix_fmt) 146{ 147 return isSupportedOut(pix_fmt); 148} 149 150extern const int32_t ff_yuv2rgb_coeffs[8][4]; 151 152const char *sws_format_name(enum PixelFormat format) 153{ 154 if ((unsigned)format < PIX_FMT_NB && av_pix_fmt_descriptors[format].name) 155 return av_pix_fmt_descriptors[format].name; 156 else 157 return "Unknown format"; 158} 159 160static double getSplineCoeff(double a, double b, double c, double d, double dist) 161{ 162// printf("%f %f %f %f %f\n", a,b,c,d,dist); 163 if (dist<=1.0) return ((d*dist + c)*dist + b)*dist +a; 164 else return getSplineCoeff( 0.0, 165 b+ 2.0*c + 3.0*d, 166 c + 3.0*d, 167 -b- 3.0*c - 6.0*d, 168 dist-1.0); 169} 170 171static int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc, 172 int srcW, int dstW, int filterAlign, int one, int flags, 173 SwsVector *srcFilter, SwsVector *dstFilter, double param[2]) 174{ 175 int i; 176 int filterSize; 177 int filter2Size; 178 int minFilterSize; 179 int64_t *filter=NULL; 180 int64_t *filter2=NULL; 181 const int64_t fone= 1LL<<54; 182 int ret= -1; 183#if ARCH_X86 184 if (flags & SWS_CPU_CAPS_MMX) 185 __asm__ volatile("emms\n\t"::: "memory"); //FIXME this should not be required but it IS (even for non-MMX versions) 186#endif 187 188 // NOTE: the +1 is for the MMX scaler which reads over the end 189 FF_ALLOC_OR_GOTO(NULL, *filterPos, (dstW+1)*sizeof(int16_t), fail); 190 191 if (FFABS(xInc - 0x10000) <10) { // unscaled 192 int i; 193 filterSize= 1; 194 FF_ALLOCZ_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail); 195 196 for (i=0; i<dstW; i++) { 197 filter[i*filterSize]= fone; 198 (*filterPos)[i]=i; 199 } 200 201 } else if (flags&SWS_POINT) { // lame looking point sampling mode 202 int i; 203 int xDstInSrc; 204 filterSize= 1; 205 FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail); 206 207 xDstInSrc= xInc/2 - 0x8000; 208 for (i=0; i<dstW; i++) { 209 int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16; 210 211 (*filterPos)[i]= xx; 212 filter[i]= fone; 213 xDstInSrc+= xInc; 214 } 215 } else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) { // bilinear upscale 216 int i; 217 int xDstInSrc; 218 filterSize= 2; 219 FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail); 220 221 xDstInSrc= xInc/2 - 0x8000; 222 for (i=0; i<dstW; i++) { 223 int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16; 224 int j; 225 226 (*filterPos)[i]= xx; 227 //bilinear upscale / linear interpolate / area averaging 228 for (j=0; j<filterSize; j++) { 229 int64_t coeff= fone - FFABS((xx<<16) - xDstInSrc)*(fone>>16); 230 if (coeff<0) coeff=0; 231 filter[i*filterSize + j]= coeff; 232 xx++; 233 } 234 xDstInSrc+= xInc; 235 } 236 } else { 237 int xDstInSrc; 238 int sizeFactor; 239 240 if (flags&SWS_BICUBIC) sizeFactor= 4; 241 else if (flags&SWS_X) sizeFactor= 8; 242 else if (flags&SWS_AREA) sizeFactor= 1; //downscale only, for upscale it is bilinear 243 else if (flags&SWS_GAUSS) sizeFactor= 8; // infinite ;) 244 else if (flags&SWS_LANCZOS) sizeFactor= param[0] != SWS_PARAM_DEFAULT ? ceil(2*param[0]) : 6; 245 else if (flags&SWS_SINC) sizeFactor= 20; // infinite ;) 246 else if (flags&SWS_SPLINE) sizeFactor= 20; // infinite ;) 247 else if (flags&SWS_BILINEAR) sizeFactor= 2; 248 else { 249 sizeFactor= 0; //GCC warning killer 250 assert(0); 251 } 252 253 if (xInc <= 1<<16) filterSize= 1 + sizeFactor; // upscale 254 else filterSize= 1 + (sizeFactor*srcW + dstW - 1)/ dstW; 255 256 if (filterSize > srcW-2) filterSize=srcW-2; 257 258 FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail); 259 260 xDstInSrc= xInc - 0x10000; 261 for (i=0; i<dstW; i++) { 262 int xx= (xDstInSrc - ((filterSize-2)<<16)) / (1<<17); 263 int j; 264 (*filterPos)[i]= xx; 265 for (j=0; j<filterSize; j++) { 266 int64_t d= ((int64_t)FFABS((xx<<17) - xDstInSrc))<<13; 267 double floatd; 268 int64_t coeff; 269 270 if (xInc > 1<<16) 271 d= d*dstW/srcW; 272 floatd= d * (1.0/(1<<30)); 273 274 if (flags & SWS_BICUBIC) { 275 int64_t B= (param[0] != SWS_PARAM_DEFAULT ? param[0] : 0) * (1<<24); 276 int64_t C= (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1<<24); 277 int64_t dd = ( d*d)>>30; 278 int64_t ddd= (dd*d)>>30; 279 280 if (d < 1LL<<30) 281 coeff = (12*(1<<24)-9*B-6*C)*ddd + (-18*(1<<24)+12*B+6*C)*dd + (6*(1<<24)-2*B)*(1<<30); 282 else if (d < 1LL<<31) 283 coeff = (-B-6*C)*ddd + (6*B+30*C)*dd + (-12*B-48*C)*d + (8*B+24*C)*(1<<30); 284 else 285 coeff=0.0; 286 coeff *= fone>>(30+24); 287 } 288/* else if (flags & SWS_X) { 289 double p= param ? param*0.01 : 0.3; 290 coeff = d ? sin(d*PI)/(d*PI) : 1.0; 291 coeff*= pow(2.0, - p*d*d); 292 }*/ 293 else if (flags & SWS_X) { 294 double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0; 295 double c; 296 297 if (floatd<1.0) 298 c = cos(floatd*M_PI); 299 else 300 c=-1.0; 301 if (c<0.0) c= -pow(-c, A); 302 else c= pow( c, A); 303 coeff= (c*0.5 + 0.5)*fone; 304 } else if (flags & SWS_AREA) { 305 int64_t d2= d - (1<<29); 306 if (d2*xInc < -(1LL<<(29+16))) coeff= 1.0 * (1LL<<(30+16)); 307 else if (d2*xInc < (1LL<<(29+16))) coeff= -d2*xInc + (1LL<<(29+16)); 308 else coeff=0.0; 309 coeff *= fone>>(30+16); 310 } else if (flags & SWS_GAUSS) { 311 double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0; 312 coeff = (pow(2.0, - p*floatd*floatd))*fone; 313 } else if (flags & SWS_SINC) { 314 coeff = (d ? sin(floatd*M_PI)/(floatd*M_PI) : 1.0)*fone; 315 } else if (flags & SWS_LANCZOS) { 316 double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0; 317 coeff = (d ? sin(floatd*M_PI)*sin(floatd*M_PI/p)/(floatd*floatd*M_PI*M_PI/p) : 1.0)*fone; 318 if (floatd>p) coeff=0; 319 } else if (flags & SWS_BILINEAR) { 320 coeff= (1<<30) - d; 321 if (coeff<0) coeff=0; 322 coeff *= fone >> 30; 323 } else if (flags & SWS_SPLINE) { 324 double p=-2.196152422706632; 325 coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, floatd) * fone; 326 } else { 327 coeff= 0.0; //GCC warning killer 328 assert(0); 329 } 330 331 filter[i*filterSize + j]= coeff; 332 xx++; 333 } 334 xDstInSrc+= 2*xInc; 335 } 336 } 337 338 /* apply src & dst Filter to filter -> filter2 339 av_free(filter); 340 */ 341 assert(filterSize>0); 342 filter2Size= filterSize; 343 if (srcFilter) filter2Size+= srcFilter->length - 1; 344 if (dstFilter) filter2Size+= dstFilter->length - 1; 345 assert(filter2Size>0); 346 FF_ALLOCZ_OR_GOTO(NULL, filter2, filter2Size*dstW*sizeof(*filter2), fail); 347 348 for (i=0; i<dstW; i++) { 349 int j, k; 350 351 if(srcFilter) { 352 for (k=0; k<srcFilter->length; k++) { 353 for (j=0; j<filterSize; j++) 354 filter2[i*filter2Size + k + j] += srcFilter->coeff[k]*filter[i*filterSize + j]; 355 } 356 } else { 357 for (j=0; j<filterSize; j++) 358 filter2[i*filter2Size + j]= filter[i*filterSize + j]; 359 } 360 //FIXME dstFilter 361 362 (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2; 363 } 364 av_freep(&filter); 365 366 /* try to reduce the filter-size (step1 find size and shift left) */ 367 // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not). 368 minFilterSize= 0; 369 for (i=dstW-1; i>=0; i--) { 370 int min= filter2Size; 371 int j; 372 int64_t cutOff=0.0; 373 374 /* get rid of near zero elements on the left by shifting left */ 375 for (j=0; j<filter2Size; j++) { 376 int k; 377 cutOff += FFABS(filter2[i*filter2Size]); 378 379 if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break; 380 381 /* preserve monotonicity because the core can't handle the filter otherwise */ 382 if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break; 383 384 // move filter coefficients left 385 for (k=1; k<filter2Size; k++) 386 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k]; 387 filter2[i*filter2Size + k - 1]= 0; 388 (*filterPos)[i]++; 389 } 390 391 cutOff=0; 392 /* count near zeros on the right */ 393 for (j=filter2Size-1; j>0; j--) { 394 cutOff += FFABS(filter2[i*filter2Size + j]); 395 396 if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break; 397 min--; 398 } 399 400 if (min>minFilterSize) minFilterSize= min; 401 } 402 403 if (flags & SWS_CPU_CAPS_ALTIVEC) { 404 // we can handle the special case 4, 405 // so we don't want to go to the full 8 406 if (minFilterSize < 5) 407 filterAlign = 4; 408 409 // We really don't want to waste our time 410 // doing useless computation, so fall back on 411 // the scalar C code for very small filters. 412 // Vectorizing is worth it only if you have a 413 // decent-sized vector. 414 if (minFilterSize < 3) 415 filterAlign = 1; 416 } 417 418 if (flags & SWS_CPU_CAPS_MMX) { 419 // special case for unscaled vertical filtering 420 if (minFilterSize == 1 && filterAlign == 2) 421 filterAlign= 1; 422 } 423 424 assert(minFilterSize > 0); 425 filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1)); 426 assert(filterSize > 0); 427 filter= av_malloc(filterSize*dstW*sizeof(*filter)); 428 if (filterSize >= MAX_FILTER_SIZE*16/((flags&SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter) 429 goto fail; 430 *outFilterSize= filterSize; 431 432 if (flags&SWS_PRINT_INFO) 433 av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize); 434 /* try to reduce the filter-size (step2 reduce it) */ 435 for (i=0; i<dstW; i++) { 436 int j; 437 438 for (j=0; j<filterSize; j++) { 439 if (j>=filter2Size) filter[i*filterSize + j]= 0; 440 else filter[i*filterSize + j]= filter2[i*filter2Size + j]; 441 if((flags & SWS_BITEXACT) && j>=minFilterSize) 442 filter[i*filterSize + j]= 0; 443 } 444 } 445 446 //FIXME try to align filterPos if possible 447 448 //fix borders 449 for (i=0; i<dstW; i++) { 450 int j; 451 if ((*filterPos)[i] < 0) { 452 // move filter coefficients left to compensate for filterPos 453 for (j=1; j<filterSize; j++) { 454 int left= FFMAX(j + (*filterPos)[i], 0); 455 filter[i*filterSize + left] += filter[i*filterSize + j]; 456 filter[i*filterSize + j]=0; 457 } 458 (*filterPos)[i]= 0; 459 } 460 461 if ((*filterPos)[i] + filterSize > srcW) { 462 int shift= (*filterPos)[i] + filterSize - srcW; 463 // move filter coefficients right to compensate for filterPos 464 for (j=filterSize-2; j>=0; j--) { 465 int right= FFMIN(j + shift, filterSize-1); 466 filter[i*filterSize +right] += filter[i*filterSize +j]; 467 filter[i*filterSize +j]=0; 468 } 469 (*filterPos)[i]= srcW - filterSize; 470 } 471 } 472 473 // Note the +1 is for the MMX scaler which reads over the end 474 /* align at 16 for AltiVec (needed by hScale_altivec_real) */ 475 FF_ALLOCZ_OR_GOTO(NULL, *outFilter, *outFilterSize*(dstW+1)*sizeof(int16_t), fail); 476 477 /* normalize & store in outFilter */ 478 for (i=0; i<dstW; i++) { 479 int j; 480 int64_t error=0; 481 int64_t sum=0; 482 483 for (j=0; j<filterSize; j++) { 484 sum+= filter[i*filterSize + j]; 485 } 486 sum= (sum + one/2)/ one; 487 for (j=0; j<*outFilterSize; j++) { 488 int64_t v= filter[i*filterSize + j] + error; 489 int intV= ROUNDED_DIV(v, sum); 490 (*outFilter)[i*(*outFilterSize) + j]= intV; 491 error= v - intV*sum; 492 } 493 } 494 495 (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end 496 for (i=0; i<*outFilterSize; i++) { 497 int j= dstW*(*outFilterSize); 498 (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)]; 499 } 500 501 ret=0; 502fail: 503 av_free(filter); 504 av_free(filter2); 505 return ret; 506} 507 508#if ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT) 509static int initMMX2HScaler(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits) 510{ 511 uint8_t *fragmentA; 512 x86_reg imm8OfPShufW1A; 513 x86_reg imm8OfPShufW2A; 514 x86_reg fragmentLengthA; 515 uint8_t *fragmentB; 516 x86_reg imm8OfPShufW1B; 517 x86_reg imm8OfPShufW2B; 518 x86_reg fragmentLengthB; 519 int fragmentPos; 520 521 int xpos, i; 522 523 // create an optimized horizontal scaling routine 524 /* This scaler is made of runtime-generated MMX2 code using specially 525 * tuned pshufw instructions. For every four output pixels, if four 526 * input pixels are enough for the fast bilinear scaling, then a chunk 527 * of fragmentB is used. If five input pixels are needed, then a chunk 528 * of fragmentA is used. 529 */ 530 531 //code fragment 532 533 __asm__ volatile( 534 "jmp 9f \n\t" 535 // Begin 536 "0: \n\t" 537 "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t" 538 "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t" 539 "movd 1(%%"REG_c", %%"REG_S"), %%mm1 \n\t" 540 "punpcklbw %%mm7, %%mm1 \n\t" 541 "punpcklbw %%mm7, %%mm0 \n\t" 542 "pshufw $0xFF, %%mm1, %%mm1 \n\t" 543 "1: \n\t" 544 "pshufw $0xFF, %%mm0, %%mm0 \n\t" 545 "2: \n\t" 546 "psubw %%mm1, %%mm0 \n\t" 547 "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t" 548 "pmullw %%mm3, %%mm0 \n\t" 549 "psllw $7, %%mm1 \n\t" 550 "paddw %%mm1, %%mm0 \n\t" 551 552 "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t" 553 554 "add $8, %%"REG_a" \n\t" 555 // End 556 "9: \n\t" 557// "int $3 \n\t" 558 "lea " LOCAL_MANGLE(0b) ", %0 \n\t" 559 "lea " LOCAL_MANGLE(1b) ", %1 \n\t" 560 "lea " LOCAL_MANGLE(2b) ", %2 \n\t" 561 "dec %1 \n\t" 562 "dec %2 \n\t" 563 "sub %0, %1 \n\t" 564 "sub %0, %2 \n\t" 565 "lea " LOCAL_MANGLE(9b) ", %3 \n\t" 566 "sub %0, %3 \n\t" 567 568 569 :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A), 570 "=r" (fragmentLengthA) 571 ); 572 573 __asm__ volatile( 574 "jmp 9f \n\t" 575 // Begin 576 "0: \n\t" 577 "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t" 578 "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t" 579 "punpcklbw %%mm7, %%mm0 \n\t" 580 "pshufw $0xFF, %%mm0, %%mm1 \n\t" 581 "1: \n\t" 582 "pshufw $0xFF, %%mm0, %%mm0 \n\t" 583 "2: \n\t" 584 "psubw %%mm1, %%mm0 \n\t" 585 "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t" 586 "pmullw %%mm3, %%mm0 \n\t" 587 "psllw $7, %%mm1 \n\t" 588 "paddw %%mm1, %%mm0 \n\t" 589 590 "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t" 591 592 "add $8, %%"REG_a" \n\t" 593 // End 594 "9: \n\t" 595// "int $3 \n\t" 596 "lea " LOCAL_MANGLE(0b) ", %0 \n\t" 597 "lea " LOCAL_MANGLE(1b) ", %1 \n\t" 598 "lea " LOCAL_MANGLE(2b) ", %2 \n\t" 599 "dec %1 \n\t" 600 "dec %2 \n\t" 601 "sub %0, %1 \n\t" 602 "sub %0, %2 \n\t" 603 "lea " LOCAL_MANGLE(9b) ", %3 \n\t" 604 "sub %0, %3 \n\t" 605 606 607 :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B), 608 "=r" (fragmentLengthB) 609 ); 610 611 xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers 612 fragmentPos=0; 613 614 for (i=0; i<dstW/numSplits; i++) { 615 int xx=xpos>>16; 616 617 if ((i&3) == 0) { 618 int a=0; 619 int b=((xpos+xInc)>>16) - xx; 620 int c=((xpos+xInc*2)>>16) - xx; 621 int d=((xpos+xInc*3)>>16) - xx; 622 int inc = (d+1<4); 623 uint8_t *fragment = (d+1<4) ? fragmentB : fragmentA; 624 x86_reg imm8OfPShufW1 = (d+1<4) ? imm8OfPShufW1B : imm8OfPShufW1A; 625 x86_reg imm8OfPShufW2 = (d+1<4) ? imm8OfPShufW2B : imm8OfPShufW2A; 626 x86_reg fragmentLength = (d+1<4) ? fragmentLengthB : fragmentLengthA; 627 int maxShift= 3-(d+inc); 628 int shift=0; 629 630 if (filterCode) { 631 filter[i ] = (( xpos & 0xFFFF) ^ 0xFFFF)>>9; 632 filter[i+1] = (((xpos+xInc ) & 0xFFFF) ^ 0xFFFF)>>9; 633 filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9; 634 filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9; 635 filterPos[i/2]= xx; 636 637 memcpy(filterCode + fragmentPos, fragment, fragmentLength); 638 639 filterCode[fragmentPos + imm8OfPShufW1]= 640 (a+inc) | ((b+inc)<<2) | ((c+inc)<<4) | ((d+inc)<<6); 641 filterCode[fragmentPos + imm8OfPShufW2]= 642 a | (b<<2) | (c<<4) | (d<<6); 643 644 if (i+4-inc>=dstW) shift=maxShift; //avoid overread 645 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align 646 647 if (shift && i>=shift) { 648 filterCode[fragmentPos + imm8OfPShufW1]+= 0x55*shift; 649 filterCode[fragmentPos + imm8OfPShufW2]+= 0x55*shift; 650 filterPos[i/2]-=shift; 651 } 652 } 653 654 fragmentPos+= fragmentLength; 655 656 if (filterCode) 657 filterCode[fragmentPos]= RET; 658 } 659 xpos+=xInc; 660 } 661 if (filterCode) 662 filterPos[((i/2)+1)&(~1)]= xpos>>16; // needed to jump to the next part 663 664 return fragmentPos + 1; 665} 666#endif /* ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT) */ 667 668static void getSubSampleFactors(int *h, int *v, enum PixelFormat format) 669{ 670 *h = av_pix_fmt_descriptors[format].log2_chroma_w; 671 *v = av_pix_fmt_descriptors[format].log2_chroma_h; 672} 673 674static uint16_t roundToInt16(int64_t f) 675{ 676 int r= (f + (1<<15))>>16; 677 if (r<-0x7FFF) return 0x8000; 678 else if (r> 0x7FFF) return 0x7FFF; 679 else return r; 680} 681 682int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation) 683{ 684 int64_t crv = inv_table[0]; 685 int64_t cbu = inv_table[1]; 686 int64_t cgu = -inv_table[2]; 687 int64_t cgv = -inv_table[3]; 688 int64_t cy = 1<<16; 689 int64_t oy = 0; 690 691 memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4); 692 memcpy(c->dstColorspaceTable, table, sizeof(int)*4); 693 694 c->brightness= brightness; 695 c->contrast = contrast; 696 c->saturation= saturation; 697 c->srcRange = srcRange; 698 c->dstRange = dstRange; 699 if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1; 700 701 c->uOffset= 0x0400040004000400LL; 702 c->vOffset= 0x0400040004000400LL; 703 704 if (!srcRange) { 705 cy= (cy*255) / 219; 706 oy= 16<<16; 707 } else { 708 crv= (crv*224) / 255; 709 cbu= (cbu*224) / 255; 710 cgu= (cgu*224) / 255; 711 cgv= (cgv*224) / 255; 712 } 713 714 cy = (cy *contrast )>>16; 715 crv= (crv*contrast * saturation)>>32; 716 cbu= (cbu*contrast * saturation)>>32; 717 cgu= (cgu*contrast * saturation)>>32; 718 cgv= (cgv*contrast * saturation)>>32; 719 720 oy -= 256*brightness; 721 722 c->yCoeff= roundToInt16(cy *8192) * 0x0001000100010001ULL; 723 c->vrCoeff= roundToInt16(crv*8192) * 0x0001000100010001ULL; 724 c->ubCoeff= roundToInt16(cbu*8192) * 0x0001000100010001ULL; 725 c->vgCoeff= roundToInt16(cgv*8192) * 0x0001000100010001ULL; 726 c->ugCoeff= roundToInt16(cgu*8192) * 0x0001000100010001ULL; 727 c->yOffset= roundToInt16(oy * 8) * 0x0001000100010001ULL; 728 729 c->yuv2rgb_y_coeff = (int16_t)roundToInt16(cy <<13); 730 c->yuv2rgb_y_offset = (int16_t)roundToInt16(oy << 9); 731 c->yuv2rgb_v2r_coeff= (int16_t)roundToInt16(crv<<13); 732 c->yuv2rgb_v2g_coeff= (int16_t)roundToInt16(cgv<<13); 733 c->yuv2rgb_u2g_coeff= (int16_t)roundToInt16(cgu<<13); 734 c->yuv2rgb_u2b_coeff= (int16_t)roundToInt16(cbu<<13); 735 736 ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation); 737 //FIXME factorize 738 739#if HAVE_ALTIVEC 740 if (c->flags & SWS_CPU_CAPS_ALTIVEC) 741 ff_yuv2rgb_init_tables_altivec(c, inv_table, brightness, contrast, saturation); 742#endif 743 return 0; 744} 745 746int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation) 747{ 748 if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1; 749 750 *inv_table = c->srcColorspaceTable; 751 *table = c->dstColorspaceTable; 752 *srcRange = c->srcRange; 753 *dstRange = c->dstRange; 754 *brightness= c->brightness; 755 *contrast = c->contrast; 756 *saturation= c->saturation; 757 758 return 0; 759} 760 761static int handle_jpeg(enum PixelFormat *format) 762{ 763 switch (*format) { 764 case PIX_FMT_YUVJ420P: 765 *format = PIX_FMT_YUV420P; 766 return 1; 767 case PIX_FMT_YUVJ422P: 768 *format = PIX_FMT_YUV422P; 769 return 1; 770 case PIX_FMT_YUVJ444P: 771 *format = PIX_FMT_YUV444P; 772 return 1; 773 case PIX_FMT_YUVJ440P: 774 *format = PIX_FMT_YUV440P; 775 return 1; 776 default: 777 return 0; 778 } 779} 780 781SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat, 782 int dstW, int dstH, enum PixelFormat dstFormat, int flags, 783 SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param) 784{ 785 SwsContext *c; 786 int i; 787 int usesVFilter, usesHFilter; 788 int unscaled; 789 int srcRange, dstRange; 790 SwsFilter dummyFilter= {NULL, NULL, NULL, NULL}; 791#if ARCH_X86 792 if (flags & SWS_CPU_CAPS_MMX) 793 __asm__ volatile("emms\n\t"::: "memory"); 794#endif 795 796#if !CONFIG_RUNTIME_CPUDETECT //ensure that the flags match the compiled variant if cpudetect is off 797 flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC|SWS_CPU_CAPS_BFIN); 798 flags |= ff_hardcodedcpuflags(); 799#endif /* CONFIG_RUNTIME_CPUDETECT */ 800 if (!rgb15to16) sws_rgb2rgb_init(flags); 801 802 unscaled = (srcW == dstW && srcH == dstH); 803 804 srcRange = handle_jpeg(&srcFormat); 805 dstRange = handle_jpeg(&dstFormat); 806 807 if (!isSupportedIn(srcFormat)) { 808 av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input pixel format\n", sws_format_name(srcFormat)); 809 return NULL; 810 } 811 if (!isSupportedOut(dstFormat)) { 812 av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output pixel format\n", sws_format_name(dstFormat)); 813 return NULL; 814 } 815 816 i= flags & ( SWS_POINT 817 |SWS_AREA 818 |SWS_BILINEAR 819 |SWS_FAST_BILINEAR 820 |SWS_BICUBIC 821 |SWS_X 822 |SWS_GAUSS 823 |SWS_LANCZOS 824 |SWS_SINC 825 |SWS_SPLINE 826 |SWS_BICUBLIN); 827 if(!i || (i & (i-1))) { 828 av_log(NULL, AV_LOG_ERROR, "swScaler: Exactly one scaler algorithm must be chosen\n"); 829 return NULL; 830 } 831 832 /* sanity check */ 833 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 834 av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n", 835 srcW, srcH, dstW, dstH); 836 return NULL; 837 } 838 if(srcW > VOFW || dstW > VOFW) { 839 av_log(NULL, AV_LOG_ERROR, "swScaler: Compile-time maximum width is "AV_STRINGIFY(VOFW)" change VOF/VOFW and recompile\n"); 840 return NULL; 841 } 842 843 if (!dstFilter) dstFilter= &dummyFilter; 844 if (!srcFilter) srcFilter= &dummyFilter; 845 846 FF_ALLOCZ_OR_GOTO(NULL, c, sizeof(SwsContext), fail); 847 848 c->av_class = &sws_context_class; 849 c->srcW= srcW; 850 c->srcH= srcH; 851 c->dstW= dstW; 852 c->dstH= dstH; 853 c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW; 854 c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH; 855 c->flags= flags; 856 c->dstFormat= dstFormat; 857 c->srcFormat= srcFormat; 858 c->dstFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[dstFormat]); 859 c->srcFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[srcFormat]); 860 c->vRounder= 4* 0x0001000100010001ULL; 861 862 usesVFilter = (srcFilter->lumV && srcFilter->lumV->length>1) || 863 (srcFilter->chrV && srcFilter->chrV->length>1) || 864 (dstFilter->lumV && dstFilter->lumV->length>1) || 865 (dstFilter->chrV && dstFilter->chrV->length>1); 866 usesHFilter = (srcFilter->lumH && srcFilter->lumH->length>1) || 867 (srcFilter->chrH && srcFilter->chrH->length>1) || 868 (dstFilter->lumH && dstFilter->lumH->length>1) || 869 (dstFilter->chrH && dstFilter->chrH->length>1); 870 871 getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat); 872 getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat); 873 874 // reuse chroma for 2 pixels RGB/BGR unless user wants full chroma interpolation 875 if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1; 876 877 // drop some chroma lines if the user wants it 878 c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT; 879 c->chrSrcVSubSample+= c->vChrDrop; 880 881 // drop every other pixel for chroma calculation unless user wants full chroma 882 if (isAnyRGB(srcFormat) && !(flags&SWS_FULL_CHR_H_INP) 883 && srcFormat!=PIX_FMT_RGB8 && srcFormat!=PIX_FMT_BGR8 884 && srcFormat!=PIX_FMT_RGB4 && srcFormat!=PIX_FMT_BGR4 885 && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE 886 && ((dstW>>c->chrDstHSubSample) <= (srcW>>1) || (flags&(SWS_FAST_BILINEAR|SWS_POINT)))) 887 c->chrSrcHSubSample=1; 888 889 if (param) { 890 c->param[0] = param[0]; 891 c->param[1] = param[1]; 892 } else { 893 c->param[0] = 894 c->param[1] = SWS_PARAM_DEFAULT; 895 } 896 897 // Note the -((-x)>>y) is so that we always round toward +inf. 898 c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample); 899 c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample); 900 c->chrDstW= -((-dstW) >> c->chrDstHSubSample); 901 c->chrDstH= -((-dstH) >> c->chrDstVSubSample); 902 903 sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], srcRange, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT] /* FIXME*/, dstRange, 0, 1<<16, 1<<16); 904 905 /* unscaled special cases */ 906 if (unscaled && !usesHFilter && !usesVFilter && (srcRange == dstRange || isAnyRGB(dstFormat))) { 907 ff_get_unscaled_swscale(c); 908 909 if (c->swScale) { 910 if (flags&SWS_PRINT_INFO) 911 av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n", 912 sws_format_name(srcFormat), sws_format_name(dstFormat)); 913 return c; 914 } 915 } 916 917 if (flags & SWS_CPU_CAPS_MMX2) { 918 c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0; 919 if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR)) { 920 if (flags&SWS_PRINT_INFO) 921 av_log(c, AV_LOG_INFO, "output width is not a multiple of 32 -> no MMX2 scaler\n"); 922 } 923 if (usesHFilter) c->canMMX2BeUsed=0; 924 } 925 else 926 c->canMMX2BeUsed=0; 927 928 c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW; 929 c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH; 930 931 // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst 932 // but only for the FAST_BILINEAR mode otherwise do correct scaling 933 // n-2 is the last chrominance sample available 934 // this is not perfect, but no one should notice the difference, the more correct variant 935 // would be like the vertical one, but that would require some special code for the 936 // first and last pixel 937 if (flags&SWS_FAST_BILINEAR) { 938 if (c->canMMX2BeUsed) { 939 c->lumXInc+= 20; 940 c->chrXInc+= 20; 941 } 942 //we don't use the x86 asm scaler if MMX is available 943 else if (flags & SWS_CPU_CAPS_MMX) { 944 c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20; 945 c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20; 946 } 947 } 948 949 /* precalculate horizontal scaler filter coefficients */ 950 { 951#if ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT) 952// can't downscale !!! 953 if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR)) { 954 c->lumMmx2FilterCodeSize = initMMX2HScaler( dstW, c->lumXInc, NULL, NULL, NULL, 8); 955 c->chrMmx2FilterCodeSize = initMMX2HScaler(c->chrDstW, c->chrXInc, NULL, NULL, NULL, 4); 956 957#ifdef MAP_ANONYMOUS 958 c->lumMmx2FilterCode = mmap(NULL, c->lumMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0); 959 c->chrMmx2FilterCode = mmap(NULL, c->chrMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0); 960#elif HAVE_VIRTUALALLOC 961 c->lumMmx2FilterCode = VirtualAlloc(NULL, c->lumMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE); 962 c->chrMmx2FilterCode = VirtualAlloc(NULL, c->chrMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE); 963#else 964 c->lumMmx2FilterCode = av_malloc(c->lumMmx2FilterCodeSize); 965 c->chrMmx2FilterCode = av_malloc(c->chrMmx2FilterCodeSize); 966#endif 967 968 if (!c->lumMmx2FilterCode || !c->chrMmx2FilterCode) 969 goto fail; 970 FF_ALLOCZ_OR_GOTO(c, c->hLumFilter , (dstW /8+8)*sizeof(int16_t), fail); 971 FF_ALLOCZ_OR_GOTO(c, c->hChrFilter , (c->chrDstW /4+8)*sizeof(int16_t), fail); 972 FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW /2/8+8)*sizeof(int32_t), fail); 973 FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW/2/4+8)*sizeof(int32_t), fail); 974 975 initMMX2HScaler( dstW, c->lumXInc, c->lumMmx2FilterCode, c->hLumFilter, c->hLumFilterPos, 8); 976 initMMX2HScaler(c->chrDstW, c->chrXInc, c->chrMmx2FilterCode, c->hChrFilter, c->hChrFilterPos, 4); 977 978#ifdef MAP_ANONYMOUS 979 mprotect(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize, PROT_EXEC | PROT_READ); 980 mprotect(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize, PROT_EXEC | PROT_READ); 981#endif 982 } else 983#endif /* ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT) */ 984 { 985 const int filterAlign= 986 (flags & SWS_CPU_CAPS_MMX) ? 4 : 987 (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 : 988 1; 989 990 if (initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc, 991 srcW , dstW, filterAlign, 1<<14, 992 (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags, 993 srcFilter->lumH, dstFilter->lumH, c->param) < 0) 994 goto fail; 995 if (initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc, 996 c->chrSrcW, c->chrDstW, filterAlign, 1<<14, 997 (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags, 998 srcFilter->chrH, dstFilter->chrH, c->param) < 0) 999 goto fail; 1000 } 1001 } // initialize horizontal stuff 1002 1003 /* precalculate vertical scaler filter coefficients */ 1004 { 1005 const int filterAlign= 1006 (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 : 1007 (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 : 1008 1; 1009 1010 if (initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc, 1011 srcH , dstH, filterAlign, (1<<12), 1012 (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags, 1013 srcFilter->lumV, dstFilter->lumV, c->param) < 0) 1014 goto fail; 1015 if (initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc, 1016 c->chrSrcH, c->chrDstH, filterAlign, (1<<12), 1017 (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags, 1018 srcFilter->chrV, dstFilter->chrV, c->param) < 0) 1019 goto fail; 1020 1021#if HAVE_ALTIVEC 1022 FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof (vector signed short)*c->vLumFilterSize*c->dstH, fail); 1023 FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH, fail); 1024 1025 for (i=0;i<c->vLumFilterSize*c->dstH;i++) { 1026 int j; 1027 short *p = (short *)&c->vYCoeffsBank[i]; 1028 for (j=0;j<8;j++) 1029 p[j] = c->vLumFilter[i]; 1030 } 1031 1032 for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) { 1033 int j; 1034 short *p = (short *)&c->vCCoeffsBank[i]; 1035 for (j=0;j<8;j++) 1036 p[j] = c->vChrFilter[i]; 1037 } 1038#endif 1039 } 1040 1041 // calculate buffer sizes so that they won't run out while handling these damn slices 1042 c->vLumBufSize= c->vLumFilterSize; 1043 c->vChrBufSize= c->vChrFilterSize; 1044 for (i=0; i<dstH; i++) { 1045 int chrI= i*c->chrDstH / dstH; 1046 int nextSlice= FFMAX(c->vLumFilterPos[i ] + c->vLumFilterSize - 1, 1047 ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample)); 1048 1049 nextSlice>>= c->chrSrcVSubSample; 1050 nextSlice<<= c->chrSrcVSubSample; 1051 if (c->vLumFilterPos[i ] + c->vLumBufSize < nextSlice) 1052 c->vLumBufSize= nextSlice - c->vLumFilterPos[i]; 1053 if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample)) 1054 c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI]; 1055 } 1056 1057 // allocate pixbufs (we use dynamic allocation because otherwise we would need to 1058 // allocate several megabytes to handle all possible cases) 1059 FF_ALLOC_OR_GOTO(c, c->lumPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail); 1060 FF_ALLOC_OR_GOTO(c, c->chrPixBuf, c->vChrBufSize*2*sizeof(int16_t*), fail); 1061 if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) 1062 FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail); 1063 //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) 1064 /* align at 16 bytes for AltiVec */ 1065 for (i=0; i<c->vLumBufSize; i++) { 1066 FF_ALLOCZ_OR_GOTO(c, c->lumPixBuf[i+c->vLumBufSize], VOF+1, fail); 1067 c->lumPixBuf[i] = c->lumPixBuf[i+c->vLumBufSize]; 1068 } 1069 for (i=0; i<c->vChrBufSize; i++) { 1070 FF_ALLOC_OR_GOTO(c, c->chrPixBuf[i+c->vChrBufSize], (VOF+1)*2, fail); 1071 c->chrPixBuf[i] = c->chrPixBuf[i+c->vChrBufSize]; 1072 } 1073 if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) 1074 for (i=0; i<c->vLumBufSize; i++) { 1075 FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf[i+c->vLumBufSize], VOF+1, fail); 1076 c->alpPixBuf[i] = c->alpPixBuf[i+c->vLumBufSize]; 1077 } 1078 1079 //try to avoid drawing green stuff between the right end and the stride end 1080 for (i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, (VOF+1)*2); 1081 1082 assert(2*VOFW == VOF); 1083 1084 assert(c->chrDstH <= dstH); 1085 1086 if (flags&SWS_PRINT_INFO) { 1087 if (flags&SWS_FAST_BILINEAR) 1088 av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, "); 1089 else if (flags&SWS_BILINEAR) 1090 av_log(c, AV_LOG_INFO, "BILINEAR scaler, "); 1091 else if (flags&SWS_BICUBIC) 1092 av_log(c, AV_LOG_INFO, "BICUBIC scaler, "); 1093 else if (flags&SWS_X) 1094 av_log(c, AV_LOG_INFO, "Experimental scaler, "); 1095 else if (flags&SWS_POINT) 1096 av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, "); 1097 else if (flags&SWS_AREA) 1098 av_log(c, AV_LOG_INFO, "Area Averaging scaler, "); 1099 else if (flags&SWS_BICUBLIN) 1100 av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, "); 1101 else if (flags&SWS_GAUSS) 1102 av_log(c, AV_LOG_INFO, "Gaussian scaler, "); 1103 else if (flags&SWS_SINC) 1104 av_log(c, AV_LOG_INFO, "Sinc scaler, "); 1105 else if (flags&SWS_LANCZOS) 1106 av_log(c, AV_LOG_INFO, "Lanczos scaler, "); 1107 else if (flags&SWS_SPLINE) 1108 av_log(c, AV_LOG_INFO, "Bicubic spline scaler, "); 1109 else 1110 av_log(c, AV_LOG_INFO, "ehh flags invalid?! "); 1111 1112 av_log(c, AV_LOG_INFO, "from %s to %s%s ", 1113 sws_format_name(srcFormat), 1114#ifdef DITHER1XBPP 1115 dstFormat == PIX_FMT_BGR555 || dstFormat == PIX_FMT_BGR565 || 1116 dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE || 1117 dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE ? "dithered " : "", 1118#else 1119 "", 1120#endif 1121 sws_format_name(dstFormat)); 1122 1123 if (flags & SWS_CPU_CAPS_MMX2) 1124 av_log(c, AV_LOG_INFO, "using MMX2\n"); 1125 else if (flags & SWS_CPU_CAPS_3DNOW) 1126 av_log(c, AV_LOG_INFO, "using 3DNOW\n"); 1127 else if (flags & SWS_CPU_CAPS_MMX) 1128 av_log(c, AV_LOG_INFO, "using MMX\n"); 1129 else if (flags & SWS_CPU_CAPS_ALTIVEC) 1130 av_log(c, AV_LOG_INFO, "using AltiVec\n"); 1131 else 1132 av_log(c, AV_LOG_INFO, "using C\n"); 1133 1134 if (flags & SWS_CPU_CAPS_MMX) { 1135 if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR)) 1136 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR MMX2 scaler for horizontal scaling\n"); 1137 else { 1138 if (c->hLumFilterSize==4) 1139 av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal luminance scaling\n"); 1140 else if (c->hLumFilterSize==8) 1141 av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal luminance scaling\n"); 1142 else 1143 av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal luminance scaling\n"); 1144 1145 if (c->hChrFilterSize==4) 1146 av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal chrominance scaling\n"); 1147 else if (c->hChrFilterSize==8) 1148 av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal chrominance scaling\n"); 1149 else 1150 av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal chrominance scaling\n"); 1151 } 1152 } else { 1153#if ARCH_X86 1154 av_log(c, AV_LOG_VERBOSE, "using x86 asm scaler for horizontal scaling\n"); 1155#else 1156 if (flags & SWS_FAST_BILINEAR) 1157 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR C scaler for horizontal scaling\n"); 1158 else 1159 av_log(c, AV_LOG_VERBOSE, "using C scaler for horizontal scaling\n"); 1160#endif 1161 } 1162 if (isPlanarYUV(dstFormat)) { 1163 if (c->vLumFilterSize==1) 1164 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"); 1165 else 1166 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"); 1167 } else { 1168 if (c->vLumFilterSize==1 && c->vChrFilterSize==2) 1169 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n" 1170 " 2-tap scaler for vertical chrominance scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"); 1171 else if (c->vLumFilterSize==2 && c->vChrFilterSize==2) 1172 av_log(c, AV_LOG_VERBOSE, "using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"); 1173 else 1174 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"); 1175 } 1176 1177 if (dstFormat==PIX_FMT_BGR24) 1178 av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR24 converter\n", 1179 (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C")); 1180 else if (dstFormat==PIX_FMT_RGB32) 1181 av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR32 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"); 1182 else if (dstFormat==PIX_FMT_BGR565) 1183 av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"); 1184 else if (dstFormat==PIX_FMT_BGR555) 1185 av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"); 1186 else if (dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE || 1187 dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE) 1188 av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR12 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"); 1189 1190 av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH); 1191 av_log(c, AV_LOG_DEBUG, "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n", 1192 c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc); 1193 av_log(c, AV_LOG_DEBUG, "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n", 1194 c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc); 1195 } 1196 1197 c->swScale= ff_getSwsFunc(c); 1198 return c; 1199 1200fail: 1201 sws_freeContext(c); 1202 return NULL; 1203} 1204 1205SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur, 1206 float lumaSharpen, float chromaSharpen, 1207 float chromaHShift, float chromaVShift, 1208 int verbose) 1209{ 1210 SwsFilter *filter= av_malloc(sizeof(SwsFilter)); 1211 if (!filter) 1212 return NULL; 1213 1214 if (lumaGBlur!=0.0) { 1215 filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0); 1216 filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0); 1217 } else { 1218 filter->lumH= sws_getIdentityVec(); 1219 filter->lumV= sws_getIdentityVec(); 1220 } 1221 1222 if (chromaGBlur!=0.0) { 1223 filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0); 1224 filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0); 1225 } else { 1226 filter->chrH= sws_getIdentityVec(); 1227 filter->chrV= sws_getIdentityVec(); 1228 } 1229 1230 if (chromaSharpen!=0.0) { 1231 SwsVector *id= sws_getIdentityVec(); 1232 sws_scaleVec(filter->chrH, -chromaSharpen); 1233 sws_scaleVec(filter->chrV, -chromaSharpen); 1234 sws_addVec(filter->chrH, id); 1235 sws_addVec(filter->chrV, id); 1236 sws_freeVec(id); 1237 } 1238 1239 if (lumaSharpen!=0.0) { 1240 SwsVector *id= sws_getIdentityVec(); 1241 sws_scaleVec(filter->lumH, -lumaSharpen); 1242 sws_scaleVec(filter->lumV, -lumaSharpen); 1243 sws_addVec(filter->lumH, id); 1244 sws_addVec(filter->lumV, id); 1245 sws_freeVec(id); 1246 } 1247 1248 if (chromaHShift != 0.0) 1249 sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5)); 1250 1251 if (chromaVShift != 0.0) 1252 sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5)); 1253 1254 sws_normalizeVec(filter->chrH, 1.0); 1255 sws_normalizeVec(filter->chrV, 1.0); 1256 sws_normalizeVec(filter->lumH, 1.0); 1257 sws_normalizeVec(filter->lumV, 1.0); 1258 1259 if (verbose) sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG); 1260 if (verbose) sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG); 1261 1262 return filter; 1263} 1264 1265SwsVector *sws_allocVec(int length) 1266{ 1267 SwsVector *vec = av_malloc(sizeof(SwsVector)); 1268 if (!vec) 1269 return NULL; 1270 vec->length = length; 1271 vec->coeff = av_malloc(sizeof(double) * length); 1272 if (!vec->coeff) 1273 av_freep(&vec); 1274 return vec; 1275} 1276 1277SwsVector *sws_getGaussianVec(double variance, double quality) 1278{ 1279 const int length= (int)(variance*quality + 0.5) | 1; 1280 int i; 1281 double middle= (length-1)*0.5; 1282 SwsVector *vec= sws_allocVec(length); 1283 1284 if (!vec) 1285 return NULL; 1286 1287 for (i=0; i<length; i++) { 1288 double dist= i-middle; 1289 vec->coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*M_PI); 1290 } 1291 1292 sws_normalizeVec(vec, 1.0); 1293 1294 return vec; 1295} 1296 1297SwsVector *sws_getConstVec(double c, int length) 1298{ 1299 int i; 1300 SwsVector *vec= sws_allocVec(length); 1301 1302 if (!vec) 1303 return NULL; 1304 1305 for (i=0; i<length; i++) 1306 vec->coeff[i]= c; 1307 1308 return vec; 1309} 1310 1311SwsVector *sws_getIdentityVec(void) 1312{ 1313 return sws_getConstVec(1.0, 1); 1314} 1315 1316static double sws_dcVec(SwsVector *a) 1317{ 1318 int i; 1319 double sum=0; 1320 1321 for (i=0; i<a->length; i++) 1322 sum+= a->coeff[i]; 1323 1324 return sum; 1325} 1326 1327void sws_scaleVec(SwsVector *a, double scalar) 1328{ 1329 int i; 1330 1331 for (i=0; i<a->length; i++) 1332 a->coeff[i]*= scalar; 1333} 1334 1335void sws_normalizeVec(SwsVector *a, double height) 1336{ 1337 sws_scaleVec(a, height/sws_dcVec(a)); 1338} 1339 1340static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b) 1341{ 1342 int length= a->length + b->length - 1; 1343 int i, j; 1344 SwsVector *vec= sws_getConstVec(0.0, length); 1345 1346 if (!vec) 1347 return NULL; 1348 1349 for (i=0; i<a->length; i++) { 1350 for (j=0; j<b->length; j++) { 1351 vec->coeff[i+j]+= a->coeff[i]*b->coeff[j]; 1352 } 1353 } 1354 1355 return vec; 1356} 1357 1358static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b) 1359{ 1360 int length= FFMAX(a->length, b->length); 1361 int i; 1362 SwsVector *vec= sws_getConstVec(0.0, length); 1363 1364 if (!vec) 1365 return NULL; 1366 1367 for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i]; 1368 for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i]; 1369 1370 return vec; 1371} 1372 1373static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b) 1374{ 1375 int length= FFMAX(a->length, b->length); 1376 int i; 1377 SwsVector *vec= sws_getConstVec(0.0, length); 1378 1379 if (!vec) 1380 return NULL; 1381 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]; 1384 1385 return vec; 1386} 1387 1388/* shift left / or right if "shift" is negative */ 1389static SwsVector *sws_getShiftedVec(SwsVector *a, int shift) 1390{ 1391 int length= a->length + FFABS(shift)*2; 1392 int i; 1393 SwsVector *vec= sws_getConstVec(0.0, length); 1394 1395 if (!vec) 1396 return NULL; 1397 1398 for (i=0; i<a->length; i++) { 1399 vec->coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i]; 1400 } 1401 1402 return vec; 1403} 1404 1405void sws_shiftVec(SwsVector *a, int shift) 1406{ 1407 SwsVector *shifted= sws_getShiftedVec(a, shift); 1408 av_free(a->coeff); 1409 a->coeff= shifted->coeff; 1410 a->length= shifted->length; 1411 av_free(shifted); 1412} 1413 1414void sws_addVec(SwsVector *a, SwsVector *b) 1415{ 1416 SwsVector *sum= sws_sumVec(a, b); 1417 av_free(a->coeff); 1418 a->coeff= sum->coeff; 1419 a->length= sum->length; 1420 av_free(sum); 1421} 1422 1423void sws_subVec(SwsVector *a, SwsVector *b) 1424{ 1425 SwsVector *diff= sws_diffVec(a, b); 1426 av_free(a->coeff); 1427 a->coeff= diff->coeff; 1428 a->length= diff->length; 1429 av_free(diff); 1430} 1431 1432void sws_convVec(SwsVector *a, SwsVector *b) 1433{ 1434 SwsVector *conv= sws_getConvVec(a, b); 1435 av_free(a->coeff); 1436 a->coeff= conv->coeff; 1437 a->length= conv->length; 1438 av_free(conv); 1439} 1440 1441SwsVector *sws_cloneVec(SwsVector *a) 1442{ 1443 int i; 1444 SwsVector *vec= sws_allocVec(a->length); 1445 1446 if (!vec) 1447 return NULL; 1448 1449 for (i=0; i<a->length; i++) vec->coeff[i]= a->coeff[i]; 1450 1451 return vec; 1452} 1453 1454void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level) 1455{ 1456 int i; 1457 double max=0; 1458 double min=0; 1459 double range; 1460 1461 for (i=0; i<a->length; i++) 1462 if (a->coeff[i]>max) max= a->coeff[i]; 1463 1464 for (i=0; i<a->length; i++) 1465 if (a->coeff[i]<min) min= a->coeff[i]; 1466 1467 range= max - min; 1468 1469 for (i=0; i<a->length; i++) { 1470 int x= (int)((a->coeff[i]-min)*60.0/range +0.5); 1471 av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]); 1472 for (;x>0; x--) av_log(log_ctx, log_level, " "); 1473 av_log(log_ctx, log_level, "|\n"); 1474 } 1475} 1476 1477#if LIBSWSCALE_VERSION_MAJOR < 1 1478void sws_printVec(SwsVector *a) 1479{ 1480 sws_printVec2(a, NULL, AV_LOG_DEBUG); 1481} 1482#endif 1483 1484void sws_freeVec(SwsVector *a) 1485{ 1486 if (!a) return; 1487 av_freep(&a->coeff); 1488 a->length=0; 1489 av_free(a); 1490} 1491 1492void sws_freeFilter(SwsFilter *filter) 1493{ 1494 if (!filter) return; 1495 1496 if (filter->lumH) sws_freeVec(filter->lumH); 1497 if (filter->lumV) sws_freeVec(filter->lumV); 1498 if (filter->chrH) sws_freeVec(filter->chrH); 1499 if (filter->chrV) sws_freeVec(filter->chrV); 1500 av_free(filter); 1501} 1502 1503void sws_freeContext(SwsContext *c) 1504{ 1505 int i; 1506 if (!c) return; 1507 1508 if (c->lumPixBuf) { 1509 for (i=0; i<c->vLumBufSize; i++) 1510 av_freep(&c->lumPixBuf[i]); 1511 av_freep(&c->lumPixBuf); 1512 } 1513 1514 if (c->chrPixBuf) { 1515 for (i=0; i<c->vChrBufSize; i++) 1516 av_freep(&c->chrPixBuf[i]); 1517 av_freep(&c->chrPixBuf); 1518 } 1519 1520 if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) { 1521 for (i=0; i<c->vLumBufSize; i++) 1522 av_freep(&c->alpPixBuf[i]); 1523 av_freep(&c->alpPixBuf); 1524 } 1525 1526 av_freep(&c->vLumFilter); 1527 av_freep(&c->vChrFilter); 1528 av_freep(&c->hLumFilter); 1529 av_freep(&c->hChrFilter); 1530#if HAVE_ALTIVEC 1531 av_freep(&c->vYCoeffsBank); 1532 av_freep(&c->vCCoeffsBank); 1533#endif 1534 1535 av_freep(&c->vLumFilterPos); 1536 av_freep(&c->vChrFilterPos); 1537 av_freep(&c->hLumFilterPos); 1538 av_freep(&c->hChrFilterPos); 1539 1540#if ARCH_X86 1541#ifdef MAP_ANONYMOUS 1542 if (c->lumMmx2FilterCode) munmap(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize); 1543 if (c->chrMmx2FilterCode) munmap(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize); 1544#elif HAVE_VIRTUALALLOC 1545 if (c->lumMmx2FilterCode) VirtualFree(c->lumMmx2FilterCode, 0, MEM_RELEASE); 1546 if (c->chrMmx2FilterCode) VirtualFree(c->chrMmx2FilterCode, 0, MEM_RELEASE); 1547#else 1548 av_free(c->lumMmx2FilterCode); 1549 av_free(c->chrMmx2FilterCode); 1550#endif 1551 c->lumMmx2FilterCode=NULL; 1552 c->chrMmx2FilterCode=NULL; 1553#endif /* ARCH_X86 */ 1554 1555 av_freep(&c->yuvTable); 1556 1557 av_free(c); 1558} 1559 1560struct SwsContext *sws_getCachedContext(struct SwsContext *context, 1561 int srcW, int srcH, enum PixelFormat srcFormat, 1562 int dstW, int dstH, enum PixelFormat dstFormat, int flags, 1563 SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param) 1564{ 1565 static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT}; 1566 1567 if (!param) 1568 param = default_param; 1569 1570 if (context && 1571 (context->srcW != srcW || 1572 context->srcH != srcH || 1573 context->srcFormat != srcFormat || 1574 context->dstW != dstW || 1575 context->dstH != dstH || 1576 context->dstFormat != dstFormat || 1577 context->flags != flags || 1578 context->param[0] != param[0] || 1579 context->param[1] != param[1])) { 1580 sws_freeContext(context); 1581 context = NULL; 1582 } 1583 1584 if (!context) { 1585 return sws_getContext(srcW, srcH, srcFormat, 1586 dstW, dstH, dstFormat, flags, 1587 srcFilter, dstFilter, param); 1588 } 1589 return context; 1590} 1591 1592