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FFmpeg/libswscale/utils.c

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  1. /*

  2.  * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>

  3.  *

  4.  * This file is part of Libav.

  5.  *

  6.  * Libav 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.  * Libav 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 Libav; 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/cpu.h"

  44. #include "libavutil/avutil.h"

  45. #include "libavutil/bswap.h"

  46. #include "libavutil/mathematics.h"

  47. #include "libavutil/opt.h"

  48. #include "libavutil/pixdesc.h"

  49. 

  50. unsigned swscale_version(void)

  51. {

  52.     return LIBSWSCALE_VERSION_INT;

  53. }

  54. 

  55. const char *swscale_configuration(void)

  56. {

  57.     return LIBAV_CONFIGURATION;

  58. }

  59. 

  60. const char *swscale_license(void)

  61. {

  62. #define LICENSE_PREFIX "libswscale license: "

  63.     return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;

  64. }

  65. 

  66. #define RET 0xC3 //near return opcode for x86

  67. 

  68. typedef struct FormatEntry {

  69.     int is_supported_in, is_supported_out;

  70. } FormatEntry;

  71. 

  72. static const FormatEntry format_entries[PIX_FMT_NB] = {

  73.     [PIX_FMT_YUV420P]     = { 1 , 1 },

  74.     [PIX_FMT_YUYV422]     = { 1 , 1 },

  75.     [PIX_FMT_RGB24]       = { 1 , 1 },

  76.     [PIX_FMT_BGR24]       = { 1 , 1 },

  77.     [PIX_FMT_YUV422P]     = { 1 , 1 },

  78.     [PIX_FMT_YUV444P]     = { 1 , 1 },

  79.     [PIX_FMT_YUV410P]     = { 1 , 1 },

  80.     [PIX_FMT_YUV411P]     = { 1 , 1 },

  81.     [PIX_FMT_GRAY8]       = { 1 , 1 },

  82.     [PIX_FMT_MONOWHITE]   = { 1 , 1 },

  83.     [PIX_FMT_MONOBLACK]   = { 1 , 1 },

  84.     [PIX_FMT_PAL8]        = { 1 , 0 },

  85.     [PIX_FMT_YUVJ420P]    = { 1 , 1 },

  86.     [PIX_FMT_YUVJ422P]    = { 1 , 1 },

  87.     [PIX_FMT_YUVJ444P]    = { 1 , 1 },

  88.     [PIX_FMT_UYVY422]     = { 1 , 1 },

  89.     [PIX_FMT_UYYVYY411]   = { 0 , 0 },

  90.     [PIX_FMT_BGR8]        = { 1 , 1 },

  91.     [PIX_FMT_BGR4]        = { 0 , 1 },

  92.     [PIX_FMT_BGR4_BYTE]   = { 1 , 1 },

  93.     [PIX_FMT_RGB8]        = { 1 , 1 },

  94.     [PIX_FMT_RGB4]        = { 0 , 1 },

  95.     [PIX_FMT_RGB4_BYTE]   = { 1 , 1 },

  96.     [PIX_FMT_NV12]        = { 1 , 1 },

  97.     [PIX_FMT_NV21]        = { 1 , 1 },

  98.     [PIX_FMT_ARGB]        = { 1 , 1 },

  99.     [PIX_FMT_RGBA]        = { 1 , 1 },

  100.     [PIX_FMT_ABGR]        = { 1 , 1 },

  101.     [PIX_FMT_BGRA]        = { 1 , 1 },

  102.     [PIX_FMT_GRAY16BE]    = { 1 , 1 },

  103.     [PIX_FMT_GRAY16LE]    = { 1 , 1 },

  104.     [PIX_FMT_YUV440P]     = { 1 , 1 },

  105.     [PIX_FMT_YUVJ440P]    = { 1 , 1 },

  106.     [PIX_FMT_YUVA420P]    = { 1 , 1 },

  107.     [PIX_FMT_RGB48BE]     = { 1 , 1 },

  108.     [PIX_FMT_RGB48LE]     = { 1 , 1 },

  109.     [PIX_FMT_RGB565BE]    = { 1 , 1 },

  110.     [PIX_FMT_RGB565LE]    = { 1 , 1 },

  111.     [PIX_FMT_RGB555BE]    = { 1 , 1 },

  112.     [PIX_FMT_RGB555LE]    = { 1 , 1 },

  113.     [PIX_FMT_BGR565BE]    = { 1 , 1 },

  114.     [PIX_FMT_BGR565LE]    = { 1 , 1 },

  115.     [PIX_FMT_BGR555BE]    = { 1 , 1 },

  116.     [PIX_FMT_BGR555LE]    = { 1 , 1 },

  117.     [PIX_FMT_YUV420P16LE] = { 1 , 1 },

  118.     [PIX_FMT_YUV420P16BE] = { 1 , 1 },

  119.     [PIX_FMT_YUV422P16LE] = { 1 , 1 },

  120.     [PIX_FMT_YUV422P16BE] = { 1 , 1 },

  121.     [PIX_FMT_YUV444P16LE] = { 1 , 1 },

  122.     [PIX_FMT_YUV444P16BE] = { 1 , 1 },

  123.     [PIX_FMT_RGB444LE]    = { 1 , 1 },

  124.     [PIX_FMT_RGB444BE]    = { 1 , 1 },

  125.     [PIX_FMT_BGR444LE]    = { 1 , 1 },

  126.     [PIX_FMT_BGR444BE]    = { 1 , 1 },

  127.     [PIX_FMT_Y400A]       = { 1 , 0 },

  128.     [PIX_FMT_BGR48BE]     = { 1 , 1 },

  129.     [PIX_FMT_BGR48LE]     = { 1 , 1 },

  130.     [PIX_FMT_YUV420P9BE]  = { 1 , 1 },

  131.     [PIX_FMT_YUV420P9LE]  = { 1 , 1 },

  132.     [PIX_FMT_YUV420P10BE] = { 1 , 1 },

  133.     [PIX_FMT_YUV420P10LE] = { 1 , 1 },

  134.     [PIX_FMT_YUV422P9BE]  = { 1 , 1 },

  135.     [PIX_FMT_YUV422P9LE]  = { 1 , 1 },

  136.     [PIX_FMT_YUV422P10BE] = { 1 , 1 },

  137.     [PIX_FMT_YUV422P10LE] = { 1 , 1 },

  138.     [PIX_FMT_YUV444P9BE]  = { 1 , 1 },

  139.     [PIX_FMT_YUV444P9LE]  = { 1 , 1 },

  140.     [PIX_FMT_YUV444P10BE] = { 1 , 1 },

  141.     [PIX_FMT_YUV444P10LE] = { 1 , 1 },

  142.     [PIX_FMT_GBRP]        = { 1 , 0 },

  143.     [PIX_FMT_GBRP9LE]     = { 1 , 0 },

  144.     [PIX_FMT_GBRP9BE]     = { 1 , 0 },

  145.     [PIX_FMT_GBRP10LE]    = { 1 , 0 },

  146.     [PIX_FMT_GBRP10BE]    = { 1 , 0 },

  147.     [PIX_FMT_GBRP16LE]    = { 1 , 0 },

  148.     [PIX_FMT_GBRP16BE]    = { 1 , 0 },

  149. };

  150. 

  151. int sws_isSupportedInput(enum PixelFormat pix_fmt)

  152. {

  153.     return (unsigned)pix_fmt < PIX_FMT_NB ?

  154.         format_entries[pix_fmt].is_supported_in : 0;

  155. }

  156. 

  157. int sws_isSupportedOutput(enum PixelFormat pix_fmt)

  158. {

  159.     return (unsigned)pix_fmt < PIX_FMT_NB ?

  160.         format_entries[pix_fmt].is_supported_out : 0;

  161. }

  162. 

  163. extern const int32_t ff_yuv2rgb_coeffs[8][4];

  164. 

  165. const char *sws_format_name(enum PixelFormat format)

  166. {

  167.     if ((unsigned)format < PIX_FMT_NB && av_pix_fmt_descriptors[format].name)

  168.         return av_pix_fmt_descriptors[format].name;

  169.     else

  170.         return "Unknown format";

  171. }

  172. 

  173. static double getSplineCoeff(double a, double b, double c, double d, double dist)

  174. {

  175.     if (dist<=1.0) return ((d*dist + c)*dist + b)*dist +a;

  176.     else           return getSplineCoeff(        0.0,

  177.                                           b+ 2.0*c + 3.0*d,

  178.                                                  c + 3.0*d,

  179.                                          -b- 3.0*c - 6.0*d,

  180.                                          dist-1.0);

  181. }

  182. 

  183. static int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,

  184.                       int srcW, int dstW, int filterAlign, int one, int flags, int cpu_flags,

  185.                       SwsVector *srcFilter, SwsVector *dstFilter, double param[2], int is_horizontal)

  186. {

  187.     int i;

  188.     int filterSize;

  189.     int filter2Size;

  190.     int minFilterSize;

  191.     int64_t *filter=NULL;

  192.     int64_t *filter2=NULL;

  193.     const int64_t fone= 1LL<<54;

  194.     int ret= -1;

  195. 

  196.     emms_c(); //FIXME this should not be required but it IS (even for non-MMX versions)

  197. 

  198.     // NOTE: the +3 is for the MMX(+1)/SSE(+3) scaler which reads over the end

  199.     FF_ALLOC_OR_GOTO(NULL, *filterPos, (dstW+3)*sizeof(int16_t), fail);

  200. 

  201.     if (FFABS(xInc - 0x10000) <10) { // unscaled

  202.         int i;

  203.         filterSize= 1;

  204.         FF_ALLOCZ_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);

  205. 

  206.         for (i=0; i<dstW; i++) {

  207.             filter[i*filterSize]= fone;

  208.             (*filterPos)[i]=i;

  209.         }

  210. 

  211.     } else if (flags&SWS_POINT) { // lame looking point sampling mode

  212.         int i;

  213.         int xDstInSrc;

  214.         filterSize= 1;

  215.         FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);

  216. 

  217.         xDstInSrc= xInc/2 - 0x8000;

  218.         for (i=0; i<dstW; i++) {

  219.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  220. 

  221.             (*filterPos)[i]= xx;

  222.             filter[i]= fone;

  223.             xDstInSrc+= xInc;

  224.         }

  225.     } else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) { // bilinear upscale

  226.         int i;

  227.         int xDstInSrc;

  228.         filterSize= 2;

  229.         FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);

  230. 

  231.         xDstInSrc= xInc/2 - 0x8000;

  232.         for (i=0; i<dstW; i++) {

  233.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  234.             int j;

  235. 

  236.             (*filterPos)[i]= xx;

  237.             //bilinear upscale / linear interpolate / area averaging

  238.             for (j=0; j<filterSize; j++) {

  239.                 int64_t coeff= fone - FFABS((xx<<16) - xDstInSrc)*(fone>>16);

  240.                 if (coeff<0) coeff=0;

  241.                 filter[i*filterSize + j]= coeff;

  242.                 xx++;

  243.             }

  244.             xDstInSrc+= xInc;

  245.         }

  246.     } else {

  247.         int xDstInSrc;

  248.         int sizeFactor;

  249. 

  250.         if      (flags&SWS_BICUBIC)      sizeFactor=  4;

  251.         else if (flags&SWS_X)            sizeFactor=  8;

  252.         else if (flags&SWS_AREA)         sizeFactor=  1; //downscale only, for upscale it is bilinear

  253.         else if (flags&SWS_GAUSS)        sizeFactor=  8;   // infinite ;)

  254.         else if (flags&SWS_LANCZOS)      sizeFactor= param[0] != SWS_PARAM_DEFAULT ? ceil(2*param[0]) : 6;

  255.         else if (flags&SWS_SINC)         sizeFactor= 20; // infinite ;)

  256.         else if (flags&SWS_SPLINE)       sizeFactor= 20;  // infinite ;)

  257.         else if (flags&SWS_BILINEAR)     sizeFactor=  2;

  258.         else {

  259.             sizeFactor= 0; //GCC warning killer

  260.             assert(0);

  261.         }

  262. 

  263.         if (xInc <= 1<<16)      filterSize= 1 + sizeFactor; // upscale

  264.         else                    filterSize= 1 + (sizeFactor*srcW + dstW - 1)/ dstW;

  265. 

  266.         filterSize = av_clip(filterSize, 1, srcW - 2);

  267. 

  268.         FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);

  269. 

  270.         xDstInSrc= xInc - 0x10000;

  271.         for (i=0; i<dstW; i++) {

  272.             int xx= (xDstInSrc - ((filterSize-2)<<16)) / (1<<17);

  273.             int j;

  274.             (*filterPos)[i]= xx;

  275.             for (j=0; j<filterSize; j++) {

  276.                 int64_t d= ((int64_t)FFABS((xx<<17) - xDstInSrc))<<13;

  277.                 double floatd;

  278.                 int64_t coeff;

  279. 

  280.                 if (xInc > 1<<16)

  281.                     d= d*dstW/srcW;

  282.                 floatd= d * (1.0/(1<<30));

  283. 

  284.                 if (flags & SWS_BICUBIC) {

  285.                     int64_t B= (param[0] != SWS_PARAM_DEFAULT ? param[0] :   0) * (1<<24);

  286.                     int64_t C= (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1<<24);

  287. 

  288.                     if (d >= 1LL<<31) {

  289.                         coeff = 0.0;

  290.                     } else {

  291.                         int64_t dd  = (d  * d) >> 30;

  292.                         int64_t ddd = (dd * d) >> 30;

  293. 

  294.                         if (d < 1LL<<30)

  295.                             coeff = (12*(1<<24)-9*B-6*C)*ddd + (-18*(1<<24)+12*B+6*C)*dd + (6*(1<<24)-2*B)*(1<<30);

  296.                         else

  297.                             coeff = (-B-6*C)*ddd + (6*B+30*C)*dd + (-12*B-48*C)*d + (8*B+24*C)*(1<<30);

  298.                     }

  299.                     coeff *= fone>>(30+24);

  300.                 }

  301. /*                else if (flags & SWS_X) {

  302.                     double p= param ? param*0.01 : 0.3;

  303.                     coeff = d ? sin(d*M_PI)/(d*M_PI) : 1.0;

  304.                     coeff*= pow(2.0, - p*d*d);

  305.                 }*/

  306.                 else if (flags & SWS_X) {

  307.                     double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;

  308.                     double c;

  309. 

  310.                     if (floatd<1.0)

  311.                         c = cos(floatd*M_PI);

  312.                     else

  313.                         c=-1.0;

  314.                     if (c<0.0)      c= -pow(-c, A);

  315.                     else            c=  pow( c, A);

  316.                     coeff= (c*0.5 + 0.5)*fone;

  317.                 } else if (flags & SWS_AREA) {

  318.                     int64_t d2= d - (1<<29);

  319.                     if      (d2*xInc < -(1LL<<(29+16))) coeff= 1.0 * (1LL<<(30+16));

  320.                     else if (d2*xInc <  (1LL<<(29+16))) coeff= -d2*xInc + (1LL<<(29+16));

  321.                     else coeff=0.0;

  322.                     coeff *= fone>>(30+16);

  323.                 } else if (flags & SWS_GAUSS) {

  324.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  325.                     coeff = (pow(2.0, - p*floatd*floatd))*fone;

  326.                 } else if (flags & SWS_SINC) {

  327.                     coeff = (d ? sin(floatd*M_PI)/(floatd*M_PI) : 1.0)*fone;

  328.                 } else if (flags & SWS_LANCZOS) {

  329.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  330.                     coeff = (d ? sin(floatd*M_PI)*sin(floatd*M_PI/p)/(floatd*floatd*M_PI*M_PI/p) : 1.0)*fone;

  331.                     if (floatd>p) coeff=0;

  332.                 } else if (flags & SWS_BILINEAR) {

  333.                     coeff= (1<<30) - d;

  334.                     if (coeff<0) coeff=0;

  335.                     coeff *= fone >> 30;

  336.                 } else if (flags & SWS_SPLINE) {

  337.                     double p=-2.196152422706632;

  338.                     coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, floatd) * fone;

  339.                 } else {

  340.                     coeff= 0.0; //GCC warning killer

  341.                     assert(0);

  342.                 }

  343. 

  344.                 filter[i*filterSize + j]= coeff;

  345.                 xx++;

  346.             }

  347.             xDstInSrc+= 2*xInc;

  348.         }

  349.     }

  350. 

  351.     /* apply src & dst Filter to filter -> filter2

  352.        av_free(filter);

  353.     */

  354.     assert(filterSize>0);

  355.     filter2Size= filterSize;

  356.     if (srcFilter) filter2Size+= srcFilter->length - 1;

  357.     if (dstFilter) filter2Size+= dstFilter->length - 1;

  358.     assert(filter2Size>0);

  359.     FF_ALLOCZ_OR_GOTO(NULL, filter2, filter2Size*dstW*sizeof(*filter2), fail);

  360. 

  361.     for (i=0; i<dstW; i++) {

  362.         int j, k;

  363. 

  364.         if(srcFilter) {

  365.             for (k=0; k<srcFilter->length; k++) {

  366.                 for (j=0; j<filterSize; j++)

  367.                     filter2[i*filter2Size + k + j] += srcFilter->coeff[k]*filter[i*filterSize + j];

  368.             }

  369.         } else {

  370.             for (j=0; j<filterSize; j++)

  371.                 filter2[i*filter2Size + j]= filter[i*filterSize + j];

  372.         }

  373.         //FIXME dstFilter

  374. 

  375.         (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;

  376.     }

  377.     av_freep(&filter);

  378. 

  379.     /* try to reduce the filter-size (step1 find size and shift left) */

  380.     // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).

  381.     minFilterSize= 0;

  382.     for (i=dstW-1; i>=0; i--) {

  383.         int min= filter2Size;

  384.         int j;

  385.         int64_t cutOff=0.0;

  386. 

  387.         /* get rid of near zero elements on the left by shifting left */

  388.         for (j=0; j<filter2Size; j++) {

  389.             int k;

  390.             cutOff += FFABS(filter2[i*filter2Size]);

  391. 

  392.             if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;

  393. 

  394.             /* preserve monotonicity because the core can't handle the filter otherwise */

  395.             if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;

  396. 

  397.             // move filter coefficients left

  398.             for (k=1; k<filter2Size; k++)

  399.                 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];

  400.             filter2[i*filter2Size + k - 1]= 0;

  401.             (*filterPos)[i]++;

  402.         }

  403. 

  404.         cutOff=0;

  405.         /* count near zeros on the right */

  406.         for (j=filter2Size-1; j>0; j--) {

  407.             cutOff += FFABS(filter2[i*filter2Size + j]);

  408. 

  409.             if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;

  410.             min--;

  411.         }

  412. 

  413.         if (min>minFilterSize) minFilterSize= min;

  414.     }

  415. 

  416.     if (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) {

  417.         // we can handle the special case 4,

  418.         // so we don't want to go to the full 8

  419.         if (minFilterSize < 5)

  420.             filterAlign = 4;

  421. 

  422.         // We really don't want to waste our time

  423.         // doing useless computation, so fall back on

  424.         // the scalar C code for very small filters.

  425.         // Vectorizing is worth it only if you have a

  426.         // decent-sized vector.

  427.         if (minFilterSize < 3)

  428.             filterAlign = 1;

  429.     }

  430. 

  431.     if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {

  432.         // special case for unscaled vertical filtering

  433.         if (minFilterSize == 1 && filterAlign == 2)

  434.             filterAlign= 1;

  435.     }

  436. 

  437.     assert(minFilterSize > 0);

  438.     filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));

  439.     assert(filterSize > 0);

  440.     filter= av_malloc(filterSize*dstW*sizeof(*filter));

  441.     if (filterSize >= MAX_FILTER_SIZE*16/((flags&SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter)

  442.         goto fail;

  443.     *outFilterSize= filterSize;

  444. 

  445.     if (flags&SWS_PRINT_INFO)

  446.         av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);

  447.     /* try to reduce the filter-size (step2 reduce it) */

  448.     for (i=0; i<dstW; i++) {

  449.         int j;

  450. 

  451.         for (j=0; j<filterSize; j++) {

  452.             if (j>=filter2Size) filter[i*filterSize + j]= 0;

  453.             else               filter[i*filterSize + j]= filter2[i*filter2Size + j];

  454.             if((flags & SWS_BITEXACT) && j>=minFilterSize)

  455.                 filter[i*filterSize + j]= 0;

  456.         }

  457.     }

  458. 

  459.     //FIXME try to align filterPos if possible

  460. 

  461.     //fix borders

  462.     if (is_horizontal) {

  463.         for (i = 0; i < dstW; i++) {

  464.             int j;

  465.             if ((*filterPos)[i] < 0) {

  466.                 // move filter coefficients left to compensate for filterPos

  467.                 for (j = 1; j < filterSize; j++) {

  468.                     int left = FFMAX(j + (*filterPos)[i], 0);

  469.                     filter[i * filterSize + left] += filter[i * filterSize + j];

  470.                     filter[i * filterSize + j   ]  = 0;

  471.                 }

  472.                 (*filterPos)[i] = 0;

  473.             }

  474. 

  475.             if ((*filterPos)[i] + filterSize > srcW) {

  476.                 int shift = (*filterPos)[i] + filterSize - srcW;

  477.                 // move filter coefficients right to compensate for filterPos

  478.                 for (j = filterSize - 2; j >= 0; j--) {

  479.                     int right = FFMIN(j + shift, filterSize - 1);

  480.                     filter[i * filterSize + right] += filter[i * filterSize + j];

  481.                     filter[i * filterSize + j    ]  = 0;

  482.                 }

  483.                 (*filterPos)[i] = srcW - filterSize;

  484.             }

  485.         }

  486.     }

  487. 

  488.     // Note the +1 is for the MMX scaler which reads over the end

  489.     /* align at 16 for AltiVec (needed by hScale_altivec_real) */

  490.     FF_ALLOCZ_OR_GOTO(NULL, *outFilter, *outFilterSize*(dstW+3)*sizeof(int16_t), fail);

  491. 

  492.     /* normalize & store in outFilter */

  493.     for (i=0; i<dstW; i++) {

  494.         int j;

  495.         int64_t error=0;

  496.         int64_t sum=0;

  497. 

  498.         for (j=0; j<filterSize; j++) {

  499.             sum+= filter[i*filterSize + j];

  500.         }

  501.         sum= (sum + one/2)/ one;

  502.         for (j=0; j<*outFilterSize; j++) {

  503.             int64_t v= filter[i*filterSize + j] + error;

  504.             int intV= ROUNDED_DIV(v, sum);

  505.             (*outFilter)[i*(*outFilterSize) + j]= intV;

  506.             error= v - intV*sum;

  507.         }

  508.     }

  509. 

  510.     (*filterPos)[dstW+0] =

  511.     (*filterPos)[dstW+1] =

  512.     (*filterPos)[dstW+2] = (*filterPos)[dstW-1]; // the MMX/SSE scaler will read over the end

  513.     for (i=0; i<*outFilterSize; i++) {

  514.         int k= (dstW - 1) * (*outFilterSize) + i;

  515.         (*outFilter)[k + 1 * (*outFilterSize)] =

  516.         (*outFilter)[k + 2 * (*outFilterSize)] =

  517.         (*outFilter)[k + 3 * (*outFilterSize)] = (*outFilter)[k];

  518.     }

  519. 

  520.     ret=0;

  521. fail:

  522.     av_free(filter);

  523.     av_free(filter2);

  524.     return ret;

  525. }

  526. 

  527. #if HAVE_MMX2

  528. static int initMMX2HScaler(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits)

  529. {

  530.     uint8_t *fragmentA;

  531.     x86_reg imm8OfPShufW1A;

  532.     x86_reg imm8OfPShufW2A;

  533.     x86_reg fragmentLengthA;

  534.     uint8_t *fragmentB;

  535.     x86_reg imm8OfPShufW1B;

  536.     x86_reg imm8OfPShufW2B;

  537.     x86_reg fragmentLengthB;

  538.     int fragmentPos;

  539. 

  540.     int xpos, i;

  541. 

  542.     // create an optimized horizontal scaling routine

  543.     /* This scaler is made of runtime-generated MMX2 code using specially

  544.      * tuned pshufw instructions. For every four output pixels, if four

  545.      * input pixels are enough for the fast bilinear scaling, then a chunk

  546.      * of fragmentB is used. If five input pixels are needed, then a chunk

  547.      * of fragmentA is used.

  548.      */

  549. 

  550.     //code fragment

  551. 

  552.     __asm__ volatile(

  553.         "jmp                         9f                 \n\t"

  554.     // Begin

  555.         "0:                                             \n\t"

  556.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  557.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  558.         "movd   1(%%"REG_c", %%"REG_S"), %%mm1          \n\t"

  559.         "punpcklbw                %%mm7, %%mm1          \n\t"

  560.         "punpcklbw                %%mm7, %%mm0          \n\t"

  561.         "pshufw                   $0xFF, %%mm1, %%mm1   \n\t"

  562.         "1:                                             \n\t"

  563.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  564.         "2:                                             \n\t"

  565.         "psubw                    %%mm1, %%mm0          \n\t"

  566.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  567.         "pmullw                   %%mm3, %%mm0          \n\t"

  568.         "psllw                       $7, %%mm1          \n\t"

  569.         "paddw                    %%mm1, %%mm0          \n\t"

  570. 

  571.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  572. 

  573.         "add                         $8, %%"REG_a"      \n\t"

  574.     // End

  575.         "9:                                             \n\t"

  576. //        "int $3                                         \n\t"

  577.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  578.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  579.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  580.         "dec                         %1                 \n\t"

  581.         "dec                         %2                 \n\t"

  582.         "sub                         %0, %1             \n\t"

  583.         "sub                         %0, %2             \n\t"

  584.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  585.         "sub                         %0, %3             \n\t"

  586. 

  587. 

  588.         :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),

  589.         "=r" (fragmentLengthA)

  590.     );

  591. 

  592.     __asm__ volatile(

  593.         "jmp                         9f                 \n\t"

  594.     // Begin

  595.         "0:                                             \n\t"

  596.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  597.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  598.         "punpcklbw                %%mm7, %%mm0          \n\t"

  599.         "pshufw                   $0xFF, %%mm0, %%mm1   \n\t"

  600.         "1:                                             \n\t"

  601.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  602.         "2:                                             \n\t"

  603.         "psubw                    %%mm1, %%mm0          \n\t"

  604.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  605.         "pmullw                   %%mm3, %%mm0          \n\t"

  606.         "psllw                       $7, %%mm1          \n\t"

  607.         "paddw                    %%mm1, %%mm0          \n\t"

  608. 

  609.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  610. 

  611.         "add                         $8, %%"REG_a"      \n\t"

  612.     // End

  613.         "9:                                             \n\t"

  614. //        "int                       $3                   \n\t"

  615.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  616.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  617.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  618.         "dec                         %1                 \n\t"

  619.         "dec                         %2                 \n\t"

  620.         "sub                         %0, %1             \n\t"

  621.         "sub                         %0, %2             \n\t"

  622.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  623.         "sub                         %0, %3             \n\t"

  624. 

  625. 

  626.         :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),

  627.         "=r" (fragmentLengthB)

  628.     );

  629. 

  630.     xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  631.     fragmentPos=0;

  632. 

  633.     for (i=0; i<dstW/numSplits; i++) {

  634.         int xx=xpos>>16;

  635. 

  636.         if ((i&3) == 0) {

  637.             int a=0;

  638.             int b=((xpos+xInc)>>16) - xx;

  639.             int c=((xpos+xInc*2)>>16) - xx;

  640.             int d=((xpos+xInc*3)>>16) - xx;

  641.             int inc                = (d+1<4);

  642.             uint8_t *fragment      = (d+1<4) ? fragmentB       : fragmentA;

  643.             x86_reg imm8OfPShufW1  = (d+1<4) ? imm8OfPShufW1B  : imm8OfPShufW1A;

  644.             x86_reg imm8OfPShufW2  = (d+1<4) ? imm8OfPShufW2B  : imm8OfPShufW2A;

  645.             x86_reg fragmentLength = (d+1<4) ? fragmentLengthB : fragmentLengthA;

  646.             int maxShift= 3-(d+inc);

  647.             int shift=0;

  648. 

  649.             if (filterCode) {

  650.                 filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;

  651.                 filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;

  652.                 filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;

  653.                 filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;

  654.                 filterPos[i/2]= xx;

  655. 

  656.                 memcpy(filterCode + fragmentPos, fragment, fragmentLength);

  657. 

  658.                 filterCode[fragmentPos + imm8OfPShufW1]=

  659.                     (a+inc) | ((b+inc)<<2) | ((c+inc)<<4) | ((d+inc)<<6);

  660.                 filterCode[fragmentPos + imm8OfPShufW2]=

  661.                     a | (b<<2) | (c<<4) | (d<<6);

  662. 

  663.                 if (i+4-inc>=dstW) shift=maxShift; //avoid overread

  664.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align

  665. 

  666.                 if (shift && i>=shift) {

  667.                     filterCode[fragmentPos + imm8OfPShufW1]+= 0x55*shift;

  668.                     filterCode[fragmentPos + imm8OfPShufW2]+= 0x55*shift;

  669.                     filterPos[i/2]-=shift;

  670.                 }

  671.             }

  672. 

  673.             fragmentPos+= fragmentLength;

  674. 

  675.             if (filterCode)

  676.                 filterCode[fragmentPos]= RET;

  677.         }

  678.         xpos+=xInc;

  679.     }

  680.     if (filterCode)

  681.         filterPos[((i/2)+1)&(~1)]= xpos>>16; // needed to jump to the next part

  682. 

  683.     return fragmentPos + 1;

  684. }

  685. #endif /* HAVE_MMX2 */

  686. 

  687. static void getSubSampleFactors(int *h, int *v, enum PixelFormat format)

  688. {

  689.     *h = av_pix_fmt_descriptors[format].log2_chroma_w;

  690.     *v = av_pix_fmt_descriptors[format].log2_chroma_h;

  691. }

  692. 

  693. int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],

  694.                              int srcRange, const int table[4], int dstRange,

  695.                              int brightness, int contrast, int saturation)

  696. {

  697.     memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);

  698.     memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);

  699. 

  700.     c->brightness= brightness;

  701.     c->contrast  = contrast;

  702.     c->saturation= saturation;

  703.     c->srcRange  = srcRange;

  704.     c->dstRange  = dstRange;

  705.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  706. 

  707.     c->dstFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[c->dstFormat]);

  708.     c->srcFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[c->srcFormat]);

  709. 

  710.     ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);

  711.     //FIXME factorize

  712. 

  713.     if (HAVE_ALTIVEC && av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC)

  714.         ff_yuv2rgb_init_tables_altivec(c, inv_table, brightness, contrast, saturation);

  715.     return 0;

  716. }

  717. 

  718. int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table,

  719.                              int *srcRange, int **table, int *dstRange,

  720.                              int *brightness, int *contrast, int *saturation)

  721. {

  722.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  723. 

  724.     *inv_table = c->srcColorspaceTable;

  725.     *table     = c->dstColorspaceTable;

  726.     *srcRange  = c->srcRange;

  727.     *dstRange  = c->dstRange;

  728.     *brightness= c->brightness;

  729.     *contrast  = c->contrast;

  730.     *saturation= c->saturation;

  731. 

  732.     return 0;

  733. }

  734. 

  735. static int handle_jpeg(enum PixelFormat *format)

  736. {

  737.     switch (*format) {

  738.     case PIX_FMT_YUVJ420P: *format = PIX_FMT_YUV420P; return 1;

  739.     case PIX_FMT_YUVJ422P: *format = PIX_FMT_YUV422P; return 1;

  740.     case PIX_FMT_YUVJ444P: *format = PIX_FMT_YUV444P; return 1;

  741.     case PIX_FMT_YUVJ440P: *format = PIX_FMT_YUV440P; return 1;

  742.     default:                                          return 0;

  743.     }

  744. }

  745. 

  746. SwsContext *sws_alloc_context(void)

  747. {

  748.     SwsContext *c= av_mallocz(sizeof(SwsContext));

  749. 

  750.     c->av_class = &sws_context_class;

  751.     av_opt_set_defaults(c);

  752. 

  753.     return c;

  754. }

  755. 

  756. int sws_init_context(SwsContext *c, SwsFilter *srcFilter, SwsFilter *dstFilter)

  757. {

  758.     int i;

  759.     int usesVFilter, usesHFilter;

  760.     int unscaled;

  761.     SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  762.     int srcW= c->srcW;

  763.     int srcH= c->srcH;

  764.     int dstW= c->dstW;

  765.     int dstH= c->dstH;

  766.     int dst_stride = FFALIGN(dstW * sizeof(int16_t) + 16, 16), dst_stride_px = dst_stride >> 1;

  767.     int flags, cpu_flags;

  768.     enum PixelFormat srcFormat= c->srcFormat;

  769.     enum PixelFormat dstFormat= c->dstFormat;

  770. 

  771.     cpu_flags = av_get_cpu_flags();

  772.     flags     = c->flags;

  773.     emms_c();

  774.     if (!rgb15to16) sws_rgb2rgb_init();

  775. 

  776.     unscaled = (srcW == dstW && srcH == dstH);

  777. 

  778.     if (!sws_isSupportedInput(srcFormat)) {

  779.         av_log(c, AV_LOG_ERROR, "%s is not supported as input pixel format\n", sws_format_name(srcFormat));

  780.         return AVERROR(EINVAL);

  781.     }

  782.     if (!sws_isSupportedOutput(dstFormat)) {

  783.         av_log(c, AV_LOG_ERROR, "%s is not supported as output pixel format\n", sws_format_name(dstFormat));

  784.         return AVERROR(EINVAL);

  785.     }

  786. 

  787.     i= flags & ( SWS_POINT

  788.                 |SWS_AREA

  789.                 |SWS_BILINEAR

  790.                 |SWS_FAST_BILINEAR

  791.                 |SWS_BICUBIC

  792.                 |SWS_X

  793.                 |SWS_GAUSS

  794.                 |SWS_LANCZOS

  795.                 |SWS_SINC

  796.                 |SWS_SPLINE

  797.                 |SWS_BICUBLIN);

  798.     if(!i || (i & (i-1))) {

  799.         av_log(c, AV_LOG_ERROR, "Exactly one scaler algorithm must be chosen\n");

  800.         return AVERROR(EINVAL);

  801.     }

  802.     /* sanity check */

  803.     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

  804.         av_log(c, AV_LOG_ERROR, "%dx%d -> %dx%d is invalid scaling dimension\n",

  805.                srcW, srcH, dstW, dstH);

  806.         return AVERROR(EINVAL);

  807.     }

  808. 

  809.     if (!dstFilter) dstFilter= &dummyFilter;

  810.     if (!srcFilter) srcFilter= &dummyFilter;

  811. 

  812.     c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  813.     c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  814.     c->dstFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[dstFormat]);

  815.     c->srcFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[srcFormat]);

  816.     c->vRounder= 4* 0x0001000100010001ULL;

  817. 

  818.     usesVFilter = (srcFilter->lumV && srcFilter->lumV->length>1) ||

  819.                   (srcFilter->chrV && srcFilter->chrV->length>1) ||

  820.                   (dstFilter->lumV && dstFilter->lumV->length>1) ||

  821.                   (dstFilter->chrV && dstFilter->chrV->length>1);

  822.     usesHFilter = (srcFilter->lumH && srcFilter->lumH->length>1) ||

  823.                   (srcFilter->chrH && srcFilter->chrH->length>1) ||

  824.                   (dstFilter->lumH && dstFilter->lumH->length>1) ||

  825.                   (dstFilter->chrH && dstFilter->chrH->length>1);

  826. 

  827.     getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);

  828.     getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);

  829. 

  830.     // reuse chroma for 2 pixels RGB/BGR unless user wants full chroma interpolation

  831.     if (flags & SWS_FULL_CHR_H_INT &&

  832.         isAnyRGB(dstFormat)       &&

  833.         dstFormat != PIX_FMT_RGBA &&

  834.         dstFormat != PIX_FMT_ARGB &&

  835.         dstFormat != PIX_FMT_BGRA &&

  836.         dstFormat != PIX_FMT_ABGR &&

  837.         dstFormat != PIX_FMT_RGB24 &&

  838.         dstFormat != PIX_FMT_BGR24) {

  839.         av_log(c, AV_LOG_ERROR,

  840.                "full chroma interpolation for destination format '%s' not yet implemented\n",

  841.                sws_format_name(dstFormat));

  842.         flags &= ~SWS_FULL_CHR_H_INT;

  843.         c->flags = flags;

  844.     }

  845.     if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;

  846. 

  847.     // drop some chroma lines if the user wants it

  848.     c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;

  849.     c->chrSrcVSubSample+= c->vChrDrop;

  850. 

  851.     // drop every other pixel for chroma calculation unless user wants full chroma

  852.     if (isAnyRGB(srcFormat) && !(flags&SWS_FULL_CHR_H_INP)

  853.       && srcFormat!=PIX_FMT_RGB8      && srcFormat!=PIX_FMT_BGR8

  854.       && srcFormat!=PIX_FMT_RGB4      && srcFormat!=PIX_FMT_BGR4

  855.       && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE

  856.       && ((dstW>>c->chrDstHSubSample) <= (srcW>>1) || (flags&SWS_FAST_BILINEAR)))

  857.         c->chrSrcHSubSample=1;

  858. 

  859.     // Note the -((-x)>>y) is so that we always round toward +inf.

  860.     c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);

  861.     c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);

  862.     c->chrDstW= -((-dstW) >> c->chrDstHSubSample);

  863.     c->chrDstH= -((-dstH) >> c->chrDstVSubSample);

  864. 

  865.     /* unscaled special cases */

  866.     if (unscaled && !usesHFilter && !usesVFilter && (c->srcRange == c->dstRange || isAnyRGB(dstFormat))) {

  867.         ff_get_unscaled_swscale(c);

  868. 

  869.         if (c->swScale) {

  870.             if (flags&SWS_PRINT_INFO)

  871.                 av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",

  872.                        sws_format_name(srcFormat), sws_format_name(dstFormat));

  873.             return 0;

  874.         }

  875.     }

  876. 

  877.     c->srcBpc = 1 + av_pix_fmt_descriptors[srcFormat].comp[0].depth_minus1;

  878.     if (c->srcBpc < 8)

  879.         c->srcBpc = 8;

  880.     c->dstBpc = 1 + av_pix_fmt_descriptors[dstFormat].comp[0].depth_minus1;

  881.     if (c->dstBpc < 8)

  882.         c->dstBpc = 8;

  883.     if (c->dstBpc == 16)

  884.         dst_stride <<= 1;

  885.     FF_ALLOC_OR_GOTO(c, c->formatConvBuffer,

  886.                      (FFALIGN(srcW, 16) * 2 * FFALIGN(c->srcBpc, 8) >> 3) + 16,

  887.                      fail);

  888.     if (HAVE_MMX2 && cpu_flags & AV_CPU_FLAG_MMX2 && c->srcBpc == 8 && c->dstBpc <= 10) {

  889.         c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  890.         if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR)) {

  891.             if (flags&SWS_PRINT_INFO)

  892.                 av_log(c, AV_LOG_INFO, "output width is not a multiple of 32 -> no MMX2 scaler\n");

  893.         }

  894.         if (usesHFilter) c->canMMX2BeUsed=0;

  895.     }

  896.     else

  897.         c->canMMX2BeUsed=0;

  898. 

  899.     c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  900.     c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  901. 

  902.     // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  903.     // but only for the FAST_BILINEAR mode otherwise do correct scaling

  904.     // n-2 is the last chrominance sample available

  905.     // this is not perfect, but no one should notice the difference, the more correct variant

  906.     // would be like the vertical one, but that would require some special code for the

  907.     // first and last pixel

  908.     if (flags&SWS_FAST_BILINEAR) {

  909.         if (c->canMMX2BeUsed) {

  910.             c->lumXInc+= 20;

  911.             c->chrXInc+= 20;

  912.         }

  913.         //we don't use the x86 asm scaler if MMX is available

  914.         else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {

  915.             c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  916.             c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  917.         }

  918.     }

  919. 

  920.     /* precalculate horizontal scaler filter coefficients */

  921.     {

  922. #if HAVE_MMX2

  923. // can't downscale !!!

  924.         if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR)) {

  925.             c->lumMmx2FilterCodeSize = initMMX2HScaler(      dstW, c->lumXInc, NULL, NULL, NULL, 8);

  926.             c->chrMmx2FilterCodeSize = initMMX2HScaler(c->chrDstW, c->chrXInc, NULL, NULL, NULL, 4);

  927. 

  928. #ifdef MAP_ANONYMOUS

  929.             c->lumMmx2FilterCode = mmap(NULL, c->lumMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);

  930.             c->chrMmx2FilterCode = mmap(NULL, c->chrMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);

  931. #elif HAVE_VIRTUALALLOC

  932.             c->lumMmx2FilterCode = VirtualAlloc(NULL, c->lumMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);

  933.             c->chrMmx2FilterCode = VirtualAlloc(NULL, c->chrMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);

  934. #else

  935.             c->lumMmx2FilterCode = av_malloc(c->lumMmx2FilterCodeSize);

  936.             c->chrMmx2FilterCode = av_malloc(c->chrMmx2FilterCodeSize);

  937. #endif

  938. 

  939.             if (!c->lumMmx2FilterCode || !c->chrMmx2FilterCode)

  940.                 return AVERROR(ENOMEM);

  941.             FF_ALLOCZ_OR_GOTO(c, c->hLumFilter   , (dstW        /8+8)*sizeof(int16_t), fail);

  942.             FF_ALLOCZ_OR_GOTO(c, c->hChrFilter   , (c->chrDstW  /4+8)*sizeof(int16_t), fail);

  943.             FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW      /2/8+8)*sizeof(int32_t), fail);

  944.             FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW/2/4+8)*sizeof(int32_t), fail);

  945. 

  946.             initMMX2HScaler(      dstW, c->lumXInc, c->lumMmx2FilterCode, c->hLumFilter, c->hLumFilterPos, 8);

  947.             initMMX2HScaler(c->chrDstW, c->chrXInc, c->chrMmx2FilterCode, c->hChrFilter, c->hChrFilterPos, 4);

  948. 

  949. #ifdef MAP_ANONYMOUS

  950.             mprotect(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize, PROT_EXEC | PROT_READ);

  951.             mprotect(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize, PROT_EXEC | PROT_READ);

  952. #endif

  953.         } else

  954. #endif /* HAVE_MMX2 */

  955.         {

  956.             const int filterAlign=

  957.                 (HAVE_MMX     && cpu_flags & AV_CPU_FLAG_MMX) ? 4 :

  958.                 (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) ? 8 :

  959.                 1;

  960. 

  961.             if (initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  962.                            srcW      ,       dstW, filterAlign, 1<<14,

  963.                            (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags, cpu_flags,

  964.                            srcFilter->lumH, dstFilter->lumH, c->param, 1) < 0)

  965.                 goto fail;

  966.             if (initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  967.                            c->chrSrcW, c->chrDstW, filterAlign, 1<<14,

  968.                            (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags, cpu_flags,

  969.                            srcFilter->chrH, dstFilter->chrH, c->param, 1) < 0)

  970.                 goto fail;

  971.         }

  972.     } // initialize horizontal stuff

  973. 

  974.     /* precalculate vertical scaler filter coefficients */

  975.     {

  976.         const int filterAlign=

  977.             (HAVE_MMX     && cpu_flags & AV_CPU_FLAG_MMX) ? 2 :

  978.             (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) ? 8 :

  979.             1;

  980. 

  981.         if (initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  982.                        srcH      ,        dstH, filterAlign, (1<<12),

  983.                        (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags, cpu_flags,

  984.                        srcFilter->lumV, dstFilter->lumV, c->param, 0) < 0)

  985.             goto fail;

  986.         if (initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  987.                        c->chrSrcH, c->chrDstH, filterAlign, (1<<12),

  988.                        (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags, cpu_flags,

  989.                        srcFilter->chrV, dstFilter->chrV, c->param, 0) < 0)

  990.             goto fail;

  991. 

  992. #if HAVE_ALTIVEC

  993.         FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof (vector signed short)*c->vLumFilterSize*c->dstH, fail);

  994.         FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH, fail);

  995. 

  996.         for (i=0;i<c->vLumFilterSize*c->dstH;i++) {

  997.             int j;

  998.             short *p = (short *)&c->vYCoeffsBank[i];

  999.             for (j=0;j<8;j++)

  1000.                 p[j] = c->vLumFilter[i];

  1001.         }

  1002. 

  1003.         for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {

  1004.             int j;

  1005.             short *p = (short *)&c->vCCoeffsBank[i];

  1006.             for (j=0;j<8;j++)

  1007.                 p[j] = c->vChrFilter[i];

  1008.         }

  1009. #endif

  1010.     }

  1011. 

  1012.     // calculate buffer sizes so that they won't run out while handling these damn slices

  1013.     c->vLumBufSize= c->vLumFilterSize;

  1014.     c->vChrBufSize= c->vChrFilterSize;

  1015.     for (i=0; i<dstH; i++) {

  1016.         int chrI= i*c->chrDstH / dstH;

  1017.         int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  1018.                            ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));

  1019. 

  1020.         nextSlice>>= c->chrSrcVSubSample;

  1021.         nextSlice<<= c->chrSrcVSubSample;

  1022.         if (c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  1023.             c->vLumBufSize= nextSlice - c->vLumFilterPos[i];

  1024.         if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))

  1025.             c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];

  1026.     }

  1027. 

  1028.     // allocate pixbufs (we use dynamic allocation because otherwise we would need to

  1029.     // allocate several megabytes to handle all possible cases)

  1030.     FF_ALLOC_OR_GOTO(c, c->lumPixBuf, c->vLumBufSize*3*sizeof(int16_t*), fail);

  1031.     FF_ALLOC_OR_GOTO(c, c->chrUPixBuf, c->vChrBufSize*3*sizeof(int16_t*), fail);

  1032.     FF_ALLOC_OR_GOTO(c, c->chrVPixBuf, c->vChrBufSize*3*sizeof(int16_t*), fail);

  1033.     if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat))

  1034.         FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf, c->vLumBufSize*3*sizeof(int16_t*), fail);

  1035.     //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)

  1036.     /* align at 16 bytes for AltiVec */

  1037.     for (i=0; i<c->vLumBufSize; i++) {

  1038.         FF_ALLOCZ_OR_GOTO(c, c->lumPixBuf[i+c->vLumBufSize], dst_stride+16, fail);

  1039.         c->lumPixBuf[i] = c->lumPixBuf[i+c->vLumBufSize];

  1040.     }

  1041.     // 64 / (c->dstBpc & ~7) is the same as 16 / sizeof(scaling_intermediate)

  1042.     c->uv_off_px   = dst_stride_px + 64 / (c->dstBpc &~ 7);

  1043.     c->uv_off_byte = dst_stride + 16;

  1044.     for (i=0; i<c->vChrBufSize; i++) {

  1045.         FF_ALLOC_OR_GOTO(c, c->chrUPixBuf[i+c->vChrBufSize], dst_stride*2+32, fail);

  1046.         c->chrUPixBuf[i] = c->chrUPixBuf[i+c->vChrBufSize];

  1047.         c->chrVPixBuf[i] = c->chrVPixBuf[i+c->vChrBufSize] = c->chrUPixBuf[i] + (dst_stride >> 1) + 8;

  1048.     }

  1049.     if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf)

  1050.         for (i=0; i<c->vLumBufSize; i++) {

  1051.             FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf[i+c->vLumBufSize], dst_stride+16, fail);

  1052.             c->alpPixBuf[i] = c->alpPixBuf[i+c->vLumBufSize];

  1053.         }

  1054. 

  1055.     //try to avoid drawing green stuff between the right end and the stride end

  1056.     for (i=0; i<c->vChrBufSize; i++)

  1057.         memset(c->chrUPixBuf[i], 64, dst_stride*2+1);

  1058. 

  1059.     assert(c->chrDstH <= dstH);

  1060. 

  1061.     if (flags&SWS_PRINT_INFO) {

  1062.         if      (flags&SWS_FAST_BILINEAR) av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");

  1063.         else if (flags&SWS_BILINEAR)      av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");

  1064.         else if (flags&SWS_BICUBIC)       av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");

  1065.         else if (flags&SWS_X)             av_log(c, AV_LOG_INFO, "Experimental scaler, ");

  1066.         else if (flags&SWS_POINT)         av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");

  1067.         else if (flags&SWS_AREA)          av_log(c, AV_LOG_INFO, "Area Averaging scaler, ");

  1068.         else if (flags&SWS_BICUBLIN)      av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");

  1069.         else if (flags&SWS_GAUSS)         av_log(c, AV_LOG_INFO, "Gaussian scaler, ");

  1070.         else if (flags&SWS_SINC)          av_log(c, AV_LOG_INFO, "Sinc scaler, ");

  1071.         else if (flags&SWS_LANCZOS)       av_log(c, AV_LOG_INFO, "Lanczos scaler, ");

  1072.         else if (flags&SWS_SPLINE)        av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");

  1073.         else                              av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");

  1074. 

  1075.         av_log(c, AV_LOG_INFO, "from %s to %s%s ",

  1076.                sws_format_name(srcFormat),

  1077. #ifdef DITHER1XBPP

  1078.                dstFormat == PIX_FMT_BGR555 || dstFormat == PIX_FMT_BGR565 ||

  1079.                dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE ||

  1080.                dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE ? "dithered " : "",

  1081. #else

  1082.                "",

  1083. #endif

  1084.                sws_format_name(dstFormat));

  1085. 

  1086.         if      (HAVE_MMX2     && cpu_flags & AV_CPU_FLAG_MMX2)    av_log(c, AV_LOG_INFO, "using MMX2\n");

  1087.         else if (HAVE_AMD3DNOW && cpu_flags & AV_CPU_FLAG_3DNOW)   av_log(c, AV_LOG_INFO, "using 3DNOW\n");

  1088.         else if (HAVE_MMX      && cpu_flags & AV_CPU_FLAG_MMX)     av_log(c, AV_LOG_INFO, "using MMX\n");

  1089.         else if (HAVE_ALTIVEC  && cpu_flags & AV_CPU_FLAG_ALTIVEC) av_log(c, AV_LOG_INFO, "using AltiVec\n");

  1090.         else                                   av_log(c, AV_LOG_INFO, "using C\n");

  1091. 

  1092.         av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  1093.         av_log(c, AV_LOG_DEBUG, "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  1094.                c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  1095.         av_log(c, AV_LOG_DEBUG, "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  1096.                c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  1097.     }

  1098. 

  1099.     c->swScale= ff_getSwsFunc(c);

  1100.     return 0;

  1101. fail: //FIXME replace things by appropriate error codes

  1102.     return -1;

  1103. }

  1104. 

  1105. #if FF_API_SWS_GETCONTEXT

  1106. SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,

  1107.                            int dstW, int dstH, enum PixelFormat dstFormat, int flags,

  1108.                            SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)

  1109. {

  1110.     SwsContext *c;

  1111. 

  1112.     if(!(c=sws_alloc_context()))

  1113.         return NULL;

  1114. 

  1115.     c->flags= flags;

  1116.     c->srcW= srcW;

  1117.     c->srcH= srcH;

  1118.     c->dstW= dstW;

  1119.     c->dstH= dstH;

  1120.     c->srcRange = handle_jpeg(&srcFormat);

  1121.     c->dstRange = handle_jpeg(&dstFormat);

  1122.     c->srcFormat= srcFormat;

  1123.     c->dstFormat= dstFormat;

  1124. 

  1125.     if (param) {

  1126.         c->param[0] = param[0];

  1127.         c->param[1] = param[1];

  1128.     }

  1129.     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);

  1130. 

  1131.     if(sws_init_context(c, srcFilter, dstFilter) < 0){

  1132.         sws_freeContext(c);

  1133.         return NULL;

  1134.     }

  1135. 

  1136.     return c;

  1137. }

  1138. #endif

  1139. 

  1140. SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,

  1141.                                 float lumaSharpen, float chromaSharpen,

  1142.                                 float chromaHShift, float chromaVShift,

  1143.                                 int verbose)

  1144. {

  1145.     SwsFilter *filter= av_malloc(sizeof(SwsFilter));

  1146.     if (!filter)

  1147.         return NULL;

  1148. 

  1149.     if (lumaGBlur!=0.0) {

  1150.         filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);

  1151.         filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);

  1152.     } else {

  1153.         filter->lumH= sws_getIdentityVec();

  1154.         filter->lumV= sws_getIdentityVec();

  1155.     }

  1156. 

  1157.     if (chromaGBlur!=0.0) {

  1158.         filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);

  1159.         filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);

  1160.     } else {

  1161.         filter->chrH= sws_getIdentityVec();

  1162.         filter->chrV= sws_getIdentityVec();

  1163.     }

  1164. 

  1165.     if (chromaSharpen!=0.0) {

  1166.         SwsVector *id= sws_getIdentityVec();

  1167.         sws_scaleVec(filter->chrH, -chromaSharpen);

  1168.         sws_scaleVec(filter->chrV, -chromaSharpen);

  1169.         sws_addVec(filter->chrH, id);

  1170.         sws_addVec(filter->chrV, id);

  1171.         sws_freeVec(id);

  1172.     }

  1173. 

  1174.     if (lumaSharpen!=0.0) {

  1175.         SwsVector *id= sws_getIdentityVec();

  1176.         sws_scaleVec(filter->lumH, -lumaSharpen);

  1177.         sws_scaleVec(filter->lumV, -lumaSharpen);

  1178.         sws_addVec(filter->lumH, id);

  1179.         sws_addVec(filter->lumV, id);

  1180.         sws_freeVec(id);

  1181.     }

  1182. 

  1183.     if (chromaHShift != 0.0)

  1184.         sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));

  1185. 

  1186.     if (chromaVShift != 0.0)

  1187.         sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));

  1188. 

  1189.     sws_normalizeVec(filter->chrH, 1.0);

  1190.     sws_normalizeVec(filter->chrV, 1.0);

  1191.     sws_normalizeVec(filter->lumH, 1.0);

  1192.     sws_normalizeVec(filter->lumV, 1.0);

  1193. 

  1194.     if (verbose) sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);

  1195.     if (verbose) sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);

  1196. 

  1197.     return filter;

  1198. }

  1199. 

  1200. SwsVector *sws_allocVec(int length)

  1201. {

  1202.     SwsVector *vec = av_malloc(sizeof(SwsVector));

  1203.     if (!vec)

  1204.         return NULL;

  1205.     vec->length = length;

  1206.     vec->coeff  = av_malloc(sizeof(double) * length);

  1207.     if (!vec->coeff)

  1208.         av_freep(&vec);

  1209.     return vec;

  1210. }

  1211. 

  1212. SwsVector *sws_getGaussianVec(double variance, double quality)

  1213. {

  1214.     const int length= (int)(variance*quality + 0.5) | 1;

  1215.     int i;

  1216.     double middle= (length-1)*0.5;

  1217.     SwsVector *vec= sws_allocVec(length);

  1218. 

  1219.     if (!vec)

  1220.         return NULL;

  1221. 

  1222.     for (i=0; i<length; i++) {

  1223.         double dist= i-middle;

  1224.         vec->coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*M_PI);

  1225.     }

  1226. 

  1227.     sws_normalizeVec(vec, 1.0);

  1228. 

  1229.     return vec;

  1230. }

  1231. 

  1232. SwsVector *sws_getConstVec(double c, int length)

  1233. {

  1234.     int i;

  1235.     SwsVector *vec= sws_allocVec(length);

  1236. 

  1237.     if (!vec)

  1238.         return NULL;

  1239. 

  1240.     for (i=0; i<length; i++)

  1241.         vec->coeff[i]= c;

  1242. 

  1243.     return vec;

  1244. }

  1245. 

  1246. SwsVector *sws_getIdentityVec(void)

  1247. {

  1248.     return sws_getConstVec(1.0, 1);

  1249. }

  1250. 

  1251. static double sws_dcVec(SwsVector *a)

  1252. {

  1253.     int i;

  1254.     double sum=0;

  1255. 

  1256.     for (i=0; i<a->length; i++)

  1257.         sum+= a->coeff[i];

  1258. 

  1259.     return sum;

  1260. }

  1261. 

  1262. void sws_scaleVec(SwsVector *a, double scalar)

  1263. {

  1264.     int i;

  1265. 

  1266.     for (i=0; i<a->length; i++)

  1267.         a->coeff[i]*= scalar;

  1268. }

  1269. 

  1270. void sws_normalizeVec(SwsVector *a, double height)

  1271. {

  1272.     sws_scaleVec(a, height/sws_dcVec(a));

  1273. }

  1274. 

  1275. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b)

  1276. {

  1277.     int length= a->length + b->length - 1;

  1278.     int i, j;

  1279.     SwsVector *vec= sws_getConstVec(0.0, length);

  1280. 

  1281.     if (!vec)

  1282.         return NULL;

  1283. 

  1284.     for (i=0; i<a->length; i++) {

  1285.         for (j=0; j<b->length; j++) {

  1286.             vec->coeff[i+j]+= a->coeff[i]*b->coeff[j];

  1287.         }

  1288.     }

  1289. 

  1290.     return vec;

  1291. }

  1292. 

  1293. static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b)

  1294. {

  1295.     int length= FFMAX(a->length, b->length);

  1296.     int i;

  1297.     SwsVector *vec= sws_getConstVec(0.0, length);

  1298. 

  1299.     if (!vec)

  1300.         return NULL;

  1301. 

  1302.     for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  1303.     for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  1304. 

  1305.     return vec;

  1306. }

  1307. 

  1308. static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b)

  1309. {

  1310.     int length= FFMAX(a->length, b->length);

  1311.     int i;

  1312.     SwsVector *vec= sws_getConstVec(0.0, length);

  1313. 

  1314.     if (!vec)

  1315.         return NULL;

  1316. 

  1317.     for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  1318.     for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  1319. 

  1320.     return vec;

  1321. }

  1322. 

  1323. /* shift left / or right if "shift" is negative */

  1324. static SwsVector *sws_getShiftedVec(SwsVector *a, int shift)

  1325. {

  1326.     int length= a->length + FFABS(shift)*2;

  1327.     int i;

  1328.     SwsVector *vec= sws_getConstVec(0.0, length);

  1329. 

  1330.     if (!vec)

  1331.         return NULL;

  1332. 

  1333.     for (i=0; i<a->length; i++) {

  1334.         vec->coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  1335.     }

  1336. 

  1337.     return vec;

  1338. }

  1339. 

  1340. void sws_shiftVec(SwsVector *a, int shift)

  1341. {

  1342.     SwsVector *shifted= sws_getShiftedVec(a, shift);

  1343.     av_free(a->coeff);

  1344.     a->coeff= shifted->coeff;

  1345.     a->length= shifted->length;

  1346.     av_free(shifted);

  1347. }

  1348. 

  1349. void sws_addVec(SwsVector *a, SwsVector *b)

  1350. {

  1351.     SwsVector *sum= sws_sumVec(a, b);

  1352.     av_free(a->coeff);

  1353.     a->coeff= sum->coeff;

  1354.     a->length= sum->length;

  1355.     av_free(sum);

  1356. }

  1357. 

  1358. void sws_subVec(SwsVector *a, SwsVector *b)

  1359. {

  1360.     SwsVector *diff= sws_diffVec(a, b);

  1361.     av_free(a->coeff);

  1362.     a->coeff= diff->coeff;

  1363.     a->length= diff->length;

  1364.     av_free(diff);

  1365. }

  1366. 

  1367. void sws_convVec(SwsVector *a, SwsVector *b)

  1368. {

  1369.     SwsVector *conv= sws_getConvVec(a, b);

  1370.     av_free(a->coeff);

  1371.     a->coeff= conv->coeff;

  1372.     a->length= conv->length;

  1373.     av_free(conv);

  1374. }

  1375. 

  1376. SwsVector *sws_cloneVec(SwsVector *a)

  1377. {

  1378.     int i;

  1379.     SwsVector *vec= sws_allocVec(a->length);

  1380. 

  1381.     if (!vec)

  1382.         return NULL;

  1383. 

  1384.     for (i=0; i<a->length; i++) vec->coeff[i]= a->coeff[i];

  1385. 

  1386.     return vec;

  1387. }

  1388. 

  1389. void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)

  1390. {

  1391.     int i;

  1392.     double max=0;

  1393.     double min=0;

  1394.     double range;

  1395. 

  1396.     for (i=0; i<a->length; i++)

  1397.         if (a->coeff[i]>max) max= a->coeff[i];

  1398. 

  1399.     for (i=0; i<a->length; i++)

  1400.         if (a->coeff[i]<min) min= a->coeff[i];

  1401. 

  1402.     range= max - min;

  1403. 

  1404.     for (i=0; i<a->length; i++) {

  1405.         int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  1406.         av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);

  1407.         for (;x>0; x--) av_log(log_ctx, log_level, " ");

  1408.         av_log(log_ctx, log_level, "|\n");

  1409.     }

  1410. }

  1411. 

  1412. void sws_freeVec(SwsVector *a)

  1413. {

  1414.     if (!a) return;

  1415.     av_freep(&a->coeff);

  1416.     a->length=0;

  1417.     av_free(a);

  1418. }

  1419. 

  1420. void sws_freeFilter(SwsFilter *filter)

  1421. {

  1422.     if (!filter) return;

  1423. 

  1424.     if (filter->lumH) sws_freeVec(filter->lumH);

  1425.     if (filter->lumV) sws_freeVec(filter->lumV);

  1426.     if (filter->chrH) sws_freeVec(filter->chrH);

  1427.     if (filter->chrV) sws_freeVec(filter->chrV);

  1428.     av_free(filter);

  1429. }

  1430. 

  1431. void sws_freeContext(SwsContext *c)

  1432. {

  1433.     int i;

  1434.     if (!c) return;

  1435. 

  1436.     if (c->lumPixBuf) {

  1437.         for (i=0; i<c->vLumBufSize; i++)

  1438.             av_freep(&c->lumPixBuf[i]);

  1439.         av_freep(&c->lumPixBuf);

  1440.     }

  1441. 

  1442.     if (c->chrUPixBuf) {

  1443.         for (i=0; i<c->vChrBufSize; i++)

  1444.             av_freep(&c->chrUPixBuf[i]);

  1445.         av_freep(&c->chrUPixBuf);

  1446.         av_freep(&c->chrVPixBuf);

  1447.     }

  1448. 

  1449.     if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {

  1450.         for (i=0; i<c->vLumBufSize; i++)

  1451.             av_freep(&c->alpPixBuf[i]);

  1452.         av_freep(&c->alpPixBuf);

  1453.     }

  1454. 

  1455.     av_freep(&c->vLumFilter);

  1456.     av_freep(&c->vChrFilter);

  1457.     av_freep(&c->hLumFilter);

  1458.     av_freep(&c->hChrFilter);

  1459. #if HAVE_ALTIVEC

  1460.     av_freep(&c->vYCoeffsBank);

  1461.     av_freep(&c->vCCoeffsBank);

  1462. #endif

  1463. 

  1464.     av_freep(&c->vLumFilterPos);

  1465.     av_freep(&c->vChrFilterPos);

  1466.     av_freep(&c->hLumFilterPos);

  1467.     av_freep(&c->hChrFilterPos);

  1468. 

  1469. #if HAVE_MMX

  1470. #ifdef MAP_ANONYMOUS

  1471.     if (c->lumMmx2FilterCode) munmap(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize);

  1472.     if (c->chrMmx2FilterCode) munmap(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize);

  1473. #elif HAVE_VIRTUALALLOC

  1474.     if (c->lumMmx2FilterCode) VirtualFree(c->lumMmx2FilterCode, 0, MEM_RELEASE);

  1475.     if (c->chrMmx2FilterCode) VirtualFree(c->chrMmx2FilterCode, 0, MEM_RELEASE);

  1476. #else

  1477.     av_free(c->lumMmx2FilterCode);

  1478.     av_free(c->chrMmx2FilterCode);

  1479. #endif

  1480.     c->lumMmx2FilterCode=NULL;

  1481.     c->chrMmx2FilterCode=NULL;

  1482. #endif /* HAVE_MMX */

  1483. 

  1484.     av_freep(&c->yuvTable);

  1485.     av_free(c->formatConvBuffer);

  1486. 

  1487.     av_free(c);

  1488. }

  1489. 

  1490. struct SwsContext *sws_getCachedContext(struct SwsContext *context,

  1491.                                         int srcW, int srcH, enum PixelFormat srcFormat,

  1492.                                         int dstW, int dstH, enum PixelFormat dstFormat, int flags,

  1493.                                         SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)

  1494. {

  1495.     static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};

  1496. 

  1497.     if (!param)

  1498.         param = default_param;

  1499. 

  1500.     if (context &&

  1501.         (context->srcW      != srcW      ||

  1502.          context->srcH      != srcH      ||

  1503.          context->srcFormat != srcFormat ||

  1504.          context->dstW      != dstW      ||

  1505.          context->dstH      != dstH      ||

  1506.          context->dstFormat != dstFormat ||

  1507.          context->flags     != flags     ||

  1508.          context->param[0]  != param[0]  ||

  1509.          context->param[1]  != param[1])) {

  1510.         sws_freeContext(context);

  1511.         context = NULL;

  1512.     }

  1513. 

  1514.     if (!context) {

  1515.         if (!(context = sws_alloc_context()))

  1516.             return NULL;

  1517.         context->srcW      = srcW;

  1518.         context->srcH      = srcH;

  1519.         context->srcRange  = handle_jpeg(&srcFormat);

  1520.         context->srcFormat = srcFormat;

  1521.         context->dstW      = dstW;

  1522.         context->dstH      = dstH;

  1523.         context->dstRange  = handle_jpeg(&dstFormat);

  1524.         context->dstFormat = dstFormat;

  1525.         context->flags     = flags;

  1526.         context->param[0]  = param[0];

  1527.         context->param[1]  = param[1];

  1528.         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);

  1529.         if (sws_init_context(context, srcFilter, dstFilter) < 0) {

  1530.             sws_freeContext(context);

  1531.             return NULL;

  1532.         }

  1533.     }

  1534.     return context;

  1535. }