libmpcodecs/vf_divtc.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <limits.h>
  23 #include <math.h>
  24
  25 #include "config.h"
  26 #include "mp_msg.h"
  27 #include "cpudetect.h"
  28 #include "libavutil/common.h"
  29 #include "mpbswap.h"
  30
  31 #include "img_format.h"
  32 #include "mp_image.h"
  33 #include "vf.h"
  34
  35 #include "libvo/fastmemcpy.h"
  36
  37 const vf_info_t vf_info_divtc;
  38
  39 struct vf_priv_s
  40    {
  41    int deghost, pass, phase, window, fcount, bcount, frameno, misscount,
  42       ocount, sum[5];
  43    double threshold;
  44    FILE *file;
  45    char *bdata;
  46    unsigned int *csdata;
  47    int *history;
  48    };
  49
  50 /*
  51  * diff_MMX and diff_C stolen from vf_decimate.c
  52  */
  53
  54 #if HAVE_MMX && HAVE_EBX_AVAILABLE
  55 static int diff_MMX(unsigned char *old, unsigned char *new, int os, int ns)
  56    {
  57    volatile short out[4];
  58    __asm__ (
  59         "movl $8, %%ecx \n\t"
  60         "pxor %%mm4, %%mm4 \n\t"
  61         "pxor %%mm7, %%mm7 \n\t"
  62
  63         ASMALIGN(4)
  64         "1: \n\t"
  65
  66         "movq (%%"REG_S"), %%mm0 \n\t"
  67         "movq (%%"REG_S"), %%mm2 \n\t"
  68         "add %%"REG_a", %%"REG_S" \n\t"
  69         "movq (%%"REG_D"), %%mm1 \n\t"
  70         "add %%"REG_b", %%"REG_D" \n\t"
  71         "psubusb %%mm1, %%mm2 \n\t"
  72         "psubusb %%mm0, %%mm1 \n\t"
  73         "movq %%mm2, %%mm0 \n\t"
  74         "movq %%mm1, %%mm3 \n\t"
  75         "punpcklbw %%mm7, %%mm0 \n\t"
  76         "punpcklbw %%mm7, %%mm1 \n\t"
  77         "punpckhbw %%mm7, %%mm2 \n\t"
  78         "punpckhbw %%mm7, %%mm3 \n\t"
  79         "paddw %%mm0, %%mm4 \n\t"
  80         "paddw %%mm1, %%mm4 \n\t"
  81         "paddw %%mm2, %%mm4 \n\t"
  82         "paddw %%mm3, %%mm4 \n\t"
  83
  84         "decl %%ecx \n\t"
  85         "jnz 1b \n\t"
  86         "movq %%mm4, (%%"REG_d") \n\t"
  87         "emms \n\t"
  88         :
  89         : "S" (old), "D" (new), "a" ((long)os), "b" ((long)ns), "d" (out)
  90         : "%ecx", "memory"
  91         );
  92    return out[0]+out[1]+out[2]+out[3];
  93    }
  94 #endif
  95
  96 static int diff_C(unsigned char *old, unsigned char *new, int os, int ns)
  97    {
  98    int x, y, d=0;
  99
 100    for(y=8; y; y--, new+=ns, old+=os)
 101       for(x=8; x; x--)
 102          d+=abs(new[x]-old[x]);
 103
 104    return d;
 105    }
 106
 107 static int (*diff)(unsigned char *, unsigned char *, int, int);
 108
 109 static int diff_plane(unsigned char *old, unsigned char *new,
 110                       int w, int h, int os, int ns, int arg)
 111    {
 112    int x, y, d, max=0, sum=0, n=0;
 113
 114    for(y=0; y<h-7; y+=8)
 115       {
 116       for(x=0; x<w-7; x+=8)
 117          {
 118          d=diff(old+x+y*os, new+x+y*ns, os, ns);
 119          if(d>max) max=d;
 120          sum+=d;
 121          n++;
 122          }
 123       }
 124
 125    return (sum+n*max)/2;
 126    }
 127
 128 /*
 129 static unsigned int checksum_plane(unsigned char *p, unsigned char *z,
 130                                    int w, int h, int s, int zs, int arg)
 131    {
 132    unsigned int shift, sum;
 133    unsigned char *e;
 134
 135    for(sum=0; h; h--, p+=s-w)
 136       for(e=p+w, shift=32; p<e;)
 137          sum^=(*p++)<<(shift=(shift-8)&31);
 138
 139    return sum;
 140    }
 141 */
 142
 143 static unsigned int checksum_plane(unsigned char *p, unsigned char *z,
 144                                    int w, int h, int s, int zs, int arg)
 145    {
 146    unsigned int shift;
 147    uint32_t sum, t;
 148    unsigned char *e, *e2;
 149 #if HAVE_FAST_64BIT
 150    typedef uint64_t wsum_t;
 151 #else
 152    typedef uint32_t wsum_t;
 153 #endif
 154    wsum_t wsum;
 155
 156    for(sum=0; h; h--, p+=s-w)
 157       {
 158       for(shift=0, e=p+w; (int)p&(sizeof(wsum_t)-1) && p<e;)
 159          sum^=*p++<<(shift=(shift-8)&31);
 160
 161       for(wsum=0, e2=e-sizeof(wsum_t)+1; p<e2; p+=sizeof(wsum_t))
 162          wsum^=*(wsum_t *)p;
 163
 164 #if HAVE_FAST_64BIT
 165       t=be2me_32((uint32_t)(wsum>>32^wsum));
 166 #else
 167       t=be2me_32(wsum);
 168 #endif
 169
 170       for(sum^=(t<<shift|t>>(32-shift)); p<e;)
 171          sum^=*p++<<(shift=(shift-8)&31);
 172       }
 173
 174    return sum;
 175    }
 176
 177 static int deghost_plane(unsigned char *d, unsigned char *s,
 178                          int w, int h, int ds, int ss, int threshold)
 179    {
 180    int t;
 181    unsigned char *e;
 182
 183    for(; h; h--, s+=ss-w, d+=ds-w)
 184       for(e=d+w; d<e; d++, s++)
 185          if(abs(*d-*s)>=threshold)
 186             *d=(t=(*d<<1)-*s)<0?0:t>255?255:t;
 187
 188    return 0;
 189    }
 190
 191 static int copyop(unsigned char *d, unsigned char *s, int bpl, int h, int dstride, int sstride, int dummy) {
 192   memcpy_pic(d, s, bpl, h, dstride, sstride);
 193   return 0;
 194 }
 195
 196 static int imgop(int(*planeop)(unsigned char *, unsigned char *,
 197                                int, int, int, int, int),
 198                  mp_image_t *dst, mp_image_t *src, int arg)
 199    {
 200    if(dst->flags&MP_IMGFLAG_PLANAR)
 201       return planeop(dst->planes[0], src?src->planes[0]:0,
 202                      dst->w, dst->h,
 203                      dst->stride[0], src?src->stride[0]:0, arg)+
 204              planeop(dst->planes[1], src?src->planes[1]:0,
 205                      dst->chroma_width, dst->chroma_height,
 206                      dst->stride[1], src?src->stride[1]:0, arg)+
 207              planeop(dst->planes[2], src?src->planes[2]:0,
 208                      dst->chroma_width, dst->chroma_height,
 209                      dst->stride[2], src?src->stride[2]:0, arg);
 210
 211    return planeop(dst->planes[0], src?src->planes[0]:0,
 212                   dst->w*(dst->bpp/8), dst->h,
 213                   dst->stride[0], src?src->stride[0]:0, arg);
 214    }
 215
 216 /*
 217  * Find the phase in which the telecine pattern fits best to the
 218  * given 5 frame slice of frame difference measurements.
 219  *
 220  * If phase1 and phase2 are not negative, only the two specified
 221  * phases are tested.
 222  */
 223
 224 static int match(struct vf_priv_s *p, int *diffs,
 225                  int phase1, int phase2, double *strength)
 226    {
 227    static const int pattern1[]={ -4,  1, 1, 1, 1 },
 228       pattern2[]={ -2, -3, 4, 4, -3 }, *pattern;
 229    int f, m, n, t[5];
 230
 231    pattern=p->deghost>0?pattern2:pattern1;
 232
 233    for(f=0; f<5; f++)
 234       {
 235       if(phase1<0 || phase2<0 || f==phase1 || f==phase2)
 236          {
 237          for(n=t[f]=0; n<5; n++)
 238             t[f]+=diffs[n]*pattern[(n-f+5)%5];
 239          }
 240       else
 241          t[f]=INT_MIN;
 242       }
 243
 244    /* find the best match */
 245    for(m=0, n=1; n<5; n++)
 246       if(t[n]>t[m]) m=n;
 247
 248    if(strength)
 249       {
 250       /* the second best match */
 251       for(f=m?0:1, n=f+1; n<5; n++)
 252          if(n!=m && t[n]>t[f]) f=n;
 253
 254       *strength=(t[m]>0?(double)(t[m]-t[f])/t[m]:0.0);
 255       }
 256
 257    return m;
 258    }
 259
 260 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
 261    {
 262    mp_image_t *dmpi, *tmpi=0;
 263    int n, m, f, newphase;
 264    struct vf_priv_s *p=vf->priv;
 265    unsigned int checksum;
 266    double d;
 267
 268    dmpi=vf_get_image(vf->next, mpi->imgfmt,
 269                      MP_IMGTYPE_STATIC, MP_IMGFLAG_ACCEPT_STRIDE |
 270                      MP_IMGFLAG_PRESERVE | MP_IMGFLAG_READABLE,
 271                      mpi->width, mpi->height);
 272    vf_clone_mpi_attributes(dmpi, mpi);
 273
 274    newphase=p->phase;
 275
 276    switch(p->pass)
 277       {
 278       case 1:
 279          fprintf(p->file, "%08x %d\n",
 280                  (unsigned int)imgop((void *)checksum_plane, mpi, 0, 0),
 281                  p->frameno?imgop(diff_plane, dmpi, mpi, 0):0);
 282          break;
 283
 284       case 2:
 285          if(p->frameno/5>p->bcount)
 286             {
 287             mp_msg(MSGT_VFILTER, MSGL_ERR,
 288                    "\n%s: Log file ends prematurely! "
 289                    "Switching to one pass mode.\n", vf->info->name);
 290             p->pass=0;
 291             break;
 292             }
 293
 294          checksum=(unsigned int)imgop((void *)checksum_plane, mpi, 0, 0);
 295
 296          if(checksum!=p->csdata[p->frameno])
 297             {
 298             for(f=0; f<100; f++)
 299                if(p->frameno+f<p->fcount && p->csdata[p->frameno+f]==checksum)
 300                   break;
 301                else if(p->frameno-f>=0 && p->csdata[p->frameno-f]==checksum)
 302                   {
 303                   f=-f;
 304                   break;
 305                   }
 306
 307             if(f<100)
 308                {
 309                mp_msg(MSGT_VFILTER, MSGL_INFO,
 310                       "\n%s: Mismatch with pass-1: %+d frame(s).\n",
 311                       vf->info->name, f);
 312
 313                p->frameno+=f;
 314                p->misscount=0;
 315                }
 316             else if(p->misscount++>=30)
 317                {
 318                mp_msg(MSGT_VFILTER, MSGL_ERR,
 319                       "\n%s: Sync with pass-1 lost! "
 320                       "Switching to one pass mode.\n", vf->info->name);
 321                p->pass=0;
 322                break;
 323                }
 324             }
 325
 326          n=(p->frameno)/5;
 327          if(n>=p->bcount) n=p->bcount-1;
 328
 329          newphase=p->bdata[n];
 330          break;
 331
 332       default:
 333          if(p->frameno)
 334             {
 335             int *sump=p->sum+p->frameno%5,
 336                *histp=p->history+p->frameno%p->window;
 337
 338             *sump-=*histp;
 339             *sump+=(*histp=imgop(diff_plane, dmpi, mpi, 0));
 340             }
 341
 342          m=match(p, p->sum, -1, -1, &d);
 343
 344          if(d>=p->threshold)
 345             newphase=m;
 346       }
 347
 348    n=p->ocount++%5;
 349
 350    if(newphase!=p->phase && ((p->phase+4)%5<n)==((newphase+4)%5<n))
 351       {
 352       p->phase=newphase;
 353       mp_msg(MSGT_VFILTER, MSGL_STATUS,
 354              "\n%s: Telecine phase %d.\n", vf->info->name, p->phase);
 355       }
 356
 357    switch((p->frameno++-p->phase+10)%5)
 358       {
 359       case 0:
 360          imgop(copyop, dmpi, mpi, 0);
 361          return 0;
 362
 363       case 4:
 364          if(p->deghost>0)
 365             {
 366             tmpi=vf_get_image(vf->next, mpi->imgfmt,
 367                               MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE |
 368                               MP_IMGFLAG_READABLE,
 369                               mpi->width, mpi->height);
 370             vf_clone_mpi_attributes(tmpi, mpi);
 371
 372             imgop(copyop, tmpi, mpi, 0);
 373             imgop(deghost_plane, tmpi, dmpi, p->deghost);
 374             imgop(copyop, dmpi, mpi, 0);
 375             return vf_next_put_image(vf, tmpi, MP_NOPTS_VALUE);
 376             }
 377       }
 378
 379    imgop(copyop, dmpi, mpi, 0);
 380    return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
 381    }
 382
 383 static int analyze(struct vf_priv_s *p)
 384    {
 385    int *buf=0, *bp, bufsize=0, n, b, f, i, j, m, s;
 386    unsigned int *cbuf=0, *cp;
 387    char *pbuf;
 388    char lbuf[256];
 389    int sum[5];
 390    double d;
 391
 392    /* read the file */
 393
 394    n=15;
 395    while(fgets(lbuf, 256, p->file))
 396       {
 397       if(n>=bufsize-19)
 398          {
 399          bufsize=bufsize?bufsize*2:30000;
 400          if((bp=realloc(buf, bufsize*sizeof *buf))) buf=bp;
 401          if((cp=realloc(cbuf, bufsize*sizeof *cbuf))) cbuf=cp;
 402
 403          if(!bp || !cp)
 404             {
 405             mp_msg(MSGT_VFILTER, MSGL_FATAL, "%s: Not enough memory.\n",
 406                    vf_info_divtc.name);
 407             free(buf);
 408             free(cbuf);
 409             return 0;
 410             }
 411          }
 412       sscanf(lbuf, "%x %d", cbuf+n, buf+n);
 413       n++;
 414       }
 415
 416    if(!n)
 417       {
 418       mp_msg(MSGT_VFILTER, MSGL_FATAL, "%s: Empty 2-pass log file.\n",
 419              vf_info_divtc.name);
 420       free(buf);
 421       free(cbuf);
 422       return 0;
 423       }
 424
 425    /* generate some dummy data past the beginning and end of the array */
 426
 427    buf+=15, cbuf+=15;
 428    n-=15;
 429
 430    memcpy(buf-15, buf, 15*sizeof *buf);
 431    memset(cbuf-15, 0, 15*sizeof *cbuf);
 432
 433    while(n%5)
 434       buf[n]=buf[n-5], cbuf[n]=0, n++;
 435
 436    memcpy(buf+n, buf+n-15, 15*sizeof *buf);
 437    memset(cbuf+n, 0, 15*sizeof *cbuf);
 438
 439    p->csdata=cbuf;
 440    p->fcount=n;
 441
 442    /* array with one slot for each slice of 5 frames */
 443
 444    p->bdata=pbuf=malloc(p->bcount=b=(n/5));
 445    memset(pbuf, 255, b);
 446
 447    /* resolve the automatic mode */
 448
 449    if(p->deghost<0)
 450       {
 451       int deghost=-p->deghost;
 452       double s0=0.0, s1=0.0;
 453
 454       for(f=0; f<n; f+=5)
 455          {
 456          p->deghost=0; match(p, buf+f, -1, -1, &d); s0+=d;
 457          p->deghost=1; match(p, buf+f, -1, -1, &d); s1+=d;
 458          }
 459
 460       p->deghost=s1>s0?deghost:0;
 461
 462       mp_msg(MSGT_VFILTER, MSGL_INFO,
 463              "%s: Deghosting %-3s (relative pattern strength %+.2fdB).\n",
 464              vf_info_divtc.name,
 465              p->deghost?"ON":"OFF",
 466              10.0*log10(s1/s0));
 467       }
 468
 469    /* analyze the data */
 470
 471    for(f=0; f<5; f++)
 472       for(sum[f]=0, n=-15; n<20; n+=5)
 473          sum[f]+=buf[n+f];
 474
 475    for(f=0; f<b; f++)
 476       {
 477       m=match(p, sum, -1, -1, &d);
 478
 479       if(d>=p->threshold)
 480          pbuf[f]=m;
 481
 482       if(f<b-1)
 483          for(n=0; n<5; n++)
 484             sum[n]=sum[n]-buf[5*(f-3)+n]+buf[5*(f+4)+n];
 485       }
 486
 487    /* fill in the gaps */
 488
 489    /* the beginning */
 490    for(f=0; f<b && pbuf[f]==-1; f++);
 491
 492    if(f==b)
 493       {
 494       free(buf-15);
 495       mp_msg(MSGT_VFILTER, MSGL_FATAL, "%s: No telecine pattern found!\n",
 496              vf_info_divtc.name);
 497       return 0;
 498       }
 499
 500    for(n=0; n<f; pbuf[n++]=pbuf[f]);
 501
 502    /* the end */
 503    for(f=b-1; pbuf[f]==-1; f--);
 504    for(n=f+1; n<b; pbuf[n++]=pbuf[f]);
 505
 506    /* the rest */
 507    for(f=0;;)
 508       {
 509       while(f<b && pbuf[f]!=-1) f++;
 510       if(f==b) break;
 511       for(n=f; pbuf[n]==-1; n++);
 512
 513       if(pbuf[f-1]==pbuf[n])
 514          {
 515          /* just a gap */
 516          while(f<n) pbuf[f++]=pbuf[n];
 517          }
 518       else
 519          {
 520          /* phase change, reanalyze the original data in the gap with zero
 521             threshold for only the two phases that appear at the ends */
 522
 523          for(i=0; i<5; i++)
 524             for(sum[i]=0, j=5*f-15; j<5*f; j+=5)
 525                sum[i]+=buf[i+j];
 526
 527          for(i=f; i<n; i++)
 528             {
 529             pbuf[i]=match(p, sum, pbuf[f-1], pbuf[n], 0);
 530
 531             for(j=0; j<5; j++)
 532                sum[j]=sum[j]-buf[5*(i-3)+j]+buf[5*(i+4)+j];
 533             }
 534
 535          /* estimate the transition point by dividing the gap
 536             in the same proportion as the number of matches of each kind */
 537
 538          for(i=f, m=f; i<n; i++)
 539             if(pbuf[i]==pbuf[f-1]) m++;
 540
 541          /* find the transition of the right direction nearest to the
 542             estimated point */
 543
 544          if(m>f && m<n)
 545             {
 546             for(j=m; j>f; j--)
 547                if(pbuf[j-1]==pbuf[f-1] && pbuf[j]==pbuf[n]) break;
 548             for(s=m; s<n; s++)
 549                if(pbuf[s-1]==pbuf[f-1] && pbuf[s]==pbuf[n]) break;
 550
 551             m=(s-m<m-j)?s:j;
 552             }
 553
 554          /* and rewrite the data to allow only this one transition */
 555
 556          for(i=f; i<m; i++)
 557             pbuf[i]=pbuf[f-1];
 558
 559          for(; i<n; i++)
 560             pbuf[i]=pbuf[n];
 561
 562          f=n;
 563          }
 564       }
 565
 566    free(buf-15);
 567
 568    return 1;
 569    }
 570
 571 static int query_format(struct vf_instance *vf, unsigned int fmt)
 572    {
 573    switch(fmt)
 574       {
 575       case IMGFMT_444P: case IMGFMT_IYUV: case IMGFMT_RGB24:
 576       case IMGFMT_422P: case IMGFMT_UYVY: case IMGFMT_BGR24:
 577       case IMGFMT_411P: case IMGFMT_YUY2: case IMGFMT_IF09:
 578       case IMGFMT_YV12: case IMGFMT_I420: case IMGFMT_YVU9:
 579       case IMGFMT_IUYV: case IMGFMT_Y800: case IMGFMT_Y8:
 580          return vf_next_query_format(vf,fmt);
 581       }
 582
 583    return 0;
 584    }
 585
 586 static void uninit(struct vf_instance *vf)
 587    {
 588    if(vf->priv)
 589       {
 590       if(vf->priv->file) fclose(vf->priv->file);
 591       if(vf->priv->csdata) free(vf->priv->csdata-15);
 592       free(vf->priv->bdata);
 593       free(vf->priv->history);
 594       free(vf->priv);
 595       }
 596    }
 597
 598 static int vf_open(vf_instance_t *vf, char *args)
 599    {
 600    struct vf_priv_s *p;
 601    char *filename="framediff.log", *ap, *q, *a;
 602
 603    if(args && !(args=strdup(args)))
 604       {
 605    nomem:
 606       mp_msg(MSGT_VFILTER, MSGL_FATAL,
 607              "%s: Not enough memory.\n", vf->info->name);
 608    fail:
 609       uninit(vf);
 610       free(args);
 611       return 0;
 612       }
 613
 614    vf->put_image=put_image;
 615    vf->uninit=uninit;
 616    vf->query_format=query_format;
 617    vf->default_reqs=VFCAP_ACCEPT_STRIDE;
 618    if(!(vf->priv=p=calloc(1, sizeof(struct vf_priv_s))))
 619       goto nomem;
 620
 621    p->phase=5;
 622    p->threshold=0.5;
 623    p->window=30;
 624
 625    if((ap=args))
 626       while(*ap)
 627          {
 628          q=ap;
 629          if((ap=strchr(q, ':'))) *ap++=0; else ap=q+strlen(q);
 630          if((a=strchr(q, '='))) *a++=0; else a=q+strlen(q);
 631
 632          switch(*q)
 633             {
 634             case 0:                              break;
 635             case 'f': filename=a;                break;
 636             case 't': p->threshold=atof(a);      break;
 637             case 'w': p->window=5*(atoi(a)+4)/5; break;
 638             case 'd': p->deghost=atoi(a);        break;
 639             case 'p':
 640                if(q[1]=='h') p->phase=atoi(a);
 641                else p->pass=atoi(a);
 642                break;
 643
 644             case 'h':
 645                mp_msg(MSGT_VFILTER, MSGL_INFO,
 646                       "\n%s options:\n\n"
 647                       "pass=1|2         - Use 2-pass mode.\n"
 648                       "file=filename    - Set the 2-pass log file name "
 649                       "(default %s).\n"
 650                       "threshold=value  - Set the pattern recognition "
 651                       "sensitivity (default %g).\n"
 652                       "deghost=value    - Select deghosting threshold "
 653                       "(default %d).\n"
 654                       "window=numframes - Set the statistics window "
 655                       "for 1-pass mode (default %d).\n"
 656                       "phase=0|1|2|3|4  - Set the initial phase "
 657                       "for 1-pass mode (default %d).\n\n"
 658                       "The option names can be abbreviated to the shortest "
 659                       "unique prefix.\n\n",
 660                       vf->info->name, filename, p->threshold, p->deghost,
 661                       p->window, p->phase%5);
 662                break;
 663
 664             default:
 665                mp_msg(MSGT_VFILTER, MSGL_FATAL,
 666                       "%s: Unknown argument %s.\n", vf->info->name, q);
 667                goto fail;
 668             }
 669          }
 670
 671    switch(p->pass)
 672       {
 673       case 1:
 674          if(!(p->file=fopen(filename, "w")))
 675             {
 676             mp_msg(MSGT_VFILTER, MSGL_FATAL,
 677                    "%s: Can't create file %s.\n", vf->info->name, filename);
 678             goto fail;
 679             }
 680
 681          break;
 682
 683       case 2:
 684          if(!(p->file=fopen(filename, "r")))
 685             {
 686             mp_msg(MSGT_VFILTER, MSGL_FATAL,
 687                    "%s: Can't open file %s.\n", vf->info->name, filename);
 688             goto fail;
 689             }
 690
 691          if(!analyze(p))
 692             goto fail;
 693
 694          fclose(p->file);
 695          p->file=0;
 696          break;
 697       }
 698
 699    if(p->window<5) p->window=5;
 700    if(!(p->history=calloc(sizeof *p->history, p->window)))
 701       goto nomem;
 702
 703    diff = diff_C;
 704 #if HAVE_MMX && HAVE_EBX_AVAILABLE
 705    if(gCpuCaps.hasMMX) diff = diff_MMX;
 706 #endif
 707
 708    free(args);
 709    return 1;
 710    }
 711
 712 const vf_info_t vf_info_divtc =
 713    {
 714    "inverse telecine for deinterlaced video",
 715    "divtc",
 716    "Ville Saari",
 717    "",
 718    vf_open,
 719    NULL
 720    };