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ffmpeg / libavfilter / libmpcodecs / vf_divtc.c @ e4852fb3

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/*
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
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
8
 *
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 * 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
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License along
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 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
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 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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 */
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19
#include <stdio.h>
20
#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <math.h>
24

    
25
#include "config.h"
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#include "mp_msg.h"
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#include "cpudetect.h"
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#include "libavutil/common.h"
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#include "mpbswap.h"
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31
#include "img_format.h"
32
#include "mp_image.h"
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#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;
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   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
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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

    
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        "movq (%%"REG_S"), %%mm0 \n\t"
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        "movq (%%"REG_S"), %%mm2 \n\t"
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        "add %%"REG_a", %%"REG_S" \n\t"
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        "movq (%%"REG_D"), %%mm1 \n\t"
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        "add %%"REG_b", %%"REG_D" \n\t"
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        "psubusb %%mm1, %%mm2 \n\t"
72
        "psubusb %%mm0, %%mm1 \n\t"
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        "movq %%mm2, %%mm0 \n\t"
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        "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"
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        "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,
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                     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
   };