libhb/detelecine.c

   1 #include "hb.h"
   2 #include "ffmpeg/avcodec.h"
   3 #include "mpeg2dec/mpeg2.h"
   4
   5 /*
   6  *
   7  * PULLUP DEFINITIONS
   8  *
   9  */
  10
  11 #define PULLUP_FMT_Y         1
  12 #define PULLUP_HAVE_BREAKS   1
  13 #define PULLUP_HAVE_AFFINITY 2
  14 #define PULLUP_BREAK_LEFT    1
  15 #define PULLUP_BREAK_RIGHT   2
  16
  17 #define PULLUP_ABS( a ) (((a)^((a)>>31))-((a)>>31))
  18
  19 #ifndef PIC_FLAG_REPEAT_FIRST_FIELD
  20 #define PIC_FLAG_REPEAT_FIRST_FIELD 256
  21 #endif
  22
  23 struct pullup_buffer
  24 {
  25         int lock[2];
  26         unsigned char **planes;
  27 };
  28
  29 struct pullup_field
  30 {
  31         int parity;
  32         struct pullup_buffer *buffer;
  33         unsigned int flags;
  34         int breaks;
  35         int affinity;
  36         int *diffs;
  37         int *comb;
  38         int *var;
  39         struct pullup_field *prev, *next;
  40 };
  41
  42 struct pullup_frame
  43 {
  44         int lock;
  45         int length;
  46         int parity;
  47         struct pullup_buffer **ifields, *ofields[2];
  48         struct pullup_buffer *buffer;
  49 };
  50
  51 struct pullup_context
  52 {
  53         /* Public interface */
  54         int format;
  55         int nplanes;
  56         int *bpp, *w, *h, *stride, *background;
  57         unsigned int cpu;
  58         int junk_left, junk_right, junk_top, junk_bottom;
  59         int verbose;
  60         int metric_plane;
  61         int strict_breaks;
  62         int strict_pairs;
  63         /* Internal data */
  64         struct pullup_field *first, *last, *head;
  65         struct pullup_buffer *buffers;
  66         int nbuffers;
  67         int (*diff)(unsigned char *, unsigned char *, int);
  68         int (*comb)(unsigned char *, unsigned char *, int);
  69         int (*var)(unsigned char *, unsigned char *, int);
  70         int metric_w, metric_h, metric_len, metric_offset;
  71         struct pullup_frame *frame;
  72 };
  73
  74 /*
  75  *
  76  * DETELECINE FILTER DEFINITIONS
  77  *
  78  */
  79
  80 struct hb_filter_private_s
  81 {
  82     int              pix_fmt;
  83     int              width[3];
  84     int              height[3];
  85
  86     struct pullup_context * pullup_ctx;
  87     int                     pullup_fakecount;
  88     int                     pullup_skipflag;
  89
  90     AVPicture        pic_in;
  91     AVPicture        pic_out;
  92     hb_buffer_t    * buf_out;
  93 };
  94
  95 hb_filter_private_t * hb_detelecine_init( int pix_fmt,
  96                                           int width,
  97                                           int height,
  98                                           char * settings );
  99
 100 int hb_detelecine_work( const hb_buffer_t * buf_in,
 101                         hb_buffer_t ** buf_out,
 102                         int pix_fmt,
 103                         int width,
 104                         int height,
 105                         hb_filter_private_t * pv );
 106
 107 void hb_detelecine_close( hb_filter_private_t * pv );
 108
 109 hb_filter_object_t hb_filter_detelecine =
 110 {
 111     FILTER_DETELECINE,
 112     "Detelecine (pullup)",
 113     NULL,
 114     hb_detelecine_init,
 115     hb_detelecine_work,
 116     hb_detelecine_close,
 117 };
 118
 119 /*
 120  *
 121  * PULLUP STATIC FUNCTIONS
 122  *
 123  */
 124
 125 static int pullup_diff_y( unsigned char  *a, unsigned char * b, int s )
 126 {
 127         int i, j, diff = 0;
 128         for( i = 4; i; i-- )
 129     {
 130                 for( j = 0; j < 8; j++ )
 131         {
 132             diff += PULLUP_ABS( a[j]-b[j] );
 133         }
 134                 a+=s; b+=s;
 135         }
 136         return diff;
 137 }
 138
 139 static int pullup_licomb_y( unsigned char * a, unsigned char * b, int s )
 140 {
 141         int i, j, diff = 0;
 142         for( i = 4; i; i-- )
 143     {
 144                 for( j = 0; j < 8; j++ )
 145         {
 146                         diff += PULLUP_ABS( (a[j]<<1) - b[j-s] - b[j] )
 147                                   + PULLUP_ABS( (b[j]<<1) - a[j] - a[j+s] );
 148         }
 149                 a+=s; b+=s;
 150         }
 151         return diff;
 152 }
 153
 154 static int pullup_var_y( unsigned char * a, unsigned char * b, int s )
 155 {
 156         int i, j, var = 0;
 157         for( i = 3; i; i-- )
 158     {
 159                 for( j = 0; j < 8; j++ )
 160         {
 161                         var += PULLUP_ABS( a[j]-a[j+s] );
 162                 }
 163                 a+=s; b+=s;
 164         }
 165         return 4*var;
 166 }
 167
 168 static void pullup_alloc_metrics( struct pullup_context * c,
 169                                   struct pullup_field * f )
 170 {
 171         f->diffs = calloc( c->metric_len, sizeof(int) );
 172         f->comb  = calloc( c->metric_len, sizeof(int) );
 173         f->var   = calloc( c->metric_len, sizeof(int) );
 174 }
 175
 176 static void pullup_compute_metric( struct pullup_context * c,
 177                                    struct pullup_field * fa, int pa,
 178                                    struct pullup_field * fb, int pb,
 179                                    int (* func)( unsigned char *,
 180                                                  unsigned char *, int),
 181                                    int * dest )
 182 {
 183         unsigned char *a, *b;
 184         int x, y;
 185         int mp    = c->metric_plane;
 186         int xstep = c->bpp[mp];
 187         int ystep = c->stride[mp]<<3;
 188         int s     = c->stride[mp]<<1; /* field stride */
 189         int w     = c->metric_w*xstep;
 190
 191         if( !fa->buffer || !fb->buffer ) return;
 192
 193         /* Shortcut for duplicate fields (e.g. from RFF flag) */
 194         if( fa->buffer == fb->buffer && pa == pb )
 195     {
 196                 memset( dest, 0, c->metric_len * sizeof(int) );
 197                 return;
 198         }
 199
 200         a = fa->buffer->planes[mp] + pa * c->stride[mp] + c->metric_offset;
 201         b = fb->buffer->planes[mp] + pb * c->stride[mp] + c->metric_offset;
 202
 203         for( y = c->metric_h; y; y-- )
 204     {
 205                 for( x = 0; x < w; x += xstep )
 206         {
 207                         *dest++ = func( a + x, b + x, s );
 208                 }
 209                 a += ystep; b += ystep;
 210         }
 211 }
 212
 213 static struct pullup_field * pullup_make_field_queue( struct pullup_context * c,
 214                                                       int len )
 215 {
 216         struct pullup_field * head, * f;
 217         f = head = calloc( 1, sizeof(struct pullup_field) );
 218         pullup_alloc_metrics( c, f );
 219         for ( ; len > 0; len-- )
 220     {
 221                 f->next = calloc( 1, sizeof(struct pullup_field) );
 222                 f->next->prev = f;
 223                 f = f->next;
 224                 pullup_alloc_metrics( c, f );
 225         }
 226         f->next = head;
 227         head->prev = f;
 228         return head;
 229 }
 230
 231 static void pullup_check_field_queue( struct pullup_context * c )
 232 {
 233         if( c->head->next == c->first )
 234     {
 235                 struct pullup_field *f = calloc( 1, sizeof(struct pullup_field) );
 236                 pullup_alloc_metrics( c, f );
 237                 f->prev = c->head;
 238                 f->next = c->first;
 239                 c->head->next = f;
 240                 c->first->prev = f;
 241         }
 242 }
 243
 244 static void pullup_copy_field( struct pullup_context * c,
 245                                struct pullup_buffer * dest,
 246                                struct pullup_buffer * src,
 247                                int parity )
 248 {
 249         int i, j;
 250         unsigned char *d, *s;
 251         for( i = 0; i < c->nplanes; i++ )
 252     {
 253                 s = src->planes[i] + parity*c->stride[i];
 254                 d = dest->planes[i] + parity*c->stride[i];
 255                 for( j = c->h[i]>>1; j; j-- )
 256         {
 257                         memcpy( d, s, c->stride[i] );
 258                         s += c->stride[i]<<1;
 259                         d += c->stride[i]<<1;
 260                 }
 261         }
 262 }
 263
 264
 265 static int pullup_queue_length( struct pullup_field * begin,
 266                                 struct pullup_field * end )
 267 {
 268         int count = 1;
 269         struct pullup_field * f;
 270
 271         if( !begin || !end ) return 0;
 272         for( f = begin; f != end; f = f->next ) count++;
 273         return count;
 274 }
 275
 276 static int pullup_find_first_break( struct pullup_field * f, int max )
 277 {
 278         int i;
 279         for( i = 0; i < max; i++ )
 280     {
 281                 if( f->breaks & PULLUP_BREAK_RIGHT ||
 282             f->next->breaks & PULLUP_BREAK_LEFT )
 283         {
 284                         return i+1;
 285         }
 286                 f = f->next;
 287         }
 288         return 0;
 289 }
 290
 291 static void pullup_compute_breaks( struct pullup_context * c,
 292                                    struct pullup_field * f0 )
 293 {
 294         int i;
 295         struct pullup_field *f1 = f0->next;
 296         struct pullup_field *f2 = f1->next;
 297         struct pullup_field *f3 = f2->next;
 298         int l, max_l=0, max_r=0;
 299
 300         if( f0->flags & PULLUP_HAVE_BREAKS ) return;
 301         f0->flags |= PULLUP_HAVE_BREAKS;
 302
 303         /* Special case when fields are 100% identical */
 304         if( f0->buffer == f2->buffer && f1->buffer != f3->buffer )
 305     {
 306                 f2->breaks |= PULLUP_BREAK_RIGHT;
 307                 return;
 308         }
 309         if( f0->buffer != f2->buffer && f1->buffer == f3->buffer )
 310     {
 311                 f1->breaks |= PULLUP_BREAK_LEFT;
 312                 return;
 313         }
 314
 315         for( i = 0; i < c->metric_len; i++ )
 316     {
 317                 l = f2->diffs[i] - f3->diffs[i];
 318                 if(  l > max_l) max_l = l;
 319                 if( -l > max_r) max_r = -l;
 320         }
 321
 322         /* Don't get tripped up when differences are mostly quant error */
 323         if( max_l + max_r < 128 ) return;
 324         if( max_l > 4*max_r ) f1->breaks |= PULLUP_BREAK_LEFT;
 325         if( max_r > 4*max_l ) f2->breaks |= PULLUP_BREAK_RIGHT;
 326 }
 327
 328 static void pullup_compute_affinity( struct pullup_context * c,
 329                                      struct pullup_field * f )
 330 {
 331         int i;
 332         int max_l = 0, max_r = 0, l;
 333
 334     if( f->flags & PULLUP_HAVE_AFFINITY )
 335     {
 336         return;
 337     }
 338         f->flags |= PULLUP_HAVE_AFFINITY;
 339
 340         if( f->buffer == f->next->next->buffer )
 341     {
 342                 f->affinity             =  1;
 343                 f->next->affinity       =  0;
 344                 f->next->next->affinity = -1;
 345
 346                 f->next->flags       |= PULLUP_HAVE_AFFINITY;
 347                 f->next->next->flags |= PULLUP_HAVE_AFFINITY;
 348
 349                 return;
 350         }
 351
 352     for( i = 0; i < c->metric_len; i++ )
 353     {
 354         int lv = f->prev->var[i];
 355         int rv = f->next->var[i];
 356         int v  = f->var[i];
 357         int lc = f->comb[i] - (v+lv) + PULLUP_ABS( v-lv );
 358         int rc = f->next->comb[i] - (v+rv) + PULLUP_ABS( v-rv );
 359
 360         lc = (lc > 0) ? lc : 0;
 361         rc = (rc > 0) ? rc : 0;
 362         l = lc - rc;
 363         if(  l > max_l ) max_l = l;
 364         if( -l > max_r ) max_r = -l;
 365     }
 366
 367     if( max_l + max_r < 64 )
 368     {
 369         return;
 370     }
 371
 372     if( max_r > 6*max_l )
 373     {
 374         f->affinity = -1;
 375     }
 376     else if( max_l > 6*max_r )
 377     {
 378         f->affinity = 1;
 379     }
 380 }
 381
 382 static void pullup_foo( struct pullup_context * c )
 383 {
 384         struct pullup_field * f = c->first;
 385         int i, n = pullup_queue_length (f, c->last );
 386         for( i = 0; i < n-1; i++ )
 387     {
 388                 if( i < n-3 ) pullup_compute_breaks( c, f );
 389                 pullup_compute_affinity( c, f );
 390                 f = f->next;
 391         }
 392 }
 393
 394 static int pullup_decide_frame_length( struct pullup_context * c )
 395 {
 396         struct pullup_field *f0 = c->first;
 397         struct pullup_field *f1 = f0->next;
 398         struct pullup_field *f2 = f1->next;
 399         int l;
 400
 401         if( pullup_queue_length( c->first, c->last ) < 4 )
 402     {
 403         return 0;
 404     }
 405         pullup_foo( c );
 406
 407         if( f0->affinity == -1 ) return 1;
 408
 409         l = pullup_find_first_break( f0, 3 );
 410         if( l == 1 && c->strict_breaks < 0 ) l = 0;
 411
 412         switch (l)
 413     {
 414         case 1:
 415             if ( c->strict_breaks < 1 &&
 416                  f0->affinity == 1 &&
 417                  f1->affinity == -1 )
 418             {
 419                 return 2;
 420             }
 421             else
 422             {
 423                 return 1;
 424             }
 425
 426         case 2:
 427             /* FIXME: strictly speaking, f0->prev is no longer valid... :) */
 428             if( c->strict_pairs &&
 429                 (f0->prev->breaks & PULLUP_BREAK_RIGHT) &&
 430                 (f2->breaks & PULLUP_BREAK_LEFT) &&
 431                 (f0->affinity != 1 || f1->affinity != -1) )
 432             {
 433                 return 1;
 434             }
 435             if( f1->affinity == 1 )
 436             {
 437                 return 1;
 438             }
 439             else
 440             {
 441                 return 2;
 442             }
 443
 444         case 3:
 445             if( f2->affinity == 1 )
 446             {
 447                 return 2;
 448             }
 449             else
 450             {
 451                 return 3;
 452             }
 453
 454         default:
 455             /* 9 possibilities covered before switch */
 456             if( f1->affinity == 1 )
 457             {
 458                 return 1; /* covers 6 */
 459             }
 460             else if( f1->affinity == -1 )
 461             {
 462                 return 2; /* covers 6 */
 463             }
 464             else if( f2->affinity == -1 )
 465             {
 466                 /* covers 2 */
 467                 if( f0->affinity == 1 )
 468                 {
 469                     return 3;
 470                 }
 471                 else
 472                 {
 473                     return 1;
 474                 }
 475             }
 476             else
 477             {
 478                 return 2; /* the remaining 6 */
 479             }
 480         }
 481 }
 482
 483 static void pullup_print_aff_and_breaks(struct pullup_context * c,
 484                                         struct pullup_field * f )
 485 {
 486         int i;
 487         struct pullup_field * f0 = f;
 488         const char aff_l[] = "+..", aff_r[] = "..+";
 489         printf( "\naffinity: " );
 490         for( i = 0; i < 4; i++ )
 491     {
 492                 printf( "%c%d%c",
 493                 aff_l[1+f->affinity],
 494                 i,
 495                 aff_r[1+f->affinity] );
 496
 497                 f = f->next;
 498         }
 499         f = f0;
 500         printf("\nbreaks:   ");
 501         for( i = 0; i < 4; i++ )
 502     {
 503                 printf( "%c%d%c",
 504                 f->breaks & PULLUP_BREAK_LEFT  ? '|' : '.',
 505                 i,
 506                 f->breaks & PULLUP_BREAK_RIGHT ? '|' : '.' );
 507
 508                 f = f->next;
 509         }
 510         printf("\n");
 511 }
 512
 513 /*
 514  *
 515  * PULLUP CONTEXT FUNCTIONS
 516  *
 517  */
 518
 519 struct pullup_context * pullup_alloc_context( void )
 520 {
 521         struct pullup_context * c;
 522
 523         c = calloc( 1, sizeof(struct pullup_context)) ;
 524
 525         return c;
 526 }
 527
 528 void pullup_preinit_context( struct pullup_context * c )
 529 {
 530         c->bpp        = calloc( c->nplanes, sizeof(int) );
 531         c->w          = calloc( c->nplanes, sizeof(int) );
 532         c->h          = calloc( c->nplanes, sizeof(int) );
 533         c->stride     = calloc( c->nplanes, sizeof(int) );
 534         c->background = calloc( c->nplanes, sizeof(int) );
 535 }
 536
 537 void pullup_init_context( struct pullup_context * c )
 538 {
 539         int mp = c->metric_plane;
 540         if ( c->nbuffers < 10 )
 541     {
 542         c->nbuffers = 10;
 543     }
 544         c->buffers = calloc( c->nbuffers, sizeof (struct pullup_buffer) );
 545
 546         c->metric_w      = (c->w[mp] - ((c->junk_left + c->junk_right) << 3)) >> 3;
 547         c->metric_h      = (c->h[mp] - ((c->junk_top + c->junk_bottom) << 1)) >> 3;
 548         c->metric_offset = c->junk_left*c->bpp[mp] + (c->junk_top<<1)*c->stride[mp];
 549         c->metric_len    = c->metric_w * c->metric_h;
 550
 551         c->head = pullup_make_field_queue( c, 8 );
 552
 553         c->frame = calloc( 1, sizeof (struct pullup_frame) );
 554         c->frame->ifields = calloc( 3, sizeof (struct pullup_buffer *) );
 555
 556         if( c->format == PULLUP_FMT_Y )
 557     {
 558         c->diff = pullup_diff_y;
 559         c->comb = pullup_licomb_y;
 560         c->var  = pullup_var_y;
 561         }
 562 }
 563
 564 void pullup_free_context( struct pullup_context * c )
 565 {
 566         struct pullup_field * f;
 567
 568     free( c->buffers );
 569
 570         f = c->head;
 571         do
 572     {
 573                 free( f->diffs );
 574                 free( f->comb );
 575                 f = f->next;
 576                 free( f->prev );
 577         }
 578     while( f != c->head );
 579
 580     free( c->frame );
 581         free( c );
 582 }
 583
 584 /*
 585  *
 586  * PULLUP BUFFER FUNCTIONS
 587  *
 588  */
 589
 590 static void pullup_alloc_buffer( struct pullup_context * c,
 591                                  struct pullup_buffer * b )
 592 {
 593         int i;
 594         if( b->planes ) return;
 595         b->planes = calloc( c->nplanes, sizeof(unsigned char *) );
 596         for ( i = 0; i < c->nplanes; i++ )
 597     {
 598                 b->planes[i] = malloc(c->h[i]*c->stride[i]);
 599                 /* Deal with idiotic 128=0 for chroma: */
 600                 memset( b->planes[i], c->background[i], c->h[i]*c->stride[i] );
 601         }
 602 }
 603
 604 struct pullup_buffer * pullup_lock_buffer( struct pullup_buffer * b,
 605                                            int parity )
 606 {
 607         if( !b ) return 0;
 608         if( (parity+1) & 1 ) b->lock[0]++;
 609         if( (parity+1) & 2 ) b->lock[1]++;
 610
 611         return b;
 612 }
 613
 614 void pullup_release_buffer( struct pullup_buffer * b,
 615                             int parity )
 616 {
 617         if( !b ) return;
 618         if( (parity+1) & 1 ) b->lock[0]--;
 619         if( (parity+1) & 2 ) b->lock[1]--;
 620 }
 621
 622 struct pullup_buffer * pullup_get_buffer( struct pullup_context * c,
 623                                           int parity )
 624 {
 625         int i;
 626
 627         /* Try first to get the sister buffer for the previous field */
 628         if( parity < 2 &&
 629         c->last &&
 630         parity != c->last->parity &&
 631             !c->last->buffer->lock[parity])
 632     {
 633                 pullup_alloc_buffer( c, c->last->buffer );
 634                 return pullup_lock_buffer( c->last->buffer, parity );
 635         }
 636
 637         /* Prefer a buffer with both fields open */
 638         for( i = 0; i < c->nbuffers; i++ )
 639     {
 640                 if( c->buffers[i].lock[0] ) continue;
 641                 if( c->buffers[i].lock[1] ) continue;
 642                 pullup_alloc_buffer( c, &c->buffers[i] );
 643                 return pullup_lock_buffer( &c->buffers[i], parity );
 644         }
 645
 646         if( parity == 2 ) return 0;
 647
 648         /* Search for any half-free buffer */
 649         for( i = 0; i < c->nbuffers; i++ )
 650     {
 651                 if( ((parity+1) & 1) && c->buffers[i].lock[0] ) continue;
 652                 if( ((parity+1) & 2) && c->buffers[i].lock[1] ) continue;
 653                 pullup_alloc_buffer( c, &c->buffers[i] );
 654                 return pullup_lock_buffer( &c->buffers[i], parity );
 655         }
 656
 657         return 0;
 658 }
 659
 660 /*
 661  *
 662  * PULLUP FRAME FUNCTIONS
 663  *
 664  */
 665
 666 struct pullup_frame * pullup_get_frame( struct pullup_context * c )
 667 {
 668         int i;
 669         struct pullup_frame * fr = c->frame;
 670         int n = pullup_decide_frame_length( c );
 671         int aff = c->first->next->affinity;
 672
 673         if ( !n ) return 0;
 674         if ( fr->lock ) return 0;
 675
 676         if ( c->verbose )
 677     {
 678                 pullup_print_aff_and_breaks(c, c->first);
 679                 printf("duration: %d    \n", n);
 680         }
 681
 682         fr->lock++;
 683         fr->length = n;
 684         fr->parity = c->first->parity;
 685         fr->buffer = 0;
 686         for( i = 0; i < n; i++ )
 687     {
 688                 /* We cheat and steal the buffer without release+relock */
 689                 fr->ifields[i] = c->first->buffer;
 690                 c->first->buffer = 0;
 691                 c->first = c->first->next;
 692         }
 693
 694         if( n == 1 )
 695     {
 696                 fr->ofields[fr->parity] = fr->ifields[0];
 697                 fr->ofields[fr->parity^1] = 0;
 698         }
 699     else if( n == 2 )
 700     {
 701                 fr->ofields[fr->parity] = fr->ifields[0];
 702                 fr->ofields[fr->parity^1] = fr->ifields[1];
 703         }
 704     else if( n == 3 )
 705     {
 706                 if( aff == 0 )
 707         {
 708                         aff = (fr->ifields[0] == fr->ifields[1]) ? -1 : 1;
 709         }
 710                 fr->ofields[fr->parity]   = fr->ifields[1+aff];
 711                 fr->ofields[fr->parity^1] = fr->ifields[1];
 712         }
 713         pullup_lock_buffer( fr->ofields[0], 0 );
 714         pullup_lock_buffer( fr->ofields[1], 1 );
 715
 716         if( fr->ofields[0] == fr->ofields[1] )
 717     {
 718                 fr->buffer = fr->ofields[0];
 719                 pullup_lock_buffer(fr->buffer, 2);
 720                 return fr;
 721         }
 722         return fr;
 723 }
 724
 725 void pullup_pack_frame( struct pullup_context * c, struct pullup_frame * fr)
 726 {
 727         int i;
 728         if (fr->buffer) return;
 729         if (fr->length < 2) return; /* FIXME: deal with this */
 730         for( i = 0; i < 2; i++ )
 731         {
 732                 if( fr->ofields[i]->lock[i^1] ) continue;
 733                 fr->buffer = fr->ofields[i];
 734                 pullup_lock_buffer(fr->buffer, 2);
 735                 pullup_copy_field( c, fr->buffer, fr->ofields[i^1], i^1 );
 736                 return;
 737         }
 738         fr->buffer = pullup_get_buffer( c, 2 );
 739         pullup_copy_field( c, fr->buffer, fr->ofields[0], 0 );
 740         pullup_copy_field( c, fr->buffer, fr->ofields[1], 1 );
 741 }
 742
 743 void pullup_release_frame( struct pullup_frame * fr )
 744 {
 745         int i;
 746         for( i = 0; i < fr->length; i++ )
 747     {
 748                 pullup_release_buffer( fr->ifields[i], fr->parity ^ (i&1) );
 749     }
 750         pullup_release_buffer( fr->ofields[0], 0 );
 751         pullup_release_buffer( fr->ofields[1], 1 );
 752         if (fr->buffer) pullup_release_buffer( fr->buffer, 2 );
 753         fr->lock--;
 754 }
 755
 756 /*
 757  *
 758  * PULLUP FIELD FUNCTIONS
 759  *
 760  */
 761
 762 void pullup_submit_field( struct pullup_context * c,
 763                           struct pullup_buffer * b,
 764                           int parity )
 765 {
 766         struct pullup_field * f;
 767
 768         /* Grow the circular list if needed */
 769         pullup_check_field_queue( c );
 770
 771         /* Cannot have two fields of same parity in a row; drop the new one */
 772         if( c->last && c->last->parity == parity ) return;
 773
 774         f = c->head;
 775         f->parity = parity;
 776         f->buffer = pullup_lock_buffer( b, parity );
 777         f->flags = 0;
 778         f->breaks = 0;
 779         f->affinity = 0;
 780
 781         pullup_compute_metric( c, f, parity, f->prev->prev,
 782                            parity, c->diff, f->diffs );
 783         pullup_compute_metric( c, parity?f->prev:f, 0,
 784                            parity?f:f->prev, 1, c->comb, f->comb );
 785         pullup_compute_metric( c, f, parity, f,
 786                            -1, c->var, f->var );
 787
 788         /* Advance the circular list */
 789         if( !c->first ) c->first = c->head;
 790         c->last = c->head;
 791         c->head = c->head->next;
 792 }
 793
 794 void pullup_flush_fields( struct pullup_context * c )
 795 {
 796         struct pullup_field * f;
 797
 798         for( f = c->first; f && f != c->head; f = f->next )
 799     {
 800                 pullup_release_buffer( f->buffer, f->parity );
 801                 f->buffer = 0;
 802         }
 803         c->first = c->last = 0;
 804 }
 805
 806 /*
 807  *
 808  * DETELECINE FILTER FUNCTIONS
 809  *
 810  */
 811
 812 hb_filter_private_t * hb_detelecine_init( int pix_fmt,
 813                                           int width,
 814                                           int height,
 815                                           char * settings )
 816 {
 817     if( pix_fmt != PIX_FMT_YUV420P )
 818     {
 819         return 0;
 820     }
 821
 822     hb_filter_private_t * pv = malloc( sizeof(struct hb_filter_private_s) );
 823
 824     pv->pix_fmt  = pix_fmt;
 825     pv->width[0]  = width;
 826     pv->height[0] = height;
 827     pv->width[1]  = pv->width[2] = width >> 1;
 828     pv->height[1] = pv->height[2] = height >> 1;
 829
 830     int buf_size = 3 * width * height / 2;
 831     pv->buf_out = hb_buffer_init( buf_size );
 832
 833     struct pullup_context * ctx;
 834     pv->pullup_ctx = ctx = pullup_alloc_context();
 835
 836     ctx->junk_left = ctx->junk_right  = 1;
 837     ctx->junk_top  = ctx->junk_bottom = 4;
 838     ctx->strict_breaks = 0;
 839     ctx->metric_plane  = 0;
 840
 841     if( settings )
 842     {
 843                 sscanf( settings, "%d:%d:%d:%d:%d:%d",
 844                 &ctx->junk_left,
 845                 &ctx->junk_right,
 846                 &ctx->junk_top,
 847                 &ctx->junk_bottom,
 848                 &ctx->strict_breaks,
 849                 &ctx->metric_plane );
 850         }
 851
 852     ctx->format = PULLUP_FMT_Y;
 853     ctx->nplanes = 4;
 854
 855     pullup_preinit_context( ctx );
 856
 857     ctx->bpp[0] = ctx->bpp[1] = ctx->bpp[2] = 8;
 858     ctx->background[1] = ctx->background[2] = 128;
 859
 860     ctx->w[0]      = pv->width[0];
 861     ctx->h[0]      = pv->height[0];
 862     ctx->stride[0] = pv->width[0];
 863
 864     ctx->w[1]      = pv->width[1];
 865     ctx->h[1]      = pv->height[1];
 866     ctx->stride[1] = pv->width[1];
 867
 868     ctx->w[2]      = pv->width[2];
 869     ctx->h[2]      = pv->height[2];
 870     ctx->stride[2] = pv->width[2];
 871
 872     ctx->w[3]      = ((width+15)/16) * ((height+15)/16);
 873     ctx->h[3]      = 2;
 874     ctx->stride[3] = ctx->w[3];
 875
 876 #if 0
 877     ctx->verbose = 1;
 878 #endif
 879
 880     pullup_init_context( ctx );
 881
 882     pv->pullup_fakecount = 1;
 883     pv->pullup_skipflag = 0;
 884
 885     return pv;
 886 }
 887
 888 void hb_detelecine_close( hb_filter_private_t * pv )
 889 {
 890     if( !pv )
 891     {
 892         return;
 893     }
 894
 895     if( pv->buf_out )
 896     {
 897         hb_buffer_close( &pv->buf_out );
 898     }
 899
 900     if( pv->pullup_ctx )
 901     {
 902         pullup_free_context( pv->pullup_ctx );
 903     }
 904
 905     free( pv );
 906 }
 907
 908 int hb_detelecine_work( const hb_buffer_t * buf_in,
 909                         hb_buffer_t ** buf_out,
 910                         int pix_fmt,
 911                         int width,
 912                         int height,
 913                         hb_filter_private_t * pv )
 914 {
 915     if( !pv ||
 916         pix_fmt != pv->pix_fmt ||
 917         width != pv->width[0] ||
 918         height != pv->height[0] )
 919     {
 920         return FILTER_FAILED;
 921     }
 922
 923         struct pullup_context * ctx = pv->pullup_ctx;
 924         struct pullup_buffer  * buf;
 925         struct pullup_frame   * frame;
 926
 927     buf = pullup_get_buffer( ctx, 2 );
 928     if( !buf )
 929     {
 930         frame = pullup_get_frame( ctx );
 931         pullup_release_frame( frame );
 932         hb_log( "Could not get buffer from pullup!" );
 933         return FILTER_FAILED;
 934     }
 935
 936     /* Copy input buffer into pullup buffer */
 937     avpicture_fill( &pv->pic_in, buf_in->data,
 938                     pix_fmt, width, height );
 939
 940     hb_buffer_copy_settings( pv->buf_out, buf_in );
 941
 942     memcpy( buf->planes[0], pv->pic_in.data[0],
 943             pv->width[0] * pv->height[0] * sizeof(uint8_t) );
 944     memcpy( buf->planes[1], pv->pic_in.data[1],
 945             pv->width[1] * pv->height[1] * sizeof(uint8_t) );
 946     memcpy( buf->planes[2], pv->pic_in.data[2],
 947             pv->width[2] * pv->height[2] * sizeof(uint8_t) );
 948
 949     /* Submit buffer fields based on buffer flags */
 950     int parity = 1;
 951     if( buf_in->flags & PIC_FLAG_TOP_FIELD_FIRST )
 952     {
 953         parity = 0;
 954     }
 955         pullup_submit_field( ctx, buf, parity );
 956         pullup_submit_field( ctx, buf, parity^1 );
 957     if( buf_in->flags & PIC_FLAG_REPEAT_FIRST_FIELD )
 958     {
 959         pullup_submit_field( ctx, buf, parity );
 960     }
 961         pullup_release_buffer( buf, 2 );
 962
 963     /* Get frame and check if pullup is ready */
 964         frame = pullup_get_frame( ctx );
 965     if( !frame )
 966     {
 967         if( pv->pullup_fakecount )
 968         {
 969             pv->pullup_fakecount--;
 970
 971             memcpy( pv->buf_out->data, buf_in->data, buf_in->size );
 972
 973             goto output_frame;
 974         }
 975         else
 976         {
 977             goto discard_frame;
 978         }
 979     }
 980
 981     /* Check to see if frame should be dropped */
 982     if( frame->length < 2 )
 983     {
 984                 pullup_release_frame( frame );
 985                 frame = pullup_get_frame( ctx );
 986
 987                 if (!frame)
 988         {
 989             goto discard_frame;
 990         }
 991                 if( frame->length < 2 )
 992         {
 993                         pullup_release_frame( frame );
 994
 995                         if( !(buf_in->flags & PIC_FLAG_REPEAT_FIRST_FIELD) )
 996             {
 997                 goto discard_frame;
 998             }
 999
1000             frame = pullup_get_frame( ctx );
1001
1002             if( !frame )
1003             {
1004                 goto discard_frame;
1005             }
1006                         if( frame->length < 2 )
1007             {
1008                                 pullup_release_frame( frame );
1009                 goto discard_frame;
1010                         }
1011                 }
1012     }
1013
1014     /* Check to see if frame buffer is ready for export */
1015     if( !frame->buffer )
1016     {
1017         pullup_pack_frame( ctx, frame );
1018     }
1019
1020     /* Copy pullup frame buffer into output buffer */
1021     avpicture_fill( &pv->pic_out, pv->buf_out->data,
1022                     pix_fmt, width, height );
1023
1024     memcpy( pv->pic_out.data[0], frame->buffer->planes[0],
1025             pv->width[0] * pv->height[0] * sizeof(uint8_t) );
1026     memcpy( pv->pic_out.data[1], frame->buffer->planes[1],
1027             pv->width[1] * pv->height[1] * sizeof(uint8_t) );
1028     memcpy( pv->pic_out.data[2], frame->buffer->planes[2],
1029             pv->width[2] * pv->height[2] * sizeof(uint8_t) );
1030
1031     pullup_release_frame( frame );
1032
1033 output_frame:
1034     *buf_out = pv->buf_out;
1035     return FILTER_OK;
1036
1037 /* This and all discard_frame calls shown above are
1038    the result of me restoring the functionality in
1039    pullup that huevos_rancheros disabled because
1040    HB couldn't handle it.                           */
1041 discard_frame:
1042     *buf_out = pv->buf_out;
1043     return FILTER_DROP;
1044
1045 }
1046
1047