git.sesse.net Git - vlc/blob - src/video_parser/vpar_synchro.c

   1 /*****************************************************************************
   2  * vpar_motion.c : motion vectors parsing
   3  *****************************************************************************
   4  * Copyright (C) 1999, 2000 VideoLAN
   5  *
   6  * Authors:
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  21  *****************************************************************************/
  22
  23 /*****************************************************************************
  24  * Preamble
  25  *****************************************************************************/
  26 #include "defs.h"
  27
  28 #include <stdlib.h>                                                /* free() */
  29 #include <sys/types.h>                        /* on BSD, uio.h needs types.h */
  30 #include <sys/uio.h>                                            /* "input.h" */
  31
  32 #include "config.h"
  33 #include "common.h"
  34 #include "threads.h"
  35 #include "mtime.h"
  36 #include "plugins.h"
  37
  38 #include "intf_msg.h"
  39
  40 #include "input.h"
  41 #include "decoder_fifo.h"
  42 #include "video.h"
  43 #include "video_output.h"
  44
  45 #include "vdec_idct.h"
  46 #include "video_decoder.h"
  47 #include "vdec_motion.h"
  48
  49 #include "vpar_blocks.h"
  50 #include "vpar_headers.h"
  51 #include "vpar_synchro.h"
  52 #include "video_parser.h"
  53
  54 #define MAX_COUNT 3
  55
  56 /*
  57  * Local prototypes
  58  */
  59
  60 #ifdef SAM_SYNCHRO
  61
  62 /*****************************************************************************
  63  * vpar_SynchroUpdateStructures : Update the synchro structures
  64  *****************************************************************************/
  65 void vpar_SynchroUpdateStructures( vpar_thread_t * p_vpar,
  66                                    int i_coding_type, boolean_t b_kept )
  67 {
  68     double          i_can_display;
  69     mtime_t         i_pts;
  70     pes_packet_t *  p_pes = p_vpar->bit_stream.p_decoder_fifo->buffer[
  71                                p_vpar->bit_stream.p_decoder_fifo->i_start ];
  72
  73     /* try to guess the current DTS and PTS */
  74     if( p_pes->b_has_pts )
  75     {
  76         i_pts = p_pes->i_pts;
  77
  78         /* if the image is I type, then the presentation timestamp is
  79          * the PTS of the PES. Otherwise, we calculate it with the
  80          * theorical framerate value */
  81         if( i_coding_type == I_CODING_TYPE )
  82         {
  83             p_vpar->synchro.i_last_pts = p_pes->i_pts;
  84         }
  85         else
  86         {
  87             p_vpar->synchro.i_last_pts += p_vpar->synchro.i_theorical_delay;
  88         }
  89
  90         p_pes->b_has_pts = 0;
  91     }
  92     else
  93     {
  94         p_vpar->synchro.i_last_pts += p_vpar->synchro.i_theorical_delay;
  95         i_pts = p_vpar->synchro.i_last_pts;
  96     }
  97
  98     /* update structures */
  99     switch(i_coding_type)
 100     {
 101         case P_CODING_TYPE:
 102
 103             p_vpar->synchro.i_P_seen++;
 104             if( b_kept ) p_vpar->synchro.i_P_kept++;
 105             break;
 106
 107         case B_CODING_TYPE:
 108             p_vpar->synchro.i_B_seen++;
 109             if( b_kept ) p_vpar->synchro.i_B_kept++;
 110             break;
 111
 112         case I_CODING_TYPE:
 113
 114             /* update the last I PTS we have, we need it to
 115              * calculate the theorical framerate */
 116             if (i_pts != p_vpar->synchro.i_last_seen_I_pts)
 117             {
 118                 if ( p_vpar->synchro.i_last_seen_I_pts )
 119                 {
 120                     p_vpar->synchro.i_theorical_delay =
 121                             ( i_pts - p_vpar->synchro.i_last_seen_I_pts )
 122                           / ( 1 + p_vpar->synchro.i_B_seen
 123                                 + p_vpar->synchro.i_P_seen);
 124                 }
 125                 p_vpar->synchro.i_last_seen_I_pts = i_pts;
 126             }
 127
 128             /* now we calculated all statistics, it's time to
 129              * decide what we have the time to display */
 130             i_can_display = (float)(i_pts - p_vpar->synchro.i_last_kept_I_pts)
 131                                 / p_vpar->synchro.i_delay;
 132
 133             p_vpar->synchro.b_all_I = 0;
 134             p_vpar->synchro.b_all_B = 0;
 135             p_vpar->synchro.b_all_P = 0;
 136             p_vpar->synchro.displayable_p = 0;
 137             p_vpar->synchro.displayable_b = 0;
 138
 139             if( ( p_vpar->synchro.b_all_I = ( i_can_display > 1 ) ) )
 140             {
 141                 i_can_display -= 1;
 142
 143                 if( !( p_vpar->synchro.b_all_P
 144                         = ( i_can_display > p_vpar->synchro.i_P_seen ) ) )
 145                 {
 146                     p_vpar->synchro.displayable_p = i_can_display;
 147                 }
 148                 else
 149                 {
 150                     i_can_display -= p_vpar->synchro.i_P_seen;
 151
 152                     if( !( p_vpar->synchro.b_all_B
 153                             = ( i_can_display > p_vpar->synchro.i_B_seen ) ) )
 154                     {
 155                         p_vpar->synchro.displayable_b = i_can_display;
 156                     }
 157                 }
 158             }
 159
 160 #if 1
 161             if( p_vpar->synchro.b_all_I )
 162                 intf_ErrMsg( " I: 1/1  " );
 163             if( p_vpar->synchro.b_all_P )
 164                 intf_ErrMsg( "P: %i/%i  ", p_vpar->synchro.i_P_seen,
 165                                            p_vpar->synchro.i_P_seen );
 166             else if( p_vpar->synchro.displayable_p > 0 )
 167                 intf_ErrMsg( "P: %.2f/%i  ", p_vpar->synchro.displayable_p,
 168                                              p_vpar->synchro.i_P_seen );
 169             if( p_vpar->synchro.b_all_B )
 170                 intf_ErrMsg( "B: %i/%i", p_vpar->synchro.i_B_seen,
 171                                          p_vpar->synchro.i_B_seen );
 172             else if( p_vpar->synchro.displayable_b > 0 )
 173                 intf_ErrMsg( "B: %.2f/%i", p_vpar->synchro.displayable_b,
 174                                            p_vpar->synchro.i_B_seen );
 175             intf_ErrMsg( "                    \r" );
 176 #endif
 177             p_vpar->synchro.i_P_seen = 0;
 178             p_vpar->synchro.i_B_seen = 0;
 179
 180             /* update some values */
 181             if( b_kept )
 182             {
 183                 p_vpar->synchro.i_last_kept_I_pts = i_pts;
 184                 p_vpar->synchro.i_P_kept = 0;
 185                 p_vpar->synchro.i_B_kept = 0;
 186             }
 187
 188             break;
 189     }
 190 }
 191
 192 /*****************************************************************************
 193  * vpar_SynchroChoose : Decide whether we will decode a picture or not
 194  *****************************************************************************/
 195 boolean_t vpar_SynchroChoose( vpar_thread_t * p_vpar, int i_coding_type,
 196                               int i_structure )
 197 {
 198     mtime_t i_delay = p_vpar->synchro.i_last_pts - mdate();
 199
 200     //return (i_coding_type == I_CODING_TYPE);
 201
 202     switch( i_coding_type )
 203     {
 204         case I_CODING_TYPE:
 205
 206             //intf_ErrMsg( " I  %f      %f\nI ", 1000000.0 / p_vpar->synchro.i_theorical_delay, 1000000.0 / p_vpar->synchro.i_delay );
 207             return( p_vpar->synchro.b_all_I );
 208
 209         case P_CODING_TYPE:
 210
 211             //return(1);
 212             if( p_vpar->synchro.b_all_P )
 213             {
 214                 //intf_ErrMsg( " p  " );
 215                 return( 1 );
 216             }
 217
 218             if( p_vpar->synchro.displayable_p * i_delay
 219                 < p_vpar->synchro.i_delay )
 220             {
 221                 //intf_ErrMsg( " -  " );
 222                 return( 0 );
 223             }
 224
 225             p_vpar->synchro.displayable_p--;
 226             //intf_ErrMsg( " p> " );
 227             return( 1 );
 228
 229         case B_CODING_TYPE:
 230
 231             if( p_vpar->synchro.b_all_B )
 232             {
 233                 //intf_ErrMsg( "b " );
 234                 return( 1 );
 235             }
 236
 237             if( p_vpar->synchro.displayable_b <= 0 )
 238             {
 239                 //intf_ErrMsg( "  " );
 240                 return( 0 );
 241             }
 242
 243             if( i_delay < 0 )
 244             {
 245                 //intf_ErrMsg( "· " );
 246                 p_vpar->synchro.displayable_b -= 0.5;
 247                 return( 0 );
 248             }
 249
 250             //intf_ErrMsg( "b " );
 251             p_vpar->synchro.displayable_b--;
 252             return( 1 );
 253     }
 254
 255     return( 0 );
 256
 257 }
 258
 259 /*****************************************************************************
 260  * vpar_SynchroTrash : Update timers when we trash a picture
 261  *****************************************************************************/
 262 void vpar_SynchroTrash( vpar_thread_t * p_vpar, int i_coding_type,
 263                         int i_structure )
 264 {
 265     vpar_SynchroUpdateStructures (p_vpar, i_coding_type, 0);
 266
 267 }
 268
 269 /*****************************************************************************
 270  * vpar_SynchroDecode : Update timers when we decide to decode a picture
 271  *****************************************************************************/
 272 void vpar_SynchroDecode( vpar_thread_t * p_vpar, int i_coding_type,
 273                             int i_structure )
 274 {
 275     vpar_SynchroUpdateStructures (p_vpar, i_coding_type, 1);
 276
 277     p_vpar->synchro.i_date_fifo[p_vpar->synchro.i_stop] = mdate();
 278
 279     FIFO_INCREMENT( i_stop );
 280
 281 }
 282
 283 /*****************************************************************************
 284  * vpar_SynchroEnd : Called when the image is totally decoded
 285  *****************************************************************************/
 286 void vpar_SynchroEnd( vpar_thread_t * p_vpar )
 287 {
 288     if( p_vpar->synchro.i_stop != p_vpar->synchro.i_start )
 289     {
 290         mtime_t i_delay;
 291
 292         i_delay = ( mdate() -
 293             p_vpar->synchro.i_date_fifo[p_vpar->synchro.i_start] )
 294               / ( (p_vpar->synchro.i_stop - p_vpar->synchro.i_start) & 0x0f );
 295
 296         p_vpar->synchro.i_delay =
 297             ( 7 * p_vpar->synchro.i_delay + i_delay ) >> 3;
 298
 299 #if 0
 300         intf_ErrMsg( "decode %lli (mean %lli, theorical %lli)\n",
 301                      i_delay, p_vpar->synchro.i_delay,
 302                      p_vpar->synchro.i_theorical_delay );
 303 #endif
 304     }
 305     else
 306     {
 307         intf_ErrMsg( "vpar error: critical ! fifo full\n" );
 308     }
 309
 310     FIFO_INCREMENT( i_start );
 311 }
 312
 313 /*****************************************************************************
 314  * vpar_SynchroDate : When an image has been decoded, ask for its date
 315  *****************************************************************************/
 316 mtime_t vpar_SynchroDate( vpar_thread_t * p_vpar )
 317 {
 318 #if 0
 319
 320     mtime_t i_displaydate = p_vpar->synchro.i_last_pts;
 321
 322     static mtime_t i_delta = 0;
 323
 324     intf_ErrMsg( "displaying image with delay %lli and delta %lli\n",
 325         i_displaydate - mdate(),
 326         i_displaydate - i_delta );
 327
 328     intf_ErrMsg ( "theorical fps: %f - actual fps: %f \n",
 329         1000000.0 / p_vpar->synchro.i_theorical_delay, 1000000.0 / p_vpar->synchro.i_delay );
 330
 331     i_delta = i_displaydate;
 332
 333     return i_displaydate;
 334 #else
 335
 336     return p_vpar->synchro.i_last_pts;
 337
 338 #endif
 339 }
 340
 341 #endif
 342
 343 #ifdef MEUUH_SYNCHRO
 344
 345 /* synchro a deux balles backportee du decodeur de reference. NE MARCHE PAS
 346 AVEC LES IMAGES MONOTRAMES */
 347
 348 boolean_t vpar_SynchroChoose( vpar_thread_t * p_vpar, int i_coding_type,
 349                               int i_structure )
 350 {
 351     switch (i_coding_type)
 352     {
 353     case B_CODING_TYPE:
 354         if ((p_vpar->synchro.kludge_level <= p_vpar->synchro.kludge_nbp))
 355         {
 356             p_vpar->synchro.kludge_b++;
 357             return( 0 );
 358         }
 359         if (p_vpar->synchro.kludge_b %
 360              (p_vpar->synchro.kludge_nbb /
 361                 (p_vpar->synchro.kludge_level - p_vpar->synchro.kludge_nbp)))
 362         {
 363             p_vpar->synchro.kludge_b++;
 364             return( 0 );
 365         }
 366         p_vpar->synchro.kludge_b++;
 367         return( 1 );
 368
 369     case P_CODING_TYPE:
 370         if (p_vpar->synchro.kludge_p++ >= p_vpar->synchro.kludge_level)
 371         {
 372             return( 0 );
 373         }
 374         return( 1 );
 375
 376     default:
 377         return( 1 );
 378     }
 379 }
 380
 381 void vpar_SynchroTrash( vpar_thread_t * p_vpar, int i_coding_type,
 382                         int i_structure )
 383 {
 384     if (DECODER_FIFO_START(p_vpar->fifo)->b_has_pts && i_coding_type == I_CODING_TYPE)
 385     {
 386         p_vpar->synchro.kludge_nbframes = 0;
 387         p_vpar->synchro.kludge_date = DECODER_FIFO_START(p_vpar->fifo)->i_pts;
 388     }
 389     else
 390         p_vpar->synchro.kludge_nbframes++;
 391     DECODER_FIFO_START(p_vpar->fifo)->b_has_pts = 0;
 392 }
 393
 394 void vpar_SynchroDecode( vpar_thread_t * p_vpar, int i_coding_type,
 395                             int i_structure )
 396 {
 397     if (DECODER_FIFO_START(p_vpar->fifo)->b_has_pts && i_coding_type == I_CODING_TYPE)
 398     {
 399         p_vpar->synchro.kludge_nbframes = 0;
 400         p_vpar->synchro.kludge_date = DECODER_FIFO_START(p_vpar->fifo)->i_pts;
 401         DECODER_FIFO_START(p_vpar->fifo)->b_has_pts = 0;
 402     }
 403     else
 404         p_vpar->synchro.kludge_nbframes++;
 405 }
 406
 407 mtime_t vpar_SynchroDate( vpar_thread_t * p_vpar )
 408 {
 409     return( p_vpar->synchro.kludge_date
 410             + p_vpar->synchro.kludge_nbframes*1000000/(p_vpar->sequence.r_frame_rate ) );
 411 }
 412
 413 void vpar_SynchroEnd( vpar_thread_t * p_vpar )
 414 {
 415 }
 416
 417 void vpar_SynchroKludge( vpar_thread_t * p_vpar, mtime_t date )
 418 {
 419     mtime_t     show_date;
 420     int         temp = p_vpar->synchro.kludge_level;
 421
 422     p_vpar->synchro.kludge_nbp = p_vpar->synchro.kludge_p ? p_vpar->synchro.kludge_p : 5;
 423     p_vpar->synchro.kludge_nbb = p_vpar->synchro.kludge_b ? p_vpar->synchro.kludge_b : 6;
 424     show_date = date - mdate();
 425     p_vpar->synchro.kludge_p = 0;
 426     p_vpar->synchro.kludge_b = 0;
 427
 428     if (show_date < (SYNC_DELAY - SYNC_TOLERATE) && show_date <= p_vpar->synchro.kludge_prevdate)
 429     {
 430         p_vpar->synchro.kludge_level--;
 431         if (p_vpar->synchro.kludge_level < 0)
 432             p_vpar->synchro.kludge_level = 0;
 433         else if (p_vpar->synchro.kludge_level >
 434                      p_vpar->synchro.kludge_nbp + p_vpar->synchro.kludge_nbb)
 435             p_vpar->synchro.kludge_level = p_vpar->synchro.kludge_nbp + p_vpar->synchro.kludge_nbb;
 436 #ifdef DEBUG
 437         if (temp != p_vpar->synchro.kludge_level)
 438             intf_DbgMsg("vdec debug: Level changed from %d to %d (%Ld)\n",
 439                         temp, p_vpar->synchro.kludge_level, show_date );
 440 #endif
 441     }
 442     else if (show_date > (SYNC_DELAY + SYNC_TOLERATE) && show_date >= p_vpar->synchro.kludge_prevdate)
 443     {
 444         p_vpar->synchro.kludge_level++;
 445         if (p_vpar->synchro.kludge_level > p_vpar->synchro.kludge_nbp + p_vpar->synchro.kludge_nbb)
 446             p_vpar->synchro.kludge_level = p_vpar->synchro.kludge_nbp + p_vpar->synchro.kludge_nbb;
 447 #ifdef DEBUG
 448         if (temp != p_vpar->synchro.kludge_level)
 449             intf_DbgMsg("vdec debug: Level changed from %d to %d (%Ld)\n",
 450                         temp, p_vpar->synchro.kludge_level, show_date );
 451 #endif
 452     }
 453
 454     p_vpar->synchro.kludge_prevdate = show_date;
 455     if ((p_vpar->synchro.kludge_level - p_vpar->synchro.kludge_nbp) > p_vpar->synchro.kludge_nbb)
 456         p_vpar->synchro.kludge_level = p_vpar->synchro.kludge_nbb + p_vpar->synchro.kludge_nbp;
 457 }
 458
 459 #endif
 460
 461
 462 #ifdef POLUX_SYNCHRO
 463
 464 void vpar_SynchroSetCurrentDate( vpar_thread_t * p_vpar, int i_coding_type )
 465 {
 466     pes_packet_t * p_pes =
 467         p_vpar->bit_stream.p_decoder_fifo->buffer[p_vpar->bit_stream.p_decoder_fifo->i_start];
 468
 469
 470     switch( i_coding_type )
 471     {
 472     case B_CODING_TYPE:
 473         if( p_pes->b_has_pts )
 474         {
 475             if( p_pes->i_pts < p_vpar->synchro.i_current_frame_date )
 476             {
 477                 intf_ErrMsg( "vpar warning: pts_date < current_date\n" );
 478             }
 479             p_vpar->synchro.i_current_frame_date = p_pes->i_pts;
 480             p_pes->b_has_pts = 0;
 481         }
 482         else
 483         {
 484             p_vpar->synchro.i_current_frame_date += 1000000/(p_vpar->sequence.r_frame_rate);
 485         }
 486         break;
 487
 488     default:
 489
 490         if( p_vpar->synchro.i_backward_frame_date == 0 )
 491         {
 492             p_vpar->synchro.i_current_frame_date += 1000000/(p_vpar->sequence.r_frame_rate);
 493         }
 494         else
 495         {
 496             if( p_vpar->synchro.i_backward_frame_date < p_vpar->synchro.i_current_frame_date )
 497             {
 498                 intf_ErrMsg( "vpar warning: backward_date < current_date (%Ld)\n",
 499                          p_vpar->synchro.i_backward_frame_date - p_vpar->synchro.i_current_frame_date );
 500             }
 501             p_vpar->synchro.i_current_frame_date = p_vpar->synchro.i_backward_frame_date;
 502             p_vpar->synchro.i_backward_frame_date = 0;
 503         }
 504
 505         if( p_pes->b_has_pts )
 506         {
 507             p_vpar->synchro.i_backward_frame_date = p_pes->i_pts;
 508             p_pes->b_has_pts = 0;
 509         }
 510        break;
 511     }
 512 }
 513
 514 boolean_t vpar_SynchroChoose( vpar_thread_t * p_vpar, int i_coding_type,
 515                               int i_structure )
 516 {
 517     boolean_t b_result = 1;
 518     int i_synchro_level = p_vpar->p_vout->i_synchro_level;
 519
 520     vpar_SynchroSetCurrentDate( p_vpar, i_coding_type );
 521
 522     /*
 523      * The synchro level is updated by the video input (see SynchroLevelUpdate)
 524      * so we just use the synchro_level to decide which frame to trash
 525      */
 526
 527     switch( i_coding_type )
 528     {
 529     case I_CODING_TYPE:
 530
 531         p_vpar->synchro.r_p_average =
 532             (p_vpar->synchro.r_p_average*(SYNC_AVERAGE_COUNT-1)+p_vpar->synchro.i_p_count)/SYNC_AVERAGE_COUNT;
 533         p_vpar->synchro.r_b_average =
 534             (p_vpar->synchro.r_b_average*(SYNC_AVERAGE_COUNT-1)+p_vpar->synchro.i_b_count)/SYNC_AVERAGE_COUNT;
 535
 536         p_vpar->synchro.i_p_nb = (int)(p_vpar->synchro.r_p_average+0.5);
 537         p_vpar->synchro.i_b_nb = (int)(p_vpar->synchro.r_b_average+0.5);
 538
 539         p_vpar->synchro.i_p_count = p_vpar->synchro.i_b_count = 0;
 540         p_vpar->synchro.i_b_trasher = p_vpar->synchro.i_b_nb / 2;
 541         p_vpar->synchro.i_i_count++;
 542        break;
 543
 544     case P_CODING_TYPE:
 545         p_vpar->synchro.i_p_count++;
 546         if( p_vpar->synchro.i_p_count > i_synchro_level )
 547         {
 548             b_result = 0;
 549         }
 550         break;
 551
 552     case B_CODING_TYPE:
 553         p_vpar->synchro.i_b_count++;
 554         if( p_vpar->synchro.i_p_nb >= i_synchro_level )
 555         {
 556             /* We must trash all the B */
 557             b_result = 0;
 558         }
 559         else
 560         {
 561             /* We use the brensenham algorithm to decide which B to trash */
 562             p_vpar->synchro.i_b_trasher +=
 563                 p_vpar->synchro.i_b_nb - (i_synchro_level-p_vpar->synchro.i_p_nb);
 564             if( p_vpar->synchro.i_b_trasher >= p_vpar->synchro.i_b_nb )
 565             {
 566                 b_result = 0;
 567                 p_vpar->synchro.i_b_trasher -= p_vpar->synchro.i_b_nb;
 568             }
 569         }
 570         break;
 571     }
 572
 573     return( b_result );
 574 }
 575
 576 void vpar_SynchroTrash( vpar_thread_t * p_vpar, int i_coding_type,
 577                         int i_structure )
 578 {
 579     vpar_SynchroChoose( p_vpar, i_coding_type, i_structure );
 580 }
 581
 582 void vpar_SynchroUpdateLevel()
 583 {
 584     //vlc_mutex_lock( &level_lock );
 585     //vlc_mutex_unlock( &level_lock );
 586 }
 587
 588 mtime_t vpar_SynchroDate( vpar_thread_t * p_vpar )
 589 {
 590     return( p_vpar->synchro.i_current_frame_date );
 591 }
 592
 593 /* functions with no use */
 594
 595 void vpar_SynchroEnd( vpar_thread_t * p_vpar )
 596 {
 597 }
 598
 599 void vpar_SynchroDecode( vpar_thread_t * p_vpar, int i_coding_type,
 600                             int i_structure )
 601 {
 602 }
 603
 604 #endif