modules/demux/nsv.c

   1 /*****************************************************************************
   2  * nsv.c: NullSoft Video demuxer.
   3  *****************************************************************************
   4  * Copyright (C) 2004-2007 VLC authors and VideoLAN
   5  *
   6  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU Lesser General Public License as published by
  10  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 /*****************************************************************************
  24  * Preamble
  25  *****************************************************************************/
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <limits.h>
  32
  33 #include <vlc_common.h>
  34 #include <vlc_plugin.h>
  35 #include <vlc_demux.h>
  36
  37 /* TODO:
  38  *  - implement NSVf parsing (to get meta data)
  39  *  - implement missing Control (and in the right way)
  40  *  - ...
  41  */
  42
  43 /*****************************************************************************
  44  * Module descriptor
  45  *****************************************************************************/
  46 static int  Open    ( vlc_object_t * );
  47 static void Close  ( vlc_object_t * );
  48
  49 vlc_module_begin ()
  50     set_description( N_("NullSoft demuxer" ) )
  51     set_capability( "demux", 10 )
  52     set_category( CAT_INPUT )
  53     set_subcategory( SUBCAT_INPUT_DEMUX )
  54     set_callbacks( Open, Close )
  55     add_shortcut( "nsv" )
  56     add_file_extension("nsv")
  57 vlc_module_end ()
  58
  59 /*****************************************************************************
  60  * Local prototypes
  61  *****************************************************************************/
  62
  63 typedef struct
  64 {
  65     es_format_t  fmt_audio;
  66     es_out_id_t *p_audio;
  67
  68     es_format_t  fmt_video;
  69     es_out_id_t *p_video;
  70
  71     es_format_t  fmt_sub;
  72     es_out_id_t  *p_sub;
  73
  74     vlc_tick_t  i_pcr;
  75     vlc_tick_t  i_time;
  76     vlc_tick_t  i_pcr_inc;
  77
  78     bool b_start_record;
  79 } demux_sys_t;
  80
  81 static int Demux  ( demux_t *p_demux );
  82 static int Control( demux_t *p_demux, int i_query, va_list args );
  83
  84 static int ReSynch( demux_t *p_demux );
  85
  86 static int ReadNSVf( demux_t *p_demux );
  87 static int ReadNSVs( demux_t *p_demux );
  88
  89 /*****************************************************************************
  90  * Open
  91  *****************************************************************************/
  92 static int Open( vlc_object_t *p_this )
  93 {
  94     demux_t     *p_demux = (demux_t*)p_this;
  95     demux_sys_t *p_sys;
  96
  97     const uint8_t *p_peek;
  98
  99     if( vlc_stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
 100         return VLC_EGENERIC;
 101
 102     if( memcmp( p_peek, "NSVf", 4 ) && memcmp( p_peek, "NSVs", 4 ) )
 103     {
 104        /* In case we had force this demuxer we try to resynch */
 105         if( !p_demux->obj.force || ReSynch( p_demux ) )
 106             return VLC_EGENERIC;
 107     }
 108
 109     p_sys = malloc( sizeof( demux_sys_t ) );
 110     if( unlikely(p_sys == NULL) )
 111         return VLC_ENOMEM;
 112
 113     /* Fill p_demux field */
 114     p_demux->p_sys = p_sys;
 115     p_demux->pf_demux = Demux;
 116     p_demux->pf_control = Control;
 117
 118     es_format_Init( &p_sys->fmt_audio, AUDIO_ES, 0 );
 119     p_sys->p_audio = NULL;
 120
 121     es_format_Init( &p_sys->fmt_video, VIDEO_ES, 0 );
 122     p_sys->p_video = NULL;
 123
 124     es_format_Init( &p_sys->fmt_sub, SPU_ES, 0 );
 125     p_sys->p_sub = NULL;
 126
 127     p_sys->i_pcr   = 0;
 128     p_sys->i_time  = 0;
 129     p_sys->i_pcr_inc = 0;
 130
 131     p_sys->b_start_record = false;
 132
 133     return VLC_SUCCESS;
 134 }
 135
 136 /*****************************************************************************
 137  * Close
 138  *****************************************************************************/
 139 static void Close( vlc_object_t *p_this )
 140 {
 141     demux_t     *p_demux = (demux_t*)p_this;
 142     demux_sys_t *p_sys = p_demux->p_sys;
 143
 144     free( p_sys );
 145 }
 146
 147
 148 /*****************************************************************************
 149  * Demux:
 150  *****************************************************************************/
 151 static int Demux( demux_t *p_demux )
 152 {
 153     demux_sys_t *p_sys = p_demux->p_sys;
 154
 155     uint8_t     header[5];
 156     const uint8_t *p_peek;
 157
 158     int         i_size;
 159     block_t     *p_frame;
 160
 161     for( ;; )
 162     {
 163         if( vlc_stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
 164             return VLC_DEMUXER_EOF;
 165
 166         if( !memcmp( p_peek, "NSVf", 4 ) )
 167         {
 168             if( ReadNSVf( p_demux ) )
 169                 return VLC_DEMUXER_EGENERIC;
 170         }
 171         else if( !memcmp( p_peek, "NSVs", 4 ) )
 172         {
 173             if( p_sys->b_start_record )
 174             {
 175                 /* Enable recording once synchronized */
 176                 vlc_stream_Control( p_demux->s, STREAM_SET_RECORD_STATE, true, "nsv" );
 177                 p_sys->b_start_record = false;
 178             }
 179
 180             if( ReadNSVs( p_demux ) )
 181                 return VLC_DEMUXER_EGENERIC;
 182             break;
 183         }
 184         else if( GetWLE( p_peek ) == 0xbeef )
 185         {
 186             /* Next frame of the current NSVs chunk */
 187             if( vlc_stream_Read( p_demux->s, NULL, 2 ) < 2 )
 188             {
 189                 msg_Warn( p_demux, "cannot read" );
 190                 return VLC_DEMUXER_EOF;
 191             }
 192             break;
 193         }
 194         else
 195         {
 196             msg_Err( p_demux, "invalid signature 0x%x (%4.4s)", GetDWLE( p_peek ), (const char*)p_peek );
 197             if( ReSynch( p_demux ) )
 198                 return VLC_DEMUXER_EGENERIC;
 199         }
 200     }
 201
 202     if( vlc_stream_Read( p_demux->s, header, 5 ) < 5 )
 203     {
 204         msg_Warn( p_demux, "cannot read" );
 205         return VLC_DEMUXER_EOF;
 206     }
 207
 208     /* Set PCR */
 209     es_out_SetPCR( p_demux->out, VLC_TICK_0 + p_sys->i_pcr );
 210
 211     /* Read video */
 212     i_size = ( header[0] >> 4 ) | ( header[1] << 4 ) | ( header[2] << 12 );
 213     if( i_size > 0 )
 214     {
 215         /* extra data ? */
 216         if( (header[0]&0x0f) != 0x0 )
 217         {
 218             uint8_t      aux[6];
 219             int          i_aux;
 220             vlc_fourcc_t fcc;
 221             if( vlc_stream_Read( p_demux->s, aux, 6 ) < 6 )
 222             {
 223                 msg_Warn( p_demux, "cannot read" );
 224                 return VLC_DEMUXER_EOF;
 225             }
 226             i_aux = GetWLE( aux );
 227             fcc   = VLC_FOURCC( aux[2], aux[3], aux[4], aux[5] );
 228
 229             msg_Dbg( p_demux, "Belekas: %d - size=%d fcc=%4.4s",
 230                      header[0]&0xf, i_aux, (char*)&fcc );
 231
 232             if( fcc == VLC_FOURCC( 'S', 'U', 'B', 'T' ) && i_aux > 2 )
 233             {
 234                 if( p_sys->p_sub == NULL )
 235                 {
 236                     p_sys->fmt_sub.i_codec = VLC_FOURCC( 's', 'u', 'b', 't' );
 237                     p_sys->p_sub = es_out_Add( p_demux->out, &p_sys->fmt_sub );
 238                     if( p_sys->p_sub )
 239                         es_out_Control( p_demux->out, ES_OUT_SET_ES, p_sys->p_sub );
 240                 }
 241                 if( vlc_stream_Read( p_demux->s, NULL, 2 ) < 2 )
 242                     return VLC_DEMUXER_EOF;
 243
 244                 if( ( p_frame = vlc_stream_Block( p_demux->s, i_aux - 2 ) ) )
 245                 {
 246                     uint8_t *p = p_frame->p_buffer;
 247
 248                     while( p < &p_frame->p_buffer[p_frame->i_buffer] && *p != 0 )
 249                     {
 250                         p++;
 251                     }
 252                     if( *p == 0 && p + 1 < &p_frame->p_buffer[p_frame->i_buffer] )
 253                     {
 254                         p_frame->i_buffer -= p + 1 - p_frame->p_buffer;
 255                         p_frame->p_buffer = p + 1;
 256                     }
 257
 258                     /* Skip the first part (it is the language name) */
 259                     p_frame->i_pts = VLC_TICK_0 + p_sys->i_pcr;
 260                     p_frame->i_dts = VLC_TICK_0 + p_sys->i_pcr + VLC_TICK_FROM_SEC(4);
 261
 262                     if( p_sys->p_sub )
 263                         es_out_Send( p_demux->out, p_sys->p_sub, p_frame );
 264                     else
 265                         block_Release( p_frame );
 266                 }
 267             }
 268             else
 269             {
 270                 /* We skip this extra data */
 271                 if( vlc_stream_Read( p_demux->s, NULL, i_aux ) < i_aux )
 272                 {
 273                     msg_Warn( p_demux, "cannot read" );
 274                     return VLC_DEMUXER_EOF;
 275                 }
 276             }
 277             i_size -= 6 + i_aux;
 278         }
 279
 280         /* msg_Dbg( p_demux, "frame video size=%d", i_size ); */
 281         if( i_size > 0 && ( p_frame = vlc_stream_Block( p_demux->s, i_size ) ) )
 282         {
 283             p_frame->i_dts = VLC_TICK_0 + p_sys->i_pcr;
 284
 285             if( p_sys->p_video )
 286                 es_out_Send( p_demux->out, p_sys->p_video, p_frame );
 287             else
 288             {
 289                 block_Release( p_frame );
 290                 msg_Dbg( p_demux, "ignoring unsupported video frame (size=%d)",
 291                          i_size );
 292             }
 293         }
 294     }
 295
 296     /* Read audio */
 297     i_size = header[3] | ( header[4] << 8 );
 298     if( i_size > 0 )
 299     {
 300         /* msg_Dbg( p_demux, "frame audio size=%d", i_size ); */
 301         if( p_sys->fmt_audio.i_codec == VLC_FOURCC( 'a', 'r', 'a', 'w' ) )
 302         {
 303             uint8_t h[4];
 304             if( vlc_stream_Read( p_demux->s, h, 4 ) < 4 )
 305                 return VLC_DEMUXER_EOF;
 306
 307             p_sys->fmt_audio.audio.i_channels = h[1];
 308             p_sys->fmt_audio.audio.i_rate = GetWLE( &h[2] );
 309
 310             i_size -= 4;
 311         }
 312         if( p_sys->p_audio == NULL )
 313         {
 314             p_sys->p_audio = es_out_Add( p_demux->out, &p_sys->fmt_audio );
 315         }
 316
 317         if( ( p_frame = vlc_stream_Block( p_demux->s, i_size ) ) )
 318         {
 319             p_frame->i_dts =
 320             p_frame->i_pts = VLC_TICK_0 + p_sys->i_pcr;
 321
 322             if( p_sys->p_audio )
 323                 es_out_Send( p_demux->out, p_sys->p_audio, p_frame );
 324             else
 325             {
 326                 block_Release( p_frame );
 327                 msg_Dbg( p_demux, "ignoring unsupported audio frame (size=%d)",
 328                          i_size );
 329             }
 330         }
 331     }
 332
 333     p_sys->i_pcr += p_sys->i_pcr_inc;
 334     if( p_sys->i_time >= 0 )
 335     {
 336         p_sys->i_time += p_sys->i_pcr_inc;
 337     }
 338
 339     return VLC_DEMUXER_SUCCESS;
 340 }
 341
 342 /*****************************************************************************
 343  * Control:
 344  *****************************************************************************/
 345 static int Control( demux_t *p_demux, int i_query, va_list args )
 346 {
 347     demux_sys_t *p_sys = p_demux->p_sys;
 348     double f, *pf;
 349     bool b_bool, *pb_bool;
 350     int64_t i64;
 351
 352     switch( i_query )
 353     {
 354         case DEMUX_CAN_SEEK:
 355             return vlc_stream_vaControl( p_demux->s, i_query, args );
 356
 357         case DEMUX_GET_POSITION:
 358             pf = va_arg( args, double * );
 359             i64 = stream_Size( p_demux->s );
 360             if( i64 > 0 )
 361             {
 362                 double current = vlc_stream_Tell( p_demux->s );
 363                 *pf = current / (double)i64;
 364             }
 365             else
 366             {
 367                 *pf = 0.0;
 368             }
 369             return VLC_SUCCESS;
 370
 371         case DEMUX_SET_POSITION:
 372             f = va_arg( args, double );
 373             i64 = stream_Size( p_demux->s );
 374
 375             if( vlc_stream_Seek( p_demux->s, (int64_t)(i64 * f) ) || ReSynch( p_demux ) )
 376                 return VLC_EGENERIC;
 377
 378             p_sys->i_time = -1; /* Invalidate time display */
 379             return VLC_SUCCESS;
 380
 381         case DEMUX_GET_TIME:
 382             if( p_sys->i_time < 0 )
 383             {
 384                 *va_arg( args, vlc_tick_t * ) = 0;
 385                 return VLC_EGENERIC;
 386             }
 387             *va_arg( args, vlc_tick_t * ) = p_sys->i_time;
 388             return VLC_SUCCESS;
 389
 390 #if 0
 391         case DEMUX_GET_LENGTH:
 392             if( p_sys->i_mux_rate > 0 )
 393             {
 394                 *va_arg( args, vlc_tick_t * ) = vlc_tick_from_samples( stream_Size( p_demux->s ) / 50, p_sys->i_mux_rate);
 395                 return VLC_SUCCESS;
 396             }
 397             *va_arg( args, vlc_tick_t * ) = 0;
 398             return VLC_EGENERIC;
 399
 400 #endif
 401         case DEMUX_GET_FPS:
 402             pf = va_arg( args, double * );
 403             *pf = (double)CLOCK_FREQ / (double)p_sys->i_pcr_inc;
 404             return VLC_SUCCESS;
 405
 406         case DEMUX_CAN_RECORD:
 407             pb_bool = va_arg( args, bool * );
 408             *pb_bool = true;
 409             return VLC_SUCCESS;
 410
 411         case DEMUX_SET_RECORD_STATE:
 412             b_bool = (bool)va_arg( args, int );
 413
 414             if( !b_bool )
 415                 vlc_stream_Control( p_demux->s, STREAM_SET_RECORD_STATE, false );
 416             p_sys->b_start_record = b_bool;
 417             return VLC_SUCCESS;
 418
 419
 420         case DEMUX_SET_TIME:
 421             return VLC_EGENERIC;
 422
 423         case DEMUX_CAN_PAUSE:
 424         case DEMUX_SET_PAUSE_STATE:
 425         case DEMUX_CAN_CONTROL_PACE:
 426         case DEMUX_GET_PTS_DELAY:
 427             return demux_vaControlHelper( p_demux->s, 0, -1, 0, 1, i_query, args );
 428
 429         default:
 430             return VLC_EGENERIC;
 431     }
 432 }
 433
 434 /*****************************************************************************
 435  * ReSynch:
 436  *****************************************************************************/
 437 static int ReSynch( demux_t *p_demux )
 438 {
 439     for( ;; )
 440     {
 441         const uint8_t *p_peek;
 442         int i_peek = vlc_stream_Peek( p_demux->s, &p_peek, 1024 );
 443         if( i_peek < 8 )
 444             break;
 445
 446         int i_skip = 0;
 447
 448         while( i_skip < i_peek - 4 )
 449         {
 450             if( !memcmp( p_peek, "NSVf", 4 )
 451              || !memcmp( p_peek, "NSVs", 4 ) )
 452             {
 453                 if( i_skip > 0
 454                  && vlc_stream_Read( p_demux->s, NULL, i_skip ) < i_skip )
 455                     return VLC_EGENERIC;
 456                 return VLC_SUCCESS;
 457             }
 458             p_peek++;
 459             i_skip++;
 460         }
 461
 462         if( vlc_stream_Read( p_demux->s, NULL, i_skip ) < i_skip )
 463             break;
 464     }
 465     return VLC_EGENERIC;
 466 }
 467
 468 /*****************************************************************************
 469  * ReadNSVf:
 470  *****************************************************************************/
 471 static int ReadNSVf( demux_t *p_demux )
 472 {
 473     /* demux_sys_t *p_sys = p_demux->p_sys; */
 474     const uint8_t     *p;
 475
 476     msg_Dbg( p_demux, "new NSVf chunk" );
 477     if( vlc_stream_Peek( p_demux->s, &p, 8 ) < 8 )
 478     {
 479         return VLC_EGENERIC;
 480     }
 481
 482     uint32_t i_header_size = GetDWLE( &p[4] );
 483     msg_Dbg( p_demux, "    - size=%" PRIu32, i_header_size );
 484
 485     if( i_header_size == 0 || i_header_size == UINT32_MAX )
 486         return VLC_EGENERIC;
 487 #if (UINT32_MAX > SSIZE_MAX)
 488     if( i_header_size > SSIZE_MAX )
 489         return VLC_EGENERIC;
 490 #endif
 491     if ( vlc_stream_Read( p_demux->s, NULL, i_header_size )
 492                                  < (ssize_t)i_header_size )
 493          return VLC_EGENERIC;
 494     return VLC_SUCCESS;
 495 }
 496 /*****************************************************************************
 497  * ReadNSVs:
 498  *****************************************************************************/
 499 static int ReadNSVs( demux_t *p_demux )
 500 {
 501     demux_sys_t *p_sys = p_demux->p_sys;
 502     uint8_t      header[19];
 503     vlc_fourcc_t fcc;
 504
 505     if( vlc_stream_Read( p_demux->s, header, 19 ) < 19 )
 506     {
 507         msg_Warn( p_demux, "cannot read" );
 508         return VLC_EGENERIC;
 509     }
 510
 511     /* Video */
 512     switch( ( fcc = VLC_FOURCC( header[4], header[5], header[6], header[7] ) ) )
 513     {
 514         case VLC_FOURCC( 'V', 'P', '3', ' ' ):
 515         case VLC_FOURCC( 'V', 'P', '3', '0' ):
 516             fcc = VLC_FOURCC( 'V', 'P', '3', '0' );
 517             break;
 518
 519         case VLC_FOURCC( 'V', 'P', '3', '1' ):
 520             fcc = VLC_FOURCC( 'V', 'P', '3', '1' );
 521             break;
 522
 523         case VLC_FOURCC( 'V', 'P', '5', ' ' ):
 524         case VLC_FOURCC( 'V', 'P', '5', '0' ):
 525             fcc = VLC_FOURCC( 'V', 'P', '5', '0' );
 526             break;
 527         case VLC_FOURCC( 'V', 'P', '6', '0' ):
 528         case VLC_FOURCC( 'V', 'P', '6', '1' ):
 529         case VLC_FOURCC( 'V', 'P', '6', '2' ):
 530         case VLC_FOURCC( 'V', 'P', '8', '0' ):
 531         case VLC_FOURCC( 'H', '2', '6', '4' ):
 532         case VLC_FOURCC( 'N', 'O', 'N', 'E' ):
 533             break;
 534         default:
 535             msg_Err( p_demux, "unsupported video codec %4.4s", (char *)&fcc );
 536             break;
 537     }
 538     if( fcc != VLC_FOURCC( 'N', 'O', 'N', 'E' ) && fcc != p_sys->fmt_video.i_codec  )
 539     {
 540         es_format_Init( &p_sys->fmt_video, VIDEO_ES, fcc );
 541         p_sys->fmt_video.video.i_width = GetWLE( &header[12] );
 542         p_sys->fmt_video.video.i_height = GetWLE( &header[14] );
 543         p_sys->fmt_video.video.i_visible_width = p_sys->fmt_video.video.i_width;
 544         p_sys->fmt_video.video.i_visible_height = p_sys->fmt_video.video.i_height;
 545         if( p_sys->p_video )
 546         {
 547             es_out_Del( p_demux->out, p_sys->p_video );
 548         }
 549         p_sys->p_video = es_out_Add( p_demux->out, &p_sys->fmt_video );
 550
 551         msg_Dbg( p_demux, "    - video `%4.4s' %dx%d",
 552                  (char*)&fcc,
 553                  p_sys->fmt_video.video.i_width,
 554                  p_sys->fmt_video.video.i_height );
 555     }
 556
 557     /* Audio */
 558     switch( ( fcc = VLC_FOURCC( header[8], header[9], header[10], header[11] ) ) )
 559     {
 560         case VLC_FOURCC( 'M', 'P', '3', ' ' ):
 561             fcc = VLC_FOURCC( 'm', 'p', 'g', 'a' );
 562             break;
 563         case VLC_FOURCC( 'P', 'C', 'M', ' ' ):
 564             fcc = VLC_FOURCC( 'a', 'r', 'a', 'w' );
 565             break;
 566         case VLC_FOURCC( 'A', 'A', 'C', ' ' ):
 567         case VLC_FOURCC( 'A', 'A', 'C', 'P' ):
 568             fcc = VLC_FOURCC( 'm', 'p', '4', 'a' );
 569             break;
 570         case VLC_FOURCC( 'S', 'P', 'X', ' ' ):
 571             fcc = VLC_FOURCC( 's', 'p', 'x', ' ' );
 572             break;
 573         case VLC_FOURCC( 'N', 'O', 'N', 'E' ):
 574             break;
 575         default:
 576             msg_Err( p_demux, "unsupported audio codec %4.4s", (char *)&fcc );
 577             break;
 578     }
 579
 580     if( fcc != VLC_FOURCC( 'N', 'O', 'N', 'E' ) && fcc != p_sys->fmt_audio.i_codec )
 581     {
 582         msg_Dbg( p_demux, "    - audio `%4.4s'", (char*)&fcc );
 583
 584         if( p_sys->p_audio )
 585         {
 586             es_out_Del( p_demux->out, p_sys->p_audio );
 587             p_sys->p_audio = NULL;
 588         }
 589         es_format_Init( &p_sys->fmt_audio, AUDIO_ES, fcc );
 590     }
 591
 592     if( header[16]&0x80 )
 593     {
 594         /* Fractional frame rate */
 595         switch( header[16]&0x03 )
 596         {
 597             case 0: /* 30 fps */
 598                 p_sys->i_pcr_inc = 33333; /* 300000/9 */
 599                 break;
 600             case 1: /* 29.97 fps */
 601                 p_sys->i_pcr_inc = 33367; /* 300300/9 */
 602                 break;
 603             case 2: /* 25 fps */
 604                 p_sys->i_pcr_inc = 40000; /* 360000/9 */
 605                 break;
 606             case 3: /* 23.98 fps */
 607                 p_sys->i_pcr_inc = 41700; /* 375300/9 */
 608                 break;
 609         }
 610
 611         if( header[16] < 0xc0 )
 612             p_sys->i_pcr_inc = p_sys->i_pcr_inc * (((header[16] ^ 0x80) >> 2 ) +1 );
 613         else
 614             p_sys->i_pcr_inc = p_sys->i_pcr_inc / (((header[16] ^ 0xc0) >> 2 ) +1 );
 615     }
 616     else if( header[16] != 0 )
 617     {
 618         /* Integer frame rate */
 619         p_sys->i_pcr_inc = vlc_tick_from_samples(1, header[16]);
 620     }
 621     else
 622     {
 623         msg_Dbg( p_demux, "invalid fps (0x00)" );
 624         p_sys->i_pcr_inc = VLC_TICK_FROM_MS(40);
 625     }
 626     //msg_Dbg( p_demux, "    - fps=%.3f", 1000000.0 / (double)p_sys->i_pcr_inc );
 627
 628     if( p_sys->p_audio == NULL && p_sys->p_video == NULL )
 629     {
 630         msg_Err( p_demux, "unable to play neither audio nor video, aborting." );
 631         return VLC_EGENERIC;
 632     }
 633
 634     return VLC_SUCCESS;
 635 }
 636