modules/demux/nsv.c

   1 /*****************************************************************************
   2  * nsv.c: NullSoft Video demuxer.
   3  *****************************************************************************
   4  * Copyright (C) 2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>                                      /* malloc(), free() */
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc_demux.h>
  31
  32 /* TODO:
  33  *  - implement NSVf parsing (to get meta data)
  34  *  - implement missing Control (and in the right way)
  35  *  - ...
  36  */
  37
  38 /*****************************************************************************
  39  * Module descriptor
  40  *****************************************************************************/
  41 static int  Open    ( vlc_object_t * );
  42 static void Close  ( vlc_object_t * );
  43
  44 vlc_module_begin();
  45     set_description( _("NullSoft demuxer" ) );
  46     set_capability( "demux2", 10 );
  47     set_category( CAT_INPUT );
  48     set_subcategory( SUBCAT_INPUT_DEMUX );
  49     set_callbacks( Open, Close );
  50     add_shortcut( "nsv" );
  51 vlc_module_end();
  52
  53 /*****************************************************************************
  54  * Local prototypes
  55  *****************************************************************************/
  56
  57 struct demux_sys_t
  58 {
  59     es_format_t  fmt_audio;
  60     es_out_id_t *p_audio;
  61
  62     es_format_t  fmt_video;
  63     es_out_id_t *p_video;
  64
  65     es_format_t  fmt_sub;
  66     es_out_id_t  *p_sub;
  67
  68     int64_t     i_pcr;
  69     int64_t     i_time;
  70     int64_t     i_pcr_inc;
  71 };
  72
  73 static int Demux  ( demux_t *p_demux );
  74 static int Control( demux_t *p_demux, int i_query, va_list args );
  75
  76 static int ReSynch( demux_t *p_demux );
  77
  78 static int ReadNSVf( demux_t *p_demux );
  79 static int ReadNSVs( demux_t *p_demux );
  80
  81 /*****************************************************************************
  82  * Open
  83  *****************************************************************************/
  84 static int Open( vlc_object_t *p_this )
  85 {
  86     demux_t     *p_demux = (demux_t*)p_this;
  87     demux_sys_t *p_sys;
  88
  89     uint8_t     *p_peek;
  90
  91     if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
  92         return VLC_EGENERIC;
  93
  94     if( strncmp( (char *)p_peek, "NSVf", 4 )
  95             && strncmp( (char *)p_peek, "NSVs", 4 ))
  96     {
  97        /* In case we had force this demuxer we try to resynch */
  98         if( strcmp( p_demux->psz_demux, "nsv" ) || ReSynch( p_demux ) )
  99         {
 100             return VLC_EGENERIC;
 101         }
 102     }
 103
 104     /* Fill p_demux field */
 105     p_demux->pf_demux = Demux;
 106     p_demux->pf_control = Control;
 107     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 108
 109     es_format_Init( &p_sys->fmt_audio, AUDIO_ES, 0 );
 110     p_sys->p_audio = NULL;
 111
 112     es_format_Init( &p_sys->fmt_video, VIDEO_ES, 0 );
 113     p_sys->p_video = NULL;
 114
 115     es_format_Init( &p_sys->fmt_sub, SPU_ES, 0 );
 116     p_sys->p_sub = NULL;
 117
 118     p_sys->i_pcr   = 1;
 119     p_sys->i_time  = 0;
 120     p_sys->i_pcr_inc = 0;
 121
 122     return VLC_SUCCESS;
 123 }
 124
 125 /*****************************************************************************
 126  * Close
 127  *****************************************************************************/
 128 static void Close( vlc_object_t *p_this )
 129 {
 130     demux_t     *p_demux = (demux_t*)p_this;
 131     demux_sys_t *p_sys = p_demux->p_sys;
 132
 133     free( p_sys );
 134 }
 135
 136
 137 /*****************************************************************************
 138  * Demux:
 139  *****************************************************************************/
 140 static int Demux( demux_t *p_demux )
 141 {
 142     demux_sys_t *p_sys = p_demux->p_sys;
 143
 144     uint8_t     header[5];
 145     uint8_t     *p_peek;
 146
 147     int         i_size;
 148     block_t     *p_frame;
 149
 150     for( ;; )
 151     {
 152         if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
 153         {
 154             msg_Warn( p_demux, "cannot peek" );
 155             return 0;
 156         }
 157
 158         if( !strncmp( (char *)p_peek, "NSVf", 4 ) )
 159         {
 160             if( ReadNSVf( p_demux ) )
 161             {
 162                 return -1;
 163             }
 164         }
 165         else if( !strncmp( (char *)p_peek, "NSVs", 4 ) )
 166         {
 167             if( ReadNSVs( p_demux ) )
 168             {
 169                 return -1;
 170             }
 171             break;
 172         }
 173         else if( GetWLE( p_peek ) == 0xbeef )
 174         {
 175             /* Next frame of the current NSVs chunk */
 176             if( stream_Read( p_demux->s, NULL, 2 ) < 2 )
 177             {
 178                 msg_Warn( p_demux, "cannot read" );
 179                 return 0;
 180             }
 181             break;
 182         }
 183         else
 184         {
 185             msg_Err( p_demux, "invalid signature 0x%x (%4.4s)", *(uint32_t*)p_peek, (char*)p_peek );
 186             if( ReSynch( p_demux ) )
 187             {
 188                 return -1;
 189             }
 190         }
 191     }
 192
 193     if( stream_Read( p_demux->s, header, 5 ) < 5 )
 194     {
 195         msg_Warn( p_demux, "cannot read" );
 196         return 0;
 197     }
 198
 199     /* Set PCR */
 200     es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
 201
 202     /* Read video */
 203     i_size = ( header[0] >> 4 ) | ( header[1] << 4 ) | ( header[2] << 12 );
 204     if( i_size > 0 )
 205     {
 206         /* extra data ? */
 207         if( (header[0]&0x0f) != 0x0 )
 208         {
 209             uint8_t      aux[6];
 210             int          i_aux;
 211             vlc_fourcc_t fcc;
 212             if( stream_Read( p_demux->s, aux, 6 ) < 6 )
 213             {
 214                 msg_Warn( p_demux, "cannot read" );
 215                 return 0;
 216             }
 217             i_aux = GetWLE( aux );
 218             fcc   = VLC_FOURCC( aux[2], aux[3], aux[4], aux[5] );
 219
 220             msg_Dbg( p_demux, "Belekas: %d - size=%d fcc=%4.4s",
 221                      header[0]&0xf, i_aux, (char*)&fcc );
 222
 223             if( fcc == VLC_FOURCC( 'S', 'U', 'B', 'T' ) && i_aux > 2 )
 224             {
 225                 if( p_sys->p_sub == NULL )
 226                 {
 227                     p_sys->fmt_sub.i_codec = VLC_FOURCC( 's', 'u', 'b', 't' );
 228                     p_sys->p_sub = es_out_Add( p_demux->out, &p_sys->fmt_sub );
 229                     es_out_Control( p_demux->out, ES_OUT_SET_ES, p_sys->p_sub );
 230                 }
 231                 stream_Read( p_demux->s, NULL, 2 );
 232
 233                 if( ( p_frame = stream_Block( p_demux->s, i_aux - 2 ) ) )
 234                 {
 235                     uint8_t *p = p_frame->p_buffer;
 236
 237                     while( p < &p_frame->p_buffer[p_frame->i_buffer] && *p != 0 )
 238                     {
 239                         p++;
 240                     }
 241                     if( *p == 0 && p + 1 < &p_frame->p_buffer[p_frame->i_buffer] )
 242                     {
 243                         p_frame->i_buffer -= p + 1 - p_frame->p_buffer;
 244                         p_frame->p_buffer = p + 1;
 245                     }
 246
 247                     /* Skip the first part (it is the language name) */
 248                     p_frame->i_pts = p_sys->i_pcr;
 249                     p_frame->i_dts = p_sys->i_pcr + 4000000;    /* 4s */
 250
 251                     es_out_Send( p_demux->out, p_sys->p_sub, p_frame );
 252                 }
 253             }
 254             else
 255             {
 256                 /* We skip this extra data */
 257                 if( stream_Read( p_demux->s, NULL, i_aux ) < i_aux )
 258                 {
 259                     msg_Warn( p_demux, "cannot read" );
 260                     return 0;
 261                 }
 262             }
 263             i_size -= 6 + i_aux;
 264         }
 265
 266         /* msg_Dbg( p_demux, "frame video size=%d", i_size ); */
 267         if( i_size > 0 && ( p_frame = stream_Block( p_demux->s, i_size ) ) )
 268         {
 269             p_frame->i_dts = p_sys->i_pcr;
 270             es_out_Send( p_demux->out, p_sys->p_video, p_frame );
 271         }
 272     }
 273
 274     /* Read audio */
 275     i_size = header[3] | ( header[4] << 8 );
 276     if( i_size > 0 )
 277     {
 278         /* msg_Dbg( p_demux, "frame audio size=%d", i_size ); */
 279         if( p_sys->fmt_audio.i_codec == VLC_FOURCC( 'a', 'r', 'a', 'w' ) )
 280         {
 281             uint8_t h[4];
 282             stream_Read( p_demux->s, h, 4 );
 283
 284             p_sys->fmt_audio.audio.i_channels = h[1];
 285             p_sys->fmt_audio.audio.i_rate = GetWLE( &h[2] );
 286
 287             i_size -= 4;
 288         }
 289         if( p_sys->p_audio == NULL )
 290         {
 291             p_sys->p_audio = es_out_Add( p_demux->out, &p_sys->fmt_audio );
 292         }
 293
 294         if( ( p_frame = stream_Block( p_demux->s, i_size ) ) )
 295         {
 296             p_frame->i_dts =
 297             p_frame->i_pts = p_sys->i_pcr;
 298             es_out_Send( p_demux->out, p_sys->p_audio, p_frame );
 299         }
 300     }
 301
 302     p_sys->i_pcr += p_sys->i_pcr_inc;
 303     if( p_sys->i_time >= 0 )
 304     {
 305         p_sys->i_time += p_sys->i_pcr_inc;
 306     }
 307
 308     return 1;
 309 }
 310
 311 /*****************************************************************************
 312  * Control:
 313  *****************************************************************************/
 314 static int Control( demux_t *p_demux, int i_query, va_list args )
 315 {
 316     demux_sys_t *p_sys = p_demux->p_sys;
 317     double f, *pf;
 318     int64_t i64, *pi64;
 319
 320     switch( i_query )
 321     {
 322         case DEMUX_GET_POSITION:
 323             pf = (double*) va_arg( args, double* );
 324             i64 = stream_Size( p_demux->s );
 325             if( i64 > 0 )
 326             {
 327                 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
 328             }
 329             else
 330             {
 331                 *pf = 0.0;
 332             }
 333             return VLC_SUCCESS;
 334
 335         case DEMUX_SET_POSITION:
 336             f = (double) va_arg( args, double );
 337             i64 = stream_Size( p_demux->s );
 338
 339             es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 340             if( stream_Seek( p_demux->s, (int64_t)(i64 * f) ) || ReSynch( p_demux ) )
 341             {
 342                 return VLC_EGENERIC;
 343             }
 344             p_sys->i_time = -1; /* Invalidate time display */
 345             return VLC_SUCCESS;
 346
 347         case DEMUX_GET_TIME:
 348             pi64 = (int64_t*)va_arg( args, int64_t * );
 349             if( p_sys->i_time < 0 )
 350             {
 351                 *pi64 = 0;
 352                 return VLC_EGENERIC;
 353             }
 354             *pi64 = p_sys->i_time;
 355             return VLC_SUCCESS;
 356
 357 #if 0
 358         case DEMUX_GET_LENGTH:
 359             pi64 = (int64_t*)va_arg( args, int64_t * );
 360             if( p_sys->i_mux_rate > 0 )
 361             {
 362                 *pi64 = (int64_t)1000000 * ( stream_Size( p_demux->s ) / 50 ) / p_sys->i_mux_rate;
 363                 return VLC_SUCCESS;
 364             }
 365             *pi64 = 0;
 366             return VLC_EGENERIC;
 367
 368 #endif
 369         case DEMUX_GET_FPS:
 370             pf = (double*)va_arg( args, double * );
 371             *pf = (double)1000000.0 / (double)p_sys->i_pcr_inc;
 372             return VLC_SUCCESS;
 373
 374         case DEMUX_SET_TIME:
 375         default:
 376             return VLC_EGENERIC;
 377     }
 378 }
 379
 380 /*****************************************************************************
 381  * ReSynch:
 382  *****************************************************************************/
 383 static int ReSynch( demux_t *p_demux )
 384 {
 385     uint8_t  *p_peek;
 386     int      i_skip;
 387     int      i_peek;
 388
 389     while( !p_demux->b_die )
 390     {
 391         if( ( i_peek = stream_Peek( p_demux->s, &p_peek, 1024 ) ) < 8 )
 392         {
 393             return VLC_EGENERIC;
 394         }
 395         i_skip = 0;
 396
 397         while( i_skip < i_peek - 4 )
 398         {
 399             if( !strncmp( (char *)p_peek, "NSVf", 4 )
 400                     || !strncmp( (char *)p_peek, "NSVs", 4 ) )
 401             {
 402                 if( i_skip > 0 )
 403                 {
 404                     stream_Read( p_demux->s, NULL, i_skip );
 405                 }
 406                 return VLC_SUCCESS;
 407             }
 408             p_peek++;
 409             i_skip++;
 410         }
 411
 412         stream_Read( p_demux->s, NULL, i_skip );
 413     }
 414     return VLC_EGENERIC;
 415 }
 416
 417 /*****************************************************************************
 418  * ReadNSVf:
 419  *****************************************************************************/
 420 static int ReadNSVf( demux_t *p_demux )
 421 {
 422     /* demux_sys_t *p_sys = p_demux->p_sys; */
 423     uint8_t     *p;
 424     int         i_size;
 425
 426     msg_Dbg( p_demux, "new NSVf chunk" );
 427     if( stream_Peek( p_demux->s, &p, 8 ) < 8 )
 428     {
 429         return VLC_EGENERIC;
 430     }
 431
 432     i_size = GetDWLE( &p[4] );
 433     msg_Dbg( p_demux, "    - size=%d", i_size );
 434
 435     return stream_Read( p_demux->s, NULL, i_size ) == i_size ? VLC_SUCCESS : VLC_EGENERIC;
 436 }
 437 /*****************************************************************************
 438  * ReadNSVf:
 439  *****************************************************************************/
 440 static int ReadNSVs( demux_t *p_demux )
 441 {
 442     demux_sys_t *p_sys = p_demux->p_sys;
 443     uint8_t      header[19];
 444     vlc_fourcc_t fcc;
 445
 446     if( stream_Read( p_demux->s, header, 19 ) < 19 )
 447     {
 448         msg_Warn( p_demux, "cannot read" );
 449         return VLC_EGENERIC;
 450     }
 451
 452     /* Video */
 453     switch( ( fcc = VLC_FOURCC( header[4], header[5], header[6], header[7] ) ) )
 454     {
 455         case VLC_FOURCC( 'V', 'P', '3', ' ' ):
 456         case VLC_FOURCC( 'V', 'P', '3', '1' ):
 457             fcc = VLC_FOURCC( 'V', 'P', '3', '1' );
 458             break;
 459         case VLC_FOURCC( 'V', 'P', '6', '0' ):
 460         case VLC_FOURCC( 'V', 'P', '6', '1' ):
 461         case VLC_FOURCC( 'V', 'P', '6', '2' ):
 462         case VLC_FOURCC( 'N', 'O', 'N', 'E' ):
 463             break;
 464         default:
 465             msg_Warn( p_demux, "unknown codec %4.4s", (char *)&fcc );
 466             break;
 467     }
 468     if( fcc != VLC_FOURCC( 'N', 'O', 'N', 'E' ) && fcc != p_sys->fmt_video.i_codec  )
 469     {
 470         es_format_Init( &p_sys->fmt_video, VIDEO_ES, fcc );
 471         p_sys->fmt_video.video.i_width = GetWLE( &header[12] );
 472         p_sys->fmt_video.video.i_height = GetWLE( &header[14] );
 473         if( p_sys->p_video )
 474         {
 475             es_out_Del( p_demux->out, p_sys->p_video );
 476         }
 477         p_sys->p_video = es_out_Add( p_demux->out, &p_sys->fmt_video );
 478
 479         msg_Dbg( p_demux, "    - video `%4.4s' %dx%d",
 480                  (char*)&fcc,
 481                  p_sys->fmt_video.video.i_width,
 482                  p_sys->fmt_video.video.i_height );
 483     }
 484
 485     /* Audio */
 486     switch( ( fcc = VLC_FOURCC( header[8], header[9], header[10], header[11] ) ) )
 487     {
 488         case VLC_FOURCC( 'M', 'P', '3', ' ' ):
 489             fcc = VLC_FOURCC( 'm', 'p', 'g', 'a' );
 490             break;
 491         case VLC_FOURCC( 'P', 'C', 'M', ' ' ):
 492             fcc = VLC_FOURCC( 'a', 'r', 'a', 'w' );
 493             break;
 494         case VLC_FOURCC( 'A', 'A', 'C', ' ' ):
 495         case VLC_FOURCC( 'A', 'A', 'C', 'P' ):
 496             fcc = VLC_FOURCC( 'm', 'p', '4', 'a' );
 497             break;
 498         case VLC_FOURCC( 'N', 'O', 'N', 'E' ):
 499             break;
 500         default:
 501             msg_Warn( p_demux, "unknown codec %4.4s", (char *)&fcc );
 502             break;
 503     }
 504
 505     if( fcc != VLC_FOURCC( 'N', 'O', 'N', 'E' ) && fcc != p_sys->fmt_audio.i_codec )
 506     {
 507         msg_Dbg( p_demux, "    - audio `%4.4s'", (char*)&fcc );
 508
 509         if( p_sys->p_audio )
 510         {
 511             es_out_Del( p_demux->out, p_sys->p_audio );
 512             p_sys->p_audio = NULL;
 513         }
 514         es_format_Init( &p_sys->fmt_audio, AUDIO_ES, fcc );
 515     }
 516
 517     if( header[16]&0x80 )
 518     {
 519         /* Fractional frame rate */
 520         switch( header[16]&0x03 )
 521         {
 522             case 0: /* 30 fps */
 523                 p_sys->i_pcr_inc = 33333; /* 300000/9 */
 524                 break;
 525             case 1: /* 29.97 fps */
 526                 p_sys->i_pcr_inc = 33367; /* 300300/9 */
 527                 break;
 528             case 2: /* 25 fps */
 529                 p_sys->i_pcr_inc = 40000; /* 360000/9 */
 530                 break;
 531             case 3: /* 23.98 fps */
 532                 p_sys->i_pcr_inc = 41700; /* 375300/9 */
 533                 break;
 534         }
 535
 536         if( header[16] < 0xc0 )
 537             p_sys->i_pcr_inc = p_sys->i_pcr_inc * (((header[16] ^ 0x80) >> 2 ) +1 );
 538         else
 539             p_sys->i_pcr_inc = p_sys->i_pcr_inc / (((header[16] ^ 0xc0) >> 2 ) +1 );
 540     }
 541     else if( header[16] != 0 )
 542     {
 543         /* Integer frame rate */
 544         p_sys->i_pcr_inc = 1000000 / header[16];
 545     }
 546     else
 547     {
 548         msg_Dbg( p_demux, "invalid fps (0x00)" );
 549         p_sys->i_pcr_inc = 40000;
 550     }
 551     //msg_Dbg( p_demux, "    - fps=%.3f", 1000000.0 / (double)p_sys->i_pcr_inc );
 552
 553     return VLC_SUCCESS;
 554 }
 555