git.sesse.net Git - vlc/blob - src/input/demux.c

   1 /*****************************************************************************
   2  * demux.c
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Author: 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 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include "demux.h"
  29 #include <libvlc.h>
  30 #include <vlc_codec.h>
  31 #include <vlc_meta.h>
  32
  33 static bool SkipID3Tag( demux_t * );
  34 static bool SkipAPETag( demux_t *p_demux );
  35
  36 /*****************************************************************************
  37  * demux_New:
  38  *  if s is NULL then load a access_demux
  39  *****************************************************************************/
  40 demux_t *__demux_New( vlc_object_t *p_obj,
  41                        const char *psz_access, const char *psz_demux,
  42                        const char *psz_path,
  43                        stream_t *s, es_out_t *out, bool b_quick )
  44 {
  45     static const char typename[] = "demux";
  46     demux_t *p_demux = vlc_custom_create( p_obj, sizeof( *p_demux ),
  47                                           VLC_OBJECT_GENERIC, typename );
  48     const char *psz_module;
  49
  50     if( p_demux == NULL ) return NULL;
  51
  52     /* Parse URL */
  53     p_demux->psz_access = strdup( psz_access );
  54     p_demux->psz_demux  = strdup( psz_demux );
  55     p_demux->psz_path   = strdup( psz_path );
  56
  57     /* Take into account "demux" to be able to do :demux=dump */
  58     if( p_demux->psz_demux && *p_demux->psz_demux == '\0' )
  59     {
  60         free( p_demux->psz_demux );
  61         p_demux->psz_demux = var_GetNonEmptyString( p_obj, "demux" );
  62         if( p_demux->psz_demux == NULL )
  63             p_demux->psz_demux = strdup( "" );
  64     }
  65
  66     if( !b_quick )
  67     {
  68         msg_Dbg( p_obj, "creating demux: access='%s' demux='%s' path='%s'",
  69                  p_demux->psz_access, p_demux->psz_demux, p_demux->psz_path );
  70     }
  71
  72     p_demux->s          = s;
  73     p_demux->out        = out;
  74
  75     p_demux->pf_demux   = NULL;
  76     p_demux->pf_control = NULL;
  77     p_demux->p_sys      = NULL;
  78     p_demux->info.i_update = 0;
  79     p_demux->info.i_title  = 0;
  80     p_demux->info.i_seekpoint = 0;
  81
  82     if( s ) psz_module = p_demux->psz_demux;
  83     else psz_module = p_demux->psz_access;
  84
  85     if( s && *psz_module == '\0' && strrchr( p_demux->psz_path, '.' ) )
  86     {
  87        /* XXX: add only file without any problem here and with strong detection.
  88         *  - no .mp3, .a52, ... (aac is added as it works only by file ext
  89         *     anyway
  90         *  - wav can't be added 'cause of a52 and dts in them as raw audio
  91          */
  92          static const struct { char ext[5]; char demux[9]; } exttodemux[] =
  93          {
  94             { "aac",  "aac" },
  95             { "aiff", "aiff" },
  96             { "asf",  "asf" }, { "wmv",  "asf" }, { "wma",  "asf" },
  97             { "avi",  "avi" },
  98             { "au",   "au" },
  99             { "flac", "flac" },
 100             { "dv",   "dv" },
 101             { "m3u",  "playlist" },
 102             { "mkv",  "mkv" }, { "mka",  "mkv" }, { "mks",  "mkv" },
 103             { "mp4",  "mp4" }, { "m4a",  "mp4" }, { "mov",  "mp4" }, { "moov", "mp4" },
 104             { "mod",  "mod" }, { "xm",   "mod" },
 105             { "nsv",  "nsv" },
 106             { "ogg",  "ogg" }, { "ogm",  "ogg" },
 107             { "pva",  "pva" },
 108             { "rm",   "rm" },
 109             { "m4v",  "m4v" },
 110             { "h264", "h264" },
 111             { "voc",  "voc" },
 112             { "mid",  "smf" },
 113             { "rmi",  "smf" },
 114             { "",  "" },
 115         };
 116         /* Here, we don't mind if it does not work, it must be quick */
 117         static const struct { char ext[4]; char demux[5]; } exttodemux_quick[] =
 118         {
 119             { "mp3", "mpga" },
 120             { "ogg", "ogg" },
 121             { "wma", "asf" },
 122             { "", "" }
 123         };
 124
 125         const char *psz_ext = strrchr( p_demux->psz_path, '.' ) + 1;
 126         int  i;
 127
 128         if( !b_quick )
 129         {
 130             for( i = 0; exttodemux[i].ext[0]; i++ )
 131             {
 132                 if( !strcasecmp( psz_ext, exttodemux[i].ext ) )
 133                 {
 134                     psz_module = exttodemux[i].demux;
 135                     break;
 136                 }
 137             }
 138         }
 139         else
 140         {
 141             for( i = 0; exttodemux_quick[i].ext[0]; i++ )
 142             {
 143                 if( !strcasecmp( psz_ext, exttodemux_quick[i].ext ) )
 144                 {
 145                     psz_module = exttodemux_quick[i].demux;
 146                     break;
 147                 }
 148             }
 149
 150         }
 151     }
 152
 153     /* Before module_need (for var_Create...) */
 154     vlc_object_attach( p_demux, p_obj );
 155
 156     if( s )
 157     {
 158         /* ID3/APE tags will mess-up demuxer probing so we skip it here.
 159          * ID3/APE parsers will called later on in the demuxer to access the
 160          * skipped info. */
 161         if( !SkipID3Tag( p_demux ) )
 162             SkipAPETag( p_demux );
 163
 164         p_demux->p_module =
 165             module_need( p_demux, "demux", psz_module,
 166                          !strcmp( psz_module, p_demux->psz_demux ) ?
 167                          true : false );
 168     }
 169     else
 170     {
 171         p_demux->p_module =
 172             module_need( p_demux, "access_demux", psz_module,
 173                          !strcmp( psz_module, p_demux->psz_access ) ?
 174                          true : false );
 175     }
 176
 177     if( p_demux->p_module == NULL )
 178     {
 179         vlc_object_detach( p_demux );
 180         free( p_demux->psz_path );
 181         free( p_demux->psz_demux );
 182         free( p_demux->psz_access );
 183         vlc_object_release( p_demux );
 184         return NULL;
 185     }
 186
 187     return p_demux;
 188 }
 189
 190 /*****************************************************************************
 191  * demux_Delete:
 192  *****************************************************************************/
 193 void demux_Delete( demux_t *p_demux )
 194 {
 195     module_unneed( p_demux, p_demux->p_module );
 196     vlc_object_detach( p_demux );
 197
 198     free( p_demux->psz_path );
 199     free( p_demux->psz_demux );
 200     free( p_demux->psz_access );
 201
 202     vlc_object_release( p_demux );
 203 }
 204
 205 /*****************************************************************************
 206  * demux_vaControlHelper:
 207  *****************************************************************************/
 208 int demux_vaControlHelper( stream_t *s,
 209                             int64_t i_start, int64_t i_end,
 210                             int64_t i_bitrate, int i_align,
 211                             int i_query, va_list args )
 212 {
 213     int64_t i_tell;
 214     double  f, *pf;
 215     int64_t i64, *pi64;
 216
 217     if( i_end < 0 )    i_end   = stream_Size( s );
 218     if( i_start < 0 )  i_start = 0;
 219     if( i_align <= 0 ) i_align = 1;
 220     i_tell = stream_Tell( s );
 221
 222     switch( i_query )
 223     {
 224         case DEMUX_GET_LENGTH:
 225             pi64 = (int64_t*)va_arg( args, int64_t * );
 226             if( i_bitrate > 0 && i_end > i_start )
 227             {
 228                 *pi64 = INT64_C(8000000) * (i_end - i_start) / i_bitrate;
 229                 return VLC_SUCCESS;
 230             }
 231             return VLC_EGENERIC;
 232
 233         case DEMUX_GET_TIME:
 234             pi64 = (int64_t*)va_arg( args, int64_t * );
 235             if( i_bitrate > 0 && i_end > i_start )
 236             {
 237                 *pi64 = INT64_C(8000000) * (i_tell - i_start) / i_bitrate;
 238                 return VLC_SUCCESS;
 239             }
 240             return VLC_EGENERIC;
 241
 242         case DEMUX_GET_POSITION:
 243             pf = (double*)va_arg( args, double * );
 244             if( i_start < i_end )
 245             {
 246                 *pf = (double)( i_tell - i_start ) /
 247                       (double)( i_end  - i_start );
 248                 return VLC_SUCCESS;
 249             }
 250             return VLC_EGENERIC;
 251
 252
 253         case DEMUX_SET_POSITION:
 254             f = (double)va_arg( args, double );
 255             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
 256             {
 257                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
 258
 259                 if( stream_Seek( s, i_start + i_block * i_align ) )
 260                 {
 261                     return VLC_EGENERIC;
 262                 }
 263                 return VLC_SUCCESS;
 264             }
 265             return VLC_EGENERIC;
 266
 267         case DEMUX_SET_TIME:
 268             i64 = (int64_t)va_arg( args, int64_t );
 269             if( i_bitrate > 0 && i64 >= 0 )
 270             {
 271                 int64_t i_block = i64 * i_bitrate / INT64_C(8000000) / i_align;
 272                 if( stream_Seek( s, i_start + i_block * i_align ) )
 273                 {
 274                     return VLC_EGENERIC;
 275                 }
 276                 return VLC_SUCCESS;
 277             }
 278             return VLC_EGENERIC;
 279
 280         case DEMUX_GET_FPS:
 281         case DEMUX_GET_META:
 282         case DEMUX_HAS_UNSUPPORTED_META:
 283         case DEMUX_SET_NEXT_DEMUX_TIME:
 284         case DEMUX_GET_TITLE_INFO:
 285         case DEMUX_SET_GROUP:
 286         case DEMUX_GET_ATTACHMENTS:
 287         case DEMUX_CAN_RECORD:
 288         case DEMUX_SET_RECORD_STATE:
 289             return VLC_EGENERIC;
 290
 291         default:
 292             msg_Err( s, "unknown query in demux_vaControlDefault" );
 293             return VLC_EGENERIC;
 294     }
 295 }
 296
 297 /****************************************************************************
 298  * stream_Demux*: create a demuxer for an outpout stream (allow demuxer chain)
 299  ****************************************************************************/
 300 typedef struct
 301 {
 302     /* Data buffer */
 303     block_fifo_t *p_fifo;
 304     block_t      *p_block;
 305
 306     int64_t     i_pos;
 307
 308     /* Demuxer */
 309     char        *psz_name;
 310     es_out_t    *out;
 311     demux_t     *p_demux;
 312
 313 } d_stream_sys_t;
 314
 315 static int  DStreamRead   ( stream_t *, void *p_read, unsigned int i_read );
 316 static int  DStreamPeek   ( stream_t *, const uint8_t **pp_peek, unsigned int i_peek );
 317 static int  DStreamControl( stream_t *, int i_query, va_list );
 318 static void DStreamDelete ( stream_t * );
 319 static void* DStreamThread ( vlc_object_t * );
 320
 321
 322 stream_t *__stream_DemuxNew( vlc_object_t *p_obj, const char *psz_demux,
 323                              es_out_t *out )
 324 {
 325     /* We create a stream reader, and launch a thread */
 326     stream_t       *s;
 327     d_stream_sys_t *p_sys;
 328
 329     s = stream_CommonNew( p_obj );
 330     if( s == NULL )
 331         return NULL;
 332     s->pf_read   = DStreamRead;
 333     s->pf_peek   = DStreamPeek;
 334     s->pf_control= DStreamControl;
 335     s->pf_destroy= DStreamDelete;
 336
 337     s->p_sys = malloc( sizeof( d_stream_sys_t) );
 338     if( s->p_sys == NULL )
 339     {
 340         stream_CommonDelete( s );
 341         return NULL;
 342     }
 343     p_sys = (d_stream_sys_t*)s->p_sys;
 344
 345     p_sys->i_pos = 0;
 346     p_sys->out = out;
 347     p_sys->p_demux = NULL;
 348     p_sys->p_block = NULL;
 349     p_sys->psz_name = strdup( psz_demux );
 350
 351     /* decoder fifo */
 352     if( ( p_sys->p_fifo = block_FifoNew() ) == NULL )
 353     {
 354         stream_CommonDelete( s );
 355         free( p_sys->psz_name );
 356         free( p_sys );
 357         return NULL;
 358     }
 359
 360     if( vlc_thread_create( s, "stream out", DStreamThread,
 361                            VLC_THREAD_PRIORITY_INPUT, false ) )
 362     {
 363         stream_CommonDelete( s );
 364         free( p_sys->psz_name );
 365         free( p_sys );
 366         return NULL;
 367     }
 368
 369     return s;
 370 }
 371
 372 void stream_DemuxSend( stream_t *s, block_t *p_block )
 373 {
 374     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 375     if( p_block ) block_FifoPut( p_sys->p_fifo, p_block );
 376 }
 377
 378 static void DStreamDelete( stream_t *s )
 379 {
 380     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 381     block_t *p_empty;
 382
 383     vlc_object_kill( s );
 384     if( p_sys->p_demux )
 385         vlc_object_kill( p_sys->p_demux );
 386     p_empty = block_New( s, 1 ); p_empty->i_buffer = 0;
 387     block_FifoPut( p_sys->p_fifo, p_empty );
 388     vlc_thread_join( s );
 389
 390     if( p_sys->p_demux ) demux_Delete( p_sys->p_demux );
 391     if( p_sys->p_block ) block_Release( p_sys->p_block );
 392
 393     block_FifoRelease( p_sys->p_fifo );
 394     free( p_sys->psz_name );
 395     free( p_sys );
 396
 397     stream_CommonDelete( s );
 398 }
 399
 400
 401 static int DStreamRead( stream_t *s, void *p_read, unsigned int i_read )
 402 {
 403     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 404     uint8_t *p_out = p_read;
 405     int i_out = 0;
 406
 407     //msg_Dbg( s, "DStreamRead: wanted %d bytes", i_read );
 408
 409     while( !s->b_die && !s->b_error && i_read )
 410     {
 411         block_t *p_block = p_sys->p_block;
 412         int i_copy;
 413
 414         if( !p_block )
 415         {
 416             p_block = block_FifoGet( p_sys->p_fifo );
 417             if( !p_block ) s->b_error = 1;
 418             p_sys->p_block = p_block;
 419         }
 420
 421         if( p_block && i_read )
 422         {
 423             i_copy = __MIN( i_read, p_block->i_buffer );
 424             if( p_out && i_copy ) memcpy( p_out, p_block->p_buffer, i_copy );
 425             i_read -= i_copy;
 426             i_out += i_copy;
 427             p_block->i_buffer -= i_copy;
 428             p_block->p_buffer += i_copy;
 429
 430             if( !p_block->i_buffer )
 431             {
 432                 block_Release( p_block );
 433                 p_sys->p_block = NULL;
 434             }
 435         }
 436     }
 437
 438     p_sys->i_pos += i_out;
 439     return i_out;
 440 }
 441
 442 static int DStreamPeek( stream_t *s, const uint8_t **pp_peek, unsigned int i_peek )
 443 {
 444     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 445     block_t **pp_block = &p_sys->p_block;
 446     int i_out = 0;
 447     *pp_peek = 0;
 448
 449     //msg_Dbg( s, "DStreamPeek: wanted %d bytes", i_peek );
 450
 451     while( !s->b_die && !s->b_error && i_peek )
 452     {
 453         int i_copy;
 454
 455         if( !*pp_block )
 456         {
 457             *pp_block = block_FifoGet( p_sys->p_fifo );
 458             if( !*pp_block ) s->b_error = 1;
 459         }
 460
 461         if( *pp_block && i_peek )
 462         {
 463             i_copy = __MIN( i_peek, (*pp_block)->i_buffer );
 464             i_peek -= i_copy;
 465             i_out += i_copy;
 466
 467             if( i_peek ) pp_block = &(*pp_block)->p_next;
 468         }
 469     }
 470
 471     if( p_sys->p_block )
 472     {
 473         p_sys->p_block = block_ChainGather( p_sys->p_block );
 474         *pp_peek = p_sys->p_block->p_buffer;
 475     }
 476
 477     return i_out;
 478 }
 479
 480 static int DStreamControl( stream_t *s, int i_query, va_list args )
 481 {
 482     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 483     int64_t    *p_i64;
 484     bool *p_b;
 485     int        *p_int;
 486
 487     switch( i_query )
 488     {
 489         case STREAM_GET_SIZE:
 490             p_i64 = (int64_t*) va_arg( args, int64_t * );
 491             *p_i64 = 0;
 492             return VLC_SUCCESS;
 493
 494         case STREAM_CAN_SEEK:
 495             p_b = (bool*) va_arg( args, bool * );
 496             *p_b = false;
 497             return VLC_SUCCESS;
 498
 499         case STREAM_CAN_FASTSEEK:
 500             p_b = (bool*) va_arg( args, bool * );
 501             *p_b = false;
 502             return VLC_SUCCESS;
 503
 504         case STREAM_GET_POSITION:
 505             p_i64 = (int64_t*) va_arg( args, int64_t * );
 506             *p_i64 = p_sys->i_pos;
 507             return VLC_SUCCESS;
 508
 509         case STREAM_SET_POSITION:
 510         {
 511             int64_t i64 = (int64_t)va_arg( args, int64_t );
 512             int i_skip;
 513             if( i64 < p_sys->i_pos ) return VLC_EGENERIC;
 514             i_skip = i64 - p_sys->i_pos;
 515
 516             while( i_skip > 0 )
 517             {
 518                 int i_read = DStreamRead( s, NULL, (long)i_skip );
 519                 if( i_read <= 0 ) return VLC_EGENERIC;
 520                 i_skip -= i_read;
 521             }
 522             return VLC_SUCCESS;
 523         }
 524
 525         case STREAM_GET_MTU:
 526             p_int = (int*) va_arg( args, int * );
 527             *p_int = 0;
 528             return VLC_SUCCESS;
 529
 530         case STREAM_CONTROL_ACCESS:
 531         case STREAM_GET_CONTENT_TYPE:
 532         case STREAM_SET_RECORD_STATE:
 533             return VLC_EGENERIC;
 534
 535         default:
 536             msg_Err( s, "invalid DStreamControl query=0x%x", i_query );
 537             return VLC_EGENERIC;
 538     }
 539 }
 540
 541 static void* DStreamThread( vlc_object_t* p_this )
 542 {
 543     stream_t *s = (stream_t *)p_this;
 544     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 545     demux_t *p_demux;
 546     int canc = vlc_savecancel();
 547
 548     /* Create the demuxer */
 549     if( !(p_demux = demux_New( s, "", p_sys->psz_name, "", s, p_sys->out,
 550                                false )) )
 551     {
 552         return NULL;
 553     }
 554
 555     p_sys->p_demux = p_demux;
 556
 557     /* Main loop */
 558     while( !s->b_die && !p_demux->b_die )
 559     {
 560         if( demux_Demux( p_demux ) <= 0 ) break;
 561     }
 562
 563     vlc_restorecancel( canc );
 564     vlc_object_kill( p_demux );
 565     return NULL;
 566 }
 567
 568 /****************************************************************************
 569  * Utility functions
 570  ****************************************************************************/
 571 decoder_t *demux_PacketizerNew( demux_t *p_demux, es_format_t *p_fmt, const char *psz_msg )
 572 {
 573     decoder_t *p_packetizer = vlc_object_create( p_demux, VLC_OBJECT_PACKETIZER );
 574
 575     if( !p_packetizer )
 576     {
 577         es_format_Clean( p_fmt );
 578         return NULL;
 579     }
 580
 581     p_packetizer->pf_decode_audio = NULL;
 582     p_packetizer->pf_decode_video = NULL;
 583     p_packetizer->pf_decode_sub = NULL;
 584     p_packetizer->pf_packetize = NULL;
 585
 586     p_packetizer->fmt_in = *p_fmt;
 587     es_format_Init( &p_packetizer->fmt_out, UNKNOWN_ES, 0 );
 588
 589     p_packetizer->p_module = module_need( p_packetizer, "packetizer", NULL, 0 );
 590     if( !p_packetizer->p_module )
 591     {
 592         es_format_Clean( p_fmt );
 593         vlc_object_release( p_packetizer );
 594         msg_Err( p_demux, "cannot find packetizer for %s", psz_msg );
 595         return NULL;
 596     }
 597
 598     return p_packetizer;
 599 }
 600 void demux_PacketizerDestroy( decoder_t *p_packetizer )
 601 {
 602     if( p_packetizer->p_module )
 603         module_unneed( p_packetizer, p_packetizer->p_module );
 604     es_format_Clean( &p_packetizer->fmt_in );
 605     if( p_packetizer->p_description )
 606         vlc_meta_Delete( p_packetizer->p_description );
 607     vlc_object_release( p_packetizer );
 608 }
 609
 610 static bool SkipID3Tag( demux_t *p_demux )
 611 {
 612     const uint8_t *p_peek;
 613     uint8_t version, revision;
 614     int i_size;
 615     int b_footer;
 616
 617     if( !p_demux->s )
 618         return false;
 619
 620     /* Get 10 byte id3 header */
 621     if( stream_Peek( p_demux->s, &p_peek, 10 ) < 10 )
 622         return false;
 623
 624     if( memcmp( p_peek, "ID3", 3 ) )
 625         return false;
 626
 627     version = p_peek[3];
 628     revision = p_peek[4];
 629     b_footer = p_peek[5] & 0x10;
 630     i_size = (p_peek[6]<<21) + (p_peek[7]<<14) + (p_peek[8]<<7) + p_peek[9];
 631
 632     if( b_footer ) i_size += 10;
 633     i_size += 10;
 634
 635     /* Skip the entire tag */
 636     stream_Read( p_demux->s, NULL, i_size );
 637
 638     msg_Dbg( p_demux, "ID3v2.%d revision %d tag found, skipping %d bytes",
 639              version, revision, i_size );
 640     return true;
 641 }
 642 static bool SkipAPETag( demux_t *p_demux )
 643 {
 644     const uint8_t *p_peek;
 645     int i_version;
 646     int i_size;
 647     uint32_t flags;
 648
 649     if( !p_demux->s )
 650         return false;
 651
 652     /* Get 32 byte ape header */
 653     if( stream_Peek( p_demux->s, &p_peek, 32 ) < 32 )
 654         return false;
 655
 656     if( memcmp( p_peek, "APETAGEX", 8 ) )
 657         return false;
 658
 659     i_version = GetDWLE( &p_peek[8] );
 660     flags = GetDWLE( &p_peek[8+4+4] );
 661     if( ( i_version != 1000 && i_version != 2000 ) || !( flags & (1<<29) ) )
 662         return false;
 663
 664     i_size = GetDWLE( &p_peek[8+4] ) + ( (flags&(1<<30)) ? 32 : 0 );
 665
 666     /* Skip the entire tag */
 667     stream_Read( p_demux->s, NULL, i_size );
 668
 669     msg_Dbg( p_demux, "AP2 v%d tag found, skipping %d bytes",
 670              i_version/1000, i_size );
 671     return true;
 672 }
 673