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