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 #include <vlc/vlc.h>
  25
  26 #include "input_internal.h"
  27
  28 static vlc_bool_t SkipID3Tag( demux_t * );
  29 static vlc_bool_t SkipAPETag( demux_t *p_demux );
  30
  31 /*****************************************************************************
  32  * demux2_New:
  33  *  if s is NULL then load a access_demux
  34  *****************************************************************************/
  35 demux_t *__demux2_New( vlc_object_t *p_obj,
  36                        const char *psz_access, const char *psz_demux,
  37                        const char *psz_path,
  38                        stream_t *s, es_out_t *out, vlc_bool_t b_quick )
  39 {
  40     demux_t *p_demux = vlc_object_create( p_obj, VLC_OBJECT_DEMUX );
  41     const char *psz_module;
  42
  43     if( p_demux == NULL ) return NULL;
  44
  45     /* Parse URL */
  46     p_demux->psz_access = strdup( psz_access );
  47     p_demux->psz_demux  = strdup( psz_demux );
  48     p_demux->psz_path   = strdup( psz_path );
  49
  50     /* Take into account "demux" to be able to do :demux=dump */
  51     if( *p_demux->psz_demux == '\0' )
  52     {
  53         free( p_demux->psz_demux );
  54         p_demux->psz_demux = var_GetNonEmptyString( p_obj, "demux" );
  55         if( p_demux->psz_demux == NULL )
  56             p_demux->psz_demux = strdup( "" );
  57     }
  58
  59     if( !b_quick )
  60     {
  61         msg_Dbg( p_obj, "creating demux: access='%s' demux='%s' path='%s'",
  62                  p_demux->psz_access, p_demux->psz_demux, p_demux->psz_path );
  63     }
  64
  65     p_demux->s          = s;
  66     p_demux->out        = out;
  67
  68     p_demux->pf_demux   = NULL;
  69     p_demux->pf_control = NULL;
  70     p_demux->p_sys      = NULL;
  71     p_demux->info.i_update = 0;
  72     p_demux->info.i_title  = 0;
  73     p_demux->info.i_seekpoint = 0;
  74
  75     if( s ) psz_module = p_demux->psz_demux;
  76     else psz_module = p_demux->psz_access;
  77
  78     if( s && *psz_module == '\0' && strrchr( p_demux->psz_path, '.' ) )
  79     {
  80        /* XXX: add only file without any problem here and with strong detection.
  81         *  - no .mp3, .a52, ... (aac is added as it works only by file ext
  82         *     anyway
  83         *  - wav can't be added 'cause of a52 and dts in them as raw audio
  84          */
  85          static const struct { char ext[5]; char demux[9]; } exttodemux[] =
  86          {
  87             { "aac",  "aac" },
  88             { "aiff", "aiff" },
  89             { "asf",  "asf" }, { "wmv",  "asf" }, { "wma",  "asf" },
  90             { "avi",  "avi" },
  91             { "au",   "au" },
  92             { "flac", "flac" },
  93             { "dv",   "dv" },
  94             { "m3u",  "playlist" },
  95             { "mkv",  "mkv" }, { "mka",  "mkv" }, { "mks",  "mkv" },
  96             { "mp4",  "mp4" }, { "m4a",  "mp4" }, { "mov",  "mp4" }, { "moov", "mp4" },
  97             { "mod",  "mod" }, { "xm",   "mod" },
  98             { "nsv",  "nsv" },
  99             { "ogg",  "ogg" }, { "ogm",  "ogg" },
 100             { "pva",  "pva" },
 101             { "rm",   "rm" },
 102             { "m4v",  "m4v" },
 103             { "h264",  "h264" },
 104             { "",  "" },
 105         };
 106         /* Here, we don't mind if it does not work, it must be quick */
 107         static const struct { char ext[4]; char demux[5]; } exttodemux_quick[] =
 108         {
 109             { "mp3", "mpga" },
 110             { "ogg", "ogg" },
 111             { "wma", "asf" },
 112             { "", "" }
 113         };
 114
 115         const char *psz_ext = strrchr( p_demux->psz_path, '.' ) + 1;
 116         int  i;
 117
 118         if( !b_quick )
 119         {
 120             for( i = 0; exttodemux[i].ext[0]; i++ )
 121             {
 122                 if( !strcasecmp( psz_ext, exttodemux[i].ext ) )
 123                 {
 124                     psz_module = exttodemux[i].demux;
 125                     break;
 126                 }
 127             }
 128         }
 129         else
 130         {
 131             for( i = 0; exttodemux_quick[i].ext[0]; i++ )
 132             {
 133                 if( !strcasecmp( psz_ext, exttodemux_quick[i].ext ) )
 134                 {
 135                     psz_module = exttodemux_quick[i].demux;
 136                     break;
 137                 }
 138             }
 139
 140         }
 141     }
 142
 143     /* Before module_Need (for var_Create...) */
 144     vlc_object_attach( p_demux, p_obj );
 145
 146     if( s )
 147     {
 148         /* ID3/APE tags will mess-up demuxer probing so we skip it here.
 149          * ID3/APE parsers will called later on in the demuxer to access the
 150          * skipped info. */
 151         if( !SkipID3Tag( p_demux ) )
 152             SkipAPETag( p_demux );
 153
 154         p_demux->p_module =
 155             module_Need( p_demux, "demux2", psz_module,
 156                          !strcmp( psz_module, p_demux->psz_demux ) ?
 157                          VLC_TRUE : VLC_FALSE );
 158     }
 159     else
 160     {
 161         p_demux->p_module =
 162             module_Need( p_demux, "access_demux", psz_module,
 163                          !strcmp( psz_module, p_demux->psz_access ) ?
 164                          VLC_TRUE : VLC_FALSE );
 165     }
 166
 167     if( p_demux->p_module == NULL )
 168     {
 169         vlc_object_detach( p_demux );
 170         free( p_demux->psz_path );
 171         free( p_demux->psz_demux );
 172         free( p_demux->psz_access );
 173         vlc_object_destroy( p_demux );
 174         return NULL;
 175     }
 176
 177     return p_demux;
 178 }
 179
 180 /*****************************************************************************
 181  * demux2_Delete:
 182  *****************************************************************************/
 183 void demux2_Delete( demux_t *p_demux )
 184 {
 185     module_Unneed( p_demux, p_demux->p_module );
 186     vlc_object_detach( p_demux );
 187
 188     free( p_demux->psz_path );
 189     free( p_demux->psz_demux );
 190     free( p_demux->psz_access );
 191
 192     vlc_object_destroy( p_demux );
 193 }
 194
 195 /*****************************************************************************
 196  * demux2_vaControlHelper:
 197  *****************************************************************************/
 198 int demux2_vaControlHelper( stream_t *s,
 199                             int64_t i_start, int64_t i_end,
 200                             int i_bitrate, int i_align,
 201                             int i_query, va_list args )
 202 {
 203     int64_t i_tell;
 204     double  f, *pf;
 205     int64_t i64, *pi64;
 206
 207     if( i_end < 0 )    i_end   = stream_Size( s );
 208     if( i_start < 0 )  i_start = 0;
 209     if( i_align <= 0 ) i_align = 1;
 210     i_tell = stream_Tell( s );
 211
 212     switch( i_query )
 213     {
 214         case DEMUX_GET_LENGTH:
 215             pi64 = (int64_t*)va_arg( args, int64_t * );
 216             if( i_bitrate > 0 && i_end > i_start )
 217             {
 218                 *pi64 = I64C(8000000) * (i_end - i_start) / i_bitrate;
 219                 return VLC_SUCCESS;
 220             }
 221             return VLC_EGENERIC;
 222
 223         case DEMUX_GET_TIME:
 224             pi64 = (int64_t*)va_arg( args, int64_t * );
 225             if( i_bitrate > 0 && i_end > i_start )
 226             {
 227                 *pi64 = I64C(8000000) * (i_tell - i_start) / i_bitrate;
 228                 return VLC_SUCCESS;
 229             }
 230             return VLC_EGENERIC;
 231
 232         case DEMUX_GET_POSITION:
 233             pf = (double*)va_arg( args, double * );
 234             if( i_start < i_end )
 235             {
 236                 *pf = (double)( i_tell - i_start ) /
 237                       (double)( i_end  - i_start );
 238                 return VLC_SUCCESS;
 239             }
 240             return VLC_EGENERIC;
 241
 242
 243         case DEMUX_SET_POSITION:
 244             f = (double)va_arg( args, double );
 245             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
 246             {
 247                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
 248
 249                 if( stream_Seek( s, i_start + i_block * i_align ) )
 250                 {
 251                     return VLC_EGENERIC;
 252                 }
 253                 return VLC_SUCCESS;
 254             }
 255             return VLC_EGENERIC;
 256
 257         case DEMUX_SET_TIME:
 258             i64 = (int64_t)va_arg( args, int64_t );
 259             if( i_bitrate > 0 && i64 >= 0 )
 260             {
 261                 int64_t i_block = i64 * i_bitrate / I64C(8000000) / i_align;
 262                 if( stream_Seek( s, i_start + i_block * i_align ) )
 263                 {
 264                     return VLC_EGENERIC;
 265                 }
 266                 return VLC_SUCCESS;
 267             }
 268             return VLC_EGENERIC;
 269
 270         case DEMUX_GET_FPS:
 271         case DEMUX_GET_META:
 272         case DEMUX_HAS_UNSUPPORTED_META:
 273         case DEMUX_SET_NEXT_DEMUX_TIME:
 274         case DEMUX_GET_TITLE_INFO:
 275         case DEMUX_SET_GROUP:
 276         case DEMUX_GET_ATTACHMENTS:
 277             return VLC_EGENERIC;
 278
 279         default:
 280             msg_Err( s, "unknown query in demux_vaControlDefault" );
 281             return VLC_EGENERIC;
 282     }
 283 }
 284
 285 /****************************************************************************
 286  * stream_Demux*: create a demuxer for an outpout stream (allow demuxer chain)
 287  ****************************************************************************/
 288 typedef struct
 289 {
 290     /* Data buffer */
 291     block_fifo_t *p_fifo;
 292     block_t      *p_block;
 293
 294     int64_t     i_pos;
 295
 296     /* Demuxer */
 297     char        *psz_name;
 298     es_out_t    *out;
 299     demux_t     *p_demux;
 300
 301 } d_stream_sys_t;
 302
 303 static int DStreamRead   ( stream_t *, void *p_read, int i_read );
 304 static int DStreamPeek   ( stream_t *, const uint8_t **pp_peek, int i_peek );
 305 static int DStreamControl( stream_t *, int i_query, va_list );
 306 static int DStreamThread ( stream_t * );
 307
 308
 309 stream_t *__stream_DemuxNew( vlc_object_t *p_obj, const char *psz_demux,
 310                              es_out_t *out )
 311 {
 312     /* We create a stream reader, and launch a thread */
 313     stream_t       *s;
 314     d_stream_sys_t *p_sys;
 315
 316     if( psz_demux == NULL || *psz_demux == '\0' ) return NULL;
 317
 318     s = vlc_stream_create( p_obj );
 319     s->pf_read   = DStreamRead;
 320     s->pf_peek   = DStreamPeek;
 321     s->pf_control= DStreamControl;
 322
 323     s->i_char_width = 1;
 324     s->b_little_endian = VLC_FALSE;
 325
 326     s->p_sys = malloc( sizeof( d_stream_sys_t) );
 327     p_sys = (d_stream_sys_t*)s->p_sys;
 328
 329     p_sys->i_pos = 0;
 330     p_sys->out = out;
 331     p_sys->p_demux = NULL;
 332     p_sys->p_block = NULL;
 333     p_sys->psz_name = strdup( psz_demux );
 334
 335     /* decoder fifo */
 336     if( ( p_sys->p_fifo = block_FifoNew( s ) ) == NULL )
 337     {
 338         msg_Err( s, "out of memory" );
 339         vlc_object_destroy( s );
 340         free( p_sys );
 341         return NULL;
 342     }
 343
 344     if( vlc_thread_create( s, "stream out", DStreamThread,
 345                            VLC_THREAD_PRIORITY_INPUT, VLC_FALSE ) )
 346     {
 347         vlc_object_destroy( s );
 348         free( p_sys );
 349         return NULL;
 350     }
 351
 352     return s;
 353 }
 354
 355 void stream_DemuxSend( stream_t *s, block_t *p_block )
 356 {
 357     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 358     if( p_block ) block_FifoPut( p_sys->p_fifo, p_block );
 359 }
 360
 361 void stream_DemuxDelete( stream_t *s )
 362 {
 363     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 364     block_t *p_empty;
 365
 366     vlc_object_kill( s );
 367     if( p_sys->p_demux )
 368         vlc_object_kill( p_sys->p_demux );
 369     p_empty = block_New( s, 1 ); p_empty->i_buffer = 0;
 370     block_FifoPut( p_sys->p_fifo, p_empty );
 371     vlc_thread_join( s );
 372
 373     if( p_sys->p_demux ) demux2_Delete( p_sys->p_demux );
 374     if( p_sys->p_block ) block_Release( p_sys->p_block );
 375
 376     block_FifoRelease( p_sys->p_fifo );
 377     free( p_sys->psz_name );
 378     free( p_sys );
 379
 380     vlc_object_destroy( s );
 381 }
 382
 383
 384 static int DStreamRead( stream_t *s, void *p_read, int i_read )
 385 {
 386     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 387     uint8_t *p_out = p_read;
 388     int i_out = 0;
 389
 390     //msg_Dbg( s, "DStreamRead: wanted %d bytes", i_read );
 391
 392     while( !s->b_die && !s->b_error && i_read )
 393     {
 394         block_t *p_block = p_sys->p_block;
 395         int i_copy;
 396
 397         if( !p_block )
 398         {
 399             p_block = block_FifoGet( p_sys->p_fifo );
 400             if( !p_block ) s->b_error = 1;
 401             p_sys->p_block = p_block;
 402         }
 403
 404         if( p_block && i_read )
 405         {
 406             i_copy = __MIN( i_read, p_block->i_buffer );
 407             if( p_out && i_copy ) memcpy( p_out, p_block->p_buffer, i_copy );
 408             i_read -= i_copy;
 409             i_out += i_copy;
 410             p_block->i_buffer -= i_copy;
 411             p_block->p_buffer += i_copy;
 412
 413             if( !p_block->i_buffer )
 414             {
 415                 block_Release( p_block );
 416                 p_sys->p_block = NULL;
 417             }
 418         }
 419     }
 420
 421     p_sys->i_pos += i_out;
 422     return i_out;
 423 }
 424
 425 static int DStreamPeek( stream_t *s, const uint8_t **pp_peek, int i_peek )
 426 {
 427     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 428     block_t **pp_block = &p_sys->p_block;
 429     int i_out = 0;
 430     *pp_peek = 0;
 431
 432     //msg_Dbg( s, "DStreamPeek: wanted %d bytes", i_peek );
 433
 434     while( !s->b_die && !s->b_error && i_peek )
 435     {
 436         int i_copy;
 437
 438         if( !*pp_block )
 439         {
 440             *pp_block = block_FifoGet( p_sys->p_fifo );
 441             if( !*pp_block ) s->b_error = 1;
 442         }
 443
 444         if( *pp_block && i_peek )
 445         {
 446             i_copy = __MIN( i_peek, (*pp_block)->i_buffer );
 447             i_peek -= i_copy;
 448             i_out += i_copy;
 449
 450             if( i_peek ) pp_block = &(*pp_block)->p_next;
 451         }
 452     }
 453
 454     if( p_sys->p_block )
 455     {
 456         p_sys->p_block = block_ChainGather( p_sys->p_block );
 457         *pp_peek = p_sys->p_block->p_buffer;
 458     }
 459
 460     return i_out;
 461 }
 462
 463 static int DStreamControl( stream_t *s, int i_query, va_list args )
 464 {
 465     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 466     int64_t    *p_i64;
 467     vlc_bool_t *p_b;
 468     int        *p_int;
 469
 470     switch( i_query )
 471     {
 472         case STREAM_GET_SIZE:
 473             p_i64 = (int64_t*) va_arg( args, int64_t * );
 474             *p_i64 = 0;
 475             return VLC_SUCCESS;
 476
 477         case STREAM_CAN_SEEK:
 478             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 479             *p_b = VLC_FALSE;
 480             return VLC_SUCCESS;
 481
 482         case STREAM_CAN_FASTSEEK:
 483             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 484             *p_b = VLC_FALSE;
 485             return VLC_SUCCESS;
 486
 487         case STREAM_GET_POSITION:
 488             p_i64 = (int64_t*) va_arg( args, int64_t * );
 489             *p_i64 = p_sys->i_pos;
 490             return VLC_SUCCESS;
 491
 492         case STREAM_SET_POSITION:
 493         {
 494             int64_t i64 = (int64_t)va_arg( args, int64_t );
 495             int i_skip;
 496             if( i64 < p_sys->i_pos ) return VLC_EGENERIC;
 497             i_skip = i64 - p_sys->i_pos;
 498
 499             while( i_skip > 0 )
 500             {
 501                 int i_read = DStreamRead( s, NULL, i_skip );
 502                 if( i_read <= 0 ) return VLC_EGENERIC;
 503                 i_skip -= i_read;
 504             }
 505             return VLC_SUCCESS;
 506         }
 507
 508         case STREAM_GET_MTU:
 509             p_int = (int*) va_arg( args, int * );
 510             *p_int = 0;
 511             return VLC_SUCCESS;
 512
 513         case STREAM_CONTROL_ACCESS:
 514         case STREAM_GET_CONTENT_TYPE:
 515             return VLC_EGENERIC;
 516
 517         default:
 518             msg_Err( s, "invalid DStreamControl query=0x%x", i_query );
 519             return VLC_EGENERIC;
 520     }
 521 }
 522
 523 static int DStreamThread( stream_t *s )
 524 {
 525     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 526     demux_t *p_demux;
 527
 528     /* Create the demuxer */
 529     if( !(p_demux = demux2_New( s, "", p_sys->psz_name, "", s, p_sys->out,
 530                                VLC_FALSE )) )
 531     {
 532         return VLC_EGENERIC;
 533     }
 534
 535     p_sys->p_demux = p_demux;
 536
 537     /* Main loop */
 538     while( !s->b_die && !p_demux->b_die )
 539     {
 540         if( p_demux->pf_demux( p_demux ) <= 0 ) break;
 541     }
 542
 543     vlc_object_kill( p_demux );
 544     return VLC_SUCCESS;
 545 }
 546
 547 /****************************************************************************
 548  * Utility functions
 549  ****************************************************************************/
 550 static vlc_bool_t SkipID3Tag( demux_t *p_demux )
 551 {
 552     const uint8_t *p_peek;
 553     uint8_t version, revision;
 554     int i_size;
 555     int b_footer;
 556
 557     if( !p_demux->s )
 558         return VLC_FALSE;
 559
 560     /* Get 10 byte id3 header */
 561     if( stream_Peek( p_demux->s, &p_peek, 10 ) < 10 )
 562         return VLC_FALSE;
 563
 564     if( memcmp( p_peek, "ID3", 3 ) )
 565         return VLC_FALSE;
 566
 567     version = p_peek[3];
 568     revision = p_peek[4];
 569     b_footer = p_peek[5] & 0x10;
 570     i_size = (p_peek[6]<<21) + (p_peek[7]<<14) + (p_peek[8]<<7) + p_peek[9];
 571
 572     if( b_footer ) i_size += 10;
 573     i_size += 10;
 574
 575     /* Skip the entire tag */
 576     stream_Read( p_demux->s, NULL, i_size );
 577
 578     msg_Dbg( p_demux, "ID3v2.%d revision %d tag found, skipping %d bytes",
 579              version, revision, i_size );
 580     return VLC_TRUE;
 581 }
 582 static vlc_bool_t SkipAPETag( demux_t *p_demux )
 583 {
 584     const uint8_t *p_peek;
 585     int i_version;
 586     int i_size;
 587     uint32_t flags;
 588
 589     if( !p_demux->s )
 590         return VLC_FALSE;
 591
 592     /* Get 32 byte ape header */
 593     if( stream_Peek( p_demux->s, &p_peek, 32 ) < 32 )
 594         return VLC_FALSE;
 595
 596     if( memcmp( p_peek, "APETAGEX", 8 ) )
 597         return VLC_FALSE;
 598
 599     i_version = GetDWLE( &p_peek[8] );
 600     flags = GetDWLE( &p_peek[8+4+4] );
 601     if( ( i_version != 1000 && i_version != 2000 ) || !( flags & (1<<29) ) )
 602         return VLC_FALSE;
 603
 604     i_size = GetDWLE( &p_peek[8+4] ) + ( (flags&(1<<30)) ? 32 : 0 );
 605
 606     /* Skip the entire tag */
 607     stream_Read( p_demux->s, NULL, i_size );
 608
 609     msg_Dbg( p_demux, "AP2 v%d tag found, skipping %d bytes",
 610              i_version/1000, i_size );
 611     return VLC_TRUE;
 612 }
 613