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 <stdlib.h>
  25 #include <vlc/vlc.h>
  26
  27 #include "input_internal.h"
  28
  29 static void SkipID3Tag( demux_t * );
  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_GetString( p_obj, "demux" );
  55     }
  56
  57     if( !b_quick )
  58     {
  59         msg_Dbg( p_obj, "creating demux: access='%s' demux='%s' path='%s'",
  60                  p_demux->psz_access, p_demux->psz_demux, p_demux->psz_path );
  61     }
  62
  63     p_demux->s          = s;
  64     p_demux->out        = out;
  65
  66     p_demux->pf_demux   = NULL;
  67     p_demux->pf_control = NULL;
  68     p_demux->p_sys      = NULL;
  69     p_demux->info.i_update = 0;
  70     p_demux->info.i_title  = 0;
  71     p_demux->info.i_seekpoint = 0;
  72
  73     if( s ) psz_module = p_demux->psz_demux;
  74     else psz_module = p_demux->psz_access;
  75
  76     if( s && *psz_module == '\0' && strrchr( p_demux->psz_path, '.' ) )
  77     {
  78        /* XXX: add only file without any problem here and with strong detection.
  79         *  - no .mp3, .a52, ... (aac is added as it works only by file ext
  80         *     anyway
  81         *  - wav can't be added 'cause of a52 and dts in them as raw audio
  82          */
  83          static const struct { char ext[5]; char demux[9]; } exttodemux[] =
  84          {
  85             { "aac",  "aac" },
  86             { "aiff", "aiff" },
  87             { "asf",  "asf" }, { "wmv",  "asf" }, { "wma",  "asf" },
  88             { "avi",  "avi" },
  89             { "au",   "au" },
  90             { "flac", "flac" },
  91             { "dv",   "dv" },
  92             { "m3u",  "playlist" },
  93             { "mkv",  "mkv" }, { "mka",  "mkv" }, { "mks",  "mkv" },
  94             { "mp4",  "mp4" }, { "m4a",  "mp4" }, { "mov",  "mp4" }, { "moov", "mp4" },
  95             { "mod",  "mod" }, { "xm",   "mod" },
  96             { "nsv",  "nsv" },
  97             { "ogg",  "ogg" }, { "ogm",  "ogg" },
  98             { "pva",  "pva" },
  99             { "rm",   "rm" },
 100             { "m4v",  "m4v" },
 101             { "h264",  "h264" },
 102             { "",  "" },
 103         };
 104         /* Here, we don't mind if it does not work, it must be quick */
 105         static const struct { char ext[4]; char demux[5]; } exttodemux_quick[] =
 106         {
 107             { "mp3", "mpga" },
 108             { "ogg", "ogg" },
 109             { "wma", "asf" },
 110             { "", "" }
 111         };
 112
 113         const char *psz_ext = strrchr( p_demux->psz_path, '.' ) + 1;
 114         int  i;
 115
 116         if( !b_quick )
 117         {
 118             for( i = 0; exttodemux[i].ext[0]; i++ )
 119             {
 120                 if( !strcasecmp( psz_ext, exttodemux[i].ext ) )
 121                 {
 122                     psz_module = exttodemux[i].demux;
 123                     break;
 124                 }
 125             }
 126         }
 127         else
 128         {
 129             for( i = 0; exttodemux_quick[i].ext[0]; i++ )
 130             {
 131                 if( !strcasecmp( psz_ext, exttodemux_quick[i].ext ) )
 132                 {
 133                     psz_module = exttodemux_quick[i].demux;
 134                     break;
 135                 }
 136             }
 137
 138         }
 139     }
 140
 141     /* Before module_Need (for var_Create...) */
 142     vlc_object_attach( p_demux, p_obj );
 143
 144     if( s )
 145     {
 146         /* ID3 tags will mess-up demuxer probing so we skip it here.
 147          * ID3 parsers will called later on in the demuxer to access the
 148          * skipped info. */
 149         SkipID3Tag( p_demux );
 150
 151         p_demux->p_module =
 152             module_Need( p_demux, "demux2", psz_module,
 153                          !strcmp( psz_module, p_demux->psz_demux ) ?
 154                          VLC_TRUE : VLC_FALSE );
 155     }
 156     else
 157     {
 158         p_demux->p_module =
 159             module_Need( p_demux, "access_demux", psz_module,
 160                          !strcmp( psz_module, p_demux->psz_access ) ?
 161                          VLC_TRUE : VLC_FALSE );
 162     }
 163
 164     if( p_demux->p_module == NULL )
 165     {
 166         vlc_object_detach( p_demux );
 167         free( p_demux->psz_path );
 168         free( p_demux->psz_demux );
 169         free( p_demux->psz_access );
 170         vlc_object_destroy( p_demux );
 171         return NULL;
 172     }
 173
 174     return p_demux;
 175 }
 176
 177 /*****************************************************************************
 178  * demux2_Delete:
 179  *****************************************************************************/
 180 void demux2_Delete( demux_t *p_demux )
 181 {
 182     module_Unneed( p_demux, p_demux->p_module );
 183     vlc_object_detach( p_demux );
 184
 185     free( p_demux->psz_path );
 186     free( p_demux->psz_demux );
 187     free( p_demux->psz_access );
 188
 189     vlc_object_destroy( p_demux );
 190 }
 191
 192 /*****************************************************************************
 193  * demux2_vaControlHelper:
 194  *****************************************************************************/
 195 int demux2_vaControlHelper( stream_t *s,
 196                             int64_t i_start, int64_t i_end,
 197                             int i_bitrate, int i_align,
 198                             int i_query, va_list args )
 199 {
 200     int64_t i_tell;
 201     double  f, *pf;
 202     int64_t i64, *pi64;
 203
 204     if( i_end < 0 )    i_end   = stream_Size( s );
 205     if( i_start < 0 )  i_start = 0;
 206     if( i_align <= 0 ) i_align = 1;
 207     i_tell = stream_Tell( s );
 208
 209     switch( i_query )
 210     {
 211         case DEMUX_GET_LENGTH:
 212             pi64 = (int64_t*)va_arg( args, int64_t * );
 213             if( i_bitrate > 0 && i_end > i_start )
 214             {
 215                 *pi64 = I64C(8000000) * (i_end - i_start) / i_bitrate;
 216                 return VLC_SUCCESS;
 217             }
 218             return VLC_EGENERIC;
 219
 220         case DEMUX_GET_TIME:
 221             pi64 = (int64_t*)va_arg( args, int64_t * );
 222             if( i_bitrate > 0 && i_end > i_start )
 223             {
 224                 *pi64 = I64C(8000000) * (i_tell - i_start) / i_bitrate;
 225                 return VLC_SUCCESS;
 226             }
 227             return VLC_EGENERIC;
 228
 229         case DEMUX_GET_POSITION:
 230             pf = (double*)va_arg( args, double * );
 231             if( i_start < i_end )
 232             {
 233                 *pf = (double)( i_tell - i_start ) /
 234                       (double)( i_end  - i_start );
 235                 return VLC_SUCCESS;
 236             }
 237             return VLC_EGENERIC;
 238
 239
 240         case DEMUX_SET_POSITION:
 241             f = (double)va_arg( args, double );
 242             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
 243             {
 244                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
 245
 246                 if( stream_Seek( s, i_start + i_block * i_align ) )
 247                 {
 248                     return VLC_EGENERIC;
 249                 }
 250                 return VLC_SUCCESS;
 251             }
 252             return VLC_EGENERIC;
 253
 254         case DEMUX_SET_TIME:
 255             i64 = (int64_t)va_arg( args, int64_t );
 256             if( i_bitrate > 0 && i64 >= 0 )
 257             {
 258                 int64_t i_block = i64 * i_bitrate / I64C(8000000) / i_align;
 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_GET_FPS:
 268         case DEMUX_GET_META:
 269         case DEMUX_SET_NEXT_DEMUX_TIME:
 270         case DEMUX_GET_TITLE_INFO:
 271         case DEMUX_SET_GROUP:
 272             return VLC_EGENERIC;
 273
 274         default:
 275             msg_Err( s, "unknown query in demux_vaControlDefault" );
 276             return VLC_EGENERIC;
 277     }
 278 }
 279
 280 /****************************************************************************
 281  * stream_Demux*: create a demuxer for an outpout stream (allow demuxer chain)
 282  ****************************************************************************/
 283 typedef struct
 284 {
 285     /* Data buffer */
 286     block_fifo_t *p_fifo;
 287     block_t      *p_block;
 288
 289     int64_t     i_pos;
 290
 291     /* Demuxer */
 292     char        *psz_name;
 293     es_out_t    *out;
 294     demux_t     *p_demux;
 295
 296 } d_stream_sys_t;
 297
 298 static int DStreamRead   ( stream_t *, void *p_read, int i_read );
 299 static int DStreamPeek   ( stream_t *, uint8_t **pp_peek, int i_peek );
 300 static int DStreamControl( stream_t *, int i_query, va_list );
 301 static int DStreamThread ( stream_t * );
 302
 303
 304 stream_t *__stream_DemuxNew( vlc_object_t *p_obj, const char *psz_demux,
 305                              es_out_t *out )
 306 {
 307     /* We create a stream reader, and launch a thread */
 308     stream_t       *s;
 309     d_stream_sys_t *p_sys;
 310
 311     if( psz_demux == NULL || *psz_demux == '\0' ) return NULL;
 312
 313     s = vlc_stream_create( p_obj );
 314     s->pf_block  = NULL;
 315     s->pf_read   = DStreamRead;
 316     s->pf_peek   = DStreamPeek;
 317     s->pf_control= DStreamControl;
 318
 319     s->i_char_width = 1;
 320     s->b_little_endian = VLC_FALSE;
 321
 322     s->p_sys = malloc( sizeof( d_stream_sys_t) );
 323     p_sys = (d_stream_sys_t*)s->p_sys;
 324
 325     p_sys->i_pos = 0;
 326     p_sys->out = out;
 327     p_sys->p_demux = NULL;
 328     p_sys->p_block = NULL;
 329     p_sys->psz_name = strdup( psz_demux );
 330
 331     /* decoder fifo */
 332     if( ( p_sys->p_fifo = block_FifoNew( s ) ) == NULL )
 333     {
 334         msg_Err( s, "out of memory" );
 335         vlc_object_destroy( s );
 336         free( p_sys );
 337         return NULL;
 338     }
 339
 340     if( vlc_thread_create( s, "stream out", DStreamThread,
 341                            VLC_THREAD_PRIORITY_INPUT, VLC_FALSE ) )
 342     {
 343         vlc_object_destroy( s );
 344         free( p_sys );
 345         return NULL;
 346     }
 347
 348     return s;
 349 }
 350
 351 void stream_DemuxSend( stream_t *s, block_t *p_block )
 352 {
 353     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 354     if( p_block ) block_FifoPut( p_sys->p_fifo, p_block );
 355 }
 356
 357 void stream_DemuxDelete( stream_t *s )
 358 {
 359     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 360     block_t *p_empty;
 361
 362     vlc_object_kill( s );
 363     if( p_sys->p_demux )
 364         vlc_object_kill( p_sys->p_demux );
 365     p_empty = block_New( s, 1 ); p_empty->i_buffer = 0;
 366     block_FifoPut( p_sys->p_fifo, p_empty );
 367     vlc_thread_join( s );
 368
 369     if( p_sys->p_demux ) demux2_Delete( p_sys->p_demux );
 370     if( p_sys->p_block ) block_Release( p_sys->p_block );
 371
 372     block_FifoRelease( p_sys->p_fifo );
 373     free( p_sys->psz_name );
 374     free( p_sys );
 375
 376     vlc_object_destroy( s );
 377 }
 378
 379
 380 static int DStreamRead( stream_t *s, void *p_read, int i_read )
 381 {
 382     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 383     uint8_t *p_out = p_read;
 384     int i_out = 0;
 385
 386     //msg_Dbg( s, "DStreamRead: wanted %d bytes", i_read );
 387
 388     while( !s->b_die && !s->b_error && i_read )
 389     {
 390         block_t *p_block = p_sys->p_block;
 391         int i_copy;
 392
 393         if( !p_block )
 394         {
 395             p_block = block_FifoGet( p_sys->p_fifo );
 396             if( !p_block ) s->b_error = 1;
 397             p_sys->p_block = p_block;
 398         }
 399
 400         if( p_block && i_read )
 401         {
 402             i_copy = __MIN( i_read, p_block->i_buffer );
 403             if( p_out && i_copy ) memcpy( p_out, p_block->p_buffer, i_copy );
 404             i_read -= i_copy;
 405             i_out += i_copy;
 406             p_block->i_buffer -= i_copy;
 407             p_block->p_buffer += i_copy;
 408
 409             if( !p_block->i_buffer )
 410             {
 411                 block_Release( p_block );
 412                 p_sys->p_block = NULL;
 413             }
 414         }
 415     }
 416
 417     p_sys->i_pos += i_out;
 418     return i_out;
 419 }
 420
 421 static int DStreamPeek( stream_t *s, uint8_t **pp_peek, int i_peek )
 422 {
 423     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 424     block_t **pp_block = &p_sys->p_block;
 425     int i_out = 0;
 426     *pp_peek = 0;
 427
 428     //msg_Dbg( s, "DStreamPeek: wanted %d bytes", i_peek );
 429
 430     while( !s->b_die && !s->b_error && i_peek )
 431     {
 432         int i_copy;
 433
 434         if( !*pp_block )
 435         {
 436             *pp_block = block_FifoGet( p_sys->p_fifo );
 437             if( !*pp_block ) s->b_error = 1;
 438         }
 439
 440         if( *pp_block && i_peek )
 441         {
 442             i_copy = __MIN( i_peek, (*pp_block)->i_buffer );
 443             i_peek -= i_copy;
 444             i_out += i_copy;
 445
 446             if( i_peek ) pp_block = &(*pp_block)->p_next;
 447         }
 448     }
 449
 450     if( p_sys->p_block )
 451     {
 452         p_sys->p_block = block_ChainGather( p_sys->p_block );
 453         *pp_peek = p_sys->p_block->p_buffer;
 454     }
 455
 456     return i_out;
 457 }
 458
 459 static int DStreamControl( stream_t *s, int i_query, va_list args )
 460 {
 461     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 462     int64_t    *p_i64;
 463     vlc_bool_t *p_b;
 464     int        *p_int;
 465
 466     switch( i_query )
 467     {
 468         case STREAM_GET_SIZE:
 469             p_i64 = (int64_t*) va_arg( args, int64_t * );
 470             *p_i64 = 0;
 471             return VLC_SUCCESS;
 472
 473         case STREAM_CAN_SEEK:
 474             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 475             *p_b = VLC_FALSE;
 476             return VLC_SUCCESS;
 477
 478         case STREAM_CAN_FASTSEEK:
 479             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 480             *p_b = VLC_FALSE;
 481             return VLC_SUCCESS;
 482
 483         case STREAM_GET_POSITION:
 484             p_i64 = (int64_t*) va_arg( args, int64_t * );
 485             *p_i64 = p_sys->i_pos;
 486             return VLC_SUCCESS;
 487
 488         case STREAM_SET_POSITION:
 489         {
 490             int64_t i64 = (int64_t)va_arg( args, int64_t );
 491             int i_skip;
 492             if( i64 < p_sys->i_pos ) return VLC_EGENERIC;
 493             i_skip = i64 - p_sys->i_pos;
 494
 495             while( i_skip > 0 )
 496             {
 497                 int i_read = DStreamRead( s, NULL, i_skip );
 498                 if( i_read <= 0 ) return VLC_EGENERIC;
 499                 i_skip -= i_read;
 500             }
 501             return VLC_SUCCESS;
 502         }
 503
 504         case STREAM_GET_MTU:
 505             p_int = (int*) va_arg( args, int * );
 506             *p_int = 0;
 507             return VLC_SUCCESS;
 508
 509         case STREAM_CONTROL_ACCESS:
 510             return VLC_EGENERIC;
 511
 512         default:
 513             msg_Err( s, "invalid DStreamControl query=0x%x", i_query );
 514             return VLC_EGENERIC;
 515     }
 516 }
 517
 518 static int DStreamThread( stream_t *s )
 519 {
 520     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 521     demux_t *p_demux;
 522
 523     /* Create the demuxer */
 524     if( !(p_demux = demux2_New( s, "", p_sys->psz_name, "", s, p_sys->out,
 525                                VLC_FALSE )) )
 526     {
 527         return VLC_EGENERIC;
 528     }
 529
 530     p_sys->p_demux = p_demux;
 531
 532     /* Main loop */
 533     while( !s->b_die && !p_demux->b_die )
 534     {
 535         if( p_demux->pf_demux( p_demux ) <= 0 ) break;
 536     }
 537
 538     vlc_object_kill( p_demux );
 539     return VLC_SUCCESS;
 540 }
 541
 542 /****************************************************************************
 543  * Utility functions
 544  ****************************************************************************/
 545 static void SkipID3Tag( demux_t *p_demux )
 546 {
 547     uint8_t *p_peek;
 548     uint8_t version, revision;
 549     int i_size;
 550     int b_footer;
 551
 552     if( !p_demux->s ) return;
 553
 554     /* Get 10 byte id3 header */
 555     if( stream_Peek( p_demux->s, &p_peek, 10 ) < 10 ) return;
 556
 557     if( p_peek[0] != 'I' || p_peek[1] != 'D' || p_peek[2] != '3' ) return;
 558
 559     version = p_peek[3];
 560     revision = p_peek[4];
 561     b_footer = p_peek[5] & 0x10;
 562     i_size = (p_peek[6]<<21) + (p_peek[7]<<14) + (p_peek[8]<<7) + p_peek[9];
 563
 564     if( b_footer ) i_size += 10;
 565     i_size += 10;
 566
 567     /* Skip the entire tag */
 568     stream_Read( p_demux->s, NULL, i_size );
 569
 570     msg_Dbg( p_demux, "ID3v2.%d revision %d tag found, skipping %d bytes",
 571              version, revision, i_size );
 572
 573     return;
 574 }