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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 #include <stdlib.h>
  25 #include <vlc/vlc.h>
  26 #include <vlc/input.h>
  27
  28 #include "input_internal.h"
  29
  30 static void SkipID3Tag( demux_t * );
  31
  32 /*****************************************************************************
  33  * demux2_New:
  34  *  if s is NULL then load a access_demux
  35  *****************************************************************************/
  36 demux_t *__demux2_New( vlc_object_t *p_obj,
  37                        char *psz_access, char *psz_demux, 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     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 anyway
  80          *  - wav can't be added 'cause of a52 and dts in them as raw audio
  81          */
  82          static struct { char *ext; char *demux; } exttodemux[] =
  83          {
  84             { "aac",  "aac" },
  85             { "aiff", "aiff" },
  86             { "asf",  "asf" }, { "wmv",  "asf" }, { "wma",  "asf" },
  87             { "avi",  "avi" },
  88             { "au",   "au" },
  89             { "flac", "flac" },
  90             { "dv",   "dv" },
  91             { "m3u",  "playlist" },
  92             { "mkv",  "mkv" }, { "mka",  "mkv" }, { "mks",  "mkv" },
  93             { "mp4",  "mp4" }, { "m4a",  "mp4" }, { "mov",  "mp4" }, { "moov", "mp4" },
  94             { "mod",  "mod" }, { "xm",   "mod" },
  95             { "nsv",  "nsv" },
  96             { "ogg",  "ogg" }, { "ogm",  "ogg" },
  97             { "pva",  "pva" },
  98             { "rm",   "rm" },
  99             { NULL,  NULL },
 100         };
 101         /* Here, we don't mind if it does not work, it must be quick */
 102         static struct { char *ext; char *demux; } exttodemux_quick[] =
 103         {
 104             { "mp3", "mpga" },
 105             { "ogg", "ogg" },
 106             { "wma", "asf" },
 107             { NULL, NULL }
 108         };
 109
 110         char *psz_ext = strrchr( p_demux->psz_path, '.' ) + 1;
 111         int  i;
 112
 113         if( !b_quick )
 114         {
 115             for( i = 0; exttodemux[i].ext != NULL; i++ )
 116             {
 117                 if( !strcasecmp( psz_ext, exttodemux[i].ext ) )
 118                 {
 119                     psz_module = exttodemux[i].demux;
 120                     break;
 121                 }
 122             }
 123         }
 124         else
 125         {
 126             for( i = 0; exttodemux_quick[i].ext != NULL; i++ )
 127             {
 128                 if( !strcasecmp( psz_ext, exttodemux_quick[i].ext ) )
 129                 {
 130                     psz_module = exttodemux_quick[i].demux;
 131                     break;
 132                 }
 133             }
 134
 135         }
 136     }
 137
 138     /* Before module_Need (for var_Create...) */
 139     vlc_object_attach( p_demux, p_obj );
 140
 141     if( s )
 142     {
 143         /* ID3 tags will mess-up demuxer probing so we skip it here.
 144          * ID3 parsers will called later on in the demuxer to access the
 145          * skipped info. */
 146         SkipID3Tag( p_demux );
 147
 148         p_demux->p_module =
 149             module_Need( p_demux, "demux2", psz_module,
 150                          !strcmp( psz_module, p_demux->psz_demux ) ?
 151                          VLC_TRUE : VLC_FALSE );
 152     }
 153     else
 154     {
 155         p_demux->p_module =
 156             module_Need( p_demux, "access_demux", psz_module,
 157                          !strcmp( psz_module, p_demux->psz_access ) ?
 158                          VLC_TRUE : VLC_FALSE );
 159     }
 160
 161     if( p_demux->p_module == NULL )
 162     {
 163         vlc_object_detach( p_demux );
 164         free( p_demux->psz_path );
 165         free( p_demux->psz_demux );
 166         free( p_demux->psz_access );
 167         vlc_object_destroy( p_demux );
 168         return NULL;
 169     }
 170
 171     return p_demux;
 172 }
 173
 174 /*****************************************************************************
 175  * demux2_Delete:
 176  *****************************************************************************/
 177 void demux2_Delete( demux_t *p_demux )
 178 {
 179     module_Unneed( p_demux, p_demux->p_module );
 180     vlc_object_detach( p_demux );
 181
 182     free( p_demux->psz_path );
 183     free( p_demux->psz_demux );
 184     free( p_demux->psz_access );
 185
 186     vlc_object_destroy( p_demux );
 187 }
 188
 189 /*****************************************************************************
 190  * demux2_vaControlHelper:
 191  *****************************************************************************/
 192 int demux2_vaControlHelper( stream_t *s,
 193                             int64_t i_start, int64_t i_end,
 194                             int i_bitrate, int i_align,
 195                             int i_query, va_list args )
 196 {
 197     int64_t i_tell;
 198     double  f, *pf;
 199     int64_t i64, *pi64;
 200
 201     if( i_end < 0 )    i_end   = stream_Size( s );
 202     if( i_start < 0 )  i_start = 0;
 203     if( i_align <= 0 ) i_align = 1;
 204     i_tell = stream_Tell( s );
 205
 206     switch( i_query )
 207     {
 208         case DEMUX_GET_LENGTH:
 209             pi64 = (int64_t*)va_arg( args, int64_t * );
 210             if( i_bitrate > 0 && i_end > i_start )
 211             {
 212                 *pi64 = I64C(8000000) * (i_end - i_start) / i_bitrate;
 213                 return VLC_SUCCESS;
 214             }
 215             return VLC_EGENERIC;
 216
 217         case DEMUX_GET_TIME:
 218             pi64 = (int64_t*)va_arg( args, int64_t * );
 219             if( i_bitrate > 0 && i_end > i_start )
 220             {
 221                 *pi64 = I64C(8000000) * (i_tell - i_start) / i_bitrate;
 222                 return VLC_SUCCESS;
 223             }
 224             return VLC_EGENERIC;
 225
 226         case DEMUX_GET_POSITION:
 227             pf = (double*)va_arg( args, double * );
 228             if( i_start < i_end )
 229             {
 230                 *pf = (double)( i_tell - i_start ) /
 231                       (double)( i_end  - i_start );
 232                 return VLC_SUCCESS;
 233             }
 234             return VLC_EGENERIC;
 235
 236
 237         case DEMUX_SET_POSITION:
 238             f = (double)va_arg( args, double );
 239             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
 240             {
 241                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
 242
 243                 if( stream_Seek( s, i_start + i_block * i_align ) )
 244                 {
 245                     return VLC_EGENERIC;
 246                 }
 247                 return VLC_SUCCESS;
 248             }
 249             return VLC_EGENERIC;
 250
 251         case DEMUX_SET_TIME:
 252             i64 = (int64_t)va_arg( args, int64_t );
 253             if( i_bitrate > 0 && i64 >= 0 )
 254             {
 255                 int64_t i_block = i64 * i_bitrate / I64C(8000000) / i_align;
 256                 if( stream_Seek( s, i_start + i_block * i_align ) )
 257                 {
 258                     return VLC_EGENERIC;
 259                 }
 260                 return VLC_SUCCESS;
 261             }
 262             return VLC_EGENERIC;
 263
 264         case DEMUX_GET_FPS:
 265         case DEMUX_GET_META:
 266         case DEMUX_SET_NEXT_DEMUX_TIME:
 267         case DEMUX_GET_TITLE_INFO:
 268         case DEMUX_SET_GROUP:
 269             return VLC_EGENERIC;
 270
 271         default:
 272             msg_Err( s, "unknown query in demux_vaControlDefault" );
 273             return VLC_EGENERIC;
 274     }
 275 }
 276
 277 /****************************************************************************
 278  * stream_Demux*: create a demuxer for an outpout stream (allow demuxer chain)
 279  ****************************************************************************/
 280 typedef struct
 281 {
 282     /* Data buffer */
 283     block_fifo_t *p_fifo;
 284     block_t      *p_block;
 285
 286     int64_t     i_pos;
 287
 288     /* Demuxer */
 289     char        *psz_name;
 290     es_out_t    *out;
 291     demux_t     *p_demux;
 292
 293 } d_stream_sys_t;
 294
 295 static int DStreamRead   ( stream_t *, void *p_read, int i_read );
 296 static int DStreamPeek   ( stream_t *, uint8_t **pp_peek, int i_peek );
 297 static int DStreamControl( stream_t *, int i_query, va_list );
 298 static int DStreamThread ( stream_t * );
 299
 300
 301 stream_t *__stream_DemuxNew( vlc_object_t *p_obj, char *psz_demux,
 302                              es_out_t *out )
 303 {
 304     /* We create a stream reader, and launch a thread */
 305     stream_t       *s;
 306     d_stream_sys_t *p_sys;
 307
 308     if( psz_demux == NULL || *psz_demux == '\0' ) return NULL;
 309
 310     s = vlc_object_create( p_obj, VLC_OBJECT_STREAM );
 311     s->pf_block  = NULL;
 312     s->pf_read   = DStreamRead;
 313     s->pf_peek   = DStreamPeek;
 314     s->pf_control= DStreamControl;
 315
 316     s->i_char_width = 1;
 317     s->b_little_endian = VLC_FALSE;
 318
 319     s->p_sys = malloc( sizeof( d_stream_sys_t) );
 320     p_sys = (d_stream_sys_t*)s->p_sys;
 321
 322     p_sys->i_pos = 0;
 323     p_sys->out = out;
 324     p_sys->p_demux = NULL;
 325     p_sys->p_block = NULL;
 326     p_sys->psz_name = strdup( psz_demux );
 327
 328     /* decoder fifo */
 329     if( ( p_sys->p_fifo = block_FifoNew( s ) ) == NULL )
 330     {
 331         msg_Err( s, "out of memory" );
 332         vlc_object_destroy( s );
 333         free( p_sys );
 334         return NULL;
 335     }
 336
 337     if( vlc_thread_create( s, "stream out", DStreamThread,
 338                            VLC_THREAD_PRIORITY_INPUT, VLC_FALSE ) )
 339     {
 340         vlc_object_destroy( s );
 341         free( p_sys );
 342         return NULL;
 343     }
 344
 345     return s;
 346 }
 347
 348 void stream_DemuxSend( stream_t *s, block_t *p_block )
 349 {
 350     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 351     if( p_block ) block_FifoPut( p_sys->p_fifo, p_block );
 352 }
 353
 354 void stream_DemuxDelete( stream_t *s )
 355 {
 356     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 357     block_t *p_empty;
 358
 359     s->b_die = VLC_TRUE;
 360     if( p_sys->p_demux ) p_sys->p_demux->b_die = VLC_TRUE;
 361     p_empty = block_New( s, 1 ); p_empty->i_buffer = 0;
 362     block_FifoPut( p_sys->p_fifo, p_empty );
 363     vlc_thread_join( s );
 364
 365     if( p_sys->p_demux ) demux2_Delete( p_sys->p_demux );
 366     if( p_sys->p_block ) block_Release( p_sys->p_block );
 367
 368     block_FifoRelease( p_sys->p_fifo );
 369     free( p_sys->psz_name );
 370     free( p_sys );
 371
 372     vlc_object_destroy( s );
 373 }
 374
 375
 376 static int DStreamRead( stream_t *s, void *p_read, int i_read )
 377 {
 378     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 379     uint8_t *p_out = p_read;
 380     int i_out = 0;
 381
 382     //msg_Dbg( s, "DStreamRead: wanted %d bytes", i_read );
 383
 384     while( !s->b_die && !s->b_error && i_read )
 385     {
 386         block_t *p_block = p_sys->p_block;
 387         int i_copy;
 388
 389         if( !p_block )
 390         {
 391             p_block = block_FifoGet( p_sys->p_fifo );
 392             if( !p_block ) s->b_error = 1;
 393             p_sys->p_block = p_block;
 394         }
 395
 396         if( p_block && i_read )
 397         {
 398             i_copy = __MIN( i_read, p_block->i_buffer );
 399             if( p_out && i_copy ) memcpy( p_out, p_block->p_buffer, i_copy );
 400             i_read -= i_copy;
 401             i_out += i_copy;
 402             p_block->i_buffer -= i_copy;
 403             p_block->p_buffer += i_copy;
 404
 405             if( !p_block->i_buffer )
 406             {
 407                 block_Release( p_block );
 408                 p_sys->p_block = NULL;
 409             }
 410         }
 411     }
 412
 413     p_sys->i_pos += i_out;
 414     return i_out;
 415 }
 416
 417 static int DStreamPeek( stream_t *s, uint8_t **pp_peek, int i_peek )
 418 {
 419     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 420     block_t **pp_block = &p_sys->p_block;
 421     int i_out = 0;
 422     *pp_peek = 0;
 423
 424     //msg_Dbg( s, "DStreamPeek: wanted %d bytes", i_peek );
 425
 426     while( !s->b_die && !s->b_error && i_peek )
 427     {
 428         int i_copy;
 429
 430         if( !*pp_block )
 431         {
 432             *pp_block = block_FifoGet( p_sys->p_fifo );
 433             if( !*pp_block ) s->b_error = 1;
 434         }
 435
 436         if( *pp_block && i_peek )
 437         {
 438             i_copy = __MIN( i_peek, (*pp_block)->i_buffer );
 439             i_peek -= i_copy;
 440             i_out += i_copy;
 441
 442             if( i_peek ) pp_block = &(*pp_block)->p_next;
 443         }
 444     }
 445
 446     if( p_sys->p_block )
 447     {
 448         p_sys->p_block = block_ChainGather( p_sys->p_block );
 449         *pp_peek = p_sys->p_block->p_buffer;
 450     }
 451
 452     return i_out;
 453 }
 454
 455 static int DStreamControl( stream_t *s, int i_query, va_list args )
 456 {
 457     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 458     int64_t    *p_i64;
 459     vlc_bool_t *p_b;
 460     int        *p_int;
 461
 462     switch( i_query )
 463     {
 464         case STREAM_GET_SIZE:
 465             p_i64 = (int64_t*) va_arg( args, int64_t * );
 466             *p_i64 = 0;
 467             return VLC_SUCCESS;
 468
 469         case STREAM_CAN_SEEK:
 470             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 471             *p_b = VLC_FALSE;
 472             return VLC_SUCCESS;
 473
 474         case STREAM_CAN_FASTSEEK:
 475             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 476             *p_b = VLC_FALSE;
 477             return VLC_SUCCESS;
 478
 479         case STREAM_GET_POSITION:
 480             p_i64 = (int64_t*) va_arg( args, int64_t * );
 481             *p_i64 = p_sys->i_pos;
 482             return VLC_SUCCESS;
 483
 484         case STREAM_SET_POSITION:
 485         {
 486             int64_t i64 = (int64_t)va_arg( args, int64_t );
 487             int i_skip;
 488             if( i64 < p_sys->i_pos ) return VLC_EGENERIC;
 489             i_skip = i64 - p_sys->i_pos;
 490
 491             while( i_skip > 0 )
 492             {
 493                 int i_read = DStreamRead( s, NULL, i_skip );
 494                 if( i_read <= 0 ) return VLC_EGENERIC;
 495                 i_skip -= i_read;
 496             }
 497             return VLC_SUCCESS;
 498         }
 499
 500         case STREAM_GET_MTU:
 501             p_int = (int*) va_arg( args, int * );
 502             *p_int = 0;
 503             return VLC_SUCCESS;
 504
 505         case STREAM_CONTROL_ACCESS:
 506             return VLC_EGENERIC;
 507
 508         default:
 509             msg_Err( s, "invalid DStreamControl query=0x%x", i_query );
 510             return VLC_EGENERIC;
 511     }
 512 }
 513
 514 static int DStreamThread( stream_t *s )
 515 {
 516     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 517     demux_t *p_demux;
 518
 519     /* Create the demuxer */
 520     if( !(p_demux = demux2_New( s, "", p_sys->psz_name, "", s, p_sys->out,
 521                                VLC_FALSE )) )
 522     {
 523         return VLC_EGENERIC;
 524     }
 525
 526     p_sys->p_demux = p_demux;
 527
 528     /* Main loop */
 529     while( !s->b_die && !p_demux->b_die )
 530     {
 531         if( p_demux->pf_demux( p_demux ) <= 0 ) break;
 532     }
 533
 534     p_demux->b_die = VLC_TRUE;
 535     return VLC_SUCCESS;
 536 }
 537
 538 /****************************************************************************
 539  * Utility functions
 540  ****************************************************************************/
 541 static void SkipID3Tag( demux_t *p_demux )
 542 {
 543     uint8_t *p_peek;
 544     uint8_t version, revision;
 545     int i_size;
 546     int b_footer;
 547
 548     if( !p_demux->s ) return;
 549
 550     /* Get 10 byte id3 header */
 551     if( stream_Peek( p_demux->s, &p_peek, 10 ) < 10 ) return;
 552
 553     if( p_peek[0] != 'I' || p_peek[1] != 'D' || p_peek[2] != '3' ) return;
 554
 555     version = p_peek[3];
 556     revision = p_peek[4];
 557     b_footer = p_peek[5] & 0x10;
 558     i_size = (p_peek[6]<<21) + (p_peek[7]<<14) + (p_peek[8]<<7) + p_peek[9];
 559
 560     if( b_footer ) i_size += 10;
 561     i_size += 10;
 562
 563     /* Skip the entire tag */
 564     stream_Read( p_demux->s, NULL, i_size );
 565
 566     msg_Dbg( p_demux, "ID3v2.%d revision %d tag found, skiping %d bytes",
 567              version, revision, i_size );
 568
 569     return;
 570 }