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 #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
  80         *     anyway
  81         *  - wav can't be added 'cause of a52 and dts in them as raw audio
  82          */
  83          static struct { char *ext; char *demux; } 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             { NULL,  NULL },
 101         };
 102         /* Here, we don't mind if it does not work, it must be quick */
 103         static struct { char *ext; char *demux; } exttodemux_quick[] =
 104         {
 105             { "mp3", "mpga" },
 106             { "ogg", "ogg" },
 107             { "wma", "asf" },
 108             { NULL, NULL }
 109         };
 110
 111         char *psz_ext = strrchr( p_demux->psz_path, '.' ) + 1;
 112         int  i;
 113
 114         if( !b_quick )
 115         {
 116             for( i = 0; exttodemux[i].ext != NULL; i++ )
 117             {
 118                 if( !strcasecmp( psz_ext, exttodemux[i].ext ) )
 119                 {
 120                     psz_module = exttodemux[i].demux;
 121                     break;
 122                 }
 123             }
 124         }
 125         else
 126         {
 127             for( i = 0; exttodemux_quick[i].ext != NULL; i++ )
 128             {
 129                 if( !strcasecmp( psz_ext, exttodemux_quick[i].ext ) )
 130                 {
 131                     psz_module = exttodemux_quick[i].demux;
 132                     break;
 133                 }
 134             }
 135
 136         }
 137     }
 138
 139     /* Before module_Need (for var_Create...) */
 140     vlc_object_attach( p_demux, p_obj );
 141
 142     if( s )
 143     {
 144         /* ID3 tags will mess-up demuxer probing so we skip it here.
 145          * ID3 parsers will called later on in the demuxer to access the
 146          * skipped info. */
 147         SkipID3Tag( p_demux );
 148
 149         p_demux->p_module =
 150             module_Need( p_demux, "demux2", psz_module,
 151                          !strcmp( psz_module, p_demux->psz_demux ) ?
 152                          VLC_TRUE : VLC_FALSE );
 153     }
 154     else
 155     {
 156         p_demux->p_module =
 157             module_Need( p_demux, "access_demux", psz_module,
 158                          !strcmp( psz_module, p_demux->psz_access ) ?
 159                          VLC_TRUE : VLC_FALSE );
 160     }
 161
 162     if( p_demux->p_module == NULL )
 163     {
 164         vlc_object_detach( p_demux );
 165         free( p_demux->psz_path );
 166         free( p_demux->psz_demux );
 167         free( p_demux->psz_access );
 168         vlc_object_destroy( p_demux );
 169         return NULL;
 170     }
 171
 172     return p_demux;
 173 }
 174
 175 /*****************************************************************************
 176  * demux2_Delete:
 177  *****************************************************************************/
 178 void demux2_Delete( demux_t *p_demux )
 179 {
 180     module_Unneed( p_demux, p_demux->p_module );
 181     vlc_object_detach( p_demux );
 182
 183     free( p_demux->psz_path );
 184     free( p_demux->psz_demux );
 185     free( p_demux->psz_access );
 186
 187     vlc_object_destroy( p_demux );
 188 }
 189
 190 /*****************************************************************************
 191  * demux2_vaControlHelper:
 192  *****************************************************************************/
 193 int demux2_vaControlHelper( stream_t *s,
 194                             int64_t i_start, int64_t i_end,
 195                             int i_bitrate, int i_align,
 196                             int i_query, va_list args )
 197 {
 198     int64_t i_tell;
 199     double  f, *pf;
 200     int64_t i64, *pi64;
 201
 202     if( i_end < 0 )    i_end   = stream_Size( s );
 203     if( i_start < 0 )  i_start = 0;
 204     if( i_align <= 0 ) i_align = 1;
 205     i_tell = stream_Tell( s );
 206
 207     switch( i_query )
 208     {
 209         case DEMUX_GET_LENGTH:
 210             pi64 = (int64_t*)va_arg( args, int64_t * );
 211             if( i_bitrate > 0 && i_end > i_start )
 212             {
 213                 *pi64 = I64C(8000000) * (i_end - i_start) / i_bitrate;
 214                 return VLC_SUCCESS;
 215             }
 216             return VLC_EGENERIC;
 217
 218         case DEMUX_GET_TIME:
 219             pi64 = (int64_t*)va_arg( args, int64_t * );
 220             if( i_bitrate > 0 && i_end > i_start )
 221             {
 222                 *pi64 = I64C(8000000) * (i_tell - i_start) / i_bitrate;
 223                 return VLC_SUCCESS;
 224             }
 225             return VLC_EGENERIC;
 226
 227         case DEMUX_GET_POSITION:
 228             pf = (double*)va_arg( args, double * );
 229             if( i_start < i_end )
 230             {
 231                 *pf = (double)( i_tell - i_start ) /
 232                       (double)( i_end  - i_start );
 233                 return VLC_SUCCESS;
 234             }
 235             return VLC_EGENERIC;
 236
 237
 238         case DEMUX_SET_POSITION:
 239             f = (double)va_arg( args, double );
 240             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
 241             {
 242                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
 243
 244                 if( stream_Seek( s, i_start + i_block * i_align ) )
 245                 {
 246                     return VLC_EGENERIC;
 247                 }
 248                 return VLC_SUCCESS;
 249             }
 250             return VLC_EGENERIC;
 251
 252         case DEMUX_SET_TIME:
 253             i64 = (int64_t)va_arg( args, int64_t );
 254             if( i_bitrate > 0 && i64 >= 0 )
 255             {
 256                 int64_t i_block = i64 * i_bitrate / I64C(8000000) / i_align;
 257                 if( stream_Seek( s, i_start + i_block * i_align ) )
 258                 {
 259                     return VLC_EGENERIC;
 260                 }
 261                 return VLC_SUCCESS;
 262             }
 263             return VLC_EGENERIC;
 264
 265         case DEMUX_GET_FPS:
 266         case DEMUX_GET_META:
 267         case DEMUX_SET_NEXT_DEMUX_TIME:
 268         case DEMUX_GET_TITLE_INFO:
 269         case DEMUX_SET_GROUP:
 270             return VLC_EGENERIC;
 271
 272         default:
 273             msg_Err( s, "unknown query in demux_vaControlDefault" );
 274             return VLC_EGENERIC;
 275     }
 276 }
 277
 278 /****************************************************************************
 279  * stream_Demux*: create a demuxer for an outpout stream (allow demuxer chain)
 280  ****************************************************************************/
 281 typedef struct
 282 {
 283     /* Data buffer */
 284     block_fifo_t *p_fifo;
 285     block_t      *p_block;
 286
 287     int64_t     i_pos;
 288
 289     /* Demuxer */
 290     char        *psz_name;
 291     es_out_t    *out;
 292     demux_t     *p_demux;
 293
 294 } d_stream_sys_t;
 295
 296 static int DStreamRead   ( stream_t *, void *p_read, int i_read );
 297 static int DStreamPeek   ( stream_t *, uint8_t **pp_peek, int i_peek );
 298 static int DStreamControl( stream_t *, int i_query, va_list );
 299 static int DStreamThread ( stream_t * );
 300
 301
 302 stream_t *__stream_DemuxNew( vlc_object_t *p_obj, char *psz_demux,
 303                              es_out_t *out )
 304 {
 305     /* We create a stream reader, and launch a thread */
 306     stream_t       *s;
 307     d_stream_sys_t *p_sys;
 308
 309     if( psz_demux == NULL || *psz_demux == '\0' ) return NULL;
 310
 311     s = vlc_object_create( p_obj, VLC_OBJECT_STREAM );
 312     s->pf_block  = NULL;
 313     s->pf_read   = DStreamRead;
 314     s->pf_peek   = DStreamPeek;
 315     s->pf_control= DStreamControl;
 316
 317     s->i_char_width = 1;
 318     s->b_little_endian = VLC_FALSE;
 319
 320     s->p_sys = malloc( sizeof( d_stream_sys_t) );
 321     p_sys = (d_stream_sys_t*)s->p_sys;
 322
 323     p_sys->i_pos = 0;
 324     p_sys->out = out;
 325     p_sys->p_demux = NULL;
 326     p_sys->p_block = NULL;
 327     p_sys->psz_name = strdup( psz_demux );
 328
 329     /* decoder fifo */
 330     if( ( p_sys->p_fifo = block_FifoNew( s ) ) == NULL )
 331     {
 332         msg_Err( s, "out of memory" );
 333         vlc_object_destroy( s );
 334         free( p_sys );
 335         return NULL;
 336     }
 337
 338     if( vlc_thread_create( s, "stream out", DStreamThread,
 339                            VLC_THREAD_PRIORITY_INPUT, VLC_FALSE ) )
 340     {
 341         vlc_object_destroy( s );
 342         free( p_sys );
 343         return NULL;
 344     }
 345
 346     return s;
 347 }
 348
 349 void stream_DemuxSend( stream_t *s, block_t *p_block )
 350 {
 351     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 352     if( p_block ) block_FifoPut( p_sys->p_fifo, p_block );
 353 }
 354
 355 void stream_DemuxDelete( stream_t *s )
 356 {
 357     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 358     block_t *p_empty;
 359
 360     s->b_die = VLC_TRUE;
 361     if( p_sys->p_demux ) p_sys->p_demux->b_die = VLC_TRUE;
 362     p_empty = block_New( s, 1 ); p_empty->i_buffer = 0;
 363     block_FifoPut( p_sys->p_fifo, p_empty );
 364     vlc_thread_join( s );
 365
 366     if( p_sys->p_demux ) demux2_Delete( p_sys->p_demux );
 367     if( p_sys->p_block ) block_Release( p_sys->p_block );
 368
 369     block_FifoRelease( p_sys->p_fifo );
 370     free( p_sys->psz_name );
 371     free( p_sys );
 372
 373     vlc_object_destroy( s );
 374 }
 375
 376
 377 static int DStreamRead( stream_t *s, void *p_read, int i_read )
 378 {
 379     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 380     uint8_t *p_out = p_read;
 381     int i_out = 0;
 382
 383     //msg_Dbg( s, "DStreamRead: wanted %d bytes", i_read );
 384
 385     while( !s->b_die && !s->b_error && i_read )
 386     {
 387         block_t *p_block = p_sys->p_block;
 388         int i_copy;
 389
 390         if( !p_block )
 391         {
 392             p_block = block_FifoGet( p_sys->p_fifo );
 393             if( !p_block ) s->b_error = 1;
 394             p_sys->p_block = p_block;
 395         }
 396
 397         if( p_block && i_read )
 398         {
 399             i_copy = __MIN( i_read, p_block->i_buffer );
 400             if( p_out && i_copy ) memcpy( p_out, p_block->p_buffer, i_copy );
 401             i_read -= i_copy;
 402             i_out += i_copy;
 403             p_block->i_buffer -= i_copy;
 404             p_block->p_buffer += i_copy;
 405
 406             if( !p_block->i_buffer )
 407             {
 408                 block_Release( p_block );
 409                 p_sys->p_block = NULL;
 410             }
 411         }
 412     }
 413
 414     p_sys->i_pos += i_out;
 415     return i_out;
 416 }
 417
 418 static int DStreamPeek( stream_t *s, uint8_t **pp_peek, int i_peek )
 419 {
 420     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 421     block_t **pp_block = &p_sys->p_block;
 422     int i_out = 0;
 423     *pp_peek = 0;
 424
 425     //msg_Dbg( s, "DStreamPeek: wanted %d bytes", i_peek );
 426
 427     while( !s->b_die && !s->b_error && i_peek )
 428     {
 429         int i_copy;
 430
 431         if( !*pp_block )
 432         {
 433             *pp_block = block_FifoGet( p_sys->p_fifo );
 434             if( !*pp_block ) s->b_error = 1;
 435         }
 436
 437         if( *pp_block && i_peek )
 438         {
 439             i_copy = __MIN( i_peek, (*pp_block)->i_buffer );
 440             i_peek -= i_copy;
 441             i_out += i_copy;
 442
 443             if( i_peek ) pp_block = &(*pp_block)->p_next;
 444         }
 445     }
 446
 447     if( p_sys->p_block )
 448     {
 449         p_sys->p_block = block_ChainGather( p_sys->p_block );
 450         *pp_peek = p_sys->p_block->p_buffer;
 451     }
 452
 453     return i_out;
 454 }
 455
 456 static int DStreamControl( stream_t *s, int i_query, va_list args )
 457 {
 458     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 459     int64_t    *p_i64;
 460     vlc_bool_t *p_b;
 461     int        *p_int;
 462
 463     switch( i_query )
 464     {
 465         case STREAM_GET_SIZE:
 466             p_i64 = (int64_t*) va_arg( args, int64_t * );
 467             *p_i64 = 0;
 468             return VLC_SUCCESS;
 469
 470         case STREAM_CAN_SEEK:
 471             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 472             *p_b = VLC_FALSE;
 473             return VLC_SUCCESS;
 474
 475         case STREAM_CAN_FASTSEEK:
 476             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 477             *p_b = VLC_FALSE;
 478             return VLC_SUCCESS;
 479
 480         case STREAM_GET_POSITION:
 481             p_i64 = (int64_t*) va_arg( args, int64_t * );
 482             *p_i64 = p_sys->i_pos;
 483             return VLC_SUCCESS;
 484
 485         case STREAM_SET_POSITION:
 486         {
 487             int64_t i64 = (int64_t)va_arg( args, int64_t );
 488             int i_skip;
 489             if( i64 < p_sys->i_pos ) return VLC_EGENERIC;
 490             i_skip = i64 - p_sys->i_pos;
 491
 492             while( i_skip > 0 )
 493             {
 494                 int i_read = DStreamRead( s, NULL, i_skip );
 495                 if( i_read <= 0 ) return VLC_EGENERIC;
 496                 i_skip -= i_read;
 497             }
 498             return VLC_SUCCESS;
 499         }
 500
 501         case STREAM_GET_MTU:
 502             p_int = (int*) va_arg( args, int * );
 503             *p_int = 0;
 504             return VLC_SUCCESS;
 505
 506         case STREAM_CONTROL_ACCESS:
 507             return VLC_EGENERIC;
 508
 509         default:
 510             msg_Err( s, "invalid DStreamControl query=0x%x", i_query );
 511             return VLC_EGENERIC;
 512     }
 513 }
 514
 515 static int DStreamThread( stream_t *s )
 516 {
 517     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 518     demux_t *p_demux;
 519
 520     /* Create the demuxer */
 521     if( !(p_demux = demux2_New( s, "", p_sys->psz_name, "", s, p_sys->out,
 522                                VLC_FALSE )) )
 523     {
 524         return VLC_EGENERIC;
 525     }
 526
 527     p_sys->p_demux = p_demux;
 528
 529     /* Main loop */
 530     while( !s->b_die && !p_demux->b_die )
 531     {
 532         if( p_demux->pf_demux( p_demux ) <= 0 ) break;
 533     }
 534
 535     p_demux->b_die = VLC_TRUE;
 536     return VLC_SUCCESS;
 537 }
 538
 539 /****************************************************************************
 540  * Utility functions
 541  ****************************************************************************/
 542 static void SkipID3Tag( demux_t *p_demux )
 543 {
 544     uint8_t *p_peek;
 545     uint8_t version, revision;
 546     int i_size;
 547     int b_footer;
 548
 549     if( !p_demux->s ) return;
 550
 551     /* Get 10 byte id3 header */
 552     if( stream_Peek( p_demux->s, &p_peek, 10 ) < 10 ) return;
 553
 554     if( p_peek[0] != 'I' || p_peek[1] != 'D' || p_peek[2] != '3' ) return;
 555
 556     version = p_peek[3];
 557     revision = p_peek[4];
 558     b_footer = p_peek[5] & 0x10;
 559     i_size = (p_peek[6]<<21) + (p_peek[7]<<14) + (p_peek[8]<<7) + p_peek[9];
 560
 561     if( b_footer ) i_size += 10;
 562     i_size += 10;
 563
 564     /* Skip the entire tag */
 565     stream_Read( p_demux->s, NULL, i_size );
 566
 567     msg_Dbg( p_demux, "ID3v2.%d revision %d tag found, skiping %d bytes",
 568              version, revision, i_size );
 569
 570     return;
 571 }