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 void SkipID3Tag( demux_t * );
  29
  30 /*****************************************************************************
  31  * demux2_New:
  32  *  if s is NULL then load a access_demux
  33  *****************************************************************************/
  34 demux_t *__demux2_New( vlc_object_t *p_obj,
  35                        const char *psz_access, const char *psz_demux,
  36                        const char *psz_path,
  37                        stream_t *s, es_out_t *out, vlc_bool_t b_quick )
  38 {
  39     demux_t *p_demux = vlc_object_create( p_obj, VLC_OBJECT_DEMUX );
  40     const char *psz_module;
  41
  42     if( p_demux == NULL ) return NULL;
  43
  44     /* Parse URL */
  45     p_demux->psz_access = strdup( psz_access );
  46     p_demux->psz_demux  = strdup( psz_demux );
  47     p_demux->psz_path   = strdup( psz_path );
  48
  49     /* Take into account "demux" to be able to do :demux=dump */
  50     if( *p_demux->psz_demux == '\0' )
  51     {
  52         free( p_demux->psz_demux );
  53         p_demux->psz_demux = var_GetString( p_obj, "demux" );
  54     }
  55
  56     if( !b_quick )
  57     {
  58         msg_Dbg( p_obj, "creating demux: access='%s' demux='%s' path='%s'",
  59                  p_demux->psz_access, p_demux->psz_demux, p_demux->psz_path );
  60     }
  61
  62     p_demux->s          = s;
  63     p_demux->out        = out;
  64
  65     p_demux->pf_demux   = NULL;
  66     p_demux->pf_control = NULL;
  67     p_demux->p_sys      = NULL;
  68     p_demux->info.i_update = 0;
  69     p_demux->info.i_title  = 0;
  70     p_demux->info.i_seekpoint = 0;
  71
  72     if( s ) psz_module = p_demux->psz_demux;
  73     else psz_module = p_demux->psz_access;
  74
  75     if( s && *psz_module == '\0' && strrchr( p_demux->psz_path, '.' ) )
  76     {
  77        /* XXX: add only file without any problem here and with strong detection.
  78         *  - no .mp3, .a52, ... (aac is added as it works only by file ext
  79         *     anyway
  80         *  - wav can't be added 'cause of a52 and dts in them as raw audio
  81          */
  82          static const struct { char ext[5]; char demux[9]; } 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             { "m4v",  "m4v" },
 100             { "h264",  "h264" },
 101             { "",  "" },
 102         };
 103         /* Here, we don't mind if it does not work, it must be quick */
 104         static const struct { char ext[4]; char demux[5]; } exttodemux_quick[] =
 105         {
 106             { "mp3", "mpga" },
 107             { "ogg", "ogg" },
 108             { "wma", "asf" },
 109             { "", "" }
 110         };
 111
 112         const char *psz_ext = strrchr( p_demux->psz_path, '.' ) + 1;
 113         int  i;
 114
 115         if( !b_quick )
 116         {
 117             for( i = 0; exttodemux[i].ext[0]; i++ )
 118             {
 119                 if( !strcasecmp( psz_ext, exttodemux[i].ext ) )
 120                 {
 121                     psz_module = exttodemux[i].demux;
 122                     break;
 123                 }
 124             }
 125         }
 126         else
 127         {
 128             for( i = 0; exttodemux_quick[i].ext[0]; i++ )
 129             {
 130                 if( !strcasecmp( psz_ext, exttodemux_quick[i].ext ) )
 131                 {
 132                     psz_module = exttodemux_quick[i].demux;
 133                     break;
 134                 }
 135             }
 136
 137         }
 138     }
 139
 140     /* Before module_Need (for var_Create...) */
 141     vlc_object_attach( p_demux, p_obj );
 142
 143     if( s )
 144     {
 145         /* ID3 tags will mess-up demuxer probing so we skip it here.
 146          * ID3 parsers will called later on in the demuxer to access the
 147          * skipped info. */
 148         SkipID3Tag( p_demux );
 149
 150         p_demux->p_module =
 151             module_Need( p_demux, "demux2", psz_module,
 152                          !strcmp( psz_module, p_demux->psz_demux ) ?
 153                          VLC_TRUE : VLC_FALSE );
 154     }
 155     else
 156     {
 157         p_demux->p_module =
 158             module_Need( p_demux, "access_demux", psz_module,
 159                          !strcmp( psz_module, p_demux->psz_access ) ?
 160                          VLC_TRUE : VLC_FALSE );
 161     }
 162
 163     if( p_demux->p_module == NULL )
 164     {
 165         vlc_object_detach( p_demux );
 166         free( p_demux->psz_path );
 167         free( p_demux->psz_demux );
 168         free( p_demux->psz_access );
 169         vlc_object_destroy( p_demux );
 170         return NULL;
 171     }
 172
 173     return p_demux;
 174 }
 175
 176 /*****************************************************************************
 177  * demux2_Delete:
 178  *****************************************************************************/
 179 void demux2_Delete( demux_t *p_demux )
 180 {
 181     module_Unneed( p_demux, p_demux->p_module );
 182     vlc_object_detach( p_demux );
 183
 184     free( p_demux->psz_path );
 185     free( p_demux->psz_demux );
 186     free( p_demux->psz_access );
 187
 188     vlc_object_destroy( p_demux );
 189 }
 190
 191 /*****************************************************************************
 192  * demux2_vaControlHelper:
 193  *****************************************************************************/
 194 int demux2_vaControlHelper( stream_t *s,
 195                             int64_t i_start, int64_t i_end,
 196                             int i_bitrate, int i_align,
 197                             int i_query, va_list args )
 198 {
 199     int64_t i_tell;
 200     double  f, *pf;
 201     int64_t i64, *pi64;
 202
 203     if( i_end < 0 )    i_end   = stream_Size( s );
 204     if( i_start < 0 )  i_start = 0;
 205     if( i_align <= 0 ) i_align = 1;
 206     i_tell = stream_Tell( s );
 207
 208     switch( i_query )
 209     {
 210         case DEMUX_GET_LENGTH:
 211             pi64 = (int64_t*)va_arg( args, int64_t * );
 212             if( i_bitrate > 0 && i_end > i_start )
 213             {
 214                 *pi64 = I64C(8000000) * (i_end - i_start) / i_bitrate;
 215                 return VLC_SUCCESS;
 216             }
 217             return VLC_EGENERIC;
 218
 219         case DEMUX_GET_TIME:
 220             pi64 = (int64_t*)va_arg( args, int64_t * );
 221             if( i_bitrate > 0 && i_end > i_start )
 222             {
 223                 *pi64 = I64C(8000000) * (i_tell - i_start) / i_bitrate;
 224                 return VLC_SUCCESS;
 225             }
 226             return VLC_EGENERIC;
 227
 228         case DEMUX_GET_POSITION:
 229             pf = (double*)va_arg( args, double * );
 230             if( i_start < i_end )
 231             {
 232                 *pf = (double)( i_tell - i_start ) /
 233                       (double)( i_end  - i_start );
 234                 return VLC_SUCCESS;
 235             }
 236             return VLC_EGENERIC;
 237
 238
 239         case DEMUX_SET_POSITION:
 240             f = (double)va_arg( args, double );
 241             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
 242             {
 243                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
 244
 245                 if( stream_Seek( s, i_start + i_block * i_align ) )
 246                 {
 247                     return VLC_EGENERIC;
 248                 }
 249                 return VLC_SUCCESS;
 250             }
 251             return VLC_EGENERIC;
 252
 253         case DEMUX_SET_TIME:
 254             i64 = (int64_t)va_arg( args, int64_t );
 255             if( i_bitrate > 0 && i64 >= 0 )
 256             {
 257                 int64_t i_block = i64 * i_bitrate / I64C(8000000) / i_align;
 258                 if( stream_Seek( s, i_start + i_block * i_align ) )
 259                 {
 260                     return VLC_EGENERIC;
 261                 }
 262                 return VLC_SUCCESS;
 263             }
 264             return VLC_EGENERIC;
 265
 266         case DEMUX_GET_FPS:
 267         case DEMUX_GET_META:
 268         case DEMUX_SET_NEXT_DEMUX_TIME:
 269         case DEMUX_GET_TITLE_INFO:
 270         case DEMUX_SET_GROUP:
 271         case DEMUX_GET_ATTACHMENTS:
 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 *, const 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_read   = DStreamRead;
 315     s->pf_peek   = DStreamPeek;
 316     s->pf_control= DStreamControl;
 317
 318     s->i_char_width = 1;
 319     s->b_little_endian = VLC_FALSE;
 320
 321     s->p_sys = malloc( sizeof( d_stream_sys_t) );
 322     p_sys = (d_stream_sys_t*)s->p_sys;
 323
 324     p_sys->i_pos = 0;
 325     p_sys->out = out;
 326     p_sys->p_demux = NULL;
 327     p_sys->p_block = NULL;
 328     p_sys->psz_name = strdup( psz_demux );
 329
 330     /* decoder fifo */
 331     if( ( p_sys->p_fifo = block_FifoNew( s ) ) == NULL )
 332     {
 333         msg_Err( s, "out of memory" );
 334         vlc_object_destroy( s );
 335         free( p_sys );
 336         return NULL;
 337     }
 338
 339     if( vlc_thread_create( s, "stream out", DStreamThread,
 340                            VLC_THREAD_PRIORITY_INPUT, VLC_FALSE ) )
 341     {
 342         vlc_object_destroy( s );
 343         free( p_sys );
 344         return NULL;
 345     }
 346
 347     return s;
 348 }
 349
 350 void stream_DemuxSend( stream_t *s, block_t *p_block )
 351 {
 352     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 353     if( p_block ) block_FifoPut( p_sys->p_fifo, p_block );
 354 }
 355
 356 void stream_DemuxDelete( stream_t *s )
 357 {
 358     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 359     block_t *p_empty;
 360
 361     vlc_object_kill( s );
 362     if( p_sys->p_demux )
 363         vlc_object_kill( p_sys->p_demux );
 364     p_empty = block_New( s, 1 ); p_empty->i_buffer = 0;
 365     block_FifoPut( p_sys->p_fifo, p_empty );
 366     vlc_thread_join( s );
 367
 368     if( p_sys->p_demux ) demux2_Delete( p_sys->p_demux );
 369     if( p_sys->p_block ) block_Release( p_sys->p_block );
 370
 371     block_FifoRelease( p_sys->p_fifo );
 372     free( p_sys->psz_name );
 373     free( p_sys );
 374
 375     vlc_object_destroy( s );
 376 }
 377
 378
 379 static int DStreamRead( stream_t *s, void *p_read, int i_read )
 380 {
 381     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 382     uint8_t *p_out = p_read;
 383     int i_out = 0;
 384
 385     //msg_Dbg( s, "DStreamRead: wanted %d bytes", i_read );
 386
 387     while( !s->b_die && !s->b_error && i_read )
 388     {
 389         block_t *p_block = p_sys->p_block;
 390         int i_copy;
 391
 392         if( !p_block )
 393         {
 394             p_block = block_FifoGet( p_sys->p_fifo );
 395             if( !p_block ) s->b_error = 1;
 396             p_sys->p_block = p_block;
 397         }
 398
 399         if( p_block && i_read )
 400         {
 401             i_copy = __MIN( i_read, p_block->i_buffer );
 402             if( p_out && i_copy ) memcpy( p_out, p_block->p_buffer, i_copy );
 403             i_read -= i_copy;
 404             i_out += i_copy;
 405             p_block->i_buffer -= i_copy;
 406             p_block->p_buffer += i_copy;
 407
 408             if( !p_block->i_buffer )
 409             {
 410                 block_Release( p_block );
 411                 p_sys->p_block = NULL;
 412             }
 413         }
 414     }
 415
 416     p_sys->i_pos += i_out;
 417     return i_out;
 418 }
 419
 420 static int DStreamPeek( stream_t *s, const uint8_t **pp_peek, int i_peek )
 421 {
 422     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 423     block_t **pp_block = &p_sys->p_block;
 424     int i_out = 0;
 425     *pp_peek = 0;
 426
 427     //msg_Dbg( s, "DStreamPeek: wanted %d bytes", i_peek );
 428
 429     while( !s->b_die && !s->b_error && i_peek )
 430     {
 431         int i_copy;
 432
 433         if( !*pp_block )
 434         {
 435             *pp_block = block_FifoGet( p_sys->p_fifo );
 436             if( !*pp_block ) s->b_error = 1;
 437         }
 438
 439         if( *pp_block && i_peek )
 440         {
 441             i_copy = __MIN( i_peek, (*pp_block)->i_buffer );
 442             i_peek -= i_copy;
 443             i_out += i_copy;
 444
 445             if( i_peek ) pp_block = &(*pp_block)->p_next;
 446         }
 447     }
 448
 449     if( p_sys->p_block )
 450     {
 451         p_sys->p_block = block_ChainGather( p_sys->p_block );
 452         *pp_peek = p_sys->p_block->p_buffer;
 453     }
 454
 455     return i_out;
 456 }
 457
 458 static int DStreamControl( stream_t *s, int i_query, va_list args )
 459 {
 460     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 461     int64_t    *p_i64;
 462     vlc_bool_t *p_b;
 463     int        *p_int;
 464
 465     switch( i_query )
 466     {
 467         case STREAM_GET_SIZE:
 468             p_i64 = (int64_t*) va_arg( args, int64_t * );
 469             *p_i64 = 0;
 470             return VLC_SUCCESS;
 471
 472         case STREAM_CAN_SEEK:
 473             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 474             *p_b = VLC_FALSE;
 475             return VLC_SUCCESS;
 476
 477         case STREAM_CAN_FASTSEEK:
 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_GET_POSITION:
 483             p_i64 = (int64_t*) va_arg( args, int64_t * );
 484             *p_i64 = p_sys->i_pos;
 485             return VLC_SUCCESS;
 486
 487         case STREAM_SET_POSITION:
 488         {
 489             int64_t i64 = (int64_t)va_arg( args, int64_t );
 490             int i_skip;
 491             if( i64 < p_sys->i_pos ) return VLC_EGENERIC;
 492             i_skip = i64 - p_sys->i_pos;
 493
 494             while( i_skip > 0 )
 495             {
 496                 int i_read = DStreamRead( s, NULL, i_skip );
 497                 if( i_read <= 0 ) return VLC_EGENERIC;
 498                 i_skip -= i_read;
 499             }
 500             return VLC_SUCCESS;
 501         }
 502
 503         case STREAM_GET_MTU:
 504             p_int = (int*) va_arg( args, int * );
 505             *p_int = 0;
 506             return VLC_SUCCESS;
 507
 508         case STREAM_CONTROL_ACCESS:
 509             return VLC_EGENERIC;
 510
 511         default:
 512             msg_Err( s, "invalid DStreamControl query=0x%x", i_query );
 513             return VLC_EGENERIC;
 514     }
 515 }
 516
 517 static int DStreamThread( stream_t *s )
 518 {
 519     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 520     demux_t *p_demux;
 521
 522     /* Create the demuxer */
 523     if( !(p_demux = demux2_New( s, "", p_sys->psz_name, "", s, p_sys->out,
 524                                VLC_FALSE )) )
 525     {
 526         return VLC_EGENERIC;
 527     }
 528
 529     p_sys->p_demux = p_demux;
 530
 531     /* Main loop */
 532     while( !s->b_die && !p_demux->b_die )
 533     {
 534         if( p_demux->pf_demux( p_demux ) <= 0 ) break;
 535     }
 536
 537     vlc_object_kill( p_demux );
 538     return VLC_SUCCESS;
 539 }
 540
 541 /****************************************************************************
 542  * Utility functions
 543  ****************************************************************************/
 544 static void SkipID3Tag( demux_t *p_demux )
 545 {
 546     const uint8_t *p_peek;
 547     uint8_t version, revision;
 548     int i_size;
 549     int b_footer;
 550
 551     if( !p_demux->s ) return;
 552
 553     /* Get 10 byte id3 header */
 554     if( stream_Peek( p_demux->s, &p_peek, 10 ) < 10 ) return;
 555
 556     if( p_peek[0] != 'I' || p_peek[1] != 'D' || p_peek[2] != '3' ) return;
 557
 558     version = p_peek[3];
 559     revision = p_peek[4];
 560     b_footer = p_peek[5] & 0x10;
 561     i_size = (p_peek[6]<<21) + (p_peek[7]<<14) + (p_peek[8]<<7) + p_peek[9];
 562
 563     if( b_footer ) i_size += 10;
 564     i_size += 10;
 565
 566     /* Skip the entire tag */
 567     stream_Read( p_demux->s, NULL, i_size );
 568
 569     msg_Dbg( p_demux, "ID3v2.%d revision %d tag found, skipping %d bytes",
 570              version, revision, i_size );
 571
 572     return;
 573 }