git.sesse.net Git - vlc/blob - src/input/demux.c

   1 /*****************************************************************************
   2  * demux.c
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 VideoLAN
   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 /*****************************************************************************
  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                        char *psz_access, char *psz_demux, char *psz_path,
  36                        stream_t *s, es_out_t *out, vlc_bool_t b_quick )
  37 {
  38     demux_t *p_demux = vlc_object_create( p_obj, VLC_OBJECT_DEMUX );
  39     char *psz_module;
  40
  41     if( p_demux == NULL )
  42     {
  43         return NULL;
  44     }
  45
  46     /* Parse URL */
  47     p_demux->psz_access = strdup( psz_access );
  48     p_demux->psz_demux  = strdup( psz_demux );
  49     p_demux->psz_path   = strdup( psz_path );
  50
  51     /* Take into account "demux" to be able to do :demux=dump */
  52     if( *p_demux->psz_demux == '\0' )
  53     {
  54         free( p_demux->psz_demux );
  55         p_demux->psz_demux = var_GetString( p_obj, "demux" );
  56     }
  57
  58     if( !b_quick )
  59     {
  60         msg_Dbg( p_obj, "creating demux: access='%s' demux='%s' path='%s'",
  61                  p_demux->psz_access, p_demux->psz_demux, p_demux->psz_path );
  62     }
  63
  64     p_demux->s          = s;
  65     p_demux->out        = out;
  66
  67     p_demux->pf_demux   = NULL;
  68     p_demux->pf_control = NULL;
  69     p_demux->p_sys      = NULL;
  70     p_demux->info.i_update = 0;
  71     p_demux->info.i_title  = 0;
  72     p_demux->info.i_seekpoint = 0;
  73
  74     if( s )
  75         psz_module = p_demux->psz_demux;
  76     else
  77         psz_module = p_demux->psz_access;
  78
  79     if( s && *psz_module == '\0' && strrchr( p_demux->psz_path, '.' ) )
  80     {
  81         /* XXX: add only file without any problem here and with strong detection.
  82          *  - no .mp3, .a52, ... (aac is added as it works only by file ext anyway
  83          *  - wav can't be added 'cause of a52 and dts in them as raw audio
  84          */
  85          static struct { char *ext; char *demux; } 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",  "m3u" },
  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             { NULL,  NULL },
 103         };
 104         /* Here, we don't mind if it does not work, it must be quick */
 105         static struct { char *ext; char *demux; } exttodemux_quick[] =
 106         {
 107             { "mp3", "mpga" },
 108             { "ogg", "ogg" },
 109             { "wma", "asf" },
 110             { NULL, NULL }
 111         };
 112
 113         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 != NULL; 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 != NULL; 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         p_demux->p_module =
 147             module_Need( p_demux, "demux2", psz_module,
 148                          !strcmp( psz_module, p_demux->psz_demux ) ?
 149                          VLC_TRUE : VLC_FALSE );
 150     }
 151     else
 152     {
 153         p_demux->p_module =
 154             module_Need( p_demux, "access_demux", psz_module,
 155                          !strcmp( psz_module, p_demux->psz_access ) ?
 156                          VLC_TRUE : VLC_FALSE );
 157     }
 158
 159     if( p_demux->p_module == NULL )
 160     {
 161         vlc_object_detach( p_demux );
 162         free( p_demux->psz_path );
 163         free( p_demux->psz_demux );
 164         free( p_demux->psz_access );
 165         vlc_object_destroy( p_demux );
 166         return NULL;
 167     }
 168
 169     return p_demux;
 170 }
 171
 172 /*****************************************************************************
 173  * demux2_Delete:
 174  *****************************************************************************/
 175 void demux2_Delete( demux_t *p_demux )
 176 {
 177     module_Unneed( p_demux, p_demux->p_module );
 178     vlc_object_detach( p_demux );
 179
 180     free( p_demux->psz_path );
 181     free( p_demux->psz_demux );
 182     free( p_demux->psz_access );
 183
 184     vlc_object_destroy( p_demux );
 185 }
 186
 187 /*****************************************************************************
 188  * demux2_vaControlHelper:
 189  *****************************************************************************/
 190 int demux2_vaControlHelper( stream_t *s,
 191                             int64_t i_start, int64_t i_end,
 192                             int i_bitrate, int i_align,
 193                             int i_query, va_list args )
 194 {
 195     int64_t i_tell;
 196     double  f, *pf;
 197     int64_t i64, *pi64;
 198
 199     if( i_end < 0 )    i_end   = stream_Size( s );
 200     if( i_start < 0 )  i_start = 0;
 201     if( i_align <= 0 ) i_align = 1;
 202     i_tell = stream_Tell( s );
 203
 204     switch( i_query )
 205     {
 206         case DEMUX_GET_LENGTH:
 207             pi64 = (int64_t*)va_arg( args, int64_t * );
 208             if( i_bitrate > 0 && i_end > i_start )
 209             {
 210                 *pi64 = I64C(8000000) * (i_end - i_start) / i_bitrate;
 211                 return VLC_SUCCESS;
 212             }
 213             return VLC_EGENERIC;
 214
 215         case DEMUX_GET_TIME:
 216             pi64 = (int64_t*)va_arg( args, int64_t * );
 217             if( i_bitrate > 0 && i_end > i_start )
 218             {
 219                 *pi64 = I64C(8000000) * (i_tell - i_start) / i_bitrate;
 220                 return VLC_SUCCESS;
 221             }
 222             return VLC_EGENERIC;
 223
 224         case DEMUX_GET_POSITION:
 225             pf = (double*)va_arg( args, double * );
 226             if( i_start < i_end )
 227             {
 228                 *pf = (double)( i_tell - i_start ) /
 229                       (double)( i_end  - i_start );
 230                 return VLC_SUCCESS;
 231             }
 232             return VLC_EGENERIC;
 233
 234
 235         case DEMUX_SET_POSITION:
 236             f = (double)va_arg( args, double );
 237             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
 238             {
 239                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
 240
 241                 if( stream_Seek( s, i_start + i_block * i_align ) )
 242                 {
 243                     return VLC_EGENERIC;
 244                 }
 245                 return VLC_SUCCESS;
 246             }
 247             return VLC_EGENERIC;
 248
 249         case DEMUX_SET_TIME:
 250             i64 = (int64_t)va_arg( args, int64_t );
 251             if( i_bitrate > 0 && i64 >= 0 )
 252             {
 253                 int64_t i_block = i64 * i_bitrate / I64C(8000000) / i_align;
 254                 if( stream_Seek( s, i_start + i_block * i_align ) )
 255                 {
 256                     return VLC_EGENERIC;
 257                 }
 258                 return VLC_SUCCESS;
 259             }
 260             return VLC_EGENERIC;
 261
 262         case DEMUX_GET_FPS:
 263         case DEMUX_GET_META:
 264         case DEMUX_SET_NEXT_DEMUX_TIME:
 265         case DEMUX_GET_TITLE_INFO:
 266         case DEMUX_SET_GROUP:
 267             return VLC_EGENERIC;
 268
 269         default:
 270             msg_Err( s, "unknown query in demux_vaControlDefault" );
 271             return VLC_EGENERIC;
 272     }
 273 }
 274
 275 /****************************************************************************
 276  * stream_Demux*: create a demuxer for an outpout stream (allow demuxer chain)
 277  ****************************************************************************/
 278 typedef struct
 279 {
 280     /* Data buffer */
 281     block_fifo_t *p_fifo;
 282     block_t      *p_block;
 283
 284     int64_t     i_pos;
 285
 286     /* Demuxer */
 287     char        *psz_name;
 288     es_out_t    *out;
 289     demux_t     *p_demux;
 290
 291 } d_stream_sys_t;
 292
 293 static int DStreamRead   ( stream_t *, void *p_read, int i_read );
 294 static int DStreamPeek   ( stream_t *, uint8_t **pp_peek, int i_peek );
 295 static int DStreamControl( stream_t *, int i_query, va_list );
 296 static int DStreamThread ( stream_t * );
 297
 298
 299 stream_t *__stream_DemuxNew( vlc_object_t *p_obj, char *psz_demux,
 300                              es_out_t *out )
 301 {
 302     /* We create a stream reader, and launch a thread */
 303     stream_t       *s;
 304     d_stream_sys_t *p_sys;
 305
 306     if( psz_demux == NULL || *psz_demux == '\0' ) return NULL;
 307
 308     s = vlc_object_create( p_obj, VLC_OBJECT_STREAM );
 309     s->pf_block  = NULL;
 310     s->pf_read   = DStreamRead;
 311     s->pf_peek   = DStreamPeek;
 312     s->pf_control= DStreamControl;
 313
 314     s->p_sys = malloc( sizeof( d_stream_sys_t) );
 315     p_sys = (d_stream_sys_t*)s->p_sys;
 316
 317     p_sys->i_pos = 0;
 318     p_sys->out = out;
 319     p_sys->p_demux = NULL;
 320     p_sys->p_block = NULL;
 321     p_sys->psz_name = strdup( psz_demux );
 322
 323     /* decoder fifo */
 324     if( ( p_sys->p_fifo = block_FifoNew( s ) ) == NULL )
 325     {
 326         msg_Err( s, "out of memory" );
 327         vlc_object_destroy( s );
 328         free( p_sys );
 329         return NULL;
 330     }
 331
 332     if( vlc_thread_create( s, "stream out", DStreamThread,
 333                            VLC_THREAD_PRIORITY_INPUT, VLC_FALSE ) )
 334     {
 335         vlc_object_destroy( s );
 336         free( p_sys );
 337         return NULL;
 338     }
 339
 340     return s;
 341 }
 342
 343 void stream_DemuxSend( stream_t *s, block_t *p_block )
 344 {
 345     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 346     if( p_block ) block_FifoPut( p_sys->p_fifo, p_block );
 347 }
 348
 349 void stream_DemuxDelete( stream_t *s )
 350 {
 351     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 352     block_t *p_empty;
 353
 354     s->b_die = VLC_TRUE;
 355     if( p_sys->p_demux ) p_sys->p_demux->b_die = VLC_TRUE;
 356     p_empty = block_New( s, 1 ); p_empty->i_buffer = 0;
 357     block_FifoPut( p_sys->p_fifo, p_empty );
 358     vlc_thread_join( s );
 359
 360     if( p_sys->p_demux ) demux2_Delete( p_sys->p_demux );
 361     if( p_sys->p_block ) block_Release( p_sys->p_block );
 362
 363     block_FifoRelease( p_sys->p_fifo );
 364     free( p_sys->psz_name );
 365     free( p_sys );
 366
 367     vlc_object_destroy( s );
 368 }
 369
 370
 371 static int DStreamRead( stream_t *s, void *p_read, int i_read )
 372 {
 373     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 374     uint8_t *p_out = p_read;
 375     int i_out = 0;
 376
 377     //msg_Dbg( s, "DStreamRead: wanted %d bytes", i_read );
 378
 379     while( !s->b_die && !s->b_error && i_read )
 380     {
 381         block_t *p_block = p_sys->p_block;
 382         int i_copy;
 383
 384         if( !p_block )
 385         {
 386             p_block = block_FifoGet( p_sys->p_fifo );
 387             if( !p_block ) s->b_error = 1;
 388             p_sys->p_block = p_block;
 389         }
 390
 391         if( p_block && i_read )
 392         {
 393             i_copy = __MIN( i_read, p_block->i_buffer );
 394             if( p_out && i_copy ) memcpy( p_out, p_block->p_buffer, i_copy );
 395             i_read -= i_copy;
 396             i_out += i_copy;
 397             p_block->i_buffer -= i_copy;
 398             p_block->p_buffer += i_copy;
 399
 400             if( !p_block->i_buffer )
 401             {
 402                 block_Release( p_block );
 403                 p_sys->p_block = NULL;
 404             }
 405         }
 406     }
 407
 408     p_sys->i_pos += i_out;
 409     return i_out;
 410 }
 411
 412 static int DStreamPeek( stream_t *s, uint8_t **pp_peek, int i_peek )
 413 {
 414     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 415     block_t **pp_block = &p_sys->p_block;
 416     int i_out = 0;
 417     *pp_peek = 0;
 418
 419     //msg_Dbg( s, "DStreamPeek: wanted %d bytes", i_peek );
 420
 421     while( !s->b_die && !s->b_error && i_peek )
 422     {
 423         int i_copy;
 424
 425         if( !*pp_block )
 426         {
 427             *pp_block = block_FifoGet( p_sys->p_fifo );
 428             if( !*pp_block ) s->b_error = 1;
 429         }
 430
 431         if( *pp_block && i_peek )
 432         {
 433             i_copy = __MIN( i_peek, (*pp_block)->i_buffer );
 434             i_peek -= i_copy;
 435             i_out += i_copy;
 436
 437             if( i_peek ) pp_block = &(*pp_block)->p_next;
 438         }
 439     }
 440
 441     if( p_sys->p_block )
 442     {
 443         p_sys->p_block = block_ChainGather( p_sys->p_block );
 444         *pp_peek = p_sys->p_block->p_buffer;
 445     }
 446
 447     return i_out;
 448 }
 449
 450 static int DStreamControl( stream_t *s, int i_query, va_list args )
 451 {
 452     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 453     int64_t    *p_i64;
 454     vlc_bool_t *p_b;
 455     int        *p_int;
 456
 457     switch( i_query )
 458     {
 459         case STREAM_GET_SIZE:
 460             p_i64 = (int64_t*) va_arg( args, int64_t * );
 461             *p_i64 = 0;
 462             return VLC_SUCCESS;
 463
 464         case STREAM_CAN_SEEK:
 465             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 466             *p_b = VLC_FALSE;
 467             return VLC_SUCCESS;
 468
 469         case STREAM_CAN_FASTSEEK:
 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_GET_POSITION:
 475             p_i64 = (int64_t*) va_arg( args, int64_t * );
 476             *p_i64 = p_sys->i_pos;
 477             return VLC_SUCCESS;
 478
 479         case STREAM_SET_POSITION:
 480         {
 481             int64_t i64 = (int64_t)va_arg( args, int64_t );
 482             int i_skip;
 483             if( i64 < p_sys->i_pos ) return VLC_EGENERIC;
 484             i_skip = i64 - p_sys->i_pos;
 485
 486             while( i_skip > 0 )
 487             {
 488                 int i_read = DStreamRead( s, NULL, i_skip );
 489                 if( i_read <= 0 ) return VLC_EGENERIC;
 490                 i_skip -= i_read;
 491             }
 492             return VLC_SUCCESS;
 493         }
 494
 495         case STREAM_GET_MTU:
 496             p_int = (int*) va_arg( args, int * );
 497             *p_int = 0;
 498             return VLC_SUCCESS;
 499
 500         case STREAM_CONTROL_ACCESS:
 501             return VLC_EGENERIC;
 502
 503         default:
 504             msg_Err( s, "invalid DStreamControl query=0x%x", i_query );
 505             return VLC_EGENERIC;
 506     }
 507 }
 508
 509 static int DStreamThread( stream_t *s )
 510 {
 511     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 512     demux_t *p_demux;
 513
 514     /* Create the demuxer */
 515     if( !(p_demux = demux2_New( s, "", p_sys->psz_name, "", s, p_sys->out,
 516                                VLC_FALSE )) )
 517     {
 518         return VLC_EGENERIC;
 519     }
 520
 521     p_sys->p_demux = p_demux;
 522
 523     /* Main loop */
 524     while( !s->b_die && !p_demux->b_die )
 525     {
 526         if( p_demux->pf_demux( p_demux ) <= 0 ) break;
 527     }
 528
 529     p_demux->b_die = VLC_TRUE;
 530     return VLC_SUCCESS;
 531 }