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 )
  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=demuxdump */
  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     msg_Dbg( p_obj, "demux2_New: access='%s' demux='%s' path='%s'",
  59              p_demux->psz_access, p_demux->psz_demux, p_demux->psz_path );
  60
  61     p_demux->s          = s;
  62     p_demux->out        = out;
  63
  64     p_demux->pf_demux   = NULL;
  65     p_demux->pf_control = NULL;
  66     p_demux->p_sys      = NULL;
  67     p_demux->info.i_update = 0;
  68     p_demux->info.i_title  = 0;
  69     p_demux->info.i_seekpoint = 0;
  70
  71     if( s )
  72         psz_module = p_demux->psz_demux;
  73     else
  74         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",  "m3u" },
  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             { "",  "" },
 100         };
 101
 102         char *psz_ext = strrchr( p_demux->psz_path, '.' ) + 1;
 103         int  i;
 104
 105         for( i = 0; exttodemux[i].ext != NULL; i++ )
 106         {
 107             if( !strcasecmp( psz_ext, exttodemux[i].ext ) )
 108             {
 109                 psz_module = exttodemux[i].demux;
 110                 break;
 111             }
 112         }
 113     }
 114
 115     /* Before module_Need (for var_Create...) */
 116     vlc_object_attach( p_demux, p_obj );
 117
 118     if( s )
 119     {
 120         p_demux->p_module =
 121             module_Need( p_demux, "demux2", psz_module,
 122                          !strcmp( psz_module, p_demux->psz_demux ) ? VLC_TRUE : VLC_FALSE );
 123     }
 124     else
 125     {
 126         p_demux->p_module =
 127             module_Need( p_demux, "access_demux", psz_module,
 128                          !strcmp( psz_module, p_demux->psz_access ) ? VLC_TRUE : VLC_FALSE );
 129     }
 130
 131     if( p_demux->p_module == NULL )
 132     {
 133         vlc_object_detach( p_demux );
 134         free( p_demux->psz_path );
 135         free( p_demux->psz_demux );
 136         free( p_demux->psz_access );
 137         vlc_object_destroy( p_demux );
 138         return NULL;
 139     }
 140
 141     return p_demux;
 142 }
 143
 144 /*****************************************************************************
 145  * demux2_Delete:
 146  *****************************************************************************/
 147 void demux2_Delete( demux_t *p_demux )
 148 {
 149     module_Unneed( p_demux, p_demux->p_module );
 150     vlc_object_detach( p_demux );
 151
 152     free( p_demux->psz_path );
 153     free( p_demux->psz_demux );
 154     free( p_demux->psz_access );
 155
 156     vlc_object_destroy( p_demux );
 157 }
 158
 159 /*****************************************************************************
 160  * demux2_vaControlHelper:
 161  *****************************************************************************/
 162 int demux2_vaControlHelper( stream_t *s,
 163                             int64_t i_start, int64_t i_end,
 164                             int i_bitrate, int i_align,
 165                             int i_query, va_list args )
 166 {
 167     int64_t i_tell;
 168     double  f, *pf;
 169     int64_t i64, *pi64;
 170
 171     if( i_end < 0 )    i_end   = stream_Size( s );
 172     if( i_start < 0 )  i_start = 0;
 173     if( i_align <= 0 ) i_align = 1;
 174     i_tell = stream_Tell( s );
 175
 176     switch( i_query )
 177     {
 178         case DEMUX_GET_LENGTH:
 179             pi64 = (int64_t*)va_arg( args, int64_t * );
 180             if( i_bitrate > 0 && i_end > i_start )
 181             {
 182                 *pi64 = I64C(8000000) * (i_end - i_start) / i_bitrate;
 183                 return VLC_SUCCESS;
 184             }
 185             return VLC_EGENERIC;
 186
 187         case DEMUX_GET_TIME:
 188             pi64 = (int64_t*)va_arg( args, int64_t * );
 189             if( i_bitrate > 0 && i_end > i_start )
 190             {
 191                 *pi64 = I64C(8000000) * (i_tell - i_start) / i_bitrate;
 192                 return VLC_SUCCESS;
 193             }
 194             return VLC_EGENERIC;
 195
 196         case DEMUX_GET_POSITION:
 197             pf = (double*)va_arg( args, double * );
 198             if( i_start < i_end )
 199             {
 200                 *pf = (double)( i_tell - i_start ) /
 201                       (double)( i_end  - i_start );
 202                 return VLC_SUCCESS;
 203             }
 204             return VLC_EGENERIC;
 205
 206
 207         case DEMUX_SET_POSITION:
 208             f = (double)va_arg( args, double );
 209             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
 210             {
 211                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
 212
 213                 if( stream_Seek( s, i_start + i_block * i_align ) )
 214                 {
 215                     return VLC_EGENERIC;
 216                 }
 217                 return VLC_SUCCESS;
 218             }
 219             return VLC_EGENERIC;
 220
 221         case DEMUX_SET_TIME:
 222             i64 = (int64_t)va_arg( args, int64_t );
 223             if( i_bitrate > 0 && i64 >= 0 )
 224             {
 225                 int64_t i_block = i64 * i_bitrate / I64C(8000000) / i_align;
 226                 if( stream_Seek( s, i_start + i_block * i_align ) )
 227                 {
 228                     return VLC_EGENERIC;
 229                 }
 230                 return VLC_SUCCESS;
 231             }
 232             return VLC_EGENERIC;
 233
 234         case DEMUX_GET_FPS:
 235         case DEMUX_GET_META:
 236         case DEMUX_SET_NEXT_DEMUX_TIME:
 237         case DEMUX_GET_TITLE_INFO:
 238         case DEMUX_SET_GROUP:
 239             return VLC_EGENERIC;
 240
 241         default:
 242             msg_Err( s, "unknown query in demux_vaControlDefault" );
 243             return VLC_EGENERIC;
 244     }
 245 }
 246
 247 /****************************************************************************
 248  * stream_Demux*: create a demuxer for an outpout stream (allow demuxer chain)
 249  ****************************************************************************/
 250 typedef struct
 251 {
 252     /* Data buffer */
 253     vlc_mutex_t lock;
 254     int         i_buffer;
 255     int         i_buffer_size;
 256     uint8_t     *p_buffer;
 257
 258     int64_t     i_pos;
 259
 260     /* Demuxer */
 261     char        *psz_name;
 262     es_out_t    *out;
 263     demux_t     *p_demux;
 264 } d_stream_sys_t;
 265
 266 static int DStreamRead   ( stream_t *, void *p_read, int i_read );
 267 static int DStreamPeek   ( stream_t *, uint8_t **pp_peek, int i_peek );
 268 static int DStreamControl( stream_t *, int i_query, va_list );
 269 static int DStreamThread ( stream_t * );
 270
 271
 272 stream_t *__stream_DemuxNew( vlc_object_t *p_obj, char *psz_demux, es_out_t *out )
 273 {
 274     /* We create a stream reader, and launch a thread */
 275     stream_t       *s;
 276     d_stream_sys_t *p_sys;
 277
 278     if( psz_demux == NULL || *psz_demux == '\0' )
 279     {
 280         return NULL;
 281     }
 282
 283     s = vlc_object_create( p_obj, VLC_OBJECT_STREAM );
 284     s->pf_block  = NULL;
 285     s->pf_read   = DStreamRead;
 286     s->pf_peek   = DStreamPeek;
 287     s->pf_control= DStreamControl;
 288
 289     s->p_sys = malloc( sizeof( d_stream_sys_t) );
 290     p_sys = (d_stream_sys_t*)s->p_sys;
 291
 292     vlc_mutex_init( s, &p_sys->lock );
 293     p_sys->i_buffer = 0;
 294     p_sys->i_buffer_size = 1000000;
 295     p_sys->p_buffer = malloc( p_sys->i_buffer_size );
 296     p_sys->i_pos = 0;
 297     p_sys->psz_name = strdup( psz_demux );
 298     p_sys->out = out;
 299     p_sys->p_demux = NULL;
 300
 301     if( vlc_thread_create( s, "stream out", DStreamThread, VLC_THREAD_PRIORITY_INPUT, VLC_FALSE ) )
 302     {
 303         vlc_mutex_destroy( &p_sys->lock );
 304         vlc_object_destroy( s );
 305         free( p_sys );
 306         return NULL;
 307     }
 308
 309     return s;
 310 }
 311
 312 void     stream_DemuxSend( stream_t *s, block_t *p_block )
 313 {
 314     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 315
 316     if( p_block->i_buffer > 0 )
 317     {
 318         vlc_mutex_lock( &p_sys->lock );
 319         /* Realloc if needed */
 320         if( p_sys->i_buffer + p_block->i_buffer > p_sys->i_buffer_size )
 321         {
 322             if( p_sys->i_buffer_size > 5000000 )
 323             {
 324                 vlc_mutex_unlock( &p_sys->lock );
 325                 msg_Err( s, "stream_DemuxSend: buffer size > 5000000" );
 326                 block_Release( p_block );
 327                 return;
 328             }
 329             /* I know, it's more than needed but that's perfect */
 330             p_sys->i_buffer_size += p_block->i_buffer;
 331             /* FIXME won't work with PEEK -> segfault */
 332             p_sys->p_buffer = realloc( p_sys->p_buffer, p_sys->i_buffer_size );
 333             msg_Dbg( s, "stream_DemuxSend: realloc to %d", p_sys->i_buffer_size );
 334         }
 335
 336         /* copy data */
 337         memcpy( &p_sys->p_buffer[p_sys->i_buffer], p_block->p_buffer, p_block->i_buffer );
 338         p_sys->i_buffer += p_block->i_buffer;
 339
 340         vlc_mutex_unlock( &p_sys->lock );
 341     }
 342
 343     block_Release( p_block );
 344 }
 345
 346 void     stream_DemuxDelete( stream_t *s )
 347 {
 348     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 349
 350     s->b_die = VLC_TRUE;
 351
 352     vlc_mutex_lock( &p_sys->lock );
 353     if( p_sys->p_demux )
 354     {
 355         p_sys->p_demux->b_die = VLC_TRUE;
 356     }
 357     vlc_mutex_unlock( &p_sys->lock );
 358
 359     vlc_thread_join( s );
 360
 361     if( p_sys->p_demux )
 362     {
 363         demux2_Delete( p_sys->p_demux );
 364     }
 365     vlc_mutex_destroy( &p_sys->lock );
 366     free( p_sys->psz_name );
 367     free( p_sys->p_buffer );
 368     free( p_sys );
 369     vlc_object_destroy( s );
 370 }
 371
 372
 373 static int      DStreamRead   ( stream_t *s, void *p_read, int i_read )
 374 {
 375     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 376     int           i_copy;
 377
 378     //msg_Dbg( s, "DStreamRead: wanted %d bytes", i_read );
 379     for( ;; )
 380     {
 381         vlc_mutex_lock( &p_sys->lock );
 382         //msg_Dbg( s, "DStreamRead: buffer %d", p_sys->i_buffer );
 383         if( p_sys->i_buffer >= i_read || s->b_die )
 384         {
 385             break;
 386         }
 387         vlc_mutex_unlock( &p_sys->lock );
 388         msleep( 10000 );
 389     }
 390
 391     //msg_Dbg( s, "DStreamRead: read %d buffer %d", i_read, p_sys->i_buffer );
 392
 393     i_copy = __MIN( i_read, p_sys->i_buffer );
 394     if( i_copy > 0 )
 395     {
 396         if( p_read )
 397         {
 398             memcpy( p_read, p_sys->p_buffer, i_copy );
 399         }
 400         p_sys->i_buffer -= i_copy;
 401         p_sys->i_pos += i_copy;
 402
 403         if( p_sys->i_buffer > 0 )
 404         {
 405             memmove( p_sys->p_buffer, &p_sys->p_buffer[i_copy], p_sys->i_buffer );
 406         }
 407
 408     }
 409     vlc_mutex_unlock( &p_sys->lock );
 410
 411     return i_copy;
 412 }
 413 static int      DStreamPeek   ( stream_t *s, uint8_t **pp_peek, int i_peek )
 414 {
 415     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 416     int           i_copy;
 417
 418     //msg_Dbg( s, "DStreamPeek: wanted %d bytes", i_peek );
 419     for( ;; )
 420     {
 421         vlc_mutex_lock( &p_sys->lock );
 422         //msg_Dbg( s, "DStreamPeek: buffer %d", p_sys->i_buffer );
 423         if( p_sys->i_buffer >= i_peek || s->b_die )
 424         {
 425             break;
 426         }
 427         vlc_mutex_unlock( &p_sys->lock );
 428         msleep( 10000 );
 429     }
 430     *pp_peek = p_sys->p_buffer;
 431     i_copy = __MIN( i_peek, p_sys->i_buffer );
 432
 433     vlc_mutex_unlock( &p_sys->lock );
 434
 435     return i_copy;
 436 }
 437
 438 static int      DStreamControl( stream_t *s, int i_query, va_list args )
 439 {
 440     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 441     int64_t    *p_i64;
 442     vlc_bool_t *p_b;
 443     int        *p_int;
 444     switch( i_query )
 445     {
 446         case STREAM_GET_SIZE:
 447             p_i64 = (int64_t*) va_arg( args, int64_t * );
 448             *p_i64 = 0;
 449             return VLC_SUCCESS;
 450
 451         case STREAM_CAN_SEEK:
 452             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 453             *p_b = VLC_FALSE;
 454             return VLC_SUCCESS;
 455
 456         case STREAM_CAN_FASTSEEK:
 457             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 458             *p_b = VLC_FALSE;
 459             return VLC_SUCCESS;
 460
 461         case STREAM_GET_POSITION:
 462             p_i64 = (int64_t*) va_arg( args, int64_t * );
 463             *p_i64 = p_sys->i_pos;
 464             return VLC_SUCCESS;
 465
 466         case STREAM_SET_POSITION:
 467         {
 468             int64_t i64 = (int64_t)va_arg( args, int64_t );
 469             int i_skip;
 470             if( i64 < p_sys->i_pos )
 471                 return VLC_EGENERIC;
 472             i_skip = i64 - p_sys->i_pos;
 473
 474             while( i_skip > 0 )
 475             {
 476                 int i_read = DStreamRead( s, NULL, i_skip );
 477
 478                 if( i_read <= 0 )
 479                     return VLC_EGENERIC;
 480
 481                 i_skip -= i_read;
 482             }
 483             return VLC_SUCCESS;
 484         }
 485
 486         case STREAM_GET_MTU:
 487             p_int = (int*) va_arg( args, int * );
 488             *p_int = 0;
 489             return VLC_SUCCESS;
 490
 491         default:
 492             msg_Err( s, "invalid DStreamControl query=0x%x", i_query );
 493             return VLC_EGENERIC;
 494     }
 495 }
 496
 497 static int      DStreamThread ( stream_t *s )
 498 {
 499     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 500     demux_t      *p_demux;
 501
 502     /* Create the demuxer */
 503
 504     if( ( p_demux = demux2_New( s, "", p_sys->psz_name, "", s, p_sys->out ) ) == NULL )
 505     {
 506         return VLC_EGENERIC;
 507     }
 508
 509     vlc_mutex_lock( &p_sys->lock );
 510     p_sys->p_demux = p_demux;
 511     vlc_mutex_unlock( &p_sys->lock );
 512
 513     /* Main loop */
 514     while( !s->b_die && !p_demux->b_die )
 515     {
 516         if( p_demux->pf_demux( p_demux ) <= 0 )
 517         {
 518             break;
 519         }
 520     }
 521     p_demux->b_die = VLC_TRUE;
 522     return VLC_SUCCESS;
 523 }