git.sesse.net Git - vlc/blob - src/control/media_instance.c

   1 /*****************************************************************************
   2  * media_instance.c: Libvlc API Media Instance management functions
   3  *****************************************************************************
   4  * Copyright (C) 2005 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Clément Stenac <zorglub@videolan.org>
   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/libvlc.h>
  25 #include <vlc_demux.h>
  26 #include <vlc_input.h>
  27 #include "libvlc_internal.h"
  28 #include "libvlc.h"
  29
  30 static const libvlc_state_t vlc_to_libvlc_state_array[] =
  31 {
  32     [INIT_S]        = libvlc_Opening,
  33     [OPENING_S]     = libvlc_Opening,
  34     [BUFFERING_S]   = libvlc_Buffering,
  35     [PLAYING_S]     = libvlc_Playing,
  36     [PAUSE_S]       = libvlc_Paused,
  37     [END_S]         = libvlc_Ended,
  38     [ERROR_S]       = libvlc_Error,
  39 };
  40 static inline libvlc_state_t vlc_to_libvlc_state( int vlc_state )
  41 {
  42     if( vlc_state < 0 || vlc_state > 6 )
  43         return libvlc_Stopped;
  44
  45     return vlc_to_libvlc_state_array[vlc_state];
  46 }
  47
  48 /*
  49  * Release the associated input thread
  50  *
  51  * Object lock is NOT held.
  52  */
  53 static void release_input_thread( libvlc_media_instance_t *p_mi )
  54 {
  55     input_thread_t *p_input_thread;
  56
  57     if( !p_mi || p_mi->i_input_id == -1 )
  58         return;
  59
  60     p_input_thread = (input_thread_t*)vlc_object_get(
  61                                              p_mi->p_libvlc_instance->p_libvlc_int,
  62                                              p_mi->i_input_id );
  63
  64     p_mi->i_input_id = -1;
  65
  66     if( !p_input_thread )
  67         return;
  68
  69     /* release for previous vlc_object_get */
  70     vlc_object_release( p_input_thread );
  71
  72     /* release for initial p_input_thread yield (see _new()) */
  73     vlc_object_release( p_input_thread );
  74
  75     /* No one is tracking this input_thread appart us. Destroy it */
  76     if( p_mi->b_own_its_input_thread )
  77     {
  78         /* We owned this one */
  79         input_StopThread( p_input_thread );
  80         var_Destroy( p_input_thread, "drawable" );
  81         input_DestroyThread( p_input_thread );
  82     }
  83     else
  84     {
  85         /* XXX: hack the playlist doesn't retain the input thread,
  86          * so we did it for the playlist (see _new_from_input_thread),
  87          * revert that here. This will be deleted with the playlist API */
  88         vlc_object_release( p_input_thread );
  89     }
  90 }
  91
  92 /*
  93  * Retrieve the input thread. Be sure to release the object
  94  * once you are done with it. (libvlc Internal)
  95  *
  96  * Object lock is held.
  97  */
  98 input_thread_t *libvlc_get_input_thread( libvlc_media_instance_t *p_mi,
  99                                          libvlc_exception_t *p_e )
 100 {
 101     input_thread_t *p_input_thread;
 102
 103     vlc_mutex_lock( &p_mi->object_lock );
 104
 105     if( !p_mi || p_mi->i_input_id == -1 )
 106     {
 107         vlc_mutex_unlock( &p_mi->object_lock );
 108         RAISENULL( "Input is NULL" );
 109     }
 110
 111     p_input_thread = (input_thread_t*)vlc_object_get(
 112                                              p_mi->p_libvlc_instance->p_libvlc_int,
 113                                              p_mi->i_input_id );
 114     if( !p_input_thread )
 115     {
 116         vlc_mutex_unlock( &p_mi->object_lock );
 117         RAISENULL( "Input does not exist" );
 118     }
 119
 120     vlc_mutex_unlock( &p_mi->object_lock );
 121     return p_input_thread;
 122 }
 123
 124 /*
 125  * input_state_changed (Private) (input var "state" Callback)
 126  */
 127 static int
 128 input_state_changed( vlc_object_t * p_this, char const * psz_cmd,
 129                      vlc_value_t oldval, vlc_value_t newval,
 130                      void * p_userdata )
 131 {
 132     libvlc_media_instance_t * p_mi = p_userdata;
 133     libvlc_event_t event;
 134     libvlc_event_type_t type = newval.i_int;
 135
 136     if( strcmp( psz_cmd, "state" ) )
 137         type = var_GetBool( p_this, "state" );
 138
 139     switch ( type )
 140     {
 141         case END_S:
 142             libvlc_media_descriptor_set_state( p_mi->p_md, libvlc_NothingSpecial, NULL);
 143             event.type = libvlc_MediaInstanceReachedEnd;
 144             break;
 145         case PAUSE_S:
 146             libvlc_media_descriptor_set_state( p_mi->p_md, libvlc_Playing, NULL);
 147             event.type = libvlc_MediaInstancePaused;
 148             break;
 149         case PLAYING_S:
 150             libvlc_media_descriptor_set_state( p_mi->p_md, libvlc_Playing, NULL);
 151             event.type = libvlc_MediaInstancePlayed;
 152             break;
 153         case ERROR_S:
 154             libvlc_media_descriptor_set_state( p_mi->p_md, libvlc_Error, NULL);
 155             event.type = libvlc_MediaInstanceReachedEnd; /* Because ERROR_S is buggy */
 156             break;
 157         default:
 158             return VLC_SUCCESS;
 159     }
 160
 161     libvlc_event_send( p_mi->p_event_manager, &event );
 162     return VLC_SUCCESS;
 163 }
 164
 165 /*
 166  * input_position_changed (Private) (input var "intf-change" Callback)
 167  */
 168 static int
 169 input_position_changed( vlc_object_t * p_this, char const * psz_cmd,
 170                      vlc_value_t oldval, vlc_value_t newval,
 171                      void * p_userdata )
 172 {
 173     libvlc_media_instance_t * p_mi = p_userdata;
 174     vlc_value_t val;
 175
 176     if (!strncmp(psz_cmd, "intf", 4 /* "-change" no need to go further */))
 177     {
 178         input_thread_t * p_input = (input_thread_t *)p_this;
 179
 180         var_Get( p_input, "state", &val );
 181         if( val.i_int != PLAYING_S )
 182             return VLC_SUCCESS; /* Don't send the position while stopped */
 183
 184         var_Get( p_input, "position", &val );
 185     }
 186     else
 187         val.i_time = newval.i_time;
 188
 189     libvlc_event_t event;
 190     event.type = libvlc_MediaInstancePositionChanged;
 191     event.u.media_instance_position_changed.new_position = val.f_float;
 192
 193     libvlc_event_send( p_mi->p_event_manager, &event );
 194     return VLC_SUCCESS;
 195 }
 196
 197 /*
 198  * input_time_changed (Private) (input var "intf-change" Callback)
 199  */
 200 static int
 201 input_time_changed( vlc_object_t * p_this, char const * psz_cmd,
 202                      vlc_value_t oldval, vlc_value_t newval,
 203                      void * p_userdata )
 204 {
 205     libvlc_media_instance_t * p_mi = p_userdata;
 206     vlc_value_t val;
 207
 208     if (!strncmp(psz_cmd, "intf", 4 /* "-change" no need to go further */))
 209     {
 210         input_thread_t * p_input = (input_thread_t *)p_this;
 211
 212         var_Get( p_input, "state", &val );
 213         if( val.i_int != PLAYING_S )
 214             return VLC_SUCCESS; /* Don't send the position while stopped */
 215
 216         var_Get( p_input, "time", &val );
 217     }
 218     else
 219         val.i_time = newval.i_time;
 220
 221     libvlc_event_t event;
 222     event.type = libvlc_MediaInstanceTimeChanged;
 223     event.u.media_instance_time_changed.new_time = val.i_time;
 224     libvlc_event_send( p_mi->p_event_manager, &event );
 225     return VLC_SUCCESS;
 226 }
 227
 228 /**************************************************************************
 229  * Create a Media Instance object
 230  **************************************************************************/
 231 libvlc_media_instance_t *
 232 libvlc_media_instance_new( libvlc_instance_t * p_libvlc_instance,
 233                            libvlc_exception_t * p_e )
 234 {
 235     libvlc_media_instance_t * p_mi;
 236
 237     if( !p_libvlc_instance )
 238     {
 239         libvlc_exception_raise( p_e, "invalid libvlc instance" );
 240         return NULL;
 241     }
 242
 243     p_mi = malloc( sizeof(libvlc_media_instance_t) );
 244     p_mi->p_md = NULL;
 245     p_mi->drawable = 0;
 246     p_mi->p_libvlc_instance = p_libvlc_instance;
 247     p_mi->i_input_id = -1;
 248     /* refcount strategy:
 249      * - All items created by _new start with a refcount set to 1
 250      * - Accessor _release decrease the refcount by 1, if after that
 251      *   operation the refcount is 0, the object is destroyed.
 252      * - Accessor _retain increase the refcount by 1 (XXX: to implement) */
 253     p_mi->i_refcount = 1;
 254     p_mi->b_own_its_input_thread = VLC_TRUE;
 255     /* object_lock strategy:
 256      * - No lock held in constructor
 257      * - Lock when accessing all variable this lock is held
 258      * - Lock when attempting to destroy the object the lock is also held */
 259     vlc_mutex_init( p_mi->p_libvlc_instance->p_libvlc_int,
 260                     &p_mi->object_lock );
 261     p_mi->p_event_manager = libvlc_event_manager_new( p_mi,
 262             p_libvlc_instance, p_e );
 263     if( libvlc_exception_raised( p_e ) )
 264     {
 265         free( p_mi );
 266         return NULL;
 267     }
 268
 269     libvlc_event_manager_register_event_type( p_mi->p_event_manager,
 270             libvlc_MediaInstanceReachedEnd, p_e );
 271     libvlc_event_manager_register_event_type( p_mi->p_event_manager,
 272             libvlc_MediaInstancePaused, p_e );
 273     libvlc_event_manager_register_event_type( p_mi->p_event_manager,
 274             libvlc_MediaInstancePlayed, p_e );
 275     libvlc_event_manager_register_event_type( p_mi->p_event_manager,
 276             libvlc_MediaInstancePositionChanged, p_e );
 277     libvlc_event_manager_register_event_type( p_mi->p_event_manager,
 278             libvlc_MediaInstanceTimeChanged, p_e );
 279
 280     return p_mi;
 281 }
 282
 283 /**************************************************************************
 284  * Create a Media Instance object with a media descriptor
 285  **************************************************************************/
 286 libvlc_media_instance_t *
 287 libvlc_media_instance_new_from_media_descriptor(
 288                                     libvlc_media_descriptor_t * p_md,
 289                                     libvlc_exception_t *p_e )
 290 {
 291     libvlc_media_instance_t * p_mi;
 292     p_mi = libvlc_media_instance_new( p_md->p_libvlc_instance, p_e );
 293
 294     if( !p_mi )
 295         return NULL;
 296
 297     libvlc_media_descriptor_retain( p_md );
 298     p_mi->p_md = p_md;
 299
 300     return p_mi;
 301 }
 302
 303 /**************************************************************************
 304  * Create a new media instance object from an input_thread (Libvlc Internal)
 305  **************************************************************************/
 306 libvlc_media_instance_t * libvlc_media_instance_new_from_input_thread(
 307                                    struct libvlc_instance_t *p_libvlc_instance,
 308                                    input_thread_t *p_input,
 309                                    libvlc_exception_t *p_e )
 310 {
 311     libvlc_media_instance_t * p_mi;
 312
 313     if( !p_input )
 314     {
 315         libvlc_exception_raise( p_e, "invalid input thread" );
 316         return NULL;
 317     }
 318
 319     p_mi = libvlc_media_instance_new( p_libvlc_instance, p_e );
 320
 321     if( !p_mi )
 322         return NULL;
 323
 324     p_mi->p_md = libvlc_media_descriptor_new_from_input_item(
 325                     p_libvlc_instance,
 326                     input_GetItem( p_input ), p_e );
 327
 328     if( !p_mi->p_md )
 329     {
 330         libvlc_media_instance_destroy( p_mi );
 331         return NULL;
 332     }
 333
 334     p_mi->i_input_id = p_input->i_object_id;
 335     p_mi->b_own_its_input_thread = VLC_FALSE;
 336
 337     /* will be released in media_instance_release() */
 338     vlc_object_yield( p_input );
 339
 340     /* XXX: Hack as the playlist doesn't yield the input thread we retain
 341      * the input for the playlist. (see corresponding hack in _release) */
 342     vlc_object_yield( p_input );
 343
 344     return p_mi;
 345 }
 346
 347 /**************************************************************************
 348  * Destroy a Media Instance object (libvlc internal)
 349  *
 350  * Warning: No lock held here, but hey, this is internal.
 351  **************************************************************************/
 352 void libvlc_media_instance_destroy( libvlc_media_instance_t *p_mi )
 353 {
 354     input_thread_t *p_input_thread;
 355     libvlc_exception_t p_e;
 356
 357     libvlc_exception_init( &p_e );
 358
 359     if( !p_mi )
 360         return;
 361
 362     p_input_thread = libvlc_get_input_thread( p_mi, &p_e );
 363
 364     if( libvlc_exception_raised( &p_e ) )
 365     {
 366         libvlc_event_manager_release( p_mi->p_event_manager );
 367         libvlc_exception_clear( &p_e );
 368         free( p_mi );
 369         return; /* no need to worry about no input thread */
 370     }
 371     vlc_mutex_destroy( &p_mi->object_lock );
 372
 373     input_DestroyThread( p_input_thread );
 374
 375     libvlc_media_descriptor_release( p_mi->p_md );
 376
 377     free( p_mi );
 378 }
 379
 380 /**************************************************************************
 381  * Release a Media Instance object
 382  **************************************************************************/
 383 void libvlc_media_instance_release( libvlc_media_instance_t *p_mi )
 384 {
 385     if( !p_mi )
 386         return;
 387
 388     vlc_mutex_lock( &p_mi->object_lock );
 389
 390     p_mi->i_refcount--;
 391
 392     if( p_mi->i_refcount > 0 )
 393     {
 394         vlc_mutex_unlock( &p_mi->object_lock );
 395         return;
 396     }
 397     vlc_mutex_unlock( &p_mi->object_lock );
 398     vlc_mutex_destroy( &p_mi->object_lock );
 399
 400     release_input_thread( p_mi );
 401
 402     libvlc_event_manager_release( p_mi->p_event_manager );
 403
 404     libvlc_media_descriptor_release( p_mi->p_md );
 405
 406     free( p_mi );
 407 }
 408
 409 /**************************************************************************
 410  * Retain a Media Instance object
 411  **************************************************************************/
 412 void libvlc_media_instance_retain( libvlc_media_instance_t *p_mi )
 413 {
 414     if( !p_mi )
 415         return;
 416
 417     p_mi->i_refcount++;
 418 }
 419
 420 /**************************************************************************
 421  * Set the Media descriptor associated with the instance
 422  **************************************************************************/
 423 void libvlc_media_instance_set_media_descriptor(
 424                             libvlc_media_instance_t *p_mi,
 425                             libvlc_media_descriptor_t *p_md,
 426                             libvlc_exception_t *p_e )
 427 {
 428     (void)p_e;
 429
 430     if( !p_mi )
 431         return;
 432
 433     vlc_mutex_lock( &p_mi->object_lock );
 434
 435     release_input_thread( p_mi );
 436
 437     libvlc_media_descriptor_release( p_mi->p_md );
 438
 439     if( !p_md )
 440     {
 441         p_mi->p_md = NULL;
 442         vlc_mutex_unlock( &p_mi->object_lock );
 443         return; /* It is ok to pass a NULL md */
 444     }
 445
 446     libvlc_media_descriptor_retain( p_md );
 447     p_mi->p_md = p_md;
 448
 449     /* The policy here is to ignore that we were created using a different
 450      * libvlc_instance, because we don't really care */
 451     p_mi->p_libvlc_instance = p_md->p_libvlc_instance;
 452
 453     vlc_mutex_unlock( &p_mi->object_lock );
 454 }
 455
 456 /**************************************************************************
 457  * Get the Media descriptor associated with the instance
 458  **************************************************************************/
 459 libvlc_media_descriptor_t *
 460 libvlc_media_instance_get_media_descriptor(
 461                             libvlc_media_instance_t *p_mi,
 462                             libvlc_exception_t *p_e )
 463 {
 464     (void)p_e;
 465
 466     if( !p_mi->p_md )
 467         return NULL;
 468
 469     libvlc_media_descriptor_retain( p_mi->p_md );
 470     return p_mi->p_md;
 471 }
 472
 473 /**************************************************************************
 474  * Get the event Manager
 475  **************************************************************************/
 476 libvlc_event_manager_t *
 477 libvlc_media_instance_event_manager(
 478                             libvlc_media_instance_t *p_mi,
 479                             libvlc_exception_t *p_e )
 480 {
 481     (void)p_e;
 482
 483     return p_mi->p_event_manager;
 484 }
 485
 486 /**************************************************************************
 487  * Play
 488  **************************************************************************/
 489 void libvlc_media_instance_play( libvlc_media_instance_t *p_mi,
 490                                  libvlc_exception_t *p_e )
 491 {
 492     input_thread_t * p_input_thread;
 493
 494     if( (p_input_thread = libvlc_get_input_thread( p_mi, p_e )) )
 495     {
 496         /* A thread alread exists, send it a play message */
 497         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 498         vlc_object_release( p_input_thread );
 499         return;
 500     }
 501
 502     /* Ignore previous exception */
 503     libvlc_exception_clear( p_e );
 504
 505     vlc_mutex_lock( &p_mi->object_lock );
 506
 507     if( !p_mi->p_md )
 508     {
 509         libvlc_exception_raise( p_e, "no associated media descriptor" );
 510         vlc_mutex_unlock( &p_mi->object_lock );
 511         return;
 512     }
 513
 514     p_mi->i_input_id = input_Read( p_mi->p_libvlc_instance->p_libvlc_int,
 515                                          p_mi->p_md->p_input_item, VLC_FALSE );
 516
 517     p_input_thread = libvlc_get_input_thread( p_mi, p_e ); /* Released in _release() */
 518
 519     if( p_mi->drawable )
 520     {
 521         vlc_value_t val;
 522         val.i_int = p_mi->drawable;
 523         var_Create( p_input_thread, "drawable", VLC_VAR_DOINHERIT );
 524         var_Set( p_input_thread, "drawable", val );
 525     }
 526     var_AddCallback( p_input_thread, "state", input_state_changed, p_mi );
 527     var_AddCallback( p_input_thread, "seekable", input_state_changed, p_mi );
 528     var_AddCallback( p_input_thread, "pausable", input_state_changed, p_mi );
 529     var_AddCallback( p_input_thread, "intf-change", input_position_changed, p_mi );
 530     var_AddCallback( p_input_thread, "intf-change", input_time_changed, p_mi );
 531
 532     vlc_mutex_unlock( &p_mi->object_lock );
 533 }
 534
 535 /**************************************************************************
 536  * Pause
 537  **************************************************************************/
 538 void libvlc_media_instance_pause( libvlc_media_instance_t *p_mi,
 539                                   libvlc_exception_t *p_e )
 540 {
 541     input_thread_t * p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 542
 543     if( !p_input_thread )
 544         return;
 545
 546     int state = var_GetInteger( p_input_thread, "state" );
 547
 548     if( state == PLAYING_S )
 549     {
 550         if( libvlc_media_instance_can_pause( p_mi, p_e ) )
 551             input_Control( p_input_thread, INPUT_SET_STATE, PAUSE_S );
 552         else
 553             libvlc_media_instance_stop( p_mi, p_e );
 554     }
 555     else
 556         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 557
 558     vlc_object_release( p_input_thread );
 559 }
 560
 561 /**************************************************************************
 562  * Stop
 563  **************************************************************************/
 564 void libvlc_media_instance_stop( libvlc_media_instance_t *p_mi,
 565                                  libvlc_exception_t *p_e )
 566 {
 567     if( p_mi->b_own_its_input_thread )
 568         release_input_thread( p_mi ); /* This will stop the input thread */
 569     else
 570     {
 571         input_thread_t * p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 572
 573         if( !p_input_thread )
 574             return;
 575
 576         input_StopThread( p_input_thread );
 577         vlc_object_release( p_input_thread );
 578     }
 579 }
 580
 581 /**************************************************************************
 582  * Set Drawable
 583  **************************************************************************/
 584 void libvlc_media_instance_set_drawable( libvlc_media_instance_t *p_mi,
 585                                          libvlc_drawable_t drawable,
 586                                          libvlc_exception_t *p_e )
 587 {
 588     p_mi->drawable = drawable;
 589 }
 590
 591 /**************************************************************************
 592  * Get Drawable
 593  **************************************************************************/
 594 libvlc_drawable_t
 595 libvlc_media_instance_get_drawable ( libvlc_media_instance_t *p_mi, libvlc_exception_t *p_e )
 596 {
 597     return p_mi->drawable;
 598 }
 599
 600 /**************************************************************************
 601  * Getters for stream information
 602  **************************************************************************/
 603 libvlc_time_t libvlc_media_instance_get_length(
 604                              libvlc_media_instance_t *p_mi,
 605                              libvlc_exception_t *p_e )
 606 {
 607     input_thread_t *p_input_thread;
 608     vlc_value_t val;
 609
 610     p_input_thread = libvlc_get_input_thread ( p_mi, p_e);
 611     if( !p_input_thread )
 612         return -1;
 613
 614     var_Get( p_input_thread, "length", &val );
 615     vlc_object_release( p_input_thread );
 616
 617     return (val.i_time+500LL)/1000LL;
 618 }
 619
 620 libvlc_time_t libvlc_media_instance_get_time(
 621                                    libvlc_media_instance_t *p_mi,
 622                                    libvlc_exception_t *p_e )
 623 {
 624     input_thread_t *p_input_thread;
 625     vlc_value_t val;
 626
 627     p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
 628     if( !p_input_thread )
 629         return -1;
 630
 631     var_Get( p_input_thread , "time", &val );
 632     vlc_object_release( p_input_thread );
 633     return (val.i_time+500LL)/1000LL;
 634 }
 635
 636 void libvlc_media_instance_set_time(
 637                                  libvlc_media_instance_t *p_mi,
 638                                  libvlc_time_t time,
 639                                  libvlc_exception_t *p_e )
 640 {
 641     input_thread_t *p_input_thread;
 642     vlc_value_t value;
 643
 644     p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
 645     if( !p_input_thread )
 646         return;
 647
 648     value.i_time = time*1000LL;
 649     var_Set( p_input_thread, "time", value );
 650     vlc_object_release( p_input_thread );
 651 }
 652
 653 void libvlc_media_instance_set_position(
 654                                 libvlc_media_instance_t *p_mi,
 655                                 float position,
 656                                 libvlc_exception_t *p_e )
 657 {
 658     input_thread_t *p_input_thread;
 659     vlc_value_t val;
 660     val.f_float = position;
 661
 662     p_input_thread = libvlc_get_input_thread ( p_mi, p_e);
 663     if( !p_input_thread )
 664         return;
 665
 666     var_Set( p_input_thread, "position", val );
 667     vlc_object_release( p_input_thread );
 668 }
 669
 670 float libvlc_media_instance_get_position(
 671                                  libvlc_media_instance_t *p_mi,
 672                                  libvlc_exception_t *p_e )
 673 {
 674     input_thread_t *p_input_thread;
 675     vlc_value_t val;
 676
 677     p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
 678     if( !p_input_thread )
 679         return -1.0;
 680
 681     var_Get( p_input_thread, "position", &val );
 682     vlc_object_release( p_input_thread );
 683
 684     return val.f_float;
 685 }
 686
 687 void libvlc_media_instance_set_chapter(
 688                                  libvlc_media_instance_t *p_mi,
 689                                  int chapter,
 690                                  libvlc_exception_t *p_e )
 691 {
 692     input_thread_t *p_input_thread;
 693     vlc_value_t val;
 694     val.i_int = chapter;
 695
 696     p_input_thread = libvlc_get_input_thread ( p_mi, p_e);
 697     if( !p_input_thread )
 698         return;
 699
 700     var_Set( p_input_thread, "chapter", val );
 701     vlc_object_release( p_input_thread );
 702 }
 703
 704 int libvlc_media_instance_get_chapter(
 705                                  libvlc_media_instance_t *p_mi,
 706                                  libvlc_exception_t *p_e )
 707 {
 708     input_thread_t *p_input_thread;
 709     vlc_value_t val;
 710
 711     p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
 712     if( !p_input_thread )
 713         return -1.0;
 714
 715     var_Get( p_input_thread, "chapter", &val );
 716     vlc_object_release( p_input_thread );
 717
 718     return val.i_int;
 719 }
 720
 721 int libvlc_media_instance_get_chapter_count(
 722                                  libvlc_media_instance_t *p_mi,
 723                                  libvlc_exception_t *p_e )
 724 {
 725     input_thread_t *p_input_thread;
 726     vlc_value_t val;
 727
 728     p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
 729     if( !p_input_thread )
 730         return -1.0;
 731
 732     var_Change( p_input_thread, "chapter", VLC_VAR_CHOICESCOUNT, &val, NULL );
 733     vlc_object_release( p_input_thread );
 734
 735     return val.i_int;
 736 }
 737
 738 float libvlc_media_instance_get_fps(
 739                                  libvlc_media_instance_t *p_mi,
 740                                  libvlc_exception_t *p_e)
 741 {
 742     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
 743     double f_fps = 0.0;
 744
 745     if( p_input_thread )
 746     {
 747         if( input_Control( p_input_thread, INPUT_GET_VIDEO_FPS, &f_fps ) )
 748             f_fps = 0.0;
 749         vlc_object_release( p_input_thread );
 750     }
 751     return f_fps;
 752 }
 753
 754 vlc_bool_t libvlc_media_instance_will_play(
 755                                  libvlc_media_instance_t *p_mi,
 756                                  libvlc_exception_t *p_e)
 757 {
 758     input_thread_t *p_input_thread =
 759                             libvlc_get_input_thread ( p_mi, p_e);
 760     if ( !p_input_thread )
 761         return VLC_FALSE;
 762
 763     if ( !p_input_thread->b_die && !p_input_thread->b_dead )
 764     {
 765         vlc_object_release( p_input_thread );
 766         return VLC_TRUE;
 767     }
 768     vlc_object_release( p_input_thread );
 769     return VLC_FALSE;
 770 }
 771
 772 void libvlc_media_instance_set_rate(
 773                                  libvlc_media_instance_t *p_mi,
 774                                  float rate,
 775                                  libvlc_exception_t *p_e )
 776 {
 777     input_thread_t *p_input_thread;
 778     vlc_value_t val;
 779
 780     if( rate <= 0 )
 781         RAISEVOID( "Rate value is invalid" );
 782
 783     val.i_int = 1000.0f/rate;
 784
 785     p_input_thread = libvlc_get_input_thread ( p_mi, p_e);
 786     if ( !p_input_thread )
 787         return;
 788
 789     var_Set( p_input_thread, "rate", val );
 790     vlc_object_release( p_input_thread );
 791 }
 792
 793 float libvlc_media_instance_get_rate(
 794                                  libvlc_media_instance_t *p_mi,
 795                                  libvlc_exception_t *p_e )
 796 {
 797     input_thread_t *p_input_thread;
 798     vlc_value_t val;
 799
 800     p_input_thread = libvlc_get_input_thread ( p_mi, p_e);
 801     if ( !p_input_thread )
 802         return -1.0;
 803
 804     var_Get( p_input_thread, "rate", &val );
 805     vlc_object_release( p_input_thread );
 806
 807     return (float)1000.0f/val.i_int;
 808 }
 809
 810 libvlc_state_t libvlc_media_instance_get_state(
 811                                  libvlc_media_instance_t *p_mi,
 812                                  libvlc_exception_t *p_e )
 813 {
 814     input_thread_t *p_input_thread;
 815     vlc_value_t val;
 816
 817     p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
 818     if ( !p_input_thread )
 819     {
 820         /* We do return the right value, no need to throw an exception */
 821         if( libvlc_exception_raised( p_e ) )
 822             libvlc_exception_clear( p_e );
 823         return libvlc_Stopped;
 824     }
 825
 826     var_Get( p_input_thread, "state", &val );
 827     vlc_object_release( p_input_thread );
 828
 829     return vlc_to_libvlc_state(val.i_int);
 830 }
 831
 832 vlc_bool_t libvlc_media_instance_is_seekable(
 833                                  libvlc_media_instance_t *p_mi,
 834                                  libvlc_exception_t *p_e )
 835 {
 836     input_thread_t *p_input_thread;
 837     vlc_value_t val;
 838
 839     p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
 840     if ( !p_input_thread )
 841     {
 842         /* We do return the right value, no need to throw an exception */
 843         if( libvlc_exception_raised( p_e ) )
 844             libvlc_exception_clear( p_e );
 845         return VLC_FALSE;
 846     }
 847     var_Get( p_input_thread, "seekable", &val );
 848     vlc_object_release( p_input_thread );
 849
 850     return val.b_bool;
 851 }
 852
 853 vlc_bool_t libvlc_media_instance_can_pause(
 854                                  libvlc_media_instance_t *p_mi,
 855                                  libvlc_exception_t *p_e )
 856 {
 857     input_thread_t *p_input_thread;
 858     vlc_value_t val;
 859
 860     p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
 861     if ( !p_input_thread )
 862     {
 863         /* We do return the right value, no need to throw an exception */
 864         if( libvlc_exception_raised( p_e ) )
 865             libvlc_exception_clear( p_e );
 866         return VLC_FALSE;
 867     }
 868     var_Get( p_input_thread, "can-pause", &val );
 869     vlc_object_release( p_input_thread );
 870
 871     return val.b_bool;
 872 }