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

   1 /*****************************************************************************
   2  * media_player.c: Libvlc API Media Instance management functions
   3  *****************************************************************************
   4  * Copyright (C) 2005-2009 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 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include <assert.h>
  29
  30 #include <vlc/libvlc.h>
  31 #include <vlc/libvlc_media.h>
  32 #include <vlc/libvlc_events.h>
  33
  34 #include <vlc_demux.h>
  35 #include <vlc_input.h>
  36 #include <vlc_vout.h>
  37
  38 #include "libvlc.h"
  39
  40 #include "libvlc_internal.h"
  41 #include "media_internal.h" // libvlc_media_set_state()
  42 #include "media_player_internal.h"
  43
  44 static int
  45 input_seekable_changed( vlc_object_t * p_this, char const * psz_cmd,
  46                         vlc_value_t oldval, vlc_value_t newval,
  47                         void * p_userdata );
  48 static int
  49 input_pausable_changed( vlc_object_t * p_this, char const * psz_cmd,
  50                         vlc_value_t oldval, vlc_value_t newval,
  51                         void * p_userdata );
  52 static int
  53 input_event_changed( vlc_object_t * p_this, char const * psz_cmd,
  54                      vlc_value_t oldval, vlc_value_t newval,
  55                      void * p_userdata );
  56
  57 static int
  58 snapshot_was_taken( vlc_object_t *p_this, char const *psz_cmd,
  59                     vlc_value_t oldval, vlc_value_t newval, void *p_data );
  60
  61 static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi );
  62
  63 /*
  64  * Shortcuts
  65  */
  66
  67 #define register_event(a, b) __register_event(a, libvlc_MediaPlayer ## b)
  68 static inline void __register_event(libvlc_media_player_t *mp, libvlc_event_type_t type)
  69 {
  70     libvlc_event_manager_register_event_type(mp->p_event_manager, type);
  71 }
  72
  73 /*
  74  * The input lock protects the input and input resource pointer.
  75  * It MUST NOT be used from callbacks.
  76  *
  77  * The object lock protects the reset, namely the media and the player state.
  78  * It can, and usually needs to be taken from callbacks.
  79  * The object lock can be acquired under the input lock... and consequently
  80  * the opposite order is STRICTLY PROHIBITED.
  81  */
  82 static inline void lock(libvlc_media_player_t *mp)
  83 {
  84     vlc_mutex_lock(&mp->object_lock);
  85 }
  86
  87 static inline void unlock(libvlc_media_player_t *mp)
  88 {
  89     vlc_mutex_unlock(&mp->object_lock);
  90 }
  91
  92 static inline void lock_input(libvlc_media_player_t *mp)
  93 {
  94     vlc_mutex_lock(&mp->input.lock);
  95 }
  96
  97 static inline void unlock_input(libvlc_media_player_t *mp)
  98 {
  99     vlc_mutex_unlock(&mp->input.lock);
 100 }
 101
 102 /*
 103  * Release the associated input thread.
 104  *
 105  * Object lock is NOT held.
 106  * Input lock is held or instance is being destroyed.
 107  */
 108 static void release_input_thread( libvlc_media_player_t *p_mi, bool b_input_abort )
 109 {
 110     assert( p_mi );
 111
 112     input_thread_t *p_input_thread = p_mi->input.p_thread;
 113     if( !p_input_thread )
 114         return;
 115
 116     var_DelCallback( p_input_thread, "can-seek",
 117                      input_seekable_changed, p_mi );
 118     var_DelCallback( p_input_thread, "can-pause",
 119                     input_pausable_changed, p_mi );
 120     var_DelCallback( p_input_thread, "intf-event",
 121                      input_event_changed, p_mi );
 122
 123     /* We owned this one */
 124     input_Stop( p_input_thread, b_input_abort );
 125
 126     vlc_thread_join( p_input_thread );
 127
 128     assert( p_input_thread->b_dead );
 129
 130     p_mi->input.p_thread = NULL;
 131     vlc_object_release( p_input_thread );
 132 }
 133
 134 /*
 135  * Retrieve the input thread. Be sure to release the object
 136  * once you are done with it. (libvlc Internal)
 137  */
 138 input_thread_t *libvlc_get_input_thread( libvlc_media_player_t *p_mi )
 139 {
 140     input_thread_t *p_input_thread;
 141
 142     assert( p_mi );
 143
 144     lock_input(p_mi);
 145     p_input_thread = p_mi->input.p_thread;
 146     if( p_input_thread )
 147         vlc_object_hold( p_input_thread );
 148     else
 149         libvlc_printerr( "No active input" );
 150     unlock_input(p_mi);
 151
 152     return p_input_thread;
 153 }
 154
 155 /*
 156  * Set the internal state of the media_player. (media player Internal)
 157  *
 158  * Function will lock the media_player.
 159  */
 160 static void set_state( libvlc_media_player_t *p_mi, libvlc_state_t state,
 161     bool b_locked )
 162 {
 163     if(!b_locked)
 164         lock(p_mi);
 165     p_mi->state = state;
 166
 167     libvlc_media_t *media = p_mi->p_md;
 168     if (media)
 169         libvlc_media_retain(media);
 170
 171     if(!b_locked)
 172         unlock(p_mi);
 173
 174     if (media)
 175     {
 176         // Also set the state of the corresponding media
 177         // This is strictly for convenience.
 178         libvlc_media_set_state(media, state);
 179
 180         libvlc_media_release(media);
 181     }
 182 }
 183
 184 static int
 185 input_seekable_changed( vlc_object_t * p_this, char const * psz_cmd,
 186                         vlc_value_t oldval, vlc_value_t newval,
 187                         void * p_userdata )
 188 {
 189     VLC_UNUSED(oldval);
 190     VLC_UNUSED(p_this);
 191     VLC_UNUSED(psz_cmd);
 192     libvlc_media_player_t * p_mi = p_userdata;
 193     libvlc_event_t event;
 194
 195     event.type = libvlc_MediaPlayerSeekableChanged;
 196     event.u.media_player_seekable_changed.new_seekable = newval.b_bool;
 197
 198     libvlc_event_send( p_mi->p_event_manager, &event );
 199     return VLC_SUCCESS;
 200 }
 201
 202 static int
 203 input_pausable_changed( vlc_object_t * p_this, char const * psz_cmd,
 204                         vlc_value_t oldval, vlc_value_t newval,
 205                         void * p_userdata )
 206 {
 207     VLC_UNUSED(oldval);
 208     VLC_UNUSED(p_this);
 209     VLC_UNUSED(psz_cmd);
 210     libvlc_media_player_t * p_mi = p_userdata;
 211     libvlc_event_t event;
 212
 213     event.type = libvlc_MediaPlayerPausableChanged;
 214     event.u.media_player_pausable_changed.new_pausable = newval.b_bool;
 215
 216     libvlc_event_send( p_mi->p_event_manager, &event );
 217     return VLC_SUCCESS;
 218 }
 219
 220 static int
 221 input_event_changed( vlc_object_t * p_this, char const * psz_cmd,
 222                      vlc_value_t oldval, vlc_value_t newval,
 223                      void * p_userdata )
 224 {
 225     VLC_UNUSED(oldval);
 226     input_thread_t * p_input = (input_thread_t *)p_this;
 227     libvlc_media_player_t * p_mi = p_userdata;
 228     libvlc_event_t event;
 229
 230     assert( !strcmp( psz_cmd, "intf-event" ) );
 231
 232     if( newval.i_int == INPUT_EVENT_STATE )
 233     {
 234         libvlc_state_t libvlc_state;
 235
 236         switch ( var_GetInteger( p_input, "state" ) )
 237         {
 238             case INIT_S:
 239                 libvlc_state = libvlc_NothingSpecial;
 240                 event.type = libvlc_MediaPlayerNothingSpecial;
 241                 break;
 242             case OPENING_S:
 243                 libvlc_state = libvlc_Opening;
 244                 event.type = libvlc_MediaPlayerOpening;
 245                 break;
 246             case PLAYING_S:
 247                 libvlc_state = libvlc_Playing;
 248                 event.type = libvlc_MediaPlayerPlaying;
 249                 break;
 250             case PAUSE_S:
 251                 libvlc_state = libvlc_Paused;
 252                 event.type = libvlc_MediaPlayerPaused;
 253                 break;
 254             case END_S:
 255                 libvlc_state = libvlc_Ended;
 256                 event.type = libvlc_MediaPlayerEndReached;
 257                 break;
 258             case ERROR_S:
 259                 libvlc_state = libvlc_Error;
 260                 event.type = libvlc_MediaPlayerEncounteredError;
 261                 break;
 262
 263             default:
 264                 return VLC_SUCCESS;
 265         }
 266
 267         set_state( p_mi, libvlc_state, false );
 268         libvlc_event_send( p_mi->p_event_manager, &event );
 269     }
 270     else if( newval.i_int == INPUT_EVENT_ABORT )
 271     {
 272         libvlc_state_t libvlc_state = libvlc_Stopped;
 273         event.type = libvlc_MediaPlayerStopped;
 274
 275         set_state( p_mi, libvlc_state, false );
 276         libvlc_event_send( p_mi->p_event_manager, &event );
 277     }
 278     else if( newval.i_int == INPUT_EVENT_POSITION )
 279     {
 280         if( var_GetInteger( p_input, "state" ) != PLAYING_S )
 281             return VLC_SUCCESS; /* Don't send the position while stopped */
 282
 283         /* */
 284         event.type = libvlc_MediaPlayerPositionChanged;
 285         event.u.media_player_position_changed.new_position =
 286                                           var_GetFloat( p_input, "position" );
 287         libvlc_event_send( p_mi->p_event_manager, &event );
 288
 289         /* */
 290         event.type = libvlc_MediaPlayerTimeChanged;
 291         event.u.media_player_time_changed.new_time =
 292            from_mtime(var_GetTime( p_input, "time" ));
 293         libvlc_event_send( p_mi->p_event_manager, &event );
 294     }
 295     else if( newval.i_int == INPUT_EVENT_LENGTH )
 296     {
 297         event.type = libvlc_MediaPlayerLengthChanged;
 298         event.u.media_player_length_changed.new_length =
 299            from_mtime(var_GetTime( p_input, "length" ));
 300         libvlc_event_send( p_mi->p_event_manager, &event );
 301     }
 302
 303     return VLC_SUCCESS;
 304
 305 }
 306
 307 /**************************************************************************
 308  * Snapshot Taken Event.
 309  *
 310  * FIXME: This snapshot API interface makes no sense in media_player.
 311  *************************************************************************/
 312 static int snapshot_was_taken(vlc_object_t *p_this, char const *psz_cmd,
 313                               vlc_value_t oldval, vlc_value_t newval, void *p_data )
 314 {
 315     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_this);
 316
 317     libvlc_media_player_t *mp = p_data;
 318     libvlc_event_t event;
 319     event.type = libvlc_MediaPlayerSnapshotTaken;
 320     event.u.media_player_snapshot_taken.psz_filename = newval.psz_string;
 321     libvlc_event_send(mp->p_event_manager, &event);
 322
 323     return VLC_SUCCESS;
 324 }
 325
 326 static input_thread_t *find_input (vlc_object_t *obj)
 327 {
 328     libvlc_media_player_t *mp = (libvlc_media_player_t *)obj;
 329
 330     return libvlc_get_input_thread (mp);
 331 }
 332
 333 /* */
 334 static void libvlc_media_player_destroy( libvlc_media_player_t * );
 335
 336
 337 /**************************************************************************
 338  * Create a Media Instance object.
 339  *
 340  * Refcount strategy:
 341  * - All items created by _new start with a refcount set to 1.
 342  * - Accessor _release decrease the refcount by 1, if after that
 343  *   operation the refcount is 0, the object is destroyed.
 344  * - Accessor _retain increase the refcount by 1 (XXX: to implement)
 345  *
 346  * Object locking strategy:
 347  * - No lock held while in constructor.
 348  * - When accessing any member variable this lock is held. (XXX who locks?)
 349  * - When attempting to destroy the object the lock is also held.
 350  **************************************************************************/
 351 libvlc_media_player_t *
 352 libvlc_media_player_new( libvlc_instance_t *instance )
 353 {
 354     libvlc_media_player_t * mp;
 355
 356     assert(instance);
 357
 358     mp = vlc_object_create (instance->p_libvlc_int, sizeof(*mp));
 359     if (unlikely(mp == NULL))
 360     {
 361         libvlc_printerr("Not enough memory");
 362         return NULL;
 363     }
 364     vlc_object_attach (mp, mp->p_libvlc);
 365
 366     /* Input */
 367     var_Create (mp, "rate", VLC_VAR_FLOAT|VLC_VAR_DOINHERIT);
 368
 369     /* Video */
 370     var_Create (mp, "drawable-xid", VLC_VAR_INTEGER);
 371 #ifdef WIN32
 372     var_Create (mp, "drawable-hwnd", VLC_VAR_ADDRESS);
 373 #endif
 374 #ifdef __APPLE__
 375     var_Create (mp, "drawable-agl", VLC_VAR_INTEGER);
 376     var_Create (mp, "drawable-nsobject", VLC_VAR_ADDRESS);
 377 #endif
 378
 379     var_Create (mp, "keyboard-events", VLC_VAR_BOOL);
 380     var_SetBool (mp, "keyboard-events", true);
 381     var_Create (mp, "mouse-events", VLC_VAR_BOOL);
 382     var_SetBool (mp, "mouse-events", true);
 383
 384     var_Create (mp, "fullscreen", VLC_VAR_BOOL);
 385     var_Create (mp, "autoscale", VLC_VAR_BOOL);
 386     var_SetBool (mp, "autoscale", true);
 387     var_Create (mp, "scale", VLC_VAR_FLOAT);
 388     var_SetFloat (mp, "scale", 1.);
 389     var_Create (mp, "aspect-ratio", VLC_VAR_STRING);
 390     var_Create (mp, "crop", VLC_VAR_STRING);
 391     var_Create (mp, "deinterlace", VLC_VAR_INTEGER);
 392     var_Create (mp, "deinterlace-mode", VLC_VAR_STRING);
 393
 394     var_Create (mp, "vbi-page", VLC_VAR_INTEGER);
 395
 396     var_Create (mp, "marq-marquee", VLC_VAR_STRING);
 397     var_Create (mp, "marq-color", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 398     var_Create (mp, "marq-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 399     var_Create (mp, "marq-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 400     var_Create (mp, "marq-refresh", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 401     var_Create (mp, "marq-size", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 402     var_Create (mp, "marq-timeout", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 403     var_Create (mp, "marq-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 404     var_Create (mp, "marq-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 405
 406     var_Create (mp, "logo-file", VLC_VAR_STRING);
 407     var_Create (mp, "logo-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 408     var_Create (mp, "logo-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 409     var_Create (mp, "logo-delay", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 410     var_Create (mp, "logo-repeat", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 411     var_Create (mp, "logo-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 412     var_Create (mp, "logo-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 413
 414      /* Audio */
 415     var_Create (mp, "aout", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 416     var_Create (mp, "volume-muted", VLC_VAR_BOOL);
 417     var_Create (mp, "saved-volume", VLC_VAR_INTEGER);
 418     var_Create (mp, "volume-change", VLC_VAR_VOID);
 419     var_Create (mp, "find-input-callback", VLC_VAR_ADDRESS);
 420     var_SetAddress (mp, "find-input-callback", find_input);
 421
 422     mp->p_md = NULL;
 423     mp->state = libvlc_NothingSpecial;
 424     mp->p_libvlc_instance = instance;
 425     mp->input.p_thread = NULL;
 426     mp->input.p_resource = NULL;
 427     vlc_mutex_init (&mp->input.lock);
 428     mp->i_refcount = 1;
 429     mp->p_event_manager = libvlc_event_manager_new(mp, instance);
 430     if (unlikely(mp->p_event_manager == NULL))
 431     {
 432         vlc_object_release(mp);
 433         return NULL;
 434     }
 435     vlc_mutex_init(&mp->object_lock);
 436
 437     register_event(mp, NothingSpecial);
 438     register_event(mp, Opening);
 439     register_event(mp, Buffering);
 440     register_event(mp, Playing);
 441     register_event(mp, Paused);
 442     register_event(mp, Stopped);
 443     register_event(mp, Forward);
 444     register_event(mp, Backward);
 445     register_event(mp, EndReached);
 446     register_event(mp, EncounteredError);
 447     register_event(mp, SeekableChanged);
 448
 449     register_event(mp, PositionChanged);
 450     register_event(mp, TimeChanged);
 451     register_event(mp, LengthChanged);
 452     register_event(mp, TitleChanged);
 453     register_event(mp, PausableChanged);
 454
 455     /* Snapshot initialization */
 456     register_event(mp, SnapshotTaken);
 457
 458     register_event(mp, MediaChanged);
 459
 460     /* Attach a var callback to the global object to provide the glue between
 461      * vout_thread that generates the event and media_player that re-emits it
 462      * with its own event manager
 463      *
 464      * FIXME: It's unclear why we want to put this in public API, and why we
 465      * want to expose it in such a limiting and ugly way.
 466      */
 467     var_AddCallback(mp->p_libvlc, "snapshot-file", snapshot_was_taken, mp);
 468
 469     libvlc_retain(instance);
 470     return mp;
 471 }
 472
 473 /**************************************************************************
 474  * Create a Media Instance object with a media descriptor.
 475  **************************************************************************/
 476 libvlc_media_player_t *
 477 libvlc_media_player_new_from_media( libvlc_media_t * p_md )
 478 {
 479     libvlc_media_player_t * p_mi;
 480
 481     p_mi = libvlc_media_player_new( p_md->p_libvlc_instance );
 482     if( !p_mi )
 483         return NULL;
 484
 485     libvlc_media_retain( p_md );
 486     p_mi->p_md = p_md;
 487
 488     return p_mi;
 489 }
 490
 491 /**************************************************************************
 492  * Destroy a Media Instance object (libvlc internal)
 493  *
 494  * Warning: No lock held here, but hey, this is internal. Caller must lock.
 495  **************************************************************************/
 496 static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi )
 497 {
 498     assert( p_mi );
 499
 500     /* Detach Callback from the main libvlc object */
 501     var_DelCallback( p_mi->p_libvlc,
 502                      "snapshot-file", snapshot_was_taken, p_mi );
 503
 504     /* No need for lock_input() because no other threads knows us anymore */
 505     if( p_mi->input.p_thread )
 506         release_input_thread(p_mi, true);
 507     if( p_mi->input.p_resource )
 508     {
 509         input_resource_Delete( p_mi->input.p_resource );
 510         p_mi->input.p_resource = NULL;
 511     }
 512     vlc_mutex_destroy( &p_mi->input.lock );
 513
 514     libvlc_event_manager_release( p_mi->p_event_manager );
 515     libvlc_media_release( p_mi->p_md );
 516     vlc_mutex_destroy( &p_mi->object_lock );
 517
 518     libvlc_instance_t *instance = p_mi->p_libvlc_instance;
 519     vlc_object_release( p_mi );
 520     libvlc_release(instance);
 521 }
 522
 523 /**************************************************************************
 524  * Release a Media Instance object.
 525  *
 526  * Function does the locking.
 527  **************************************************************************/
 528 void libvlc_media_player_release( libvlc_media_player_t *p_mi )
 529 {
 530     bool destroy;
 531
 532     assert( p_mi );
 533     lock(p_mi);
 534     destroy = !--p_mi->i_refcount;
 535     unlock(p_mi);
 536
 537     if( destroy )
 538         libvlc_media_player_destroy( p_mi );
 539 }
 540
 541 /**************************************************************************
 542  * Retain a Media Instance object.
 543  *
 544  * Caller must hold the lock.
 545  **************************************************************************/
 546 void libvlc_media_player_retain( libvlc_media_player_t *p_mi )
 547 {
 548     assert( p_mi );
 549
 550     lock(p_mi);
 551     p_mi->i_refcount++;
 552     unlock(p_mi);
 553 }
 554
 555 /**************************************************************************
 556  * Set the Media descriptor associated with the instance.
 557  *
 558  * Enter without lock -- function will lock the object.
 559  **************************************************************************/
 560 void libvlc_media_player_set_media(
 561                             libvlc_media_player_t *p_mi,
 562                             libvlc_media_t *p_md )
 563 {
 564     lock_input(p_mi);
 565
 566     /* FIXME I am not sure if it is a user request or on die(eof/error)
 567      * request here */
 568     release_input_thread( p_mi,
 569                           p_mi->input.p_thread &&
 570                           !p_mi->input.p_thread->b_eof &&
 571                           !p_mi->input.p_thread->b_error );
 572
 573     lock( p_mi );
 574     set_state( p_mi, libvlc_NothingSpecial, true );
 575     unlock_input( p_mi );
 576
 577     libvlc_media_release( p_mi->p_md );
 578
 579     if( !p_md )
 580     {
 581         p_mi->p_md = NULL;
 582         unlock(p_mi);
 583         return; /* It is ok to pass a NULL md */
 584     }
 585
 586     libvlc_media_retain( p_md );
 587     p_mi->p_md = p_md;
 588
 589     /* The policy here is to ignore that we were created using a different
 590      * libvlc_instance, because we don't really care */
 591     p_mi->p_libvlc_instance = p_md->p_libvlc_instance;
 592
 593     unlock(p_mi);
 594
 595     /* Send an event for the newly available media */
 596     libvlc_event_t event;
 597     event.type = libvlc_MediaPlayerMediaChanged;
 598     event.u.media_player_media_changed.new_media = p_md;
 599     libvlc_event_send( p_mi->p_event_manager, &event );
 600
 601 }
 602
 603 /**************************************************************************
 604  * Get the Media descriptor associated with the instance.
 605  **************************************************************************/
 606 libvlc_media_t *
 607 libvlc_media_player_get_media( libvlc_media_player_t *p_mi )
 608 {
 609     libvlc_media_t *p_m;
 610
 611     lock(p_mi);
 612     p_m = p_mi->p_md;
 613     if( p_m )
 614         libvlc_media_retain( p_mi->p_md );
 615     unlock(p_mi);
 616     return p_mi->p_md;
 617 }
 618
 619 /**************************************************************************
 620  * Get the event Manager.
 621  **************************************************************************/
 622 libvlc_event_manager_t *
 623 libvlc_media_player_event_manager( libvlc_media_player_t *p_mi )
 624 {
 625     return p_mi->p_event_manager;
 626 }
 627
 628 /**************************************************************************
 629  * Tell media player to start playing.
 630  **************************************************************************/
 631 int libvlc_media_player_play( libvlc_media_player_t *p_mi )
 632 {
 633     lock_input( p_mi );
 634
 635     input_thread_t *p_input_thread = p_mi->input.p_thread;
 636     if( p_input_thread )
 637     {
 638         /* A thread already exists, send it a play message */
 639         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 640         unlock_input( p_mi );
 641         return 0;
 642     }
 643
 644     /* Ignore previous exception */
 645     lock(p_mi);
 646
 647     if( !p_mi->p_md )
 648     {
 649         unlock(p_mi);
 650         unlock_input( p_mi );
 651         libvlc_printerr( "No associated media descriptor" );
 652         return -1;
 653     }
 654
 655     if( !p_mi->input.p_resource )
 656         p_mi->input.p_resource = input_resource_New( VLC_OBJECT( p_mi ) );
 657     p_input_thread = input_Create( p_mi, p_mi->p_md->p_input_item, NULL,
 658                                    p_mi->input.p_resource );
 659     unlock(p_mi);
 660     if( !p_input_thread )
 661     {
 662         unlock_input(p_mi);
 663         libvlc_printerr( "Not enough memory" );
 664         return -1;
 665     }
 666
 667     var_AddCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 668     var_AddCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 669     var_AddCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 670
 671     if( input_Start( p_input_thread ) )
 672     {
 673         unlock_input(p_mi);
 674         var_DelCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 675         var_DelCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 676         var_DelCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 677         vlc_object_release( p_input_thread );
 678         libvlc_printerr( "Input initialization failure" );
 679         return -1;
 680     }
 681     p_mi->input.p_thread = p_input_thread;
 682     unlock_input(p_mi);
 683     return 0;
 684 }
 685
 686 /**************************************************************************
 687  * Pause.
 688  **************************************************************************/
 689 void libvlc_media_player_pause( libvlc_media_player_t *p_mi )
 690 {
 691     input_thread_t * p_input_thread = libvlc_get_input_thread( p_mi );
 692     if( !p_input_thread )
 693         return;
 694
 695     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 696     if( state == libvlc_Playing || state == libvlc_Buffering )
 697     {
 698         if( libvlc_media_player_can_pause( p_mi ) )
 699             input_Control( p_input_thread, INPUT_SET_STATE, PAUSE_S );
 700         else
 701             libvlc_media_player_stop( p_mi );
 702     }
 703     else
 704         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 705
 706     vlc_object_release( p_input_thread );
 707 }
 708
 709 /**************************************************************************
 710  * Tells whether the media player is currently playing.
 711  *
 712  * Enter with lock held.
 713  **************************************************************************/
 714 int libvlc_media_player_is_playing( libvlc_media_player_t *p_mi )
 715 {
 716     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 717     return (libvlc_Playing == state) || (libvlc_Buffering == state);
 718 }
 719
 720 /**************************************************************************
 721  * Stop playing.
 722  **************************************************************************/
 723 void libvlc_media_player_stop( libvlc_media_player_t *p_mi )
 724 {
 725     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 726
 727     lock_input(p_mi);
 728     release_input_thread( p_mi, true ); /* This will stop the input thread */
 729
 730     /* Force to go to stopped state, in case we were in Ended, or Error
 731      * state. */
 732     if( state != libvlc_Stopped )
 733     {
 734         set_state( p_mi, libvlc_Stopped, false );
 735
 736         /* Construct and send the event */
 737         libvlc_event_t event;
 738         event.type = libvlc_MediaPlayerStopped;
 739         libvlc_event_send( p_mi->p_event_manager, &event );
 740     }
 741     unlock_input(p_mi);
 742 }
 743
 744 /**************************************************************************
 745  * set_nsobject
 746  **************************************************************************/
 747 void libvlc_media_player_set_nsobject( libvlc_media_player_t *p_mi,
 748                                         void * drawable )
 749 {
 750     assert (p_mi != NULL);
 751 #ifdef __APPLE__
 752     var_SetAddress (p_mi, "drawable-nsobject", drawable);
 753 #else
 754     (void) p_mi; (void)drawable;
 755 #endif
 756 }
 757
 758 /**************************************************************************
 759  * get_nsobject
 760  **************************************************************************/
 761 void * libvlc_media_player_get_nsobject( libvlc_media_player_t *p_mi )
 762 {
 763     assert (p_mi != NULL);
 764 #ifdef __APPLE__
 765     return var_GetAddress (p_mi, "drawable-nsobject");
 766 #else
 767     return NULL;
 768 #endif
 769 }
 770
 771 /**************************************************************************
 772  * set_agl
 773  **************************************************************************/
 774 void libvlc_media_player_set_agl( libvlc_media_player_t *p_mi,
 775                                   uint32_t drawable )
 776 {
 777 #ifdef __APPLE__
 778     var_SetInteger (p_mi, "drawable-agl", drawable);
 779 #else
 780     (void) p_mi; (void)drawable;
 781 #endif
 782 }
 783
 784 /**************************************************************************
 785  * get_agl
 786  **************************************************************************/
 787 uint32_t libvlc_media_player_get_agl( libvlc_media_player_t *p_mi )
 788 {
 789     assert (p_mi != NULL);
 790 #ifdef __APPLE__
 791     return var_GetInteger (p_mi, "drawable-agl");
 792 #else
 793     return 0;
 794 #endif
 795 }
 796
 797 /**************************************************************************
 798  * set_xwindow
 799  **************************************************************************/
 800 void libvlc_media_player_set_xwindow( libvlc_media_player_t *p_mi,
 801                                       uint32_t drawable )
 802 {
 803     assert (p_mi != NULL);
 804     var_SetInteger (p_mi, "drawable-xid", drawable);
 805 }
 806
 807 /**************************************************************************
 808  * get_xwindow
 809  **************************************************************************/
 810 uint32_t libvlc_media_player_get_xwindow( libvlc_media_player_t *p_mi )
 811 {
 812     return var_GetInteger (p_mi, "drawable-xid");
 813 }
 814
 815 /**************************************************************************
 816  * set_hwnd
 817  **************************************************************************/
 818 void libvlc_media_player_set_hwnd( libvlc_media_player_t *p_mi,
 819                                    void *drawable )
 820 {
 821     assert (p_mi != NULL);
 822 #ifdef WIN32
 823     var_SetAddress (p_mi, "drawable-hwnd", drawable);
 824 #else
 825     (void) p_mi; (void) drawable;
 826 #endif
 827 }
 828
 829 /**************************************************************************
 830  * get_hwnd
 831  **************************************************************************/
 832 void *libvlc_media_player_get_hwnd( libvlc_media_player_t *p_mi )
 833 {
 834     assert (p_mi != NULL);
 835 #ifdef WIN32
 836     return var_GetAddress (p_mi, "drawable-hwnd");
 837 #else
 838     return NULL;
 839 #endif
 840 }
 841
 842 /**************************************************************************
 843  * Getters for stream information
 844  **************************************************************************/
 845 libvlc_time_t libvlc_media_player_get_length(
 846                              libvlc_media_player_t *p_mi )
 847 {
 848     input_thread_t *p_input_thread;
 849     libvlc_time_t i_time;
 850
 851     p_input_thread = libvlc_get_input_thread ( p_mi );
 852     if( !p_input_thread )
 853         return -1;
 854
 855     i_time = from_mtime(var_GetTime( p_input_thread, "length" ));
 856     vlc_object_release( p_input_thread );
 857
 858     return i_time;
 859 }
 860
 861 libvlc_time_t libvlc_media_player_get_time( libvlc_media_player_t *p_mi )
 862 {
 863     input_thread_t *p_input_thread;
 864     libvlc_time_t i_time;
 865
 866     p_input_thread = libvlc_get_input_thread ( p_mi );
 867     if( !p_input_thread )
 868         return -1;
 869
 870     i_time = from_mtime(var_GetTime( p_input_thread , "time" ));
 871     vlc_object_release( p_input_thread );
 872     return i_time;
 873 }
 874
 875 void libvlc_media_player_set_time( libvlc_media_player_t *p_mi,
 876                                    libvlc_time_t i_time )
 877 {
 878     input_thread_t *p_input_thread;
 879
 880     p_input_thread = libvlc_get_input_thread ( p_mi );
 881     if( !p_input_thread )
 882         return;
 883
 884     var_SetTime( p_input_thread, "time", to_mtime(i_time) );
 885     vlc_object_release( p_input_thread );
 886 }
 887
 888 void libvlc_media_player_set_position( libvlc_media_player_t *p_mi,
 889                                        float position )
 890 {
 891     input_thread_t *p_input_thread;
 892
 893     p_input_thread = libvlc_get_input_thread ( p_mi );
 894     if( !p_input_thread )
 895         return;
 896
 897     var_SetFloat( p_input_thread, "position", position );
 898     vlc_object_release( p_input_thread );
 899 }
 900
 901 float libvlc_media_player_get_position( libvlc_media_player_t *p_mi )
 902 {
 903     input_thread_t *p_input_thread;
 904     float f_position;
 905
 906     p_input_thread = libvlc_get_input_thread ( p_mi );
 907     if( !p_input_thread )
 908         return -1.0;
 909
 910     f_position = var_GetFloat( p_input_thread, "position" );
 911     vlc_object_release( p_input_thread );
 912
 913     return f_position;
 914 }
 915
 916 void libvlc_media_player_set_chapter( libvlc_media_player_t *p_mi,
 917                                       int chapter )
 918 {
 919     input_thread_t *p_input_thread;
 920
 921     p_input_thread = libvlc_get_input_thread ( p_mi );
 922     if( !p_input_thread )
 923         return;
 924
 925     var_SetInteger( p_input_thread, "chapter", chapter );
 926     vlc_object_release( p_input_thread );
 927 }
 928
 929 int libvlc_media_player_get_chapter( libvlc_media_player_t *p_mi )
 930 {
 931     input_thread_t *p_input_thread;
 932     int i_chapter;
 933
 934     p_input_thread = libvlc_get_input_thread ( p_mi );
 935     if( !p_input_thread )
 936         return -1;
 937
 938     i_chapter = var_GetInteger( p_input_thread, "chapter" );
 939     vlc_object_release( p_input_thread );
 940
 941     return i_chapter;
 942 }
 943
 944 int libvlc_media_player_get_chapter_count( libvlc_media_player_t *p_mi )
 945 {
 946     input_thread_t *p_input_thread;
 947     vlc_value_t val;
 948
 949     p_input_thread = libvlc_get_input_thread ( p_mi );
 950     if( !p_input_thread )
 951         return -1;
 952
 953     var_Change( p_input_thread, "chapter", VLC_VAR_CHOICESCOUNT, &val, NULL );
 954     vlc_object_release( p_input_thread );
 955
 956     return val.i_int;
 957 }
 958
 959 int libvlc_media_player_get_chapter_count_for_title(
 960                                  libvlc_media_player_t *p_mi,
 961                                  int i_title )
 962 {
 963     input_thread_t *p_input_thread;
 964     vlc_value_t val;
 965
 966     p_input_thread = libvlc_get_input_thread ( p_mi );
 967     if( !p_input_thread )
 968         return -1;
 969
 970     char *psz_name;
 971     if( asprintf( &psz_name,  "title %2i", i_title ) == -1 )
 972     {
 973         vlc_object_release( p_input_thread );
 974         return -1;
 975     }
 976     var_Change( p_input_thread, psz_name, VLC_VAR_CHOICESCOUNT, &val, NULL );
 977     vlc_object_release( p_input_thread );
 978     free( psz_name );
 979
 980     return val.i_int;
 981 }
 982
 983 void libvlc_media_player_set_title( libvlc_media_player_t *p_mi,
 984                                     int i_title )
 985 {
 986     input_thread_t *p_input_thread;
 987
 988     p_input_thread = libvlc_get_input_thread ( p_mi );
 989     if( !p_input_thread )
 990         return;
 991
 992     var_SetInteger( p_input_thread, "title", i_title );
 993     vlc_object_release( p_input_thread );
 994
 995     //send event
 996     libvlc_event_t event;
 997     event.type = libvlc_MediaPlayerTitleChanged;
 998     event.u.media_player_title_changed.new_title = i_title;
 999     libvlc_event_send( p_mi->p_event_manager, &event );
1000 }
1001
1002 int libvlc_media_player_get_title( libvlc_media_player_t *p_mi )
1003 {
1004     input_thread_t *p_input_thread;
1005     int i_title;
1006
1007     p_input_thread = libvlc_get_input_thread ( p_mi );
1008     if( !p_input_thread )
1009         return -1;
1010
1011     i_title = var_GetInteger( p_input_thread, "title" );
1012     vlc_object_release( p_input_thread );
1013
1014     return i_title;
1015 }
1016
1017 int libvlc_media_player_get_title_count( libvlc_media_player_t *p_mi )
1018 {
1019     input_thread_t *p_input_thread;
1020     vlc_value_t val;
1021
1022     p_input_thread = libvlc_get_input_thread ( p_mi );
1023     if( !p_input_thread )
1024         return -1;
1025
1026     var_Change( p_input_thread, "title", VLC_VAR_CHOICESCOUNT, &val, NULL );
1027     vlc_object_release( p_input_thread );
1028
1029     return val.i_int;
1030 }
1031
1032 void libvlc_media_player_next_chapter( libvlc_media_player_t *p_mi )
1033 {
1034     input_thread_t *p_input_thread;
1035
1036     p_input_thread = libvlc_get_input_thread ( p_mi );
1037     if( !p_input_thread )
1038         return;
1039
1040     int i_type = var_Type( p_input_thread, "next-chapter" );
1041     var_SetBool( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1042                             "next-chapter":"next-title", true );
1043
1044     vlc_object_release( p_input_thread );
1045 }
1046
1047 void libvlc_media_player_previous_chapter( libvlc_media_player_t *p_mi )
1048 {
1049     input_thread_t *p_input_thread;
1050
1051     p_input_thread = libvlc_get_input_thread ( p_mi );
1052     if( !p_input_thread )
1053         return;
1054
1055     int i_type = var_Type( p_input_thread, "next-chapter" );
1056     var_SetBool( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1057                             "prev-chapter":"prev-title", true );
1058
1059     vlc_object_release( p_input_thread );
1060 }
1061
1062 float libvlc_media_player_get_fps( libvlc_media_player_t *p_mi )
1063 {
1064     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1065     double f_fps = 0.0;
1066
1067     if( p_input_thread )
1068     {
1069         if( input_Control( p_input_thread, INPUT_GET_VIDEO_FPS, &f_fps ) )
1070             f_fps = 0.0;
1071         vlc_object_release( p_input_thread );
1072     }
1073     return f_fps;
1074 }
1075
1076 int libvlc_media_player_will_play( libvlc_media_player_t *p_mi )
1077 {
1078     bool b_will_play;
1079     input_thread_t *p_input_thread =
1080                             libvlc_get_input_thread ( p_mi );
1081     if ( !p_input_thread )
1082         return false;
1083
1084     b_will_play = !p_input_thread->b_die && !p_input_thread->b_dead;
1085     vlc_object_release( p_input_thread );
1086
1087     return b_will_play;
1088 }
1089
1090 int libvlc_media_player_set_rate( libvlc_media_player_t *p_mi, float rate )
1091 {
1092     if (rate < 0.)
1093     {
1094         libvlc_printerr ("Playing backward not supported");
1095         return -1;
1096     }
1097
1098     var_SetFloat (p_mi, "rate", rate);
1099
1100     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1101     if( !p_input_thread )
1102         return 0;
1103     var_SetFloat( p_input_thread, "rate", rate );
1104     vlc_object_release( p_input_thread );
1105     return 0;
1106 }
1107
1108 float libvlc_media_player_get_rate( libvlc_media_player_t *p_mi )
1109 {
1110     return var_GetFloat (p_mi, "rate");
1111 }
1112
1113 libvlc_state_t libvlc_media_player_get_state( libvlc_media_player_t *p_mi )
1114 {
1115     lock(p_mi);
1116     libvlc_state_t state = p_mi->state;
1117     unlock(p_mi);
1118     return state;
1119 }
1120
1121 int libvlc_media_player_is_seekable( libvlc_media_player_t *p_mi )
1122 {
1123     input_thread_t *p_input_thread;
1124     bool b_seekable;
1125
1126     p_input_thread = libvlc_get_input_thread ( p_mi );
1127     if ( !p_input_thread )
1128         return false;
1129     b_seekable = var_GetBool( p_input_thread, "can-seek" );
1130     vlc_object_release( p_input_thread );
1131
1132     return b_seekable;
1133 }
1134
1135 /* internal function, used by audio, video */
1136 libvlc_track_description_t *
1137         libvlc_get_track_description( libvlc_media_player_t *p_mi,
1138                                       const char *psz_variable )
1139 {
1140     input_thread_t *p_input = libvlc_get_input_thread( p_mi );
1141     libvlc_track_description_t *p_track_description = NULL,
1142                                *p_actual, *p_previous;
1143
1144     if( !p_input )
1145         return NULL;
1146
1147     vlc_value_t val_list, text_list;
1148     var_Change( p_input, psz_variable, VLC_VAR_GETLIST, &val_list, &text_list);
1149
1150     /* no tracks */
1151     if( val_list.p_list->i_count <= 0 )
1152         goto end;
1153
1154     p_track_description = ( libvlc_track_description_t * )
1155         malloc( sizeof( libvlc_track_description_t ) );
1156     if ( !p_track_description )
1157     {
1158         libvlc_printerr( "Not enough memory" );
1159         goto end;
1160     }
1161     p_actual = p_track_description;
1162     p_previous = NULL;
1163     for( int i = 0; i < val_list.p_list->i_count; i++ )
1164     {
1165         if( !p_actual )
1166         {
1167             p_actual = ( libvlc_track_description_t * )
1168                 malloc( sizeof( libvlc_track_description_t ) );
1169             if ( !p_actual )
1170             {
1171                 libvlc_track_description_release( p_track_description );
1172                 libvlc_printerr( "Not enough memory" );
1173                 goto end;
1174             }
1175         }
1176         p_actual->i_id = val_list.p_list->p_values[i].i_int;
1177         p_actual->psz_name = strdup( text_list.p_list->p_values[i].psz_string );
1178         p_actual->p_next = NULL;
1179         if( p_previous )
1180             p_previous->p_next = p_actual;
1181         p_previous = p_actual;
1182         p_actual =  NULL;
1183     }
1184
1185 end:
1186     var_FreeList( &val_list, &text_list );
1187     vlc_object_release( p_input );
1188
1189     return p_track_description;
1190 }
1191
1192 void libvlc_track_description_release( libvlc_track_description_t *p_td )
1193 {
1194     libvlc_track_description_t *p_actual, *p_before;
1195     p_actual = p_td;
1196
1197     while ( p_actual )
1198     {
1199         free( p_actual->psz_name );
1200         p_before = p_actual;
1201         p_actual = p_before->p_next;
1202         free( p_before );
1203     }
1204 }
1205
1206 int libvlc_media_player_can_pause( libvlc_media_player_t *p_mi )
1207 {
1208     input_thread_t *p_input_thread;
1209     bool b_can_pause;
1210
1211     p_input_thread = libvlc_get_input_thread ( p_mi );
1212     if ( !p_input_thread )
1213         return false;
1214     b_can_pause = var_GetBool( p_input_thread, "can-pause" );
1215     vlc_object_release( p_input_thread );
1216
1217     return b_can_pause;
1218 }
1219
1220 void libvlc_media_player_next_frame( libvlc_media_player_t *p_mi )
1221 {
1222     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1223     if( p_input_thread != NULL )
1224     {
1225         var_TriggerCallback( p_input_thread, "frame-next" );
1226         vlc_object_release( p_input_thread );
1227     }
1228 }