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_Terminate( p_mi->input.p_resource );
 510         input_resource_Release( p_mi->input.p_resource );
 511         p_mi->input.p_resource = NULL;
 512     }
 513     vlc_mutex_destroy( &p_mi->input.lock );
 514
 515     libvlc_event_manager_release( p_mi->p_event_manager );
 516     libvlc_media_release( p_mi->p_md );
 517     vlc_mutex_destroy( &p_mi->object_lock );
 518
 519     libvlc_instance_t *instance = p_mi->p_libvlc_instance;
 520     vlc_object_release( p_mi );
 521     libvlc_release(instance);
 522 }
 523
 524 /**************************************************************************
 525  * Release a Media Instance object.
 526  *
 527  * Function does the locking.
 528  **************************************************************************/
 529 void libvlc_media_player_release( libvlc_media_player_t *p_mi )
 530 {
 531     bool destroy;
 532
 533     assert( p_mi );
 534     lock(p_mi);
 535     destroy = !--p_mi->i_refcount;
 536     unlock(p_mi);
 537
 538     if( destroy )
 539         libvlc_media_player_destroy( p_mi );
 540 }
 541
 542 /**************************************************************************
 543  * Retain a Media Instance object.
 544  *
 545  * Caller must hold the lock.
 546  **************************************************************************/
 547 void libvlc_media_player_retain( libvlc_media_player_t *p_mi )
 548 {
 549     assert( p_mi );
 550
 551     lock(p_mi);
 552     p_mi->i_refcount++;
 553     unlock(p_mi);
 554 }
 555
 556 /**************************************************************************
 557  * Set the Media descriptor associated with the instance.
 558  *
 559  * Enter without lock -- function will lock the object.
 560  **************************************************************************/
 561 void libvlc_media_player_set_media(
 562                             libvlc_media_player_t *p_mi,
 563                             libvlc_media_t *p_md )
 564 {
 565     lock_input(p_mi);
 566
 567     /* FIXME I am not sure if it is a user request or on die(eof/error)
 568      * request here */
 569     release_input_thread( p_mi,
 570                           p_mi->input.p_thread &&
 571                           !p_mi->input.p_thread->b_eof &&
 572                           !p_mi->input.p_thread->b_error );
 573
 574     lock( p_mi );
 575     set_state( p_mi, libvlc_NothingSpecial, true );
 576     unlock_input( p_mi );
 577
 578     libvlc_media_release( p_mi->p_md );
 579
 580     if( !p_md )
 581     {
 582         p_mi->p_md = NULL;
 583         unlock(p_mi);
 584         return; /* It is ok to pass a NULL md */
 585     }
 586
 587     libvlc_media_retain( p_md );
 588     p_mi->p_md = p_md;
 589
 590     /* The policy here is to ignore that we were created using a different
 591      * libvlc_instance, because we don't really care */
 592     p_mi->p_libvlc_instance = p_md->p_libvlc_instance;
 593
 594     unlock(p_mi);
 595
 596     /* Send an event for the newly available media */
 597     libvlc_event_t event;
 598     event.type = libvlc_MediaPlayerMediaChanged;
 599     event.u.media_player_media_changed.new_media = p_md;
 600     libvlc_event_send( p_mi->p_event_manager, &event );
 601
 602 }
 603
 604 /**************************************************************************
 605  * Get the Media descriptor associated with the instance.
 606  **************************************************************************/
 607 libvlc_media_t *
 608 libvlc_media_player_get_media( libvlc_media_player_t *p_mi )
 609 {
 610     libvlc_media_t *p_m;
 611
 612     lock(p_mi);
 613     p_m = p_mi->p_md;
 614     if( p_m )
 615         libvlc_media_retain( p_mi->p_md );
 616     unlock(p_mi);
 617     return p_mi->p_md;
 618 }
 619
 620 /**************************************************************************
 621  * Get the event Manager.
 622  **************************************************************************/
 623 libvlc_event_manager_t *
 624 libvlc_media_player_event_manager( libvlc_media_player_t *p_mi )
 625 {
 626     return p_mi->p_event_manager;
 627 }
 628
 629 /**************************************************************************
 630  * Tell media player to start playing.
 631  **************************************************************************/
 632 int libvlc_media_player_play( libvlc_media_player_t *p_mi )
 633 {
 634     lock_input( p_mi );
 635
 636     input_thread_t *p_input_thread = p_mi->input.p_thread;
 637     if( p_input_thread )
 638     {
 639         /* A thread already exists, send it a play message */
 640         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 641         unlock_input( p_mi );
 642         return 0;
 643     }
 644
 645     /* Ignore previous exception */
 646     lock(p_mi);
 647
 648     if( !p_mi->p_md )
 649     {
 650         unlock(p_mi);
 651         unlock_input( p_mi );
 652         libvlc_printerr( "No associated media descriptor" );
 653         return -1;
 654     }
 655
 656     if( !p_mi->input.p_resource )
 657         p_mi->input.p_resource = input_resource_New( VLC_OBJECT( p_mi ) );
 658     p_input_thread = input_Create( p_mi, p_mi->p_md->p_input_item, NULL,
 659                                    p_mi->input.p_resource );
 660     unlock(p_mi);
 661     if( !p_input_thread )
 662     {
 663         unlock_input(p_mi);
 664         libvlc_printerr( "Not enough memory" );
 665         return -1;
 666     }
 667
 668     var_AddCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 669     var_AddCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 670     var_AddCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 671
 672     if( input_Start( p_input_thread ) )
 673     {
 674         unlock_input(p_mi);
 675         var_DelCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 676         var_DelCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 677         var_DelCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 678         vlc_object_release( p_input_thread );
 679         libvlc_printerr( "Input initialization failure" );
 680         return -1;
 681     }
 682     p_mi->input.p_thread = p_input_thread;
 683     unlock_input(p_mi);
 684     return 0;
 685 }
 686
 687 /**************************************************************************
 688  * Pause.
 689  **************************************************************************/
 690 void libvlc_media_player_pause( libvlc_media_player_t *p_mi )
 691 {
 692     input_thread_t * p_input_thread = libvlc_get_input_thread( p_mi );
 693     if( !p_input_thread )
 694         return;
 695
 696     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 697     if( state == libvlc_Playing || state == libvlc_Buffering )
 698     {
 699         if( libvlc_media_player_can_pause( p_mi ) )
 700             input_Control( p_input_thread, INPUT_SET_STATE, PAUSE_S );
 701         else
 702             libvlc_media_player_stop( p_mi );
 703     }
 704     else
 705         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 706
 707     vlc_object_release( p_input_thread );
 708 }
 709
 710 /**************************************************************************
 711  * Tells whether the media player is currently playing.
 712  *
 713  * Enter with lock held.
 714  **************************************************************************/
 715 int libvlc_media_player_is_playing( libvlc_media_player_t *p_mi )
 716 {
 717     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 718     return (libvlc_Playing == state) || (libvlc_Buffering == state);
 719 }
 720
 721 /**************************************************************************
 722  * Stop playing.
 723  **************************************************************************/
 724 void libvlc_media_player_stop( libvlc_media_player_t *p_mi )
 725 {
 726     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 727
 728     lock_input(p_mi);
 729     release_input_thread( p_mi, true ); /* This will stop the input thread */
 730
 731     /* Force to go to stopped state, in case we were in Ended, or Error
 732      * state. */
 733     if( state != libvlc_Stopped )
 734     {
 735         set_state( p_mi, libvlc_Stopped, false );
 736
 737         /* Construct and send the event */
 738         libvlc_event_t event;
 739         event.type = libvlc_MediaPlayerStopped;
 740         libvlc_event_send( p_mi->p_event_manager, &event );
 741     }
 742
 743     if( p_mi->input.p_resource != NULL )
 744         input_resource_TerminateVout( p_mi->input.p_resource );
 745     unlock_input(p_mi);
 746 }
 747
 748 /**************************************************************************
 749  * set_nsobject
 750  **************************************************************************/
 751 void libvlc_media_player_set_nsobject( libvlc_media_player_t *p_mi,
 752                                         void * drawable )
 753 {
 754     assert (p_mi != NULL);
 755 #ifdef __APPLE__
 756     var_SetAddress (p_mi, "drawable-nsobject", drawable);
 757 #else
 758     (void) p_mi; (void)drawable;
 759 #endif
 760 }
 761
 762 /**************************************************************************
 763  * get_nsobject
 764  **************************************************************************/
 765 void * libvlc_media_player_get_nsobject( libvlc_media_player_t *p_mi )
 766 {
 767     assert (p_mi != NULL);
 768 #ifdef __APPLE__
 769     return var_GetAddress (p_mi, "drawable-nsobject");
 770 #else
 771     return NULL;
 772 #endif
 773 }
 774
 775 /**************************************************************************
 776  * set_agl
 777  **************************************************************************/
 778 void libvlc_media_player_set_agl( libvlc_media_player_t *p_mi,
 779                                   uint32_t drawable )
 780 {
 781 #ifdef __APPLE__
 782     var_SetInteger (p_mi, "drawable-agl", drawable);
 783 #else
 784     (void) p_mi; (void)drawable;
 785 #endif
 786 }
 787
 788 /**************************************************************************
 789  * get_agl
 790  **************************************************************************/
 791 uint32_t libvlc_media_player_get_agl( libvlc_media_player_t *p_mi )
 792 {
 793     assert (p_mi != NULL);
 794 #ifdef __APPLE__
 795     return var_GetInteger (p_mi, "drawable-agl");
 796 #else
 797     return 0;
 798 #endif
 799 }
 800
 801 /**************************************************************************
 802  * set_xwindow
 803  **************************************************************************/
 804 void libvlc_media_player_set_xwindow( libvlc_media_player_t *p_mi,
 805                                       uint32_t drawable )
 806 {
 807     assert (p_mi != NULL);
 808     var_SetInteger (p_mi, "drawable-xid", drawable);
 809 }
 810
 811 /**************************************************************************
 812  * get_xwindow
 813  **************************************************************************/
 814 uint32_t libvlc_media_player_get_xwindow( libvlc_media_player_t *p_mi )
 815 {
 816     return var_GetInteger (p_mi, "drawable-xid");
 817 }
 818
 819 /**************************************************************************
 820  * set_hwnd
 821  **************************************************************************/
 822 void libvlc_media_player_set_hwnd( libvlc_media_player_t *p_mi,
 823                                    void *drawable )
 824 {
 825     assert (p_mi != NULL);
 826 #ifdef WIN32
 827     var_SetAddress (p_mi, "drawable-hwnd", drawable);
 828 #else
 829     (void) p_mi; (void) drawable;
 830 #endif
 831 }
 832
 833 /**************************************************************************
 834  * get_hwnd
 835  **************************************************************************/
 836 void *libvlc_media_player_get_hwnd( libvlc_media_player_t *p_mi )
 837 {
 838     assert (p_mi != NULL);
 839 #ifdef WIN32
 840     return var_GetAddress (p_mi, "drawable-hwnd");
 841 #else
 842     return NULL;
 843 #endif
 844 }
 845
 846 /**************************************************************************
 847  * Getters for stream information
 848  **************************************************************************/
 849 libvlc_time_t libvlc_media_player_get_length(
 850                              libvlc_media_player_t *p_mi )
 851 {
 852     input_thread_t *p_input_thread;
 853     libvlc_time_t i_time;
 854
 855     p_input_thread = libvlc_get_input_thread ( p_mi );
 856     if( !p_input_thread )
 857         return -1;
 858
 859     i_time = from_mtime(var_GetTime( p_input_thread, "length" ));
 860     vlc_object_release( p_input_thread );
 861
 862     return i_time;
 863 }
 864
 865 libvlc_time_t libvlc_media_player_get_time( libvlc_media_player_t *p_mi )
 866 {
 867     input_thread_t *p_input_thread;
 868     libvlc_time_t i_time;
 869
 870     p_input_thread = libvlc_get_input_thread ( p_mi );
 871     if( !p_input_thread )
 872         return -1;
 873
 874     i_time = from_mtime(var_GetTime( p_input_thread , "time" ));
 875     vlc_object_release( p_input_thread );
 876     return i_time;
 877 }
 878
 879 void libvlc_media_player_set_time( libvlc_media_player_t *p_mi,
 880                                    libvlc_time_t i_time )
 881 {
 882     input_thread_t *p_input_thread;
 883
 884     p_input_thread = libvlc_get_input_thread ( p_mi );
 885     if( !p_input_thread )
 886         return;
 887
 888     var_SetTime( p_input_thread, "time", to_mtime(i_time) );
 889     vlc_object_release( p_input_thread );
 890 }
 891
 892 void libvlc_media_player_set_position( libvlc_media_player_t *p_mi,
 893                                        float position )
 894 {
 895     input_thread_t *p_input_thread;
 896
 897     p_input_thread = libvlc_get_input_thread ( p_mi );
 898     if( !p_input_thread )
 899         return;
 900
 901     var_SetFloat( p_input_thread, "position", position );
 902     vlc_object_release( p_input_thread );
 903 }
 904
 905 float libvlc_media_player_get_position( libvlc_media_player_t *p_mi )
 906 {
 907     input_thread_t *p_input_thread;
 908     float f_position;
 909
 910     p_input_thread = libvlc_get_input_thread ( p_mi );
 911     if( !p_input_thread )
 912         return -1.0;
 913
 914     f_position = var_GetFloat( p_input_thread, "position" );
 915     vlc_object_release( p_input_thread );
 916
 917     return f_position;
 918 }
 919
 920 void libvlc_media_player_set_chapter( libvlc_media_player_t *p_mi,
 921                                       int chapter )
 922 {
 923     input_thread_t *p_input_thread;
 924
 925     p_input_thread = libvlc_get_input_thread ( p_mi );
 926     if( !p_input_thread )
 927         return;
 928
 929     var_SetInteger( p_input_thread, "chapter", chapter );
 930     vlc_object_release( p_input_thread );
 931 }
 932
 933 int libvlc_media_player_get_chapter( libvlc_media_player_t *p_mi )
 934 {
 935     input_thread_t *p_input_thread;
 936     int i_chapter;
 937
 938     p_input_thread = libvlc_get_input_thread ( p_mi );
 939     if( !p_input_thread )
 940         return -1;
 941
 942     i_chapter = var_GetInteger( p_input_thread, "chapter" );
 943     vlc_object_release( p_input_thread );
 944
 945     return i_chapter;
 946 }
 947
 948 int libvlc_media_player_get_chapter_count( libvlc_media_player_t *p_mi )
 949 {
 950     input_thread_t *p_input_thread;
 951     vlc_value_t val;
 952
 953     p_input_thread = libvlc_get_input_thread ( p_mi );
 954     if( !p_input_thread )
 955         return -1;
 956
 957     var_Change( p_input_thread, "chapter", VLC_VAR_CHOICESCOUNT, &val, NULL );
 958     vlc_object_release( p_input_thread );
 959
 960     return val.i_int;
 961 }
 962
 963 int libvlc_media_player_get_chapter_count_for_title(
 964                                  libvlc_media_player_t *p_mi,
 965                                  int i_title )
 966 {
 967     input_thread_t *p_input_thread;
 968     vlc_value_t val;
 969
 970     p_input_thread = libvlc_get_input_thread ( p_mi );
 971     if( !p_input_thread )
 972         return -1;
 973
 974     char *psz_name;
 975     if( asprintf( &psz_name,  "title %2i", i_title ) == -1 )
 976     {
 977         vlc_object_release( p_input_thread );
 978         return -1;
 979     }
 980     var_Change( p_input_thread, psz_name, VLC_VAR_CHOICESCOUNT, &val, NULL );
 981     vlc_object_release( p_input_thread );
 982     free( psz_name );
 983
 984     return val.i_int;
 985 }
 986
 987 void libvlc_media_player_set_title( libvlc_media_player_t *p_mi,
 988                                     int i_title )
 989 {
 990     input_thread_t *p_input_thread;
 991
 992     p_input_thread = libvlc_get_input_thread ( p_mi );
 993     if( !p_input_thread )
 994         return;
 995
 996     var_SetInteger( p_input_thread, "title", i_title );
 997     vlc_object_release( p_input_thread );
 998
 999     //send event
1000     libvlc_event_t event;
1001     event.type = libvlc_MediaPlayerTitleChanged;
1002     event.u.media_player_title_changed.new_title = i_title;
1003     libvlc_event_send( p_mi->p_event_manager, &event );
1004 }
1005
1006 int libvlc_media_player_get_title( libvlc_media_player_t *p_mi )
1007 {
1008     input_thread_t *p_input_thread;
1009     int i_title;
1010
1011     p_input_thread = libvlc_get_input_thread ( p_mi );
1012     if( !p_input_thread )
1013         return -1;
1014
1015     i_title = var_GetInteger( p_input_thread, "title" );
1016     vlc_object_release( p_input_thread );
1017
1018     return i_title;
1019 }
1020
1021 int libvlc_media_player_get_title_count( libvlc_media_player_t *p_mi )
1022 {
1023     input_thread_t *p_input_thread;
1024     vlc_value_t val;
1025
1026     p_input_thread = libvlc_get_input_thread ( p_mi );
1027     if( !p_input_thread )
1028         return -1;
1029
1030     var_Change( p_input_thread, "title", VLC_VAR_CHOICESCOUNT, &val, NULL );
1031     vlc_object_release( p_input_thread );
1032
1033     return val.i_int;
1034 }
1035
1036 void libvlc_media_player_next_chapter( libvlc_media_player_t *p_mi )
1037 {
1038     input_thread_t *p_input_thread;
1039
1040     p_input_thread = libvlc_get_input_thread ( p_mi );
1041     if( !p_input_thread )
1042         return;
1043
1044     int i_type = var_Type( p_input_thread, "next-chapter" );
1045     var_SetBool( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1046                             "next-chapter":"next-title", true );
1047
1048     vlc_object_release( p_input_thread );
1049 }
1050
1051 void libvlc_media_player_previous_chapter( libvlc_media_player_t *p_mi )
1052 {
1053     input_thread_t *p_input_thread;
1054
1055     p_input_thread = libvlc_get_input_thread ( p_mi );
1056     if( !p_input_thread )
1057         return;
1058
1059     int i_type = var_Type( p_input_thread, "next-chapter" );
1060     var_SetBool( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1061                             "prev-chapter":"prev-title", true );
1062
1063     vlc_object_release( p_input_thread );
1064 }
1065
1066 float libvlc_media_player_get_fps( libvlc_media_player_t *p_mi )
1067 {
1068     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1069     double f_fps = 0.0;
1070
1071     if( p_input_thread )
1072     {
1073         if( input_Control( p_input_thread, INPUT_GET_VIDEO_FPS, &f_fps ) )
1074             f_fps = 0.0;
1075         vlc_object_release( p_input_thread );
1076     }
1077     return f_fps;
1078 }
1079
1080 int libvlc_media_player_will_play( libvlc_media_player_t *p_mi )
1081 {
1082     bool b_will_play;
1083     input_thread_t *p_input_thread =
1084                             libvlc_get_input_thread ( p_mi );
1085     if ( !p_input_thread )
1086         return false;
1087
1088     b_will_play = !p_input_thread->b_die && !p_input_thread->b_dead;
1089     vlc_object_release( p_input_thread );
1090
1091     return b_will_play;
1092 }
1093
1094 int libvlc_media_player_set_rate( libvlc_media_player_t *p_mi, float rate )
1095 {
1096     if (rate < 0.)
1097     {
1098         libvlc_printerr ("Playing backward not supported");
1099         return -1;
1100     }
1101
1102     var_SetFloat (p_mi, "rate", rate);
1103
1104     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1105     if( !p_input_thread )
1106         return 0;
1107     var_SetFloat( p_input_thread, "rate", rate );
1108     vlc_object_release( p_input_thread );
1109     return 0;
1110 }
1111
1112 float libvlc_media_player_get_rate( libvlc_media_player_t *p_mi )
1113 {
1114     return var_GetFloat (p_mi, "rate");
1115 }
1116
1117 libvlc_state_t libvlc_media_player_get_state( libvlc_media_player_t *p_mi )
1118 {
1119     lock(p_mi);
1120     libvlc_state_t state = p_mi->state;
1121     unlock(p_mi);
1122     return state;
1123 }
1124
1125 int libvlc_media_player_is_seekable( libvlc_media_player_t *p_mi )
1126 {
1127     input_thread_t *p_input_thread;
1128     bool b_seekable;
1129
1130     p_input_thread = libvlc_get_input_thread ( p_mi );
1131     if ( !p_input_thread )
1132         return false;
1133     b_seekable = var_GetBool( p_input_thread, "can-seek" );
1134     vlc_object_release( p_input_thread );
1135
1136     return b_seekable;
1137 }
1138
1139 /* internal function, used by audio, video */
1140 libvlc_track_description_t *
1141         libvlc_get_track_description( libvlc_media_player_t *p_mi,
1142                                       const char *psz_variable )
1143 {
1144     input_thread_t *p_input = libvlc_get_input_thread( p_mi );
1145     libvlc_track_description_t *p_track_description = NULL,
1146                                *p_actual, *p_previous;
1147
1148     if( !p_input )
1149         return NULL;
1150
1151     vlc_value_t val_list, text_list;
1152     var_Change( p_input, psz_variable, VLC_VAR_GETLIST, &val_list, &text_list);
1153
1154     /* no tracks */
1155     if( val_list.p_list->i_count <= 0 )
1156         goto end;
1157
1158     p_track_description = ( libvlc_track_description_t * )
1159         malloc( sizeof( libvlc_track_description_t ) );
1160     if ( !p_track_description )
1161     {
1162         libvlc_printerr( "Not enough memory" );
1163         goto end;
1164     }
1165     p_actual = p_track_description;
1166     p_previous = NULL;
1167     for( int i = 0; i < val_list.p_list->i_count; i++ )
1168     {
1169         if( !p_actual )
1170         {
1171             p_actual = ( libvlc_track_description_t * )
1172                 malloc( sizeof( libvlc_track_description_t ) );
1173             if ( !p_actual )
1174             {
1175                 libvlc_track_description_release( p_track_description );
1176                 libvlc_printerr( "Not enough memory" );
1177                 goto end;
1178             }
1179         }
1180         p_actual->i_id = val_list.p_list->p_values[i].i_int;
1181         p_actual->psz_name = strdup( text_list.p_list->p_values[i].psz_string );
1182         p_actual->p_next = NULL;
1183         if( p_previous )
1184             p_previous->p_next = p_actual;
1185         p_previous = p_actual;
1186         p_actual =  NULL;
1187     }
1188
1189 end:
1190     var_FreeList( &val_list, &text_list );
1191     vlc_object_release( p_input );
1192
1193     return p_track_description;
1194 }
1195
1196 void libvlc_track_description_release( libvlc_track_description_t *p_td )
1197 {
1198     libvlc_track_description_t *p_actual, *p_before;
1199     p_actual = p_td;
1200
1201     while ( p_actual )
1202     {
1203         free( p_actual->psz_name );
1204         p_before = p_actual;
1205         p_actual = p_before->p_next;
1206         free( p_before );
1207     }
1208 }
1209
1210 int libvlc_media_player_can_pause( libvlc_media_player_t *p_mi )
1211 {
1212     input_thread_t *p_input_thread;
1213     bool b_can_pause;
1214
1215     p_input_thread = libvlc_get_input_thread ( p_mi );
1216     if ( !p_input_thread )
1217         return false;
1218     b_can_pause = var_GetBool( p_input_thread, "can-pause" );
1219     vlc_object_release( p_input_thread );
1220
1221     return b_can_pause;
1222 }
1223
1224 void libvlc_media_player_next_frame( libvlc_media_player_t *p_mi )
1225 {
1226     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1227     if( p_input_thread != NULL )
1228     {
1229         var_TriggerCallback( p_input_thread, "frame-next" );
1230         vlc_object_release( p_input_thread );
1231     }
1232 }