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     /* Store the input resource for future use. */
 131     assert( p_mi->input.p_resource == NULL );
 132     p_mi->input.p_resource = input_DetachResource( p_input_thread );
 133
 134     p_mi->input.p_thread = NULL;
 135     vlc_object_release( p_input_thread );
 136 }
 137
 138 /*
 139  * Retrieve the input thread. Be sure to release the object
 140  * once you are done with it. (libvlc Internal)
 141  */
 142 input_thread_t *libvlc_get_input_thread( libvlc_media_player_t *p_mi )
 143 {
 144     input_thread_t *p_input_thread;
 145
 146     assert( p_mi );
 147
 148     lock_input(p_mi);
 149     p_input_thread = p_mi->input.p_thread;
 150     if( p_input_thread )
 151         vlc_object_hold( p_input_thread );
 152     else
 153         libvlc_printerr( "No active input" );
 154     unlock_input(p_mi);
 155
 156     return p_input_thread;
 157 }
 158
 159 /*
 160  * Set the internal state of the media_player. (media player Internal)
 161  *
 162  * Function will lock the media_player.
 163  */
 164 static void set_state( libvlc_media_player_t *p_mi, libvlc_state_t state,
 165     bool b_locked )
 166 {
 167     if(!b_locked)
 168         lock(p_mi);
 169     p_mi->state = state;
 170
 171     libvlc_media_t *media = p_mi->p_md;
 172     if (media)
 173         libvlc_media_retain(media);
 174
 175     if(!b_locked)
 176         unlock(p_mi);
 177
 178     if (media)
 179     {
 180         // Also set the state of the corresponding media
 181         // This is strictly for convenience.
 182         libvlc_media_set_state(media, state);
 183
 184         libvlc_media_release(media);
 185     }
 186 }
 187
 188 static int
 189 input_seekable_changed( vlc_object_t * p_this, char const * psz_cmd,
 190                         vlc_value_t oldval, vlc_value_t newval,
 191                         void * p_userdata )
 192 {
 193     VLC_UNUSED(oldval);
 194     VLC_UNUSED(p_this);
 195     VLC_UNUSED(psz_cmd);
 196     libvlc_media_player_t * p_mi = p_userdata;
 197     libvlc_event_t event;
 198
 199     event.type = libvlc_MediaPlayerSeekableChanged;
 200     event.u.media_player_seekable_changed.new_seekable = newval.b_bool;
 201
 202     libvlc_event_send( p_mi->p_event_manager, &event );
 203     return VLC_SUCCESS;
 204 }
 205
 206 static int
 207 input_pausable_changed( vlc_object_t * p_this, char const * psz_cmd,
 208                         vlc_value_t oldval, vlc_value_t newval,
 209                         void * p_userdata )
 210 {
 211     VLC_UNUSED(oldval);
 212     VLC_UNUSED(p_this);
 213     VLC_UNUSED(psz_cmd);
 214     libvlc_media_player_t * p_mi = p_userdata;
 215     libvlc_event_t event;
 216
 217     event.type = libvlc_MediaPlayerPausableChanged;
 218     event.u.media_player_pausable_changed.new_pausable = newval.b_bool;
 219
 220     libvlc_event_send( p_mi->p_event_manager, &event );
 221     return VLC_SUCCESS;
 222 }
 223
 224 static int
 225 input_event_changed( vlc_object_t * p_this, char const * psz_cmd,
 226                      vlc_value_t oldval, vlc_value_t newval,
 227                      void * p_userdata )
 228 {
 229     VLC_UNUSED(oldval);
 230     input_thread_t * p_input = (input_thread_t *)p_this;
 231     libvlc_media_player_t * p_mi = p_userdata;
 232     libvlc_event_t event;
 233
 234     assert( !strcmp( psz_cmd, "intf-event" ) );
 235
 236     if( newval.i_int == INPUT_EVENT_STATE )
 237     {
 238         libvlc_state_t libvlc_state;
 239
 240         switch ( var_GetInteger( p_input, "state" ) )
 241         {
 242             case INIT_S:
 243                 libvlc_state = libvlc_NothingSpecial;
 244                 event.type = libvlc_MediaPlayerNothingSpecial;
 245                 break;
 246             case OPENING_S:
 247                 libvlc_state = libvlc_Opening;
 248                 event.type = libvlc_MediaPlayerOpening;
 249                 break;
 250             case PLAYING_S:
 251                 libvlc_state = libvlc_Playing;
 252                 event.type = libvlc_MediaPlayerPlaying;
 253                 break;
 254             case PAUSE_S:
 255                 libvlc_state = libvlc_Paused;
 256                 event.type = libvlc_MediaPlayerPaused;
 257                 break;
 258             case END_S:
 259                 libvlc_state = libvlc_Ended;
 260                 event.type = libvlc_MediaPlayerEndReached;
 261                 break;
 262             case ERROR_S:
 263                 libvlc_state = libvlc_Error;
 264                 event.type = libvlc_MediaPlayerEncounteredError;
 265                 break;
 266
 267             default:
 268                 return VLC_SUCCESS;
 269         }
 270
 271         set_state( p_mi, libvlc_state, false );
 272         libvlc_event_send( p_mi->p_event_manager, &event );
 273     }
 274     else if( newval.i_int == INPUT_EVENT_ABORT )
 275     {
 276         libvlc_state_t libvlc_state = libvlc_Stopped;
 277         event.type = libvlc_MediaPlayerStopped;
 278
 279         set_state( p_mi, libvlc_state, false );
 280         libvlc_event_send( p_mi->p_event_manager, &event );
 281     }
 282     else if( newval.i_int == INPUT_EVENT_POSITION )
 283     {
 284         if( var_GetInteger( p_input, "state" ) != PLAYING_S )
 285             return VLC_SUCCESS; /* Don't send the position while stopped */
 286
 287         /* */
 288         event.type = libvlc_MediaPlayerPositionChanged;
 289         event.u.media_player_position_changed.new_position =
 290                                           var_GetFloat( p_input, "position" );
 291         libvlc_event_send( p_mi->p_event_manager, &event );
 292
 293         /* */
 294         event.type = libvlc_MediaPlayerTimeChanged;
 295         event.u.media_player_time_changed.new_time =
 296            from_mtime(var_GetTime( p_input, "time" ));
 297         libvlc_event_send( p_mi->p_event_manager, &event );
 298     }
 299     else if( newval.i_int == INPUT_EVENT_LENGTH )
 300     {
 301         event.type = libvlc_MediaPlayerLengthChanged;
 302         event.u.media_player_length_changed.new_length =
 303            from_mtime(var_GetTime( p_input, "length" ));
 304         libvlc_event_send( p_mi->p_event_manager, &event );
 305     }
 306
 307     return VLC_SUCCESS;
 308
 309 }
 310
 311 /**************************************************************************
 312  * Snapshot Taken Event.
 313  *
 314  * FIXME: This snapshot API interface makes no sense in media_player.
 315  *************************************************************************/
 316 static int snapshot_was_taken(vlc_object_t *p_this, char const *psz_cmd,
 317                               vlc_value_t oldval, vlc_value_t newval, void *p_data )
 318 {
 319     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_this);
 320
 321     libvlc_media_player_t *mp = p_data;
 322     libvlc_event_t event;
 323     event.type = libvlc_MediaPlayerSnapshotTaken;
 324     event.u.media_player_snapshot_taken.psz_filename = newval.psz_string;
 325     libvlc_event_send(mp->p_event_manager, &event);
 326
 327     return VLC_SUCCESS;
 328 }
 329
 330 static input_thread_t *find_input (vlc_object_t *obj)
 331 {
 332     libvlc_media_player_t *mp = (libvlc_media_player_t *)obj;
 333
 334     return libvlc_get_input_thread (mp);
 335 }
 336
 337 /* */
 338 static void libvlc_media_player_destroy( libvlc_media_player_t * );
 339
 340
 341 /**************************************************************************
 342  * Create a Media Instance object.
 343  *
 344  * Refcount strategy:
 345  * - All items created by _new start with a refcount set to 1.
 346  * - Accessor _release decrease the refcount by 1, if after that
 347  *   operation the refcount is 0, the object is destroyed.
 348  * - Accessor _retain increase the refcount by 1 (XXX: to implement)
 349  *
 350  * Object locking strategy:
 351  * - No lock held while in constructor.
 352  * - When accessing any member variable this lock is held. (XXX who locks?)
 353  * - When attempting to destroy the object the lock is also held.
 354  **************************************************************************/
 355 libvlc_media_player_t *
 356 libvlc_media_player_new( libvlc_instance_t *instance )
 357 {
 358     libvlc_media_player_t * mp;
 359
 360     assert(instance);
 361
 362     mp = vlc_object_create (instance->p_libvlc_int, sizeof(*mp));
 363     if (unlikely(mp == NULL))
 364     {
 365         libvlc_printerr("Not enough memory");
 366         return NULL;
 367     }
 368     vlc_object_attach (mp, mp->p_libvlc);
 369
 370     /* Input */
 371     var_Create (mp, "rate", VLC_VAR_FLOAT|VLC_VAR_DOINHERIT);
 372
 373     /* Video */
 374     var_Create (mp, "drawable-xid", VLC_VAR_INTEGER);
 375 #ifdef WIN32
 376     var_Create (mp, "drawable-hwnd", VLC_VAR_ADDRESS);
 377 #endif
 378 #ifdef __APPLE__
 379     var_Create (mp, "drawable-agl", VLC_VAR_INTEGER);
 380     var_Create (mp, "drawable-nsobject", VLC_VAR_ADDRESS);
 381 #endif
 382
 383     var_Create (mp, "keyboard-events", VLC_VAR_BOOL);
 384     var_SetBool (mp, "keyboard-events", true);
 385     var_Create (mp, "mouse-events", VLC_VAR_BOOL);
 386     var_SetBool (mp, "mouse-events", true);
 387
 388     var_Create (mp, "fullscreen", VLC_VAR_BOOL);
 389     var_Create (mp, "autoscale", VLC_VAR_BOOL);
 390     var_SetBool (mp, "autoscale", true);
 391     var_Create (mp, "scale", VLC_VAR_FLOAT);
 392     var_SetFloat (mp, "scale", 1.);
 393     var_Create (mp, "aspect-ratio", VLC_VAR_STRING);
 394     var_Create (mp, "crop", VLC_VAR_STRING);
 395     var_Create (mp, "deinterlace", VLC_VAR_INTEGER);
 396     var_Create (mp, "deinterlace-mode", VLC_VAR_STRING);
 397
 398     var_Create (mp, "vbi-page", VLC_VAR_INTEGER);
 399
 400     var_Create (mp, "marq-marquee", VLC_VAR_STRING);
 401     var_Create (mp, "marq-color", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 402     var_Create (mp, "marq-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 403     var_Create (mp, "marq-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 404     var_Create (mp, "marq-refresh", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 405     var_Create (mp, "marq-size", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 406     var_Create (mp, "marq-timeout", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 407     var_Create (mp, "marq-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 408     var_Create (mp, "marq-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 409
 410     var_Create (mp, "logo-file", VLC_VAR_STRING);
 411     var_Create (mp, "logo-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 412     var_Create (mp, "logo-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 413     var_Create (mp, "logo-delay", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 414     var_Create (mp, "logo-repeat", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 415     var_Create (mp, "logo-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 416     var_Create (mp, "logo-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 417
 418      /* Audio */
 419     var_Create (mp, "aout", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 420     var_Create (mp, "volume-muted", VLC_VAR_BOOL);
 421     var_Create (mp, "saved-volume", VLC_VAR_INTEGER);
 422     var_Create (mp, "volume-change", VLC_VAR_VOID);
 423     var_Create (mp, "find-input-callback", VLC_VAR_ADDRESS);
 424     var_SetAddress (mp, "find-input-callback", find_input);
 425
 426     mp->p_md = NULL;
 427     mp->state = libvlc_NothingSpecial;
 428     mp->p_libvlc_instance = instance;
 429     mp->input.p_thread = NULL;
 430     mp->input.p_resource = NULL;
 431     vlc_mutex_init (&mp->input.lock);
 432     mp->i_refcount = 1;
 433     mp->p_event_manager = libvlc_event_manager_new(mp, instance);
 434     if (unlikely(mp->p_event_manager == NULL))
 435     {
 436         vlc_object_release(mp);
 437         return NULL;
 438     }
 439     vlc_mutex_init(&mp->object_lock);
 440
 441     register_event(mp, NothingSpecial);
 442     register_event(mp, Opening);
 443     register_event(mp, Buffering);
 444     register_event(mp, Playing);
 445     register_event(mp, Paused);
 446     register_event(mp, Stopped);
 447     register_event(mp, Forward);
 448     register_event(mp, Backward);
 449     register_event(mp, EndReached);
 450     register_event(mp, EncounteredError);
 451     register_event(mp, SeekableChanged);
 452
 453     register_event(mp, PositionChanged);
 454     register_event(mp, TimeChanged);
 455     register_event(mp, LengthChanged);
 456     register_event(mp, TitleChanged);
 457     register_event(mp, PausableChanged);
 458
 459     /* Snapshot initialization */
 460     register_event(mp, SnapshotTaken);
 461
 462     register_event(mp, MediaChanged);
 463
 464     /* Attach a var callback to the global object to provide the glue between
 465      * vout_thread that generates the event and media_player that re-emits it
 466      * with its own event manager
 467      *
 468      * FIXME: It's unclear why we want to put this in public API, and why we
 469      * want to expose it in such a limiting and ugly way.
 470      */
 471     var_AddCallback(mp->p_libvlc, "snapshot-file", snapshot_was_taken, mp);
 472
 473     libvlc_retain(instance);
 474     return mp;
 475 }
 476
 477 /**************************************************************************
 478  * Create a Media Instance object with a media descriptor.
 479  **************************************************************************/
 480 libvlc_media_player_t *
 481 libvlc_media_player_new_from_media( libvlc_media_t * p_md )
 482 {
 483     libvlc_media_player_t * p_mi;
 484
 485     p_mi = libvlc_media_player_new( p_md->p_libvlc_instance );
 486     if( !p_mi )
 487         return NULL;
 488
 489     libvlc_media_retain( p_md );
 490     p_mi->p_md = p_md;
 491
 492     return p_mi;
 493 }
 494
 495 /**************************************************************************
 496  * Destroy a Media Instance object (libvlc internal)
 497  *
 498  * Warning: No lock held here, but hey, this is internal. Caller must lock.
 499  **************************************************************************/
 500 static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi )
 501 {
 502     assert( p_mi );
 503
 504     /* Detach Callback from the main libvlc object */
 505     var_DelCallback( p_mi->p_libvlc,
 506                      "snapshot-file", snapshot_was_taken, p_mi );
 507
 508     /* No need for lock_input() because no other threads knows us anymore */
 509     if( p_mi->input.p_thread )
 510         release_input_thread(p_mi, true);
 511     if( p_mi->input.p_resource )
 512     {
 513         input_resource_Delete( p_mi->input.p_resource );
 514         p_mi->input.p_resource = NULL;
 515     }
 516     vlc_mutex_destroy( &p_mi->input.lock );
 517
 518     libvlc_event_manager_release( p_mi->p_event_manager );
 519     libvlc_media_release( p_mi->p_md );
 520     vlc_mutex_destroy( &p_mi->object_lock );
 521
 522     libvlc_instance_t *instance = p_mi->p_libvlc_instance;
 523     vlc_object_release( p_mi );
 524     libvlc_release(instance);
 525 }
 526
 527 /**************************************************************************
 528  * Release a Media Instance object.
 529  *
 530  * Function does the locking.
 531  **************************************************************************/
 532 void libvlc_media_player_release( libvlc_media_player_t *p_mi )
 533 {
 534     bool destroy;
 535
 536     assert( p_mi );
 537     lock(p_mi);
 538     destroy = !--p_mi->i_refcount;
 539     unlock(p_mi);
 540
 541     if( destroy )
 542         libvlc_media_player_destroy( p_mi );
 543 }
 544
 545 /**************************************************************************
 546  * Retain a Media Instance object.
 547  *
 548  * Caller must hold the lock.
 549  **************************************************************************/
 550 void libvlc_media_player_retain( libvlc_media_player_t *p_mi )
 551 {
 552     assert( p_mi );
 553
 554     lock(p_mi);
 555     p_mi->i_refcount++;
 556     unlock(p_mi);
 557 }
 558
 559 /**************************************************************************
 560  * Set the Media descriptor associated with the instance.
 561  *
 562  * Enter without lock -- function will lock the object.
 563  **************************************************************************/
 564 void libvlc_media_player_set_media(
 565                             libvlc_media_player_t *p_mi,
 566                             libvlc_media_t *p_md )
 567 {
 568     lock_input(p_mi);
 569
 570     /* FIXME I am not sure if it is a user request or on die(eof/error)
 571      * request here */
 572     release_input_thread( p_mi,
 573                           p_mi->input.p_thread &&
 574                           !p_mi->input.p_thread->b_eof &&
 575                           !p_mi->input.p_thread->b_error );
 576
 577     lock( p_mi );
 578     set_state( p_mi, libvlc_NothingSpecial, true );
 579     unlock_input( p_mi );
 580
 581     libvlc_media_release( p_mi->p_md );
 582
 583     if( !p_md )
 584     {
 585         p_mi->p_md = NULL;
 586         unlock(p_mi);
 587         return; /* It is ok to pass a NULL md */
 588     }
 589
 590     libvlc_media_retain( p_md );
 591     p_mi->p_md = p_md;
 592
 593     /* The policy here is to ignore that we were created using a different
 594      * libvlc_instance, because we don't really care */
 595     p_mi->p_libvlc_instance = p_md->p_libvlc_instance;
 596
 597     unlock(p_mi);
 598
 599     /* Send an event for the newly available media */
 600     libvlc_event_t event;
 601     event.type = libvlc_MediaPlayerMediaChanged;
 602     event.u.media_player_media_changed.new_media = p_md;
 603     libvlc_event_send( p_mi->p_event_manager, &event );
 604
 605 }
 606
 607 /**************************************************************************
 608  * Get the Media descriptor associated with the instance.
 609  **************************************************************************/
 610 libvlc_media_t *
 611 libvlc_media_player_get_media( libvlc_media_player_t *p_mi )
 612 {
 613     libvlc_media_t *p_m;
 614
 615     lock(p_mi);
 616     p_m = p_mi->p_md;
 617     if( p_m )
 618         libvlc_media_retain( p_mi->p_md );
 619     unlock(p_mi);
 620     return p_mi->p_md;
 621 }
 622
 623 /**************************************************************************
 624  * Get the event Manager.
 625  **************************************************************************/
 626 libvlc_event_manager_t *
 627 libvlc_media_player_event_manager( libvlc_media_player_t *p_mi )
 628 {
 629     return p_mi->p_event_manager;
 630 }
 631
 632 /**************************************************************************
 633  * Tell media player to start playing.
 634  **************************************************************************/
 635 int libvlc_media_player_play( libvlc_media_player_t *p_mi )
 636 {
 637     lock_input( p_mi );
 638
 639     input_thread_t *p_input_thread = p_mi->input.p_thread;
 640     if( p_input_thread )
 641     {
 642         /* A thread already exists, send it a play message */
 643         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 644         unlock_input( p_mi );
 645         return 0;
 646     }
 647
 648     /* Ignore previous exception */
 649     lock(p_mi);
 650
 651     if( !p_mi->p_md )
 652     {
 653         unlock(p_mi);
 654         libvlc_printerr( "No associated media descriptor" );
 655         return -1;
 656     }
 657
 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     p_mi->input.p_resource = NULL;
 669
 670     var_AddCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 671     var_AddCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 672     var_AddCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 673
 674     if( input_Start( p_input_thread ) )
 675     {
 676         unlock_input(p_mi);
 677         var_DelCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 678         var_DelCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 679         var_DelCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 680         vlc_object_release( p_input_thread );
 681         libvlc_printerr( "Input initialization failure" );
 682         return -1;
 683     }
 684     p_mi->input.p_thread = p_input_thread;
 685     unlock_input(p_mi);
 686     return 0;
 687 }
 688
 689 /**************************************************************************
 690  * Pause.
 691  **************************************************************************/
 692 void libvlc_media_player_pause( libvlc_media_player_t *p_mi )
 693 {
 694     input_thread_t * p_input_thread = libvlc_get_input_thread( p_mi );
 695     if( !p_input_thread )
 696         return;
 697
 698     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 699     if( state == libvlc_Playing || state == libvlc_Buffering )
 700     {
 701         if( libvlc_media_player_can_pause( p_mi ) )
 702             input_Control( p_input_thread, INPUT_SET_STATE, PAUSE_S );
 703         else
 704             libvlc_media_player_stop( p_mi );
 705     }
 706     else
 707         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 708
 709     vlc_object_release( p_input_thread );
 710 }
 711
 712 /**************************************************************************
 713  * Tells whether the media player is currently playing.
 714  *
 715  * Enter with lock held.
 716  **************************************************************************/
 717 int libvlc_media_player_is_playing( libvlc_media_player_t *p_mi )
 718 {
 719     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 720     return (libvlc_Playing == state) || (libvlc_Buffering == state);
 721 }
 722
 723 /**************************************************************************
 724  * Stop playing.
 725  **************************************************************************/
 726 void libvlc_media_player_stop( libvlc_media_player_t *p_mi )
 727 {
 728     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 729
 730     lock_input(p_mi);
 731     release_input_thread( p_mi, true ); /* This will stop the input thread */
 732
 733     /* Force to go to stopped state, in case we were in Ended, or Error
 734      * state. */
 735     if( state != libvlc_Stopped )
 736     {
 737         set_state( p_mi, libvlc_Stopped, false );
 738
 739         /* Construct and send the event */
 740         libvlc_event_t event;
 741         event.type = libvlc_MediaPlayerStopped;
 742         libvlc_event_send( p_mi->p_event_manager, &event );
 743     }
 744     unlock_input(p_mi);
 745 }
 746
 747 /**************************************************************************
 748  * set_nsobject
 749  **************************************************************************/
 750 void libvlc_media_player_set_nsobject( libvlc_media_player_t *p_mi,
 751                                         void * drawable )
 752 {
 753     assert (p_mi != NULL);
 754 #ifdef __APPLE__
 755     var_SetAddress (p_mi, "drawable-nsobject", drawable);
 756 #else
 757     (void) p_mi; (void)drawable;
 758 #endif
 759 }
 760
 761 /**************************************************************************
 762  * get_nsobject
 763  **************************************************************************/
 764 void * libvlc_media_player_get_nsobject( libvlc_media_player_t *p_mi )
 765 {
 766     assert (p_mi != NULL);
 767 #ifdef __APPLE__
 768     return var_GetAddress (p_mi, "drawable-nsobject");
 769 #else
 770     return NULL;
 771 #endif
 772 }
 773
 774 /**************************************************************************
 775  * set_agl
 776  **************************************************************************/
 777 void libvlc_media_player_set_agl( libvlc_media_player_t *p_mi,
 778                                   uint32_t drawable )
 779 {
 780 #ifdef __APPLE__
 781     var_SetInteger (p_mi, "drawable-agl", drawable);
 782 #else
 783     (void) p_mi; (void)drawable;
 784 #endif
 785 }
 786
 787 /**************************************************************************
 788  * get_agl
 789  **************************************************************************/
 790 uint32_t libvlc_media_player_get_agl( libvlc_media_player_t *p_mi )
 791 {
 792     assert (p_mi != NULL);
 793 #ifdef __APPLE__
 794     return var_GetInteger (p_mi, "drawable-agl");
 795 #else
 796     return 0;
 797 #endif
 798 }
 799
 800 /**************************************************************************
 801  * set_xwindow
 802  **************************************************************************/
 803 void libvlc_media_player_set_xwindow( libvlc_media_player_t *p_mi,
 804                                       uint32_t drawable )
 805 {
 806     assert (p_mi != NULL);
 807     var_SetInteger (p_mi, "drawable-xid", drawable);
 808 }
 809
 810 /**************************************************************************
 811  * get_xwindow
 812  **************************************************************************/
 813 uint32_t libvlc_media_player_get_xwindow( libvlc_media_player_t *p_mi )
 814 {
 815     return var_GetInteger (p_mi, "drawable-xid");
 816 }
 817
 818 /**************************************************************************
 819  * set_hwnd
 820  **************************************************************************/
 821 void libvlc_media_player_set_hwnd( libvlc_media_player_t *p_mi,
 822                                    void *drawable )
 823 {
 824     assert (p_mi != NULL);
 825 #ifdef WIN32
 826     var_SetAddress (p_mi, "drawable-hwnd", drawable);
 827 #else
 828     (void) p_mi; (void) drawable;
 829 #endif
 830 }
 831
 832 /**************************************************************************
 833  * get_hwnd
 834  **************************************************************************/
 835 void *libvlc_media_player_get_hwnd( libvlc_media_player_t *p_mi )
 836 {
 837     assert (p_mi != NULL);
 838 #ifdef WIN32
 839     return var_GetAddress (p_mi, "drawable-hwnd");
 840 #else
 841     return NULL;
 842 #endif
 843 }
 844
 845 /**************************************************************************
 846  * Getters for stream information
 847  **************************************************************************/
 848 libvlc_time_t libvlc_media_player_get_length(
 849                              libvlc_media_player_t *p_mi )
 850 {
 851     input_thread_t *p_input_thread;
 852     libvlc_time_t i_time;
 853
 854     p_input_thread = libvlc_get_input_thread ( p_mi );
 855     if( !p_input_thread )
 856         return -1;
 857
 858     i_time = from_mtime(var_GetTime( p_input_thread, "length" ));
 859     vlc_object_release( p_input_thread );
 860
 861     return i_time;
 862 }
 863
 864 libvlc_time_t libvlc_media_player_get_time( libvlc_media_player_t *p_mi )
 865 {
 866     input_thread_t *p_input_thread;
 867     libvlc_time_t i_time;
 868
 869     p_input_thread = libvlc_get_input_thread ( p_mi );
 870     if( !p_input_thread )
 871         return -1;
 872
 873     i_time = from_mtime(var_GetTime( p_input_thread , "time" ));
 874     vlc_object_release( p_input_thread );
 875     return i_time;
 876 }
 877
 878 void libvlc_media_player_set_time( libvlc_media_player_t *p_mi,
 879                                    libvlc_time_t i_time )
 880 {
 881     input_thread_t *p_input_thread;
 882
 883     p_input_thread = libvlc_get_input_thread ( p_mi );
 884     if( !p_input_thread )
 885         return;
 886
 887     var_SetTime( p_input_thread, "time", to_mtime(i_time) );
 888     vlc_object_release( p_input_thread );
 889 }
 890
 891 void libvlc_media_player_set_position( libvlc_media_player_t *p_mi,
 892                                        float position )
 893 {
 894     input_thread_t *p_input_thread;
 895
 896     p_input_thread = libvlc_get_input_thread ( p_mi );
 897     if( !p_input_thread )
 898         return;
 899
 900     var_SetFloat( p_input_thread, "position", position );
 901     vlc_object_release( p_input_thread );
 902 }
 903
 904 float libvlc_media_player_get_position( libvlc_media_player_t *p_mi )
 905 {
 906     input_thread_t *p_input_thread;
 907     float f_position;
 908
 909     p_input_thread = libvlc_get_input_thread ( p_mi );
 910     if( !p_input_thread )
 911         return -1.0;
 912
 913     f_position = var_GetFloat( p_input_thread, "position" );
 914     vlc_object_release( p_input_thread );
 915
 916     return f_position;
 917 }
 918
 919 void libvlc_media_player_set_chapter( libvlc_media_player_t *p_mi,
 920                                       int chapter )
 921 {
 922     input_thread_t *p_input_thread;
 923
 924     p_input_thread = libvlc_get_input_thread ( p_mi );
 925     if( !p_input_thread )
 926         return;
 927
 928     var_SetInteger( p_input_thread, "chapter", chapter );
 929     vlc_object_release( p_input_thread );
 930 }
 931
 932 int libvlc_media_player_get_chapter( libvlc_media_player_t *p_mi )
 933 {
 934     input_thread_t *p_input_thread;
 935     int i_chapter;
 936
 937     p_input_thread = libvlc_get_input_thread ( p_mi );
 938     if( !p_input_thread )
 939         return -1;
 940
 941     i_chapter = var_GetInteger( p_input_thread, "chapter" );
 942     vlc_object_release( p_input_thread );
 943
 944     return i_chapter;
 945 }
 946
 947 int libvlc_media_player_get_chapter_count( libvlc_media_player_t *p_mi )
 948 {
 949     input_thread_t *p_input_thread;
 950     vlc_value_t val;
 951
 952     p_input_thread = libvlc_get_input_thread ( p_mi );
 953     if( !p_input_thread )
 954         return -1;
 955
 956     var_Change( p_input_thread, "chapter", VLC_VAR_CHOICESCOUNT, &val, NULL );
 957     vlc_object_release( p_input_thread );
 958
 959     return val.i_int;
 960 }
 961
 962 int libvlc_media_player_get_chapter_count_for_title(
 963                                  libvlc_media_player_t *p_mi,
 964                                  int i_title )
 965 {
 966     input_thread_t *p_input_thread;
 967     vlc_value_t val;
 968
 969     p_input_thread = libvlc_get_input_thread ( p_mi );
 970     if( !p_input_thread )
 971         return -1;
 972
 973     char *psz_name;
 974     if( asprintf( &psz_name,  "title %2i", i_title ) == -1 )
 975     {
 976         vlc_object_release( p_input_thread );
 977         return -1;
 978     }
 979     var_Change( p_input_thread, psz_name, VLC_VAR_CHOICESCOUNT, &val, NULL );
 980     vlc_object_release( p_input_thread );
 981     free( psz_name );
 982
 983     return val.i_int;
 984 }
 985
 986 void libvlc_media_player_set_title( libvlc_media_player_t *p_mi,
 987                                     int i_title )
 988 {
 989     input_thread_t *p_input_thread;
 990
 991     p_input_thread = libvlc_get_input_thread ( p_mi );
 992     if( !p_input_thread )
 993         return;
 994
 995     var_SetInteger( p_input_thread, "title", i_title );
 996     vlc_object_release( p_input_thread );
 997
 998     //send event
 999     libvlc_event_t event;
1000     event.type = libvlc_MediaPlayerTitleChanged;
1001     event.u.media_player_title_changed.new_title = i_title;
1002     libvlc_event_send( p_mi->p_event_manager, &event );
1003 }
1004
1005 int libvlc_media_player_get_title( libvlc_media_player_t *p_mi )
1006 {
1007     input_thread_t *p_input_thread;
1008     int i_title;
1009
1010     p_input_thread = libvlc_get_input_thread ( p_mi );
1011     if( !p_input_thread )
1012         return -1;
1013
1014     i_title = var_GetInteger( p_input_thread, "title" );
1015     vlc_object_release( p_input_thread );
1016
1017     return i_title;
1018 }
1019
1020 int libvlc_media_player_get_title_count( libvlc_media_player_t *p_mi )
1021 {
1022     input_thread_t *p_input_thread;
1023     vlc_value_t val;
1024
1025     p_input_thread = libvlc_get_input_thread ( p_mi );
1026     if( !p_input_thread )
1027         return -1;
1028
1029     var_Change( p_input_thread, "title", VLC_VAR_CHOICESCOUNT, &val, NULL );
1030     vlc_object_release( p_input_thread );
1031
1032     return val.i_int;
1033 }
1034
1035 void libvlc_media_player_next_chapter( libvlc_media_player_t *p_mi )
1036 {
1037     input_thread_t *p_input_thread;
1038
1039     p_input_thread = libvlc_get_input_thread ( p_mi );
1040     if( !p_input_thread )
1041         return;
1042
1043     int i_type = var_Type( p_input_thread, "next-chapter" );
1044     var_SetBool( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1045                             "next-chapter":"next-title", true );
1046
1047     vlc_object_release( p_input_thread );
1048 }
1049
1050 void libvlc_media_player_previous_chapter( libvlc_media_player_t *p_mi )
1051 {
1052     input_thread_t *p_input_thread;
1053
1054     p_input_thread = libvlc_get_input_thread ( p_mi );
1055     if( !p_input_thread )
1056         return;
1057
1058     int i_type = var_Type( p_input_thread, "next-chapter" );
1059     var_SetBool( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1060                             "prev-chapter":"prev-title", true );
1061
1062     vlc_object_release( p_input_thread );
1063 }
1064
1065 float libvlc_media_player_get_fps( libvlc_media_player_t *p_mi )
1066 {
1067     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1068     double f_fps = 0.0;
1069
1070     if( p_input_thread )
1071     {
1072         if( input_Control( p_input_thread, INPUT_GET_VIDEO_FPS, &f_fps ) )
1073             f_fps = 0.0;
1074         vlc_object_release( p_input_thread );
1075     }
1076     return f_fps;
1077 }
1078
1079 int libvlc_media_player_will_play( libvlc_media_player_t *p_mi )
1080 {
1081     bool b_will_play;
1082     input_thread_t *p_input_thread =
1083                             libvlc_get_input_thread ( p_mi );
1084     if ( !p_input_thread )
1085         return false;
1086
1087     b_will_play = !p_input_thread->b_die && !p_input_thread->b_dead;
1088     vlc_object_release( p_input_thread );
1089
1090     return b_will_play;
1091 }
1092
1093 int libvlc_media_player_set_rate( libvlc_media_player_t *p_mi, float rate )
1094 {
1095     if (rate < 0.)
1096     {
1097         libvlc_printerr ("Playing backward not supported");
1098         return -1;
1099     }
1100
1101     var_SetFloat (p_mi, "rate", rate);
1102
1103     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1104     if( !p_input_thread )
1105         return 0;
1106     var_SetFloat( p_input_thread, "rate", rate );
1107     vlc_object_release( p_input_thread );
1108     return 0;
1109 }
1110
1111 float libvlc_media_player_get_rate( libvlc_media_player_t *p_mi )
1112 {
1113     return var_GetFloat (p_mi, "rate");
1114 }
1115
1116 libvlc_state_t libvlc_media_player_get_state( libvlc_media_player_t *p_mi )
1117 {
1118     lock(p_mi);
1119     libvlc_state_t state = p_mi->state;
1120     unlock(p_mi);
1121     return state;
1122 }
1123
1124 int libvlc_media_player_is_seekable( libvlc_media_player_t *p_mi )
1125 {
1126     input_thread_t *p_input_thread;
1127     bool b_seekable;
1128
1129     p_input_thread = libvlc_get_input_thread ( p_mi );
1130     if ( !p_input_thread )
1131         return false;
1132     b_seekable = var_GetBool( p_input_thread, "can-seek" );
1133     vlc_object_release( p_input_thread );
1134
1135     return b_seekable;
1136 }
1137
1138 /* internal function, used by audio, video */
1139 libvlc_track_description_t *
1140         libvlc_get_track_description( libvlc_media_player_t *p_mi,
1141                                       const char *psz_variable )
1142 {
1143     input_thread_t *p_input = libvlc_get_input_thread( p_mi );
1144     libvlc_track_description_t *p_track_description = NULL,
1145                                *p_actual, *p_previous;
1146
1147     if( !p_input )
1148         return NULL;
1149
1150     vlc_value_t val_list, text_list;
1151     var_Change( p_input, psz_variable, VLC_VAR_GETLIST, &val_list, &text_list);
1152
1153     /* no tracks */
1154     if( val_list.p_list->i_count <= 0 )
1155         goto end;
1156
1157     p_track_description = ( libvlc_track_description_t * )
1158         malloc( sizeof( libvlc_track_description_t ) );
1159     if ( !p_track_description )
1160     {
1161         libvlc_printerr( "Not enough memory" );
1162         goto end;
1163     }
1164     p_actual = p_track_description;
1165     p_previous = NULL;
1166     for( int i = 0; i < val_list.p_list->i_count; i++ )
1167     {
1168         if( !p_actual )
1169         {
1170             p_actual = ( libvlc_track_description_t * )
1171                 malloc( sizeof( libvlc_track_description_t ) );
1172             if ( !p_actual )
1173             {
1174                 libvlc_track_description_release( p_track_description );
1175                 libvlc_printerr( "Not enough memory" );
1176                 goto end;
1177             }
1178         }
1179         p_actual->i_id = val_list.p_list->p_values[i].i_int;
1180         p_actual->psz_name = strdup( text_list.p_list->p_values[i].psz_string );
1181         p_actual->p_next = NULL;
1182         if( p_previous )
1183             p_previous->p_next = p_actual;
1184         p_previous = p_actual;
1185         p_actual =  NULL;
1186     }
1187
1188 end:
1189     var_FreeList( &val_list, &text_list );
1190     vlc_object_release( p_input );
1191
1192     return p_track_description;
1193 }
1194
1195 void libvlc_track_description_release( libvlc_track_description_t *p_td )
1196 {
1197     libvlc_track_description_t *p_actual, *p_before;
1198     p_actual = p_td;
1199
1200     while ( p_actual )
1201     {
1202         free( p_actual->psz_name );
1203         p_before = p_actual;
1204         p_actual = p_before->p_next;
1205         free( p_before );
1206     }
1207 }
1208
1209 int libvlc_media_player_can_pause( libvlc_media_player_t *p_mi )
1210 {
1211     input_thread_t *p_input_thread;
1212     bool b_can_pause;
1213
1214     p_input_thread = libvlc_get_input_thread ( p_mi );
1215     if ( !p_input_thread )
1216         return false;
1217     b_can_pause = var_GetBool( p_input_thread, "can-pause" );
1218     vlc_object_release( p_input_thread );
1219
1220     return b_can_pause;
1221 }
1222
1223 void libvlc_media_player_next_frame( libvlc_media_player_t *p_mi )
1224 {
1225     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1226     if( p_input_thread != NULL )
1227     {
1228         var_TriggerCallback( p_input_thread, "frame-next" );
1229         vlc_object_release( p_input_thread );
1230     }
1231 }