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, "window", VLC_VAR_STRING);
 371     var_Create (mp, "drawable-xid", VLC_VAR_INTEGER);
 372 #ifdef WIN32
 373     var_Create (mp, "drawable-hwnd", VLC_VAR_ADDRESS);
 374 #endif
 375 #ifdef __APPLE__
 376     var_Create (mp, "drawable-agl", VLC_VAR_INTEGER);
 377     var_Create (mp, "drawable-nsobject", VLC_VAR_ADDRESS);
 378 #endif
 379
 380     var_Create (mp, "keyboard-events", VLC_VAR_BOOL);
 381     var_SetBool (mp, "keyboard-events", true);
 382     var_Create (mp, "mouse-events", VLC_VAR_BOOL);
 383     var_SetBool (mp, "mouse-events", true);
 384
 385     var_Create (mp, "fullscreen", VLC_VAR_BOOL);
 386     var_Create (mp, "autoscale", VLC_VAR_BOOL);
 387     var_SetBool (mp, "autoscale", true);
 388     var_Create (mp, "scale", VLC_VAR_FLOAT);
 389     var_SetFloat (mp, "scale", 1.);
 390     var_Create (mp, "aspect-ratio", VLC_VAR_STRING);
 391     var_Create (mp, "crop", VLC_VAR_STRING);
 392     var_Create (mp, "deinterlace", VLC_VAR_INTEGER);
 393     var_Create (mp, "deinterlace-mode", VLC_VAR_STRING);
 394
 395     var_Create (mp, "vbi-page", VLC_VAR_INTEGER);
 396
 397     var_Create (mp, "marq-marquee", VLC_VAR_STRING);
 398     var_Create (mp, "marq-color", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 399     var_Create (mp, "marq-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 400     var_Create (mp, "marq-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 401     var_Create (mp, "marq-refresh", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 402     var_Create (mp, "marq-size", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 403     var_Create (mp, "marq-timeout", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 404     var_Create (mp, "marq-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 405     var_Create (mp, "marq-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 406
 407     var_Create (mp, "logo-file", VLC_VAR_STRING);
 408     var_Create (mp, "logo-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 409     var_Create (mp, "logo-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 410     var_Create (mp, "logo-delay", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 411     var_Create (mp, "logo-repeat", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 412     var_Create (mp, "logo-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 413     var_Create (mp, "logo-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 414
 415     var_Create (mp, "contrast", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 416     var_Create (mp, "brightness", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 417     var_Create (mp, "hue", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 418     var_Create (mp, "saturation", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 419     var_Create (mp, "gamma", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 420
 421      /* Audio */
 422     var_Create (mp, "aout", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 423     var_Create (mp, "volume-muted", VLC_VAR_BOOL);
 424     var_Create (mp, "saved-volume", VLC_VAR_INTEGER);
 425     var_Create (mp, "volume-change", VLC_VAR_VOID);
 426     var_Create (mp, "find-input-callback", VLC_VAR_ADDRESS);
 427     var_SetAddress (mp, "find-input-callback", find_input);
 428
 429     mp->p_md = NULL;
 430     mp->state = libvlc_NothingSpecial;
 431     mp->p_libvlc_instance = instance;
 432     mp->input.p_thread = NULL;
 433     mp->input.p_resource = NULL;
 434     vlc_mutex_init (&mp->input.lock);
 435     mp->i_refcount = 1;
 436     mp->p_event_manager = libvlc_event_manager_new(mp, instance);
 437     if (unlikely(mp->p_event_manager == NULL))
 438     {
 439         vlc_object_release(mp);
 440         return NULL;
 441     }
 442     vlc_mutex_init(&mp->object_lock);
 443
 444     register_event(mp, NothingSpecial);
 445     register_event(mp, Opening);
 446     register_event(mp, Buffering);
 447     register_event(mp, Playing);
 448     register_event(mp, Paused);
 449     register_event(mp, Stopped);
 450     register_event(mp, Forward);
 451     register_event(mp, Backward);
 452     register_event(mp, EndReached);
 453     register_event(mp, EncounteredError);
 454     register_event(mp, SeekableChanged);
 455
 456     register_event(mp, PositionChanged);
 457     register_event(mp, TimeChanged);
 458     register_event(mp, LengthChanged);
 459     register_event(mp, TitleChanged);
 460     register_event(mp, PausableChanged);
 461
 462     /* Snapshot initialization */
 463     register_event(mp, SnapshotTaken);
 464
 465     register_event(mp, MediaChanged);
 466
 467     /* Attach a var callback to the global object to provide the glue between
 468      * vout_thread that generates the event and media_player that re-emits it
 469      * with its own event manager
 470      *
 471      * FIXME: It's unclear why we want to put this in public API, and why we
 472      * want to expose it in such a limiting and ugly way.
 473      */
 474     var_AddCallback(mp->p_libvlc, "snapshot-file", snapshot_was_taken, mp);
 475
 476     libvlc_retain(instance);
 477     return mp;
 478 }
 479
 480 /**************************************************************************
 481  * Create a Media Instance object with a media descriptor.
 482  **************************************************************************/
 483 libvlc_media_player_t *
 484 libvlc_media_player_new_from_media( libvlc_media_t * p_md )
 485 {
 486     libvlc_media_player_t * p_mi;
 487
 488     p_mi = libvlc_media_player_new( p_md->p_libvlc_instance );
 489     if( !p_mi )
 490         return NULL;
 491
 492     libvlc_media_retain( p_md );
 493     p_mi->p_md = p_md;
 494
 495     return p_mi;
 496 }
 497
 498 /**************************************************************************
 499  * Destroy a Media Instance object (libvlc internal)
 500  *
 501  * Warning: No lock held here, but hey, this is internal. Caller must lock.
 502  **************************************************************************/
 503 static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi )
 504 {
 505     assert( p_mi );
 506
 507     /* Detach Callback from the main libvlc object */
 508     var_DelCallback( p_mi->p_libvlc,
 509                      "snapshot-file", snapshot_was_taken, p_mi );
 510
 511     /* No need for lock_input() because no other threads knows us anymore */
 512     if( p_mi->input.p_thread )
 513         release_input_thread(p_mi, true);
 514     if( p_mi->input.p_resource )
 515     {
 516         input_resource_Terminate( p_mi->input.p_resource );
 517         input_resource_Release( p_mi->input.p_resource );
 518         p_mi->input.p_resource = NULL;
 519     }
 520     vlc_mutex_destroy( &p_mi->input.lock );
 521
 522     libvlc_event_manager_release( p_mi->p_event_manager );
 523     libvlc_media_release( p_mi->p_md );
 524     vlc_mutex_destroy( &p_mi->object_lock );
 525
 526     libvlc_instance_t *instance = p_mi->p_libvlc_instance;
 527     vlc_object_release( p_mi );
 528     libvlc_release(instance);
 529 }
 530
 531 /**************************************************************************
 532  * Release a Media Instance object.
 533  *
 534  * Function does the locking.
 535  **************************************************************************/
 536 void libvlc_media_player_release( libvlc_media_player_t *p_mi )
 537 {
 538     bool destroy;
 539
 540     assert( p_mi );
 541     lock(p_mi);
 542     destroy = !--p_mi->i_refcount;
 543     unlock(p_mi);
 544
 545     if( destroy )
 546         libvlc_media_player_destroy( p_mi );
 547 }
 548
 549 /**************************************************************************
 550  * Retain a Media Instance object.
 551  *
 552  * Caller must hold the lock.
 553  **************************************************************************/
 554 void libvlc_media_player_retain( libvlc_media_player_t *p_mi )
 555 {
 556     assert( p_mi );
 557
 558     lock(p_mi);
 559     p_mi->i_refcount++;
 560     unlock(p_mi);
 561 }
 562
 563 /**************************************************************************
 564  * Set the Media descriptor associated with the instance.
 565  *
 566  * Enter without lock -- function will lock the object.
 567  **************************************************************************/
 568 void libvlc_media_player_set_media(
 569                             libvlc_media_player_t *p_mi,
 570                             libvlc_media_t *p_md )
 571 {
 572     lock_input(p_mi);
 573
 574     /* FIXME I am not sure if it is a user request or on die(eof/error)
 575      * request here */
 576     release_input_thread( p_mi,
 577                           p_mi->input.p_thread &&
 578                           !p_mi->input.p_thread->b_eof &&
 579                           !p_mi->input.p_thread->b_error );
 580
 581     lock( p_mi );
 582     set_state( p_mi, libvlc_NothingSpecial, true );
 583     unlock_input( p_mi );
 584
 585     libvlc_media_release( p_mi->p_md );
 586
 587     if( !p_md )
 588     {
 589         p_mi->p_md = NULL;
 590         unlock(p_mi);
 591         return; /* It is ok to pass a NULL md */
 592     }
 593
 594     libvlc_media_retain( p_md );
 595     p_mi->p_md = p_md;
 596
 597     /* The policy here is to ignore that we were created using a different
 598      * libvlc_instance, because we don't really care */
 599     p_mi->p_libvlc_instance = p_md->p_libvlc_instance;
 600
 601     unlock(p_mi);
 602
 603     /* Send an event for the newly available media */
 604     libvlc_event_t event;
 605     event.type = libvlc_MediaPlayerMediaChanged;
 606     event.u.media_player_media_changed.new_media = p_md;
 607     libvlc_event_send( p_mi->p_event_manager, &event );
 608
 609 }
 610
 611 /**************************************************************************
 612  * Get the Media descriptor associated with the instance.
 613  **************************************************************************/
 614 libvlc_media_t *
 615 libvlc_media_player_get_media( libvlc_media_player_t *p_mi )
 616 {
 617     libvlc_media_t *p_m;
 618
 619     lock(p_mi);
 620     p_m = p_mi->p_md;
 621     if( p_m )
 622         libvlc_media_retain( p_mi->p_md );
 623     unlock(p_mi);
 624     return p_mi->p_md;
 625 }
 626
 627 /**************************************************************************
 628  * Get the event Manager.
 629  **************************************************************************/
 630 libvlc_event_manager_t *
 631 libvlc_media_player_event_manager( libvlc_media_player_t *p_mi )
 632 {
 633     return p_mi->p_event_manager;
 634 }
 635
 636 /**************************************************************************
 637  * Tell media player to start playing.
 638  **************************************************************************/
 639 int libvlc_media_player_play( libvlc_media_player_t *p_mi )
 640 {
 641     lock_input( p_mi );
 642
 643     input_thread_t *p_input_thread = p_mi->input.p_thread;
 644     if( p_input_thread )
 645     {
 646         /* A thread already exists, send it a play message */
 647         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 648         unlock_input( p_mi );
 649         return 0;
 650     }
 651
 652     /* Ignore previous exception */
 653     lock(p_mi);
 654
 655     if( !p_mi->p_md )
 656     {
 657         unlock(p_mi);
 658         unlock_input( p_mi );
 659         libvlc_printerr( "No associated media descriptor" );
 660         return -1;
 661     }
 662
 663     if( !p_mi->input.p_resource )
 664         p_mi->input.p_resource = input_resource_New( VLC_OBJECT( p_mi ) );
 665     p_input_thread = input_Create( p_mi, p_mi->p_md->p_input_item, NULL,
 666                                    p_mi->input.p_resource );
 667     unlock(p_mi);
 668     if( !p_input_thread )
 669     {
 670         unlock_input(p_mi);
 671         libvlc_printerr( "Not enough memory" );
 672         return -1;
 673     }
 674
 675     var_AddCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 676     var_AddCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 677     var_AddCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 678
 679     if( input_Start( p_input_thread ) )
 680     {
 681         unlock_input(p_mi);
 682         var_DelCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 683         var_DelCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 684         var_DelCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 685         vlc_object_release( p_input_thread );
 686         libvlc_printerr( "Input initialization failure" );
 687         return -1;
 688     }
 689     p_mi->input.p_thread = p_input_thread;
 690     unlock_input(p_mi);
 691     return 0;
 692 }
 693
 694 void libvlc_media_player_set_pause( libvlc_media_player_t *p_mi, int paused )
 695 {
 696     input_thread_t * p_input_thread = libvlc_get_input_thread( p_mi );
 697     if( !p_input_thread )
 698         return;
 699
 700     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 701     if( state == libvlc_Playing || state == libvlc_Buffering )
 702     {
 703         if( paused )
 704         {
 705             if( libvlc_media_player_can_pause( p_mi ) )
 706                 input_Control( p_input_thread, INPUT_SET_STATE, PAUSE_S );
 707             else
 708                 libvlc_media_player_stop( p_mi );
 709         }
 710     }
 711     else
 712     {
 713         if( !paused )
 714             input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 715     }
 716
 717     vlc_object_release( p_input_thread );
 718 }
 719
 720 /**************************************************************************
 721  * Toggle pause.
 722  **************************************************************************/
 723 void libvlc_media_player_pause( libvlc_media_player_t *p_mi )
 724 {
 725     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 726     bool playing = (state == libvlc_Playing || state == libvlc_Buffering);
 727
 728     libvlc_media_player_set_pause( p_mi, playing );
 729 }
 730
 731 /**************************************************************************
 732  * Tells whether the media player is currently playing.
 733  *
 734  * Enter with lock held.
 735  **************************************************************************/
 736 int libvlc_media_player_is_playing( libvlc_media_player_t *p_mi )
 737 {
 738     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 739     return (libvlc_Playing == state) || (libvlc_Buffering == state);
 740 }
 741
 742 /**************************************************************************
 743  * Stop playing.
 744  **************************************************************************/
 745 void libvlc_media_player_stop( libvlc_media_player_t *p_mi )
 746 {
 747     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 748
 749     lock_input(p_mi);
 750     release_input_thread( p_mi, true ); /* This will stop the input thread */
 751
 752     /* Force to go to stopped state, in case we were in Ended, or Error
 753      * state. */
 754     if( state != libvlc_Stopped )
 755     {
 756         set_state( p_mi, libvlc_Stopped, false );
 757
 758         /* Construct and send the event */
 759         libvlc_event_t event;
 760         event.type = libvlc_MediaPlayerStopped;
 761         libvlc_event_send( p_mi->p_event_manager, &event );
 762     }
 763
 764     if( p_mi->input.p_resource != NULL )
 765         input_resource_TerminateVout( p_mi->input.p_resource );
 766     unlock_input(p_mi);
 767 }
 768
 769 /**************************************************************************
 770  * set_nsobject
 771  **************************************************************************/
 772 void libvlc_media_player_set_nsobject( libvlc_media_player_t *p_mi,
 773                                         void * drawable )
 774 {
 775     assert (p_mi != NULL);
 776 #ifdef __APPLE__
 777     var_SetAddress (p_mi, "drawable-nsobject", drawable);
 778 #else
 779     (void) p_mi; (void)drawable;
 780 #endif
 781 }
 782
 783 /**************************************************************************
 784  * get_nsobject
 785  **************************************************************************/
 786 void * libvlc_media_player_get_nsobject( libvlc_media_player_t *p_mi )
 787 {
 788     assert (p_mi != NULL);
 789 #ifdef __APPLE__
 790     return var_GetAddress (p_mi, "drawable-nsobject");
 791 #else
 792     return NULL;
 793 #endif
 794 }
 795
 796 /**************************************************************************
 797  * set_agl
 798  **************************************************************************/
 799 void libvlc_media_player_set_agl( libvlc_media_player_t *p_mi,
 800                                   uint32_t drawable )
 801 {
 802 #ifdef __APPLE__
 803     var_SetInteger (p_mi, "drawable-agl", drawable);
 804 #else
 805     (void) p_mi; (void)drawable;
 806 #endif
 807 }
 808
 809 /**************************************************************************
 810  * get_agl
 811  **************************************************************************/
 812 uint32_t libvlc_media_player_get_agl( libvlc_media_player_t *p_mi )
 813 {
 814     assert (p_mi != NULL);
 815 #ifdef __APPLE__
 816     return var_GetInteger (p_mi, "drawable-agl");
 817 #else
 818     return 0;
 819 #endif
 820 }
 821
 822 /**************************************************************************
 823  * set_xwindow
 824  **************************************************************************/
 825 void libvlc_media_player_set_xwindow( libvlc_media_player_t *p_mi,
 826                                       uint32_t drawable )
 827 {
 828     assert (p_mi != NULL);
 829     var_SetInteger (p_mi, "drawable-xid", drawable);
 830 }
 831
 832 /**************************************************************************
 833  * get_xwindow
 834  **************************************************************************/
 835 uint32_t libvlc_media_player_get_xwindow( libvlc_media_player_t *p_mi )
 836 {
 837     return var_GetInteger (p_mi, "drawable-xid");
 838 }
 839
 840 /**************************************************************************
 841  * set_hwnd
 842  **************************************************************************/
 843 void libvlc_media_player_set_hwnd( libvlc_media_player_t *p_mi,
 844                                    void *drawable )
 845 {
 846     assert (p_mi != NULL);
 847 #ifdef WIN32
 848     var_SetString (p_mi, "window", "embed-hwnd,any");
 849     var_SetAddress (p_mi, "drawable-hwnd", drawable);
 850 #else
 851     (void) p_mi; (void) drawable;
 852 #endif
 853 }
 854
 855 /**************************************************************************
 856  * get_hwnd
 857  **************************************************************************/
 858 void *libvlc_media_player_get_hwnd( libvlc_media_player_t *p_mi )
 859 {
 860     assert (p_mi != NULL);
 861 #ifdef WIN32
 862     return var_GetAddress (p_mi, "drawable-hwnd");
 863 #else
 864     return NULL;
 865 #endif
 866 }
 867
 868 /**************************************************************************
 869  * Getters for stream information
 870  **************************************************************************/
 871 libvlc_time_t libvlc_media_player_get_length(
 872                              libvlc_media_player_t *p_mi )
 873 {
 874     input_thread_t *p_input_thread;
 875     libvlc_time_t i_time;
 876
 877     p_input_thread = libvlc_get_input_thread ( p_mi );
 878     if( !p_input_thread )
 879         return -1;
 880
 881     i_time = from_mtime(var_GetTime( p_input_thread, "length" ));
 882     vlc_object_release( p_input_thread );
 883
 884     return i_time;
 885 }
 886
 887 libvlc_time_t libvlc_media_player_get_time( libvlc_media_player_t *p_mi )
 888 {
 889     input_thread_t *p_input_thread;
 890     libvlc_time_t i_time;
 891
 892     p_input_thread = libvlc_get_input_thread ( p_mi );
 893     if( !p_input_thread )
 894         return -1;
 895
 896     i_time = from_mtime(var_GetTime( p_input_thread , "time" ));
 897     vlc_object_release( p_input_thread );
 898     return i_time;
 899 }
 900
 901 void libvlc_media_player_set_time( libvlc_media_player_t *p_mi,
 902                                    libvlc_time_t i_time )
 903 {
 904     input_thread_t *p_input_thread;
 905
 906     p_input_thread = libvlc_get_input_thread ( p_mi );
 907     if( !p_input_thread )
 908         return;
 909
 910     var_SetTime( p_input_thread, "time", to_mtime(i_time) );
 911     vlc_object_release( p_input_thread );
 912 }
 913
 914 void libvlc_media_player_set_position( libvlc_media_player_t *p_mi,
 915                                        float position )
 916 {
 917     input_thread_t *p_input_thread;
 918
 919     p_input_thread = libvlc_get_input_thread ( p_mi );
 920     if( !p_input_thread )
 921         return;
 922
 923     var_SetFloat( p_input_thread, "position", position );
 924     vlc_object_release( p_input_thread );
 925 }
 926
 927 float libvlc_media_player_get_position( libvlc_media_player_t *p_mi )
 928 {
 929     input_thread_t *p_input_thread;
 930     float f_position;
 931
 932     p_input_thread = libvlc_get_input_thread ( p_mi );
 933     if( !p_input_thread )
 934         return -1.0;
 935
 936     f_position = var_GetFloat( p_input_thread, "position" );
 937     vlc_object_release( p_input_thread );
 938
 939     return f_position;
 940 }
 941
 942 void libvlc_media_player_set_chapter( libvlc_media_player_t *p_mi,
 943                                       int chapter )
 944 {
 945     input_thread_t *p_input_thread;
 946
 947     p_input_thread = libvlc_get_input_thread ( p_mi );
 948     if( !p_input_thread )
 949         return;
 950
 951     var_SetInteger( p_input_thread, "chapter", chapter );
 952     vlc_object_release( p_input_thread );
 953 }
 954
 955 int libvlc_media_player_get_chapter( libvlc_media_player_t *p_mi )
 956 {
 957     input_thread_t *p_input_thread;
 958     int i_chapter;
 959
 960     p_input_thread = libvlc_get_input_thread ( p_mi );
 961     if( !p_input_thread )
 962         return -1;
 963
 964     i_chapter = var_GetInteger( p_input_thread, "chapter" );
 965     vlc_object_release( p_input_thread );
 966
 967     return i_chapter;
 968 }
 969
 970 int libvlc_media_player_get_chapter_count( libvlc_media_player_t *p_mi )
 971 {
 972     input_thread_t *p_input_thread;
 973     vlc_value_t val;
 974
 975     p_input_thread = libvlc_get_input_thread ( p_mi );
 976     if( !p_input_thread )
 977         return -1;
 978
 979     var_Change( p_input_thread, "chapter", VLC_VAR_CHOICESCOUNT, &val, NULL );
 980     vlc_object_release( p_input_thread );
 981
 982     return val.i_int;
 983 }
 984
 985 int libvlc_media_player_get_chapter_count_for_title(
 986                                  libvlc_media_player_t *p_mi,
 987                                  int i_title )
 988 {
 989     input_thread_t *p_input_thread;
 990     vlc_value_t val;
 991
 992     p_input_thread = libvlc_get_input_thread ( p_mi );
 993     if( !p_input_thread )
 994         return -1;
 995
 996     char *psz_name;
 997     if( asprintf( &psz_name,  "title %2i", i_title ) == -1 )
 998     {
 999         vlc_object_release( p_input_thread );
1000         return -1;
1001     }
1002     var_Change( p_input_thread, psz_name, VLC_VAR_CHOICESCOUNT, &val, NULL );
1003     vlc_object_release( p_input_thread );
1004     free( psz_name );
1005
1006     return val.i_int;
1007 }
1008
1009 void libvlc_media_player_set_title( libvlc_media_player_t *p_mi,
1010                                     int i_title )
1011 {
1012     input_thread_t *p_input_thread;
1013
1014     p_input_thread = libvlc_get_input_thread ( p_mi );
1015     if( !p_input_thread )
1016         return;
1017
1018     var_SetInteger( p_input_thread, "title", i_title );
1019     vlc_object_release( p_input_thread );
1020
1021     //send event
1022     libvlc_event_t event;
1023     event.type = libvlc_MediaPlayerTitleChanged;
1024     event.u.media_player_title_changed.new_title = i_title;
1025     libvlc_event_send( p_mi->p_event_manager, &event );
1026 }
1027
1028 int libvlc_media_player_get_title( libvlc_media_player_t *p_mi )
1029 {
1030     input_thread_t *p_input_thread;
1031     int i_title;
1032
1033     p_input_thread = libvlc_get_input_thread ( p_mi );
1034     if( !p_input_thread )
1035         return -1;
1036
1037     i_title = var_GetInteger( p_input_thread, "title" );
1038     vlc_object_release( p_input_thread );
1039
1040     return i_title;
1041 }
1042
1043 int libvlc_media_player_get_title_count( libvlc_media_player_t *p_mi )
1044 {
1045     input_thread_t *p_input_thread;
1046     vlc_value_t val;
1047
1048     p_input_thread = libvlc_get_input_thread ( p_mi );
1049     if( !p_input_thread )
1050         return -1;
1051
1052     var_Change( p_input_thread, "title", VLC_VAR_CHOICESCOUNT, &val, NULL );
1053     vlc_object_release( p_input_thread );
1054
1055     return val.i_int;
1056 }
1057
1058 void libvlc_media_player_next_chapter( libvlc_media_player_t *p_mi )
1059 {
1060     input_thread_t *p_input_thread;
1061
1062     p_input_thread = libvlc_get_input_thread ( p_mi );
1063     if( !p_input_thread )
1064         return;
1065
1066     int i_type = var_Type( p_input_thread, "next-chapter" );
1067     var_SetBool( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1068                             "next-chapter":"next-title", true );
1069
1070     vlc_object_release( p_input_thread );
1071 }
1072
1073 void libvlc_media_player_previous_chapter( libvlc_media_player_t *p_mi )
1074 {
1075     input_thread_t *p_input_thread;
1076
1077     p_input_thread = libvlc_get_input_thread ( p_mi );
1078     if( !p_input_thread )
1079         return;
1080
1081     int i_type = var_Type( p_input_thread, "next-chapter" );
1082     var_SetBool( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1083                             "prev-chapter":"prev-title", true );
1084
1085     vlc_object_release( p_input_thread );
1086 }
1087
1088 float libvlc_media_player_get_fps( libvlc_media_player_t *p_mi )
1089 {
1090     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1091     double f_fps = 0.0;
1092
1093     if( p_input_thread )
1094     {
1095         if( input_Control( p_input_thread, INPUT_GET_VIDEO_FPS, &f_fps ) )
1096             f_fps = 0.0;
1097         vlc_object_release( p_input_thread );
1098     }
1099     return f_fps;
1100 }
1101
1102 int libvlc_media_player_will_play( libvlc_media_player_t *p_mi )
1103 {
1104     bool b_will_play;
1105     input_thread_t *p_input_thread =
1106                             libvlc_get_input_thread ( p_mi );
1107     if ( !p_input_thread )
1108         return false;
1109
1110     b_will_play = !p_input_thread->b_die && !p_input_thread->b_dead;
1111     vlc_object_release( p_input_thread );
1112
1113     return b_will_play;
1114 }
1115
1116 int libvlc_media_player_set_rate( libvlc_media_player_t *p_mi, float rate )
1117 {
1118     if (rate < 0.)
1119     {
1120         libvlc_printerr ("Playing backward not supported");
1121         return -1;
1122     }
1123
1124     var_SetFloat (p_mi, "rate", rate);
1125
1126     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1127     if( !p_input_thread )
1128         return 0;
1129     var_SetFloat( p_input_thread, "rate", rate );
1130     vlc_object_release( p_input_thread );
1131     return 0;
1132 }
1133
1134 float libvlc_media_player_get_rate( libvlc_media_player_t *p_mi )
1135 {
1136     return var_GetFloat (p_mi, "rate");
1137 }
1138
1139 libvlc_state_t libvlc_media_player_get_state( libvlc_media_player_t *p_mi )
1140 {
1141     lock(p_mi);
1142     libvlc_state_t state = p_mi->state;
1143     unlock(p_mi);
1144     return state;
1145 }
1146
1147 int libvlc_media_player_is_seekable( libvlc_media_player_t *p_mi )
1148 {
1149     input_thread_t *p_input_thread;
1150     bool b_seekable;
1151
1152     p_input_thread = libvlc_get_input_thread ( p_mi );
1153     if ( !p_input_thread )
1154         return false;
1155     b_seekable = var_GetBool( p_input_thread, "can-seek" );
1156     vlc_object_release( p_input_thread );
1157
1158     return b_seekable;
1159 }
1160
1161 /* internal function, used by audio, video */
1162 libvlc_track_description_t *
1163         libvlc_get_track_description( libvlc_media_player_t *p_mi,
1164                                       const char *psz_variable )
1165 {
1166     input_thread_t *p_input = libvlc_get_input_thread( p_mi );
1167     libvlc_track_description_t *p_track_description = NULL,
1168                                *p_actual, *p_previous;
1169
1170     if( !p_input )
1171         return NULL;
1172
1173     vlc_value_t val_list, text_list;
1174     var_Change( p_input, psz_variable, VLC_VAR_GETLIST, &val_list, &text_list);
1175
1176     /* no tracks */
1177     if( val_list.p_list->i_count <= 0 )
1178         goto end;
1179
1180     p_track_description = ( libvlc_track_description_t * )
1181         malloc( sizeof( libvlc_track_description_t ) );
1182     if ( !p_track_description )
1183     {
1184         libvlc_printerr( "Not enough memory" );
1185         goto end;
1186     }
1187     p_actual = p_track_description;
1188     p_previous = NULL;
1189     for( int i = 0; i < val_list.p_list->i_count; i++ )
1190     {
1191         if( !p_actual )
1192         {
1193             p_actual = ( libvlc_track_description_t * )
1194                 malloc( sizeof( libvlc_track_description_t ) );
1195             if ( !p_actual )
1196             {
1197                 libvlc_track_description_release( p_track_description );
1198                 libvlc_printerr( "Not enough memory" );
1199                 goto end;
1200             }
1201         }
1202         p_actual->i_id = val_list.p_list->p_values[i].i_int;
1203         p_actual->psz_name = strdup( text_list.p_list->p_values[i].psz_string );
1204         p_actual->p_next = NULL;
1205         if( p_previous )
1206             p_previous->p_next = p_actual;
1207         p_previous = p_actual;
1208         p_actual =  NULL;
1209     }
1210
1211 end:
1212     var_FreeList( &val_list, &text_list );
1213     vlc_object_release( p_input );
1214
1215     return p_track_description;
1216 }
1217
1218 void libvlc_track_description_release( libvlc_track_description_t *p_td )
1219 {
1220     libvlc_track_description_t *p_actual, *p_before;
1221     p_actual = p_td;
1222
1223     while ( p_actual )
1224     {
1225         free( p_actual->psz_name );
1226         p_before = p_actual;
1227         p_actual = p_before->p_next;
1228         free( p_before );
1229     }
1230 }
1231
1232 int libvlc_media_player_can_pause( libvlc_media_player_t *p_mi )
1233 {
1234     input_thread_t *p_input_thread;
1235     bool b_can_pause;
1236
1237     p_input_thread = libvlc_get_input_thread ( p_mi );
1238     if ( !p_input_thread )
1239         return false;
1240     b_can_pause = var_GetBool( p_input_thread, "can-pause" );
1241     vlc_object_release( p_input_thread );
1242
1243     return b_can_pause;
1244 }
1245
1246 void libvlc_media_player_next_frame( libvlc_media_player_t *p_mi )
1247 {
1248     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1249     if( p_input_thread != NULL )
1250     {
1251         var_TriggerCallback( p_input_thread, "frame-next" );
1252         vlc_object_release( p_input_thread );
1253     }
1254 }