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     else if( newval.i_int == INPUT_EVENT_CACHE )
 303     {
 304         event.type = libvlc_MediaPlayerBuffering;
 305         event.u.media_player_buffering.new_cache = (int)(100 *
 306             var_GetFloat( p_input, "cache" ));
 307         libvlc_event_send( p_mi->p_event_manager, &event );
 308     }
 309
 310     return VLC_SUCCESS;
 311 }
 312
 313 /**************************************************************************
 314  * Snapshot Taken Event.
 315  *
 316  * FIXME: This snapshot API interface makes no sense in media_player.
 317  *************************************************************************/
 318 static int snapshot_was_taken(vlc_object_t *p_this, char const *psz_cmd,
 319                               vlc_value_t oldval, vlc_value_t newval, void *p_data )
 320 {
 321     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_this);
 322
 323     libvlc_media_player_t *mp = p_data;
 324     libvlc_event_t event;
 325     event.type = libvlc_MediaPlayerSnapshotTaken;
 326     event.u.media_player_snapshot_taken.psz_filename = newval.psz_string;
 327     libvlc_event_send(mp->p_event_manager, &event);
 328
 329     return VLC_SUCCESS;
 330 }
 331
 332 static input_thread_t *find_input (vlc_object_t *obj)
 333 {
 334     libvlc_media_player_t *mp = (libvlc_media_player_t *)obj;
 335
 336     return libvlc_get_input_thread (mp);
 337 }
 338
 339 /* */
 340 static void libvlc_media_player_destroy( libvlc_media_player_t * );
 341
 342
 343 /**************************************************************************
 344  * Create a Media Instance object.
 345  *
 346  * Refcount strategy:
 347  * - All items created by _new start with a refcount set to 1.
 348  * - Accessor _release decrease the refcount by 1, if after that
 349  *   operation the refcount is 0, the object is destroyed.
 350  * - Accessor _retain increase the refcount by 1 (XXX: to implement)
 351  *
 352  * Object locking strategy:
 353  * - No lock held while in constructor.
 354  * - When accessing any member variable this lock is held. (XXX who locks?)
 355  * - When attempting to destroy the object the lock is also held.
 356  **************************************************************************/
 357 libvlc_media_player_t *
 358 libvlc_media_player_new( libvlc_instance_t *instance )
 359 {
 360     libvlc_media_player_t * mp;
 361
 362     assert(instance);
 363
 364     mp = vlc_object_create (instance->p_libvlc_int, sizeof(*mp));
 365     if (unlikely(mp == NULL))
 366     {
 367         libvlc_printerr("Not enough memory");
 368         return NULL;
 369     }
 370     vlc_object_attach (mp, mp->p_libvlc);
 371
 372     /* Input */
 373     var_Create (mp, "rate", VLC_VAR_FLOAT|VLC_VAR_DOINHERIT);
 374
 375     /* Video */
 376     var_Create (mp, "vout", VLC_VAR_STRING|VLC_VAR_DOINHERIT);
 377     var_Create (mp, "window", VLC_VAR_STRING);
 378     var_Create (mp, "vmem-lock", VLC_VAR_ADDRESS);
 379     var_Create (mp, "vmem-unlock", VLC_VAR_ADDRESS);
 380     var_Create (mp, "vmem-display", VLC_VAR_ADDRESS);
 381     var_Create (mp, "vmem-data", VLC_VAR_ADDRESS);
 382     var_Create (mp, "vmem-chroma", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 383     var_Create (mp, "vmem-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 384     var_Create (mp, "vmem-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 385     var_Create (mp, "vmem-pitch", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 386     var_Create (mp, "drawable-xid", VLC_VAR_INTEGER);
 387 #ifdef WIN32
 388     var_Create (mp, "drawable-hwnd", VLC_VAR_ADDRESS);
 389 #endif
 390 #ifdef __APPLE__
 391     var_Create (mp, "drawable-agl", VLC_VAR_INTEGER);
 392     var_Create (mp, "drawable-nsobject", VLC_VAR_ADDRESS);
 393 #endif
 394
 395     var_Create (mp, "keyboard-events", VLC_VAR_BOOL);
 396     var_SetBool (mp, "keyboard-events", true);
 397     var_Create (mp, "mouse-events", VLC_VAR_BOOL);
 398     var_SetBool (mp, "mouse-events", true);
 399
 400     var_Create (mp, "fullscreen", VLC_VAR_BOOL);
 401     var_Create (mp, "autoscale", VLC_VAR_BOOL);
 402     var_SetBool (mp, "autoscale", true);
 403     var_Create (mp, "scale", VLC_VAR_FLOAT);
 404     var_SetFloat (mp, "scale", 1.);
 405     var_Create (mp, "aspect-ratio", VLC_VAR_STRING);
 406     var_Create (mp, "crop", VLC_VAR_STRING);
 407     var_Create (mp, "deinterlace", VLC_VAR_INTEGER);
 408     var_Create (mp, "deinterlace-mode", VLC_VAR_STRING);
 409
 410     var_Create (mp, "vbi-page", VLC_VAR_INTEGER);
 411
 412     var_Create (mp, "marq-marquee", VLC_VAR_STRING);
 413     var_Create (mp, "marq-color", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 414     var_Create (mp, "marq-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 415     var_Create (mp, "marq-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 416     var_Create (mp, "marq-refresh", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 417     var_Create (mp, "marq-size", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 418     var_Create (mp, "marq-timeout", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 419     var_Create (mp, "marq-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 420     var_Create (mp, "marq-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 421
 422     var_Create (mp, "logo-file", VLC_VAR_STRING);
 423     var_Create (mp, "logo-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 424     var_Create (mp, "logo-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 425     var_Create (mp, "logo-delay", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 426     var_Create (mp, "logo-repeat", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 427     var_Create (mp, "logo-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 428     var_Create (mp, "logo-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 429
 430     var_Create (mp, "contrast", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 431     var_Create (mp, "brightness", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 432     var_Create (mp, "hue", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 433     var_Create (mp, "saturation", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 434     var_Create (mp, "gamma", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 435
 436      /* Audio */
 437     var_Create (mp, "aout", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 438     var_Create (mp, "volume-muted", VLC_VAR_BOOL);
 439     var_Create (mp, "saved-volume", VLC_VAR_INTEGER);
 440     var_Create (mp, "volume-change", VLC_VAR_VOID);
 441     var_Create (mp, "find-input-callback", VLC_VAR_ADDRESS);
 442     var_SetAddress (mp, "find-input-callback", find_input);
 443
 444     mp->p_md = NULL;
 445     mp->state = libvlc_NothingSpecial;
 446     mp->p_libvlc_instance = instance;
 447     mp->input.p_thread = NULL;
 448     mp->input.p_resource = NULL;
 449     vlc_mutex_init (&mp->input.lock);
 450     mp->i_refcount = 1;
 451     mp->p_event_manager = libvlc_event_manager_new(mp, instance);
 452     if (unlikely(mp->p_event_manager == NULL))
 453     {
 454         vlc_object_release(mp);
 455         return NULL;
 456     }
 457     vlc_mutex_init(&mp->object_lock);
 458
 459     register_event(mp, NothingSpecial);
 460     register_event(mp, Opening);
 461     register_event(mp, Buffering);
 462     register_event(mp, Playing);
 463     register_event(mp, Paused);
 464     register_event(mp, Stopped);
 465     register_event(mp, Forward);
 466     register_event(mp, Backward);
 467     register_event(mp, EndReached);
 468     register_event(mp, EncounteredError);
 469     register_event(mp, SeekableChanged);
 470
 471     register_event(mp, PositionChanged);
 472     register_event(mp, TimeChanged);
 473     register_event(mp, LengthChanged);
 474     register_event(mp, TitleChanged);
 475     register_event(mp, PausableChanged);
 476
 477     /* Snapshot initialization */
 478     register_event(mp, SnapshotTaken);
 479
 480     register_event(mp, MediaChanged);
 481
 482     /* Attach a var callback to the global object to provide the glue between
 483      * vout_thread that generates the event and media_player that re-emits it
 484      * with its own event manager
 485      *
 486      * FIXME: It's unclear why we want to put this in public API, and why we
 487      * want to expose it in such a limiting and ugly way.
 488      */
 489     var_AddCallback(mp->p_libvlc, "snapshot-file", snapshot_was_taken, mp);
 490
 491     libvlc_retain(instance);
 492     return mp;
 493 }
 494
 495 /**************************************************************************
 496  * Create a Media Instance object with a media descriptor.
 497  **************************************************************************/
 498 libvlc_media_player_t *
 499 libvlc_media_player_new_from_media( libvlc_media_t * p_md )
 500 {
 501     libvlc_media_player_t * p_mi;
 502
 503     p_mi = libvlc_media_player_new( p_md->p_libvlc_instance );
 504     if( !p_mi )
 505         return NULL;
 506
 507     libvlc_media_retain( p_md );
 508     p_mi->p_md = p_md;
 509
 510     return p_mi;
 511 }
 512
 513 /**************************************************************************
 514  * Destroy a Media Instance object (libvlc internal)
 515  *
 516  * Warning: No lock held here, but hey, this is internal. Caller must lock.
 517  **************************************************************************/
 518 static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi )
 519 {
 520     assert( p_mi );
 521
 522     /* Detach Callback from the main libvlc object */
 523     var_DelCallback( p_mi->p_libvlc,
 524                      "snapshot-file", snapshot_was_taken, p_mi );
 525
 526     /* No need for lock_input() because no other threads knows us anymore */
 527     if( p_mi->input.p_thread )
 528         release_input_thread(p_mi, true);
 529     if( p_mi->input.p_resource )
 530     {
 531         input_resource_Terminate( p_mi->input.p_resource );
 532         input_resource_Release( p_mi->input.p_resource );
 533         p_mi->input.p_resource = NULL;
 534     }
 535     vlc_mutex_destroy( &p_mi->input.lock );
 536
 537     libvlc_event_manager_release( p_mi->p_event_manager );
 538     libvlc_media_release( p_mi->p_md );
 539     vlc_mutex_destroy( &p_mi->object_lock );
 540
 541     libvlc_instance_t *instance = p_mi->p_libvlc_instance;
 542     vlc_object_release( p_mi );
 543     libvlc_release(instance);
 544 }
 545
 546 /**************************************************************************
 547  * Release a Media Instance object.
 548  *
 549  * Function does the locking.
 550  **************************************************************************/
 551 void libvlc_media_player_release( libvlc_media_player_t *p_mi )
 552 {
 553     bool destroy;
 554
 555     assert( p_mi );
 556     lock(p_mi);
 557     destroy = !--p_mi->i_refcount;
 558     unlock(p_mi);
 559
 560     if( destroy )
 561         libvlc_media_player_destroy( p_mi );
 562 }
 563
 564 /**************************************************************************
 565  * Retain a Media Instance object.
 566  *
 567  * Caller must hold the lock.
 568  **************************************************************************/
 569 void libvlc_media_player_retain( libvlc_media_player_t *p_mi )
 570 {
 571     assert( p_mi );
 572
 573     lock(p_mi);
 574     p_mi->i_refcount++;
 575     unlock(p_mi);
 576 }
 577
 578 /**************************************************************************
 579  * Set the Media descriptor associated with the instance.
 580  *
 581  * Enter without lock -- function will lock the object.
 582  **************************************************************************/
 583 void libvlc_media_player_set_media(
 584                             libvlc_media_player_t *p_mi,
 585                             libvlc_media_t *p_md )
 586 {
 587     lock_input(p_mi);
 588
 589     /* FIXME I am not sure if it is a user request or on die(eof/error)
 590      * request here */
 591     release_input_thread( p_mi,
 592                           p_mi->input.p_thread &&
 593                           !p_mi->input.p_thread->b_eof &&
 594                           !p_mi->input.p_thread->b_error );
 595
 596     lock( p_mi );
 597     set_state( p_mi, libvlc_NothingSpecial, true );
 598     unlock_input( p_mi );
 599
 600     libvlc_media_release( p_mi->p_md );
 601
 602     if( !p_md )
 603     {
 604         p_mi->p_md = NULL;
 605         unlock(p_mi);
 606         return; /* It is ok to pass a NULL md */
 607     }
 608
 609     libvlc_media_retain( p_md );
 610     p_mi->p_md = p_md;
 611
 612     /* The policy here is to ignore that we were created using a different
 613      * libvlc_instance, because we don't really care */
 614     p_mi->p_libvlc_instance = p_md->p_libvlc_instance;
 615
 616     unlock(p_mi);
 617
 618     /* Send an event for the newly available media */
 619     libvlc_event_t event;
 620     event.type = libvlc_MediaPlayerMediaChanged;
 621     event.u.media_player_media_changed.new_media = p_md;
 622     libvlc_event_send( p_mi->p_event_manager, &event );
 623
 624 }
 625
 626 /**************************************************************************
 627  * Get the Media descriptor associated with the instance.
 628  **************************************************************************/
 629 libvlc_media_t *
 630 libvlc_media_player_get_media( libvlc_media_player_t *p_mi )
 631 {
 632     libvlc_media_t *p_m;
 633
 634     lock(p_mi);
 635     p_m = p_mi->p_md;
 636     if( p_m )
 637         libvlc_media_retain( p_mi->p_md );
 638     unlock(p_mi);
 639     return p_mi->p_md;
 640 }
 641
 642 /**************************************************************************
 643  * Get the event Manager.
 644  **************************************************************************/
 645 libvlc_event_manager_t *
 646 libvlc_media_player_event_manager( libvlc_media_player_t *p_mi )
 647 {
 648     return p_mi->p_event_manager;
 649 }
 650
 651 /**************************************************************************
 652  * Tell media player to start playing.
 653  **************************************************************************/
 654 int libvlc_media_player_play( libvlc_media_player_t *p_mi )
 655 {
 656     lock_input( p_mi );
 657
 658     input_thread_t *p_input_thread = p_mi->input.p_thread;
 659     if( p_input_thread )
 660     {
 661         /* A thread already exists, send it a play message */
 662         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 663         unlock_input( p_mi );
 664         return 0;
 665     }
 666
 667     /* Ignore previous exception */
 668     lock(p_mi);
 669
 670     if( !p_mi->p_md )
 671     {
 672         unlock(p_mi);
 673         unlock_input( p_mi );
 674         libvlc_printerr( "No associated media descriptor" );
 675         return -1;
 676     }
 677
 678     if( !p_mi->input.p_resource )
 679         p_mi->input.p_resource = input_resource_New( VLC_OBJECT( p_mi ) );
 680     p_input_thread = input_Create( p_mi, p_mi->p_md->p_input_item, NULL,
 681                                    p_mi->input.p_resource );
 682     unlock(p_mi);
 683     if( !p_input_thread )
 684     {
 685         unlock_input(p_mi);
 686         libvlc_printerr( "Not enough memory" );
 687         return -1;
 688     }
 689
 690     var_AddCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 691     var_AddCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 692     var_AddCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 693
 694     if( input_Start( p_input_thread ) )
 695     {
 696         unlock_input(p_mi);
 697         var_DelCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 698         var_DelCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 699         var_DelCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 700         vlc_object_release( p_input_thread );
 701         libvlc_printerr( "Input initialization failure" );
 702         return -1;
 703     }
 704     p_mi->input.p_thread = p_input_thread;
 705     unlock_input(p_mi);
 706     return 0;
 707 }
 708
 709 void libvlc_media_player_set_pause( libvlc_media_player_t *p_mi, int paused )
 710 {
 711     input_thread_t * p_input_thread = libvlc_get_input_thread( p_mi );
 712     if( !p_input_thread )
 713         return;
 714
 715     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 716     if( state == libvlc_Playing || state == libvlc_Buffering )
 717     {
 718         if( paused )
 719         {
 720             if( libvlc_media_player_can_pause( p_mi ) )
 721                 input_Control( p_input_thread, INPUT_SET_STATE, PAUSE_S );
 722             else
 723                 libvlc_media_player_stop( p_mi );
 724         }
 725     }
 726     else
 727     {
 728         if( !paused )
 729             input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 730     }
 731
 732     vlc_object_release( p_input_thread );
 733 }
 734
 735 /**************************************************************************
 736  * Toggle pause.
 737  **************************************************************************/
 738 void libvlc_media_player_pause( libvlc_media_player_t *p_mi )
 739 {
 740     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 741     bool playing = (state == libvlc_Playing || state == libvlc_Buffering);
 742
 743     libvlc_media_player_set_pause( p_mi, playing );
 744 }
 745
 746 /**************************************************************************
 747  * Tells whether the media player is currently playing.
 748  *
 749  * Enter with lock held.
 750  **************************************************************************/
 751 int libvlc_media_player_is_playing( libvlc_media_player_t *p_mi )
 752 {
 753     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 754     return (libvlc_Playing == state) || (libvlc_Buffering == state);
 755 }
 756
 757 /**************************************************************************
 758  * Stop playing.
 759  **************************************************************************/
 760 void libvlc_media_player_stop( libvlc_media_player_t *p_mi )
 761 {
 762     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 763
 764     lock_input(p_mi);
 765     release_input_thread( p_mi, true ); /* This will stop the input thread */
 766
 767     /* Force to go to stopped state, in case we were in Ended, or Error
 768      * state. */
 769     if( state != libvlc_Stopped )
 770     {
 771         set_state( p_mi, libvlc_Stopped, false );
 772
 773         /* Construct and send the event */
 774         libvlc_event_t event;
 775         event.type = libvlc_MediaPlayerStopped;
 776         libvlc_event_send( p_mi->p_event_manager, &event );
 777     }
 778
 779     if( p_mi->input.p_resource != NULL )
 780         input_resource_TerminateVout( p_mi->input.p_resource );
 781     unlock_input(p_mi);
 782 }
 783
 784
 785 void libvlc_video_set_callbacks( libvlc_media_player_t *mp,
 786     void *(*lock_cb) (void *, void **),
 787     void (*unlock_cb) (void *, void *, void *const *),
 788     void (*display_cb) (void *, void *),
 789     void *opaque )
 790 {
 791     var_SetAddress( mp, "vmem-lock", lock_cb );
 792     var_SetAddress( mp, "vmem-unlock", unlock_cb );
 793     var_SetAddress( mp, "vmem-display", display_cb );
 794     var_SetAddress( mp, "vmem-data", opaque );
 795     var_SetString( mp, "vout", "vmem" );
 796 }
 797
 798 void libvlc_video_set_format( libvlc_media_player_t *mp, const char *chroma,
 799                               unsigned width, unsigned height, unsigned pitch )
 800 {
 801     var_SetString( mp, "vmem-chroma", chroma );
 802     var_SetInteger( mp, "vmem-width", width );
 803     var_SetInteger( mp, "vmem-height", height );
 804     var_SetInteger( mp, "vmem-pitch", pitch );
 805 }
 806
 807 /**************************************************************************
 808  * set_nsobject
 809  **************************************************************************/
 810 void libvlc_media_player_set_nsobject( libvlc_media_player_t *p_mi,
 811                                         void * drawable )
 812 {
 813     assert (p_mi != NULL);
 814 #ifdef __APPLE__
 815     var_SetAddress (p_mi, "drawable-nsobject", drawable);
 816 #else
 817     (void) p_mi; (void)drawable;
 818 #endif
 819 }
 820
 821 /**************************************************************************
 822  * get_nsobject
 823  **************************************************************************/
 824 void * libvlc_media_player_get_nsobject( libvlc_media_player_t *p_mi )
 825 {
 826     assert (p_mi != NULL);
 827 #ifdef __APPLE__
 828     return var_GetAddress (p_mi, "drawable-nsobject");
 829 #else
 830     return NULL;
 831 #endif
 832 }
 833
 834 /**************************************************************************
 835  * set_agl
 836  **************************************************************************/
 837 void libvlc_media_player_set_agl( libvlc_media_player_t *p_mi,
 838                                   uint32_t drawable )
 839 {
 840 #ifdef __APPLE__
 841     var_SetInteger (p_mi, "drawable-agl", drawable);
 842 #else
 843     (void) p_mi; (void)drawable;
 844 #endif
 845 }
 846
 847 /**************************************************************************
 848  * get_agl
 849  **************************************************************************/
 850 uint32_t libvlc_media_player_get_agl( libvlc_media_player_t *p_mi )
 851 {
 852     assert (p_mi != NULL);
 853 #ifdef __APPLE__
 854     return var_GetInteger (p_mi, "drawable-agl");
 855 #else
 856     return 0;
 857 #endif
 858 }
 859
 860 /**************************************************************************
 861  * set_xwindow
 862  **************************************************************************/
 863 void libvlc_media_player_set_xwindow( libvlc_media_player_t *p_mi,
 864                                       uint32_t drawable )
 865 {
 866     assert (p_mi != NULL);
 867
 868     var_SetString (p_mi, "vout", drawable ? "xid" : "any");
 869     var_SetString (p_mi, "window", drawable ? "embed-xid,any" : "any");
 870     var_SetInteger (p_mi, "drawable-xid", drawable);
 871 }
 872
 873 /**************************************************************************
 874  * get_xwindow
 875  **************************************************************************/
 876 uint32_t libvlc_media_player_get_xwindow( libvlc_media_player_t *p_mi )
 877 {
 878     return var_GetInteger (p_mi, "drawable-xid");
 879 }
 880
 881 /**************************************************************************
 882  * set_hwnd
 883  **************************************************************************/
 884 void libvlc_media_player_set_hwnd( libvlc_media_player_t *p_mi,
 885                                    void *drawable )
 886 {
 887     assert (p_mi != NULL);
 888 #ifdef WIN32
 889     var_SetString (p_mi, "window",
 890                    (drawable != NULL) ? "embed-hwnd,any" : "");
 891     var_SetAddress (p_mi, "drawable-hwnd", drawable);
 892 #else
 893     (void) p_mi; (void) drawable;
 894 #endif
 895 }
 896
 897 /**************************************************************************
 898  * get_hwnd
 899  **************************************************************************/
 900 void *libvlc_media_player_get_hwnd( libvlc_media_player_t *p_mi )
 901 {
 902     assert (p_mi != NULL);
 903 #ifdef WIN32
 904     return var_GetAddress (p_mi, "drawable-hwnd");
 905 #else
 906     return NULL;
 907 #endif
 908 }
 909
 910 /**************************************************************************
 911  * Getters for stream information
 912  **************************************************************************/
 913 libvlc_time_t libvlc_media_player_get_length(
 914                              libvlc_media_player_t *p_mi )
 915 {
 916     input_thread_t *p_input_thread;
 917     libvlc_time_t i_time;
 918
 919     p_input_thread = libvlc_get_input_thread ( p_mi );
 920     if( !p_input_thread )
 921         return -1;
 922
 923     i_time = from_mtime(var_GetTime( p_input_thread, "length" ));
 924     vlc_object_release( p_input_thread );
 925
 926     return i_time;
 927 }
 928
 929 libvlc_time_t libvlc_media_player_get_time( libvlc_media_player_t *p_mi )
 930 {
 931     input_thread_t *p_input_thread;
 932     libvlc_time_t i_time;
 933
 934     p_input_thread = libvlc_get_input_thread ( p_mi );
 935     if( !p_input_thread )
 936         return -1;
 937
 938     i_time = from_mtime(var_GetTime( p_input_thread , "time" ));
 939     vlc_object_release( p_input_thread );
 940     return i_time;
 941 }
 942
 943 void libvlc_media_player_set_time( libvlc_media_player_t *p_mi,
 944                                    libvlc_time_t i_time )
 945 {
 946     input_thread_t *p_input_thread;
 947
 948     p_input_thread = libvlc_get_input_thread ( p_mi );
 949     if( !p_input_thread )
 950         return;
 951
 952     var_SetTime( p_input_thread, "time", to_mtime(i_time) );
 953     vlc_object_release( p_input_thread );
 954 }
 955
 956 void libvlc_media_player_set_position( libvlc_media_player_t *p_mi,
 957                                        float position )
 958 {
 959     input_thread_t *p_input_thread;
 960
 961     p_input_thread = libvlc_get_input_thread ( p_mi );
 962     if( !p_input_thread )
 963         return;
 964
 965     var_SetFloat( p_input_thread, "position", position );
 966     vlc_object_release( p_input_thread );
 967 }
 968
 969 float libvlc_media_player_get_position( libvlc_media_player_t *p_mi )
 970 {
 971     input_thread_t *p_input_thread;
 972     float f_position;
 973
 974     p_input_thread = libvlc_get_input_thread ( p_mi );
 975     if( !p_input_thread )
 976         return -1.0;
 977
 978     f_position = var_GetFloat( p_input_thread, "position" );
 979     vlc_object_release( p_input_thread );
 980
 981     return f_position;
 982 }
 983
 984 void libvlc_media_player_set_chapter( libvlc_media_player_t *p_mi,
 985                                       int chapter )
 986 {
 987     input_thread_t *p_input_thread;
 988
 989     p_input_thread = libvlc_get_input_thread ( p_mi );
 990     if( !p_input_thread )
 991         return;
 992
 993     var_SetInteger( p_input_thread, "chapter", chapter );
 994     vlc_object_release( p_input_thread );
 995 }
 996
 997 int libvlc_media_player_get_chapter( libvlc_media_player_t *p_mi )
 998 {
 999     input_thread_t *p_input_thread;
1000     int i_chapter;
1001
1002     p_input_thread = libvlc_get_input_thread ( p_mi );
1003     if( !p_input_thread )
1004         return -1;
1005
1006     i_chapter = var_GetInteger( p_input_thread, "chapter" );
1007     vlc_object_release( p_input_thread );
1008
1009     return i_chapter;
1010 }
1011
1012 int libvlc_media_player_get_chapter_count( libvlc_media_player_t *p_mi )
1013 {
1014     input_thread_t *p_input_thread;
1015     vlc_value_t val;
1016
1017     p_input_thread = libvlc_get_input_thread ( p_mi );
1018     if( !p_input_thread )
1019         return -1;
1020
1021     var_Change( p_input_thread, "chapter", VLC_VAR_CHOICESCOUNT, &val, NULL );
1022     vlc_object_release( p_input_thread );
1023
1024     return val.i_int;
1025 }
1026
1027 int libvlc_media_player_get_chapter_count_for_title(
1028                                  libvlc_media_player_t *p_mi,
1029                                  int i_title )
1030 {
1031     input_thread_t *p_input_thread;
1032     vlc_value_t val;
1033
1034     p_input_thread = libvlc_get_input_thread ( p_mi );
1035     if( !p_input_thread )
1036         return -1;
1037
1038     char *psz_name;
1039     if( asprintf( &psz_name,  "title %2i", i_title ) == -1 )
1040     {
1041         vlc_object_release( p_input_thread );
1042         return -1;
1043     }
1044     var_Change( p_input_thread, psz_name, VLC_VAR_CHOICESCOUNT, &val, NULL );
1045     vlc_object_release( p_input_thread );
1046     free( psz_name );
1047
1048     return val.i_int;
1049 }
1050
1051 void libvlc_media_player_set_title( libvlc_media_player_t *p_mi,
1052                                     int i_title )
1053 {
1054     input_thread_t *p_input_thread;
1055
1056     p_input_thread = libvlc_get_input_thread ( p_mi );
1057     if( !p_input_thread )
1058         return;
1059
1060     var_SetInteger( p_input_thread, "title", i_title );
1061     vlc_object_release( p_input_thread );
1062
1063     //send event
1064     libvlc_event_t event;
1065     event.type = libvlc_MediaPlayerTitleChanged;
1066     event.u.media_player_title_changed.new_title = i_title;
1067     libvlc_event_send( p_mi->p_event_manager, &event );
1068 }
1069
1070 int libvlc_media_player_get_title( libvlc_media_player_t *p_mi )
1071 {
1072     input_thread_t *p_input_thread;
1073     int i_title;
1074
1075     p_input_thread = libvlc_get_input_thread ( p_mi );
1076     if( !p_input_thread )
1077         return -1;
1078
1079     i_title = var_GetInteger( p_input_thread, "title" );
1080     vlc_object_release( p_input_thread );
1081
1082     return i_title;
1083 }
1084
1085 int libvlc_media_player_get_title_count( libvlc_media_player_t *p_mi )
1086 {
1087     input_thread_t *p_input_thread;
1088     vlc_value_t val;
1089
1090     p_input_thread = libvlc_get_input_thread ( p_mi );
1091     if( !p_input_thread )
1092         return -1;
1093
1094     var_Change( p_input_thread, "title", VLC_VAR_CHOICESCOUNT, &val, NULL );
1095     vlc_object_release( p_input_thread );
1096
1097     return val.i_int;
1098 }
1099
1100 void libvlc_media_player_next_chapter( libvlc_media_player_t *p_mi )
1101 {
1102     input_thread_t *p_input_thread;
1103
1104     p_input_thread = libvlc_get_input_thread ( p_mi );
1105     if( !p_input_thread )
1106         return;
1107
1108     int i_type = var_Type( p_input_thread, "next-chapter" );
1109     var_SetBool( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1110                             "next-chapter":"next-title", true );
1111
1112     vlc_object_release( p_input_thread );
1113 }
1114
1115 void libvlc_media_player_previous_chapter( libvlc_media_player_t *p_mi )
1116 {
1117     input_thread_t *p_input_thread;
1118
1119     p_input_thread = libvlc_get_input_thread ( p_mi );
1120     if( !p_input_thread )
1121         return;
1122
1123     int i_type = var_Type( p_input_thread, "next-chapter" );
1124     var_SetBool( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1125                             "prev-chapter":"prev-title", true );
1126
1127     vlc_object_release( p_input_thread );
1128 }
1129
1130 float libvlc_media_player_get_fps( libvlc_media_player_t *p_mi )
1131 {
1132     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1133     double f_fps = 0.0;
1134
1135     if( p_input_thread )
1136     {
1137         if( input_Control( p_input_thread, INPUT_GET_VIDEO_FPS, &f_fps ) )
1138             f_fps = 0.0;
1139         vlc_object_release( p_input_thread );
1140     }
1141     return f_fps;
1142 }
1143
1144 int libvlc_media_player_will_play( libvlc_media_player_t *p_mi )
1145 {
1146     bool b_will_play;
1147     input_thread_t *p_input_thread =
1148                             libvlc_get_input_thread ( p_mi );
1149     if ( !p_input_thread )
1150         return false;
1151
1152     b_will_play = !p_input_thread->b_die && !p_input_thread->b_dead;
1153     vlc_object_release( p_input_thread );
1154
1155     return b_will_play;
1156 }
1157
1158 int libvlc_media_player_set_rate( libvlc_media_player_t *p_mi, float rate )
1159 {
1160     if (rate < 0.)
1161     {
1162         libvlc_printerr ("Playing backward not supported");
1163         return -1;
1164     }
1165
1166     var_SetFloat (p_mi, "rate", rate);
1167
1168     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1169     if( !p_input_thread )
1170         return 0;
1171     var_SetFloat( p_input_thread, "rate", rate );
1172     vlc_object_release( p_input_thread );
1173     return 0;
1174 }
1175
1176 float libvlc_media_player_get_rate( libvlc_media_player_t *p_mi )
1177 {
1178     return var_GetFloat (p_mi, "rate");
1179 }
1180
1181 libvlc_state_t libvlc_media_player_get_state( libvlc_media_player_t *p_mi )
1182 {
1183     lock(p_mi);
1184     libvlc_state_t state = p_mi->state;
1185     unlock(p_mi);
1186     return state;
1187 }
1188
1189 int libvlc_media_player_is_seekable( libvlc_media_player_t *p_mi )
1190 {
1191     input_thread_t *p_input_thread;
1192     bool b_seekable;
1193
1194     p_input_thread = libvlc_get_input_thread ( p_mi );
1195     if ( !p_input_thread )
1196         return false;
1197     b_seekable = var_GetBool( p_input_thread, "can-seek" );
1198     vlc_object_release( p_input_thread );
1199
1200     return b_seekable;
1201 }
1202
1203 /* internal function, used by audio, video */
1204 libvlc_track_description_t *
1205         libvlc_get_track_description( libvlc_media_player_t *p_mi,
1206                                       const char *psz_variable )
1207 {
1208     input_thread_t *p_input = libvlc_get_input_thread( p_mi );
1209     libvlc_track_description_t *p_track_description = NULL,
1210                                *p_actual, *p_previous;
1211
1212     if( !p_input )
1213         return NULL;
1214
1215     vlc_value_t val_list, text_list;
1216     var_Change( p_input, psz_variable, VLC_VAR_GETLIST, &val_list, &text_list);
1217
1218     /* no tracks */
1219     if( val_list.p_list->i_count <= 0 )
1220         goto end;
1221
1222     p_track_description = ( libvlc_track_description_t * )
1223         malloc( sizeof( libvlc_track_description_t ) );
1224     if ( !p_track_description )
1225     {
1226         libvlc_printerr( "Not enough memory" );
1227         goto end;
1228     }
1229     p_actual = p_track_description;
1230     p_previous = NULL;
1231     for( int i = 0; i < val_list.p_list->i_count; i++ )
1232     {
1233         if( !p_actual )
1234         {
1235             p_actual = ( libvlc_track_description_t * )
1236                 malloc( sizeof( libvlc_track_description_t ) );
1237             if ( !p_actual )
1238             {
1239                 libvlc_track_description_release( p_track_description );
1240                 libvlc_printerr( "Not enough memory" );
1241                 goto end;
1242             }
1243         }
1244         p_actual->i_id = val_list.p_list->p_values[i].i_int;
1245         p_actual->psz_name = strdup( text_list.p_list->p_values[i].psz_string );
1246         p_actual->p_next = NULL;
1247         if( p_previous )
1248             p_previous->p_next = p_actual;
1249         p_previous = p_actual;
1250         p_actual =  NULL;
1251     }
1252
1253 end:
1254     var_FreeList( &val_list, &text_list );
1255     vlc_object_release( p_input );
1256
1257     return p_track_description;
1258 }
1259
1260 void libvlc_track_description_release( libvlc_track_description_t *p_td )
1261 {
1262     libvlc_track_description_t *p_actual, *p_before;
1263     p_actual = p_td;
1264
1265     while ( p_actual )
1266     {
1267         free( p_actual->psz_name );
1268         p_before = p_actual;
1269         p_actual = p_before->p_next;
1270         free( p_before );
1271     }
1272 }
1273
1274 int libvlc_media_player_can_pause( libvlc_media_player_t *p_mi )
1275 {
1276     input_thread_t *p_input_thread;
1277     bool b_can_pause;
1278
1279     p_input_thread = libvlc_get_input_thread ( p_mi );
1280     if ( !p_input_thread )
1281         return false;
1282     b_can_pause = var_GetBool( p_input_thread, "can-pause" );
1283     vlc_object_release( p_input_thread );
1284
1285     return b_can_pause;
1286 }
1287
1288 void libvlc_media_player_next_frame( libvlc_media_player_t *p_mi )
1289 {
1290     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1291     if( p_input_thread != NULL )
1292     {
1293         var_TriggerCallback( p_input_thread, "frame-next" );
1294         vlc_object_release( p_input_thread );
1295     }
1296 }