src/libvlc.c

   1 /*****************************************************************************
   2  * libvlc.c: libvlc instances creation and deletion, interfaces handling
   3  *****************************************************************************
   4  * Copyright (C) 1998-2008 VLC authors and VideoLAN
   5  *
   6  * Authors: Vincent Seguin <seguin@via.ecp.fr>
   7  *          Samuel Hocevar <sam@zoy.org>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *          Derk-Jan Hartman <hartman at videolan dot org>
  10  *          Rémi Denis-Courmont <rem # videolan : org>
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU Lesser General Public License as published by
  14  * the Free Software Foundation; either version 2.1 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  20  * GNU Lesser General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Lesser General Public License
  23  * along with this program; if not, write to the Free Software Foundation,
  24  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  25  *****************************************************************************/
  26
  27 /** \file
  28  * This file contains functions to create and destroy libvlc instances
  29  */
  30
  31 /*****************************************************************************
  32  * Preamble
  33  *****************************************************************************/
  34 #ifdef HAVE_CONFIG_H
  35 # include "config.h"
  36 #endif
  37
  38 #include <vlc_common.h>
  39 #include "../lib/libvlc_internal.h"
  40 #include <vlc_input.h>
  41
  42 #include "modules/modules.h"
  43 #include "config/configuration.h"
  44 #include "preparser/preparser.h"
  45 #include "media_source/media_source.h"
  46
  47 #include <stdio.h>                                              /* sprintf() */
  48 #include <string.h>
  49 #include <stdlib.h>                                                /* free() */
  50 #include <errno.h>
  51
  52 #include "config/vlc_getopt.h"
  53
  54 #include <vlc_playlist_legacy.h>
  55 #include <vlc_playlist.h>
  56 #include <vlc_interface.h>
  57
  58 #include <vlc_actions.h>
  59 #include <vlc_charset.h>
  60 #include <vlc_dialog.h>
  61 #include <vlc_keystore.h>
  62 #include <vlc_fs.h>
  63 #include <vlc_cpu.h>
  64 #include <vlc_url.h>
  65 #include <vlc_modules.h>
  66 #include <vlc_media_library.h>
  67 #include <vlc_thumbnailer.h>
  68
  69 #include "libvlc.h"
  70 #include "playlist_legacy/playlist_internal.h"
  71 #include "misc/variables.h"
  72 #include "input/player.h"
  73
  74 #include <vlc_vlm.h>
  75
  76 #include <assert.h>
  77
  78 /*****************************************************************************
  79  * Local prototypes
  80  *****************************************************************************/
  81 static void GetFilenames  ( libvlc_int_t *, unsigned, const char *const [] );
  82
  83 /**
  84  * Allocate a blank libvlc instance, also setting the exit handler.
  85  * Vlc's threading system must have been initialized first
  86  */
  87 libvlc_int_t * libvlc_InternalCreate( void )
  88 {
  89     libvlc_int_t *p_libvlc;
  90     libvlc_priv_t *priv;
  91
  92     /* Allocate a libvlc instance object */
  93     p_libvlc = (vlc_custom_create)( NULL, sizeof (*priv), "libvlc" );
  94     if( p_libvlc == NULL )
  95         return NULL;
  96
  97     priv = libvlc_priv (p_libvlc);
  98     priv->playlist = NULL;
  99     priv->main_playlist = NULL;
 100     priv->p_vlm = NULL;
 101     priv->media_source_provider = NULL;
 102
 103     vlc_ExitInit( &priv->exit );
 104
 105     return p_libvlc;
 106 }
 107
 108 static void
 109 PlaylistConfigureFromVariables(vlc_playlist_t *playlist, vlc_object_t *obj)
 110 {
 111     enum vlc_playlist_playback_order order;
 112     if (var_InheritBool(obj, "random"))
 113         order = VLC_PLAYLIST_PLAYBACK_ORDER_RANDOM;
 114     else
 115         order = VLC_PLAYLIST_PLAYBACK_ORDER_NORMAL;
 116
 117     /* repeat = repeat current; loop = repeat all */
 118     enum vlc_playlist_playback_repeat repeat;
 119     if (var_InheritBool(obj, "repeat"))
 120         repeat = VLC_PLAYLIST_PLAYBACK_REPEAT_CURRENT;
 121     else if (var_InheritBool(obj, "loop"))
 122         repeat = VLC_PLAYLIST_PLAYBACK_REPEAT_ALL;
 123     else
 124         repeat = VLC_PLAYLIST_PLAYBACK_REPEAT_NONE;
 125
 126     enum vlc_player_media_stopped_action media_stopped_action;
 127     if (var_InheritBool(obj, "play-and-exit"))
 128         media_stopped_action = VLC_PLAYER_MEDIA_STOPPED_EXIT;
 129     else if (var_InheritBool(obj, "play-and-stop"))
 130         media_stopped_action = VLC_PLAYER_MEDIA_STOPPED_STOP;
 131     else if (var_InheritBool(obj, "play-and-pause"))
 132         media_stopped_action = VLC_PLAYER_MEDIA_STOPPED_PAUSE;
 133     else
 134         media_stopped_action = VLC_PLAYER_MEDIA_STOPPED_CONTINUE;
 135
 136     bool start_paused = var_InheritBool(obj, "start-paused");
 137
 138     vlc_playlist_Lock(playlist);
 139     vlc_playlist_SetPlaybackOrder(playlist, order);
 140     vlc_playlist_SetPlaybackRepeat(playlist, repeat);
 141
 142     vlc_player_t *player = vlc_playlist_GetPlayer(playlist);
 143
 144     /* the playlist and the player share the same lock, and this is not an
 145      * implementation detail */
 146     vlc_player_SetMediaStoppedAction(player, media_stopped_action);
 147     vlc_player_SetStartPaused(player, start_paused);
 148
 149     vlc_playlist_Unlock(playlist);
 150 }
 151
 152 /**
 153  * Initialize a libvlc instance
 154  * This function initializes a previously allocated libvlc instance:
 155  *  - CPU detection
 156  *  - gettext initialization
 157  *  - message queue, module bank and playlist initialization
 158  *  - configuration and commandline parsing
 159  */
 160 int libvlc_InternalInit( libvlc_int_t *p_libvlc, int i_argc,
 161                          const char *ppsz_argv[] )
 162 {
 163     libvlc_priv_t *priv = libvlc_priv (p_libvlc);
 164     char *       psz_modules = NULL;
 165     char *       psz_parser = NULL;
 166     char *       psz_control = NULL;
 167     char        *psz_val;
 168     int          i_ret = VLC_EGENERIC;
 169
 170     if (unlikely(vlc_LogPreinit(p_libvlc)))
 171         return VLC_ENOMEM;
 172
 173     /* System specific initialization code */
 174     system_Init();
 175
 176     /* Initialize the module bank and load the configuration of the
 177      * core module. We need to do this at this stage to be able to display
 178      * a short help if required by the user. (short help == core module
 179      * options) */
 180     module_InitBank ();
 181
 182     /* Get command line options that affect module loading. */
 183     if( config_LoadCmdLine( p_libvlc, i_argc, ppsz_argv, NULL ) )
 184     {
 185         module_EndBank (false);
 186         return VLC_EGENERIC;
 187     }
 188
 189     vlc_threads_setup (p_libvlc);
 190
 191     /* Load the builtins and plugins into the module_bank.
 192      * We have to do it before config_Load*() because this also gets the
 193      * list of configuration options exported by each module and loads their
 194      * default values. */
 195     module_LoadPlugins (p_libvlc);
 196
 197     /*
 198      * Override default configuration with config file settings
 199      */
 200     if( !var_InheritBool( p_libvlc, "ignore-config" ) )
 201     {
 202         if( var_InheritBool( p_libvlc, "reset-config" ) )
 203             config_SaveConfigFile( p_libvlc ); /* Save default config */
 204         else
 205             config_LoadConfigFile( p_libvlc );
 206     }
 207
 208     /*
 209      * Override configuration with command line settings
 210      */
 211     int vlc_optind;
 212     if( config_LoadCmdLine( p_libvlc, i_argc, ppsz_argv, &vlc_optind ) )
 213         goto error;
 214
 215     vlc_LogInit(p_libvlc);
 216
 217     /*
 218      * Support for gettext
 219      */
 220 #if defined( ENABLE_NLS ) \
 221      && ( defined( HAVE_GETTEXT ) || defined( HAVE_INCLUDED_GETTEXT ) )
 222     vlc_bindtextdomain (PACKAGE_NAME);
 223 #endif
 224     /*xgettext: Translate "C" to the language code: "fr", "en_GB", "nl", "ru"... */
 225     msg_Dbg( p_libvlc, "translation test: code is \"%s\"", _("C") );
 226
 227     if (config_PrintHelp (VLC_OBJECT(p_libvlc)))
 228     {
 229         libvlc_InternalCleanup (p_libvlc);
 230         exit(0);
 231     }
 232
 233 #ifdef HAVE_DAEMON
 234     /* Check for daemon mode */
 235     if( var_InheritBool( p_libvlc, "daemon" ) )
 236     {
 237         if( daemon( 1, 0) != 0 )
 238         {
 239             msg_Err( p_libvlc, "Unable to fork vlc to daemon mode" );
 240             goto error;
 241         }
 242
 243         /* lets check if we need to write the pidfile */
 244         char *pidfile = var_InheritString( p_libvlc, "pidfile" );
 245         if( pidfile != NULL )
 246         {
 247             FILE *stream = vlc_fopen( pidfile, "w" );
 248             if( stream != NULL )
 249             {
 250                 fprintf( stream, "%d", (int)getpid() );
 251                 fclose( stream );
 252                 msg_Dbg( p_libvlc, "written PID file %s", pidfile );
 253             }
 254             else
 255                 msg_Err( p_libvlc, "cannot write PID file %s: %s",
 256                          pidfile, vlc_strerror_c(errno) );
 257             free( pidfile );
 258         }
 259     }
 260 #endif
 261
 262     i_ret = VLC_ENOMEM;
 263
 264     if( libvlc_InternalDialogInit( p_libvlc ) != VLC_SUCCESS )
 265         goto error;
 266     if( libvlc_InternalKeystoreInit( p_libvlc ) != VLC_SUCCESS )
 267         msg_Warn( p_libvlc, "memory keystore init failed" );
 268
 269     vlc_CPU_dump( VLC_OBJECT(p_libvlc) );
 270
 271     if( var_InheritBool( p_libvlc, "media-library") )
 272     {
 273         priv->p_media_library = libvlc_MlCreate( p_libvlc );
 274         if ( priv->p_media_library == NULL )
 275             msg_Warn( p_libvlc, "Media library initialization failed" );
 276     }
 277
 278     priv->p_thumbnailer = vlc_thumbnailer_Create( VLC_OBJECT( p_libvlc ) );
 279     if ( priv->p_thumbnailer == NULL )
 280         msg_Warn( p_libvlc, "Failed to instantiate VLC thumbnailer" );
 281
 282     /*
 283      * Initialize hotkey handling
 284      */
 285     if( libvlc_InternalActionsInit( p_libvlc ) != VLC_SUCCESS )
 286         goto error;
 287
 288     /*
 289      * Meta data handling
 290      */
 291     priv->parser = input_preparser_New(VLC_OBJECT(p_libvlc));
 292     if( !priv->parser )
 293         goto error;
 294
 295     priv->media_source_provider = vlc_media_source_provider_New( VLC_OBJECT( p_libvlc ) );
 296     if( !priv->media_source_provider )
 297         goto error;
 298
 299     /* variables for signalling creation of new files */
 300     var_Create( p_libvlc, "snapshot-file", VLC_VAR_STRING );
 301     var_Create( p_libvlc, "record-file", VLC_VAR_STRING );
 302
 303     /* some default internal settings */
 304     var_Create( p_libvlc, "window", VLC_VAR_STRING );
 305     /* NOTE: Because the playlist and interfaces start before this function
 306      * returns control to the application (DESIGN BUG!), all these variables
 307      * must be created (in place of libvlc_new()) and set to VLC defaults
 308      * (in place of VLC main()) *here*. */
 309     var_Create( p_libvlc, "user-agent", VLC_VAR_STRING );
 310     var_SetString( p_libvlc, "user-agent",
 311                    "VLC media player (LibVLC "VERSION")" );
 312     var_Create( p_libvlc, "http-user-agent", VLC_VAR_STRING );
 313     var_SetString( p_libvlc, "http-user-agent",
 314                    "VLC/"PACKAGE_VERSION" LibVLC/"PACKAGE_VERSION );
 315     var_Create( p_libvlc, "app-icon-name", VLC_VAR_STRING );
 316     var_SetString( p_libvlc, "app-icon-name", PACKAGE_NAME );
 317     var_Create( p_libvlc, "app-id", VLC_VAR_STRING );
 318     var_SetString( p_libvlc, "app-id", "org.VideoLAN.VLC" );
 319     var_Create( p_libvlc, "app-version", VLC_VAR_STRING );
 320     var_SetString( p_libvlc, "app-version", PACKAGE_VERSION );
 321
 322     /* System specific configuration */
 323     system_Configure( p_libvlc, i_argc - vlc_optind, ppsz_argv + vlc_optind );
 324
 325 #ifdef ENABLE_VLM
 326     /* Initialize VLM if vlm-conf is specified */
 327     psz_parser = var_InheritString( p_libvlc, "vlm-conf" );
 328     if( psz_parser )
 329     {
 330         priv->p_vlm = vlm_New( p_libvlc, psz_parser );
 331         if( !priv->p_vlm )
 332             msg_Err( p_libvlc, "VLM initialization failed" );
 333         free( psz_parser );
 334     }
 335 #endif
 336
 337     priv->main_playlist = vlc_playlist_New(VLC_OBJECT(p_libvlc));
 338     if (unlikely(!priv->main_playlist))
 339         goto error;
 340
 341     PlaylistConfigureFromVariables(priv->main_playlist, VLC_OBJECT(p_libvlc));
 342
 343     /*
 344      * Load background interfaces
 345      */
 346     psz_modules = var_InheritString( p_libvlc, "extraintf" );
 347     psz_control = var_InheritString( p_libvlc, "control" );
 348
 349     if( psz_modules && psz_control )
 350     {
 351         char* psz_tmp;
 352         if( asprintf( &psz_tmp, "%s:%s", psz_modules, psz_control ) != -1 )
 353         {
 354             free( psz_modules );
 355             psz_modules = psz_tmp;
 356         }
 357     }
 358     else if( psz_control )
 359     {
 360         free( psz_modules );
 361         psz_modules = strdup( psz_control );
 362     }
 363
 364     psz_parser = psz_modules;
 365     while ( psz_parser && *psz_parser )
 366     {
 367         char *psz_module, *psz_temp;
 368         psz_module = psz_parser;
 369         psz_parser = strchr( psz_module, ':' );
 370         if ( psz_parser )
 371         {
 372             *psz_parser = '\0';
 373             psz_parser++;
 374         }
 375         if( asprintf( &psz_temp, "%s,none", psz_module ) != -1)
 376         {
 377             libvlc_InternalAddIntf( p_libvlc, psz_temp );
 378             free( psz_temp );
 379         }
 380     }
 381     free( psz_modules );
 382     free( psz_control );
 383
 384     if( var_InheritBool( p_libvlc, "network-synchronisation") )
 385         libvlc_InternalAddIntf( p_libvlc, "netsync,none" );
 386
 387 #ifdef __APPLE__
 388     var_Create( p_libvlc, "drawable-view-top", VLC_VAR_INTEGER );
 389     var_Create( p_libvlc, "drawable-view-left", VLC_VAR_INTEGER );
 390     var_Create( p_libvlc, "drawable-view-bottom", VLC_VAR_INTEGER );
 391     var_Create( p_libvlc, "drawable-view-right", VLC_VAR_INTEGER );
 392     var_Create( p_libvlc, "drawable-clip-top", VLC_VAR_INTEGER );
 393     var_Create( p_libvlc, "drawable-clip-left", VLC_VAR_INTEGER );
 394     var_Create( p_libvlc, "drawable-clip-bottom", VLC_VAR_INTEGER );
 395     var_Create( p_libvlc, "drawable-clip-right", VLC_VAR_INTEGER );
 396     var_Create( p_libvlc, "drawable-nsobject", VLC_VAR_ADDRESS );
 397 #endif
 398
 399     /*
 400      * Get input filenames given as commandline arguments.
 401      * We assume that the remaining parameters are filenames
 402      * and their input options.
 403      */
 404     GetFilenames( p_libvlc, i_argc - vlc_optind, ppsz_argv + vlc_optind );
 405
 406     /*
 407      * Get --open argument
 408      */
 409     psz_val = var_InheritString( p_libvlc, "open" );
 410     if ( psz_val != NULL )
 411     {
 412         intf_InsertItem( p_libvlc, psz_val, 0, NULL, 0 );
 413         free( psz_val );
 414     }
 415
 416     return VLC_SUCCESS;
 417
 418 error:
 419     libvlc_InternalCleanup( p_libvlc );
 420     return i_ret;
 421 }
 422
 423 /**
 424  * Cleanup a libvlc instance. The instance is not completely deallocated
 425  * \param p_libvlc the instance to clean
 426  */
 427 void libvlc_InternalCleanup( libvlc_int_t *p_libvlc )
 428 {
 429     libvlc_priv_t *priv = libvlc_priv (p_libvlc);
 430
 431     if (priv->parser != NULL)
 432         input_preparser_Deactivate(priv->parser);
 433
 434     /* Ask the interfaces to stop and destroy them */
 435     msg_Dbg( p_libvlc, "removing all interfaces" );
 436     intf_DestroyAll( p_libvlc );
 437
 438     if ( priv->p_thumbnailer )
 439         vlc_thumbnailer_Release( priv->p_thumbnailer );
 440
 441     if ( priv->p_media_library )
 442         libvlc_MlRelease( priv->p_media_library );
 443
 444     if( priv->media_source_provider )
 445         vlc_media_source_provider_Delete( priv->media_source_provider );
 446
 447     libvlc_InternalDialogClean( p_libvlc );
 448     libvlc_InternalKeystoreClean( p_libvlc );
 449
 450 #ifdef ENABLE_VLM
 451     /* Destroy VLM if created in libvlc_InternalInit */
 452     if( priv->p_vlm )
 453     {
 454         vlm_Delete( priv->p_vlm );
 455     }
 456 #endif
 457
 458 #if !defined( _WIN32 ) && !defined( __OS2__ )
 459     char *pidfile = var_InheritString( p_libvlc, "pidfile" );
 460     if( pidfile != NULL )
 461     {
 462         msg_Dbg( p_libvlc, "removing PID file %s", pidfile );
 463         if( unlink( pidfile ) )
 464             msg_Warn( p_libvlc, "cannot remove PID file %s: %s",
 465                       pidfile, vlc_strerror_c(errno) );
 466         free( pidfile );
 467     }
 468 #endif
 469
 470     if (priv->parser != NULL)
 471         input_preparser_Delete(priv->parser);
 472
 473     if (priv->main_playlist)
 474         vlc_playlist_Delete(priv->main_playlist);
 475
 476     libvlc_InternalActionsClean( p_libvlc );
 477
 478     /* Save the configuration */
 479     if( !var_InheritBool( p_libvlc, "ignore-config" ) )
 480         config_AutoSaveConfigFile( VLC_OBJECT(p_libvlc) );
 481
 482     /* Free module bank. It is refcounted, so we call this each time  */
 483     vlc_LogDeinit (p_libvlc);
 484     module_EndBank (true);
 485 #if defined(_WIN32) || defined(__OS2__)
 486     system_End( );
 487 #endif
 488 }
 489
 490 /**
 491  * Destroy everything.
 492  * This function requests the running threads to finish, waits for their
 493  * termination, and destroys their structure.
 494  * It stops the thread systems: no instance can run after this has run
 495  * \param p_libvlc the instance to destroy
 496  */
 497 void libvlc_InternalDestroy( libvlc_int_t *p_libvlc )
 498 {
 499     libvlc_priv_t *priv = libvlc_priv( p_libvlc );
 500
 501     vlc_ExitDestroy( &priv->exit );
 502
 503     assert( atomic_load(&(vlc_internals(p_libvlc)->refs)) == 1 );
 504     vlc_object_release( p_libvlc );
 505 }
 506
 507 /*****************************************************************************
 508  * GetFilenames: parse command line options which are not flags
 509  *****************************************************************************
 510  * Parse command line for input files as well as their associated options.
 511  * An option always follows its associated input and begins with a ":".
 512  *****************************************************************************/
 513 static void GetFilenames( libvlc_int_t *p_vlc, unsigned n,
 514                           const char *const args[] )
 515 {
 516     while( n > 0 )
 517     {
 518         /* Count the input options */
 519         unsigned i_options = 0;
 520
 521         while( args[--n][0] == ':' )
 522         {
 523             i_options++;
 524             if( n == 0 )
 525             {
 526                 msg_Warn( p_vlc, "options %s without item", args[n] );
 527                 return; /* syntax!? */
 528             }
 529         }
 530
 531         char *mrl = NULL;
 532         if( strstr( args[n], "://" ) == NULL )
 533         {
 534             mrl = vlc_path2uri( args[n], NULL );
 535             if( !mrl )
 536                 continue;
 537         }
 538
 539         intf_InsertItem( p_vlc, (mrl != NULL) ? mrl : args[n], i_options,
 540                          ( i_options ? &args[n + 1] : NULL ),
 541                          VLC_INPUT_OPTION_TRUSTED );
 542         free( mrl );
 543     }
 544 }
 545
 546 int vlc_MetadataRequest(libvlc_int_t *libvlc, input_item_t *item,
 547                         input_item_meta_request_option_t i_options,
 548                         const input_preparser_callbacks_t *cbs,
 549                         void *cbs_userdata,
 550                         int timeout, void *id)
 551 {
 552     libvlc_priv_t *priv = libvlc_priv(libvlc);
 553
 554     if (unlikely(priv->parser == NULL))
 555         return VLC_ENOMEM;
 556
 557     if( i_options & META_REQUEST_OPTION_DO_INTERACT )
 558     {
 559         vlc_mutex_lock( &item->lock );
 560         item->b_preparse_interact = true;
 561         vlc_mutex_unlock( &item->lock );
 562     }
 563     input_preparser_Push( priv->parser, item, i_options, cbs, cbs_userdata, timeout, id );
 564     return VLC_SUCCESS;
 565
 566 }
 567
 568 /**
 569  * Requests extraction of the meta data for an input item (a.k.a. preparsing).
 570  * The actual extraction is asynchronous. It can be cancelled with
 571  * libvlc_MetadataCancel()
 572  */
 573 int libvlc_MetadataRequest(libvlc_int_t *libvlc, input_item_t *item,
 574                            input_item_meta_request_option_t i_options,
 575                            const input_preparser_callbacks_t *cbs,
 576                            void *cbs_userdata,
 577                            int timeout, void *id)
 578 {
 579     libvlc_priv_t *priv = libvlc_priv(libvlc);
 580
 581     if (unlikely(priv->parser == NULL))
 582         return VLC_ENOMEM;
 583
 584     vlc_mutex_lock( &item->lock );
 585     if( item->i_preparse_depth == 0 )
 586         item->i_preparse_depth = 1;
 587     vlc_mutex_unlock( &item->lock );
 588
 589     return vlc_MetadataRequest(libvlc, item, i_options, cbs, cbs_userdata, timeout, id);
 590 }
 591
 592 /**
 593  * Requests retrieving/downloading art for an input item.
 594  * The retrieval is performed asynchronously.
 595  */
 596 int libvlc_ArtRequest(libvlc_int_t *libvlc, input_item_t *item,
 597                       input_item_meta_request_option_t i_options,
 598                       const input_fetcher_callbacks_t *cbs,
 599                       void *cbs_userdata)
 600 {
 601     libvlc_priv_t *priv = libvlc_priv(libvlc);
 602
 603     if (unlikely(priv->parser == NULL))
 604         return VLC_ENOMEM;
 605
 606     input_preparser_fetcher_Push(priv->parser, item, i_options, cbs, cbs_userdata);
 607     return VLC_SUCCESS;
 608 }
 609
 610 /**
 611  * Cancels extraction of the meta data for an input item.
 612  *
 613  * This does nothing if the input item is already processed or if it was not
 614  * added with libvlc_MetadataRequest()
 615  */
 616 void libvlc_MetadataCancel(libvlc_int_t *libvlc, void *id)
 617 {
 618     libvlc_priv_t *priv = libvlc_priv(libvlc);
 619
 620     if (unlikely(priv->parser == NULL))
 621         return;
 622
 623     input_preparser_Cancel(priv->parser, id);
 624 }