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