src/control/core.c

   1 /*****************************************************************************
   2  * core.c: Core libvlc new API functions : initialization
   3  *****************************************************************************
   4  * Copyright (C) 2005 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 "libvlc_internal.h"
  29 #include <vlc/libvlc.h>
  30
  31 #include <vlc_interface.h>
  32 #include <vlc_vlm.h>
  33
  34 #include <stdarg.h>
  35 #include <limits.h>
  36 #include <assert.h>
  37
  38 static const char nomemstr[] = "Insufficient memory";
  39
  40 libvlc_instance_t * libvlc_new( int argc, const char *const *argv )
  41 {
  42     libvlc_instance_t *p_new = malloc (sizeof (*p_new));
  43     if (unlikely(p_new == NULL))
  44         return NULL;
  45
  46     libvlc_init_threads ();
  47
  48     const char *my_argv[argc + 2];
  49     my_argv[0] = "libvlc"; /* dummy arg0, skipped by getopt() et al */
  50     for( int i = 0; i < argc; i++ )
  51          my_argv[i + 1] = argv[i];
  52     my_argv[argc + 1] = NULL; /* C calling conventions require a NULL */
  53
  54     libvlc_int_t *p_libvlc_int = libvlc_InternalCreate();
  55     if (unlikely (p_libvlc_int == NULL))
  56         goto error;
  57
  58     if (libvlc_InternalInit( p_libvlc_int, argc + 1, my_argv ))
  59     {
  60         libvlc_InternalDestroy( p_libvlc_int );
  61         goto error;
  62     }
  63
  64     p_new->p_libvlc_int = p_libvlc_int;
  65     p_new->libvlc_vlm.p_vlm = NULL;
  66     p_new->libvlc_vlm.p_event_manager = NULL;
  67     p_new->libvlc_vlm.pf_release = NULL;
  68     p_new->ref_count = 1;
  69     p_new->verbosity = 1;
  70     p_new->p_callback_list = NULL;
  71     vlc_mutex_init(&p_new->instance_lock);
  72     var_Create( p_libvlc_int, "http-user-agent",
  73                 VLC_VAR_STRING|VLC_VAR_DOINHERIT );
  74     return p_new;
  75
  76 error:
  77     libvlc_deinit_threads ();
  78     free (p_new);
  79     return NULL;
  80 }
  81
  82 void libvlc_retain( libvlc_instance_t *p_instance )
  83 {
  84     assert( p_instance != NULL );
  85     assert( p_instance->ref_count < UINT_MAX );
  86
  87     vlc_mutex_lock( &p_instance->instance_lock );
  88     p_instance->ref_count++;
  89     vlc_mutex_unlock( &p_instance->instance_lock );
  90 }
  91
  92 void libvlc_release( libvlc_instance_t *p_instance )
  93 {
  94     vlc_mutex_t *lock = &p_instance->instance_lock;
  95     int refs;
  96
  97     vlc_mutex_lock( lock );
  98     assert( p_instance->ref_count > 0 );
  99     refs = --p_instance->ref_count;
 100     vlc_mutex_unlock( lock );
 101
 102     if( refs == 0 )
 103     {
 104         vlc_mutex_destroy( lock );
 105         if( p_instance->libvlc_vlm.pf_release )
 106             p_instance->libvlc_vlm.pf_release( p_instance );
 107         libvlc_InternalCleanup( p_instance->p_libvlc_int );
 108         libvlc_InternalDestroy( p_instance->p_libvlc_int );
 109         free( p_instance );
 110         libvlc_deinit_threads ();
 111     }
 112 }
 113
 114 int libvlc_add_intf( libvlc_instance_t *p_i, const char *name )
 115 {
 116     return libvlc_InternalAddIntf( p_i->p_libvlc_int, name ) ? -1 : 0;
 117 }
 118
 119 void libvlc_set_exit_handler( libvlc_instance_t *p_i, void (*cb) (void *),
 120                               void *data )
 121 {
 122     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 123     libvlc_SetExitHandler( p_libvlc, cb, data );
 124 }
 125
 126 void libvlc_wait( libvlc_instance_t *p_i )
 127 {
 128     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 129     libvlc_InternalWait( p_libvlc );
 130 }
 131
 132 void libvlc_set_user_agent (libvlc_instance_t *p_i,
 133                             const char *name, const char *http)
 134 {
 135     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 136
 137     var_SetString (p_libvlc, "user-agent", name);
 138     if (http != NULL)
 139         var_SetString (p_libvlc, "http-user-agent", http);
 140 }
 141
 142 const char * libvlc_get_version(void)
 143 {
 144     return VLC_Version();
 145 }
 146
 147 const char * libvlc_get_compiler(void)
 148 {
 149     return VLC_Compiler();
 150 }
 151
 152 const char * libvlc_get_changeset(void)
 153 {
 154     extern const char psz_vlc_changeset[];
 155     return psz_vlc_changeset;
 156 }