lib/core.c

   1 /*****************************************************************************
   2  * core.c: Core libvlc new API functions : initialization
   3  *****************************************************************************
   4  * Copyright (C) 2005 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Clément Stenac <zorglub@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * 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_modules.h>
  30 #include <vlc/libvlc.h>
  31
  32 #include <vlc_interface.h>
  33 #include <vlc_vlm.h>
  34
  35 #include <stdarg.h>
  36 #include <limits.h>
  37 #include <assert.h>
  38
  39 static const char nomemstr[] = "Insufficient memory";
  40
  41 libvlc_instance_t * libvlc_new( int argc, const char *const *argv )
  42 {
  43     libvlc_instance_t *p_new = malloc (sizeof (*p_new));
  44     if (unlikely(p_new == NULL))
  45         return NULL;
  46
  47     libvlc_init_threads ();
  48
  49     const char *my_argv[argc + 2];
  50     my_argv[0] = "libvlc"; /* dummy arg0, skipped by getopt() et al */
  51     for( int i = 0; i < argc; i++ )
  52          my_argv[i + 1] = argv[i];
  53     my_argv[argc + 1] = NULL; /* C calling conventions require a NULL */
  54
  55     libvlc_int_t *p_libvlc_int = libvlc_InternalCreate();
  56     if (unlikely (p_libvlc_int == NULL))
  57         goto error;
  58
  59     if (libvlc_InternalInit( p_libvlc_int, argc + 1, my_argv ))
  60     {
  61         libvlc_InternalDestroy( p_libvlc_int );
  62         goto error;
  63     }
  64
  65     p_new->p_libvlc_int = p_libvlc_int;
  66     p_new->libvlc_vlm.p_vlm = NULL;
  67     p_new->libvlc_vlm.p_event_manager = NULL;
  68     p_new->libvlc_vlm.pf_release = NULL;
  69     p_new->ref_count = 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     if( libvlc_InternalAddIntf( p_i->p_libvlc_int, name ))
 117     {
 118         if( name )
 119         {
 120             libvlc_printerr("interface \"%s\" initialization failed",
 121                 name );
 122         }
 123         else
 124         {
 125             libvlc_printerr("default interface initialization failed");
 126         }
 127         return -1;
 128     }
 129     return 0;
 130 }
 131
 132 void libvlc_set_exit_handler( libvlc_instance_t *p_i, void (*cb) (void *),
 133                               void *data )
 134 {
 135     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 136     libvlc_SetExitHandler( p_libvlc, cb, data );
 137 }
 138
 139 void libvlc_wait( libvlc_instance_t *p_i )
 140 {
 141     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 142     libvlc_InternalWait( p_libvlc );
 143 }
 144
 145 void libvlc_set_user_agent (libvlc_instance_t *p_i,
 146                             const char *name, const char *http)
 147 {
 148     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 149     char *str;
 150
 151     var_SetString (p_libvlc, "user-agent", name);
 152     if ((http != NULL)
 153      && (asprintf (&str, "%s LibVLC/"PACKAGE_VERSION, http) != -1))
 154     {
 155         var_SetString (p_libvlc, "http-user-agent", str);
 156         free (str);
 157     }
 158 }
 159
 160 const char * libvlc_get_version(void)
 161 {
 162     return VERSION_MESSAGE;
 163 }
 164
 165 const char * libvlc_get_compiler(void)
 166 {
 167     return VLC_Compiler();
 168 }
 169
 170 const char * libvlc_get_changeset(void)
 171 {
 172     extern const char psz_vlc_changeset[];
 173     return psz_vlc_changeset;
 174 }
 175
 176 void libvlc_free( void *ptr )
 177 {
 178     free( ptr );
 179 }
 180
 181 static libvlc_module_description_t *module_description_list_get(
 182                 libvlc_instance_t *p_instance, const char *capability )
 183 {
 184     VLC_UNUSED( p_instance );
 185     libvlc_module_description_t *p_list = NULL,
 186                           *p_actual = NULL,
 187                           *p_previous = NULL;
 188     module_t **module_list = module_list_get( NULL );
 189
 190     for (size_t i = 0; module_list[i]; i++)
 191     {
 192         module_t *p_module = module_list[i];
 193
 194         if ( !module_provides( p_module, capability ) )
 195             continue;
 196
 197         p_actual = ( libvlc_module_description_t * ) malloc( sizeof( libvlc_module_description_t ) );
 198         if ( p_actual == NULL )
 199         {
 200             libvlc_printerr( "Not enough memory" );
 201             libvlc_module_description_list_release( p_list );
 202             module_list_free( module_list );
 203             return NULL;
 204         }
 205
 206         if ( p_list == NULL )
 207             p_list = p_actual;
 208
 209         const char* name = module_get_object( p_module );
 210         const char* shortname = module_get_name( p_module, false );
 211         const char* longname = module_get_name( p_module, true );
 212         const char* help = module_get_help( p_module );
 213         p_actual->psz_name = name ? strdup( name ) : NULL;
 214         p_actual->psz_shortname = shortname ? strdup( shortname ) : NULL;
 215         p_actual->psz_longname = longname ? strdup( longname ) : NULL;
 216         p_actual->psz_help = help ? strdup( help ) : NULL;
 217
 218         p_actual->p_next = NULL;
 219         if ( p_previous )
 220             p_previous->p_next = p_actual;
 221         p_previous = p_actual;
 222     }
 223
 224     module_list_free( module_list );
 225     return p_list;
 226 }
 227
 228 void libvlc_module_description_list_release( libvlc_module_description_t *p_list )
 229 {
 230     libvlc_module_description_t *p_actual, *p_before;
 231     p_actual = p_list;
 232
 233     while ( p_actual )
 234     {
 235         free( p_actual->psz_name );
 236         free( p_actual->psz_shortname );
 237         free( p_actual->psz_longname );
 238         free( p_actual->psz_help );
 239         p_before = p_actual;
 240         p_actual = p_before->p_next;
 241         free( p_before );
 242     }
 243 }
 244
 245 libvlc_module_description_t *libvlc_audio_filter_list_get( libvlc_instance_t *p_instance )
 246 {
 247     return module_description_list_get( p_instance, "audio filter" );
 248 }
 249
 250 libvlc_module_description_t *libvlc_video_filter_list_get( libvlc_instance_t *p_instance )
 251 {
 252     return module_description_list_get( p_instance, "video filter2" );
 253 }
 254
 255 int64_t libvlc_clock(void)
 256 {
 257     return mdate();
 258 }