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/vlc.h>
  31
  32 #include <vlc_interface.h>
  33
  34 #include <stdarg.h>
  35 #include <limits.h>
  36 #include <assert.h>
  37
  38 #include "../src/revision.c"
  39
  40 libvlc_instance_t * libvlc_new( int argc, const char *const *argv )
  41 {
  42     libvlc_threads_init ();
  43
  44     libvlc_instance_t *p_new = malloc (sizeof (*p_new));
  45     if (unlikely(p_new == NULL))
  46         return NULL;
  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->ref_count = 1;
  66     p_new->p_callback_list = NULL;
  67     vlc_mutex_init(&p_new->instance_lock);
  68     return p_new;
  69
  70 error:
  71     free (p_new);
  72     libvlc_threads_deinit ();
  73     return NULL;
  74 }
  75
  76 void libvlc_retain( libvlc_instance_t *p_instance )
  77 {
  78     assert( p_instance != NULL );
  79     assert( p_instance->ref_count < UINT_MAX );
  80
  81     vlc_mutex_lock( &p_instance->instance_lock );
  82     p_instance->ref_count++;
  83     vlc_mutex_unlock( &p_instance->instance_lock );
  84 }
  85
  86 void libvlc_release( libvlc_instance_t *p_instance )
  87 {
  88     vlc_mutex_t *lock = &p_instance->instance_lock;
  89     int refs;
  90
  91     vlc_mutex_lock( lock );
  92     assert( p_instance->ref_count > 0 );
  93     refs = --p_instance->ref_count;
  94     vlc_mutex_unlock( lock );
  95
  96     if( refs == 0 )
  97     {
  98         vlc_mutex_destroy( lock );
  99         libvlc_Quit( p_instance->p_libvlc_int );
 100         libvlc_InternalCleanup( p_instance->p_libvlc_int );
 101         libvlc_InternalDestroy( p_instance->p_libvlc_int );
 102         free( p_instance );
 103         libvlc_threads_deinit ();
 104     }
 105 }
 106
 107 void libvlc_set_exit_handler( libvlc_instance_t *p_i, void (*cb) (void *),
 108                               void *data )
 109 {
 110     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 111     libvlc_SetExitHandler( p_libvlc, cb, data );
 112 }
 113
 114 void libvlc_set_user_agent (libvlc_instance_t *p_i,
 115                             const char *name, const char *http)
 116 {
 117     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 118     char *str;
 119
 120     var_SetString (p_libvlc, "user-agent", name);
 121     if ((http != NULL)
 122      && (asprintf (&str, "%s LibVLC/"PACKAGE_VERSION, http) != -1))
 123     {
 124         var_SetString (p_libvlc, "http-user-agent", str);
 125         free (str);
 126     }
 127 }
 128
 129 void libvlc_set_app_id(libvlc_instance_t *p_i, const char *id,
 130                        const char *version, const char *icon)
 131 {
 132     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 133
 134     var_SetString(p_libvlc, "app-id", id ? id : "");
 135     var_SetString(p_libvlc, "app-version", version ? version : "");
 136     var_SetString(p_libvlc, "app-icon-name", icon ? icon : "");
 137 }
 138
 139 const char * libvlc_get_version(void)
 140 {
 141     return VERSION_MESSAGE;
 142 }
 143
 144 const char * libvlc_get_compiler(void)
 145 {
 146     return VLC_Compiler();
 147 }
 148
 149 const char * libvlc_get_changeset(void)
 150 {
 151     extern const char psz_vlc_changeset[];
 152     return psz_vlc_changeset;
 153 }
 154
 155 void libvlc_free( void *ptr )
 156 {
 157     free( ptr );
 158 }
 159
 160 static libvlc_module_description_t *module_description_list_get(
 161                 libvlc_instance_t *p_instance, const char *capability )
 162 {
 163     libvlc_module_description_t *p_list = NULL,
 164                           *p_actual = NULL,
 165                           *p_previous = NULL;
 166     size_t count;
 167     module_t **module_list = module_list_get( &count );
 168
 169     for (size_t i = 0; i < count; i++)
 170     {
 171         module_t *p_module = module_list[i];
 172
 173         if ( !module_provides( p_module, capability ) )
 174             continue;
 175
 176         p_actual = ( libvlc_module_description_t * ) malloc( sizeof( libvlc_module_description_t ) );
 177         if ( p_actual == NULL )
 178         {
 179             libvlc_printerr( "Not enough memory" );
 180             libvlc_module_description_list_release( p_list );
 181             module_list_free( module_list );
 182             return NULL;
 183         }
 184
 185         if ( p_list == NULL )
 186             p_list = p_actual;
 187
 188         const char* name = module_get_object( p_module );
 189         const char* shortname = module_get_name( p_module, false );
 190         const char* longname = module_get_name( p_module, true );
 191         const char* help = module_get_help( p_module );
 192         p_actual->psz_name = name ? strdup( name ) : NULL;
 193         p_actual->psz_shortname = shortname ? strdup( shortname ) : NULL;
 194         p_actual->psz_longname = longname ? strdup( longname ) : NULL;
 195         p_actual->psz_help = help ? strdup( help ) : NULL;
 196
 197         p_actual->p_next = NULL;
 198         if ( p_previous )
 199             p_previous->p_next = p_actual;
 200         p_previous = p_actual;
 201     }
 202
 203     module_list_free( module_list );
 204     VLC_UNUSED( p_instance );
 205     return p_list;
 206 }
 207
 208 void libvlc_module_description_list_release( libvlc_module_description_t *p_list )
 209 {
 210     libvlc_module_description_t *p_actual, *p_before;
 211     p_actual = p_list;
 212
 213     while ( p_actual )
 214     {
 215         free( p_actual->psz_name );
 216         free( p_actual->psz_shortname );
 217         free( p_actual->psz_longname );
 218         free( p_actual->psz_help );
 219         p_before = p_actual;
 220         p_actual = p_before->p_next;
 221         free( p_before );
 222     }
 223 }
 224
 225 libvlc_module_description_t *libvlc_audio_filter_list_get( libvlc_instance_t *p_instance )
 226 {
 227     return module_description_list_get( p_instance, "audio filter" );
 228 }
 229
 230 libvlc_module_description_t *libvlc_video_filter_list_get( libvlc_instance_t *p_instance )
 231 {
 232     return module_description_list_get( p_instance, "video filter" );
 233 }
 234
 235 int64_t libvlc_clock(void)
 236 {
 237     return US_FROM_VLC_TICK(vlc_tick_now());
 238 }
 239
 240 const char vlc_module_name[] = "libvlc";