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 #include <vlc_vlm.h>
  34
  35 #include <stdarg.h>
  36 #include <limits.h>
  37 #include <assert.h>
  38
  39 #include "../src/revision.c"
  40
  41 libvlc_instance_t * libvlc_new( int argc, const char *const *argv )
  42 {
  43     libvlc_threads_init ();
  44
  45     libvlc_instance_t *p_new = malloc (sizeof (*p_new));
  46     if (unlikely(p_new == NULL))
  47         return NULL;
  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->vlm = NULL;
  67     p_new->ref_count = 1;
  68     p_new->p_callback_list = NULL;
  69     vlc_mutex_init(&p_new->instance_lock);
  70     return p_new;
  71
  72 error:
  73     free (p_new);
  74     libvlc_threads_deinit ();
  75     return NULL;
  76 }
  77
  78 void libvlc_retain( libvlc_instance_t *p_instance )
  79 {
  80     assert( p_instance != NULL );
  81     assert( p_instance->ref_count < UINT_MAX );
  82
  83     vlc_mutex_lock( &p_instance->instance_lock );
  84     p_instance->ref_count++;
  85     vlc_mutex_unlock( &p_instance->instance_lock );
  86 }
  87
  88 void libvlc_release( libvlc_instance_t *p_instance )
  89 {
  90     vlc_mutex_t *lock = &p_instance->instance_lock;
  91     int refs;
  92
  93     vlc_mutex_lock( lock );
  94     assert( p_instance->ref_count > 0 );
  95     refs = --p_instance->ref_count;
  96     vlc_mutex_unlock( lock );
  97
  98     if( refs == 0 )
  99     {
 100         vlc_mutex_destroy( lock );
 101         if( p_instance->vlm != NULL )
 102             libvlc_vlm_release( p_instance );
 103         libvlc_Quit( p_instance->p_libvlc_int );
 104         libvlc_InternalCleanup( p_instance->p_libvlc_int );
 105         libvlc_InternalDestroy( p_instance->p_libvlc_int );
 106         free( p_instance );
 107         libvlc_threads_deinit ();
 108     }
 109 }
 110
 111 void libvlc_set_exit_handler( libvlc_instance_t *p_i, void (*cb) (void *),
 112                               void *data )
 113 {
 114     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 115     libvlc_SetExitHandler( p_libvlc, cb, data );
 116 }
 117
 118 static void libvlc_wait_wakeup( void *data )
 119 {
 120     vlc_sem_post( data );
 121 }
 122
 123 void libvlc_wait( libvlc_instance_t *p_i )
 124 {
 125     vlc_sem_t sem;
 126
 127     vlc_sem_init( &sem, 0 );
 128     libvlc_set_exit_handler( p_i, libvlc_wait_wakeup, &sem );
 129     vlc_sem_wait( &sem );
 130     libvlc_set_exit_handler( p_i, NULL, NULL );
 131     vlc_sem_destroy( &sem );
 132 }
 133
 134 void libvlc_set_user_agent (libvlc_instance_t *p_i,
 135                             const char *name, const char *http)
 136 {
 137     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 138     char *str;
 139
 140     var_SetString (p_libvlc, "user-agent", name);
 141     if ((http != NULL)
 142      && (asprintf (&str, "%s LibVLC/"PACKAGE_VERSION, http) != -1))
 143     {
 144         var_SetString (p_libvlc, "http-user-agent", str);
 145         free (str);
 146     }
 147 }
 148
 149 void libvlc_set_app_id(libvlc_instance_t *p_i, const char *id,
 150                        const char *version, const char *icon)
 151 {
 152     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 153
 154     var_SetString(p_libvlc, "app-id", id ? id : "");
 155     var_SetString(p_libvlc, "app-version", version ? version : "");
 156     var_SetString(p_libvlc, "app-icon-name", icon ? icon : "");
 157 }
 158
 159 const char * libvlc_get_version(void)
 160 {
 161     return VERSION_MESSAGE;
 162 }
 163
 164 const char * libvlc_get_compiler(void)
 165 {
 166     return VLC_Compiler();
 167 }
 168
 169 const char * libvlc_get_changeset(void)
 170 {
 171     extern const char psz_vlc_changeset[];
 172     return psz_vlc_changeset;
 173 }
 174
 175 void libvlc_free( void *ptr )
 176 {
 177     free( ptr );
 178 }
 179
 180 static libvlc_module_description_t *module_description_list_get(
 181                 libvlc_instance_t *p_instance, const char *capability )
 182 {
 183     libvlc_module_description_t *p_list = NULL,
 184                           *p_actual = NULL,
 185                           *p_previous = NULL;
 186     size_t count;
 187     module_t **module_list = module_list_get( &count );
 188
 189     for (size_t i = 0; i < count; i++)
 190     {
 191         module_t *p_module = module_list[i];
 192
 193         if ( !module_provides( p_module, capability ) )
 194             continue;
 195
 196         p_actual = ( libvlc_module_description_t * ) malloc( sizeof( libvlc_module_description_t ) );
 197         if ( p_actual == NULL )
 198         {
 199             libvlc_printerr( "Not enough memory" );
 200             libvlc_module_description_list_release( p_list );
 201             module_list_free( module_list );
 202             return NULL;
 203         }
 204
 205         if ( p_list == NULL )
 206             p_list = p_actual;
 207
 208         const char* name = module_get_object( p_module );
 209         const char* shortname = module_get_name( p_module, false );
 210         const char* longname = module_get_name( p_module, true );
 211         const char* help = module_get_help( p_module );
 212         p_actual->psz_name = name ? strdup( name ) : NULL;
 213         p_actual->psz_shortname = shortname ? strdup( shortname ) : NULL;
 214         p_actual->psz_longname = longname ? strdup( longname ) : NULL;
 215         p_actual->psz_help = help ? strdup( help ) : NULL;
 216
 217         p_actual->p_next = NULL;
 218         if ( p_previous )
 219             p_previous->p_next = p_actual;
 220         p_previous = p_actual;
 221     }
 222
 223     module_list_free( module_list );
 224     VLC_UNUSED( p_instance );
 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 filter" );
 253 }
 254
 255 int64_t libvlc_clock(void)
 256 {
 257     return mdate();
 258 }
 259
 260 const char vlc_module_name[] = "libvlc";