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 #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->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     return p_new;
  73
  74 error:
  75     free (p_new);
  76     libvlc_threads_deinit ();
  77     return NULL;
  78 }
  79
  80 void libvlc_retain( libvlc_instance_t *p_instance )
  81 {
  82     assert( p_instance != NULL );
  83     assert( p_instance->ref_count < UINT_MAX );
  84
  85     vlc_mutex_lock( &p_instance->instance_lock );
  86     p_instance->ref_count++;
  87     vlc_mutex_unlock( &p_instance->instance_lock );
  88 }
  89
  90 void libvlc_release( libvlc_instance_t *p_instance )
  91 {
  92     vlc_mutex_t *lock = &p_instance->instance_lock;
  93     int refs;
  94
  95     vlc_mutex_lock( lock );
  96     assert( p_instance->ref_count > 0 );
  97     refs = --p_instance->ref_count;
  98     vlc_mutex_unlock( lock );
  99
 100     if( refs == 0 )
 101     {
 102         vlc_mutex_destroy( lock );
 103         if( p_instance->libvlc_vlm.pf_release )
 104             p_instance->libvlc_vlm.pf_release( p_instance );
 105         libvlc_InternalCleanup( p_instance->p_libvlc_int );
 106         libvlc_InternalDestroy( p_instance->p_libvlc_int );
 107         free( p_instance );
 108         libvlc_threads_deinit ();
 109     }
 110 }
 111
 112 void libvlc_set_exit_handler( libvlc_instance_t *p_i, void (*cb) (void *),
 113                               void *data )
 114 {
 115     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 116     libvlc_SetExitHandler( p_libvlc, cb, data );
 117 }
 118
 119 static void libvlc_wait_wakeup( void *data )
 120 {
 121     vlc_sem_post( data );
 122 }
 123
 124 void libvlc_wait( libvlc_instance_t *p_i )
 125 {
 126     vlc_sem_t sem;
 127
 128     vlc_sem_init( &sem, 0 );
 129     libvlc_set_exit_handler( p_i, libvlc_wait_wakeup, &sem );
 130     vlc_sem_wait( &sem );
 131     libvlc_set_exit_handler( p_i, NULL, NULL );
 132     vlc_sem_destroy( &sem );
 133 }
 134
 135 void libvlc_set_user_agent (libvlc_instance_t *p_i,
 136                             const char *name, const char *http)
 137 {
 138     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 139     char *str;
 140
 141     var_SetString (p_libvlc, "user-agent", name);
 142     if ((http != NULL)
 143      && (asprintf (&str, "%s LibVLC/"PACKAGE_VERSION, http) != -1))
 144     {
 145         var_SetString (p_libvlc, "http-user-agent", str);
 146         free (str);
 147     }
 148 }
 149
 150 void libvlc_set_app_id(libvlc_instance_t *p_i, const char *id,
 151                        const char *version, const char *icon)
 152 {
 153     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 154
 155     var_SetString(p_libvlc, "app-id", id ? id : "");
 156     var_SetString(p_libvlc, "app-version", version ? version : "");
 157     var_SetString(p_libvlc, "app-version", icon ? icon : "");
 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     libvlc_module_description_t *p_list = NULL,
 185                           *p_actual = NULL,
 186                           *p_previous = NULL;
 187     size_t count;
 188     module_t **module_list = module_list_get( &count );
 189
 190     for (size_t i = 0; i < count; 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     VLC_UNUSED( p_instance );
 226     return p_list;
 227 }
 228
 229 void libvlc_module_description_list_release( libvlc_module_description_t *p_list )
 230 {
 231     libvlc_module_description_t *p_actual, *p_before;
 232     p_actual = p_list;
 233
 234     while ( p_actual )
 235     {
 236         free( p_actual->psz_name );
 237         free( p_actual->psz_shortname );
 238         free( p_actual->psz_longname );
 239         free( p_actual->psz_help );
 240         p_before = p_actual;
 241         p_actual = p_before->p_next;
 242         free( p_before );
 243     }
 244 }
 245
 246 libvlc_module_description_t *libvlc_audio_filter_list_get( libvlc_instance_t *p_instance )
 247 {
 248     return module_description_list_get( p_instance, "audio filter" );
 249 }
 250
 251 libvlc_module_description_t *libvlc_video_filter_list_get( libvlc_instance_t *p_instance )
 252 {
 253     return module_description_list_get( p_instance, "video filter2" );
 254 }
 255
 256 int64_t libvlc_clock(void)
 257 {
 258     return mdate();
 259 }