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 static const char nomemstr[] = "Insufficient memory";
  42
  43 libvlc_instance_t * libvlc_new( int argc, const char *const *argv )
  44 {
  45     libvlc_threads_init ();
  46
  47     libvlc_instance_t *p_new = malloc (sizeof (*p_new));
  48     if (unlikely(p_new == NULL))
  49         return NULL;
  50
  51     const char *my_argv[argc + 2];
  52     my_argv[0] = "libvlc"; /* dummy arg0, skipped by getopt() et al */
  53     for( int i = 0; i < argc; i++ )
  54          my_argv[i + 1] = argv[i];
  55     my_argv[argc + 1] = NULL; /* C calling conventions require a NULL */
  56
  57     libvlc_int_t *p_libvlc_int = libvlc_InternalCreate();
  58     if (unlikely (p_libvlc_int == NULL))
  59         goto error;
  60
  61     if (libvlc_InternalInit( p_libvlc_int, argc + 1, my_argv ))
  62     {
  63         libvlc_InternalDestroy( p_libvlc_int );
  64         goto error;
  65     }
  66
  67     p_new->p_libvlc_int = p_libvlc_int;
  68     p_new->libvlc_vlm.p_vlm = NULL;
  69     p_new->libvlc_vlm.p_event_manager = NULL;
  70     p_new->libvlc_vlm.pf_release = NULL;
  71     p_new->ref_count = 1;
  72     p_new->p_callback_list = NULL;
  73     vlc_mutex_init(&p_new->instance_lock);
  74     return p_new;
  75
  76 error:
  77     free (p_new);
  78     libvlc_threads_deinit ();
  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_threads_deinit ();
 111     }
 112 }
 113
 114 void libvlc_set_exit_handler( libvlc_instance_t *p_i, void (*cb) (void *),
 115                               void *data )
 116 {
 117     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 118     libvlc_SetExitHandler( p_libvlc, cb, data );
 119 }
 120
 121 static void libvlc_wait_wakeup( void *data )
 122 {
 123     vlc_sem_post( data );
 124 }
 125
 126 void libvlc_wait( libvlc_instance_t *p_i )
 127 {
 128     vlc_sem_t sem;
 129
 130     vlc_sem_init( &sem, 0 );
 131     libvlc_set_exit_handler( p_i, libvlc_wait_wakeup, &sem );
 132     vlc_sem_wait( &sem );
 133     libvlc_set_exit_handler( p_i, NULL, NULL );
 134     vlc_sem_destroy( &sem );
 135 }
 136
 137 void libvlc_set_user_agent (libvlc_instance_t *p_i,
 138                             const char *name, const char *http)
 139 {
 140     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 141     char *str;
 142
 143     var_SetString (p_libvlc, "user-agent", name);
 144     if ((http != NULL)
 145      && (asprintf (&str, "%s LibVLC/"PACKAGE_VERSION, http) != -1))
 146     {
 147         var_SetString (p_libvlc, "http-user-agent", str);
 148         free (str);
 149     }
 150 }
 151
 152 void libvlc_set_app_id(libvlc_instance_t *p_i, const char *id,
 153                        const char *version, const char *icon)
 154 {
 155     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 156
 157     var_SetString(p_libvlc, "app-id", id ? id : "");
 158     var_SetString(p_libvlc, "app-version", version ? version : "");
 159     var_SetString(p_libvlc, "app-version", icon ? icon : "");
 160 }
 161
 162 const char * libvlc_get_version(void)
 163 {
 164     return VERSION_MESSAGE;
 165 }
 166
 167 const char * libvlc_get_compiler(void)
 168 {
 169     return VLC_Compiler();
 170 }
 171
 172 const char * libvlc_get_changeset(void)
 173 {
 174     extern const char psz_vlc_changeset[];
 175     return psz_vlc_changeset;
 176 }
 177
 178 void libvlc_free( void *ptr )
 179 {
 180     free( ptr );
 181 }
 182
 183 static libvlc_module_description_t *module_description_list_get(
 184                 libvlc_instance_t *p_instance, const char *capability )
 185 {
 186     libvlc_module_description_t *p_list = NULL,
 187                           *p_actual = NULL,
 188                           *p_previous = NULL;
 189     size_t count;
 190     module_t **module_list = module_list_get( &count );
 191
 192     for (size_t i = 0; i < count; i++)
 193     {
 194         module_t *p_module = module_list[i];
 195
 196         if ( !module_provides( p_module, capability ) )
 197             continue;
 198
 199         p_actual = ( libvlc_module_description_t * ) malloc( sizeof( libvlc_module_description_t ) );
 200         if ( p_actual == NULL )
 201         {
 202             libvlc_printerr( "Not enough memory" );
 203             libvlc_module_description_list_release( p_list );
 204             module_list_free( module_list );
 205             return NULL;
 206         }
 207
 208         if ( p_list == NULL )
 209             p_list = p_actual;
 210
 211         const char* name = module_get_object( p_module );
 212         const char* shortname = module_get_name( p_module, false );
 213         const char* longname = module_get_name( p_module, true );
 214         const char* help = module_get_help( p_module );
 215         p_actual->psz_name = name ? strdup( name ) : NULL;
 216         p_actual->psz_shortname = shortname ? strdup( shortname ) : NULL;
 217         p_actual->psz_longname = longname ? strdup( longname ) : NULL;
 218         p_actual->psz_help = help ? strdup( help ) : NULL;
 219
 220         p_actual->p_next = NULL;
 221         if ( p_previous )
 222             p_previous->p_next = p_actual;
 223         p_previous = p_actual;
 224     }
 225
 226     module_list_free( module_list );
 227     VLC_UNUSED( p_instance );
 228     return p_list;
 229 }
 230
 231 void libvlc_module_description_list_release( libvlc_module_description_t *p_list )
 232 {
 233     libvlc_module_description_t *p_actual, *p_before;
 234     p_actual = p_list;
 235
 236     while ( p_actual )
 237     {
 238         free( p_actual->psz_name );
 239         free( p_actual->psz_shortname );
 240         free( p_actual->psz_longname );
 241         free( p_actual->psz_help );
 242         p_before = p_actual;
 243         p_actual = p_before->p_next;
 244         free( p_before );
 245     }
 246 }
 247
 248 libvlc_module_description_t *libvlc_audio_filter_list_get( libvlc_instance_t *p_instance )
 249 {
 250     return module_description_list_get( p_instance, "audio filter" );
 251 }
 252
 253 libvlc_module_description_t *libvlc_video_filter_list_get( libvlc_instance_t *p_instance )
 254 {
 255     return module_description_list_get( p_instance, "video filter2" );
 256 }
 257
 258 int64_t libvlc_clock(void)
 259 {
 260     return mdate();
 261 }