lib/core.c

   1 /*****************************************************************************
   2  * core.c: Core libvlc new API functions : initialization
   3  *****************************************************************************
   4  * Copyright (C) 2005 VLC authors and VideoLAN
   5  *
   6  * Authors: Clément Stenac <zorglub@videolan.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU Lesser General Public License as published by
  10  * the Free Software Foundation; either version 2.1 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 #ifdef HAVE_CONFIG_H
  24 # include "config.h"
  25 #endif
  26
  27 #include "libvlc_internal.h"
  28 #include <vlc_modules.h>
  29 #include <vlc/vlc.h>
  30
  31 #include <vlc_interface.h>
  32
  33 #include <stdarg.h>
  34 #include <limits.h>
  35 #include <assert.h>
  36
  37
  38 libvlc_instance_t * libvlc_new( int argc, const char *const *argv )
  39 {
  40     libvlc_threads_init ();
  41
  42     libvlc_instance_t *p_new = malloc (sizeof (*p_new));
  43     if (unlikely(p_new == NULL))
  44         return NULL;
  45
  46     const char *my_argv[argc + 2];
  47     my_argv[0] = "libvlc"; /* dummy arg0, skipped by getopt() et al */
  48     for( int i = 0; i < argc; i++ )
  49          my_argv[i + 1] = argv[i];
  50     my_argv[argc + 1] = NULL; /* C calling conventions require a NULL */
  51
  52     libvlc_int_t *p_libvlc_int = libvlc_InternalCreate();
  53     if (unlikely (p_libvlc_int == NULL))
  54         goto error;
  55
  56     if (libvlc_InternalInit( p_libvlc_int, argc + 1, my_argv ))
  57     {
  58         libvlc_InternalDestroy( p_libvlc_int );
  59         goto error;
  60     }
  61
  62     p_new->p_libvlc_int = p_libvlc_int;
  63     vlc_atomic_rc_init( &p_new->ref_count );
  64     p_new->p_callback_list = NULL;
  65     return p_new;
  66
  67 error:
  68     free (p_new);
  69     libvlc_threads_deinit ();
  70     return NULL;
  71 }
  72
  73 void libvlc_retain( libvlc_instance_t *p_instance )
  74 {
  75     assert( p_instance != NULL );
  76
  77     vlc_atomic_rc_inc( &p_instance->ref_count );
  78 }
  79
  80 void libvlc_release( libvlc_instance_t *p_instance )
  81 {
  82     if(vlc_atomic_rc_dec( &p_instance->ref_count ))
  83     {
  84         libvlc_Quit( p_instance->p_libvlc_int );
  85         libvlc_InternalCleanup( p_instance->p_libvlc_int );
  86         libvlc_InternalDestroy( p_instance->p_libvlc_int );
  87         free( p_instance );
  88         libvlc_threads_deinit ();
  89     }
  90 }
  91
  92 void libvlc_set_exit_handler( libvlc_instance_t *p_i, void (*cb) (void *),
  93                               void *data )
  94 {
  95     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
  96     libvlc_SetExitHandler( p_libvlc, cb, data );
  97 }
  98
  99 void libvlc_set_user_agent (libvlc_instance_t *p_i,
 100                             const char *name, const char *http)
 101 {
 102     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 103     char *str;
 104
 105     var_SetString (p_libvlc, "user-agent", name);
 106     if ((http != NULL)
 107      && (asprintf (&str, "%s LibVLC/"PACKAGE_VERSION, http) != -1))
 108     {
 109         var_SetString (p_libvlc, "http-user-agent", str);
 110         free (str);
 111     }
 112 }
 113
 114 void libvlc_set_app_id(libvlc_instance_t *p_i, const char *id,
 115                        const char *version, const char *icon)
 116 {
 117     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 118
 119     var_SetString(p_libvlc, "app-id", id ? id : "");
 120     var_SetString(p_libvlc, "app-version", version ? version : "");
 121     var_SetString(p_libvlc, "app-icon-name", icon ? icon : "");
 122 }
 123
 124 const char * libvlc_get_version(void)
 125 {
 126     return VERSION_MESSAGE;
 127 }
 128
 129 const char * libvlc_get_compiler(void)
 130 {
 131     return VLC_Compiler();
 132 }
 133
 134 const char * libvlc_get_changeset(void)
 135 {
 136     extern const char psz_vlc_changeset[];
 137     return psz_vlc_changeset;
 138 }
 139
 140 void libvlc_free( void *ptr )
 141 {
 142     free( ptr );
 143 }
 144
 145 static libvlc_module_description_t *module_description_list_get(
 146                 libvlc_instance_t *p_instance, const char *capability )
 147 {
 148     libvlc_module_description_t *p_list = NULL,
 149                           *p_actual = NULL,
 150                           *p_previous = NULL;
 151     size_t count;
 152     module_t **module_list = module_list_get( &count );
 153
 154     for (size_t i = 0; i < count; i++)
 155     {
 156         module_t *p_module = module_list[i];
 157
 158         if ( !module_provides( p_module, capability ) )
 159             continue;
 160
 161         p_actual = ( libvlc_module_description_t * ) malloc( sizeof( libvlc_module_description_t ) );
 162         if ( p_actual == NULL )
 163         {
 164             libvlc_printerr( "Not enough memory" );
 165             libvlc_module_description_list_release( p_list );
 166             module_list_free( module_list );
 167             return NULL;
 168         }
 169
 170         if ( p_list == NULL )
 171             p_list = p_actual;
 172
 173         const char* name = module_get_object( p_module );
 174         const char* shortname = module_get_name( p_module, false );
 175         const char* longname = module_get_name( p_module, true );
 176         const char* help = module_get_help( p_module );
 177         p_actual->psz_name = name ? strdup( name ) : NULL;
 178         p_actual->psz_shortname = shortname ? strdup( shortname ) : NULL;
 179         p_actual->psz_longname = longname ? strdup( longname ) : NULL;
 180         p_actual->psz_help = help ? strdup( help ) : NULL;
 181
 182         p_actual->p_next = NULL;
 183         if ( p_previous )
 184             p_previous->p_next = p_actual;
 185         p_previous = p_actual;
 186     }
 187
 188     module_list_free( module_list );
 189     VLC_UNUSED( p_instance );
 190     return p_list;
 191 }
 192
 193 void libvlc_module_description_list_release( libvlc_module_description_t *p_list )
 194 {
 195     libvlc_module_description_t *p_actual, *p_before;
 196     p_actual = p_list;
 197
 198     while ( p_actual )
 199     {
 200         free( p_actual->psz_name );
 201         free( p_actual->psz_shortname );
 202         free( p_actual->psz_longname );
 203         free( p_actual->psz_help );
 204         p_before = p_actual;
 205         p_actual = p_before->p_next;
 206         free( p_before );
 207     }
 208 }
 209
 210 libvlc_module_description_t *libvlc_audio_filter_list_get( libvlc_instance_t *p_instance )
 211 {
 212     return module_description_list_get( p_instance, "audio filter" );
 213 }
 214
 215 libvlc_module_description_t *libvlc_video_filter_list_get( libvlc_instance_t *p_instance )
 216 {
 217     return module_description_list_get( p_instance, "video filter" );
 218 }
 219
 220 int64_t libvlc_clock(void)
 221 {
 222     return US_FROM_VLC_TICK(vlc_tick_now());
 223 }
 224
 225 const char vlc_module_name[] = "libvlc";