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 #include "../src/revision.c"
  38
  39 libvlc_instance_t * libvlc_new( int argc, const char *const *argv )
  40 {
  41     libvlc_threads_init ();
  42
  43     libvlc_instance_t *p_new = malloc (sizeof (*p_new));
  44     if (unlikely(p_new == NULL))
  45         return NULL;
  46
  47     const char *my_argv[argc + 2];
  48     my_argv[0] = "libvlc"; /* dummy arg0, skipped by getopt() et al */
  49     for( int i = 0; i < argc; i++ )
  50          my_argv[i + 1] = argv[i];
  51     my_argv[argc + 1] = NULL; /* C calling conventions require a NULL */
  52
  53     libvlc_int_t *p_libvlc_int = libvlc_InternalCreate();
  54     if (unlikely (p_libvlc_int == NULL))
  55         goto error;
  56
  57     if (libvlc_InternalInit( p_libvlc_int, argc + 1, my_argv ))
  58     {
  59         libvlc_InternalDestroy( p_libvlc_int );
  60         goto error;
  61     }
  62
  63     p_new->p_libvlc_int = p_libvlc_int;
  64     p_new->ref_count = 1;
  65     p_new->p_callback_list = NULL;
  66     vlc_mutex_init(&p_new->instance_lock);
  67     return p_new;
  68
  69 error:
  70     free (p_new);
  71     libvlc_threads_deinit ();
  72     return NULL;
  73 }
  74
  75 void libvlc_retain( libvlc_instance_t *p_instance )
  76 {
  77     assert( p_instance != NULL );
  78     assert( p_instance->ref_count < UINT_MAX );
  79
  80     vlc_mutex_lock( &p_instance->instance_lock );
  81     p_instance->ref_count++;
  82     vlc_mutex_unlock( &p_instance->instance_lock );
  83 }
  84
  85 void libvlc_release( libvlc_instance_t *p_instance )
  86 {
  87     vlc_mutex_t *lock = &p_instance->instance_lock;
  88     int refs;
  89
  90     vlc_mutex_lock( lock );
  91     assert( p_instance->ref_count > 0 );
  92     refs = --p_instance->ref_count;
  93     vlc_mutex_unlock( lock );
  94
  95     if( refs == 0 )
  96     {
  97         vlc_mutex_destroy( lock );
  98         libvlc_Quit( p_instance->p_libvlc_int );
  99         libvlc_InternalCleanup( p_instance->p_libvlc_int );
 100         libvlc_InternalDestroy( p_instance->p_libvlc_int );
 101         free( p_instance );
 102         libvlc_threads_deinit ();
 103     }
 104 }
 105
 106 void libvlc_set_exit_handler( libvlc_instance_t *p_i, void (*cb) (void *),
 107                               void *data )
 108 {
 109     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 110     libvlc_SetExitHandler( p_libvlc, cb, data );
 111 }
 112
 113 void libvlc_set_user_agent (libvlc_instance_t *p_i,
 114                             const char *name, const char *http)
 115 {
 116     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 117     char *str;
 118
 119     var_SetString (p_libvlc, "user-agent", name);
 120     if ((http != NULL)
 121      && (asprintf (&str, "%s LibVLC/"PACKAGE_VERSION, http) != -1))
 122     {
 123         var_SetString (p_libvlc, "http-user-agent", str);
 124         free (str);
 125     }
 126 }
 127
 128 void libvlc_set_app_id(libvlc_instance_t *p_i, const char *id,
 129                        const char *version, const char *icon)
 130 {
 131     libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
 132
 133     var_SetString(p_libvlc, "app-id", id ? id : "");
 134     var_SetString(p_libvlc, "app-version", version ? version : "");
 135     var_SetString(p_libvlc, "app-icon-name", icon ? icon : "");
 136 }
 137
 138 const char * libvlc_get_version(void)
 139 {
 140     return VERSION_MESSAGE;
 141 }
 142
 143 const char * libvlc_get_compiler(void)
 144 {
 145     return VLC_Compiler();
 146 }
 147
 148 const char * libvlc_get_changeset(void)
 149 {
 150     extern const char psz_vlc_changeset[];
 151     return psz_vlc_changeset;
 152 }
 153
 154 void libvlc_free( void *ptr )
 155 {
 156     free( ptr );
 157 }
 158
 159 static libvlc_module_description_t *module_description_list_get(
 160                 libvlc_instance_t *p_instance, const char *capability )
 161 {
 162     libvlc_module_description_t *p_list = NULL,
 163                           *p_actual = NULL,
 164                           *p_previous = NULL;
 165     size_t count;
 166     module_t **module_list = module_list_get( &count );
 167
 168     for (size_t i = 0; i < count; i++)
 169     {
 170         module_t *p_module = module_list[i];
 171
 172         if ( !module_provides( p_module, capability ) )
 173             continue;
 174
 175         p_actual = ( libvlc_module_description_t * ) malloc( sizeof( libvlc_module_description_t ) );
 176         if ( p_actual == NULL )
 177         {
 178             libvlc_printerr( "Not enough memory" );
 179             libvlc_module_description_list_release( p_list );
 180             module_list_free( module_list );
 181             return NULL;
 182         }
 183
 184         if ( p_list == NULL )
 185             p_list = p_actual;
 186
 187         const char* name = module_get_object( p_module );
 188         const char* shortname = module_get_name( p_module, false );
 189         const char* longname = module_get_name( p_module, true );
 190         const char* help = module_get_help( p_module );
 191         p_actual->psz_name = name ? strdup( name ) : NULL;
 192         p_actual->psz_shortname = shortname ? strdup( shortname ) : NULL;
 193         p_actual->psz_longname = longname ? strdup( longname ) : NULL;
 194         p_actual->psz_help = help ? strdup( help ) : NULL;
 195
 196         p_actual->p_next = NULL;
 197         if ( p_previous )
 198             p_previous->p_next = p_actual;
 199         p_previous = p_actual;
 200     }
 201
 202     module_list_free( module_list );
 203     VLC_UNUSED( p_instance );
 204     return p_list;
 205 }
 206
 207 void libvlc_module_description_list_release( libvlc_module_description_t *p_list )
 208 {
 209     libvlc_module_description_t *p_actual, *p_before;
 210     p_actual = p_list;
 211
 212     while ( p_actual )
 213     {
 214         free( p_actual->psz_name );
 215         free( p_actual->psz_shortname );
 216         free( p_actual->psz_longname );
 217         free( p_actual->psz_help );
 218         p_before = p_actual;
 219         p_actual = p_before->p_next;
 220         free( p_before );
 221     }
 222 }
 223
 224 libvlc_module_description_t *libvlc_audio_filter_list_get( libvlc_instance_t *p_instance )
 225 {
 226     return module_description_list_get( p_instance, "audio filter" );
 227 }
 228
 229 libvlc_module_description_t *libvlc_video_filter_list_get( libvlc_instance_t *p_instance )
 230 {
 231     return module_description_list_get( p_instance, "video filter" );
 232 }
 233
 234 int64_t libvlc_clock(void)
 235 {
 236     return US_FROM_VLC_TICK(vlc_tick_now());
 237 }
 238
 239 const char vlc_module_name[] = "libvlc";