core.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:7k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * core.c: Core libvlc new API functions : initialization, exceptions handling
- *****************************************************************************
- * Copyright (C) 2005 the VideoLAN team
- * $Id: e52a1a0023b93ca4d08052571436b9fa3d6694dc $
- *
- * Authors: Clément Stenac <zorglub@videolan.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- #include "libvlc_internal.h"
- #include <vlc/libvlc.h>
- #include <vlc_interface.h>
- #include <vlc_vlm.h>
- #include <stdarg.h>
- #include <limits.h>
- #include <assert.h>
- static const char nomemstr[] = "Insufficient memory";
- /*************************************************************************
- * Exceptions handling
- *************************************************************************/
- void libvlc_exception_init( libvlc_exception_t *p_exception )
- {
- p_exception->b_raised = 0;
- p_exception->psz_message = NULL;
- }
- void libvlc_exception_clear( libvlc_exception_t *p_exception )
- {
- if( NULL == p_exception )
- return;
- if( p_exception->psz_message != nomemstr )
- free( p_exception->psz_message );
- p_exception->psz_message = NULL;
- p_exception->b_raised = 0;
- }
- int libvlc_exception_raised( const libvlc_exception_t *p_exception )
- {
- return (NULL != p_exception) && p_exception->b_raised;
- }
- const char *
- libvlc_exception_get_message( const libvlc_exception_t *p_exception )
- {
- if( p_exception->b_raised == 1 && p_exception->psz_message )
- {
- return p_exception->psz_message;
- }
- return NULL;
- }
- static void libvlc_exception_not_handled( const char *psz )
- {
- fprintf( stderr, "*** LibVLC Exception not handled: %snSet a breakpoint in '%s' to debug.n",
- psz, __func__ );
- }
- void libvlc_exception_raise( libvlc_exception_t *p_exception,
- const char *psz_format, ... )
- {
- va_list args;
- char * psz;
- /* Unformat-ize the message */
- va_start( args, psz_format );
- if( vasprintf( &psz, psz_format, args ) == -1)
- psz = (char *)nomemstr;
- va_end( args );
- /* Does caller care about exceptions ? */
- if( p_exception == NULL ) {
- /* Print something, so that lazy third-parties can easily
- * notice that something may have gone unnoticedly wrong */
- libvlc_exception_not_handled( psz );
- if( psz != nomemstr )
- free( psz );
- return;
- }
- /* Make sure that there is no unnoticed previous exception */
- if( p_exception->b_raised )
- {
- libvlc_exception_not_handled( p_exception->psz_message );
- libvlc_exception_clear( p_exception );
- }
- p_exception->psz_message = psz;
- p_exception->b_raised = 1;
- }
- libvlc_instance_t * libvlc_new( int argc, const char *const *argv,
- libvlc_exception_t *p_e )
- {
- libvlc_instance_t *p_new;
- int i_ret;
- libvlc_int_t *p_libvlc_int = libvlc_InternalCreate();
- if( !p_libvlc_int ) RAISENULL( "VLC initialization failed" );
- p_new = malloc( sizeof( libvlc_instance_t ) );
- if( !p_new ) RAISENULL( "Out of memory" );
- const char *my_argv[argc + 2];
- my_argv[0] = "libvlc"; /* dummy arg0, skipped by getopt() et al */
- for( int i = 0; i < argc; i++ )
- my_argv[i + 1] = argv[i];
- my_argv[argc + 1] = NULL; /* C calling conventions require a NULL */
- /** todo Look for interface settings. If we don't have any, add -I dummy */
- /* Because we probably don't want a GUI by default */
- i_ret = libvlc_InternalInit( p_libvlc_int, argc + 1, my_argv );
- if( i_ret )
- {
- libvlc_InternalDestroy( p_libvlc_int );
- free( p_new );
- if( i_ret == VLC_EEXITSUCCESS )
- return NULL;
- else
- RAISENULL( "VLC initialization failed" );
- }
- p_new->p_libvlc_int = p_libvlc_int;
- p_new->p_vlm = NULL;
- p_new->b_playlist_locked = 0;
- p_new->ref_count = 1;
- p_new->verbosity = 1;
- p_new->p_callback_list = NULL;
- vlc_mutex_init(&p_new->instance_lock);
- vlc_mutex_init(&p_new->event_callback_lock);
- return p_new;
- }
- void libvlc_retain( libvlc_instance_t *p_instance )
- {
- assert( p_instance != NULL );
- assert( p_instance->ref_count < UINT_MAX );
- vlc_mutex_lock( &p_instance->instance_lock );
- p_instance->ref_count++;
- vlc_mutex_unlock( &p_instance->instance_lock );
- }
- void libvlc_release( libvlc_instance_t *p_instance )
- {
- vlc_mutex_t *lock = &p_instance->instance_lock;
- int refs;
- assert( p_instance->ref_count > 0 );
- vlc_mutex_lock( lock );
- refs = --p_instance->ref_count;
- vlc_mutex_unlock( lock );
- if( refs == 0 )
- {
- vlc_mutex_destroy( lock );
- vlc_mutex_destroy( &p_instance->event_callback_lock );
- if( p_instance->p_vlm )
- vlm_Delete( p_instance->p_vlm );
- libvlc_InternalCleanup( p_instance->p_libvlc_int );
- libvlc_InternalDestroy( p_instance->p_libvlc_int );
- free( p_instance );
- }
- }
- void libvlc_add_intf( libvlc_instance_t *p_i, const char *name,
- libvlc_exception_t *p_e )
- {
- if( libvlc_InternalAddIntf( p_i->p_libvlc_int, name ) )
- RAISEVOID( "Interface initialization failed" );
- }
- void libvlc_wait( libvlc_instance_t *p_i )
- {
- libvlc_int_t *p_libvlc = p_i->p_libvlc_int;
- libvlc_InternalWait( p_libvlc );
- }
- int libvlc_get_vlc_id( libvlc_instance_t *p_instance )
- {
- assert( p_instance );
- return 1;
- }
- const char * libvlc_get_version(void)
- {
- return VLC_Version();
- }
- const char * libvlc_get_compiler(void)
- {
- return VLC_Compiler();
- }
- const char * libvlc_get_changeset(void)
- {
- return "exported";
- }
- /* export internal libvlc_instance for ugly hacks with libvlccore */
- vlc_object_t *libvlc_get_vlc_instance( libvlc_instance_t* p_instance )
- {
- vlc_object_hold( p_instance->p_libvlc_int ) ;
- return (vlc_object_t*) p_instance->p_libvlc_int ;
- }
- void libvlc_free( void *ptr )
- {
- free( ptr );
- }