interface.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:8k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * interface.c: interface access for other threads
- * This library provides basic functions for threads to interact with user
- * interface, such as command line.
- *****************************************************************************
- * Copyright (C) 1998-2007 the VideoLAN team
- * $Id: 9b99c1b62538963816b90f72f0457b2661c05458 $
- *
- * Authors: Vincent Seguin <seguin@via.ecp.fr>
- *
- * 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.
- *****************************************************************************/
- /**
- * file
- * This file contains functions related to interface management
- */
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <vlc_common.h>
- #include <vlc_aout.h>
- #include <vlc_vout.h>
- #include "vlc_interface.h"
- #if defined( __APPLE__ ) || defined( WIN32 )
- #include "../control/libvlc_internal.h"
- #endif
- #include "libvlc.h"
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static void* RunInterface( vlc_object_t *p_this );
- #if defined( __APPLE__ ) || defined( WIN32 )
- static void * MonitorLibVLCDeath( vlc_object_t *p_this );
- #endif
- static int AddIntfCallback( vlc_object_t *, char const *,
- vlc_value_t , vlc_value_t , void * );
- /**
- * Destroy the interface after the main loop endeed.
- *
- * @param p_obj: the interface thread
- */
- static void intf_Destroy( vlc_object_t *obj )
- {
- intf_thread_t *p_intf = (intf_thread_t *)obj;
- free( p_intf->psz_intf );
- config_ChainDestroy( p_intf->p_cfg );
- }
- /**
- * Create the interface, and prepare it for main loop. It opens ouput device
- * and creates specific interfaces. Sends its own error messages.
- *
- * @param p_this the calling vlc_object_t
- * @param psz_module a preferred interface module
- * @return a pointer to the created interface thread, NULL on error
- */
- intf_thread_t* __intf_Create( vlc_object_t *p_this, const char *psz_module )
- {
- intf_thread_t * p_intf;
- /* Allocate structure */
- p_intf = vlc_object_create( p_this, VLC_OBJECT_INTF );
- if( !p_intf )
- return NULL;
- #if defined( __APPLE__ ) || defined( WIN32 )
- p_intf->b_should_run_on_first_thread = false;
- #endif
- /* Choose the best module */
- p_intf->p_cfg = NULL;
- char *psz_parser = *psz_module == '$'
- ? var_CreateGetString(p_intf,psz_module+1)
- : strdup( psz_module );
- char *psz_tmp = config_ChainCreate( &p_intf->psz_intf, &p_intf->p_cfg,
- psz_parser );
- free( psz_tmp );
- free( psz_parser );
- p_intf->p_module = module_need( p_intf, "interface", p_intf->psz_intf, true );
- if( p_intf->p_module == NULL )
- {
- msg_Err( p_intf, "no suitable interface module" );
- free( p_intf->psz_intf );
- vlc_object_release( p_intf );
- return NULL;
- }
- /* Attach interface to its parent object */
- vlc_object_attach( p_intf, p_this );
- vlc_object_set_destructor( p_intf, intf_Destroy );
- return p_intf;
- }
- /**
- * Starts and runs the interface thread.
- *
- * @param p_intf the interface thread
- * @return VLC_SUCCESS on success, an error number else
- */
- int intf_RunThread( intf_thread_t *p_intf )
- {
- #if defined( __APPLE__ ) || defined( WIN32 )
- /* Hack to get Mac OS X Cocoa runtime running
- * (it needs access to the main thread) */
- if( p_intf->b_should_run_on_first_thread )
- {
- if( vlc_thread_create( p_intf, "interface", MonitorLibVLCDeath,
- VLC_THREAD_PRIORITY_LOW ) )
- {
- msg_Err( p_intf, "cannot spawn libvlc death monitoring thread" );
- return VLC_EGENERIC;
- }
- RunInterface( VLC_OBJECT(p_intf) );
- /* It is monitoring libvlc, not the p_intf */
- vlc_object_kill( p_intf->p_libvlc );
- return VLC_SUCCESS;
- }
- #endif
- /* Run the interface in a separate thread */
- if( vlc_thread_create( p_intf, "interface", RunInterface,
- VLC_THREAD_PRIORITY_LOW ) )
- {
- msg_Err( p_intf, "cannot spawn interface thread" );
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
- }
- /**
- * Stops the interface thread
- *
- * This function asks the interface thread to stop
- * @param p_intf the interface thread
- */
- void intf_StopThread( intf_thread_t *p_intf )
- {
- /* Tell the interface to die */
- vlc_object_kill( p_intf );
- vlc_thread_join( p_intf );
- module_unneed( p_intf, p_intf->p_module );
- }
- /* Following functions are local */
- /**
- * RunInterface: setups necessary data and give control to the interface
- *
- * @param p_this: interface object
- */
- static void* RunInterface( vlc_object_t *p_this )
- {
- intf_thread_t *p_intf = (intf_thread_t *)p_this;
- vlc_value_t val, text;
- int canc = vlc_savecancel ();
- /* Variable used for interface spawning */
- var_Create( p_intf, "intf-add", VLC_VAR_STRING |
- VLC_VAR_HASCHOICE | VLC_VAR_ISCOMMAND );
- text.psz_string = _("Add Interface");
- var_Change( p_intf, "intf-add", VLC_VAR_SETTEXT, &text, NULL );
- val.psz_string = (char *)"rc";
- text.psz_string = (char *)_("Console");
- var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
- val.psz_string = (char *)"telnet";
- text.psz_string = (char *)_("Telnet Interface");
- var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
- val.psz_string = (char *)"http";
- text.psz_string = (char *)_("Web Interface");
- var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
- val.psz_string = (char *)"logger";
- text.psz_string = (char *)_("Debug logging");
- var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
- val.psz_string = (char *)"gestures";
- text.psz_string = (char *)_("Mouse Gestures");
- var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
- var_AddCallback( p_intf, "intf-add", AddIntfCallback, NULL );
- vlc_restorecancel (canc);
- /* Give control to the interface */
- if( p_intf->pf_run )
- p_intf->pf_run( p_intf );
- return NULL;
- }
- #if defined( __APPLE__ ) || defined( WIN32 )
- #include "control/libvlc_internal.h" /* libvlc_InternalWait */
- /**
- * MonitorLibVLCDeath: Used when b_should_run_on_first_thread is set.
- *
- * @param p_this: the interface object
- */
- static void * MonitorLibVLCDeath( vlc_object_t * p_this )
- {
- intf_thread_t *p_intf = (intf_thread_t *)p_this;
- libvlc_int_t * p_libvlc = p_intf->p_libvlc;
- int canc = vlc_savecancel ();
- libvlc_InternalWait( p_libvlc );
- vlc_object_kill( p_intf ); /* Kill the stupid first thread interface */
- vlc_restorecancel (canc);
- return NULL;
- }
- #endif
- static int AddIntfCallback( vlc_object_t *p_this, char const *psz_cmd,
- vlc_value_t oldval, vlc_value_t newval, void *p_data )
- {
- (void)psz_cmd; (void)oldval; (void)p_data;
- intf_thread_t *p_intf;
- char* psz_intf;
- /* Try to create the interface */
- if( asprintf( &psz_intf, "%s,none", newval.psz_string ) == -1 )
- return VLC_ENOMEM;
- p_intf = intf_Create( p_this->p_libvlc, psz_intf );
- free( psz_intf );
- if( p_intf == NULL )
- {
- msg_Err( p_this, "interface "%s" initialization failed",
- newval.psz_string );
- return VLC_EGENERIC;
- }
- /* Try to run the interface */
- if( intf_RunThread( p_intf ) != VLC_SUCCESS )
- {
- vlc_object_detach( p_intf );
- vlc_object_release( p_intf );
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
- }