1 /*****************************************************************************
2 * interface.c: interface access for other threads
3 * This library provides basic functions for threads to interact with user
4 * interface, such as command line.
5 *****************************************************************************
6 * Copyright (C) 1998-2001 VideoLAN
7 * $Id: interface.c,v 1.101 2002/11/10 18:04:23 sam Exp $
9 * Authors: Vincent Seguin <seguin@via.ecp.fr>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
24 *****************************************************************************/
26 /*****************************************************************************
28 *****************************************************************************/
29 #include <stdlib.h> /* free(), strtol() */
30 #include <stdio.h> /* FILE */
31 #include <string.h> /* strerror() */
35 #include "stream_control.h"
36 #include "input_ext-intf.h"
38 #include "audio_output.h"
40 #include "interface.h"
43 #include "video_output.h"
45 /*****************************************************************************
47 *****************************************************************************/
48 static void Manager( intf_thread_t *p_intf );
50 /*****************************************************************************
51 * intf_Create: prepare interface before main loop
52 *****************************************************************************
53 * This function opens output devices and creates specific interfaces. It sends
54 * its own error messages.
55 *****************************************************************************/
56 intf_thread_t* __intf_Create( vlc_object_t *p_this )
58 intf_thread_t * p_intf;
60 /* Allocate structure */
61 p_intf = vlc_object_create( p_this, VLC_OBJECT_INTF );
64 msg_Err( p_this, "out of memory" );
68 /* Choose the best module */
69 p_intf->p_module = module_Need( p_intf, "interface", "$intf" );
71 if( p_intf->p_module == NULL )
73 msg_Err( p_intf, "no suitable intf module" );
74 vlc_object_destroy( p_intf );
78 /* Initialize structure */
79 p_intf->b_menu = VLC_FALSE;
80 p_intf->b_menu_change = VLC_FALSE;
82 /* Initialize mutexes */
83 vlc_mutex_init( p_intf, &p_intf->change_lock );
85 msg_Dbg( p_intf, "interface initialized" );
87 /* Attach interface to its parent object */
88 vlc_object_attach( p_intf, p_this );
93 /*****************************************************************************
94 * intf_RunThread: launch the interface thread
95 *****************************************************************************
96 * This function either creates a new thread and runs the interface in it,
97 * or runs the interface in the current thread, depending on b_block.
98 *****************************************************************************/
99 int intf_RunThread( intf_thread_t *p_intf )
101 if( p_intf->b_block )
103 /* Run a manager thread, launch the interface, kill the manager */
104 if( vlc_thread_create( p_intf, "manager", Manager,
105 VLC_THREAD_PRIORITY_LOW, VLC_FALSE ) )
107 msg_Err( p_intf, "cannot spawn manager thread" );
111 p_intf->pf_run( p_intf );
113 p_intf->b_die = VLC_TRUE;
115 /* Do not join the thread... intf_StopThread will do it for us */
119 /* Run the interface in a separate thread */
120 if( vlc_thread_create( p_intf, "interface", p_intf->pf_run,
121 VLC_THREAD_PRIORITY_LOW, VLC_FALSE ) )
123 msg_Err( p_intf, "cannot spawn interface thread" );
131 /*****************************************************************************
132 * intf_StopThread: end the interface thread
133 *****************************************************************************
134 * This function asks the interface thread to stop.
135 *****************************************************************************/
136 void intf_StopThread( intf_thread_t *p_intf )
138 /* Tell the interface to die */
139 if( !p_intf->b_block )
141 p_intf->b_die = VLC_TRUE;
144 /* Wait for the thread to exit */
145 vlc_thread_join( p_intf );
148 /*****************************************************************************
149 * intf_Destroy: clean interface after main loop
150 *****************************************************************************
151 * This function destroys specific interfaces and close output devices.
152 *****************************************************************************/
153 void intf_Destroy( intf_thread_t *p_intf )
156 module_Unneed( p_intf, p_intf->p_module );
158 vlc_mutex_destroy( &p_intf->change_lock );
161 vlc_object_destroy( p_intf );
164 /* Following functions are local */
166 /*****************************************************************************
167 * Manager: helper thread for blocking interfaces
168 *****************************************************************************
169 * If the interface is launched in the main thread, it will not listen to
170 * p_vlc->b_die events because it is only supposed to listen to p_intf->b_die.
171 * This thread takes care of the matter.
172 *****************************************************************************/
173 static void Manager( intf_thread_t *p_intf )
175 while( !p_intf->b_die )
177 msleep( INTF_IDLE_SLEEP );
179 if( p_intf->p_vlc->b_die )
181 p_intf->b_die = VLC_TRUE;