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 1.95 2002/06/01 18:04:49 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 <errno.h> /* ENOMEM */
30 #include <stdlib.h> /* free(), strtol() */
31 #include <stdio.h> /* FILE */
32 #include <string.h> /* strerror() */
33 #include <sys/types.h> /* off_t */
37 #include "stream_control.h"
38 #include "input_ext-intf.h"
40 #include "audio_output.h"
42 #include "interface.h"
45 #include "video_output.h"
47 /*****************************************************************************
49 *****************************************************************************/
50 static void Manager( intf_thread_t *p_intf );
52 /*****************************************************************************
53 * intf_Create: prepare interface before main loop
54 *****************************************************************************
55 * This function opens output devices and creates specific interfaces. It sends
56 * its own error messages.
57 *****************************************************************************/
58 intf_thread_t* __intf_Create( vlc_object_t *p_this )
60 intf_thread_t * p_intf;
63 /* Allocate structure */
64 p_intf = vlc_object_create( p_this, VLC_OBJECT_INTF );
67 msg_Err( p_this, "out of memory" );
71 /* Choose the best module */
72 psz_name = config_GetPsz( p_intf, "intf" );
73 p_intf->p_module = module_Need( p_intf, MODULE_CAPABILITY_INTF,
74 psz_name, (void *)p_intf );
76 if( psz_name ) free( psz_name );
77 if( p_intf->p_module == NULL )
79 msg_Err( p_intf, "no suitable intf module" );
80 vlc_object_destroy( p_intf );
84 #define f p_intf->p_module->p_functions->intf.functions.intf
85 p_intf->pf_open = f.pf_open;
86 p_intf->pf_close = f.pf_close;
87 p_intf->pf_run = f.pf_run;
90 /* Initialize structure */
92 p_intf->b_menu_change = 0;
94 /* Initialize mutexes */
95 vlc_mutex_init( p_intf, &p_intf->change_lock );
97 msg_Dbg( p_intf, "interface initialized" );
99 /* An interface's parent is always the root */
100 vlc_object_attach( p_intf, p_intf->p_vlc );
105 /*****************************************************************************
106 * intf_RunThread: launch the interface thread
107 *****************************************************************************
108 * This function either creates a new thread and runs the interface in it,
109 * or runs the interface in the current thread, depending on b_block.
110 *****************************************************************************/
111 vlc_error_t intf_RunThread( intf_thread_t *p_intf )
113 if( p_intf->b_block )
115 /* Run a manager thread, launch the interface, kill the manager */
116 if( vlc_thread_create( p_intf, "manager", Manager, 0 ) )
118 msg_Err( p_intf, "cannot spawn manager thread" );
122 p_intf->pf_run( p_intf );
126 /* Do not join the thread... intf_StopThread will do it for us */
130 /* Run the interface in a separate thread */
131 if( vlc_thread_create( p_intf, "interface", p_intf->pf_run, 0 ) )
133 msg_Err( p_intf, "cannot spawn interface thread" );
141 /*****************************************************************************
142 * intf_StopThread: end the interface thread
143 *****************************************************************************
144 * This function asks the interface thread to stop.
145 *****************************************************************************/
146 void intf_StopThread( intf_thread_t *p_intf )
148 /* Tell the interface to die */
149 if( !p_intf->b_block )
154 /* Wait for the thread to exit */
155 vlc_thread_join( p_intf );
158 /*****************************************************************************
159 * intf_Destroy: clean interface after main loop
160 *****************************************************************************
161 * This function destroys specific interfaces and close output devices.
162 *****************************************************************************/
163 void intf_Destroy( intf_thread_t *p_intf )
165 /* Destroy interface */
166 p_intf->pf_close( p_intf );
169 module_Unneed( p_intf->p_module );
171 vlc_mutex_destroy( &p_intf->change_lock );
174 vlc_object_destroy( p_intf );
177 /* Following functions are local */
179 /*****************************************************************************
180 * Manager: helper thread for blocking interfaces
181 *****************************************************************************
182 * If the interface is launched in the main thread, it will not listen to
183 * p_vlc->b_die events because it is only supposed to listen to p_intf->b_die.
184 * This thread takes care of the matter.
185 *****************************************************************************/
186 static void Manager( intf_thread_t *p_intf )
188 while( !p_intf->b_die )
190 msleep( INTF_IDLE_SLEEP );
192 if( p_intf->p_vlc->b_die )