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 1.107 2003/10/14 22:41:41 gbazin 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 *****************************************************************************/
28 * This file contains functions related to interface management
32 /*****************************************************************************
34 *****************************************************************************/
35 #include <stdlib.h> /* free(), strtol() */
36 #include <stdio.h> /* FILE */
37 #include <string.h> /* strerror() */
41 #include "stream_control.h"
42 #include "input_ext-intf.h"
44 #include "audio_output.h"
46 #include "vlc_interface.h"
48 #include "vlc_video.h"
49 #include "video_output.h"
51 /*****************************************************************************
53 *****************************************************************************/
54 static void Manager( intf_thread_t *p_intf );
55 static void RunInterface( intf_thread_t *p_intf );
57 static int SwitchIntfCallback( vlc_object_t *, char const *,
58 vlc_value_t , vlc_value_t , void * );
59 static int AddIntfCallback( vlc_object_t *, char const *,
60 vlc_value_t , vlc_value_t , void * );
62 /*****************************************************************************
63 * intf_Create: prepare interface before main loop
64 *****************************************************************************
65 * This function opens output devices and creates specific interfaces. It sends
66 * its own error messages.
67 *****************************************************************************/
69 * Create the interface, and prepare it for main loop.
71 * \param p_this the calling vlc_object_t
72 * \param psz_module a prefered interface module
73 * \return a pointer to the created interface thread, NULL on error
75 intf_thread_t* __intf_Create( vlc_object_t *p_this, const char *psz_module )
77 intf_thread_t * p_intf;
80 /* Allocate structure */
81 p_intf = vlc_object_create( p_this, VLC_OBJECT_INTF );
84 msg_Err( p_this, "out of memory" );
88 /* XXX: workaround for a bug in VLC 0.5.0 where the dvdplay plugin was
89 * registering itself in $interface, which we do not want to happen. */
90 psz_intf = config_GetPsz( p_intf, "intf" );
93 if( !strcasecmp( psz_intf, "dvdplay" ) )
95 config_PutPsz( p_intf, "intf", "" );
100 /* Choose the best module */
101 p_intf->p_module = module_Need( p_intf, "interface", psz_module );
103 if( p_intf->p_module == NULL )
105 msg_Err( p_intf, "no suitable intf module" );
106 vlc_object_destroy( p_intf );
110 /* Initialize structure */
111 p_intf->b_menu = VLC_FALSE;
112 p_intf->b_menu_change = VLC_FALSE;
114 /* Initialize mutexes */
115 vlc_mutex_init( p_intf, &p_intf->change_lock );
117 msg_Dbg( p_intf, "interface initialized" );
119 /* Attach interface to its parent object */
120 vlc_object_attach( p_intf, p_this );
125 /*****************************************************************************
126 * intf_RunThread: launch the interface thread
127 *****************************************************************************
128 * This function either creates a new thread and runs the interface in it,
129 * or runs the interface in the current thread, depending on b_block.
130 *****************************************************************************/
132 * Run the interface thread.
134 * If b_block is not set, runs the interface in the thread, else,
135 * creates a new thread and runs the interface.
136 * \param p_intf the interface thread
137 * \return VLC_SUCCESS on success, an error number else
139 int intf_RunThread( intf_thread_t *p_intf )
141 if( p_intf->b_block )
143 /* Run a manager thread, launch the interface, kill the manager */
144 if( vlc_thread_create( p_intf, "manager", Manager,
145 VLC_THREAD_PRIORITY_LOW, VLC_FALSE ) )
147 msg_Err( p_intf, "cannot spawn manager thread" );
151 RunInterface( p_intf );
153 p_intf->b_die = VLC_TRUE;
155 /* Do not join the thread... intf_StopThread will do it for us */
159 /* Run the interface in a separate thread */
160 if( vlc_thread_create( p_intf, "interface", RunInterface,
161 VLC_THREAD_PRIORITY_LOW, VLC_FALSE ) )
163 msg_Err( p_intf, "cannot spawn interface thread" );
171 /*****************************************************************************
172 * intf_StopThread: end the interface thread
173 *****************************************************************************
174 * This function asks the interface thread to stop.
175 *****************************************************************************/
177 * Stops the interface thread
179 * This function asks the interface thread to stop
180 * \param p_intf the interface thread
183 void intf_StopThread( intf_thread_t *p_intf )
185 /* Tell the interface to die */
186 if( !p_intf->b_block )
188 p_intf->b_die = VLC_TRUE;
191 /* Wait for the thread to exit */
192 vlc_thread_join( p_intf );
195 /*****************************************************************************
196 * intf_Destroy: clean interface after main loop
197 *****************************************************************************
198 * This function destroys specific interfaces and close output devices.
199 *****************************************************************************/
201 * \brief Destroy the interface after the main loop endeed.
203 * Destroys interfaces and output devices
204 * \param p_intf the interface thread
207 void intf_Destroy( intf_thread_t *p_intf )
210 module_Unneed( p_intf, p_intf->p_module );
212 vlc_mutex_destroy( &p_intf->change_lock );
215 vlc_object_destroy( p_intf );
219 /* Following functions are local */
221 /*****************************************************************************
222 * Manager: helper thread for blocking interfaces
223 *****************************************************************************
224 * If the interface is launched in the main thread, it will not listen to
225 * p_vlc->b_die events because it is only supposed to listen to p_intf->b_die.
226 * This thread takes care of the matter.
227 *****************************************************************************/
229 * \brief Helper thread for blocking interfaces.
230 * \ingroup vlc_interface
232 * This is a local function
233 * If the interface is launched in the main thread, it will not listen to
234 * p_vlc->b_die events because it is only supposed to listen to p_intf->b_die.
235 * This thread takes care of the matter.
236 * \see intf_RunThread
237 * \param p_intf an interface thread
240 static void Manager( intf_thread_t *p_intf )
242 while( !p_intf->b_die )
244 msleep( INTF_IDLE_SLEEP );
246 if( p_intf->p_vlc->b_die )
248 p_intf->b_die = VLC_TRUE;
254 /*****************************************************************************
255 * RunInterface: setups necessary data and give control to the interface
256 *****************************************************************************/
257 static void RunInterface( intf_thread_t *p_intf )
259 vlc_value_t val, text;
261 /* Variable used for interface switching */
262 p_intf->psz_switch_intf = NULL;
263 var_Create( p_intf, "intf-switch", VLC_VAR_STRING |
264 VLC_VAR_HASCHOICE | VLC_VAR_ISCOMMAND );
265 text.psz_string = _("Switch interface");
266 var_Change( p_intf, "intf-switch", VLC_VAR_SETTEXT, &text, NULL );
268 val.psz_string = "skins"; text.psz_string = "Skins";
269 var_Change( p_intf, "intf-switch", VLC_VAR_ADDCHOICE, &val, &text );
270 val.psz_string = "wxwin"; text.psz_string = "wxWindows";
271 var_Change( p_intf, "intf-switch", VLC_VAR_ADDCHOICE, &val, &text );
273 var_AddCallback( p_intf, "intf-switch", SwitchIntfCallback, NULL );
275 /* Variable used for interface spawning */
276 var_Create( p_intf, "intf-add", VLC_VAR_STRING |
277 VLC_VAR_HASCHOICE | VLC_VAR_ISCOMMAND );
278 text.psz_string = _("Add interface");
279 var_Change( p_intf, "intf-add", VLC_VAR_SETTEXT, &text, NULL );
281 val.psz_string = "rc"; text.psz_string = "Console";
282 var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
283 val.psz_string = "logger"; text.psz_string = "Debug logging";
284 var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
285 val.psz_string = "http"; text.psz_string = "HTTP remote control";
286 var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
288 var_AddCallback( p_intf, "intf-add", AddIntfCallback, NULL );
290 /* Give control to the interface */
291 p_intf->pf_run( p_intf );
293 /* Provide ability to switch the main interface on the fly */
294 while( p_intf->psz_switch_intf )
296 char *psz_intf = p_intf->psz_switch_intf;
297 p_intf->psz_switch_intf = NULL;
298 p_intf->b_die = VLC_FALSE;
300 /* Make sure the old interface is completely uninitialised */
301 module_Unneed( p_intf, p_intf->p_module );
303 p_intf->p_module = module_Need( p_intf, "interface", psz_intf );
306 if( p_intf->p_module )
308 p_intf->pf_run( p_intf );
314 static int SwitchIntfCallback( vlc_object_t *p_this, char const *psz_cmd,
315 vlc_value_t oldval, vlc_value_t newval, void *p_data )
317 intf_thread_t *p_intf = (intf_thread_t *)p_this;
319 p_intf->psz_switch_intf =
320 malloc( strlen(newval.psz_string) + sizeof(",none") );
321 sprintf( p_intf->psz_switch_intf, "%s,none", newval.psz_string );
322 p_intf->b_die = VLC_TRUE;
327 static int AddIntfCallback( vlc_object_t *p_this, char const *psz_cmd,
328 vlc_value_t oldval, vlc_value_t newval, void *p_data )
330 intf_thread_t *p_intf;
331 char *psz_intf = malloc( strlen(newval.psz_string) + sizeof(",none") );
333 /* Try to create the interface */
334 sprintf( psz_intf, "%s,none", newval.psz_string );
335 p_intf = intf_Create( p_this, psz_intf );
339 msg_Err( p_this, "interface \"%s\" initialization failed",
344 /* Try to run the interface */
345 p_intf->b_block = VLC_FALSE;
346 if( intf_RunThread( p_intf ) != VLC_SUCCESS )
348 vlc_object_detach( p_intf );
349 intf_Destroy( p_intf );