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) 1998-2004 VideoLAN
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;
79 /* Allocate structure */
80 p_intf = vlc_object_create( p_this, VLC_OBJECT_INTF );
83 msg_Err( p_this, "out of memory" );
86 p_intf->pf_request_window = NULL;
87 p_intf->pf_release_window = NULL;
88 p_intf->pf_control_window = NULL;
89 p_intf->b_play = VLC_FALSE;
91 /* Choose the best module */
92 p_intf->p_module = module_Need( p_intf, "interface", psz_module, 0 );
94 if( p_intf->p_module == NULL )
96 msg_Err( p_intf, "no suitable intf module" );
97 vlc_object_destroy( p_intf );
101 /* Initialize structure */
102 p_intf->b_menu = VLC_FALSE;
103 p_intf->b_menu_change = VLC_FALSE;
105 /* Initialize mutexes */
106 vlc_mutex_init( p_intf, &p_intf->change_lock );
108 msg_Dbg( p_intf, "interface initialized" );
110 /* Attach interface to its parent object */
111 vlc_object_attach( p_intf, p_this );
116 /*****************************************************************************
117 * intf_RunThread: launch the interface thread
118 *****************************************************************************
119 * This function either creates a new thread and runs the interface in it,
120 * or runs the interface in the current thread, depending on b_block.
121 *****************************************************************************/
123 * Run the interface thread.
125 * If b_block is not set, runs the interface in the thread, else,
126 * creates a new thread and runs the interface.
127 * \param p_intf the interface thread
128 * \return VLC_SUCCESS on success, an error number else
130 int intf_RunThread( intf_thread_t *p_intf )
132 if( p_intf->b_block )
134 /* Run a manager thread, launch the interface, kill the manager */
135 if( vlc_thread_create( p_intf, "manager", Manager,
136 VLC_THREAD_PRIORITY_LOW, VLC_FALSE ) )
138 msg_Err( p_intf, "cannot spawn manager thread" );
142 RunInterface( p_intf );
144 p_intf->b_die = VLC_TRUE;
146 /* Do not join the thread... intf_StopThread will do it for us */
150 /* Run the interface in a separate thread */
151 if( vlc_thread_create( p_intf, "interface", RunInterface,
152 VLC_THREAD_PRIORITY_LOW, VLC_FALSE ) )
154 msg_Err( p_intf, "cannot spawn interface thread" );
163 * Stops the interface thread
165 * This function asks the interface thread to stop
166 * \param p_intf the interface thread
169 void intf_StopThread( intf_thread_t *p_intf )
171 /* Tell the interface to die */
172 if( !p_intf->b_block )
174 p_intf->b_die = VLC_TRUE;
177 /* Wait for the thread to exit */
178 vlc_thread_join( p_intf );
182 * \brief Destroy the interface after the main loop endeed.
184 * Destroys interfaces and closes output devices
185 * \param p_intf the interface thread
188 void intf_Destroy( intf_thread_t *p_intf )
190 /* Unlock module if present (a switch may have failed) */
191 if( p_intf->p_module )
193 module_Unneed( p_intf, p_intf->p_module );
196 vlc_mutex_destroy( &p_intf->change_lock );
199 vlc_object_destroy( p_intf );
203 /* Following functions are local */
205 /*****************************************************************************
206 * Manager: helper thread for blocking interfaces
207 *****************************************************************************
208 * If the interface is launched in the main thread, it will not listen to
209 * p_vlc->b_die events because it is only supposed to listen to p_intf->b_die.
210 * This thread takes care of the matter.
211 *****************************************************************************/
213 * \brief Helper thread for blocking interfaces.
214 * \ingroup vlc_interface
216 * This is a local function
217 * If the interface is launched in the main thread, it will not listen to
218 * p_vlc->b_die events because it is only supposed to listen to p_intf->b_die.
219 * This thread takes care of the matter.
220 * \see intf_RunThread
221 * \param p_intf an interface thread
224 static void Manager( intf_thread_t *p_intf )
226 while( !p_intf->b_die )
228 msleep( INTF_IDLE_SLEEP );
230 if( p_intf->p_vlc->b_die )
232 p_intf->b_die = VLC_TRUE;
238 /*****************************************************************************
239 * RunInterface: setups necessary data and give control to the interface
240 *****************************************************************************/
241 static void RunInterface( intf_thread_t *p_intf )
243 static char *ppsz_interfaces[] =
247 "wxwindows", "wxWindows",
254 vlc_value_t val, text;
257 /* Variable used for interface switching */
258 p_intf->psz_switch_intf = NULL;
259 var_Create( p_intf, "intf-switch", VLC_VAR_STRING |
260 VLC_VAR_HASCHOICE | VLC_VAR_ISCOMMAND );
261 text.psz_string = _("Switch interface");
262 var_Change( p_intf, "intf-switch", VLC_VAR_SETTEXT, &text, NULL );
264 /* Only fill the list with available modules */
265 p_list = vlc_list_find( p_intf, VLC_OBJECT_MODULE, FIND_ANYWHERE );
266 for( ppsz_parser = ppsz_interfaces; *ppsz_parser; ppsz_parser += 2 )
268 for( i = 0; i < p_list->i_count; i++ )
270 module_t *p_module = (module_t *)p_list->p_values[i].p_object;
271 if( !strcmp( p_module->psz_object_name, ppsz_parser[0] ) )
273 val.psz_string = ppsz_parser[0];
274 text.psz_string = ppsz_parser[1];
275 var_Change( p_intf, "intf-switch", VLC_VAR_ADDCHOICE,
281 vlc_list_release( p_list );
283 var_AddCallback( p_intf, "intf-switch", SwitchIntfCallback, NULL );
285 /* Variable used for interface spawning */
286 var_Create( p_intf, "intf-add", VLC_VAR_STRING |
287 VLC_VAR_HASCHOICE | VLC_VAR_ISCOMMAND );
288 text.psz_string = _("Add Interface");
289 var_Change( p_intf, "intf-add", VLC_VAR_SETTEXT, &text, NULL );
291 val.psz_string = "rc"; text.psz_string = "Console";
292 var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
293 val.psz_string = "telnet"; text.psz_string = "Telnet Interface";
294 var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
295 val.psz_string = "http"; text.psz_string = "Web Interface";
296 var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
297 val.psz_string = "logger"; text.psz_string = "Debug logging";
298 var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
299 val.psz_string = "sap"; text.psz_string = "SAP Playlist";
300 var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
301 val.psz_string = "gestures"; text.psz_string = "Mouse Gestures";
302 var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
304 var_AddCallback( p_intf, "intf-add", AddIntfCallback, NULL );
308 /* Give control to the interface */
309 p_intf->pf_run( p_intf );
311 /* Reset play on start status */
312 p_intf->b_play = VLC_FALSE;
314 if( !p_intf->psz_switch_intf )
319 /* Provide ability to switch the main interface on the fly */
320 psz_intf = p_intf->psz_switch_intf;
321 p_intf->psz_switch_intf = NULL;
323 /* Make sure the old interface is completely uninitialized */
324 module_Unneed( p_intf, p_intf->p_module );
326 vlc_mutex_lock( &p_intf->object_lock );
327 p_intf->b_die = VLC_FALSE;
328 p_intf->b_dead = VLC_FALSE;
329 vlc_mutex_unlock( &p_intf->object_lock );
331 p_intf->p_module = module_Need( p_intf, "interface", psz_intf, 0 );
334 while( p_intf->p_module );
337 static int SwitchIntfCallback( vlc_object_t *p_this, char const *psz_cmd,
338 vlc_value_t oldval, vlc_value_t newval, void *p_data )
340 intf_thread_t *p_intf = (intf_thread_t *)p_this;
342 p_intf->psz_switch_intf =
343 malloc( strlen(newval.psz_string) + sizeof(",none") );
344 sprintf( p_intf->psz_switch_intf, "%s,none", newval.psz_string );
345 p_intf->b_die = VLC_TRUE;
350 static int AddIntfCallback( vlc_object_t *p_this, char const *psz_cmd,
351 vlc_value_t oldval, vlc_value_t newval, void *p_data )
353 intf_thread_t *p_intf;
354 char *psz_intf = malloc( strlen(newval.psz_string) + sizeof(",none") );
356 /* Try to create the interface */
357 sprintf( psz_intf, "%s,none", newval.psz_string );
358 p_intf = intf_Create( p_this->p_vlc, psz_intf );
362 msg_Err( p_this, "interface \"%s\" initialization failed",
367 /* Try to run the interface */
368 p_intf->b_block = VLC_FALSE;
369 if( intf_RunThread( p_intf ) != VLC_SUCCESS )
371 vlc_object_detach( p_intf );
372 intf_Destroy( p_intf );