]> git.sesse.net Git - vlc/blobdiff - src/interface/interface.c
* OSX lowlevel work
[vlc] / src / interface / interface.c
index d0c217352ff61eba8ff3e19132664167a0a1c415..f729444aa25cf77899c1675777ee8e57fad742e3 100644 (file)
@@ -3,9 +3,10 @@
  * This library provides basic functions for threads to interact with user
  * interface, such as command line.
  *****************************************************************************
- * Copyright (C) 1998, 1999, 2000 VideoLAN
+ * Copyright (C) 1998-2004 VideoLAN
+ * $Id$
  *
- * Authors:
+ * 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
  *
  * 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.
+ * 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., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  *****************************************************************************/
 
+/**
+ *   \file
+ *   This file contains functions related to interface management
+ */
+
+
 /*****************************************************************************
  * Preamble
  *****************************************************************************/
-#include "defs.h"
-
-#include <errno.h>                                                 /* ENOMEM */
 #include <stdlib.h>                                      /* free(), strtol() */
 #include <stdio.h>                                                   /* FILE */
 #include <string.h>                                            /* strerror() */
-#include <sys/types.h>                        /* on BSD, uio.h needs types.h */
-#include <sys/uio.h>                                          /* for input.h */
 
-#include "config.h"
-#include "common.h"
-#include "threads.h"
-#include "mtime.h"
-#include "plugins.h"
-#include "input.h"
+#include <vlc/vlc.h>
+#include <vlc/input.h>
 
 #include "audio_output.h"
 
-#include "intf_msg.h"
-#include "interface.h"
-#include "intf_cmd.h"
-#include "intf_console.h"
-
-#include "video.h"
+#include "vlc_interface.h"
+#include "vlc_video.h"
 #include "video_output.h"
 
-#include "main.h"
-
-/*****************************************************************************
- * intf_channel_t: channel description
- *****************************************************************************
- * A 'channel' is a descriptor of an input method. It is used to switch easily
- * from source to source without having to specify the whole input thread
- * configuration. The channels array, stored in the interface thread object, is
- * loaded in intf_Create, and unloaded in intf_Destroy.
- *****************************************************************************/
-typedef struct intf_channel_s
-{
-    /* Channel description */
-    int         i_channel;            /* channel number, -1 for end of array */
-    char *      psz_description;              /* channel description (owned) */
-
-    /* Input configuration */
-    int         i_input_method;                   /* input method descriptor */
-    char *      psz_input_source;                   /* source string (owned) */
-    int         i_input_port;                                        /* port */
-    int         i_input_vlan;                                        /* vlan */
-} intf_channel_t;
+#ifdef SYS_DARWIN
+#    include "Cocoa/Cocoa.h"
+#endif /* SYS_DARWIN */
 
 /*****************************************************************************
  * Local prototypes
  *****************************************************************************/
-static int      LoadChannels    ( intf_thread_t *p_intf, char *psz_filename );
-static void     UnloadChannels  ( intf_thread_t *p_intf );
-static int      ParseChannel    ( intf_channel_t *p_channel, char *psz_str );
+static void Manager( intf_thread_t *p_intf );
+static void RunInterface( intf_thread_t *p_intf );
+
+static int SwitchIntfCallback( vlc_object_t *, char const *,
+                               vlc_value_t , vlc_value_t , void * );
+static int AddIntfCallback( vlc_object_t *, char const *,
+                            vlc_value_t , vlc_value_t , void * );
 
 /*****************************************************************************
  * intf_Create: prepare interface before main loop
@@ -88,516 +66,355 @@ static int      ParseChannel    ( intf_channel_t *p_channel, char *psz_str );
  * This function opens output devices and creates specific interfaces. It sends
  * its own error messages.
  *****************************************************************************/
-intf_thread_t* intf_Create( void )
+/**
+ * Create the interface, and prepare it for main loop.
+ *
+ * \param p_this the calling vlc_object_t
+ * \param psz_module a prefered 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;
-    char * psz_method;
+    intf_thread_t * p_intf;
 
     /* Allocate structure */
-    p_intf = malloc( sizeof( intf_thread_t ) );
+    p_intf = vlc_object_create( p_this, VLC_OBJECT_INTF );
     if( !p_intf )
     {
-        intf_ErrMsg("error: %s\n", strerror( ENOMEM ) );
-        return( NULL );
+        msg_Err( p_this, "out of memory" );
+        return NULL;
     }
+    p_intf->pf_request_window = NULL;
+    p_intf->pf_release_window = NULL;
+    p_intf->pf_control_window = NULL;
+    p_intf->b_play = VLC_FALSE;
 
-    /* Request an interface plugin */
-    psz_method = main_GetPszVariable( VOUT_METHOD_VAR, VOUT_DEFAULT_METHOD );
+    /* Choose the best module */
+    p_intf->p_module = module_Need( p_intf, "interface", psz_module, 0 );
 
-    if( RequestPlugin( &p_intf->intf_plugin, "intf", psz_method ) < 0 )
+    if( p_intf->p_module == NULL )
     {
-        intf_ErrMsg( "error: could not open interface plugin intf_%s.so\n", psz_method );
-        free( p_intf );
-        return( NULL );
+        msg_Err( p_intf, "no suitable intf module" );
+        vlc_object_destroy( p_intf );
+        return NULL;
     }
 
-    /* Get plugins */
-    p_intf->p_sys_create
-            = GetPluginFunction( p_intf->intf_plugin, "intf_SysCreate" );
-    p_intf->p_sys_manage
-            = GetPluginFunction( p_intf->intf_plugin, "intf_SysManage" );
-    p_intf->p_sys_destroy
-            = GetPluginFunction( p_intf->intf_plugin, "intf_SysDestroy" );
-
     /* Initialize structure */
-    p_intf->b_die =     0;
-    p_intf->p_vout =    NULL;
-    p_intf->p_input =   NULL;
-
-    /* Load channels - the pointer will be set to NULL on failure. The
-     * return value is ignored since the program can work without
-     * channels */
-    LoadChannels( p_intf, main_GetPszVariable( INTF_CHANNELS_VAR, INTF_CHANNELS_DEFAULT ));
-
-    /* Start interfaces */
-    p_intf->p_console = intf_ConsoleCreate();
-    if( p_intf->p_console == NULL )
-    {
-        intf_ErrMsg("error: can't create control console\n");
-        TrashPlugin( p_intf->intf_plugin );
-        free( p_intf );
-        return( NULL );
-    }
-    if( p_intf->p_sys_create( p_intf ) )
-    {
-        intf_ErrMsg("error: can't create interface\n");
-        intf_ConsoleDestroy( p_intf->p_console );
-        TrashPlugin( p_intf->intf_plugin );
-        free( p_intf );
-        return( NULL );
-    }
+    p_intf->b_menu        = VLC_FALSE;
+    p_intf->b_menu_change = VLC_FALSE;
+
+    /* Initialize mutexes */
+    vlc_mutex_init( p_intf, &p_intf->change_lock );
+
+    msg_Dbg( p_intf, "interface initialized" );
+
+    /* Attach interface to its parent object */
+    vlc_object_attach( p_intf, p_this );
 
-    intf_Msg("Interface initialized\n");
-    return( p_intf );
+    return p_intf;
 }
 
 /*****************************************************************************
- * intf_Run
+ * intf_RunThread: launch the interface thread
  *****************************************************************************
- * Initialization script and main interface loop.
+ * This function either creates a new thread and runs the interface in it,
+ * or runs the interface in the current thread, depending on b_block.
  *****************************************************************************/
-void intf_Run( intf_thread_t *p_intf )
+/**
+ * Run the interface thread.
+ *
+ * If b_block is not set, runs the interface in the thread, else,
+ * creates a new thread and runs the interface.
+ * \param p_intf the interface thread
+ * \return VLC_SUCCESS on success, an error number else
+ */
+int intf_RunThread( intf_thread_t *p_intf )
 {
-    /* Execute the initialization script - if a positive number is returned,
-     * the script could be executed but failed */
-    if( intf_ExecScript( main_GetPszVariable( INTF_INIT_SCRIPT_VAR, INTF_INIT_SCRIPT_DEFAULT ) ) > 0 )
+#ifdef SYS_DARWIN
+    if( p_intf->b_block )
     {
-        intf_ErrMsg("warning: error(s) during startup script\n");
+        /* This is the primary intf */
+        /* Run a manager thread, launch the interface, kill the manager */
+        if( vlc_thread_create( p_intf, "manager", Manager,
+                               VLC_THREAD_PRIORITY_LOW, VLC_FALSE ) )
+        {
+            msg_Err( p_intf, "cannot spawn manager thread" );
+            return VLC_EGENERIC;
+        }
     }
 
-    /* Main loop */
-    while(!p_intf->b_die)
+    if( p_intf->b_block && !strncmp( p_intf->p_module->psz_shortname, "macosx" , 6 ) )
     {
-        /* Flush waiting messages */
-        intf_FlushMsg();
-
-        /* Manage specific interface */
-        p_intf->p_sys_manage( p_intf );
+       /* this is OSX, we are cheating :)
+           This is NOT I REPEAT NOT blocking since [NSApp run] is */
+       p_intf->b_block = VLC_FALSE;
 
-        /* Check attached threads status */
-        if( (p_intf->p_vout != NULL) && p_intf->p_vout->b_error )
+        RunInterface( p_intf );
+       p_intf->b_block = VLC_TRUE;
+    }
+    else if( p_intf->b_block && !strncmp( p_intf->p_vlc->psz_object_name, "clivlc", 6 ) )
+    {
+        /* VLC OS X in cli mode ( no blocking [NSApp run] )
+           this is equal to running in normal non-OSX primary intf mode */
+        RunInterface( p_intf );
+        p_intf->b_die = VLC_TRUE;
+    }
+    else
+    {
+        /* If anything else is the primary intf and we are not in cli mode,
+           then don't make it blocking ([NSApp run] will be blocking) 
+           but run it in a seperate thread. */
+        p_intf->b_block = VLC_FALSE;
+#else
+    if( p_intf->b_block )
+    {
+        /* Run a manager thread, launch the interface, kill the manager */
+        if( vlc_thread_create( p_intf, "manager", Manager,
+                               VLC_THREAD_PRIORITY_LOW, VLC_FALSE ) )
         {
-            /* FIXME: add aout error detection ?? */
-            p_intf->b_die = 1;
+            msg_Err( p_intf, "cannot spawn manager thread" );
+            return VLC_EGENERIC;
         }
-        if( (p_intf->p_input != NULL) && p_intf->p_input->b_error )
+
+        RunInterface( p_intf );
+
+        p_intf->b_die = VLC_TRUE;
+        /* Do not join the thread... intf_StopThread will do it for us */
+    }
+    else
+    {
+#endif
+        /* Run the interface in a separate thread */
+        if( vlc_thread_create( p_intf, "interface", RunInterface,
+                               VLC_THREAD_PRIORITY_LOW, VLC_FALSE ) )
         {
-            input_DestroyThread( p_intf->p_input, NULL );
-            p_intf->p_input = NULL;
-            intf_DbgMsg("Input thread destroyed\n");
+            msg_Err( p_intf, "cannot spawn interface thread" );
+            return VLC_EGENERIC;
         }
+    }
 
-        /* Sleep to avoid using all CPU - since some interfaces needs to access
-         * keyboard events, a 100ms delay is a good compromise */
-        msleep( INTF_IDLE_SLEEP );
+    return VLC_SUCCESS;
+}
+
+/**
+ * Stops the interface thread
+ *
+ * This function asks the interface thread to stop
+ * \param p_intf the interface thread
+ * \return nothing
+ */
+void intf_StopThread( intf_thread_t *p_intf )
+{
+    /* Tell the interface to die */
+    if( !p_intf->b_block )
+    {
+        p_intf->b_die = VLC_TRUE;
     }
+
+    /* Wait for the thread to exit */
+    vlc_thread_join( p_intf );
 }
 
-/*****************************************************************************
- * intf_Destroy: clean interface after main loop
- *****************************************************************************
- * This function destroys specific interfaces and close output devices.
- *****************************************************************************/
+/**
+ * \brief Destroy the interface after the main loop endeed.
+ *
+ * Destroys interfaces and closes output devices
+ * \param p_intf the interface thread
+ * \return nothing
+ */
 void intf_Destroy( intf_thread_t *p_intf )
 {
-    /* Destroy interfaces */
-    p_intf->p_sys_destroy( p_intf );
-    intf_ConsoleDestroy( p_intf->p_console );
-
-    /* Unload channels */
-    UnloadChannels( p_intf );
+    /* Unlock module if present (a switch may have failed) */
+    if( p_intf->p_module )
+    {
+        module_Unneed( p_intf, p_intf->p_module );
+    }
 
-    /* Close plugin */
-    TrashPlugin( p_intf->intf_plugin );
+    vlc_mutex_destroy( &p_intf->change_lock );
 
     /* Free structure */
-    free( p_intf );
+    vlc_object_destroy( p_intf );
 }
 
+
+/* Following functions are local */
+
 /*****************************************************************************
- * intf_SelectChannel: change channel
+ * Manager: helper thread for blocking interfaces
  *****************************************************************************
- * Kill existing input, if any, and try to open a new one, using an input
- * configuration table.
+ * If the interface is launched in the main thread, it will not listen to
+ * p_vlc->b_die events because it is only supposed to listen to p_intf->b_die.
+ * This thread takes care of the matter.
  *****************************************************************************/
-int intf_SelectChannel( intf_thread_t * p_intf, int i_channel )
+/**
+ * \brief Helper thread for blocking interfaces.
+ * \ingroup vlc_interface
+ *
+ * This is a local function
+ * If the interface is launched in the main thread, it will not listen to
+ * p_vlc->b_die events because it is only supposed to listen to p_intf->b_die.
+ * This thread takes care of the matter.
+ * \see intf_RunThread
+ * \param p_intf an interface thread
+ * \return nothing
+ */
+static void Manager( intf_thread_t *p_intf )
 {
-    intf_channel_t *    p_channel;                                /* channel */
-
-    /* Look for channel in array */
-    if( p_intf->p_channel != NULL )
+    while( !p_intf->b_die )
     {
-        for( p_channel = p_intf->p_channel; p_channel->i_channel != -1; p_channel++ )
+        msleep( INTF_IDLE_SLEEP );
+
+        if( p_intf->p_vlc->b_die )
         {
-            if( p_channel->i_channel == i_channel )
-            {
-                /*
-                 * Change channel
-                 */
-
-                /* Kill existing input, if any */
-                if( p_intf->p_input != NULL )
-                {
-                    input_DestroyThread( p_intf->p_input, NULL );
-                }
-
-                intf_Msg("Channel %d: %s\n", i_channel, p_channel->psz_description );
-
-                /* Open a new input */
-                p_intf->p_input = input_CreateThread( p_channel->i_input_method, p_channel->psz_input_source,
-                                                      p_channel->i_input_port, p_channel->i_input_vlan,
-                                                      p_intf->p_vout, p_main->p_aout, NULL );
-                return( p_intf->p_input == NULL );
-            }
+            p_intf->b_die = VLC_TRUE;
+#ifdef SYS_DARWIN
+    if( strncmp( p_intf->p_vlc->psz_object_name, "clivlc", 6 ) )
+    {
+        [NSApp stop: NULL];
+    }
+#endif
+            return;
         }
     }
-
-    /* Channel does not exist */
-    intf_Msg("Channel %d does not exist\n", i_channel );
-    return( 1 );
 }
 
 /*****************************************************************************
- * intf_ProcessKey: process standard keys
- *****************************************************************************
- * This function will process standard keys and return non 0 if the key was
- * unknown.
+ * RunInterface: setups necessary data and give control to the interface
  *****************************************************************************/
-int intf_ProcessKey( intf_thread_t *p_intf, int i_key )
+static void RunInterface( intf_thread_t *p_intf )
 {
-    static int i_volbackup;
-    
-    switch( i_key )
+    static char *ppsz_interfaces[] =
     {
-    case 'Q':                                                  /* quit order */
-    case 'q':
-    case 27:                                                   /* escape key */
-    case 3:                                                            /* ^C */
-        p_intf->b_die = 1;
-        break;
-    case '0':                                               /* source change */
-    case '1':
-    case '2':
-    case '3':
-    case '4':
-    case '5':
-    case '6':
-    case '7':
-    case '8':
-    case '9':
-        /* Change channel - return code is ignored since SelectChannel displays
-         * its own error messages */
-        intf_SelectChannel( p_intf, i_key - '0' );
-        break;
-    case '+':                                                    /* volume + */
-        if( (p_main->p_aout != NULL) && (p_main->p_aout->vol < VOLMAX) )
-            p_main->p_aout->vol += VOLSTEP;
-        break;
-    case '-':                                                    /* volume - */
-        if( (p_main->p_aout != NULL) && (p_main->p_aout->vol > VOLSTEP) )
-            p_main->p_aout->vol -= VOLSTEP;
-        break;
-    case 'M':                                                 /* toggle mute */
-    case 'm':
-        if( (p_main->p_aout != NULL) && (p_main->p_aout->vol))
-        {
-            i_volbackup = p_main->p_aout->vol;
-            p_main->p_aout->vol = 0;
-        }
-        else if( (p_main->p_aout != NULL) && (!p_main->p_aout->vol))
-            p_main->p_aout->vol = i_volbackup;
-        break;
-    case 'g':                                                     /* gamma - */
-        if( (p_intf->p_vout != NULL) && (p_intf->p_vout->f_gamma > -INTF_GAMMA_LIMIT) )
-        {
-            vlc_mutex_lock( &p_intf->p_vout->change_lock );
-            p_intf->p_vout->f_gamma   -= INTF_GAMMA_STEP;
-            p_intf->p_vout->i_changes |= VOUT_GAMMA_CHANGE;
-            vlc_mutex_unlock( &p_intf->p_vout->change_lock );
-        }
-        break;
-    case 'G':                                                     /* gamma + */
-        if( (p_intf->p_vout != NULL) && (p_intf->p_vout->f_gamma < INTF_GAMMA_LIMIT) )
-        {
-            vlc_mutex_lock( &p_intf->p_vout->change_lock );
-            p_intf->p_vout->f_gamma   += INTF_GAMMA_STEP;
-            p_intf->p_vout->i_changes |= VOUT_GAMMA_CHANGE;
-            vlc_mutex_unlock( &p_intf->p_vout->change_lock );
-        }
-        break;
-    case 'c':                                            /* toggle grayscale */
-        if( p_intf->p_vout != NULL )
-        {
-            vlc_mutex_lock( &p_intf->p_vout->change_lock );
-            p_intf->p_vout->b_grayscale = !p_intf->p_vout->b_grayscale;
-            p_intf->p_vout->i_changes  |= VOUT_GRAYSCALE_CHANGE;
-            vlc_mutex_unlock( &p_intf->p_vout->change_lock );
-        }
-        break;
-    case ' ':                                            /* toggle interface */
-        if( p_intf->p_vout != NULL )
-        {
-            vlc_mutex_lock( &p_intf->p_vout->change_lock );
-            p_intf->p_vout->b_interface     = !p_intf->p_vout->b_interface;
-            p_intf->p_vout->i_changes |= VOUT_INTF_CHANGE;
-            vlc_mutex_unlock( &p_intf->p_vout->change_lock );
-        }
-        break;
-    case 'i':                                                 /* toggle info */
-        if( p_intf->p_vout != NULL )
-        {
-            vlc_mutex_lock( &p_intf->p_vout->change_lock );
-            p_intf->p_vout->b_info     = !p_intf->p_vout->b_info;
-            p_intf->p_vout->i_changes |= VOUT_INFO_CHANGE;
-            vlc_mutex_unlock( &p_intf->p_vout->change_lock );
-        }
-        break;
-    case 's':                                              /* toggle scaling */
-        if( p_intf->p_vout != NULL )
+        "skins", "Skins",
+        "skins2", "Skins 2",
+        "wxwindows", "wxWindows",
+        NULL, NULL
+    };
+    char **ppsz_parser;
+
+    vlc_list_t *p_list;
+    int i;
+    vlc_value_t val, text;
+    char *psz_intf;
+
+    /* Variable used for interface switching */
+    p_intf->psz_switch_intf = NULL;
+    var_Create( p_intf, "intf-switch", VLC_VAR_STRING |
+                VLC_VAR_HASCHOICE | VLC_VAR_ISCOMMAND );
+    text.psz_string = _("Switch interface");
+    var_Change( p_intf, "intf-switch", VLC_VAR_SETTEXT, &text, NULL );
+
+    /* Only fill the list with available modules */
+    p_list = vlc_list_find( p_intf, VLC_OBJECT_MODULE, FIND_ANYWHERE );
+    for( ppsz_parser = ppsz_interfaces; *ppsz_parser; ppsz_parser += 2 )
+    {
+        for( i = 0; i < p_list->i_count; i++ )
         {
-            vlc_mutex_lock( &p_intf->p_vout->change_lock );
-            p_intf->p_vout->b_scale    = !p_intf->p_vout->b_scale;
-            p_intf->p_vout->i_changes |= VOUT_SCALE_CHANGE;
-            vlc_mutex_unlock( &p_intf->p_vout->change_lock );
+            module_t *p_module = (module_t *)p_list->p_values[i].p_object;
+            if( !strcmp( p_module->psz_object_name, ppsz_parser[0] ) )
+            {
+                val.psz_string = ppsz_parser[0];
+                text.psz_string = ppsz_parser[1];
+                var_Change( p_intf, "intf-switch", VLC_VAR_ADDCHOICE,
+                            &val, &text );
+                break;
+            }
         }
-        break;
-   default:                                                   /* unknown key */
-        return( 1 );
     }
-
-    return( 0 );
-}
-
-/* following functions are local */
-
-/*****************************************************************************
- * LoadChannels: load channels description from a file
- *****************************************************************************
- * This structe describes all interface-specific data of the main (interface)
- * thread.
- * Each line of the file is a semicolon separated list of the following
- * fields :
- *      integer         channel number
- *      string          channel description
- *      integer         input method (see input.h)
- *      string          input source
- *      integer         input port
- *      integer         input vlan
- * The last field must end with a semicolon.
- * Comments and empty lines are not explicitely allowed, but lines with parsing
- * errors are ignored without warning.
- *****************************************************************************/
-static int LoadChannels( intf_thread_t *p_intf, char *psz_filename )
-{
-    FILE *              p_file;                                      /* file */
-    intf_channel_t *    p_channel;                        /* current channel */
-    char                psz_line[INTF_MAX_CMD_SIZE];          /* line buffer */
-    int                 i_index;                   /* channel or field index */
-
-    /* Set default value */
-    p_intf->p_channel = NULL;
-
-    /* Open file */
-    p_file = fopen( psz_filename, "r" );
-    if( p_file == NULL )
+    vlc_list_release( p_list );
+
+    var_AddCallback( p_intf, "intf-switch", SwitchIntfCallback, NULL );
+
+    /* 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 = "rc"; text.psz_string = "Console";
+    var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
+    val.psz_string = "telnet"; text.psz_string = "Telnet Interface";
+    var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
+    val.psz_string = "http"; text.psz_string = "Web Interface";
+    var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
+    val.psz_string = "logger"; text.psz_string = "Debug logging";
+    var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
+    val.psz_string = "sap"; text.psz_string = "SAP Playlist";
+    var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
+    val.psz_string = "gestures"; text.psz_string = "Mouse Gestures";
+    var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
+
+    var_AddCallback( p_intf, "intf-add", AddIntfCallback, NULL );
+
+    do
     {
-        intf_ErrMsg("error: can't open %s (%s)\n", psz_filename, strerror(errno));
-        return( 1 );
-    }
+        /* Give control to the interface */
+        p_intf->pf_run( p_intf );
 
-    /* First pass: count number of lines */
-    for( i_index = 0; fgets( psz_line, INTF_MAX_CMD_SIZE, p_file ) != NULL; i_index++ )
-    {
-        ;
-    }
+        /* Reset play on start status */
+        p_intf->b_play = VLC_FALSE;
 
-    if( i_index != 0 )
-    {
-        /* Allocate array and rewind - some of the lines may be invalid, and the
-         * array will probably be larger than the actual number of channels, but
-         * it has no consequence. */
-        p_intf->p_channel = malloc( sizeof( intf_channel_t ) * i_index );
-        if( p_intf->p_channel == NULL )
+        if( !p_intf->psz_switch_intf )
         {
-            intf_ErrMsg("error: %s\n", strerror(ENOMEM));
-            fclose( p_file );
-            return( 1 );
+            break;
         }
-        p_channel = p_intf->p_channel;
-        rewind( p_file );
 
-        /* Second pass: read channels descriptions */
-        while( fgets( psz_line, INTF_MAX_CMD_SIZE, p_file ) != NULL )
-        {
-            if( !ParseChannel( p_channel, psz_line ) )
-            {
-                intf_DbgMsg( "channel [%d] %s : method %d (%s:%d vlan %d)\n",
-                         p_channel->i_channel, p_channel->psz_description,
-                         p_channel->i_input_method,
-                         p_channel->psz_input_source,
-                         p_channel->i_input_port, p_channel->i_input_vlan );
-                p_channel++;
-            }
-        }
+        /* Make sure the old interface is completely uninitialized */
+        module_Unneed( p_intf, p_intf->p_module );
 
-        /* Add marker at the end of the array */
-        p_channel->i_channel = -1;
-    }
+        /* Provide ability to switch the main interface on the fly */
+        psz_intf = p_intf->psz_switch_intf;
+        p_intf->psz_switch_intf = NULL;
+
+        vlc_mutex_lock( &p_intf->object_lock );
+        p_intf->b_die = VLC_FALSE;
+        p_intf->b_dead = VLC_FALSE;
+        vlc_mutex_unlock( &p_intf->object_lock );
 
-    /* Close file */
-    fclose( p_file );
-    return( 0 );
+        p_intf->p_module = module_Need( p_intf, "interface", psz_intf, 0 );
+        free( psz_intf );
+    }
+    while( p_intf->p_module );
 }
 
-/*****************************************************************************
- * UnloadChannels: unload channels description
- *****************************************************************************
- * This function free all resources allocated by LoadChannels, if any.
- *****************************************************************************/
-static void UnloadChannels( intf_thread_t *p_intf )
+static int SwitchIntfCallback( vlc_object_t *p_this, char const *psz_cmd,
+                         vlc_value_t oldval, vlc_value_t newval, void *p_data )
 {
-    int i_channel;                                          /* channel index */
+    intf_thread_t *p_intf = (intf_thread_t *)p_this;
 
-    if( p_intf->p_channel != NULL )
-    {
-        /* Free allocated strings */
-        for( i_channel = 0;
-             p_intf->p_channel[ i_channel ].i_channel != -1;
-             i_channel++ )
-        {
-            if( p_intf->p_channel[ i_channel ].psz_description != NULL )
-            {
-                free( p_intf->p_channel[ i_channel ].psz_description );
-            }
-            if( p_intf->p_channel[ i_channel ].psz_input_source != NULL )
-            {
-                free( p_intf->p_channel[ i_channel ].psz_input_source );
-            }
-        }
+    p_intf->psz_switch_intf =
+        malloc( strlen(newval.psz_string) + sizeof(",none") );
+    sprintf( p_intf->psz_switch_intf, "%s,none", newval.psz_string );
+    p_intf->b_die = VLC_TRUE;
 
-        /* Free array */
-        free( p_intf->p_channel );
-        p_intf->p_channel = NULL;
-    }
+    return VLC_SUCCESS;
 }
 
-
-/*****************************************************************************
- * ParseChannel: parse a channel description line
- *****************************************************************************
- * See LoadChannels. This function return non 0 on parsing error.
- *****************************************************************************/
-static int ParseChannel( intf_channel_t *p_channel, char *psz_str )
+static int AddIntfCallback( vlc_object_t *p_this, char const *psz_cmd,
+                         vlc_value_t oldval, vlc_value_t newval, void *p_data )
 {
-    char *      psz_index;                              /* current character */
-    char *      psz_end;                           /* end pointer for strtol */
-    int         i_field;                        /* field number, -1 on error */
-    int         i_field_length;             /* field length, for text fields */
-
-    /* Set some default fields */
-    p_channel->i_channel =              0;
-    p_channel->psz_description =        NULL;
-    p_channel->i_input_method =         0;
-    p_channel->psz_input_source =       NULL;
-    p_channel->i_input_port =           0;
-    p_channel->i_input_vlan =           0;
-
-    /* Parse string */
-    i_field = 0;
-    for( psz_index = psz_str; (i_field != -1) && (*psz_index != '\0'); psz_index++ )
-    {
-        if( *psz_index == ';' )
-        {
-            /* Mark end of field */
-            *psz_index = '\0';
-
-            /* Parse field */
-            switch( i_field++ )
-            {
-            case 0:                                        /* channel number */
-                p_channel->i_channel = strtol( psz_str, &psz_end, 0);
-                if( (*psz_str == '\0') || (*psz_end != '\0') )
-                {
-                    i_field = -1;
-                }
-                break;
-            case 1:                                   /* channel description */
-                i_field_length = strlen( psz_str );
-                if( i_field_length != 0 )
-                {
-                    p_channel->psz_description = malloc( i_field_length + 1 );
-                    if( p_channel->psz_description == NULL )
-                    {
-                        intf_ErrMsg("error: %s\n", strerror( ENOMEM ));
-                        i_field = -1;
-                    }
-                    else
-                    {
-                        strcpy( p_channel->psz_description, psz_str );
-                    }
-                }
-                break;
-            case 2:                                          /* input method */
-                p_channel->i_input_method = strtol( psz_str, &psz_end, 0);
-                if( (*psz_str == '\0') || (*psz_end != '\0') )
-                {
-                    i_field = -1;
-                }
-                break;
-            case 3:                                          /* input source */
-                i_field_length = strlen( psz_str );
-                if( i_field_length != 0 )
-                {
-                    p_channel->psz_input_source = malloc( i_field_length + 1 );
-                    if( p_channel->psz_input_source == NULL )
-                    {
-                        intf_ErrMsg("error: %s\n", strerror( ENOMEM ));
-                        i_field = -1;
-                    }
-                    else
-                    {
-                        strcpy( p_channel->psz_input_source, psz_str );
-                    }
-                }
-                break;
-            case 4:                                            /* input port */
-                p_channel->i_input_port = strtol( psz_str, &psz_end, 0);
-                if( (*psz_str == '\0') || (*psz_end != '\0') )
-                {
-                    i_field = -1;
-                }
-                break;
-            case 5:                                            /* input vlan */
-                p_channel->i_channel = strtol( psz_str, &psz_end, 0);
-                if( (*psz_str == '\0') || (*psz_end != '\0') )
-                {
-                    i_field = -1;
-                }
-                break;
-                /* ... following fields are ignored */
-            }
+    intf_thread_t *p_intf;
+    char *psz_intf = malloc( strlen(newval.psz_string) + sizeof(",none") );
 
-            /* Set new beginning of field */
-            psz_str = psz_index + 1;
-        }
+    /* Try to create the interface */
+    sprintf( psz_intf, "%s,none", newval.psz_string );
+    p_intf = intf_Create( p_this->p_vlc, psz_intf );
+    free( psz_intf );
+    if( p_intf == NULL )
+    {
+        msg_Err( p_this, "interface \"%s\" initialization failed",
+                 newval.psz_string );
+        return VLC_EGENERIC;
     }
 
-    /* At least the first three fields must be parsed sucessfully for function
-     * success. Other parsing errors are returned using i_field = -1. */
-    if( i_field < 3 )
+    /* Try to run the interface */
+    p_intf->b_block = VLC_FALSE;
+    if( intf_RunThread( p_intf ) != VLC_SUCCESS )
     {
-        /* Function fails. Free allocated strings */
-        if( p_channel->psz_description != NULL )
-        {
-            free( p_channel->psz_description );
-        }
-        if( p_channel->psz_input_source != NULL )
-        {
-            free( p_channel->psz_input_source );
-        }
-        return( 1 );
+        vlc_object_detach( p_intf );
+        intf_Destroy( p_intf );
+        return VLC_EGENERIC;
     }
 
-    /* Return success */
-    return( 0 );
+    return VLC_SUCCESS;
 }