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268 lines (232 loc) · 8.36 KB
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/*****************************************************************************
* interface.c: interface access for other threads
* This library provides basic functions for threads to interact with user
* interface, such as command line.
*****************************************************************************
* Copyright (C) 1998-2007 VLC authors and VideoLAN
* $Id$
*
* 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 Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/**
* \file
* This file contains functions related to interface management
*/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <unistd.h>
#include <assert.h>
#include <vlc_common.h>
#include <vlc_modules.h>
#include <vlc_interface.h>
#include <vlc_playlist.h>
#include "libvlc.h"
#include "playlist/playlist_internal.h"
#include "../lib/libvlc_internal.h"
static int AddIntfCallback( vlc_object_t *, char const *,
vlc_value_t , vlc_value_t , void * );
/* This lock ensures that the playlist is created only once (per instance). It
* also protects the list of running interfaces against concurrent access,
* either to add or remove an interface.
*
* However, it does NOT protect from destruction of the playlist by
* intf_DestroyAll(). Instead, care must be taken that intf_Create() and any
* other function that depends on the playlist is only called BEFORE
* intf_DestroyAll() has the possibility to destroy all interfaces.
*/
static vlc_mutex_t lock = VLC_STATIC_MUTEX;
/**
* Create and start an interface.
*
* @param playlist playlist and parent object for the interface
* @param chain configuration chain string
* @return VLC_SUCCESS or an error code
*/
int intf_Create( playlist_t *playlist, const char *chain )
{
/* Allocate structure */
intf_thread_t *p_intf = vlc_custom_create( playlist, sizeof( *p_intf ),
"interface" );
if( unlikely(p_intf == NULL) )
return VLC_ENOMEM;
/* Variable used for interface spawning */
vlc_value_t val, text;
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 );
#if !defined(_WIN32) && defined(HAVE_ISATTY)
if( isatty( 0 ) )
#endif
{
val.psz_string = (char *)"rc,none";
text.psz_string = (char *)_("Console");
var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
}
val.psz_string = (char *)"telnet,none";
text.psz_string = (char *)_("Telnet");
var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
val.psz_string = (char *)"http,none";
text.psz_string = (char *)_("Web");
var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
val.psz_string = (char *)"logger,none";
text.psz_string = (char *)_("Debug logging");
var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
val.psz_string = (char *)"gestures,none";
text.psz_string = (char *)_("Mouse Gestures");
var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
var_AddCallback( p_intf, "intf-add", AddIntfCallback, playlist );
/* Choose the best module */
char *module;
p_intf->p_cfg = NULL;
free( config_ChainCreate( &module, &p_intf->p_cfg, chain ) );
p_intf->p_module = module_need( p_intf, "interface", module, true );
free(module);
if( p_intf->p_module == NULL )
{
msg_Err( p_intf, "no suitable interface module" );
goto error;
}
vlc_mutex_lock( &lock );
p_intf->p_next = pl_priv( playlist )->interface;
pl_priv( playlist )->interface = p_intf;
vlc_mutex_unlock( &lock );
return VLC_SUCCESS;
error:
if( p_intf->p_module )
module_unneed( p_intf, p_intf->p_module );
config_ChainDestroy( p_intf->p_cfg );
vlc_object_release( p_intf );
return VLC_EGENERIC;
}
/**
* Creates the playlist if necessary, and return a pointer to it.
* @note The playlist is not reference-counted. So the pointer is only valid
* until intf_DestroyAll() destroys interfaces.
*/
static playlist_t *intf_GetPlaylist(libvlc_int_t *libvlc)
{
playlist_t *playlist;
vlc_mutex_lock(&lock);
playlist = libvlc_priv(libvlc)->playlist;
if (playlist == NULL)
{
playlist = playlist_Create(VLC_OBJECT(libvlc));
libvlc_priv(libvlc)->playlist = playlist;
}
vlc_mutex_unlock(&lock);
return playlist;
}
/**
* Inserts an item in the playlist used by interfaces.
* @note This function may <b>not</b> be called at the same time as
* intf_DestroyAll().
*/
void intf_InsertItem(libvlc_int_t *libvlc, const char *mrl, unsigned optc,
const char *const *optv, unsigned flags)
{
playlist_AddExt(intf_GetPlaylist(libvlc), mrl, NULL, PLAYLIST_INSERT,
0, -1, optc, optv, flags, true, pl_Unlocked);
}
void libvlc_InternalPlay(libvlc_int_t *libvlc)
{
playlist_t *pl;
vlc_mutex_lock(&lock);
pl = libvlc_priv(libvlc)->playlist;
vlc_mutex_unlock(&lock);
if (pl != NULL && var_GetBool(pl, "playlist-autostart"))
playlist_Control(pl, PLAYLIST_PLAY, false);
}
/**
* Starts an interface plugin.
*/
int libvlc_InternalAddIntf(libvlc_int_t *libvlc, const char *name)
{
playlist_t *playlist = intf_GetPlaylist(libvlc);
int ret;
if (unlikely(playlist == NULL))
ret = VLC_ENOMEM;
else
if (name != NULL)
ret = intf_Create(playlist, name);
else
{ /* Default interface */
char *intf = var_InheritString(libvlc, "intf");
if (intf == NULL) /* "intf" has not been set */
{
#if !defined(_WIN32) && !defined(__OS2__)
char *pidfile = var_InheritString(libvlc, "pidfile");
if (pidfile != NULL)
free(pidfile);
else
#endif
msg_Info(libvlc, _("Running vlc with the default interface. "
"Use 'cvlc' to use vlc without interface."));
}
ret = intf_Create(playlist, intf);
free(intf);
name = "default";
}
if (ret != VLC_SUCCESS)
msg_Err(libvlc, "interface \"%s\" initialization failed", name);
return ret;
}
/**
* Stops and destroys all interfaces, then the playlist.
* @warning FIXME
* @param libvlc the LibVLC instance
*/
void intf_DestroyAll(libvlc_int_t *libvlc)
{
playlist_t *playlist;
vlc_mutex_lock(&lock);
playlist = libvlc_priv(libvlc)->playlist;
if (playlist != NULL)
{
intf_thread_t *intf, **pp = &(pl_priv(playlist)->interface);
while ((intf = *pp) != NULL)
{
*pp = intf->p_next;
vlc_mutex_unlock(&lock);
module_unneed(intf, intf->p_module);
config_ChainDestroy(intf->p_cfg);
var_DelCallback(intf, "intf-add", AddIntfCallback, playlist);
vlc_object_release(intf);
vlc_mutex_lock(&lock);
}
libvlc_priv(libvlc)->playlist = NULL;
}
vlc_mutex_unlock(&lock);
if (playlist != NULL)
playlist_Destroy(playlist);
}
/* Following functions are local */
static int AddIntfCallback( vlc_object_t *obj, char const *var,
vlc_value_t old, vlc_value_t cur, void *data )
{
playlist_t *playlist = data;
int ret = intf_Create( playlist, cur.psz_string );
if( ret )
msg_Err( obj, "interface \"%s\" initialization failed",
cur.psz_string );
(void) var; (void) old;
return ret;
}
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