vlc/modules/lua/libs/misc.c

/*****************************************************************************
 * misc.c
 *****************************************************************************
 * Copyright (C) 2007-2008 the VideoLAN team
 *
 * Authors: Antoine Cellerier <dionoea at videolan tod org>
 *          Pierre d'Herbemont <pdherbemont # videolan.org>
 *          Rémi Duraffort <ivoire # videolan tod org>
 *
 * 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
 * the Free Software Foundation; either version 2 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 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#ifndef  _GNU_SOURCE
#   define  _GNU_SOURCE
#endif

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <math.h>
#include <stdlib.h>

#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_meta.h>
#include <vlc_interface.h>
#include <vlc_actions.h>
#include <vlc_interrupt.h>
#include <vlc_rand.h>

#include "../vlc.h"
#include "../libs.h"
#include "misc.h"

/*****************************************************************************
 * Internal lua<->vlc utils
 *****************************************************************************/
void vlclua_set_object( lua_State *L, void *id, void *value )
{
    lua_pushlightuserdata( L, id );
    lua_pushlightuserdata( L, value );
    lua_rawset( L, LUA_REGISTRYINDEX );
}

void *vlclua_get_object( lua_State *L, void *id )
{
    lua_pushlightuserdata( L, id );
    lua_rawget( L, LUA_REGISTRYINDEX );
    const void *p = lua_topointer( L, -1 );
    lua_pop( L, 1 );
    return (void *)p;
}

#undef vlclua_set_this
void vlclua_set_this( lua_State *L, vlc_object_t *p_this )
{
    vlclua_set_object( L, vlclua_set_this, p_this );
}

vlc_object_t * vlclua_get_this( lua_State *L )
{
    return vlclua_get_object( L, vlclua_set_this );
}

/*****************************************************************************
 * VLC error code translation
 *****************************************************************************/
int vlclua_push_ret( lua_State *L, int i_error )
{
    lua_pushnumber( L, i_error );
    lua_pushstring( L, vlc_error_string( i_error ) );
    return 2;
}

/*****************************************************************************
 * Get the VLC version string
 *****************************************************************************/
static int vlclua_version( lua_State *L )
{
    lua_pushstring( L, VERSION_MESSAGE );
    return 1;
}

/*****************************************************************************
 * Get the VLC copyright
 *****************************************************************************/
static int vlclua_copyright( lua_State *L )
{
    lua_pushliteral( L, COPYRIGHT_MESSAGE );
    return 1;
}

/*****************************************************************************
 * Get the VLC license msg/disclaimer
 *****************************************************************************/
static int vlclua_license( lua_State *L )
{
    lua_pushstring( L, LICENSE_MSG );
    return 1;
}

/*****************************************************************************
 * Quit VLC
 *****************************************************************************/
static int vlclua_quit( lua_State *L )
{
    vlc_object_t *p_this = vlclua_get_this( L );
    /* The rc.c code also stops the playlist ... not sure if this is needed
     * though. */
    libvlc_Quit( vlc_object_instance(p_this) );
    return 0;
}

static int vlclua_mdate( lua_State *L )
{
    lua_pushnumber( L, vlc_tick_now() );
    return 1;
}

static int vlclua_mwait( lua_State *L )
{
    double f = luaL_checknumber( L, 1 );

    vlc_interrupt_t *oint = vlclua_set_interrupt( L );
    int ret = vlc_mwait_i11e( llround(f) );

    vlc_interrupt_set( oint );
    if( ret )
        return luaL_error( L, "Interrupted." );
    return 0;
}

static int vlclua_action_id( lua_State *L )
{
    vlc_action_id_t i_key = vlc_actions_get_id( luaL_checkstring( L, 1 ) );
    if (i_key == 0)
        return 0;
    lua_pushnumber( L, i_key );
    return 1;
}

/*****************************************************************************
 *
 *****************************************************************************/
static const luaL_Reg vlclua_misc_reg[] = {
    { "version", vlclua_version },
    { "copyright", vlclua_copyright },
    { "license", vlclua_license },

    { "action_id", vlclua_action_id },

    { "mdate", vlclua_mdate },
    { "mwait", vlclua_mwait },

    { "quit", vlclua_quit },

    { NULL, NULL }
};

void luaopen_misc( lua_State *L )
{
    lua_newtable( L );
    luaL_register( L, NULL, vlclua_misc_reg );
    lua_setfield( L, -2, "misc" );
}