modules/lua/libs/volume.c

   1 /*****************************************************************************
   2  * volume.c
   3  *****************************************************************************
   4  * Copyright (C) 2007-2008 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Antoine Cellerier <dionoea at videolan tod org>
   8  *          Pierre d'Herbemont <pdherbemont # videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #ifndef  _GNU_SOURCE
  29 #   define  _GNU_SOURCE
  30 #endif
  31
  32 #ifdef HAVE_CONFIG_H
  33 # include "config.h"
  34 #endif
  35
  36 #include <math.h>
  37 #include <vlc_common.h>
  38 #include <vlc_plugin.h>
  39 #include <vlc_meta.h>
  40 #include <vlc_playlist.h>
  41 #include <vlc_aout.h>
  42
  43 #include "../vlc.h"
  44 #include "../libs.h"
  45
  46 /*****************************************************************************
  47  * Volume related
  48  *****************************************************************************/
  49 static int vlclua_volume_set( lua_State *L )
  50 {
  51     playlist_t *p_this = vlclua_get_playlist_internal( L );
  52     int i_volume = luaL_checkint( L, 1 );
  53     if( i_volume < 0 )
  54         i_volume = 0;
  55     int i_ret = playlist_VolumeSet( p_this, i_volume/(float)AOUT_VOLUME_DEFAULT );
  56     return vlclua_push_ret( L, i_ret );
  57 }
  58
  59 static int vlclua_volume_get( lua_State *L )
  60 {
  61     playlist_t *p_this = vlclua_get_playlist_internal( L );
  62     long i_volume = lroundf(playlist_VolumeGet( p_this ) * AOUT_VOLUME_DEFAULT);
  63     lua_pushnumber( L, i_volume );
  64     return 1;
  65 }
  66
  67 static int vlclua_volume_up( lua_State *L )
  68 {
  69     playlist_t *p_this = vlclua_get_playlist_internal( L );
  70     float volume;
  71
  72     playlist_VolumeUp( p_this, (int)luaL_optinteger( L, 1, 1 ), &volume );
  73     lua_pushnumber( L, lroundf(volume * AOUT_VOLUME_DEFAULT) );
  74     return 1;
  75 }
  76
  77 static int vlclua_volume_down( lua_State *L )
  78 {
  79     playlist_t *p_this = vlclua_get_playlist_internal( L );
  80     float volume;
  81
  82     playlist_VolumeDown( p_this, (int)luaL_optinteger( L, 1, 1 ), &volume );
  83     lua_pushnumber( L, lroundf(volume * AOUT_VOLUME_DEFAULT) );
  84     return 1;
  85 }
  86
  87 /*****************************************************************************
  88  *
  89  *****************************************************************************/
  90 static const luaL_Reg vlclua_volume_reg[] = {
  91     { "get", vlclua_volume_get },
  92     { "set", vlclua_volume_set },
  93     { "up", vlclua_volume_up },
  94     { "down", vlclua_volume_down },
  95     { NULL, NULL }
  96 };
  97
  98 void luaopen_volume( lua_State *L )
  99 {
 100     lua_newtable( L );
 101     luaL_register( L, NULL, vlclua_volume_reg );
 102     lua_setfield( L, -2, "volume" );
 103 }