src/volume.h

   1 /*
   2  * Copyright (C) 2003-2010 The Music Player Daemon Project
   3  * http://www.musicpd.org
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #ifndef MPD_VOLUME_H
  21 #define MPD_VOLUME_H
  22
  23 #include <stdbool.h>
  24 #include <stdio.h>
  25
  26 void volume_init(void);
  27
  28 void volume_finish(void);
  29
  30 int volume_level_get(void);
  31
  32 bool volume_level_change(unsigned volume);
  33
  34 bool
  35 read_sw_volume_state(const char *line);
  36
  37 void save_sw_volume_state(FILE *fp);
  38
  39 /**
  40  * Generates a hash number for the current state of the software
  41  * volume control.  This is used by timer_save_state_file() to
  42  * determine whether the state has changed and the state file should
  43  * be saved.
  44  */
  45 unsigned
  46 sw_volume_state_get_hash(void);
  47
  48 #endif