#ifndef _DAC_H#define _DAC_Hint dac_init (void);int dac_getvolume (void);int dac_getbalance (void);int dac_setvolume (int vol);int dac_setbalance (int bal);int dac_getmute (void);int dac_volumeup (void);int dac_volumedown (void);int dac_balanceright (void);int dac_balanceleft (void);int dac_mute (int mute);int dac_write (int addr, int data);int dac_read (int addr);void dac_powerdown_input(const bool down);void dac_powerdown_output(const bool down);#endif