#ifndef AUDIO_H
#define AUDIO_H

#define NB_SOUND        (Byte)4

#define SND_VOLUME      (Byte)0
#define SND_BASS        (Byte)1
#define SND_MEDIUM      (Byte)2
#define SND_TREBLE      (Byte)3

#define VOLUME_MAX      (Byte)31
#define BASS_MAX        (Byte)31
#define MEDIUM_MAX      (Byte)31
#define TREBLE_MAX      (Byte)31

#define VOLUME_MIN      (Byte)0
#define BASS_MIN        (Byte)0
#define MEDIUM_MIN      (Byte)0
#define TREBLE_MIN      (Byte)0

#define VOLUME_MED      (Byte)15
#define BASS_MED        (Byte)15
#define MEDIUM_MED      (Byte)15
#define TREBLE_MED      (Byte)15

/* MP3 Frame Header */
#define MP3_SYNC_H      (Byte)0xFF
#define MP3_SYNC_L      (Byte)0xF0
#define MP3_MSK_SYNC    (Byte)0xF0
#define MP3_MSK_VER     (Byte)0x08
#define MP3_LAYER_III   (Byte)0x02
#define MP3_MSK_LAYER   (Byte)0x06
#define MP3_BR_FREE     (Byte)0x00
#define MP3_BR_224      (Byte)0xC0
#define MP3_BR_256      (Byte)0xD0
#define MP3_BR_320      (Byte)0xE0
#define MP3_BR_112      (Byte)0xB0
#define MP3_BR_144      (Byte)0xD0
#define MP3_BR_160      (Byte)0xE0
#define MP3_MSK_BR      (Byte)0xF0
#define MP3_FS_22       (Byte)0x00
#define MP3_FS_24       (Byte)0x01
#define MP3_FS_16       (Byte)0x02
#define MP3_FS_44       (Byte)0x04
#define MP3_FS_48       (Byte)0x05
#define MP3_FS_32       (Byte)0x06
#define MP3_MSK_FS      (Byte)0x0C
#define MP3_MSK_EMP     (Byte)0x01
#define MP3_MSK_PAD     (Byte)0x02

/* song_init() Return */
#define SONG_MAX_ERR    (Byte)100
#define SONG_NO_ERR     (Byte)0x00          /* each error coded on 1 bit */
#define SONG_LAYER_ERR  (Byte)0x01
#define SONG_BR_ERR     (Byte)0x02
#define SONG_FS_ERR     (Byte)0x04
#define SONG_SYNC_ERR   (Byte)0x08


/*_____ D E F I N I T I O N ________________________________________________*/

#define snd_get_vol() (MP3VOL)
#define snd_get_bas() (MP3BAS)
#define snd_get_med() (MP3MED)
#define snd_get_tre() (MP3TRE)

/*_____ D E C L A R A T I O N ______________________________________________*/

Byte    audio_init (void);
void    snd_start (void);
void    snd_pause (void);
void    snd_stop (void);

void    snd_audio_init (void);
void    snd_init (void);
void    snd_vol_inc(void);
void    snd_bas_inc(void);
void    snd_med_inc(void);
void    snd_tre_inc(void);
void    snd_vol_dec(void);
void    snd_bas_dec(void);
void    snd_med_dec(void);
void    snd_tre_dec(void);

#endif