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#ifndef ECHO_H
#define ECHO_H
/* Required headers */
#include <stdint.h>
/* Echo commands */
enum {
ECHO_CMD_NONE, /* 0x00 - No command */
ECHO_CMD_LOADLIST, /* 0x01 - Load instrument list */
ECHO_CMD_PLAYSFX, /* 0x02 - Play a SFX */
ECHO_CMD_STOPSFX, /* 0x03 - Stop SFX playback */
ECHO_CMD_PLAYBGM, /* 0x04 - Play a BGM */
ECHO_CMD_STOPBGM, /* 0x05 - Stop BGM playback */
ECHO_CMD_RESUMEBGM, /* 0x06 - Resume BGM playback */
ECHO_CMD_SETPCMRATE, /* 0x07 - Set PCM rate */
ECHO_CMD_PAUSEBGM, /* 0x08 - Pause BGM playback */
ECHO_CMD_SETSTEREO, /* 0x09 - Toggle stereo */
};
/* Echo status flags */
#define ECHO_STAT_BGM 0x0002 /* Background music is playing */
#define ECHO_STAT_SFX 0x0001 /* Sound effect is playing */
#define ECHO_STAT_PCM 0x2000 /* PCM playback ongoing */
#define ECHO_STAT_DIRBUSY 0x4000 /* Echo isn't done with direct events */
#define ECHO_STAT_BUSY 0x8000 /* Echo still didn't parse command */
/* Function prototypes */
void echo_init(const void* const* list);
void echo_play_bgm(const void *esf);
void echo_stop_bgm(void);
void echo_pause_bgm(void);
void echo_resume_bgm(void);
void echo_play_sfx(const void *esf);
void echo_stop_sfx(void);
void echo_play_direct(const void *esf);
void echo_set_volume(uint8_t vol);
void echo_set_volume_ex(const uint8_t *vol_list);
void echo_set_pcm_rate(uint8_t rate);
uint16_t echo_get_status(void);
uint8_t echo_get_flags(void);
void echo_set_flags(uint8_t flags);
void echo_clear_flags(uint8_t flags);
void echo_send_command(uint8_t cmd);
void echo_send_command_addr(uint8_t cmd, const void *addr);
void echo_send_command_byte(uint8_t cmd, uint8_t byte);
/* Deprecated functions */
static void (* const echo_send_command_ex)(uint8_t, const void *) =
echo_send_command_addr;
/* Look-up tables */
extern const uint8_t echo_fm_vol_table[0x40];
extern const uint8_t echo_psg_vol_table[0x40];
#endif
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