extends 'res://scripts/loaders/snes/music.gd'

# In real OOP these would be static or static const, but GDScript doesn't allow that
func _init() -> void:
	# Durations are in pulses, 48 = 1 quarter note (crotchet)
	self.NOTE_DURATIONS = PoolByteArray([192, 144, 96, 64, 72, 48, 32, 36, 24, 16, 12, 8, 6, 4, 3])  # See ROM 0x041D7E to 0x041D8C
	self.REFERENCE_NOTE = 71

	self.EVENT_MAP = {
		0xD2: EventType.VOLUME,
		0xD3: EventType.VOLUME_SLIDE,
		0xD4: EventType.PAN,
		0xD5: EventType.PAN_SLIDE,
		0xD6: EventType.PITCH_SLIDE,
		0xD7: EventType.VIBRATO_ON,
		0xD8: EventType.VIBRATO_OFF,
		0xD9: EventType.TREMOLO_ON,
		0xDA: EventType.TREMOLO_OFF,
		0xDB: EventType.PAN_LFO_ON,
		0xDC: EventType.PAN_LFO_OFF,
		0xDD: EventType.NOISE_FREQ,
		0xDE: EventType.NOISE_ON,
		0xDF: EventType.NOISE_OFF,
		0xE0: EventType.PITCHMOD_ON,
		0xE1: EventType.PITCHMOD_OFF,
		0xE2: EventType.ECHO_ON,
		0xE3: EventType.ECHO_OFF,
		0xE4: EventType.OCTAVE,
		0xE5: EventType.OCTAVE_UP,
		0xE6: EventType.OCTAVE_DOWN,
		0xE7: EventType.TRANSPOSE_ABS,
		0xE8: EventType.TRANSPOSE_REL,
		0xE9: EventType.TUNING,
		0xEA: EventType.PROGCHANGE,
		0xEB: EventType.ADSR_ATTACK,
		0xEC: EventType.ADSR_DECAY,
		0xED: EventType.ADSR_SUSTAIN,
		0xEE: EventType.ADSR_RELEASE,
		0xEF: EventType.ADSR_DEFAULT,
		0xF0: EventType.LOOP_START,
		0xF1: EventType.LOOP_END,
		0xF2: EventType.END,
		0xF3: EventType.TEMPO,
		0xF4: EventType.TEMPO_SLIDE,
		0xF5: EventType.ECHO_VOLUME,
		0xF6: EventType.ECHO_VOLUME_SLIDE,
		0xF7: EventType.ECHO_FEEDBACK_FIR,
		0xF8: EventType.MASTER_VOLUME,
		0xF9: EventType.LOOP_BREAK,
		0xFA: EventType.GOTO,
		0xFB: EventType.CPU_CONTROLLED_JUMP,
		0xFC: EventType.END,
		0xFD: EventType.END,
		0xFE: EventType.END,
		0xFF: EventType.END,
	}