GodotRhythmGameToolbox.gd

extends Object
class_name Rhythmer

class TimeSeeker:
	var begin : float = 0
	var delay : float = 0
	
	func reset() -> void:
		begin = OS.get_ticks_usec()
		delay = AudioServer.get_time_to_next_mix() + AudioServer.get_output_latency()
	
	func update() -> float:
		var time = (OS.get_ticks_usec() - begin) / 1000000.0
		time -= delay
		return time

static func asp_time(ASP : AudioStreamPlayer, is_scaled : bool = false) -> float:
	return (ASP.get_playback_position() + AudioServer.get_time_since_last_mix() - AudioServer.get_output_latency()) / (ASP.pitch_scale if is_scaled else 1.0)


static func beat2sec(beat : float, bpm : int, time_scale : float = 1) -> float:
	return beat * 60.0 / bpm * time_scale


static func sec2beat(sec : float, bpm : int, time_scale : float = 1) -> float:
	return sec * bpm / time_scale * 60.0


static func get_play_latency() -> float:
	return AudioServer.get_time_since_last_mix() - AudioServer.get_output_latency()


static func get_playback_offset(current_time: float, mission_timestamp: float, allocated_time: float, music_pitch_scale: float = 1.0, slave_pitch_scale: float = 1.0) -> float:
	return allocated_time - get_time_offset(current_time, mission_timestamp, music_pitch_scale, slave_pitch_scale)


static func get_time_offset(current_time: float, mission_timestamp: float, music_pitch_scale: float = 1.0, slave_pitch_scale: float = 1.0) -> float:
	var time_playback_latency : float = AudioServer.get_time_since_last_mix()
	return ((mission_timestamp - current_time - AudioServer.get_output_latency()) * slave_pitch_scale + time_playback_latency) / music_pitch_scale