54 lines
1.4 KiB
GDScript
54 lines
1.4 KiB
GDScript
extends Panel
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enum SyncSource {
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SYSTEM_CLOCK,
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SOUND_CLOCK,
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}
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const BPM = 116
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const BARS = 4
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const COMPENSATE_FRAMES = 2
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const COMPENSATE_HZ = 60.0
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var playing := false
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var sync_source := SyncSource.SYSTEM_CLOCK
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# Used by system clock.
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var time_begin: float
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var time_delay: float
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func _process(_delta: float) -> void:
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if not playing or not $Player.playing:
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return
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var time := 0.0
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if sync_source == SyncSource.SYSTEM_CLOCK:
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# Obtain from ticks.
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time = (Time.get_ticks_usec() - time_begin) / 1000000.0
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# Compensate.
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time -= time_delay
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elif sync_source == SyncSource.SOUND_CLOCK:
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time = $Player.get_playback_position() + AudioServer.get_time_since_last_mix() - AudioServer.get_output_latency() + (1 / COMPENSATE_HZ) * COMPENSATE_FRAMES
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var beat := int(time * BPM / 60.0)
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var seconds := int(time)
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var seconds_total := int($Player.stream.get_length())
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@warning_ignore("integer_division")
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$Label.text = str("BEAT: ", beat % BARS + 1, "/", BARS, " TIME: ", seconds / 60, ":", str(seconds % 60).pad_zeros(2), " / ", seconds_total / 60, ":", str(seconds_total % 60).pad_zeros(2))
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func _on_PlaySystem_pressed() -> void:
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sync_source = SyncSource.SYSTEM_CLOCK
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time_begin = Time.get_ticks_usec()
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time_delay = AudioServer.get_time_to_next_mix() + AudioServer.get_output_latency()
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playing = true
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$Player.play()
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func _on_PlaySound_pressed() -> void:
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sync_source = SyncSource.SOUND_CLOCK
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playing = true
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$Player.play()
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