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63 lines
1.8 KiB
GDScript
63 lines
1.8 KiB
GDScript
extends Control
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class_name DialogicBackgroundMusic
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onready var _track1 := $Track1
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onready var _track2 := $Track2
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var current_path = ""
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var current_track = null
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func _ready():
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$Tween.connect("tween_completed", self, "_on_Tween_tween_completed")
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func crossfade_to(path: String, audio_bus:String, volume:float, fade_length: float) -> void:
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# find a better solution for this
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if _track1.playing and _track2.playing:
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return
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var stream: AudioStream = load(path)
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var fade_out_track = _track1
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var fade_in_track = _track2
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if _track2.playing:
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fade_out_track = _track2
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fade_in_track = _track1
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# setup the new track
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fade_in_track.stream = stream
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fade_in_track.bus = audio_bus
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fade_in_track.volume_db = -60
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$Tween.interpolate_property(fade_out_track, "volume_db", null, -60, fade_length, Tween.TRANS_EXPO)
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$Tween.interpolate_property(fade_in_track, "volume_db", -60, volume, fade_length, Tween.TRANS_EXPO)
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$Tween.start()
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# in case the audio is already playing we will attempt a fade into the new one from the current position
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if current_path == path:
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fade_in_track.play(fade_out_track.get_playback_position())
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# else just play it from the beginning
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else:
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fade_in_track.play()
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current_track = fade_in_track
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current_path = path
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func fade_out(fade_length:float = 1) -> void:
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current_path = ""
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current_track = null
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$Tween.interpolate_property(_track1, "volume_db", null, -60, fade_length, Tween.TRANS_EXPO)
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$Tween.interpolate_property(_track2, "volume_db", null, -60, fade_length, Tween.TRANS_EXPO)
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$Tween.start()
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func _on_Tween_tween_completed(object, key):
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# if the stream was faded out
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if object.volume_db == -60:
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object.playing = false
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object.stream = null
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func get_current_info():
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if current_track != null:
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return {"file":current_path, "volume": current_track.volume_db, "audio_bus": current_track.bus}
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return null
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