55 lines
2.1 KiB
Swift
55 lines
2.1 KiB
Swift
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internal import CPlaydate
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extension Sound {
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/// A source of audio: the base class of `FilePlayer`, `SamplePlayer`,
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/// `Synth`, `DelayLineTap`, and `CallbackSource`. Wraps `SoundSource`.
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public class Source {
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private static var api: UnsafePointer<playdate_sound_source> { Playdate.sourceAPI.unsafelyUnwrapped }
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/// The underlying C object. Set once, immediately after creation.
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var pointer: OpaquePointer!
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let isOwned: Bool
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var finishCallback: ((Source) -> Void)?
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init(pointer: OpaquePointer?, isOwned: Bool) {
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self.pointer = pointer
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self.isOwned = isOwned
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}
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/// Sets the playback volume for the left and right channels, 0...1.
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public func setVolume(left: Float, right: Float) {
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Source.api.pointee.setVolume.unsafelyUnwrapped(pointer, left, right)
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}
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/// Sets the playback volume of both channels.
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public func setVolume(_ volume: Float) {
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setVolume(left: volume, right: volume)
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}
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/// The playback volume of the left and right channels.
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public var volume: (left: Float, right: Float) {
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var left: Float = 0, right: Float = 0
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Source.api.pointee.getVolume.unsafelyUnwrapped(pointer, &left, &right)
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return (left, right)
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}
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public var isPlaying: Bool {
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Source.api.pointee.isPlaying.unsafelyUnwrapped(pointer) != 0
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}
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/// Sets a function called when the source finishes playing.
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public func setFinishCallback(_ callback: ((Source) -> Void)?) {
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finishCallback = callback
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if callback != nil {
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Source.api.pointee.setFinishCallback.unsafelyUnwrapped(pointer, { _, userdata in
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guard let userdata else { return }
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let source = Unmanaged<Source>.fromOpaque(userdata).takeUnretainedValue()
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source.finishCallback?(source)
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}, Unmanaged.passUnretained(self).toOpaque())
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} else {
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Source.api.pointee.setFinishCallback.unsafelyUnwrapped(pointer, nil, nil)
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}
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}
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}
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}
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