javier
c5037dd716
This PR contains the work done to update the library and the attached example project to use the Swift 6.4 computer as a minimum supported version and also, to use the latest features introduced in it. Reviewed-on: #1 Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
24 lines
1.3 KiB
Swift
24 lines
1.3 KiB
Swift
extension Sound.Signal {
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/// Custom signal callbacks, run on the audio render thread; return quickly.
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public struct Callbacks {
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/// Returns the value at the end of the cycle; `ioFrames` holds its frames left. For
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/// a mid-cycle value, write it to `interpolationValue`, set `ioFrames` to its offset.
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public var step: (_ ioFrames: UnsafeMutablePointer<Int32>?,
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_ interpolationValue: UnsafeMutablePointer<Float>?) -> Float
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/// `length` is in seconds, or -1 if indefinite.
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public var noteOn: ((_ note: Sound.MIDINote, _ velocity: Float, _ length: Float) -> Void)?
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/// `stopped` is `false` on release, `true` on stop; `offset` is the frame offset
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/// into the cycle.
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public var noteOff: ((_ stopped: Bool, _ offset: Int) -> Void)?
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public init(step: @escaping (_ ioFrames: UnsafeMutablePointer<Int32>?,
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_ interpolationValue: UnsafeMutablePointer<Float>?) -> Float,
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noteOn: ((_ note: Sound.MIDINote, _ velocity: Float, _ length: Float) -> Void)? = nil,
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noteOff: ((_ stopped: Bool, _ offset: Int) -> Void)? = nil) {
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self.step = step
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self.noteOn = noteOn
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self.noteOff = noteOff
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}
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}
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}
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