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>
30 lines
1.6 KiB
Swift
30 lines
1.6 KiB
Swift
extension Sound.Synth {
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/// Custom generator callbacks, run on the audio render thread; return quickly.
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/// Samples are signed Q8.24.
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public struct Generator {
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/// Renders `left.count` frames into `left` and `right` (empty if mono). `rate` is the
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/// per-frame Q0.32 phase step, `drate` its per-frame change. Returns frames rendered.
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public var render: (_ left: inout MutableSpan<Int32>,
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_ right: inout MutableSpan<Int32>,
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_ rate: UInt32, _ drate: Int32) -> Int
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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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/// `stop` is `false` on release, `true` on stop.
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public var release: ((_ stop: Bool) -> Void)?
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/// Called by `Synth.setParameter(_:value:)` or a modulator. Returns `true` if valid.
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public var setParameter: ((_ parameter: Int, _ value: Float) -> Bool)?
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public init(render: @escaping (_ left: inout MutableSpan<Int32>,
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_ right: inout MutableSpan<Int32>,
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_ rate: UInt32, _ drate: Int32) -> Int,
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noteOn: ((_ note: Sound.MIDINote, _ velocity: Float, _ length: Float) -> Void)? = nil,
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release: ((_ stop: Bool) -> Void)? = nil,
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setParameter: ((_ parameter: Int, _ value: Float) -> Bool)? = nil) {
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self.render = render
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self.noteOn = noteOn
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self.release = release
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self.setParameter = setParameter
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}
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}
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}
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