Hi there!
In my app, I have a very simple class that serves as a key-value cache. The
whole thing is basically a lazily populated [String: AVAudioPCMBuffer]
dictionary with a String -> AVAudioPCMBuffer function that generates values as
needed:
final class PlayerAudioCache {
// MARK: Retrieving audio buffers
func audioBufferForAssetWithName(name: String) -> AVAudioPCMBuffer? {
addAudioBufferForAssetWithNameIfNeeded(name)
return cachedAudioBuffers[name]
}
// MARK: Adding audio buffers
func addAudioBufferForAssetWithNameIfNeeded(name: String) {
guard cachedAudioBuffers[name] == nil else { return }
addAudioBufferForAssetWithName(name)
}
private func addAudioBufferForAssetWithName(name: String) {
guard let dataAsset = NSDataAsset(name: name) else { fatalError() }
cachedAudioBuffers[name] = dataAsset.map { URL -> AVAudioPCMBuffer in
AVAudioPCMBuffer(contentsOfURL: URL)!
}
}
private var cachedAudioBuffers: [String: AVAudioPCMBuffer] = [:]
}
I feel like there is a pre-made type in Swift’s standard library for what I’m
doing here. Am I right?
Ideas? Pointers?
Thank you!
R+_______________________________________________
swift-users mailing list
swift-users@swift.org
https://lists.swift.org/mailman/listinfo/swift-users
