Set AVAudioSession, disable screensaver during playback on macOS

Model/Player/ScreenSaverManager.swift

@@ -0,0 +1,34 @@
+import Foundation
+import IOKit.pwr_mgt
+
+struct ScreenSaverManager {
+    static var shared = ScreenSaverManager()
+
+    var noSleepAssertion: IOPMAssertionID = 0
+    var noSleepReturn: IOReturn?
+
+    var enabled: Bool {
+        noSleepReturn == nil
+    }
+
+    @discardableResult mutating func disable(reason: String = "Unknown reason") -> Bool {
+        guard enabled else {
+            return false
+        }
+
+        noSleepReturn = IOPMAssertionCreateWithName(kIOPMAssertionTypeNoDisplaySleep as CFString,
+                                                    IOPMAssertionLevel(kIOPMAssertionLevelOn),
+                                                    reason as CFString,
+                                                    &noSleepAssertion)
+        return noSleepReturn == kIOReturnSuccess
+    }
+
+    @discardableResult mutating func enable() -> Bool {
+        if noSleepReturn != nil {
+            _ = IOPMAssertionRelease(noSleepAssertion) == kIOReturnSuccess
+            noSleepReturn = nil
+            return true
+        }
+        return false
+    }
+}