Don't divide by zero for single output device

LT · LT · commit 9bda7c0cb28b · 2021-03-01T10:41:38.000-08:00
diff --git a/DynamicsIllusion/VolumeViewController.swift b/DynamicsIllusion/VolumeViewController.swift
@@ -25,11 +25,12 @@ class VolumeViewController: NSViewController, NSTableViewDataSource {
             let balanceMax = (balance < 50.0) ? 100.0 - balance : balance,
                 balanceLeft = (100.0 - balance) / balanceMax,
                 balanceRight = balance / balanceMax,
-                count = selectedDevices!.count,
+                deviceCount = selectedDevices!.count,
+                count = (deviceCount == 1) ? 1 : deviceCount - 1,
                 balanceDelta = balanceRight - balanceLeft
 
             for (index, device) in selectedDevices!.enumerated() {
-                let bal = balanceLeft + balanceDelta * Float(index) / Float(count - 1)
+                let bal = balanceLeft + balanceDelta * Float(index) / Float(count)
                 Audio.setDeviceVolume(deviceID: device, leftChannelLevel: bal * value, rightChannelLevel: bal * value)
             }
         }

Original file line number	Diff line number	Diff line change
`@@ -25,11 +25,12 @@ class VolumeViewController: NSViewController, NSTableViewDataSource {`
`25`	`25`	`let balanceMax = (balance < 50.0) ? 100.0 - balance : balance,`
`26`	`26`	`balanceLeft = (100.0 - balance) / balanceMax,`
`27`	`27`	`balanceRight = balance / balanceMax,`
`28`		`- count = selectedDevices!.count,`
	`28`	`+ deviceCount = selectedDevices!.count,`
	`29`	`+ count = (deviceCount == 1) ? 1 : deviceCount - 1,`
`29`	`30`	`balanceDelta = balanceRight - balanceLeft`
`30`	`31`
`31`	`32`	`for (index, device) in selectedDevices!.enumerated() {`
`32`		`- let bal = balanceLeft + balanceDelta * Float(index) / Float(count - 1)`
	`33`	`+ let bal = balanceLeft + balanceDelta * Float(index) / Float(count)`
`33`	`34`	`Audio.setDeviceVolume(deviceID: device, leftChannelLevel: bal * value, rightChannelLevel: bal * value)`
`34`	`35`	`}`
`35`	`36`	`}`