CODEWITHSUNDEEP
iosswift3core-audio
BD Wild
BD Wild

Reputation: 189

Can't pass AudioQueueRef inout parameter to AudioQueueNewOutput in Swift

Here is my code: 

var queue: AudioQueueRef
error = AudioQueueNewOutput(&dataFormat, 
AQOutputCallback, 
&player, 
nil, 
nil, 
0, 
&queue) // This gives me an error

I get an error associated with the queue variable: "Cannot pass immutable value as inout argument: implicit conversion from 'AudioQueueRef' to 'AudioQueueRef?' requires a temporary". AudioQueueNewOutput requires that parameter to be of type UnsafeMutablePointer<AudioQueueRef?>. I don't know how to implement that conversion.

Any ideas on how to fix this? Thanks.

Upvotes: 0

Views: 247

Answers (1)

Sohel L.
Sohel L.

Reputation: 9540

As it says that AudioQueueRef must be inout parameter means the same variable will change it's value anytime to new or old. So, you must define it as an Optional like below:

var queue: AudioQueueRef? 

var error = AudioQueueNewOutput(&dataFormat, 
AQOutputCallback, 
&player, 
nil, 
nil, 
0, 
&queue)

Let me know, if you still face any issues.

Upvotes: 2

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