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# CMBufferQueueIsEmpty(_:)

Returns a Boolean value that indicates whether a buffer queue is empty.

```
func CMBufferQueueIsEmpty(_ queue: CMBufferQueue) -> Bool
```

## Parameters

`queue`

The `CMBufferQueue` being interrogated.

## Return Value

A Boolean indicating whether the `CMBufferQueue` is empty. If queue is `NULL`, true is returned.

## Discussion

---

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