Switch from Built-in Speaker to Bluetooth Speaker - objective-c

Question

I just found a code that switches the speaker between the built-in and the connected bluetooth speaker:
changeResult = [[AVAudioSession sharedInstance] overrideOutputAudioPort:AVAudioSessionPortOverrideSpeaker
error:&audioError];
But this is in Obj-C, is there anyone here who is kind enough to convert this to Swift?
Thanks!
UPDATE: Here's the code I am using to record a video. Here's the scenario. I am playing a music while the bluetooth speaker is connected. So the sound output is in the external speaker. When I click the record button, the sound output transfers to the built-in speaker. And that is my problem. The output should always be in the external speaker.
#IBAction func record_video(sender: AnyObject) {
var initialOutputURL = NSURL(fileURLWithPath: "")
do
{
initialOutputURL = try NSFileManager.defaultManager().URLForDirectory(.DocumentDirectory, inDomain: .UserDomainMask, appropriateForURL: nil, create: true).URLByAppendingPathComponent("output").URLByAppendingPathExtension("mov")
}catch
{
print(error)
}
if !isRecording
{
isRecording = true
if let outputs = captureSession.outputs as? [AVCaptureOutput] {
for output in outputs {
captureSession.removeOutput(output)
}
}
do
{
try audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord, withOptions: [AVAudioSessionCategoryOptions.MixWithOthers, AVAudioSessionCategoryOptions.AllowBluetooth])
//print(audioSession.setOutputDataSource)
}
catch
{
print("Can't Set Audio Session Category: \(error)")
}
do
{
try audioSession.setMode(AVAudioSessionModeVideoRecording)
}
catch
{
print("Can't Set Audio Session Mode: \(error)")
}
// Start Session
do
{
try audioSession.setActive(true)
}
catch
{
print("Can't Start Audio Session: \(error)")
}
UIView.animateWithDuration(0.5, delay: 0.0, options: [.Repeat, .Autoreverse, .AllowUserInteraction], animations: { () -> Void in
self.record.transform = CGAffineTransformMakeScale(0.75, 0.75)
}, completion: nil)
let audioInputDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeAudio)
AVCaptureDevice.devicesWithMediaType(AVMediaTypeAudio)
do
{
if let availableInputs = audioSession.availableInputs {
for input in availableInputs {
if input.portType == AVAudioSessionPortBuiltInMic ||
input.portType == AVAudioSessionPortHeadsetMic {
inputs.append(input)
try audioSession.setPreferredInput(input)
}
}
}
let audioInput = try AVCaptureDeviceInput(device: audioInputDevice)
// Add Audio Input
if captureSession.canAddInput(audioInput)
{
captureSession.addInput(audioInput)
}
else
{
NSLog("Can't Add Audio Input")
}
/**
let videoInput: AVCaptureDeviceInput
do
{
videoInput = try AVCaptureDeviceInput(device: captureDevice)
// Add Video Input
if captureSession.canAddInput(videoInput)
{
captureSession.addInput(videoInput)
}
else
{
NSLog("ERROR: Can't add video input")
}
}
catch let error
{
NSLog("ERROR: Getting input device: \(error)")
}
*/
try AVAudioSession.sharedInstance().overrideOutputAudioPort(.Speaker)
videoFileOutput = AVCaptureMovieFileOutput()
captureSession.addOutput(videoFileOutput)
captureSession.sessionPreset = AVCaptureSessionPresetHigh
captureSession.automaticallyConfiguresApplicationAudioSession = false
videoFileOutput?.startRecordingToOutputFileURL(initialOutputURL, recordingDelegate: self)
}
catch let error
{
NSLog("Error Getting Input Device: \(error)")
}
}
else
{
isRecording = false
UIView.animateWithDuration(0.5, delay: 0, options: [], animations: { () -> Void in
self.record.transform = CGAffineTransformMakeScale(1.0, 1.0)
}, completion: nil)
record.layer.removeAllAnimations()
videoFileOutput?.stopRecording()
}
}