I used this as a reference: Concatenate two audio files in Swift and play them
I'm trying to create an alarm clock, due to restrictive Apple Policy you cannot execute code in the bg past 10 minutes, if I opt out of bg modes and leave my app in the foreground the "sound" suspends if the user clicks the home button, I need the sound to go on until the user does something. UILocalNotifs don't work due to silent/do not disturb buttons. So I want to run a blank audio until the alarm time and then play sound.
So I used the following to run it:
This is what happens when the save button is clicked (user has selected alarm time)
let seconds = Double(comp.second)
let notification = UILocalNotification()
notification.alertBody = "testBody"
notification.fireDate = dueDatePicker.date
notification.alertTitle = "testTitle"
println("seconds:\(seconds)")
var results:NSArray = managedObjectContext!.executeFetchRequest(request, error: &error)!
let audioURL1 = NSBundle.mainBundle().URLForResource("alarm", withExtension: "m4a")!
let audioURL2 = NSBundle.mainBundle().URLForResource("music", withExtension: "mp3")!
println(audioURL1)
println(audioURL2)
println(task.uuid)
mergeAudio2(audioURL1, audioURL2: audioURL2, time: seconds, uuid: task.uuid)
and this is the merge audio portion:
func mergeAudio2(audioURL: NSURL, audioURL2: NSURL, time:Double, uuid:String) {
var error:NSError?
var ok1 = false
var ok2 = false
//var documentsDirectory:String = paths[0] as! String
//Create AVMutableComposition Object.This object will hold our multiple AVMutableCompositionTrack.
var composition = AVMutableComposition()
var compositionAudioTrack1:AVMutableCompositionTrack = composition.addMutableTrackWithMediaType(AVMediaTypeAudio, preferredTrackID: CMPersistentTrackID())
var compositionAudioTrack2:AVMutableCompositionTrack = composition.addMutableTrackWithMediaType(AVMediaTypeAudio, preferredTrackID: CMPersistentTrackID())
//create new file to receive data
var documentDirectoryURL = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask).first! as! NSURL
var fileDestinationUrl = documentDirectoryURL.URLByAppendingPathComponent("resultmerge.wav")
println(fileDestinationUrl)
var file = "resultmerge.m4a"
var dirs : [String] = (NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.AllDomainsMask, true) as? [String])!
var dir = dirs[0] //documents directory
var path = dir.stringByAppendingPathComponent(file)
var pathURLarray:Array = (NSURL(fileURLWithPath: path)!).pathComponents!
var pathURL:String = ""
var final = ""
var debut = ""
for i in 1...(pathURLarray.count-1) {
if i == pathURLarray.count-1 {
final = ""
} else {
final = "/"
}
if i == 1 {
debut = "/"
} else {
debut = ""
}
pathURL = debut + pathURL + (pathURLarray[i] as! String) + final
}
var checkValidation = NSFileManager.defaultManager()
if checkValidation.fileExistsAtPath(pathURL) {
println("file exist")
if NSFileManager.defaultManager().removeItemAtURL(fileDestinationUrl, error: nil) {
println("delete")
}
} else {
println("no file")
}
var url1 = audioURL
var url2 = audioURL2
var avAsset1 = AVURLAsset(URL: url1, options: nil)
var avAsset2 = AVURLAsset(URL: url2, options: nil)
var tracks1 = avAsset1.tracksWithMediaType(AVMediaTypeAudio)
var tracks2 = avAsset2.tracksWithMediaType(AVMediaTypeAudio)
var assetTrack1:AVAssetTrack = tracks1[0] as! AVAssetTrack
var assetTrack2:AVAssetTrack = tracks2[0] as! AVAssetTrack
var duration1: CMTime = assetTrack1.timeRange.duration
var duration2: CMTime = assetTrack2.timeRange.duration
var timeRange1 = CMTimeRangeMake(kCMTimeZero, duration1)
var timeRange2 = CMTimeRangeMake(duration1, duration2)
ok1 = compositionAudioTrack1.insertTimeRange(timeRange1, ofTrack: assetTrack1, atTime: kCMTimeZero, error: nil)
if ok1 {
ok2 = compositionAudioTrack2.insertTimeRange(timeRange2, ofTrack: assetTrack2, atTime: duration1, error: nil)
if ok2 {
println("success")
}
}
//AVAssetExportPresetPassthrough => concatenation
var assetExport = AVAssetExportSession(asset: composition, presetName: AVAssetExportPresetAppleM4A)
assetExport.outputFileType = AVFileTypeAppleM4A
assetExport.outputURL = fileDestinationUrl
assetExport.exportAsynchronouslyWithCompletionHandler({
switch assetExport.status{
case AVAssetExportSessionStatus.Failed:
println("failed \(assetExport.error)")
case AVAssetExportSessionStatus.Cancelled:
println("cancelled \(assetExport.error)")
default:
println("complete")
var audioPlayer = AVAudioPlayer()
AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, error: nil)
//audioPlayer.delegate = self
audioPlayer = AVAudioPlayer(contentsOfURL: fileDestinationUrl, error: nil)
println(fileDestinationUrl)
audioPlayer.prepareToPlay()
audioPlayer.play()
}
})
}
The app loads up and everything fine, I get the println's of the files and I get the no file, success and completed print out meaning it all executes. But no sound plays
