Today, I create a small app to try ShazamKit music detection ability in iOS 15. Follow a tutorial on Youtube, and I have Apple developer membership and have enabled the ShazamKit service for this app identifier.
In short, I want to detect a song metadata with ShazamKit from the audio file inside app.
The problem is that both of delegate method didFind and didNotFindMatchFor didn't fire though I have generated the signature successfully. I think it should give me an error in didNotFindMatchFor delegate method if there is no match found at least, but it doesn't.
It's a pretty new feature, there is not that much related stuff I could find. What am I missing here? Appreciate for any help.
More info: I do find some stuff using audioEngine, however that use output from Microphone, if user listen music with a headphone, that would be not possible. In my case I want to use the file itself since my production app is a music player, which stores a lot audio files in sandbox.
import ShazamKit
import UIKit
class ViewController: UIViewController {
lazy var recoButton: UIButton = {
let button = UIButton(frame: CGRect(x: 0, y: 0, width: 120, height: 60))
button.layer.cornerRadius = 8
button.backgroundColor = .brown
button.setTitle("Recognize", for: .normal)
button.addTarget(self, action: #selector(recognizeSong), for: .touchUpInside)
return button
}()
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(recoButton)
recoButton.center = view.center
}
@objc func recognizeSong(_ sender: UIButton) {
print("reco button tapped")
// ShazamKit is available from iOS 15
if #available(iOS 15, *) {
// session
let session = SHSession()
// delegate
session.delegate = self
do {
// get track
guard let url = Bundle.main.url(forResource: "Baby One More Time", withExtension: "mp3") else {
print("url is NULLLL")
return }
// create audio file
let file = try AVAudioFile(forReading: url)
let frameCapacity = AVAudioFrameCount(file.length / 26)
// Audio -> Buffer
guard let buffer = AVAudioPCMBuffer(pcmFormat: file.processingFormat, frameCapacity: frameCapacity) else {
print("Failed to create a buffer")
return }
// Read file into buffer
try file.read(into: buffer)
// SignatureGenerator
let generator = SHSignatureGenerator()
try generator.append(buffer, at: nil)
// create signature
let signature = generator.signature()
// try to match
session.match(signature)
} catch {
print(error)
}
} else {
// unavailable alert
}
}
}
extension ViewController: SHSessionDelegate {
func session(_ session: SHSession, didFind match: SHMatch) {
print("Match found!")
// get results
let items = match.mediaItems
items.forEach { item in
print(item.title ?? "title")
print(item.artist ?? "artist")
print(item.artworkURL?.absoluteURL ?? "artwork url")
}
}
func session(_ session: SHSession, didNotFindMatchFor signature: SHSignature, error: Error?) {
if let error = error {
print(error)
}
}
}