README.md

BPM-Analyser

Analyser BPM in Swift for your music/sounds/records, whatever.. Powered with Superpowered

Preview:

How To:

Copy theese files to your project:

• BMPAnalyzer.swift
• Superpower directory

Also add theese frameworks to your Linked Frameworks and Libraries

• Add AudioToolbox.framework
• CoreMedia.framework
• AVFoundation
• libSuperpoweredAudioIOS.a (From repo: /src/Superpowered, you added it to project in the previous step

In your code implementation you can call Singleton method by:

 public func getBpmFrom(_ url: URL, completion: (String?) -> ()) -> String

Example:

guard let filePath = Bundle.main.path(forResource: "TestMusic", ofType: "m4a"),
let url = URL(string: filePath) else {return "error occured, check fileURL"}
BPMAnalyzer.core.getBpmFrom(url, completion: nil)

You can stuck it with MPMediaPicker in delegate like this:

import UIKit
import MediaPlayer

class YourClassViewController: UIViewController {

 let mediaPicker: MPMediaPickerController = MPMediaPickerController(mediaTypes: .music)
    lazy var bpmLabel: UILabel = {
        let label = UILabel()
        label.frame.size.height = 300
        label.frame.size.width = UIScreen.main.bounds.width - 32
        label.numberOfLines = 2
        return label
    }()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        mediaPicker.allowsPickingMultipleItems = false
        mediaPicker.delegate = self
        present(mediaPicker, animated: true, completion: nil)
        // Do any additional setup after loading the view, typically from a nib.
    }
}

extension YourClassViewController: MPMediaPickerControllerDelegate {

    func mediaPicker(_ mediaPicker: MPMediaPickerController, didPickMediaItems
        mediaItemCollection: MPMediaItemCollection) {
        guard let asset = mediaItemCollection.items.first,
            let url = asset.assetURL else {return}
        _ = BPMAnalyzer.core.getBpmFrom(url, completion: {[weak self] (bpm) in
            self?.addLabelWith(bpm)
            self?.mediaPicker.dismiss(animated: true, completion: nil)
        })
    }
    
    func addLabelWith(_ bpm: String) {
        bpmLabel.text = String(describing:bpm)
        view.addSubview(bpmLabel)
        bpmLabel.center = view.center
        view.layoutIfNeeded()
    }
}

Look Example project in case of misunderstanding! :)

WHY?

Cause I can :D But in fact, I did't find any libs/frameworks to get BPM from media files...

WHY Superpowered?

Cause it is the fastest lib I have found

Feel FREE to PR or contribuctions/issues/remarks

BUGS/Fixes Contributors:

@o1exij - for the advice and reseraching the bug in BPM counting

@MikaTck - for alerting fatal error + Swift4 migration