Dimitris C
67 lines
1.6 KiB
Swift
67 lines
1.6 KiB
Swift
//
|
|
// EqualzerViewModel.swift
|
|
// AudioExample
|
|
//
|
|
// Created by Dimitrios Chatzieleftheriou on 15/11/2020.
|
|
// Copyright © 2020 Dimitrios Chatzieleftheriou. All rights reserved.
|
|
//
|
|
|
|
import AVFoundation
|
|
|
|
struct EQBand {
|
|
let frequency: String
|
|
let min: Float
|
|
let max: Float
|
|
let value: Float
|
|
}
|
|
|
|
final class EqualzerViewModel {
|
|
private var bands: [EQBand] = []
|
|
|
|
private let equalizerService: EqualizerService
|
|
|
|
var equaliserIsOn: Bool {
|
|
equalizerService.isActivated
|
|
}
|
|
|
|
init(equalizerService: EqualizerService) {
|
|
self.equalizerService = equalizerService
|
|
|
|
bands = equalizerService.bands.map { item in
|
|
var measurement = item.frequency
|
|
var frequency = String(Int(measurement))
|
|
if item.frequency >= 1000 {
|
|
measurement = item.frequency / 1000
|
|
frequency = "\(String(Int(measurement)))K"
|
|
}
|
|
return EQBand(frequency: frequency, min: -12, max: 12, value: item.gain)
|
|
}
|
|
}
|
|
|
|
func enableEq(_ enable: Bool) {
|
|
if enable {
|
|
equalizerService.activate()
|
|
} else {
|
|
equalizerService.deactivate()
|
|
}
|
|
}
|
|
|
|
func resetEq(updateSliders: (_ value: Float) -> Void) {
|
|
equalizerService.reset()
|
|
updateSliders(0)
|
|
}
|
|
|
|
func update(gain: Float, for index: Int) {
|
|
equalizerService.update(gain: gain, for: index)
|
|
}
|
|
|
|
func numberOfBands() -> Int {
|
|
equalizerService.bands.count
|
|
}
|
|
|
|
func band(at index: Int) -> EQBand? {
|
|
guard index < numberOfBands() else { return nil }
|
|
return bands[index]
|
|
}
|
|
}
|