AudioKitEX/Tests/AudioKitEXTests/FaderTests.swift at 3b529f6febd10954f0c8d0aa75b72e377fcb0643 · jcavar/AudioKitEX · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
// Copyright AudioKit. All Rights Reserved. Revision History at http://github.com/AudioKit/AudioKit/

import AudioKit
import AudioKitEX
import XCTest

class FaderTests: XCTestCase {

    override func setUp() {
        super.setUp()
        Settings.sampleRate = 44100
    }

    func testDefault() {
        let engine = AudioEngine()
        let url = Bundle.module.url(forResource: "12345", withExtension: "wav", subdirectory: "TestResources")!
        let player = AudioPlayer(url: url)!
        engine.output = Fader(player, gain: 1.0)
        let audio = engine.startTest(totalDuration: 1.0)
        player.play()
        audio.append(engine.render(duration: 1.0))
        testMD5(audio)
    }

    func testGain() {
        let engine = AudioEngine()
        let url = Bundle.module.url(forResource: "12345", withExtension: "wav", subdirectory: "TestResources")!
        let player = AudioPlayer(url: url)!
        engine.output = Fader(player, gain: 0.5)
        let audio = engine.startTest(totalDuration: 1.0)
        player.play()
        audio.append(engine.render(duration: 1.0))
        testMD5(audio)
    }

    func testBypass() {
        let engine = AudioEngine()
        let url = Bundle.module.url(forResource: "12345", withExtension: "wav", subdirectory: "TestResources")!
        let player = AudioPlayer(url: url)!
        let fader = Fader(player, gain: 2.0)
        fader.bypass()
        engine.output = fader
        let audio = engine.startTest(totalDuration: 1.0)
        player.play()
        audio.append(engine.render(duration: 1.0))
        testMD5(audio)
    }

    func testMany() {
        let engine = AudioEngine()
        let url = Bundle.module.url(forResource: "12345", withExtension: "wav", subdirectory: "TestResources")!
        let player = AudioPlayer(url: url)!
        let initialFader = Fader(player, gain: 1.0)
        var nextFader = initialFader
        for _ in 0 ..< 200 {
            let fader = Fader(nextFader, gain: 1.0)
            nextFader = fader
        }
        engine.output = nextFader
        let audio = engine.startTest(totalDuration: 1.0)
        player.play()
        audio.append(engine.render(duration: 1.0))
        testMD5(audio)
    }

    /*

    func testFlipStereo() {
        let engine = AudioEngine()
        let url = Bundle.module.url(forResource: "12345", withExtension: "wav", subdirectory: "TestResources")!
        let player = AudioPlayer(url: url)!
        let pan = Panner(player, pan: 1.0)
        let fader = Fader(pan, gain: 1.0)
        fader.flipStereo = true
        engine.output = fader
        let audio = engine.startTest(totalDuration: 1.0)
        player.play()
        audio.append(engine.render(duration: 1.0))
        testMD5(audio)
    }


    func testFlipStereoTwice() {
        let engine = AudioEngine()
        let url = Bundle.module.url(forResource: "12345", withExtension: "wav", subdirectory: "TestResources")!
        let player = AudioPlayer(url: url)!
        let pan = Panner(player, pan: 1.0)
        let fader = Fader(pan, gain: 1.0)
        fader.flipStereo = true
        let fader2 = Fader(fader, gain: 1.0)
        fader2.flipStereo = true
        engine.output = fader2
        let audio = engine.startTest(totalDuration: 1.0)
        player.play()
        audio.append(engine.render(duration: 1.0))
        testMD5(audio)
    }

    func testFlipStereoThrice() {
        let engine = AudioEngine()
        let url = Bundle.module.url(forResource: "12345", withExtension: "wav", subdirectory: "TestResources")!
        let player = AudioPlayer(url: url)!
        let pan = Panner(player, pan: 1.0)
        let fader = Fader(pan, gain: 1.0)
        fader.flipStereo = true
        let fader2 = Fader(fader, gain: 1.0)
        fader2.flipStereo = true
        let fader3 = Fader(fader2, gain: 1.0)
        fader3.flipStereo = true
        engine.output = fader3
        let audio = engine.startTest(totalDuration: 1.0)
        player.play()
        audio.append(engine.render(duration: 1.0))
        testMD5(audio)
    }

    func testMixToMono() {
        let engine = AudioEngine()
        let url = Bundle.module.url(forResource: "12345", withExtension: "wav", subdirectory: "TestResources")!
        let player = AudioPlayer(url: url)!
        let pan = Panner(player, pan: 1.0)
        let fader = Fader(pan, gain: 1.0)
        fader.mixToMono = true
        engine.output = fader
        let audio = engine.startTest(totalDuration: 1.0)
        player.play()
        audio.append(engine.render(duration: 1.0))
        testMD5(audio)
    }
*/

    func testParameters() {
        let engine = AudioEngine()
        let url = Bundle.module.url(forResource: "12345", withExtension: "wav", subdirectory: "TestResources")!
        let player = AudioPlayer(url: url)!
        engine.output = Fader(player, gain: 2.0)
        let audio = engine.startTest(totalDuration: 1.0)
        player.play()
        audio.append(engine.render(duration: 1.0))
        testMD5(audio)
    }

    func testParameters2() {
        let engine = AudioEngine()
        let url = Bundle.module.url(forResource: "12345", withExtension: "wav", subdirectory: "TestResources")!
        let player = AudioPlayer(url: url)!
        engine.output = Fader(player, gain: 0.5)
        let audio = engine.startTest(totalDuration: 1.0)
        player.play()
        audio.append(engine.render(duration: 1.0))
        testMD5(audio)
    }

    func testRealtimeRamp() {
        let engine = AudioEngine()
        let url = Bundle.module.url(forResource: "12345", withExtension: "wav", subdirectory: "TestResources")!
        let player = AudioPlayer(url: url)!
        let fader = Fader(player)

        engine.output = fader

        try? engine.start()

        fader.start()
        player.play()

        fader.$leftGain.ramp(from: 0, to: 1, duration: Float(player.duration))
        fader.$rightGain.ramp(from: 0, to: 1, duration: Float(player.duration))

        wait(for: player.duration + 0.5)

    }

    // for waiting in the background for realtime testing
    func wait(for interval: TimeInterval) {
        let delayExpectation = XCTestExpectation(description: "delayExpectation")
        DispatchQueue.main.asyncAfter(deadline: .now() + interval) {
            delayExpectation.fulfill()
        }
        wait(for: [delayExpectation], timeout: interval + 1)
    }
}