Beepody /
beepody
| Total Complexity | 2 |
| Total Lines | 39 |
| Duplicated Lines | 0 % |
| Coverage | 100% |
| Changes | 0 | ||
| 1 | // import {DEFAULT_LENGTH, DEFAULT_FREQUENCY} from './config' |
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| 2 | |||
| 3 | /** |
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| 4 | * @class Tone player |
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| 5 | * @name Tone |
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| 6 | */ |
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| 7 | 3 | export class Tone { |
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| 8 | ctx: AudioContext |
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| 9 | gainNode: GainNode |
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| 10 | outNode: AudioDestinationNode |
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| 11 | |||
| 12 | /** |
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| 13 | * Initialize a tone beeper. |
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| 14 | */ |
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| 15 | /* istanbul ignore next */ |
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| 16 | constructor() { |
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| 17 | if (typeof window !== 'undefined' && typeof window.AudioContext !== 'undefined') { |
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| 18 | this.ctx = new window.AudioContext() |
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| 19 | this.gainNode = this.ctx.createGain() |
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| 20 | this.gainNode.gain.value = 1/8 |
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| 21 | this.outNode = this.ctx.destination |
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| 22 | this.gainNode.connect(this.outNode) |
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| 23 | } |
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| 24 | else { |
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| 25 | throw 'AudioContext is required' |
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| 26 | } |
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| 27 | } |
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| 28 | |||
| 29 | /** |
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| 30 | * Play a beep after wait seconds, stopping after length seconds. |
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| 31 | */ |
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| 32 | /* istanbul ignore next */ |
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| 33 | beepOnBeepOff(frequency: number, length: number, wait: number): void { |
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| 34 | const osc = this.ctx.createOscillator() |
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| 35 | osc.type = 'square' |
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| 36 | osc.frequency.value = frequency |
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| 37 | osc.connect(this.gainNode) |
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| 38 | osc.start(wait) |
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| 39 | osc.stop(wait + length) |
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| 40 | } |
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| 45 |
