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base sound class sound and oscillator extend from
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,219 @@ | ||
| import type { TimeObject } from '@utils/create-time-object' | ||
| import type { Playable } from '@interfaces/playable' | ||
| import type { Connectable, Connection } from '@interfaces/connectable' | ||
| import type { ControlType, ParamController, RampType, RatioType } from '@controllers/base-param-controller' | ||
| import audioContextAwareTimeout from '@utils/timeout' | ||
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| export abstract class BaseSound implements Connectable, Playable { | ||
| protected _isPlaying = false | ||
| protected gainNode: GainNode | ||
| protected pannerNode: StereoPannerNode | ||
| protected setTimeout: (fn: () => void, delayMillis: number) => number | ||
| protected startedPlayingAt: number = 0 | ||
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| public connections: Connection[] = [] | ||
| public startOffset: number = 0 | ||
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| protected abstract controller: ParamController | ||
| protected abstract wireConnections(): void | ||
| protected abstract setup(): void | ||
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| public abstract audioSourceNode: OscillatorNode | AudioBufferSourceNode | ||
| public abstract duration: TimeObject | ||
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| constructor(protected audioContext: AudioContext, opts?: any) { | ||
| const gainNode = audioContext.createGain() | ||
| const pannerNode = audioContext.createStereoPanner() | ||
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| this.gainNode = gainNode | ||
| this.pannerNode = pannerNode | ||
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| if (opts?.setTimeout) { | ||
| this.setTimeout = opts.setTimeout | ||
| } | ||
| else { | ||
| this.setTimeout = audioContextAwareTimeout(audioContext).setTimeout | ||
| } | ||
| } | ||
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| public addConnection(connection: Connection): void { | ||
| this.connections.push(connection) | ||
| this.wireConnections() | ||
| } | ||
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| public removeConnection(name: string): void { | ||
| const connection = this.getConnection(name) | ||
| if (connection) { | ||
| const index = this.connections.indexOf(connection) | ||
| if (index > -1) { | ||
| this.connections.splice(index, 1) | ||
| this.wireConnections() | ||
| } | ||
| } | ||
| } | ||
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| // Allows you to get any user created connection in the connections array | ||
| public getConnection(name: string): Connection | undefined { | ||
| return this.connections.find(c => c.name === name) | ||
| } | ||
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| // Allows you to get node from any user created connection in the connections array | ||
| public getNodeFrom<T extends AudioNode | StereoPannerNode>(connectionName: string): T | undefined { | ||
| return this.getConnection(connectionName)?.audioNode as T | undefined | ||
| } | ||
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| public update(type: ControlType): { | ||
| to: (value: number) => { | ||
| from: (method: RatioType) => void | ||
| } | ||
| } { | ||
| return this.controller.update(type) | ||
| } | ||
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| public changePanTo(value: number): void { | ||
| this.controller.update('pan').to(value).from('ratio') | ||
| } | ||
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| public changeGainTo(value: number): { | ||
| from: (method: RatioType) => void | ||
| } { | ||
| return this.controller.update('gain').to(value) | ||
| } | ||
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| public onPlaySet(type: ControlType): { | ||
| to: (value: number) => { | ||
| at: (time: number) => void | ||
| endingAt: (time: number, rampType?: RampType) => void | ||
| } | ||
| } { | ||
| return this.controller.onPlaySet(type) | ||
| } | ||
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| public onPlayRamp(type: ControlType, rampType?: RampType): { | ||
| from: (startValue: number) => { | ||
| to: (endValue: number) => { | ||
| in: (endTime: number) => void | ||
| } | ||
| } | ||
| } { | ||
| return this.controller.onPlayRamp(type, rampType) | ||
| } | ||
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| public play(): void { | ||
| this.playAt(this.audioContext.currentTime) | ||
| } | ||
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| public playIn(when: number): void { | ||
| this.playAt(this.audioContext.currentTime + when) | ||
| } | ||
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| public playFor(duration: number): void { | ||
| this.playAt(this.audioContext.currentTime) | ||
| this.setTimeout(() => this.stop(), duration * 1000) | ||
| } | ||
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| /** | ||
| * Starts playing the audio source after `playIn` seconds have elapsed, then | ||
| * stops the audio source `stopAfter` seconds after it started playing. | ||
| * | ||
| * @public | ||
| * @method playInAndStopAfter | ||
| * | ||
| * @param {number} playIn Number of seconds from "now" that the audio source | ||
| * should play. | ||
| * | ||
| * @param {number} stopAfter Number of seconds from when the audio source | ||
| * started playing that the audio source should be stopped. | ||
| */ | ||
| public playInAndStopAfter(playIn: number, stopAfter: number): void { | ||
| this.playIn(playIn) | ||
| this.stopIn(playIn + stopAfter) | ||
| } | ||
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| /** | ||
| * The underlying method that backs all of the `play` methods. Plays the audio source at | ||
| * the specified moment in time. A "moment in time" is measured in seconds from the moment | ||
| * that the {{#crossLink "AudioContext"}}{{/crossLink}} was instantiated. | ||
| * | ||
| * @param {number} time The moment in time (in seconds, relative to the | ||
| * {{#crossLink "AudioContext"}}AudioContext's{{/crossLink}} "beginning of | ||
| * time") when the audio source should be played. | ||
| * | ||
| * @method playAt | ||
| */ | ||
| public async playAt(time: number): Promise<void> { | ||
| const { audioContext } = this | ||
| const { currentTime } = audioContext | ||
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| await audioContext.resume() | ||
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| this.setup() | ||
| this.audioSourceNode.start(time, this.startOffset) | ||
| this.startedPlayingAt = time | ||
| // schedule _isPlaying to false after duration | ||
| this.setTimeout(() => this._isPlaying = false, this.duration.pojo.seconds * 1000) | ||
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| if (time <= currentTime) { | ||
| this._isPlaying = true | ||
| } | ||
| else { | ||
| this.setTimeout(() => { | ||
| this._isPlaying = true | ||
| }, (time - currentTime) * 1000) | ||
| } | ||
| } | ||
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| /** | ||
| * Stops the audio source after specified seconds have elapsed. | ||
| * | ||
| * @public | ||
| * @method stopIn | ||
| * | ||
| * @param {number} seconds Number of seconds from "now" that the audio source | ||
| * should be stopped. | ||
| */ | ||
| public stopIn(seconds: number): void { | ||
| this.stopAt(this.audioContext.currentTime + seconds) | ||
| } | ||
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| /** | ||
| * The underlying method that backs all of the `stop` methods. Stops sound and | ||
| * set `isPlaying` to false at specified time. | ||
| * | ||
| * Functionally equivalent to the `stopAt` method. | ||
| * | ||
| * @method stopAt | ||
| * | ||
| * @param {number} stopAt The moment in time (in seconds, relative to the | ||
| * {{#crossLink "AudioContext"}}AudioContext's{{/crossLink}} "beginning of | ||
| * time") when the audio source should be stopped. | ||
| */ | ||
| public stopAt(stopAt: number): void { | ||
| const node = this.audioSourceNode | ||
| const currentTime = this.audioContext.currentTime | ||
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| if (node) { | ||
| node.stop(stopAt) | ||
| } | ||
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| if (stopAt === currentTime) { | ||
| this._isPlaying = false | ||
| } | ||
| else { | ||
| this.setTimeout(() => this._isPlaying = false, (stopAt - currentTime) * 1000) | ||
| } | ||
| } | ||
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| public stop(): void { | ||
| this.audioSourceNode.stop() | ||
| this._isPlaying = false | ||
| } | ||
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| public get isPlaying(): boolean { | ||
| return this._isPlaying | ||
| } | ||
|
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| public get percentGain(): number { | ||
| return this.controller.gain * 100 | ||
| } | ||
| } |
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