@babylonjs/viewer/dist/chunks/webAudioBus-lW3wu8TI.esm.js

The Babylon Viewer aims to simplify a specific but common Babylon.js use case: loading, viewing, and interacting with a 3D model.

import { A as AbstractAudioBus } from './abstractAudioBus-BM-qVCSZ.esm.js';
import { _ as _HasSpatialAudioOptions, a as _StereoAudio, b as _SpatialWebAudio, c as _WebAudioBusAndSoundSubGraph } from './spatialWebAudio-BHkDY-w9.esm.js';
import './webAudioBaseSubGraph-BjGMAHX6.esm.js';
import './spatialWebAudioUpdaterComponent-jS7MKp73.esm.js';
import './index-MZPybX0H.esm.js';

/**
 * Abstract class for an audio bus that has spatial audio and stereo output capabilities.
 *
 * Instances of this class can be connected to other audio buses.
 *
 * Audio buses are created by the {@link CreateAudioBusAsync} function.
 */
class AudioBus extends AbstractAudioBus {
    constructor(name, engine, options) {
        super(name, engine);
        this._spatialAutoUpdate = true;
        this._spatialMinUpdateTime = 0;
        this._outBus = null;
        this._spatial = null;
        this._onOutBusDisposed = () => {
            this.outBus = this.engine.defaultMainBus;
        };
        if (typeof options.spatialAutoUpdate === "boolean") {
            this._spatialAutoUpdate = options.spatialAutoUpdate;
        }
        if (typeof options.spatialMinUpdateTime === "number") {
            this._spatialMinUpdateTime = options.spatialMinUpdateTime;
        }
    }
    /**
     * The output bus of the audio bus. Defaults to the audio engine's default main bus.
     */
    get outBus() {
        return this._outBus;
    }
    set outBus(outBus) {
        if (this._outBus === outBus) {
            return;
        }
        if (this._outBus) {
            this._outBus.onDisposeObservable.removeCallback(this._onOutBusDisposed);
            if (!this._disconnect(this._outBus)) {
                throw new Error("Disconnect failed");
            }
        }
        this._outBus = outBus;
        if (this._outBus) {
            this._outBus.onDisposeObservable.add(this._onOutBusDisposed);
            if (!this._connect(this._outBus)) {
                throw new Error("Connect failed");
            }
        }
    }
    /**
     * The spatial audio features.
     */
    get spatial() {
        if (this._spatial) {
            return this._spatial;
        }
        return this._initSpatialProperty();
    }
    /**
     * Releases associated resources.
     */
    dispose() {
        super.dispose();
        this._spatial?.dispose();
        this._spatial = null;
        if (this._outBus) {
            this._outBus.onDisposeObservable.removeCallback(this._onOutBusDisposed);
        }
        this._outBus = null;
    }
    _initSpatialProperty() {
        return (this._spatial = this._createSpatialProperty(this._spatialAutoUpdate, this._spatialMinUpdateTime));
    }
}

/** @internal */
class _WebAudioBus extends AudioBus {
    /** @internal */
    constructor(name, engine, options) {
        super(name, engine, options);
        this._stereo = null;
        this._subGraph = new _WebAudioBus._SubGraph(this);
    }
    /** @internal */
    async _initAsync(options) {
        if (options.outBus) {
            this.outBus = options.outBus;
        }
        else {
            await this.engine.isReadyPromise;
            this.outBus = this.engine.defaultMainBus;
        }
        await this._subGraph.initAsync(options);
        if (_HasSpatialAudioOptions(options)) {
            this._initSpatialProperty();
        }
        this.engine._addNode(this);
    }
    /** @internal */
    dispose() {
        super.dispose();
        this._stereo = null;
        this.engine._removeNode(this);
    }
    /** @internal */
    get _inNode() {
        return this._subGraph._inNode;
    }
    /** @internal */
    get _outNode() {
        return this._subGraph._outNode;
    }
    /** @internal */
    get stereo() {
        return this._stereo ?? (this._stereo = new _StereoAudio(this._subGraph));
    }
    /** @internal */
    getClassName() {
        return "_WebAudioBus";
    }
    _createSpatialProperty(autoUpdate, minUpdateTime) {
        return new _SpatialWebAudio(this._subGraph, autoUpdate, minUpdateTime);
    }
    _connect(node) {
        const connected = super._connect(node);
        if (!connected) {
            return false;
        }
        if (node._inNode) {
            this._outNode?.connect(node._inNode);
        }
        return true;
    }
    _disconnect(node) {
        const disconnected = super._disconnect(node);
        if (!disconnected) {
            return false;
        }
        if (node._inNode) {
            this._outNode?.disconnect(node._inNode);
        }
        return true;
    }
}
_WebAudioBus._SubGraph = class extends _WebAudioBusAndSoundSubGraph {
    get _downstreamNodes() {
        return this._owner._downstreamNodes ?? null;
    }
    get _upstreamNodes() {
        return this._owner._upstreamNodes ?? null;
    }
};

export { _WebAudioBus };
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