@babylonjs/viewer/dist/chunks/webAudioStreamingSound-G95NHMdc.esm.min.js

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

import{O as e,aY as t,bI as s,y as i}from"./index-BPURObVq.esm.min.js";import{A as n,_ as o}from"./abstractSoundInstance-CT5dRXOE.esm.min.js";import{_ as a,a as r,b as h,c as d}from"./spatialWebAudio-Cxs0XdBX.esm.min.js";import{_,a as l}from"./spatialWebAudioUpdaterComponent-LOlF6N8J.esm.min.js";import"./abstractSoundSource-C5k4Xume.esm.min.js";import"./webAudioBaseSubGraph-Ww7puCo8.esm.min.js";class u extends n{constructor(e,t,s){super(e,t,s),this._preloadedInstances=new Array}get preloadCount(){return this._options.preloadCount??1}get preloadCompletedCount(){return this._preloadedInstances.length}preloadInstanceAsync(){const e=this._createInstance();return this._addPreloadedInstance(e),e.preloadedPromise}async preloadInstancesAsync(e){for(let t=0;t<e;t++)this.preloadInstanceAsync();await Promise.all(this._preloadedInstances.map(async e=>await e.preloadedPromise))}play(e={}){if(5===this.state)return void this.resume(e);let t;this.preloadCompletedCount>0?(t=this._preloadedInstances[0],t.startOffset=this.startOffset,this._removePreloadedInstance(t)):t=this._createInstance();const s=()=>{3===t.state&&(this._stopExcessInstances(),t.onStateChangedObservable.removeCallback(s))};t.onStateChangedObservable.add(s),e.startOffset??=this.startOffset,e.loop??=this.loop,e.volume??=1,this._beforePlay(t),t.play(e),this._afterPlay(t)}resume(e){super.resume(e)}stop(){if(this._setState(1),this._instances)for(const e of Array.from(this._instances))e.stop()}_addPreloadedInstance(e){this._preloadedInstances.includes(e)||this._preloadedInstances.push(e)}_removePreloadedInstance(e){const t=this._preloadedInstances.indexOf(e);-1!==t&&this._preloadedInstances.splice(t,1)}}class c extends o{constructor(t){super(t),this.onReadyObservable=new e,this.preloadedPromise=new Promise((e,t)=>{this._rejectPreloadedPromise=t,this._resolvePreloadedPromise=e}),this.onErrorObservable.add(this._rejectPreloadedPromise),this.onReadyObservable.add(this._resolvePreloadedPromise)}set startOffset(e){this._options.startOffset=e}dispose(){super.dispose(),this.onErrorObservable.clear(),this.onReadyObservable.clear(),this._resolvePreloadedPromise()}}class m extends u{constructor(e,t,s){super(e,t,s),this._stereo=null,this._options={autoplay:s.autoplay??!1,loop:s.loop??!1,maxInstances:s.maxInstances??1/0,preloadCount:s.preloadCount??1,startOffset:s.startOffset??0},this._subGraph=new m._SubGraph(this)}async _initAsync(e,t){const s=this.engine._audioContext;if(!(s instanceof AudioContext))throw new Error("Unsupported audio context type.");this._audioContext=s,this._source=e,t.outBus?this.outBus=t.outBus:!1!==t.outBusAutoDefault&&(await this.engine.isReadyPromise,this.outBus=this.engine.defaultMainBus),await this._subGraph.initAsync(t),a(t)&&this._initSpatialProperty(),this.preloadCount&&await this.preloadInstancesAsync(this.preloadCount),t.autoplay&&this.play(t),this.engine._addSound(this)}get _inNode(){return this._subGraph._inNode}get _outNode(){return this._subGraph._outNode}get stereo(){return this._stereo??(this._stereo=new r(this._subGraph))}dispose(){super.dispose(),this._stereo=null,this._subGraph.dispose(),this.engine._removeSound(this)}getClassName(){return"_WebAudioStreamingSound"}_createInstance(){return new p(this,this._options)}_connect(e){return!!super._connect(e)&&(e._inNode&&this._outNode?.connect(e._inNode),!0)}_disconnect(e){return!!super._disconnect(e)&&(e._inNode&&this._outNode?.disconnect(e._inNode),!0)}_createSpatialProperty(e,t){return new h(this._subGraph,e,t)}_getOptions(){return this._options}}m._SubGraph=class extends d{get _downstreamNodes(){return this._owner._downstreamNodes??null}get _upstreamNodes(){return this._owner._upstreamNodes??null}};class p extends c{constructor(e,t){if(super(e),this._currentTimeChangedWhilePaused=!1,this._enginePlayTime=1/0,this._enginePauseTime=0,this._isReady=!1,this._isReadyPromise=new Promise((e,t)=>{this._resolveIsReadyPromise=e,this._rejectIsReadyPromise=t}),this._onCanPlayThrough=()=>{this._isReady=!0,this._resolveIsReadyPromise(this._mediaElement),this.onReadyObservable.notifyObservers(this)},this._onEnded=()=>{this._setState(1)},this._onError=e=>{this._setState(4),this.onErrorObservable.notifyObservers(e),this._rejectIsReadyPromise(e),this.dispose()},this._onEngineStateChanged=()=>{"running"===this.engine.state&&(this._options.loop&&2===this.state&&this.play(),this.engine.stateChangedObservable.removeCallback(this._onEngineStateChanged))},this._onUserGesture=()=>{this.play()},this._options=t,this._volumeNode=new GainNode(e._audioContext),"string"==typeof e._source)this._initFromUrl(e._source);else if(Array.isArray(e._source))this._initFromUrls(e._source);else{if(!(e._source instanceof HTMLMediaElement))throw new Error(`Invalid streaming sound source (${e._source}).`);this._initFromMediaElement(e._source)}}get currentTime(){if(1===this._state)return 0;const e=5===this._state?0:this.engine.currentTime-this._enginePlayTime;return this._enginePauseTime+e+this._options.startOffset}set currentTime(e){const t=2===this._state||3===this._state;t&&(this._mediaElement.pause(),this._state=1),this._enginePauseTime=0,this._options.startOffset=e,t?this.play({startOffset:e}):5===this._state&&(this._currentTimeChangedWhilePaused=!0)}get _outNode(){return this._volumeNode}set loop(e){this._options.loop=e,this._mediaElement.loop=e}get startTime(){return 1===this._state?0:this._enginePlayTime}dispose(){super.dispose(),this.stop(),this._sourceNode?.disconnect(this._volumeNode),this._sourceNode=null,this._mediaElement.removeEventListener("error",this._onError),this._mediaElement.removeEventListener("ended",this._onEnded),this._mediaElement.removeEventListener("canplaythrough",this._onCanPlayThrough);for(const e of Array.from(this._mediaElement.children))this._mediaElement.removeChild(e);this.engine.stateChangedObservable.removeCallback(this._onEngineStateChanged),this.engine.userGestureObservable.removeCallback(this._onUserGesture)}play(e={}){if(3===this._state)return;void 0!==e.loop&&(this._options.loop=e.loop),this._mediaElement.loop=this._options.loop;let t=e.startOffset;this._currentTimeChangedWhilePaused?(t=this._options.startOffset,this._currentTimeChangedWhilePaused=!1):5===this._state&&(t=this.currentTime),t&&t>0&&(this._mediaElement.currentTime=t),void 0!==e.volume&&(this._volumeNode.gain.value=e.volume),this._play()}pause(){2!==this._state&&3!==this._state||(this._setState(5),this._enginePauseTime+=this.engine.currentTime-this._enginePlayTime,this._mediaElement.pause())}resume(e={}){(5===this._state||this._currentTimeChangedWhilePaused)&&this.play(e)}stop(){1!==this._state&&this._stop()}getClassName(){return"_WebAudioStreamingSoundInstance"}_connect(e){return!!super._connect(e)&&(e instanceof m&&e._inNode&&this._outNode?.connect(e._inNode),!0)}_disconnect(e){return!!super._disconnect(e)&&(e instanceof m&&e._inNode&&this._outNode?.disconnect(e._inNode),!0)}_initFromMediaElement(e){if(t.SetCorsBehavior(e.currentSrc,e),e.controls=!1,e.loop=this._options.loop,e.preload="auto",e.addEventListener("canplaythrough",this._onCanPlayThrough,{once:!0}),e.addEventListener("ended",this._onEnded,{once:!0}),e.addEventListener("error",this._onError,{once:!0}),e.load(),this._sourceNode=new MediaElementAudioSourceNode(this._sound._audioContext,{mediaElement:e}),this._sourceNode.connect(this._volumeNode),!this._connect(this._sound))throw new Error("Connect failed");this._mediaElement=e}_initFromUrl(e){const t=s.IsCustomRequestAvailable?_(l(e)):l(e),i=new Audio(t);this._initFromMediaElement(i)}_initFromUrls(e){const t=new Audio;for(const i of e){const e=document.createElement("source");e.src=s.IsCustomRequestAvailable?_(l(i)):l(i),t.appendChild(e)}this._initFromMediaElement(t)}_play(){if(this._setState(2),this._isReady){if(2===this._state)if("running"===this.engine.state){const e=this._mediaElement.play();this._enginePlayTime=this.engine.currentTime,this._setState(3),e.catch(()=>{this._setState(4),this._options.loop&&this.engine.userGestureObservable.addOnce(this._onUserGesture)})}else this._options.loop?this.engine.stateChangedObservable.add(this._onEngineStateChanged):(this.stop(),this._setState(4))}else this._playWhenReady()}_playWhenReady(){this._isReadyPromise.then(()=>{this._play()}).catch(()=>{i.Error("Streaming sound instance failed to play"),this._setState(4)})}_stop(){this._mediaElement.pause(),this._onEnded(),this.engine.stateChangedObservable.removeCallback(this._onEngineStateChanged)}}export{m as _WebAudioStreamingSound};
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