| 1 |
- {"ast":null,"code":"import { Observable } from \"../Misc/observable.js\";\nimport { Logger } from \"../Misc/logger.js\";\nimport { AbstractEngine } from \"../Engines/abstractEngine.js\";\nimport { IsWindowObjectExist } from \"../Misc/domManagement.js\";\n// Sets the default audio engine to Babylon.js\nAbstractEngine.AudioEngineFactory = (hostElement, audioContext, audioDestination) => {\n return new AudioEngine(hostElement, audioContext, audioDestination);\n};\n/**\n * This represents the default audio engine used in babylon.\n * It is responsible to play, synchronize and analyse sounds throughout the application.\n * @see https://doc.babylonjs.com/features/featuresDeepDive/audio/playingSoundsMusic\n */\nexport class AudioEngine {\n /**\n * Gets the current AudioContext if available.\n */\n get audioContext() {\n if (!this._audioContextInitialized) {\n this._initializeAudioContext();\n }\n return this._audioContext;\n }\n /**\n * Instantiates a new audio engine.\n *\n * There should be only one per page as some browsers restrict the number\n * of audio contexts you can create.\n * @param hostElement defines the host element where to display the mute icon if necessary\n * @param audioContext defines the audio context to be used by the audio engine\n * @param audioDestination defines the audio destination node to be used by audio engine\n */\n constructor(hostElement = null, audioContext = null, audioDestination = null) {\n this._audioContext = null;\n this._audioContextInitialized = false;\n this._muteButton = null;\n this._audioDestination = null;\n /**\n * Gets whether the current host supports Web Audio and thus could create AudioContexts.\n */\n this.canUseWebAudio = false;\n /**\n * Defines if Babylon should emit a warning if WebAudio is not supported.\n * @ignoreNaming\n */\n // eslint-disable-next-line @typescript-eslint/naming-convention\n this.WarnedWebAudioUnsupported = false;\n /**\n * Gets whether or not mp3 are supported by your browser.\n */\n this.isMP3supported = false;\n /**\n * Gets whether or not ogg are supported by your browser.\n */\n this.isOGGsupported = false;\n /**\n * Gets whether audio has been unlocked on the device.\n * Some Browsers have strong restrictions about Audio and won't autoplay unless\n * a user interaction has happened.\n */\n this.unlocked = false;\n /**\n * Defines if the audio engine relies on a custom unlocked button.\n * In this case, the embedded button will not be displayed.\n */\n this.useCustomUnlockedButton = false;\n /**\n * Event raised when audio has been unlocked on the browser.\n */\n this.onAudioUnlockedObservable = new Observable();\n /**\n * Event raised when audio has been locked on the browser.\n */\n this.onAudioLockedObservable = new Observable();\n this._tryToRun = false;\n this._onResize = () => {\n this._moveButtonToTopLeft();\n };\n if (!IsWindowObjectExist()) {\n return;\n }\n if (typeof window.AudioContext !== \"undefined\") {\n this.canUseWebAudio = true;\n }\n const audioElem = document.createElement(\"audio\");\n this._hostElement = hostElement;\n this._audioContext = audioContext;\n this._audioDestination = audioDestination;\n try {\n if (audioElem && !!audioElem.canPlayType && (audioElem.canPlayType('audio/mpeg; codecs=\"mp3\"').replace(/^no$/, \"\") || audioElem.canPlayType(\"audio/mp3\").replace(/^no$/, \"\"))) {\n this.isMP3supported = true;\n }\n } catch (e) {\n // protect error during capability check.\n }\n try {\n if (audioElem && !!audioElem.canPlayType && audioElem.canPlayType('audio/ogg; codecs=\"vorbis\"').replace(/^no$/, \"\")) {\n this.isOGGsupported = true;\n }\n } catch (e) {\n // protect error during capability check.\n }\n }\n /**\n * Flags the audio engine in Locked state.\n * This happens due to new browser policies preventing audio to autoplay.\n */\n lock() {\n this._triggerSuspendedState();\n }\n /**\n * Unlocks the audio engine once a user action has been done on the dom.\n * This is helpful to resume play once browser policies have been satisfied.\n */\n unlock() {\n var _this$_audioContext;\n if (((_this$_audioContext = this._audioContext) === null || _this$_audioContext === void 0 ? void 0 : _this$_audioContext.state) === \"running\") {\n this._hideMuteButton();\n if (!this.unlocked) {\n // Notify users that the audio stack is unlocked/unmuted\n this.unlocked = true;\n this.onAudioUnlockedObservable.notifyObservers(this);\n }\n return;\n }\n // On iOS, if the audio context resume request was sent from an event other than a `click` event, then\n // the resume promise will never resolve and the only way to get the audio context unstuck is to\n // suspend it and make another resume request.\n if (this._tryToRun) {\n var _this$_audioContext2;\n (_this$_audioContext2 = this._audioContext) === null || _this$_audioContext2 === void 0 || _this$_audioContext2.suspend().then(() => {\n this._tryToRun = false;\n this._triggerRunningState();\n });\n } else {\n this._triggerRunningState();\n }\n }\n /** @internal */\n _resumeAudioContextOnStateChange() {\n var _this$_audioContext3;\n (_this$_audioContext3 = this._audioContext) === null || _this$_audioContext3 === void 0 || _this$_audioContext3.addEventListener(\"statechange\", () => {\n var _this$_audioContext4;\n if (this.unlocked && ((_this$_audioContext4 = this._audioContext) === null || _this$_audioContext4 === void 0 ? void 0 : _this$_audioContext4.state) !== \"running\") {\n this._resumeAudioContext();\n }\n }, {\n once: true,\n passive: true,\n signal: AbortSignal.timeout(3000)\n });\n }\n _resumeAudioContext() {\n var _this$_audioContext5;\n if ((_this$_audioContext5 = this._audioContext) !== null && _this$_audioContext5 !== void 0 && _this$_audioContext5.resume) {\n return this._audioContext.resume();\n }\n return Promise.resolve();\n }\n _initializeAudioContext() {\n try {\n if (this.canUseWebAudio) {\n if (!this._audioContext) {\n this._audioContext = new AudioContext();\n }\n // create a global volume gain node\n this.masterGain = this._audioContext.createGain();\n this.masterGain.gain.value = 1;\n if (!this._audioDestination) {\n this._audioDestination = this._audioContext.destination;\n }\n this.masterGain.connect(this._audioDestination);\n this._audioContextInitialized = true;\n if (this._audioContext.state === \"running\") {\n // Do not wait for the promise to unlock.\n this._triggerRunningState();\n }\n }\n } catch (e) {\n this.canUseWebAudio = false;\n Logger.Error(\"Web Audio: \" + e.message);\n }\n }\n _triggerRunningState() {\n if (this._tryToRun) {\n return;\n }\n this._tryToRun = true;\n this._resumeAudioContext().then(() => {\n this._tryToRun = false;\n if (this._muteButton) {\n this._hideMuteButton();\n }\n // Notify users that the audio stack is unlocked/unmuted\n this.unlocked = true;\n this.onAudioUnlockedObservable.notifyObservers(this);\n }).catch(() => {\n this._tryToRun = false;\n this.unlocked = false;\n });\n }\n _triggerSuspendedState() {\n this.unlocked = false;\n this.onAudioLockedObservable.notifyObservers(this);\n this._displayMuteButton();\n }\n _displayMuteButton() {\n if (this.useCustomUnlockedButton || this._muteButton) {\n return;\n }\n this._muteButton = document.createElement(\"BUTTON\");\n this._muteButton.className = \"babylonUnmuteIcon\";\n this._muteButton.id = \"babylonUnmuteIconBtn\";\n this._muteButton.title = \"Unmute\";\n const imageUrl = !window.SVGSVGElement ? \"https://cdn.babylonjs.com/Assets/audio.png\" : \"data:image/svg+xml;charset=UTF-8,%3Csvg%20version%3D%221.1%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2239%22%20height%3D%2232%22%20viewBox%3D%220%200%2039%2032%22%3E%3Cpath%20fill%3D%22white%22%20d%3D%22M9.625%2018.938l-0.031%200.016h-4.953q-0.016%200-0.031-0.016v-12.453q0-0.016%200.031-0.016h4.953q0.031%200%200.031%200.016v12.453zM12.125%207.688l8.719-8.703v27.453l-8.719-8.719-0.016-0.047v-9.938zM23.359%207.875l1.406-1.406%204.219%204.203%204.203-4.203%201.422%201.406-4.219%204.219%204.219%204.203-1.484%201.359-4.141-4.156-4.219%204.219-1.406-1.422%204.219-4.203z%22%3E%3C%2Fpath%3E%3C%2Fsvg%3E\";\n const css = \".babylonUnmuteIcon { position: absolute; left: 20px; top: 20px; height: 40px; width: 60px; background-color: rgba(51,51,51,0.7); background-image: url(\" + imageUrl + \"); background-size: 80%; background-repeat:no-repeat; background-position: center; background-position-y: 4px; border: none; outline: none; transition: transform 0.125s ease-out; cursor: pointer; z-index: 9999; } .babylonUnmuteIcon:hover { transform: scale(1.05) } .babylonUnmuteIcon:active { background-color: rgba(51,51,51,1) }\";\n const style = document.createElement(\"style\");\n style.appendChild(document.createTextNode(css));\n document.getElementsByTagName(\"head\")[0].appendChild(style);\n document.body.appendChild(this._muteButton);\n this._moveButtonToTopLeft();\n this._muteButton.addEventListener(\"touchend\", () => {\n this._triggerRunningState();\n }, true);\n this._muteButton.addEventListener(\"click\", () => {\n this.unlock();\n }, true);\n window.addEventListener(\"resize\", this._onResize);\n }\n _moveButtonToTopLeft() {\n if (this._hostElement && this._muteButton) {\n this._muteButton.style.top = this._hostElement.offsetTop + 20 + \"px\";\n this._muteButton.style.left = this._hostElement.offsetLeft + 20 + \"px\";\n }\n }\n _hideMuteButton() {\n if (this._muteButton) {\n document.body.removeChild(this._muteButton);\n this._muteButton = null;\n }\n }\n /**\n * Destroy and release the resources associated with the audio context.\n */\n dispose() {\n if (this.canUseWebAudio && this._audioContextInitialized) {\n if (this._connectedAnalyser && this._audioContext) {\n this._connectedAnalyser.stopDebugCanvas();\n this._connectedAnalyser.dispose();\n this.masterGain.disconnect();\n this.masterGain.connect(this._audioContext.destination);\n this._connectedAnalyser = null;\n }\n this.masterGain.gain.value = 1;\n }\n this.WarnedWebAudioUnsupported = false;\n this._hideMuteButton();\n window.removeEventListener(\"resize\", this._onResize);\n this.onAudioUnlockedObservable.clear();\n this.onAudioLockedObservable.clear();\n }\n /**\n * Gets the global volume sets on the master gain.\n * @returns the global volume if set or -1 otherwise\n */\n getGlobalVolume() {\n if (this.canUseWebAudio && this._audioContextInitialized) {\n return this.masterGain.gain.value;\n } else {\n return -1;\n }\n }\n /**\n * Sets the global volume of your experience (sets on the master gain).\n * @param newVolume Defines the new global volume of the application\n */\n setGlobalVolume(newVolume) {\n if (this.canUseWebAudio && this._audioContextInitialized) {\n this.masterGain.gain.value = newVolume;\n }\n }\n /**\n * Connect the audio engine to an audio analyser allowing some amazing\n * synchronization between the sounds/music and your visualization (VuMeter for instance).\n * @see https://doc.babylonjs.com/features/featuresDeepDive/audio/playingSoundsMusic#using-the-analyser\n * @param analyser The analyser to connect to the engine\n */\n connectToAnalyser(analyser) {\n if (this._connectedAnalyser) {\n this._connectedAnalyser.stopDebugCanvas();\n }\n if (this.canUseWebAudio && this._audioContextInitialized && this._audioContext) {\n this._connectedAnalyser = analyser;\n this.masterGain.disconnect();\n this._connectedAnalyser.connectAudioNodes(this.masterGain, this._audioContext.destination);\n }\n }\n}","map":{"version":3,"names":["Observable","Logger","AbstractEngine","IsWindowObjectExist","AudioEngineFactory","hostElement","audioContext","audioDestination","AudioEngine","_audioContextInitialized","_initializeAudioContext","_audioContext","constructor","_muteButton","_audioDestination","canUseWebAudio","WarnedWebAudioUnsupported","isMP3supported","isOGGsupported","unlocked","useCustomUnlockedButton","onAudioUnlockedObservable","onAudioLockedObservable","_tryToRun","_onResize","_moveButtonToTopLeft","window","AudioContext","audioElem","document","createElement","_hostElement","canPlayType","replace","e","lock","_triggerSuspendedState","unlock","_this$_audioContext","state","_hideMuteButton","notifyObservers","_this$_audioContext2","suspend","then","_triggerRunningState","_resumeAudioContextOnStateChange","_this$_audioContext3","addEventListener","_this$_audioContext4","_resumeAudioContext","once","passive","signal","AbortSignal","timeout","_this$_audioContext5","resume","Promise","resolve","masterGain","createGain","gain","value","destination","connect","Error","message","catch","_displayMuteButton","className","id","title","imageUrl","SVGSVGElement","css","style","appendChild","createTextNode","getElementsByTagName","body","top","offsetTop","left","offsetLeft","removeChild","dispose","_connectedAnalyser","stopDebugCanvas","disconnect","removeEventListener","clear","getGlobalVolume","setGlobalVolume","newVolume","connectToAnalyser","analyser","connectAudioNodes"],"sources":["F:/workspace/202226701027/huinongbao-app/node_modules/@babylonjs/core/Audio/audioEngine.js"],"sourcesContent":["import { Observable } from \"../Misc/observable.js\";\nimport { Logger } from \"../Misc/logger.js\";\nimport { AbstractEngine } from \"../Engines/abstractEngine.js\";\nimport { IsWindowObjectExist } from \"../Misc/domManagement.js\";\n// Sets the default audio engine to Babylon.js\nAbstractEngine.AudioEngineFactory = (hostElement, audioContext, audioDestination) => {\n return new AudioEngine(hostElement, audioContext, audioDestination);\n};\n/**\n * This represents the default audio engine used in babylon.\n * It is responsible to play, synchronize and analyse sounds throughout the application.\n * @see https://doc.babylonjs.com/features/featuresDeepDive/audio/playingSoundsMusic\n */\nexport class AudioEngine {\n /**\n * Gets the current AudioContext if available.\n */\n get audioContext() {\n if (!this._audioContextInitialized) {\n this._initializeAudioContext();\n }\n return this._audioContext;\n }\n /**\n * Instantiates a new audio engine.\n *\n * There should be only one per page as some browsers restrict the number\n * of audio contexts you can create.\n * @param hostElement defines the host element where to display the mute icon if necessary\n * @param audioContext defines the audio context to be used by the audio engine\n * @param audioDestination defines the audio destination node to be used by audio engine\n */\n constructor(hostElement = null, audioContext = null, audioDestination = null) {\n this._audioContext = null;\n this._audioContextInitialized = false;\n this._muteButton = null;\n this._audioDestination = null;\n /**\n * Gets whether the current host supports Web Audio and thus could create AudioContexts.\n */\n this.canUseWebAudio = false;\n /**\n * Defines if Babylon should emit a warning if WebAudio is not supported.\n * @ignoreNaming\n */\n // eslint-disable-next-line @typescript-eslint/naming-convention\n this.WarnedWebAudioUnsupported = false;\n /**\n * Gets whether or not mp3 are supported by your browser.\n */\n this.isMP3supported = false;\n /**\n * Gets whether or not ogg are supported by your browser.\n */\n this.isOGGsupported = false;\n /**\n * Gets whether audio has been unlocked on the device.\n * Some Browsers have strong restrictions about Audio and won't autoplay unless\n * a user interaction has happened.\n */\n this.unlocked = false;\n /**\n * Defines if the audio engine relies on a custom unlocked button.\n * In this case, the embedded button will not be displayed.\n */\n this.useCustomUnlockedButton = false;\n /**\n * Event raised when audio has been unlocked on the browser.\n */\n this.onAudioUnlockedObservable = new Observable();\n /**\n * Event raised when audio has been locked on the browser.\n */\n this.onAudioLockedObservable = new Observable();\n this._tryToRun = false;\n this._onResize = () => {\n this._moveButtonToTopLeft();\n };\n if (!IsWindowObjectExist()) {\n return;\n }\n if (typeof window.AudioContext !== \"undefined\") {\n this.canUseWebAudio = true;\n }\n const audioElem = document.createElement(\"audio\");\n this._hostElement = hostElement;\n this._audioContext = audioContext;\n this._audioDestination = audioDestination;\n try {\n if (audioElem &&\n !!audioElem.canPlayType &&\n (audioElem.canPlayType('audio/mpeg; codecs=\"mp3\"').replace(/^no$/, \"\") || audioElem.canPlayType(\"audio/mp3\").replace(/^no$/, \"\"))) {\n this.isMP3supported = true;\n }\n }\n catch (e) {\n // protect error during capability check.\n }\n try {\n if (audioElem && !!audioElem.canPlayType && audioElem.canPlayType('audio/ogg; codecs=\"vorbis\"').replace(/^no$/, \"\")) {\n this.isOGGsupported = true;\n }\n }\n catch (e) {\n // protect error during capability check.\n }\n }\n /**\n * Flags the audio engine in Locked state.\n * This happens due to new browser policies preventing audio to autoplay.\n */\n lock() {\n this._triggerSuspendedState();\n }\n /**\n * Unlocks the audio engine once a user action has been done on the dom.\n * This is helpful to resume play once browser policies have been satisfied.\n */\n unlock() {\n if (this._audioContext?.state === \"running\") {\n this._hideMuteButton();\n if (!this.unlocked) {\n // Notify users that the audio stack is unlocked/unmuted\n this.unlocked = true;\n this.onAudioUnlockedObservable.notifyObservers(this);\n }\n return;\n }\n // On iOS, if the audio context resume request was sent from an event other than a `click` event, then\n // the resume promise will never resolve and the only way to get the audio context unstuck is to\n // suspend it and make another resume request.\n if (this._tryToRun) {\n this._audioContext?.suspend().then(() => {\n this._tryToRun = false;\n this._triggerRunningState();\n });\n }\n else {\n this._triggerRunningState();\n }\n }\n /** @internal */\n _resumeAudioContextOnStateChange() {\n this._audioContext?.addEventListener(\"statechange\", () => {\n if (this.unlocked && this._audioContext?.state !== \"running\") {\n this._resumeAudioContext();\n }\n }, {\n once: true,\n passive: true,\n signal: AbortSignal.timeout(3000),\n });\n }\n _resumeAudioContext() {\n if (this._audioContext?.resume) {\n return this._audioContext.resume();\n }\n return Promise.resolve();\n }\n _initializeAudioContext() {\n try {\n if (this.canUseWebAudio) {\n if (!this._audioContext) {\n this._audioContext = new AudioContext();\n }\n // create a global volume gain node\n this.masterGain = this._audioContext.createGain();\n this.masterGain.gain.value = 1;\n if (!this._audioDestination) {\n this._audioDestination = this._audioContext.destination;\n }\n this.masterGain.connect(this._audioDestination);\n this._audioContextInitialized = true;\n if (this._audioContext.state === \"running\") {\n // Do not wait for the promise to unlock.\n this._triggerRunningState();\n }\n }\n }\n catch (e) {\n this.canUseWebAudio = false;\n Logger.Error(\"Web Audio: \" + e.message);\n }\n }\n _triggerRunningState() {\n if (this._tryToRun) {\n return;\n }\n this._tryToRun = true;\n this._resumeAudioContext()\n .then(() => {\n this._tryToRun = false;\n if (this._muteButton) {\n this._hideMuteButton();\n }\n // Notify users that the audio stack is unlocked/unmuted\n this.unlocked = true;\n this.onAudioUnlockedObservable.notifyObservers(this);\n })\n .catch(() => {\n this._tryToRun = false;\n this.unlocked = false;\n });\n }\n _triggerSuspendedState() {\n this.unlocked = false;\n this.onAudioLockedObservable.notifyObservers(this);\n this._displayMuteButton();\n }\n _displayMuteButton() {\n if (this.useCustomUnlockedButton || this._muteButton) {\n return;\n }\n this._muteButton = document.createElement(\"BUTTON\");\n this._muteButton.className = \"babylonUnmuteIcon\";\n this._muteButton.id = \"babylonUnmuteIconBtn\";\n this._muteButton.title = \"Unmute\";\n const imageUrl = !window.SVGSVGElement\n ? \"https://cdn.babylonjs.com/Assets/audio.png\"\n : \"data:image/svg+xml;charset=UTF-8,%3Csvg%20version%3D%221.1%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2239%22%20height%3D%2232%22%20viewBox%3D%220%200%2039%2032%22%3E%3Cpath%20fill%3D%22white%22%20d%3D%22M9.625%2018.938l-0.031%200.016h-4.953q-0.016%200-0.031-0.016v-12.453q0-0.016%200.031-0.016h4.953q0.031%200%200.031%200.016v12.453zM12.125%207.688l8.719-8.703v27.453l-8.719-8.719-0.016-0.047v-9.938zM23.359%207.875l1.406-1.406%204.219%204.203%204.203-4.203%201.422%201.406-4.219%204.219%204.219%204.203-1.484%201.359-4.141-4.156-4.219%204.219-1.406-1.422%204.219-4.203z%22%3E%3C%2Fpath%3E%3C%2Fsvg%3E\";\n const css = \".babylonUnmuteIcon { position: absolute; left: 20px; top: 20px; height: 40px; width: 60px; background-color: rgba(51,51,51,0.7); background-image: url(\" +\n imageUrl +\n \"); background-size: 80%; background-repeat:no-repeat; background-position: center; background-position-y: 4px; border: none; outline: none; transition: transform 0.125s ease-out; cursor: pointer; z-index: 9999; } .babylonUnmuteIcon:hover { transform: scale(1.05) } .babylonUnmuteIcon:active { background-color: rgba(51,51,51,1) }\";\n const style = document.createElement(\"style\");\n style.appendChild(document.createTextNode(css));\n document.getElementsByTagName(\"head\")[0].appendChild(style);\n document.body.appendChild(this._muteButton);\n this._moveButtonToTopLeft();\n this._muteButton.addEventListener(\"touchend\", () => {\n this._triggerRunningState();\n }, true);\n this._muteButton.addEventListener(\"click\", () => {\n this.unlock();\n }, true);\n window.addEventListener(\"resize\", this._onResize);\n }\n _moveButtonToTopLeft() {\n if (this._hostElement && this._muteButton) {\n this._muteButton.style.top = this._hostElement.offsetTop + 20 + \"px\";\n this._muteButton.style.left = this._hostElement.offsetLeft + 20 + \"px\";\n }\n }\n _hideMuteButton() {\n if (this._muteButton) {\n document.body.removeChild(this._muteButton);\n this._muteButton = null;\n }\n }\n /**\n * Destroy and release the resources associated with the audio context.\n */\n dispose() {\n if (this.canUseWebAudio && this._audioContextInitialized) {\n if (this._connectedAnalyser && this._audioContext) {\n this._connectedAnalyser.stopDebugCanvas();\n this._connectedAnalyser.dispose();\n this.masterGain.disconnect();\n this.masterGain.connect(this._audioContext.destination);\n this._connectedAnalyser = null;\n }\n this.masterGain.gain.value = 1;\n }\n this.WarnedWebAudioUnsupported = false;\n this._hideMuteButton();\n window.removeEventListener(\"resize\", this._onResize);\n this.onAudioUnlockedObservable.clear();\n this.onAudioLockedObservable.clear();\n }\n /**\n * Gets the global volume sets on the master gain.\n * @returns the global volume if set or -1 otherwise\n */\n getGlobalVolume() {\n if (this.canUseWebAudio && this._audioContextInitialized) {\n return this.masterGain.gain.value;\n }\n else {\n return -1;\n }\n }\n /**\n * Sets the global volume of your experience (sets on the master gain).\n * @param newVolume Defines the new global volume of the application\n */\n setGlobalVolume(newVolume) {\n if (this.canUseWebAudio && this._audioContextInitialized) {\n this.masterGain.gain.value = newVolume;\n }\n }\n /**\n * Connect the audio engine to an audio analyser allowing some amazing\n * synchronization between the sounds/music and your visualization (VuMeter for instance).\n * @see https://doc.babylonjs.com/features/featuresDeepDive/audio/playingSoundsMusic#using-the-analyser\n * @param analyser The analyser to connect to the engine\n */\n connectToAnalyser(analyser) {\n if (this._connectedAnalyser) {\n this._connectedAnalyser.stopDebugCanvas();\n }\n if (this.canUseWebAudio && this._audioContextInitialized && this._audioContext) {\n this._connectedAnalyser = analyser;\n this.masterGain.disconnect();\n this._connectedAnalyser.connectAudioNodes(this.masterGain, this._audioContext.destination);\n }\n 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