wavesurfer.js/dist/wavesurfer.min.js

Interactive navigable audio visualization using Web Audio and Canvas

/*!
 * wavesurfer.js 4.3.0 (2020-12-13)
 * https://wavesurfer-js.org
 * @license BSD-3-Clause
 */
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element")},this.mediaListeners.canplay=function(){e.fireEvent("canplay")},this.mediaListeners.ended=function(){e.fireEvent("finish")},this.mediaListeners.play=function(){e.fireEvent("play")},this.mediaListeners.pause=function(){e.fireEvent("pause")},this.mediaListeners.seeked=function(t){e.fireEvent("seek")},this.mediaListeners.volumechange=function(t){e.isMuted=e.media.muted,e.isMuted?e.volume=0:e.volume=e.media.volume,e.fireEvent("volume")},Object.keys(this.mediaListeners).forEach((function(t){e.media.removeEventListener(t,e.mediaListeners[t]),e.media.addEventListener(t,e.mediaListeners[t])}))}},{key:"createTimer",value:function(){var e=this;this.on("play",(function t(){e.isPaused()||(e.fireEvent("audioprocess",e.getCurrentTime()),s.frame(t)())})),this.on("pause",(function(){e.fireEvent("audioprocess",e.getCurrentTime())}))}},{key:"load",value:function(e,t,n,r){var i=document.createElement(this.mediaType);i.controls=this.params.mediaControls,i.autoplay=this.params.autoplay||!1,i.preload=null==r?"auto":r,i.src=e,i.style.width="100%";var a=t.querySelector(this.mediaType);a&&t.removeChild(a),t.appendChild(i),this._load(i,n,r)}},{key:"loadElt",value:function(e,t){e.controls=this.params.mediaControls,e.autoplay=this.params.autoplay||!1,this._load(e,t,e.preload)}},{key:"_load",value:function(e,t,n){if(!(e instanceof HTMLMediaElement)||void 0===e.addEventListener)throw new Error("media parameter is not a valid media element");"function"!=typeof e.load||t&&"none"==n||e.load(),this.media=e,this._setupMediaListeners(),this.peaks=t,this.onPlayEnd=null,this.buffer=null,this.isMuted=e.muted,this.setPlaybackRate(this.playbackRate),this.setVolume(this.volume)}},{key:"isPaused",value:function(){return!this.media||this.media.paused}},{key:"getDuration",value:function(){if(this.explicitDuration)return this.explicitDuration;var e=(this.buffer||this.media).duration;return e>=1/0&&(e=this.media.seekable.end(0)),e}},{key:"getCurrentTime",value:function(){return this.media&&this.media.currentTime}},{key:"getPlayedPercents",value:function(){return this.getCurrentTime()/this.getDuration()||0}},{key:"getPlaybackRate",value:function(){return this.playbackRate||this.media.playbackRate}},{key:"setPlaybackRate",value:function(e){this.playbackRate=e||1,this.media.playbackRate=this.playbackRate}},{key:"seekTo",value:function(e){null!=e&&(this.media.currentTime=e),this.clearPlayEnd()}},{key:"play",value:function(e,t){this.seekTo(e);var n=this.media.play();return t&&this.setPlayEnd(t),n}},{key:"pause",value:function(){var e;return this.media&&(e=this.media.pause()),this.clearPlayEnd(),e}},{key:"setPlayEnd",value:function(e){var t=this;this.clearPlayEnd(),this._onPlayEnd=function(n){n>=e&&(t.pause(),t.seekTo(e))},this.on("audioprocess",this._onPlayEnd)}},{key:"clearPlayEnd",value:function(){this._onPlayEnd&&(this.un("audioprocess",this._onPlayEnd),this._onPlayEnd=null)}},{key:"getPeaks",value:function(e,t,n){return this.buffer?l(d(a.prototype),"getPeaks",this).call(this,e,t,n):this.peaks||[]}},{key:"setSinkId",value:function(e){return e?this.media.setSinkId?this.media.setSinkId(e):Promise.reject(new Error("setSinkId is not supported in your browser")):Promise.reject(new Error("Invalid deviceId: "+e))}},{key:"getVolume",value:function(){return this.volume}},{key:"setVolume",value:function(e){this.volume=e,this.media.volume!==this.volume&&(this.media.volume=this.volume)}},{key:"setMute",value:function(e){this.isMuted=this.media.muted=e}},{key:"destroy",value:function(){var e=this;this.pause(),this.unAll(),this.destroyed=!0,Object.keys(this.mediaListeners).forEach((function(t){e.media&&e.media.removeEventListener(t,e.mediaListeners[t])})),this.params.removeMediaElementOnDestroy&&this.media&&this.media.parentNode&&this.media.parentNode.removeChild(this.media),this.media=null}}])&&u(t.prototype,n),r&&u(t,r),a}(a.default);t.default=p,e.exports=t.default},function(e,t,n){"use strict";function r(e){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}Object.defineProperty(t,"__esModule",{value:!0}),t.default=void 0;var i=function(e){if(e&&e.__esModule)return e;if(null===e||"object"!==r(e)&&"function"!=typeof e)return{default:e};var t=f();if(t&&t.has(e))return t.get(e);var n={},i=Object.defineProperty&&Object.getOwnPropertyDescriptor;for(var a in e)if(Object.prototype.hasOwnProperty.call(e,a)){var 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r;if(m(this,n),(r=t.call(this)).defaultParams={audioContext:null,audioScriptProcessor:null,audioRate:1,autoCenter:!0,autoCenterRate:5,autoCenterImmediately:!1,backend:"WebAudio",backgroundColor:null,barHeight:1,barRadius:0,barGap:null,barMinHeight:null,container:null,cursorColor:"#333",cursorWidth:1,dragSelection:!0,drawingContextAttributes:{desynchronized:!1},duration:null,fillParent:!0,forceDecode:!1,height:128,hideScrollbar:!1,interact:!0,loopSelection:!0,maxCanvasWidth:4e3,mediaContainer:null,mediaControls:!1,mediaType:"audio",minPxPerSec:20,normalize:!1,partialRender:!1,pixelRatio:window.devicePixelRatio||screen.deviceXDPI/screen.logicalXDPI,plugins:[],progressColor:"#555",removeMediaElementOnDestroy:!0,renderer:a.default,responsive:!1,rtl:!1,scrollParent:!1,skipLength:2,splitChannels:!1,splitChannelsOptions:{overlay:!1,channelColors:{},filterChannels:[],relativeNormalization:!1},waveColor:"#999",xhr:{}},r.backends={MediaElement:o.default,WebAudio:s.default,MediaElementWebAudio:l.default},r.util=i,r.params=Object.assign({},r.defaultParams,e),r.params.splitChannelsOptions=Object.assign({},r.defaultParams.splitChannelsOptions,e.splitChannelsOptions),r.container="string"==typeof e.container?document.querySelector(r.params.container):r.params.container,!r.container)throw new Error("Container element not found");if(null==r.params.mediaContainer?r.mediaContainer=r.container:"string"==typeof r.params.mediaContainer?r.mediaContainer=document.querySelector(r.params.mediaContainer):r.mediaContainer=r.params.mediaContainer,!r.mediaContainer)throw new Error("Media Container element not found");if(r.params.maxCanvasWidth<=1)throw new Error("maxCanvasWidth must be greater than 1");if(r.params.maxCanvasWidth%2==1)throw new Error("maxCanvasWidth must be an even number");if(!0===r.params.rtl&&i.style(r.container,{transform:"rotateY(180deg)"}),r.params.backgroundColor&&r.setBackgroundColor(r.params.backgroundColor),r.savedVolume=0,r.isMuted=!1,r.tmpEvents=[],r.currentRequest=null,r.arraybuffer=null,r.drawer=null,r.backend=null,r.peakCache=null,"function"!=typeof r.params.renderer)throw new Error("Renderer parameter is invalid");r.Drawer=r.params.renderer,"AudioElement"==r.params.backend&&(r.params.backend="MediaElement"),"WebAudio"!=r.params.backend&&"MediaElementWebAudio"!==r.params.backend||s.default.prototype.supportsWebAudio.call(null)||(r.params.backend="MediaElement"),r.Backend=r.backends[r.params.backend],r.initialisedPluginList={},r.isDestroyed=!1,r.isReady=!1;var u=0;return r._onResize=i.debounce((function(){u==r.drawer.wrapper.clientWidth||r.params.scrollParent||(u=r.drawer.wrapper.clientWidth,r.drawer.fireEvent("redraw"))}),"number"==typeof r.params.responsive?r.params.responsive:100),p(r,v(r))}return g(n,null,[{key:"create",value:function(e){return new n(e).init()}}]),g(n,[{key:"init",value:function(){return this.registerPlugins(this.params.plugins),this.createDrawer(),this.createBackend(),this.createPeakCache(),this}},{key:"registerPlugins",value:function(e){var t=this;return e.forEach((function(e){return t.addPlugin(e)})),e.forEach((function(e){e.deferInit||t.initPlugin(e.name)})),this.fireEvent("plugins-registered",e),this}},{key:"getActivePlugins",value:function(){return this.initialisedPluginList}},{key:"addPlugin",value:function(e){var t=this;if(!e.name)throw new Error("Plugin does not have a name!");if(!e.instance)throw new Error("Plugin ".concat(e.name," does not have an instance property!"));e.staticProps&&Object.keys(e.staticProps).forEach((function(n){t[n]=e.staticProps[n]}));var n=e.instance;return Object.getOwnPropertyNames(i.Observer.prototype).forEach((function(e){n.prototype[e]=i.Observer.prototype[e]})),this[e.name]=new n(e.params||{},this),this.fireEvent("plugin-added",e.name),this}},{key:"initPlugin",value:function(e){if(!this[e])throw new Error("Plugin ".concat(e," has not been added yet!"));return this.initialisedPluginList[e]&&this.destroyPlugin(e),this[e].init(),this.initialisedPluginList[e]=!0,this.fireEvent("plugin-initialised",e),this}},{key:"destroyPlugin",value:function(e){if(!this[e])throw new Error("Plugin ".concat(e," has not been added yet and cannot be destroyed!"));if(!this.initialisedPluginList[e])throw new Error("Plugin ".concat(e," is not active and cannot be destroyed!"));if("function"!=typeof this[e].destroy)throw new Error("Plugin ".concat(e," does not have a destroy function!"));return this[e].destroy(),delete this.initialisedPluginList[e],this.fireEvent("plugin-destroyed",e),this}},{key:"destroyAllPlugins",value:function(){var e=this;Object.keys(this.initialisedPluginList).forEach((function(t){return e.destroyPlugin(t)}))}},{key:"createDrawer",value:function(){var e=this;this.drawer=new this.Drawer(this.container,this.params),this.drawer.init(),this.fireEvent("drawer-created",this.drawer),!1!==this.params.responsive&&(window.addEventListener("resize",this._onResize,!0),window.addEventListener("orientationchange",this._onResize,!0)),this.drawer.on("redraw",(function(){e.drawBuffer(),e.drawer.progress(e.backend.getPlayedPercents())})),this.drawer.on("click",(function(t,n){setTimeout((function(){return e.seekTo(n)}),0)})),this.drawer.on("scroll",(function(t){e.params.partialRender&&e.drawBuffer(),e.fireEvent("scroll",t)}))}},{key:"createBackend",value:function(){var e=this;this.backend&&this.backend.destroy(),this.backend=new this.Backend(this.params),this.backend.init(),this.fireEvent("backend-created",this.backend),this.backend.on("finish",(function(){e.drawer.progress(e.backend.getPlayedPercents()),e.fireEvent("finish")})),this.backend.on("play",(function(){return e.fireEvent("play")})),this.backend.on("pause",(function(){return e.fireEvent("pause")})),this.backend.on("audioprocess",(function(t){e.drawer.progress(e.backend.getPlayedPercents()),e.fireEvent("audioprocess",t)})),"MediaElement"!==this.params.backend&&"MediaElementWebAudio"!==this.params.backend||(this.backend.on("seek",(function(){e.drawer.progress(e.backend.getPlayedPercents())})),this.backend.on("volume",(function(){var t=e.getVolume();e.fireEvent("volume",t),e.backend.isMuted!==e.isMuted&&(e.isMuted=e.backend.isMuted,e.fireEvent("mute",e.isMuted))})))}},{key:"createPeakCache",value:function(){this.params.partialRender&&(this.peakCache=new u.default)}},{key:"getDuration",value:function(){return this.backend.getDuration()}},{key:"getCurrentTime",value:function(){return this.backend.getCurrentTime()}},{key:"setCurrentTime",value:function(e){e>=this.getDuration()?this.seekTo(1):this.seekTo(e/this.getDuration())}},{key:"play",value:function(e,t){var n=this;return this.fireEvent("interaction",(function(){return n.play(e,t)})),this.backend.play(e,t)}},{key:"setPlayEnd",value:function(e){this.backend.setPlayEnd(e)}},{key:"pause",value:function(){if(!this.backend.isPaused())return this.backend.pause()}},{key:"playPause",value:function(){return this.backend.isPaused()?this.play():this.pause()}},{key:"isPlaying",value:function(){return!this.backend.isPaused()}},{key:"skipBackward",value:function(e){this.skip(-e||-this.params.skipLength)}},{key:"skipForward",value:function(e){this.skip(e||this.params.skipLength)}},{key:"skip",value:function(e){var t=this.getDuration()||1,n=this.getCurrentTime()||0;n=Math.max(0,Math.min(t,n+(e||0))),this.seekAndCenter(n/t)}},{key:"seekAndCenter",value:function(e){this.seekTo(e),this.drawer.recenter(e)}},{key:"seekTo",value:function(e){var t=this;if("number"!=typeof e||!isFinite(e)||e<0||e>1)throw new Error("Error calling wavesurfer.seekTo, parameter must be a number between 0 and 1!");this.fireEvent("interaction",(function(){return t.seekTo(e)}));var n=this.params.scrollParent;this.params.scrollParent=!1,this.backend.seekTo(e*this.getDuration()),this.drawer.progress(e),this.params.scrollParent=n,this.fireEvent("seek",e)}},{key:"stop",value:function(){this.pause(),this.seekTo(0),this.drawer.progress(0)}},{key:"setSinkId",value:function(e){return this.backend.setSinkId(e)}},{key:"setVolume",value:function(e){this.backend.setVolume(e),this.fireEvent("volume",e)}},{key:"getVolume",value:function(){return this.backend.getVolume()}},{key:"setPlaybackRate",value:function(e){this.backend.setPlaybackRate(e)}},{key:"getPlaybackRate",value:function(){return this.backend.getPlaybackRate()}},{key:"toggleMute",value:function(){this.setMute(!this.isMuted)}},{key:"setMute",value:function(e){e!==this.isMuted?(this.backend.setMute?(this.backend.setMute(e),this.isMuted=e):e?(this.savedVolume=this.backend.getVolume(),this.backend.setVolume(0),this.isMuted=!0,this.fireEvent("volume",0)):(this.backend.setVolume(this.savedVolume),this.isMuted=!1,this.fireEvent("volume",this.savedVolume)),this.fireEvent("mute",this.isMuted)):this.fireEvent("mute",this.isMuted)}},{key:"getMute",value:function(){return this.isMuted}},{key:"getFilters",value:function(){return this.backend.filters||[]}},{key:"toggleScroll",value:function(){this.params.scrollParent=!this.params.scrollParent,this.drawBuffer()}},{key:"toggleInteraction",value:function(){this.params.interact=!this.params.interact}},{key:"getWaveColor",value:function(){return this.params.waveColor}},{key:"setWaveColor",value:function(e){this.params.waveColor=e,this.drawBuffer()}},{key:"getProgressColor",value:function(){return this.params.progressColor}},{key:"setProgressColor",value:function(e){this.params.progressColor=e,this.drawBuffer()}},{key:"getBackgroundColor",value:function(){return this.params.backgroundColor}},{key:"setBackgroundColor",value:function(e){this.params.backgroundColor=e,i.style(this.container,{background:this.params.backgroundColor})}},{key:"getCursorColor",value:function(){return this.params.cursorColor}},{key:"setCursorColor",value:function(e){this.params.cursorColor=e,this.drawer.updateCursor()}},{key:"getHeight",value:function(){return this.params.height}},{key:"setHeight",value:function(e){this.params.height=e,this.drawer.setHeight(e*this.params.pixelRatio),this.drawBuffer()}},{key:"setFilteredChannels",value:function(e){this.params.splitChannelsOptions.filterChannels=e,this.drawBuffer()}},{key:"drawBuffer",value:function(){var e,t=Math.round(this.getDuration()*this.params.minPxPerSec*this.params.pixelRatio),n=this.drawer.getWidth(),r=t,i=0,a=Math.max(i+n,r);if(this.params.fillParent&&(!this.params.scrollParent||t<n)&&(i=0,a=r=n),this.params.partialRender){var s,o=this.peakCache.addRangeToPeakCache(r,i,a);for(s=0;s<o.length;s++)e=this.backend.getPeaks(r,o[s][0],o[s][1]),this.drawer.drawPeaks(e,r,o[s][0],o[s][1])}else e=this.backend.getPeaks(r,i,a),this.drawer.drawPeaks(e,r,i,a);this.fireEvent("redraw",e,r)}},{key:"zoom",value:function(e){e?(this.params.minPxPerSec=e,this.params.scrollParent=!0):(this.params.minPxPerSec=this.defaultParams.minPxPerSec,this.params.scrollParent=!1),this.drawBuffer(),this.drawer.progress(this.backend.getPlayedPercents()),this.drawer.recenter(this.getCurrentTime()/this.getDuration()),this.fireEvent("zoom",e)}},{key:"loadArrayBuffer",value:function(e){var t=this;this.decodeArrayBuffer(e,(function(e){t.isDestroyed||t.loadDecodedBuffer(e)}))}},{key:"loadDecodedBuffer",value:function(e){this.backend.load(e),this.drawBuffer(),this.isReady=!0,this.fireEvent("ready")}},{key:"loadBlob",value:function(e){var t=this,n=new FileReader;n.addEventListener("progress",(function(e){return t.onProgress(e)})),n.addEventListener("load",(function(e){return t.loadArrayBuffer(e.target.result)})),n.addEventListener("error",(function(){return t.fireEvent("error","Error reading file")})),n.readAsArrayBuffer(e),this.empty()}},{key:"load",value:function(e,t,n,r){if(!e)throw new Error("url parameter cannot be empty");if(this.empty(),n){var i={"Preload is not 'auto', 'none' or 'metadata'":-1===["auto","metadata","none"].indexOf(n),"Peaks are not provided":!t,"Backend is not of type 'MediaElement' or 'MediaElementWebAudio'":-1===["MediaElement","MediaElementWebAudio"].indexOf(this.params.backend),"Url is not of type string":"string"!=typeof e},a=Object.keys(i).filter((function(e){return i[e]}));a.length&&(console.warn("Preload parameter of wavesurfer.load will be ignored because:\n\t- "+a.join("\n\t- ")),n=null)}switch(this.params.backend){case"WebAudio":return this.loadBuffer(e,t,r);case"MediaElement":case"MediaElementWebAudio":return this.loadMediaElement(e,t,n,r)}}},{key:"loadBuffer",value:function(e,t,n){var r=this,i=function(t){return t&&r.tmpEvents.push(r.once("ready",t)),r.getArrayBuffer(e,(function(e){return r.loadArrayBuffer(e)}))};if(!t)return i();this.backend.setPeaks(t,n),this.drawBuffer(),this.fireEvent("waveform-ready"),this.tmpEvents.push(this.once("interaction",i))}},{key:"loadMediaElement",value:function(e,t,n,r){var i=this,a=e;if("string"==typeof e)this.backend.load(a,this.mediaContainer,t,n);else{var s=e;this.backend.loadElt(s,t),a=s.src}this.tmpEvents.push(this.backend.once("canplay",(function(){i.backend.destroyed||(i.drawBuffer(),i.isReady=!0,i.fireEvent("ready"))})),this.backend.once("error",(function(e){return i.fireEvent("error",e)}))),t&&(this.backend.setPeaks(t,r),this.drawBuffer(),this.fireEvent("waveform-ready")),t&&!this.params.forceDecode||!this.backend.supportsWebAudio()||this.getArrayBuffer(a,(function(e){i.decodeArrayBuffer(e,(function(e){i.backend.buffer=e,i.backend.setPeaks(null),i.drawBuffer(),i.fireEvent("waveform-ready")}))}))}},{key:"decodeArrayBuffer",value:function(e,t){var n=this;this.arraybuffer=e,this.backend.decodeArrayBuffer(e,(function(r){n.isDestroyed||n.arraybuffer!=e||(t(r),n.arraybuffer=null)}),(function(){return n.fireEvent("error","Error decoding audiobuffer")}))}},{key:"getArrayBuffer",value:function(e,t){var n=this,r=Object.assign({url:e,responseType:"arraybuffer"},this.params.xhr),a=i.fetchFile(r);return this.currentRequest=a,this.tmpEvents.push(a.on("progress",(function(e){n.onProgress(e)})),a.on("success",(function(e){t(e),n.currentRequest=null})),a.on("error",(function(e){n.fireEvent("error",e),n.currentRequest=null}))),a}},{key:"onProgress",value:function(e){var t;t=e.lengthComputable?e.loaded/e.total:e.loaded/(e.loaded+1e6),this.fireEvent("loading",Math.round(100*t),e.target)}},{key:"exportPCM",value:function(e,t,n,r,i){e=e||1024,r=r||0,t=t||1e4,n=n||!1;var a=this.backend.getPeaks(e,r,i),s=[].map.call(a,(function(e){return Math.round(e*t)/t}));return new Promise((function(e,t){var r=JSON.stringify(s);n||window.open("data:application/json;charset=utf-8,"+encodeURIComponent(r)),e(r)}))}},{key:"exportImage",value:function(e,t,n){return e||(e="image/png"),t||(t=1),n||(n="dataURL"),this.drawer.getImage(e,t,n)}},{key:"cancelAjax",value:function(){this.currentRequest&&this.currentRequest.controller&&(this.currentRequest._reader&&this.currentRequest._reader.cancel().catch((function(e){})),this.currentRequest.controller.abort(),this.currentRequest=null)}},{key:"clearTmpEvents",value:function(){this.tmpEvents.forEach((function(e){return 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