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wavesurfer.js

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Interactive navigable audio visualization using Web Audio and Canvas

wavesurfer-js.org

wavesurfer-js/wavesurfer.js

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/*! * wavesurfer.js 6.6.3 (2023-04-04) * https://wavesurfer-js.org * @license BSD-3-Clause */ !function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define("WaveSurfer",[],t):"object"==typeof exports?exports.WaveSurfer=t():e.WaveSurfer=t()}(self,(()=>{return e={427:(e,t,r)=>{"use strict";Object.defineProperty(t,"__esModule",{value:!0}),t.default=void 0;var n=a(r(138)),i=a(r(56));function a(e){return e&&e.__esModule?e:{default:e}}function o(e){return o="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},o(e)}function s(e,t){for(var r=0;r<t.length;r++){var n=t[r];n.enumerable=n.enumerable||!1,n.configurable=!0,"value"in n&&(n.writable=!0),Object.defineProperty(e,(i=n.key,a=void 0,a=function(e,t){if("object"!==o(e)||null===e)return e;var r=e[Symbol.toPrimitive];if(void 0!==r){var n=r.call(e,t||"default");if("object"!==o(n))return n;throw new TypeError("@@toPrimitive must return a primitive value.")}return("string"===t?String:Number)(e)}(i,"string"),"symbol"===o(a)?a:String(a)),n)}var i,a}var u=function(){function e(){!function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,e),this.wave=null,this.waveCtx=null,this.progress=null,this.progressCtx=null,this.start=0,this.end=1,this.id=(0,i.default)(void 0!==this.constructor.name?this.constructor.name.toLowerCase()+"_":"canvasentry_"),this.canvasContextAttributes={}}var t,r,a;return t=e,(r=[{key:"initWave",value:function(e){this.wave=e,this.waveCtx=this.wave.getContext("2d",this.canvasContextAttributes)}},{key:"initProgress",value:function(e){this.progress=e,this.progressCtx=this.progress.getContext("2d",this.canvasContextAttributes)}},{key:"updateDimensions",value:function(e,t,r,i){this.start=this.wave.offsetLeft/t||0,this.end=this.start+e/t,this.wave.width=r,this.wave.height=i;var a={width:e+"px"};(0,n.default)(this.wave,a),this.hasProgressCanvas&&(this.progress.width=r,this.progress.height=i,(0,n.default)(this.progress,a))}},{key:"clearWave",value:function(){this.waveCtx.clearRect(0,0,this.waveCtx.canvas.width,this.waveCtx.canvas.height),this.hasProgressCanvas&&this.progressCtx.clearRect(0,0,this.progressCtx.canvas.width,this.progressCtx.canvas.height)}},{key:"setFillStyles",value:function(e,t){this.waveCtx.fillStyle=this.getFillStyle(this.waveCtx,e),this.hasProgressCanvas&&(this.progressCtx.fillStyle=this.getFillStyle(this.progressCtx,t))}},{key:"getFillStyle",value:function(e,t){if("string"==typeof t||t instanceof CanvasGradient)return t;var r=e.createLinearGradient(0,0,0,e.canvas.height);return t.forEach((function(e,n){return r.addColorStop(n/t.length,e)})),r}},{key:"applyCanvasTransforms",value:function(e){e&&(this.waveCtx.setTransform(0,1,1,0,0,0),this.hasProgressCanvas&&this.progressCtx.setTransform(0,1,1,0,0,0))}},{key:"fillRects",value:function(e,t,r,n,i){this.fillRectToContext(this.waveCtx,e,t,r,n,i),this.hasProgressCanvas&&this.fillRectToContext(this.progressCtx,e,t,r,n,i)}},{key:"fillRectToContext",value:function(e,t,r,n,i,a){e&&(a?this.drawRoundedRect(e,t,r,n,i,a):e.fillRect(t,r,n,i))}},{key:"drawRoundedRect",value:function(e,t,r,n,i,a){0!==i&&(i<0&&(r-=i*=-1),e.beginPath(),e.moveTo(t+a,r),e.lineTo(t+n-a,r),e.quadraticCurveTo(t+n,r,t+n,r+a),e.lineTo(t+n,r+i-a),e.quadraticCurveTo(t+n,r+i,t+n-a,r+i),e.lineTo(t+a,r+i),e.quadraticCurveTo(t,r+i,t,r+i-a),e.lineTo(t,r+a),e.quadraticCurveTo(t,r,t+a,r),e.closePath(),e.fill())}},{key:"drawLines",value:function(e,t,r,n,i,a){this.drawLineToContext(this.waveCtx,e,t,r,n,i,a),this.hasProgressCanvas&&this.drawLineToContext(this.progressCtx,e,t,r,n,i,a)}},{key:"drawLineToContext",value:function(e,t,r,n,i,a,o){if(e){var s,u,l,c=t.length/2,f=Math.round(c*this.start),h=f,d=Math.round(c*this.end)+1,p=this.wave.width/(d-h-1),v=n+i,y=r/n;for(e.beginPath(),e.moveTo((h-f)*p,v),e.lineTo((h-f)*p,v-Math.round((t[2*h]||0)/y)),s=h;s<d;s++)u=t[2*s]||0,l=Math.round(u/y),e.lineTo((s-f)*p+this.halfPixel,v-l);for(var m=d-1;m>=h;m--)u=t[2*m+1]||0,l=Math.round(u/y),e.lineTo((m-f)*p+this.halfPixel,v-l);e.lineTo((h-f)*p,v-Math.round((t[2*h+1]||0)/y)),e.closePath(),e.fill()}}},{key:"destroy",value:function(){this.waveCtx=null,this.wave=null,this.progressCtx=null,this.progress=null}},{key:"getImage",value:function(e,t,r){var n=this;return"blob"===r?new Promise((function(r){n.wave.toBlob(r,e,t)})):"dataURL"===r?this.wave.toDataURL(e,t):void 0}}])&&s(t.prototype,r),a&&s(t,a),Object.defineProperty(t,"prototype",{writable:!1}),e}();t.default=u,e.exports=t.default},276:(e,t,r)=>{"use strict";function n(e){return n="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return 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ReferenceError("this hasn't been initialised - super() hasn't been called");return e}(e)}(this,r)}}function l(e){return l=Object.setPrototypeOf?Object.getPrototypeOf.bind():function(e){return e.__proto__||Object.getPrototypeOf(e)},l(e)}var c=function(e){!function(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),Object.defineProperty(e,"prototype",{writable:!1}),t&&s(e,t)}(l,e);var t,r,n,a=u(l);function l(e,t){var r;return function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,l),(r=a.call(this)).container=i.withOrientation(e,t.vertical),r.params=t,r.width=0,r.height=t.height*r.params.pixelRatio,r.lastPos=0,r.wrapper=null,r}return t=l,(r=[{key:"style",value:function(e,t){return i.style(e,t)}},{key:"createWrapper",value:function(){this.wrapper=i.withOrientation(this.container.appendChild(document.createElement("wave")),this.params.vertical),this.style(this.wrapper,{display:"block",position:"relative",userSelect:"none",webkitUserSelect:"none",height:this.params.height+"px"}),(this.params.fillParent||this.params.scrollParent)&&this.style(this.wrapper,{width:"100%",cursor:this.params.hideCursor?"none":"auto",overflowX:this.params.hideScrollbar?"hidden":"auto",overflowY:"hidden"}),this.setupWrapperEvents()}},{key:"handleEvent",value:function(e,t){!t&&e.preventDefault();var r,n=i.withOrientation(e.targetTouches?e.targetTouches[0]:e,this.params.vertical).clientX,a=this.wrapper.getBoundingClientRect(),o=this.width,s=this.getWidth(),u=this.getProgressPixels(a,n);return r=!this.params.fillParent&&o<s?u*(this.params.pixelRatio/o)||0:(u+this.wrapper.scrollLeft)/this.wrapper.scrollWidth||0,i.clamp(r,0,1)}},{key:"getProgressPixels",value:function(e,t){return this.params.rtl?e.right-t:t-e.left}},{key:"setupWrapperEvents",value:function(){var e=this;this.wrapper.addEventListener("click",(function(t){var r=i.withOrientation(t,e.params.vertical),n=e.wrapper.offsetHeight-e.wrapper.clientHeight;if(0!==n){var a=e.wrapper.getBoundingClientRect();if(r.clientY>=a.bottom-n)return}e.params.interact&&e.fireEvent("click",t,e.handleEvent(t))})),this.wrapper.addEventListener("dblclick",(function(t){e.params.interact&&e.fireEvent("dblclick",t,e.handleEvent(t))})),this.wrapper.addEventListener("scroll",(function(t){return e.fireEvent("scroll",t)}))}},{key:"drawPeaks",value:function(e,t,r,n){this.setWidth(t)||this.clearWave(),this.params.barWidth?this.drawBars(e,0,r,n):this.drawWave(e,0,r,n)}},{key:"resetScroll",value:function(){null!==this.wrapper&&(this.wrapper.scrollLeft=0)}},{key:"recenter",value:function(e){var t=this.wrapper.scrollWidth*e;this.recenterOnPosition(t,!0)}},{key:"recenterOnPosition",value:function(e,t){var r=this.wrapper.scrollLeft,n=~~(this.wrapper.clientWidth/2),i=this.wrapper.scrollWidth-this.wrapper.clientWidth,a=e-n,o=a-r;if(0!=i){if(!t&&-n<=o&&o<n){var s=this.params.autoCenterRate;s/=n,s*=i,a=r+(o=Math.max(-s,Math.min(s,o)))}(a=Math.max(0,Math.min(i,a)))!=r&&(this.wrapper.scrollLeft=a)}}},{key:"getScrollX",value:function(){var e=0;if(this.wrapper){var t=this.params.pixelRatio;if(e=Math.round(this.wrapper.scrollLeft*t),this.params.scrollParent){var r=~~(this.wrapper.scrollWidth*t-this.getWidth());e=Math.min(r,Math.max(0,e))}}return e}},{key:"getWidth",value:function(){return Math.round(this.container.clientWidth*this.params.pixelRatio)}},{key:"setWidth",value:function(e){if(this.width==e)return!1;if(this.width=e,this.params.fillParent||this.params.scrollParent)this.style(this.wrapper,{width:""});else{var t=~~(this.width/this.params.pixelRatio)+"px";this.style(this.wrapper,{width:t})}return this.updateSize(),!0}},{key:"setHeight",value:function(e){return e!=this.height&&(this.height=e,this.style(this.wrapper,{height:~~(this.height/this.params.pixelRatio)+"px"}),this.updateSize(),!0)}},{key:"progress",value:function(e){var t=1/this.params.pixelRatio,r=Math.round(e*this.width)*t;if(r<this.lastPos||r-this.lastPos>=t){if(this.lastPos=r,this.params.scrollParent&&this.params.autoCenter){var n=~~(this.wrapper.scrollWidth*e);this.recenterOnPosition(n,this.params.autoCenterImmediately)}this.updateProgress(r)}}},{key:"destroy",value:function(){this.unAll(),this.wrapper&&(this.wrapper.parentNode==this.container.domElement&&this.container.removeChild(this.wrapper.domElement),this.wrapper=null)}},{key:"updateCursor",value:function(){}},{key:"updateSize",value:function(){}},{key:"drawBars",value:function(e,t,r,n){}},{key:"drawWave",value:function(e,t,r,n){}},{key:"clearWave",value:function(){}},{key:"updateProgress",value:function(e){}}])&&o(t.prototype,r),n&&o(t,n),Object.defineProperty(t,"prototype",{writable:!1}),l}(i.Observer);t.default=c,e.exports=t.default},646:(e,t,r)=>{"use strict";function n(e){return n="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},n(e)}Object.defineProperty(t,"__esModule",{value:!0}),t.default=void 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TypeError("@@toPrimitive must return a primitive value.")}return("string"===t?String:Number)(e)}(a,"string"),"symbol"===n(o)?o:String(o)),i)}var a,o}function c(e,t){return c=Object.setPrototypeOf?Object.setPrototypeOf.bind():function(e,t){return e.__proto__=t,e},c(e,t)}function f(e){var t=function(){if("undefined"==typeof Reflect||!Reflect.construct)return!1;if(Reflect.construct.sham)return!1;if("function"==typeof Proxy)return!0;try{return Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],(function(){}))),!0}catch(e){return!1}}();return function(){var r,i=h(e);if(t){var a=h(this).constructor;r=Reflect.construct(i,arguments,a)}else r=i.apply(this,arguments);return function(e,t){if(t&&("object"===n(t)||"function"==typeof t))return t;if(void 0!==t)throw new TypeError("Derived constructors may only return object or undefined");return function(e){if(void 0===e)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return e}(e)}(this,r)}}function h(e){return h=Object.setPrototypeOf?Object.getPrototypeOf.bind():function(e){return e.__proto__||Object.getPrototypeOf(e)},h(e)}var d=function(e){!function(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),Object.defineProperty(e,"prototype",{writable:!1}),t&&c(e,t)}(s,e);var t,r,n,i=f(s);function s(e,t){var r;return function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}(this,s),(r=i.call(this,e,t)).maxCanvasWidth=t.maxCanvasWidth,r.maxCanvasElementWidth=Math.round(t.maxCanvasWidth/t.pixelRatio),r.hasProgressCanvas=t.waveColor!=t.progressColor,r.halfPixel=.5/t.pixelRatio,r.canvases=[],r.progressWave=null,r.EntryClass=o.default,r.canvasContextAttributes=t.drawingContextAttributes,r.overlap=2*Math.ceil(t.pixelRatio/2),r.barRadius=t.barRadius||0,r.vertical=t.vertical,r}return t=s,r=[{key:"init",value:function(){this.createWrapper(),this.createElements()}},{key:"createElements",value:function(){this.progressWave=a.withOrientation(this.wrapper.appendChild(document.createElement("wave")),this.params.vertical),this.style(this.progressWave,{position:"absolute",zIndex:3,left:0,top:0,bottom:0,overflow:"hidden",width:"0",display:"none",boxSizing:"border-box",borderRightStyle:"solid",pointerEvents:"none"}),this.addCanvas(),this.updateCursor()}},{key:"updateCursor",value:function(){this.style(this.progressWave,{borderRightWidth:this.params.cursorWidth+"px",borderRightColor:this.params.cursorColor})}},{key:"updateSize",value:function(){for(var e=this,t=Math.round(this.width/this.params.pixelRatio),r=Math.ceil(t/(this.maxCanvasElementWidth+this.overlap));this.canvases.length<r;)this.addCanvas();for(;this.canvases.length>r;)this.removeCanvas();var n=this.maxCanvasWidth+this.overlap,i=this.canvases.length-1;this.canvases.forEach((function(t,r){r==i&&(n=e.width-e.maxCanvasWidth*i),e.updateDimensions(t,n,e.height),t.clearWave()}))}},{key:"addCanvas",value:function(){var e=new this.EntryClass;e.canvasContextAttributes=this.canvasContextAttributes,e.hasProgressCanvas=this.hasProgressCanvas,e.halfPixel=this.halfPixel;var t=this.maxCanvasElementWidth*this.canvases.length,r=a.withOrientation(this.wrapper.appendChild(document.createElement("canvas")),this.params.vertical);if(this.style(r,{position:"absolute",zIndex:2,left:t+"px",top:0,bottom:0,height:"100%",pointerEvents:"none"}),e.initWave(r),this.hasProgressCanvas){var n=a.withOrientation(this.progressWave.appendChild(document.createElement("canvas")),this.params.vertical);this.style(n,{position:"absolute",left:t+"px",top:0,bottom:0,height:"100%"}),e.initProgress(n)}this.canvases.push(e)}},{key:"removeCanvas",value:function(){var e=this.canvases[this.canvases.length-1];e.wave.parentElement.removeChild(e.wave.domElement),this.hasProgressCanvas&&e.progress.parentElement.removeChild(e.progress.domElement),e&&(e.destroy(),e=null),this.canvases.pop()}},{key:"updateDimensions",value:function(e,t,r){var n=Math.round(t/this.params.pixelRatio),i=Math.round(this.width/this.params.pixelRatio);e.updateDimensions(n,i,t,r),this.style(this.progressWave,{display:"block"})}},{key:"clearWave",value:function(){var e=this;a.frame((function(){e.canvases.forEach((function(e){return e.clearWave()}))}))()}},{key:"drawBars",value:function(e,t,r,n){var i=this;return this.prepareDraw(e,t,r,n,(function(e){var t=e.absmax,a=e.hasMinVals,o=(e.height,e.offsetY),s=e.halfH,u=e.peaks,l=e.channelIndex;if(void 0!==r)for(var c=a?2:1,f=u.length/c,h=i.params.barWidth*i.params.pixelRatio,d=h+(null===i.params.barGap?Math.max(i.params.pixelRatio,~~(h/2)):Math.max(i.params.pixelRatio,i.params.barGap*i.params.pixelRatio)),p=f/i.width,v=n,y=r;y<v;y+=d){var m=0,b=Math.floor(y*p)*c,g=Math.floor((y+d)*p)*c;do{var A=Math.abs(u[b]);A>m&&(m=A),b+=c}while(b<g);var k=Math.round(m/t*s);i.params.barMinHeight&&(k=Math.max(k,i.params.barMinHeight)),i.fillRect(y+i.halfPixel,s-k+o,h+i.halfPixel,2*k,i.barRadius,l)}}))}},{key:"drawWave",value:function(e,t,r,n){var i=this;return this.prepareDraw(e,t,r,n,(function(e){var t=e.absmax,a=e.hasMinVals,o=(e.height,e.offsetY),s=e.halfH,u=e.peaks,l=e.channelIndex;if(!a){for(var c=[],f=u.length,h=0;h<f;h++)c[2*h]=u[h],c[2*h+1]=-u[h];u=c}void 0!==r&&i.drawLine(u,t,s,o,r,n,l),i.fillRect(0,s+o-i.halfPixel,i.width,i.halfPixel,i.barRadius,l)}))}},{key:"drawLine",value:function(e,t,r,n,i,a,o){var s=this,u=this.params.splitChannelsOptions.channelColors[o]||{},l=u.waveColor,c=u.progressColor;this.canvases.forEach((function(o,u){s.setFillStyles(o,l,c),s.applyCanvasTransforms(o,s.params.vertical),o.drawLines(e,t,r,n,i,a)}))}},{key:"fillRect",value:function(e,t,r,n,i,a){for(var o=Math.floor(e/this.maxCanvasWidth),s=Math.min(Math.ceil((e+r)/this.maxCanvasWidth)+1,this.canvases.length),u=o;u<s;u++){var l=this.canvases[u],c=u*this.maxCanvasWidth,f={x1:Math.max(e,u*this.maxCanvasWidth),y1:t,x2:Math.min(e+r,u*this.maxCanvasWidth+l.wave.width),y2:t+n};if(f.x1<f.x2){var h=this.params.splitChannelsOptions.channelColors[a]||{},d=h.waveColor,p=h.progressColor;this.setFillStyles(l,d,p),this.applyCanvasTransforms(l,this.params.vertical),l.fillRects(f.x1-c,f.y1,f.x2-f.x1,f.y2-f.y1,i)}}}},{key:"hideChannel",value:function(e){return this.params.splitChannels&&this.params.splitChannelsOptions.filterChannels.includes(e)}},{key:"prepareDraw",value:function(e,t,r,n,i,o,s){var u=this;return a.frame((function(){if(e[0]instanceof Array){var l=e;if(u.params.splitChannels){var c,f=l.filter((function(e,t){return!u.hideChannel(t)}));return 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