wavesurfer.js/dist/plugins/envelope.min.js

Audio waveform player

!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):((t="undefined"!=typeof globalThis?globalThis:t||self).WaveSurfer=t.WaveSurfer||{},t.WaveSurfer.Envelope=e())}(this,(function(){"use strict";class t{constructor(){this.listeners={}}on(t,e,i){if(this.listeners[t]||(this.listeners[t]=new Set),this.listeners[t].add(e),null==i?void 0:i.once){const i=()=>{this.un(t,i),this.un(t,e)};return this.on(t,i),i}return()=>this.un(t,e)}un(t,e){var i;null===(i=this.listeners[t])||void 0===i||i.delete(e)}once(t,e){return this.on(t,e,{once:!0})}unAll(){this.listeners={}}emit(t,...e){this.listeners[t]&&this.listeners[t].forEach((t=>t(...e)))}}class e extends t{constructor(t){super(),this.subscriptions=[],this.options=t}onInit(){}_init(t){this.wavesurfer=t,this.onInit()}destroy(){this.emit("destroy"),this.subscriptions.forEach((t=>t()))}}function i(t,e,i,o,n=3,s=0,r=100){if(!t)return()=>{};const l=matchMedia("(pointer: coarse)").matches;let a=()=>{};const h=h=>{if(h.button!==s)return;h.preventDefault(),h.stopPropagation();let u=h.clientX,c=h.clientY,d=!1;const p=Date.now(),m=o=>{if(o.preventDefault(),o.stopPropagation(),l&&Date.now()-p<r)return;const s=o.clientX,a=o.clientY,h=s-u,m=a-c;if(d||Math.abs(h)>n||Math.abs(m)>n){const o=t.getBoundingClientRect(),{left:n,top:r}=o;d||(null==i||i(u-n,c-r),d=!0),e(h,m,s-n,a-r),u=s,c=a}},v=e=>{if(d){const i=e.clientX,n=e.clientY,s=t.getBoundingClientRect(),{left:r,top:l}=s;null==o||o(i-r,n-l)}a()},g=t=>{t.relatedTarget&&t.relatedTarget!==document.documentElement||v(t)},f=t=>{d&&(t.stopPropagation(),t.preventDefault())},y=t=>{d&&t.preventDefault()};document.addEventListener("pointermove",m),document.addEventListener("pointerup",v),document.addEventListener("pointerout",g),document.addEventListener("pointercancel",g),document.addEventListener("touchmove",y,{passive:!1}),document.addEventListener("click",f,{capture:!0}),a=()=>{document.removeEventListener("pointermove",m),document.removeEventListener("pointerup",v),document.removeEventListener("pointerout",g),document.removeEventListener("pointercancel",g),document.removeEventListener("touchmove",y),setTimeout((()=>{document.removeEventListener("click",f,{capture:!0})}),10)}};return t.addEventListener("pointerdown",h),()=>{a(),t.removeEventListener("pointerdown",h)}}function o(t,e){const i=e.xmlns?document.createElementNS(e.xmlns,t):document.createElement(t);for(const[t,n]of Object.entries(e))if("children"===t)for(const[t,n]of Object.entries(e))"string"==typeof n?i.appendChild(document.createTextNode(n)):i.appendChild(o(t,n));else"style"===t?Object.assign(i.style,n):"textContent"===t?i.textContent=n:i.setAttribute(t,n.toString());return i}function n(t,e,i){const n=o(t,e||{});return null==i||i.appendChild(n),n}const s={points:[],lineWidth:4,lineColor:"rgba(0, 0, 255, 0.5)",dragPointSize:10,dragPointFill:"rgba(255, 255, 255, 0.8)",dragPointStroke:"rgba(255, 255, 255, 0.8)"};class r extends t{constructor(t,e){super(),this.subscriptions=[],this.subscriptions=[],this.options=t,this.polyPoints=new Map;const o=e.clientWidth,s=e.clientHeight,r=n("svg",{xmlns:"http://www.w3.org/2000/svg",width:"100%",height:"100%",viewBox:`0 0 ${o} ${s}`,preserveAspectRatio:"none",style:{position:"absolute",left:"0",top:"0",zIndex:"4"},part:"envelope"},e);this.svg=r;const l=n("polyline",{xmlns:"http://www.w3.org/2000/svg",points:`0,${s} ${o},${s}`,stroke:t.lineColor,"stroke-width":t.lineWidth,fill:"none",part:"polyline",style:t.dragLine?{cursor:"row-resize",pointerEvents:"stroke"}:{}},r);t.dragLine&&this.subscriptions.push(i(l,((t,e)=>{const{height:i}=r.viewBox.baseVal,{points:o}=l;for(let t=1;t<o.numberOfItems-1;t++){const n=o.getItem(t);n.y=Math.min(i,Math.max(0,n.y+e))}const n=r.querySelectorAll("ellipse");Array.from(n).forEach((t=>{const o=Math.min(i,Math.max(0,Number(t.getAttribute("cy"))+e));t.setAttribute("cy",o.toString())})),this.emit("line-move",e/i)}))),r.addEventListener("dblclick",(t=>{const e=r.getBoundingClientRect(),i=t.clientX-e.left,o=t.clientY-e.top;this.emit("point-create",i/e.width,o/e.height)}));{let t;const e=()=>clearTimeout(t);r.addEventListener("touchstart",(i=>{1===i.touches.length?t=window.setTimeout((()=>{i.preventDefault();const t=r.getBoundingClientRect(),e=i.touches[0].clientX-t.left,o=i.touches[0].clientY-t.top;this.emit("point-create",e/t.width,o/t.height)}),500):e()})),r.addEventListener("touchmove",e),r.addEventListener("touchend",e)}}makeDraggable(t,e){this.subscriptions.push(i(t,e,(()=>t.style.cursor="grabbing"),(()=>t.style.cursor="grab"),1))}createCircle(t,e){const i=this.options.dragPointSize/2;return n("ellipse",{xmlns:"http://www.w3.org/2000/svg",cx:t,cy:e,rx:i,ry:i,fill:this.options.dragPointFill,stroke:this.options.dragPointStroke,"stroke-width":"2",style:{cursor:"grab",pointerEvents:"all"},part:"envelope-circle"},this.svg)}removePolyPoint(t){const e=this.polyPoints.get(t);if(!e)return;const{polyPoint:i,circle:o}=e,{points:n}=this.svg.querySelector("polyline"),s=Array.from(n).findIndex((t=>t.x===i.x&&t.y===i.y));n.removeItem(s),o.remove(),this.polyPoints.delete(t)}addPolyPoint(t,e,i){const{svg:o}=this,{width:n,height:s}=o.viewBox.baseVal,r=t*n,l=s-e*s,a=this.options.dragPointSize/2,h=o.createSVGPoint();h.x=t*n,h.y=s-e*s;const u=this.createCircle(r,l),{points:c}=o.querySelector("polyline"),d=Array.from(c).findIndex((t=>t.x>=r));c.insertItemBefore(h,Math.max(d,1)),this.polyPoints.set(i,{polyPoint:h,circle:u}),this.makeDraggable(u,((t,e)=>{const o=h.x+t,r=h.y+e;if(o<-a||r<-a||o>n+a||r>s+a)return void this.emit("point-dragout",i);const l=Array.from(c).find((t=>t.x>h.x)),d=Array.from(c).findLast((t=>t.x<h.x));l&&o>=l.x||d&&o<=d.x||(h.x=o,h.y=r,u.setAttribute("cx",o.toString()),u.setAttribute("cy",r.toString()),this.emit("point-move",i,o/n,r/s))}))}update(){const{svg:t}=this,e=t.viewBox.baseVal.width/t.clientWidth,i=t.viewBox.baseVal.height/t.clientHeight;t.querySelectorAll("ellipse").forEach((t=>{const o=this.options.dragPointSize/2,n=o*e,s=o*i;t.setAttribute("rx",n.toString()),t.setAttribute("ry",s.toString())}))}destroy(){this.subscriptions.forEach((t=>t())),this.polyPoints.clear(),this.svg.remove()}}class l extends e{constructor(t){super(t),this.polyline=null,this.throttleTimeout=null,this.volume=1,this.points=t.points||[],this.options=Object.assign({},s,t),this.options.lineColor=this.options.lineColor||s.lineColor,this.options.dragPointFill=this.options.dragPointFill||s.dragPointFill,this.options.dragPointStroke=this.options.dragPointStroke||s.dragPointStroke,this.options.dragPointSize=this.options.dragPointSize||s.dragPointSize}static create(t){return new l(t)}addPoint(t){var e;t.id||(t.id=Math.random().toString(36).slice(2));const i=this.points.findLastIndex((e=>e.time<t.time));this.points.splice(i+1,0,t),this.emitPoints();const o=null===(e=this.wavesurfer)||void 0===e?void 0:e.getDuration();o&&this.addPolyPoint(t,o)}removePoint(t){var e;const i=this.points.indexOf(t);i>-1&&(this.points.splice(i,1),null===(e=this.polyline)||void 0===e||e.removePolyPoint(t),this.emitPoints())}getPoints(){return this.points}setPoints(t){this.points.slice().forEach((t=>this.removePoint(t))),t.forEach((t=>this.addPoint(t)))}destroy(){var t;null===(t=this.polyline)||void 0===t||t.destroy(),super.destroy()}getCurrentVolume(){return this.volume}setVolume(t){var e;this.volume=t,null===(e=this.wavesurfer)||void 0===e||e.setVolume(t)}onInit(){var t;if(!this.wavesurfer)throw Error("WaveSurfer is not initialized");const{options:e}=this;e.volume=null!==(t=e.volume)&&void 0!==t?t:this.wavesurfer.getVolume(),this.setVolume(e.volume),this.subscriptions.push(this.wavesurfer.on("decode",(t=>{this.initPolyline(),this.points.forEach((e=>{this.addPolyPoint(e,t)}))})),this.wavesurfer.on("redraw",(()=>{var t;null===(t=this.polyline)||void 0===t||t.update()})),this.wavesurfer.on("timeupdate",(t=>{this.onTimeUpdate(t)})))}emitPoints(){this.throttleTimeout&&clearTimeout(this.throttleTimeout),this.throttleTimeout=setTimeout((()=>{this.emit("points-change",this.points)}),200)}initPolyline(){if(this.polyline&&this.polyline.destroy(),!this.wavesurfer)return;const t=this.wavesurfer.getWrapper();this.polyline=new r(this.options,t),this.subscriptions.push(this.polyline.on("point-move",((t,e,i)=>{var o;const n=(null===(o=this.wavesurfer)||void 0===o?void 0:o.getDuration())||0;t.time=e*n,t.volume=1-i,this.emitPoints()})),this.polyline.on("point-dragout",(t=>{this.removePoint(t)})),this.polyline.on("point-create",((t,e)=>{var i;this.addPoint({time:t*((null===(i=this.wavesurfer)||void 0===i?void 0:i.getDuration())||0),volume:1-e})})),this.polyline.on("line-move",(t=>{var e;this.points.forEach((e=>{e.volume=Math.min(1,Math.max(0,e.volume-t))})),this.emitPoints(),this.onTimeUpdate((null===(e=this.wavesurfer)||void 0===e?void 0:e.getCurrentTime())||0)})))}addPolyPoint(t,e){var i;null===(i=this.polyline)||void 0===i||i.addPolyPoint(t.time/e,t.volume,t)}onTimeUpdate(t){if(!this.wavesurfer)return;let e=this.points.find((e=>e.time>t));e||(e={time:this.wavesurfer.getDuration()||0,volume:0});let i=this.points.findLast((e=>e.time<=t));i||(i={time:0,volume:0});const o=e.time-i.time,n=e.volume-i.volume,s=i.volume+(t-i.time)*(n/o),r=Math.min(1,Math.max(0,s)),l=Math.round(100*r)/100;l!==this.getCurrentVolume()&&(this.setVolume(l),this.emit("volume-change",l))}}return l}));