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6 lines
37 KiB
6 lines
37 KiB
/*! wavesurfer.js 1.4.0 (Mon, 10 Apr 2017 08:55:35 GMT)
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* https://github.com/katspaugh/wavesurfer.js
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* @license BSD-3-Clause */
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!function(a,b){"function"==typeof define&&define.amd?define("wavesurfer",[],function(){return a.WaveSurfer=b()}):"object"==typeof exports?module.exports=b():a.WaveSurfer=b()}(this,function(){"use strict";var a={defaultParams:{audioContext:null,audioRate:1,autoCenter:!0,backend:"WebAudio",barHeight:1,closeAudioContext:!1,container:null,cursorColor:"#333",cursorWidth:1,dragSelection:!0,fillParent:!0,forceDecode:!1,height:128,hideScrollbar:!1,interact:!0,loopSelection:!0,mediaContainer:null,mediaControls:!1,mediaType:"audio",minPxPerSec:20,partialRender:!1,pixelRatio:window.devicePixelRatio||screen.deviceXDPI/screen.logicalXDPI,progressColor:"#555",normalize:!1,renderer:"MultiCanvas",scrollParent:!1,skipLength:2,splitChannels:!1,waveColor:"#999"},init:function(b){if(this.params=a.util.extend({},this.defaultParams,b),this.container="string"==typeof b.container?document.querySelector(this.params.container):this.params.container,!this.container)throw new Error("Container element not found");if(null==this.params.mediaContainer?this.mediaContainer=this.container:"string"==typeof this.params.mediaContainer?this.mediaContainer=document.querySelector(this.params.mediaContainer):this.mediaContainer=this.params.mediaContainer,!this.mediaContainer)throw new Error("Media Container element not found");this.savedVolume=0,this.isMuted=!1,this.tmpEvents=[],this.currentAjax=null,this.createDrawer(),this.createBackend(),this.createPeakCache(),this.isDestroyed=!1},createDrawer:function(){var b=this;this.drawer=Object.create(a.Drawer[this.params.renderer]),this.drawer.init(this.container,this.params),this.drawer.on("redraw",function(){b.drawBuffer(),b.drawer.progress(b.backend.getPlayedPercents())}),this.drawer.on("click",function(a,c){setTimeout(function(){b.seekTo(c)},0)}),this.drawer.on("scroll",function(a){b.params.partialRender&&b.drawBuffer(),b.fireEvent("scroll",a)})},createBackend:function(){var b=this;this.backend&&this.backend.destroy(),"AudioElement"==this.params.backend&&(this.params.backend="MediaElement"),"WebAudio"!=this.params.backend||a.WebAudio.supportsWebAudio()||(this.params.backend="MediaElement"),this.backend=Object.create(a[this.params.backend]),this.backend.init(this.params),this.backend.on("finish",function(){b.fireEvent("finish")}),this.backend.on("play",function(){b.fireEvent("play")}),this.backend.on("pause",function(){b.fireEvent("pause")}),this.backend.on("audioprocess",function(a){b.drawer.progress(b.backend.getPlayedPercents()),b.fireEvent("audioprocess",a)})},createPeakCache:function(){this.params.partialRender&&(this.peakCache=Object.create(a.PeakCache),this.peakCache.init())},getDuration:function(){return this.backend.getDuration()},getCurrentTime:function(){return this.backend.getCurrentTime()},play:function(a,b){this.fireEvent("interaction",this.play.bind(this,a,b)),this.backend.play(a,b)},pause:function(){this.backend.isPaused()||this.backend.pause()},playPause:function(){this.backend.isPaused()?this.play():this.pause()},isPlaying:function(){return!this.backend.isPaused()},skipBackward:function(a){this.skip(-a||-this.params.skipLength)},skipForward:function(a){this.skip(a||this.params.skipLength)},skip:function(a){var b=this.getCurrentTime()||0,c=this.getDuration()||1;b=Math.max(0,Math.min(c,b+(a||0))),this.seekAndCenter(b/c)},seekAndCenter:function(a){this.seekTo(a),this.drawer.recenter(a)},seekTo:function(a){this.fireEvent("interaction",this.seekTo.bind(this,a));var b=this.backend.isPaused();b||this.backend.pause();var c=this.params.scrollParent;this.params.scrollParent=!1,this.backend.seekTo(a*this.getDuration()),this.drawer.progress(this.backend.getPlayedPercents()),b||this.backend.play(),this.params.scrollParent=c,this.fireEvent("seek",a)},stop:function(){this.pause(),this.seekTo(0),this.drawer.progress(0)},setVolume:function(a){this.backend.setVolume(a)},getVolume:function(){return this.backend.getVolume()},setPlaybackRate:function(a){this.backend.setPlaybackRate(a)},getPlaybackRate:function(){return this.backend.getPlaybackRate()},toggleMute:function(){this.setMute(!this.isMuted)},setMute:function(a){a!==this.isMuted&&(a?(this.savedVolume=this.backend.getVolume(),this.backend.setVolume(0),this.isMuted=!0):(this.backend.setVolume(this.savedVolume),this.isMuted=!1))},getMute:function(){return this.isMuted},getFilters:function(){return this.backend.filters||[]},toggleScroll:function(){this.params.scrollParent=!this.params.scrollParent,this.drawBuffer()},toggleInteraction:function(){this.params.interact=!this.params.interact},drawBuffer:function(){var a=Math.round(this.getDuration()*this.params.minPxPerSec*this.params.pixelRatio),b=this.drawer.getWidth(),c=a,d=this.drawer.getScrollX(),e=Math.min(d+b,c);if(this.params.fillParent&&(!this.params.scrollParent||a<b)&&(c=b,d=0,e=c),this.params.partialRender)for(var f=this.peakCache.addRangeToPeakCache(c,d,e),g=0;g<f.length;g++){var h=this.backend.getPeaks(c,f[g][0],f[g][1]);this.drawer.drawPeaks(h,c,f[g][0],f[g][1])}else{d=0,e=c;var h=this.backend.getPeaks(c,d,e);this.drawer.drawPeaks(h,c,d,e)}this.fireEvent("redraw",h,c)},zoom:function(a){this.params.minPxPerSec=a,this.params.scrollParent=!0,this.drawBuffer(),this.drawer.progress(this.backend.getPlayedPercents()),this.drawer.recenter(this.getCurrentTime()/this.getDuration()),this.fireEvent("zoom",a)},loadArrayBuffer:function(a){this.decodeArrayBuffer(a,function(a){this.isDestroyed||this.loadDecodedBuffer(a)}.bind(this))},loadDecodedBuffer:function(a){this.backend.load(a),this.drawBuffer(),this.fireEvent("ready")},loadBlob:function(a){var b=this,c=new FileReader;c.addEventListener("progress",function(a){b.onProgress(a)}),c.addEventListener("load",function(a){b.loadArrayBuffer(a.target.result)}),c.addEventListener("error",function(){b.fireEvent("error","Error reading file")}),c.readAsArrayBuffer(a),this.empty()},load:function(a,b,c){switch(this.empty(),this.isMuted=!1,this.params.backend){case"WebAudio":return this.loadBuffer(a,b);case"MediaElement":return this.loadMediaElement(a,b,c)}},loadBuffer:function(a,b){var c=function(b){return b&&this.tmpEvents.push(this.once("ready",b)),this.getArrayBuffer(a,this.loadArrayBuffer.bind(this))}.bind(this);return b?(this.backend.setPeaks(b),this.drawBuffer(),this.tmpEvents.push(this.once("interaction",c)),void 0):c()},loadMediaElement:function(a,b,c){var d=a;if("string"==typeof a)this.backend.load(d,this.mediaContainer,b,c);else{var e=a;this.backend.loadElt(e,b),d=e.src}this.tmpEvents.push(this.backend.once("canplay",function(){this.drawBuffer(),this.fireEvent("ready")}.bind(this)),this.backend.once("error",function(a){this.fireEvent("error",a)}.bind(this))),b&&this.backend.setPeaks(b),b&&!this.params.forceDecode||!this.backend.supportsWebAudio()||this.getArrayBuffer(d,function(a){this.decodeArrayBuffer(a,function(a){this.backend.buffer=a,this.backend.setPeaks(null),this.drawBuffer(),this.fireEvent("waveform-ready")}.bind(this))}.bind(this))},decodeArrayBuffer:function(a,b){this.arraybuffer=a,this.backend.decodeArrayBuffer(a,function(c){this.isDestroyed||this.arraybuffer!=a||(b(c),this.arraybuffer=null)}.bind(this),this.fireEvent.bind(this,"error","Error decoding audiobuffer"))},getArrayBuffer:function(b,c){var d=this,e=a.util.ajax({url:b,responseType:"arraybuffer"});return this.currentAjax=e,this.tmpEvents.push(e.on("progress",function(a){d.onProgress(a)}),e.on("success",function(a,b){c(a),d.currentAjax=null}),e.on("error",function(a){d.fireEvent("error","XHR error: "+a.target.statusText),d.currentAjax=null})),e},onProgress:function(a){if(a.lengthComputable)var b=a.loaded/a.total;else b=a.loaded/(a.loaded+1e6);this.fireEvent("loading",Math.round(100*b),a.target)},exportPCM:function(a,b,c){a=a||1024,b=b||1e4,c=c||!1;var d=this.backend.getPeaks(a,b),e=[].map.call(d,function(a){return Math.round(a*b)/b}),f=JSON.stringify(e);return c||window.open("data:application/json;charset=utf-8,"+encodeURIComponent(f)),f},exportImage:function(a,b){return a||(a="image/png"),b||(b=1),this.drawer.getImage(a,b)},cancelAjax:function(){this.currentAjax&&(this.currentAjax.xhr.abort(),this.currentAjax=null)},clearTmpEvents:function(){this.tmpEvents.forEach(function(a){a.un()})},empty:function(){this.backend.isPaused()||(this.stop(),this.backend.disconnectSource()),this.cancelAjax(),this.clearTmpEvents(),this.drawer.progress(0),this.drawer.setWidth(0),this.drawer.drawPeaks({length:this.drawer.getWidth()},0)},destroy:function(){this.fireEvent("destroy"),this.cancelAjax(),this.clearTmpEvents(),this.unAll(),this.backend.destroy(),this.drawer.destroy(),this.isDestroyed=!0}};return a.create=function(b){var c=Object.create(a);return c.init(b),c},a.util={extend:function(a){var b=Array.prototype.slice.call(arguments,1);return b.forEach(function(b){Object.keys(b).forEach(function(c){a[c]=b[c]})}),a},debounce:function(a,b,c){var d,e,f,g=function(){f=null,c||a.apply(e,d)};return function(){e=this,d=arguments;var h=c&&!f;clearTimeout(f),f=setTimeout(g,b),f||(f=setTimeout(g,b)),h&&a.apply(e,d)}},min:function(a){var b=+(1/0);for(var c in a)a[c]<b&&(b=a[c]);return b},max:function(a){var b=-(1/0);for(var c in a)a[c]>b&&(b=a[c]);return b},getId:function(){return"wavesurfer_"+Math.random().toString(32).substring(2)},ajax:function(b){var c=Object.create(a.Observer),d=new XMLHttpRequest,e=!1;return d.open(b.method||"GET",b.url,!0),d.responseType=b.responseType||"json",d.addEventListener("progress",function(a){c.fireEvent("progress",a),a.lengthComputable&&a.loaded==a.total&&(e=!0)}),d.addEventListener("load",function(a){e||c.fireEvent("progress",a),c.fireEvent("load",a),200==d.status||206==d.status?c.fireEvent("success",d.response,a):c.fireEvent("error",a)}),d.addEventListener("error",function(a){c.fireEvent("error",a)}),d.send(),c.xhr=d,c}},a.Observer={on:function(a,b){this.handlers||(this.handlers={});var c=this.handlers[a];return c||(c=this.handlers[a]=[]),c.push(b),{name:a,callback:b,un:this.un.bind(this,a,b)}},un:function(a,b){if(this.handlers){var c=this.handlers[a];if(c)if(b)for(var d=c.length-1;d>=0;d--)c[d]==b&&c.splice(d,1);else c.length=0}},unAll:function(){this.handlers=null},once:function(a,b){var c=this,d=function(){b.apply(this,arguments),setTimeout(function(){c.un(a,d)},0)};return this.on(a,d)},fireEvent:function(a){if(this.handlers){var b=this.handlers[a],c=Array.prototype.slice.call(arguments,1);b&&b.forEach(function(a){a.apply(null,c)})}}},a.util.extend(a,a.Observer),a.WebAudio={scriptBufferSize:256,PLAYING_STATE:0,PAUSED_STATE:1,FINISHED_STATE:2,supportsWebAudio:function(){return!(!window.AudioContext&&!window.webkitAudioContext)},getAudioContext:function(){return a.WebAudio.audioContext||(a.WebAudio.audioContext=new(window.AudioContext||window.webkitAudioContext)),a.WebAudio.audioContext},getOfflineAudioContext:function(b){return a.WebAudio.offlineAudioContext||(a.WebAudio.offlineAudioContext=new(window.OfflineAudioContext||window.webkitOfflineAudioContext)(1,2,b)),a.WebAudio.offlineAudioContext},init:function(b){this.params=b,this.ac=b.audioContext||this.getAudioContext(),this.lastPlay=this.ac.currentTime,this.startPosition=0,this.scheduledPause=null,this.states=[Object.create(a.WebAudio.state.playing),Object.create(a.WebAudio.state.paused),Object.create(a.WebAudio.state.finished)],this.createVolumeNode(),this.createScriptNode(),this.createAnalyserNode(),this.setState(this.PAUSED_STATE),this.setPlaybackRate(this.params.audioRate),this.setLength(0)},disconnectFilters:function(){this.filters&&(this.filters.forEach(function(a){a&&a.disconnect()}),this.filters=null,this.analyser.connect(this.gainNode))},setState:function(a){this.state!==this.states[a]&&(this.state=this.states[a],this.state.init.call(this))},setFilter:function(){this.setFilters([].slice.call(arguments))},setFilters:function(a){this.disconnectFilters(),a&&a.length&&(this.filters=a,this.analyser.disconnect(),a.reduce(function(a,b){return a.connect(b),b},this.analyser).connect(this.gainNode))},createScriptNode:function(){this.ac.createScriptProcessor?this.scriptNode=this.ac.createScriptProcessor(this.scriptBufferSize):this.scriptNode=this.ac.createJavaScriptNode(this.scriptBufferSize),this.scriptNode.connect(this.ac.destination)},addOnAudioProcess:function(){var a=this;this.scriptNode.onaudioprocess=function(){var b=a.getCurrentTime();b>=a.getDuration()?(a.setState(a.FINISHED_STATE),a.fireEvent("pause")):b>=a.scheduledPause?a.pause():a.state===a.states[a.PLAYING_STATE]&&a.fireEvent("audioprocess",b)}},removeOnAudioProcess:function(){this.scriptNode.onaudioprocess=null},createAnalyserNode:function(){this.analyser=this.ac.createAnalyser(),this.analyser.connect(this.gainNode)},createVolumeNode:function(){this.ac.createGain?this.gainNode=this.ac.createGain():this.gainNode=this.ac.createGainNode(),this.gainNode.connect(this.ac.destination)},setVolume:function(a){this.gainNode.gain.value=a},getVolume:function(){return this.gainNode.gain.value},decodeArrayBuffer:function(a,b,c){this.offlineAc||(this.offlineAc=this.getOfflineAudioContext(this.ac?this.ac.sampleRate:44100)),this.offlineAc.decodeAudioData(a,function(a){b(a)}.bind(this),c)},setPeaks:function(a){this.peaks=a},setLength:function(a){if(!this.mergedPeaks||a!=2*this.mergedPeaks.length-1+2){this.splitPeaks=[],this.mergedPeaks=[];for(var b=this.buffer?this.buffer.numberOfChannels:1,c=0;c<b;c++)this.splitPeaks[c]=[],this.splitPeaks[c][2*(a-1)]=0,this.splitPeaks[c][2*(a-1)+1]=0;this.mergedPeaks[2*(a-1)]=0,this.mergedPeaks[2*(a-1)+1]=0}},getPeaks:function(a,b,c){if(this.peaks)return this.peaks;this.setLength(a);for(var d=this.buffer.length/a,e=~~(d/10)||1,f=this.buffer.numberOfChannels,g=0;g<f;g++)for(var h=this.splitPeaks[g],i=this.buffer.getChannelData(g),j=b;j<=c;j++){for(var k=~~(j*d),l=~~(k+d),m=0,n=0,o=k;o<l;o+=e){var p=i[o];p>n&&(n=p),p<m&&(m=p)}h[2*j]=n,h[2*j+1]=m,(0==g||n>this.mergedPeaks[2*j])&&(this.mergedPeaks[2*j]=n),(0==g||m<this.mergedPeaks[2*j+1])&&(this.mergedPeaks[2*j+1]=m)}return this.params.splitChannels?this.splitPeaks:this.mergedPeaks},getPlayedPercents:function(){return this.state.getPlayedPercents.call(this)},disconnectSource:function(){this.source&&this.source.disconnect()},destroy:function(){this.isPaused()||this.pause(),this.unAll(),this.buffer=null,this.disconnectFilters(),this.disconnectSource(),this.gainNode.disconnect(),this.scriptNode.disconnect(),this.analyser.disconnect(),this.params.closeAudioContext&&("function"==typeof this.ac.close&&"closed"!=this.ac.state&&this.ac.close(),this.ac=null,this.params.audioContext?this.params.audioContext=null:a.WebAudio.audioContext=null,a.WebAudio.offlineAudioContext=null)},load:function(a){this.startPosition=0,this.lastPlay=this.ac.currentTime,this.buffer=a,this.createSource()},createSource:function(){this.disconnectSource(),this.source=this.ac.createBufferSource(),this.source.start=this.source.start||this.source.noteGrainOn,this.source.stop=this.source.stop||this.source.noteOff,this.source.playbackRate.value=this.playbackRate,this.source.buffer=this.buffer,this.source.connect(this.analyser)},isPaused:function(){return this.state!==this.states[this.PLAYING_STATE]},getDuration:function(){return this.buffer?this.buffer.duration:0},seekTo:function(a,b){if(this.buffer)return this.scheduledPause=null,null==a&&(a=this.getCurrentTime(),a>=this.getDuration()&&(a=0)),null==b&&(b=this.getDuration()),this.startPosition=a,this.lastPlay=this.ac.currentTime,this.state===this.states[this.FINISHED_STATE]&&this.setState(this.PAUSED_STATE),{start:a,end:b}},getPlayedTime:function(){return(this.ac.currentTime-this.lastPlay)*this.playbackRate},play:function(a,b){if(this.buffer){this.createSource();var c=this.seekTo(a,b);a=c.start,b=c.end,this.scheduledPause=b,this.source.start(0,a,b-a),"suspended"==this.ac.state&&this.ac.resume&&this.ac.resume(),this.setState(this.PLAYING_STATE),this.fireEvent("play")}},pause:function(){this.scheduledPause=null,this.startPosition+=this.getPlayedTime(),this.source&&this.source.stop(0),this.setState(this.PAUSED_STATE),this.fireEvent("pause")},getCurrentTime:function(){return this.state.getCurrentTime.call(this)},getPlaybackRate:function(){return this.playbackRate},setPlaybackRate:function(a){a=a||1,this.isPaused()?this.playbackRate=a:(this.pause(),this.playbackRate=a,this.play())}},a.WebAudio.state={},a.WebAudio.state.playing={init:function(){this.addOnAudioProcess()},getPlayedPercents:function(){var a=this.getDuration();return this.getCurrentTime()/a||0},getCurrentTime:function(){return this.startPosition+this.getPlayedTime()}},a.WebAudio.state.paused={init:function(){this.removeOnAudioProcess()},getPlayedPercents:function(){var a=this.getDuration();return this.getCurrentTime()/a||0},getCurrentTime:function(){return this.startPosition}},a.WebAudio.state.finished={init:function(){this.removeOnAudioProcess(),this.fireEvent("finish")},getPlayedPercents:function(){return 1},getCurrentTime:function(){return this.getDuration()}},a.util.extend(a.WebAudio,a.Observer),a.MediaElement=Object.create(a.WebAudio),a.util.extend(a.MediaElement,{init:function(a){this.params=a,this.media={currentTime:0,duration:0,paused:!0,playbackRate:1,play:function(){},pause:function(){}},this.mediaType=a.mediaType.toLowerCase(),this.elementPosition=a.elementPosition,this.setPlaybackRate(this.params.audioRate),this.createTimer()},createTimer:function(){var a=this,b=function(){if(!a.isPaused()){a.fireEvent("audioprocess",a.getCurrentTime());var c=window.requestAnimationFrame||window.webkitRequestAnimationFrame;c(b)}};this.on("play",b)},load:function(a,b,c,d){var e=document.createElement(this.mediaType);e.controls=this.params.mediaControls,e.autoplay=this.params.autoplay||!1,e.preload=null==d?"auto":d,e.src=a,e.style.width="100%";var f=b.querySelector(this.mediaType);f&&b.removeChild(f),b.appendChild(e),this._load(e,c)},loadElt:function(a,b){var c=a;c.controls=this.params.mediaControls,c.autoplay=this.params.autoplay||!1,this._load(c,b)},_load:function(a,b){var c=this;"function"==typeof a.load&&a.load(),a.addEventListener("error",function(){c.fireEvent("error","Error loading media element")}),a.addEventListener("canplay",function(){c.fireEvent("canplay")}),a.addEventListener("ended",function(){c.fireEvent("finish")}),this.media=a,this.peaks=b,this.onPlayEnd=null,this.buffer=null,this.setPlaybackRate(this.playbackRate)},isPaused:function(){return!this.media||this.media.paused},getDuration:function(){var a=(this.buffer||this.media).duration;return a>=1/0&&(a=this.media.seekable.end(0)),a},getCurrentTime:function(){return this.media&&this.media.currentTime},getPlayedPercents:function(){return this.getCurrentTime()/this.getDuration()||0},getPlaybackRate:function(){return this.playbackRate||this.media.playbackRate},setPlaybackRate:function(a){this.playbackRate=a||1,this.media.playbackRate=this.playbackRate},seekTo:function(a){null!=a&&(this.media.currentTime=a),this.clearPlayEnd()},play:function(a,b){this.seekTo(a),this.media.play(),b&&this.setPlayEnd(b),this.fireEvent("play")},pause:function(){this.media&&this.media.pause(),this.clearPlayEnd(),this.fireEvent("pause")},setPlayEnd:function(a){var b=this;this.onPlayEnd=function(c){c>=a&&(b.pause(),b.seekTo(a))},this.on("audioprocess",this.onPlayEnd)},clearPlayEnd:function(){this.onPlayEnd&&(this.un("audioprocess",this.onPlayEnd),this.onPlayEnd=null)},getPeaks:function(b,c,d){return this.buffer?a.WebAudio.getPeaks.call(this,b,c,d):this.peaks||[]},getVolume:function(){return this.media.volume},setVolume:function(a){this.media.volume=a},destroy:function(){this.pause(),this.unAll(),this.media&&this.media.parentNode&&this.media.parentNode.removeChild(this.media),this.media=null}}),a.AudioElement=a.MediaElement,a.Drawer={init:function(a,b){this.container=a,this.params=b,this.width=0,this.height=b.height*this.params.pixelRatio,this.lastPos=0,this.initDrawer(b),this.createWrapper(),this.createElements()},createWrapper:function(){this.wrapper=this.container.appendChild(document.createElement("wave")),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%",overflowX:this.params.hideScrollbar?"hidden":"auto",overflowY:"hidden"}),this.setupWrapperEvents()},handleEvent:function(a,b){!b&&a.preventDefault();var c,d=a.targetTouches?a.targetTouches[0].clientX:a.clientX,e=this.wrapper.getBoundingClientRect(),f=this.width,g=this.getWidth();return!this.params.fillParent&&f<g?(c=(d-e.left)*this.params.pixelRatio/f||0,c>1&&(c=1)):c=(d-e.left+this.wrapper.scrollLeft)/this.wrapper.scrollWidth||0,c},setupWrapperEvents:function(){var a=this;this.wrapper.addEventListener("click",function(b){var c=a.wrapper.offsetHeight-a.wrapper.clientHeight;if(0!=c){var d=a.wrapper.getBoundingClientRect();if(b.clientY>=d.bottom-c)return}a.params.interact&&a.fireEvent("click",b,a.handleEvent(b))}),this.wrapper.addEventListener("scroll",function(b){a.fireEvent("scroll",b)})},drawPeaks:function(a,b,c,d){this.setWidth(b),this.params.barWidth?this.drawBars(a,0,c,d):this.drawWave(a,0,c,d)},style:function(a,b){return Object.keys(b).forEach(function(c){a.style[c]!==b[c]&&(a.style[c]=b[c])}),a},resetScroll:function(){null!==this.wrapper&&(this.wrapper.scrollLeft=0)},recenter:function(a){var b=this.wrapper.scrollWidth*a;this.recenterOnPosition(b,!0)},recenterOnPosition:function(a,b){var c=this.wrapper.scrollLeft,d=~~(this.wrapper.clientWidth/2),e=a-d,f=e-c,g=this.wrapper.scrollWidth-this.wrapper.clientWidth;if(0!=g){if(!b&&-d<=f&&f<d){var h=5;f=Math.max(-h,Math.min(h,f)),e=c+f}e=Math.max(0,Math.min(g,e)),e!=c&&(this.wrapper.scrollLeft=e)}},getScrollX:function(){return Math.round(this.wrapper.scrollLeft*this.params.pixelRatio)},getWidth:function(){return Math.round(this.container.clientWidth*this.params.pixelRatio)},setWidth:function(a){this.width!=a&&(this.width=a,this.params.fillParent||this.params.scrollParent?this.style(this.wrapper,{width:""}):this.style(this.wrapper,{width:~~(this.width/this.params.pixelRatio)+"px"}),this.updateSize())},setHeight:function(a){a!=this.height&&(this.height=a,this.style(this.wrapper,{height:~~(this.height/this.params.pixelRatio)+"px"}),this.updateSize())},progress:function(a){var b=1/this.params.pixelRatio,c=Math.round(a*this.width)*b;if(c<this.lastPos||c-this.lastPos>=b){if(this.lastPos=c,this.params.scrollParent&&this.params.autoCenter){var d=~~(this.wrapper.scrollWidth*a);this.recenterOnPosition(d)}this.updateProgress(c)}},destroy:function(){this.unAll(),this.wrapper&&(this.container.removeChild(this.wrapper),this.wrapper=null)},initDrawer:function(){},createElements:function(){},updateSize:function(){},drawWave:function(a,b){},clearWave:function(){},updateProgress:function(a){}},a.util.extend(a.Drawer,a.Observer),a.Drawer.Canvas=Object.create(a.Drawer),a.util.extend(a.Drawer.Canvas,{createElements:function(){var a=this.wrapper.appendChild(this.style(document.createElement("canvas"),{position:"absolute",zIndex:1,left:0,top:0,bottom:0}));if(this.waveCc=a.getContext("2d"),this.progressWave=this.wrapper.appendChild(this.style(document.createElement("wave"),{position:"absolute",zIndex:2,left:0,top:0,bottom:0,overflow:"hidden",width:"0",display:"none",boxSizing:"border-box",borderRightStyle:"solid",borderRightWidth:this.params.cursorWidth+"px",borderRightColor:this.params.cursorColor})),this.params.waveColor!=this.params.progressColor){var b=this.progressWave.appendChild(document.createElement("canvas"));this.progressCc=b.getContext("2d")}},updateSize:function(){var a=Math.round(this.width/this.params.pixelRatio);this.waveCc.canvas.width=this.width,this.waveCc.canvas.height=this.height,this.style(this.waveCc.canvas,{width:a+"px"}),this.style(this.progressWave,{display:"block"}),this.progressCc&&(this.progressCc.canvas.width=this.width,this.progressCc.canvas.height=this.height,this.style(this.progressCc.canvas,{width:a+"px"})),this.clearWave()},clearWave:function(){this.waveCc.clearRect(0,0,this.width,this.height),this.progressCc&&this.progressCc.clearRect(0,0,this.width,this.height)},drawBars:function(b,c,d,e){var f=this;if(b[0]instanceof Array){var g=b;if(this.params.splitChannels)return this.setHeight(g.length*this.params.height*this.params.pixelRatio),void g.forEach(function(a,b){f.drawBars(a,b,d,e)});b=g[0]}var h=[].some.call(b,function(a){return a<0}),i=1;h&&(i=2);var j=.5/this.params.pixelRatio,k=this.width,l=this.params.height*this.params.pixelRatio,m=l*c||0,n=l/2,o=b.length/i,p=this.params.barWidth*this.params.pixelRatio,q=Math.max(this.params.pixelRatio,~~(p/2)),r=p+q,s=1/this.params.barHeight;if(this.params.normalize){var t=a.util.max(b),u=a.util.min(b);s=-u>t?-u:t}var v=o/k;this.waveCc.fillStyle=this.params.waveColor,this.progressCc&&(this.progressCc.fillStyle=this.params.progressColor),[this.waveCc,this.progressCc].forEach(function(a){if(a)for(var c=d/v;c<e/v;c+=r){var f=b[Math.floor(c*v*i)]||0,g=Math.round(f/s*n);a.fillRect(c+j,n-g+m,p+j,2*g)}},this)},drawWave:function(b,c,d,e){var f=this;if(b[0]instanceof Array){var g=b;if(this.params.splitChannels)return this.setHeight(g.length*this.params.height*this.params.pixelRatio),void g.forEach(function(a,b){f.drawWave(a,b,d,e)});b=g[0]}var h=[].some.call(b,function(a){return a<0});if(!h){for(var i=[],j=0,k=b.length;j<k;j++)i[2*j]=b[j],i[2*j+1]=-b[j];b=i}var l=.5/this.params.pixelRatio,m=this.params.height*this.params.pixelRatio,n=m*c||0,o=m/2,p=~~(b.length/2),q=1;this.params.fillParent&&this.width!=p&&(q=this.width/p);var r=1/this.params.barHeight;if(this.params.normalize){var s=a.util.max(b),t=a.util.min(b);r=-t>s?-t:s}this.waveCc.fillStyle=this.params.waveColor,this.progressCc&&(this.progressCc.fillStyle=this.params.progressColor),[this.waveCc,this.progressCc].forEach(function(a){if(a){a.beginPath(),a.moveTo(d*q+l,o+n);for(var c=d;c<e;c++){var f=Math.round(b[2*c]/r*o);a.lineTo(c*q+l,o-f+n)}for(var c=e-1;c>=d;c--){var f=Math.round(b[2*c+1]/r*o);a.lineTo(c*q+l,o-f+n)}a.closePath(),a.fill(),a.fillRect(0,o+n-l,this.width,l)}},this)},updateProgress:function(a){this.style(this.progressWave,{width:a+"px"})},getImage:function(a,b){return this.waveCc.canvas.toDataURL(a,b)}}),a.Drawer.MultiCanvas=Object.create(a.Drawer),a.util.extend(a.Drawer.MultiCanvas,{initDrawer:function(a){if(this.maxCanvasWidth=null!=a.maxCanvasWidth?a.maxCanvasWidth:4e3,this.maxCanvasElementWidth=Math.round(this.maxCanvasWidth/this.params.pixelRatio),this.maxCanvasWidth<=1)throw"maxCanvasWidth must be greater than 1.";if(this.maxCanvasWidth%2==1)throw"maxCanvasWidth must be an even number.";this.hasProgressCanvas=this.params.waveColor!=this.params.progressColor,this.halfPixel=.5/this.params.pixelRatio,this.canvases=[]},createElements:function(){this.progressWave=this.wrapper.appendChild(this.style(document.createElement("wave"),{position:"absolute",zIndex:2,left:0,top:0,bottom:0,overflow:"hidden",width:"0",display:"none",boxSizing:"border-box",borderRightStyle:"solid",borderRightWidth:this.params.cursorWidth+"px",borderRightColor:this.params.cursorColor})),this.addCanvas()},updateSize:function(){for(var a=Math.round(this.width/this.params.pixelRatio),b=Math.ceil(a/this.maxCanvasElementWidth);this.canvases.length<b;)this.addCanvas();for(;this.canvases.length>b;)this.removeCanvas();for(var c in this.canvases){var d=this.maxCanvasWidth+2*Math.ceil(this.params.pixelRatio/2);c==this.canvases.length-1&&(d=this.width-this.maxCanvasWidth*(this.canvases.length-1)),this.updateDimensions(this.canvases[c],d,this.height),this.clearWaveForEntry(this.canvases[c])}},addCanvas:function(){var a={},b=this.maxCanvasElementWidth*this.canvases.length;a.wave=this.wrapper.appendChild(this.style(document.createElement("canvas"),{position:"absolute",zIndex:1,left:b+"px",top:0,bottom:0,height:"100%"})),a.waveCtx=a.wave.getContext("2d"),this.hasProgressCanvas&&(a.progress=this.progressWave.appendChild(this.style(document.createElement("canvas"),{position:"absolute",left:b+"px",top:0,bottom:0,height:"100%"})),a.progressCtx=a.progress.getContext("2d")),this.canvases.push(a)},removeCanvas:function(){var a=this.canvases.pop();a.wave.parentElement.removeChild(a.wave),this.hasProgressCanvas&&a.progress.parentElement.removeChild(a.progress)},updateDimensions:function(a,b,c){var d=Math.round(b/this.params.pixelRatio),e=Math.round(this.width/this.params.pixelRatio);a.start=a.waveCtx.canvas.offsetLeft/e||0,a.end=a.start+d/e,a.waveCtx.canvas.width=b,a.waveCtx.canvas.height=c,this.style(a.waveCtx.canvas,{width:d+"px"}),this.style(this.progressWave,{display:"block"}),this.hasProgressCanvas&&(a.progressCtx.canvas.width=b,a.progressCtx.canvas.height=c,this.style(a.progressCtx.canvas,{width:d+"px"}))},clearWave:function(){for(var a in this.canvases)this.clearWaveForEntry(this.canvases[a])},clearWaveForEntry:function(a){a.waveCtx.clearRect(0,0,a.waveCtx.canvas.width,a.waveCtx.canvas.height),this.hasProgressCanvas&&a.progressCtx.clearRect(0,0,a.progressCtx.canvas.width,a.progressCtx.canvas.height)},drawBars:function(b,c,d,e){var f=this;if(b[0]instanceof Array){var g=b;if(this.params.splitChannels)return this.setHeight(g.length*this.params.height*this.params.pixelRatio),void g.forEach(function(a,b){f.drawBars(a,b,d,e)});b=g[0]}var h=[].some.call(b,function(a){return a<0}),i=1;h&&(i=2);var j=this.width,k=this.params.height*this.params.pixelRatio,l=k*c||0,m=k/2,n=b.length/i,o=this.params.barWidth*this.params.pixelRatio,p=Math.max(this.params.pixelRatio,~~(o/2)),q=o+p,r=1/this.params.barHeight;if(this.params.normalize){var s=a.util.max(b),t=a.util.min(b);r=-t>s?-t:s}for(var u=n/j,v=d/u;v<e/u;v+=q){var w=b[Math.floor(v*u*i)]||0,x=Math.round(w/r*m);this.fillRect(v+this.halfPixel,m-x+l,o+this.halfPixel,2*x)}},drawWave:function(b,c,d,e){var f=this;if(b[0]instanceof Array){var g=b;if(this.params.splitChannels)return this.setHeight(g.length*this.params.height*this.params.pixelRatio),void g.forEach(function(a,b){f.drawWave(a,b,d,e)});b=g[0]}var h=[].some.call(b,function(a){return a<0});if(!h){for(var i=[],j=0,k=b.length;j<k;j++)i[2*j]=b[j],i[2*j+1]=-b[j];b=i}var l=this.params.height*this.params.pixelRatio,m=l*c||0,n=l/2,o=1/this.params.barHeight;if(this.params.normalize){var p=a.util.max(b),q=a.util.min(b);o=-q>p?-q:p}this.drawLine(b,o,n,m,d,e),this.fillRect(0,n+m-this.halfPixel,this.width,this.halfPixel)},drawLine:function(a,b,c,d,e,f){for(var g in this.canvases){var h=this.canvases[g];this.setFillStyles(h),this.drawLineToContext(h,h.waveCtx,a,b,c,d,e,f),this.drawLineToContext(h,h.progressCtx,a,b,c,d,e,f)}},drawLineToContext:function(a,b,c,d,e,f,g,h){if(b){var i=c.length/2,j=1;this.params.fillParent&&this.width!=i&&(j=this.width/i);var k=Math.round(i*a.start),l=Math.round(i*a.end);if(!(k>h||l<g)){var m=Math.max(k,g),n=Math.min(l,h);b.beginPath(),b.moveTo((m-k)*j+this.halfPixel,e+f);for(var o=m;o<n;o++){var p=c[2*o]||0,q=Math.round(p/d*e);b.lineTo((o-k)*j+this.halfPixel,e-q+f)}for(var o=n-1;o>=m;o--){var p=c[2*o+1]||0,q=Math.round(p/d*e);b.lineTo((o-k)*j+this.halfPixel,e-q+f)}b.closePath(),b.fill()}}},fillRect:function(a,b,c,d){for(var e=Math.floor(a/this.maxCanvasWidth),f=Math.min(Math.ceil((a+c)/this.maxCanvasWidth)+1,this.canvases.length),g=e;g<f;g++){var h=this.canvases[g],i=g*this.maxCanvasWidth,j={x1:Math.max(a,g*this.maxCanvasWidth),y1:b,x2:Math.min(a+c,g*this.maxCanvasWidth+h.waveCtx.canvas.width),y2:b+d};j.x1<j.x2&&(this.setFillStyles(h),this.fillRectToContext(h.waveCtx,j.x1-i,j.y1,j.x2-j.x1,j.y2-j.y1),this.fillRectToContext(h.progressCtx,j.x1-i,j.y1,j.x2-j.x1,j.y2-j.y1))}},fillRectToContext:function(a,b,c,d,e){a&&a.fillRect(b,c,d,e)},setFillStyles:function(a){a.waveCtx.fillStyle=this.params.waveColor,this.hasProgressCanvas&&(a.progressCtx.fillStyle=this.params.progressColor)},updateProgress:function(a){this.style(this.progressWave,{width:a+"px"})},getImage:function(a,b){var c=[];return this.canvases.forEach(function(d){c.push(d.wave.toDataURL(a,b))}),c.length>1?c:c[0]}}),a.Drawer.SplitWavePointPlot=Object.create(a.Drawer.Canvas),a.util.extend(a.Drawer.SplitWavePointPlot,{defaultPlotParams:{plotNormalizeTo:"whole",plotTimeStart:0,plotMin:0,
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plotMax:1,plotColor:"#f63",plotProgressColor:"#F00",plotPointHeight:2,plotPointWidth:2,plotSeparator:!0,plotSeparatorColor:"black",plotRangeDisplay:!1,plotRangeUnits:"",plotRangePrecision:4,plotRangeIgnoreOutliers:!1,plotRangeFontSize:12,plotRangeFontType:"Ariel",waveDrawMedianLine:!0,plotFileDelimiter:"\t"},plotTimeStart:0,plotTimeEnd:-1,plotArrayLoaded:!1,plotArray:[],plotPoints:[],plotMin:0,plotMax:1,initDrawer:function(a){var b=this;for(var c in this.defaultPlotParams)void 0===this.params[c]&&(this.params[c]=this.defaultPlotParams[c]);if(this.plotTimeStart=this.params.plotTimeStart,void 0!==this.params.plotTimeEnd&&(this.plotTimeEnd=this.params.plotTimeEnd),Array.isArray(a.plotArray))this.plotArray=a.plotArray,this.plotArrayLoaded=!0;else{var d=function(a){b.plotArray=a,b.plotArrayLoaded=!0,b.fireEvent("plot_array_loaded")};this.loadPlotArrayFromFile(a.plotFileUrl,d,this.params.plotFileDelimiter)}},drawPeaks:function(a,b,c,d){if(1==this.plotArrayLoaded)this.setWidth(b),this.splitChannels=!0,this.params.height=this.params.height/2,a[0]instanceof Array&&(a=a[0]),this.params.barWidth?this.drawBars(a,1,c,d):this.drawWave(a,1,c,d),this.params.height=2*this.params.height,this.calculatePlots(),this.drawPlots();else{var e=this;e.on("plot-array-loaded",function(){e.drawPeaks(a,b,c,d)})}},drawPlots:function(){var a=this.params.height*this.params.pixelRatio/2,b=.5/this.params.pixelRatio;this.waveCc.fillStyle=this.params.plotColor,this.progressCc&&(this.progressCc.fillStyle=this.params.plotProgressColor);for(var c in this.plotPoints){var d=parseInt(c),e=a-this.params.plotPointHeight-this.plotPoints[c]*(a-this.params.plotPointHeight),f=this.params.plotPointHeight;this.waveCc.fillRect(d,e,this.params.plotPointWidth,f),this.progressCc&&this.progressCc.fillRect(d,e,this.params.plotPointWidth,f)}this.params.plotSeparator&&(this.waveCc.fillStyle=this.params.plotSeparatorColor,this.waveCc.fillRect(0,a,this.width,b)),this.params.plotRangeDisplay&&this.displayPlotRange()},displayPlotRange:function(){var a=this.params.plotRangeFontSize*this.params.pixelRatio,b=this.plotMax.toPrecision(this.params.plotRangePrecision)+" "+this.params.plotRangeUnits,c=this.plotMin.toPrecision(this.params.plotRangePrecision)+" "+this.params.plotRangeUnits;this.waveCc.font=a.toString()+"px "+this.params.plotRangeFontType,this.waveCc.fillText(b,3,a),this.waveCc.fillText(c,3,this.height/2)},calculatePlots:function(){this.plotPoints={},this.calculatePlotTimeEnd();for(var a=[],b=-1,c=0,d=99999999999999,e=0,f=99999999999999,g=this.plotTimeEnd-this.plotTimeStart,h=0;h<this.plotArray.length;h++){var i=this.plotArray[h];if(i.value>c&&(c=i.value),i.value<d&&(d=i.value),i.time>=this.plotTimeStart&&i.time<=this.plotTimeEnd){var j=Math.round(this.width*(i.time-this.plotTimeStart)/g);if(a.push(i.value),j!==b&&a.length>0){var k=this.avg(a);k>e&&(e=k),k<f&&(f=k),this.plotPoints[b]=k,a=[]}b=j}}"whole"==this.params.plotNormalizeTo?(this.plotMin=d,this.plotMax=c):"values"==this.params.plotNormalizeTo?(this.plotMin=this.params.plotMin,this.plotMax=this.params.plotMax):(this.plotMin=f,this.plotMax=e),this.normalizeValues()},normalizeValues:function(){var a={};if("none"!==this.params.plotNormalizeTo){for(var b in this.plotPoints){var c=(this.plotPoints[b]-this.plotMin)/(this.plotMax-this.plotMin);c>1?this.params.plotRangeIgnoreOutliers||(a[b]=1):c<0?this.params.plotRangeIgnoreOutliers||(a[b]=0):a[b]=c}this.plotPoints=a}},loadPlotArrayFromFile:function(b,c,d){void 0===d&&(d="\t");var e=[],f={url:b,responseType:"text"},g=a.util.ajax(f);g.on("load",function(a){if(200==a.currentTarget.status){for(var b=a.currentTarget.responseText.split("\n"),f=0;f<b.length;f++){var g=b[f].split(d);2==g.length&&e.push({time:parseFloat(g[0]),value:parseFloat(g[1])})}c(e)}})},calculatePlotTimeEnd:function(){void 0!==this.params.plotTimeEnd?this.plotTimeEnd=this.params.plotTimeEnd:this.plotTimeEnd=this.plotArray[this.plotArray.length-1].time},avg:function(a){var b=a.reduce(function(a,b){return a+b});return b/a.length}}),a.util.extend(a.Drawer.SplitWavePointPlot,a.Observer),a.PeakCache={init:function(){this.clearPeakCache()},clearPeakCache:function(){this.peakCacheRanges=[],this.peakCacheLength=-1},addRangeToPeakCache:function(a,b,c){a!=this.peakCacheLength&&(this.clearPeakCache(),this.peakCacheLength=a);for(var d=[],e=0;e<this.peakCacheRanges.length&&this.peakCacheRanges[e]<b;)e++;for(e%2==0&&d.push(b);e<this.peakCacheRanges.length&&this.peakCacheRanges[e]<=c;)d.push(this.peakCacheRanges[e]),e++;e%2==0&&d.push(c),d=d.filter(function(a,b,c){return 0==b?a!=c[b+1]:b==c.length-1?a!=c[b-1]:a!=c[b-1]&&a!=c[b+1]}),this.peakCacheRanges=this.peakCacheRanges.concat(d),this.peakCacheRanges=this.peakCacheRanges.sort(function(a,b){return a-b}).filter(function(a,b,c){return 0==b?a!=c[b+1]:b==c.length-1?a!=c[b-1]:a!=c[b-1]&&a!=c[b+1]});var f=[];for(e=0;e<d.length;e+=2)f.push([d[e],d[e+1]]);return f},getCacheRanges:function(){for(var a=[],b=0;b<this.peakCacheRanges.length;b+=2)a.push([this.peakCacheRanges[b],this.peakCacheRanges[b+1]]);return a}},function(){var b=function(){var b=document.querySelectorAll("wavesurfer");Array.prototype.forEach.call(b,function(b){var c=a.util.extend({container:b,backend:"MediaElement",mediaControls:!0},b.dataset);b.style.display="block";var d=a.create(c);if(b.dataset.peaks)var e=JSON.parse(b.dataset.peaks);d.load(b.dataset.url,e)})};"complete"===document.readyState?b():window.addEventListener("load",b)}(),a});
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//# sourceMappingURL=wavesurfer.min.js.map
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