static/js/WebAudioRecorder.min.js

(function(n){var e=function(){var i=arguments[0],t=[].slice.call(arguments,1);for(var n=0;n<t.length;++n){var r=t[n];for(key in r){var o=r[key];i[key]=typeof o==="object"?e(typeof i[key]==="object"?i[key]:{},o):o}}return i};var o={wav:"WebAudioRecorderWav.min.js",ogg:"WebAudioRecorderOgg.min.js",mp3:"WebAudioRecorderMp3.min.js"};var t={workerDir:"/",numChannels:2,encoding:"wav",options:{timeLimit:300,encodeAfterRecord:false,progressInterval:1e3,bufferSize:undefined,wav:{mimeType:"audio/wav"},ogg:{mimeType:"audio/ogg",quality:.5},mp3:{mimeType:"audio/mpeg",bitRate:160}}};var i=function(i,n){e(this,t,n||{});this.context=i.context;if(this.context.createScriptProcessor==null)this.context.createScriptProcessor=this.context.createJavaScriptNode;this.input=this.context.createGain();i.connect(this.input);this.buffer=[];this.initWorker()};e(i.prototype,{isRecording:function(){return this.processor!=null},setEncoding:function(e){if(this.isRecording())this.error("setEncoding: cannot set encoding during recording");else if(this.encoding!==e){this.encoding=e;this.initWorker()}},setOptions:function(i){if(this.isRecording())this.error("setOptions: cannot set options during recording");else{e(this.options,i);this.worker.postMessage({command:"options",options:this.options})}},startRecording:function(){if(this.isRecording())this.error("startRecording: previous recording is running");else{var i=this.numChannels,e=this.buffer,n=this.worker;this.processor=this.context.createScriptProcessor(this.options.bufferSize,this.numChannels,this.numChannels);this.input.connect(this.processor);this.processor.connect(this.context.destination);this.processor.onaudioprocess=function(t){for(var o=0;o<i;++o)e[o]=t.inputBuffer.getChannelData(o);n.postMessage({command:"record",buffer:e})};this.worker.postMessage({command:"start",bufferSize:this.processor.bufferSize});this.startTime=Date.now()}},recordingTime:function(){return this.isRecording()?(Date.now()-this.startTime)*.001:null},cancelRecording:function(){if(this.isRecording()){this.isRecording=false;this.input.disconnect();this.processor.disconnect();delete this.processor;this.worker.postMessage({command:"cancel"})}},finishRecording:function(){if(this.isRecording()){this.isRecording=false;this.input.disconnect();this.processor.disconnect();delete this.processor;this.worker.postMessage({command:"finish"})}},onTimeout:function(e){this.onTimeout=e},onEncodingProgress:function(e){this.onEncodingProgress=e},onComplete:function(e){this.onComplete=e},onError:function(e){this.onError=e},initWorker:function(){if(this.worker!=null)this.worker.terminate();var i=o[this.encoding];if(i==null)this.error("unsupported encoding");else{var t=this;this.worker=new Worker(this.workerDir+i);this.worker.onmessage=function(i){var n=i.data;switch(n.command){case"timeout":t.onTimeout(t);break;case"progress":t.onEncodingProgress(t,n.progress);break;case"complete":t.onComplete(t,n.blob);break;case"error":t.onError(t,n.message)}};this.worker.postMessage({command:"init",config:{sampleRate:this.context.sampleRate,numChannels:this.numChannels},options:this.options})}},error:function(e){if(this.onError==null)throw new Error(e);this.onError(this,e)}});n.WebAudioRecorder=i})(self);