tweb/public/t4/recorder.min.js

!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define([],t):"object"==typeof exports?exports.Recorder=t():e.Recorder=t()}("undefined"!=typeof self?self:this,(function(){return function(e){var t={};function o(i){if(t[i])return t[i].exports;var n=t[i]={i:i,l:!1,exports:{}};return e[i].call(n.exports,n,n.exports,o),n.l=!0,n.exports}return o.m=e,o.c=t,o.d=function(e,t,i){o.o(e,t)||Object.defineProperty(e,t,{enumerable:!0,get:i})},o.r=function(e){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"__esModule",{value:!0})},o.t=function(e,t){if(1&t&&(e=o(e)),8&t)return e;if(4&t&&"object"==typeof e&&e&&e.__esModule)return e;var i=Object.create(null);if(o.r(i),Object.defineProperty(i,"default",{enumerable:!0,value:e}),2&t&&"string"!=typeof e)for(var n in e)o.d(i,n,function(t){return e[t]}.bind(null,n));return i},o.n=function(e){var t=e&&e.__esModule?function(){return e.default}:function(){return e};return o.d(t,"a",t),t},o.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},o.p="",o(o.s=0)}([function(e,t,o){"use strict";(function(t){var o=t.AudioContext||t.webkitAudioContext,i=function(e){if(!i.isRecordingSupported())throw new Error("Recording is not supported in this browser");e||(e={}),this.state="inactive",this.config=Object.assign({bufferLength:4096,encoderApplication:2049,encoderFrameSize:20,encoderPath:"encoderWorker.min.js",encoderSampleRate:48e3,maxFramesPerPage:40,mediaTrackConstraints:!0,monitorGain:0,numberOfChannels:1,recordingGain:1,resampleQuality:3,streamPages:!1,reuseWorker:!1,wavBitDepth:16},e),this.encodedSamplePosition=0};i.isRecordingSupported=function(){return o&&t.navigator&&t.navigator.mediaDevices&&t.navigator.mediaDevices.getUserMedia&&t.WebAssembly},i.prototype.clearStream=function(){this.stream&&(this.stream.getTracks?this.stream.getTracks().forEach((function(e){e.stop()})):this.stream.stop(),delete this.stream),this.audioContext&&this.closeAudioContext&&(this.audioContext.close(),delete this.audioContext)},i.prototype.encodeBuffers=function(e){if("recording"===this.state){for(var t=[],o=0;o<e.numberOfChannels;o++)t[o]=e.getChannelData(o);this.encoder.postMessage({command:"encode",buffers:t})}},i.prototype.initAudioContext=function(e){return e&&e.context?(this.audioContext=e.context,this.closeAudioContext=!1):(this.audioContext=new o,this.closeAudioContext=!0),this.audioContext},i.prototype.initAudioGraph=function(){this.encodeBuffers=function(){delete this.encodeBuffers},this.scriptProcessorNode=this.audioContext.createScriptProcessor(this.config.bufferLength,this.config.numberOfChannels,this.config.numberOfChannels),this.scriptProcessorNode.connect(this.audioContext.destination),this.scriptProcessorNode.onaudioprocess=e=>{this.encodeBuffers(e.inputBuffer)},this.monitorGainNode=this.audioContext.createGain(),this.setMonitorGain(this.config.monitorGain),this.monitorGainNode.connect(this.audioContext.destination),this.recordingGainNode=this.audioContext.createGain(),this.setRecordingGain(this.config.recordingGain),this.recordingGainNode.connect(this.scriptProcessorNode)},i.prototype.initSourceNode=function(e){return e&&e.context?t.Promise.resolve(e):t.navigator.mediaDevices.getUserMedia({audio:this.config.mediaTrackConstraints}).then(e=>(this.stream=e,this.audioContext.createMediaStreamSource(e)))},i.prototype.loadWorker=function(){this.encoder||(this.encoder=new t.Worker(this.config.encoderPath))},i.prototype.initWorker=function(){var e=(this.config.streamPages?this.streamPage:this.storePage).bind(this);return this.recordedPages=[],this.totalLength=0,this.loadWorker(),new Promise((t,o)=>{var i=o=>{switch(o.data.message){case"ready":t();break;case"page":this.encodedSamplePosition=o.data.samplePosition,e(o.data.page);break;case"done":this.encoder.removeEventListener("message",i),this.finish()}};this.encoder.addEventListener("message",i),this.encoder.postMessage(Object.assign({command:"init",originalSampleRate:this.audioContext.sampleRate,wavSampleRate:this.audioContext.sampleRate},this.config))})},i.prototype.pause=function(e){if("recording"===this.state){if(this.state="paused",e&&this.config.streamPages){var t=this.encoder;return new Promise((e,o)=>{var i=o=>{"flushed"===o.data.message&&(t.removeEventListener("message",i),this.onpause(),e())};t.addEventListener("message",i),t.postMessage({command:"flush"})})}return this.onpause(),Promise.resolve()}},i.prototype.resume=function(){"paused"===this.state&&(this.state="recording",this.onresume())},i.prototype.setRecordingGain=function(e){this.config.recordingGain=e,this.recordingGainNode&&this.audioContext&&this.recordingGainNode.gain.setTargetAtTime(e,this.audioContext.currentTime,.01)},i.prototype.setMonitorGain=function(e){this.config.monitorGain=e,this.monitorGainNode&&this.audioContext&&this.monitorGainNode.gain.setTargetAtTime(e,this.audioContext.currentTime,.01)},i.prototype.start=function(e){if("inactive"===this.state)return this.initAudioContext(e),this.initAudioGraph(),this.encodedSamplePosition=0,this.initWorker().then(()=>this.initSourceNode(e)).then(e=>{this.sourceNode=e,this.state="recording",this.onstart(),this.encoder.postMessage({command:"getHeaderPages"}),this.sourceNode.connect(this.monitorGainNode),this.sourceNode.connect(this.recordingGainNode)})},i.prototype.stop=function(){if("inactive"!==this.state){this.state="inactive",this.monitorGainNode.disconnect(),this.scriptProcessorNode.disconnect(),this.recordingGainNode.disconnect(),this.sourceNode.disconnect(),this.clearStream();var e=this.encoder;return new Promise(t=>{var o=i=>{"done"===i.data.message&&(e.removeEventListener("message",o),t())};e.addEventListener("message",o),e.postMessage({command:"done"}),this.config.reuseWorker||e.postMessage({command:"close"})})}return Promise.resolve()},i.prototype.destroyWorker=function(){"inactive"===this.state&&this.encoder&&(this.encoder.postMessage({command:"close"}),delete this.encoder)},i.prototype.storePage=function(e){this.recordedPages.push(e),this.totalLength+=e.length},i.prototype.streamPage=function(e){this.ondataavailable(e)},i.prototype.finish=function(){if(!this.config.streamPages){var e=new Uint8Array(this.totalLength);this.recordedPages.reduce((function(t,o){return e.set(o,t),t+o.length}),0),this.ondataavailable(e)}this.onstop(),this.config.reuseWorker||delete this.encoder},i.prototype.ondataavailable=function(){},i.prototype.onpause=function(){},i.prototype.onresume=function(){},i.prototype.onstart=function(){},i.prototype.onstop=function(){},e.exports=i}).call(this,o(1))},function(e,t){var o;o=function(){return this}();try{o=o||new Function("return this")()}catch(e){"object"==typeof window&&(o=window)}e.exports=o}])}));