@bddh/starling-realtime-client/es/RecordController.js

import{createClass as t,asyncToGenerator as e,regeneratorRuntime as r,objectSpread2 as o,classCallCheck as a,defineProperty as i}from"./_virtual/_rollupPluginBabelHelpers.js";function n(t,e,r,o){try{for(var a=(o=o||{})&&"number"==typeof o.index?o.index:0,i=o&&"number"==typeof o.offset?o.offset:0,n=0,s=a;s<t.length;s++)n+=t[s].length;n=Math.max(0,n-Math.floor(i));var c=e/r;c>1?n=Math.floor(n/c):(c=1,r=e);for(var u=new Int16Array(n),h=0,d=t.length;a<d;a++){for(var p=t[a],l=i,f=p.length;l<f;){var m=Math.floor(l),v=Math.ceil(l),x=l-m;u[h]=p[m]+(p[v]-p[m])*x,h++,l+=c}i=l-f}return{index:a,offset:i,sampleRate:r,data:u}}catch(t){console.log("转音错误了",t)}}function s(t){for(var e=t,r=new Int16Array(t.length),o=0;o<e.length;o++){var a=Math.max(-1,Math.min(1,e[o]));r[o]=a<0?32768*a:32767*a}return r}var c=function(c,u){function h(t){a(this,h),i(this,"onAudioData",void 0),i(this,"onError",void 0),i(this,"audioContext",null),i(this,"processor",null),i(this,"mediaStream",null),i(this,"recording",!1),i(this,"audio3AConstraints",void 0),i(this,"asrSample",void 0),this.onAudioData=t.onAudioData,this.onError=t.onError,this.audio3AConstraints=t.audio3AConstraints,this.asrSample=t.asrSample,this.preWarmStream()}return t(h,[{key:"preWarmStream",value:function(){return(c=c||e(r().mark((function t(){var e,a,i;return r().wrap((function(t){for(;;)switch(t.prev=t.next){case 0:if(t.prev=0,a=window.AudioContext||window.webkitAudioContext){t.next=4;break}throw new Error("当前环境不支持web api: AudioContext");case 4:if(null!==(e=navigator.mediaDevices)&&void 0!==e&&e.getUserMedia){t.next=6;break}throw new Error("当前环境不支持web api: getUserMedia");case 6:return this.audioContext=new a({sampleRate:this.asrSample||16e3}),t.next=9,navigator.mediaDevices.getUserMedia({audio:o({echoCancellation:!0,noiseSuppression:!0,autoGainControl:!0},this.audio3AConstraints),video:!1});case 9:this.mediaStream=t.sent,i=this.audioContext.createMediaStreamSource(this.mediaStream),this.processor=this.audioContext.createScriptProcessor(1024,1,1),i.connect(this.processor),this.processor.connect(this.audioContext.destination),this.processor.onaudioprocess=function(){},t.next=20;break;case 17:t.prev=17,t.t0=t.catch(0),console.error("preWarmStream error",t.t0);case 20:case"end":return t.stop()}}),t,this,[[0,17]])})))).apply(this,arguments)}},{key:"start",value:function(){return(u=u||e(r().mark((function t(){var e=this;return r().wrap((function(t){for(;;)switch(t.prev=t.next){case 0:if(!this.recording){t.next=2;break}return t.abrupt("return");case 2:if(this.audioContext&&this.processor){t.next=4;break}return t.abrupt("return");case 4:try{this.processor.onaudioprocess=function(t){if(e.recording){var r=n([s(t.inputBuffer.getChannelData(0))],e.audioContext.sampleRate,e.asrSample||16e3,null);r&&r.data&&e.onAudioData(r.data.buffer)}},this.recording=!0}catch(t){this.onError&&this.onError(t)}case 5:case"end":return t.stop()}}),t,this)})))).apply(this,arguments)}},{key:"stop",value:function(){this.recording=!1,this.processor.onaudioprocess=function(){}}},{key:"destroy",value:function(){this.recording=!1,this.processor&&(this.processor.disconnect(),this.processor.onaudioprocess=null),this.audioContext&&this.audioContext.close(),this.mediaStream&&this.mediaStream.getTracks().forEach((function(t){t.stop()}))}}]),h}();export{c as default};