recorder.wav.min.js

/*
录音
https://github.com/xiangyuecn/Recorder
src: recorder-core.js,engine/wav.js
*/
!function(v){"use strict";var p=function(){},R=function(e){return new t(e)};R.IsOpen=function(){var e=R.Stream;if(e){var t=(e.getTracks&&e.getTracks()||e.audioTracks||[])[0];if(t){var a=t.readyState;return"live"==a||a==t.LIVE}}return!1},R.BufferSize=4096,R.Destroy=function(){for(var e in console.log("Recorder Destroy"),a)a[e]()};var a={};R.BindDestroy=function(e,t){a[e]=t},R.Support=function(){var e=v.AudioContext;if(e||(e=v.webkitAudioContext),!e)return!1;var t=navigator.mediaDevices||{};return t.getUserMedia||(t=navigator).getUserMedia||(t.getUserMedia=t.webkitGetUserMedia||t.mozGetUserMedia||t.msGetUserMedia),!!t.getUserMedia&&(R.Scope=t,R.Ctx&&"closed"!=R.Ctx.state||(R.Ctx=new e,R.BindDestroy("Ctx",function(){var e=R.Ctx;e&&e.close&&e.close()})),!0)};R.SampleData=function(e,t,a,n,r){n||(n={});var o=n.index||0,s=n.offset||0,i=n.frameNext||[];r||(r={});var c=r.frameSize||1;r.frameType&&(c="mp3"==r.frameType?1152:1);for(var f=0,l=o;l<e.length;l++)f+=e[l].length;f=Math.max(0,f-Math.floor(s));var u=t/a;1<u?f=Math.floor(f/u):(u=1,a=t),f+=i.length;var v=new Int16Array(f),p=0;for(l=0;l<i.length;l++)v[p]=i[l],p++;for(var m=e.length;o<m;o++){for(var h=e[o],d=(l=s,h.length);l<d;){var g=Math.floor(l),S=Math.ceil(l),_=l-g;v[p]=h[g]+(h[S]-h[g])*_,p++,l+=u}s=l-d}i=null;var I=v.length%c;if(0<I){var y=2*(v.length-I);i=new Int16Array(v.buffer.slice(y)),v=new Int16Array(v.buffer.slice(0,y))}return{index:o,offset:s,frameNext:i,sampleRate:a,data:v}};var n=0;function t(e){this.id=++n,R.Traffic&&R.Traffic();var t={type:"mp3",bitRate:16,sampleRate:16e3,onProcess:p};for(var a in e)t[a]=e[a];this.set=t,this._S=9}R.Sync={O:9,C:9},R.prototype=t.prototype={open:function(e,a){var t=this;e=e||p,a=a||p;var n=function(){e(),t._SO=0},r=function(e,t){/Permission|Allow/i.test(e)?a("用户拒绝了录音权限",!0):!1===v.isSecureContext?a("无权录音(需https)"):/Found/i.test(e)?a(t+"，无可用麦克风"):a(t)},o=R.Sync,s=++o.O,i=o.C;t._O=t._O_=s,t._SO=t._S;var c=function(){if(i!=o.C||!t._O){var e="open被取消";return s==o.O?t.close():e="open被中断",a(e),!0}};if(R.IsOpen())n();else if(R.Support()){var f=function(e){R.Stream=e,c()||setTimeout(function(){c()||(R.IsOpen()?(!function(){var e=R.Ctx,t=R.Stream,a=t._m=e.createMediaStreamSource(t),n=t._p=(e.createScriptProcessor||e.createJavaScriptNode).call(e,R.BufferSize,1,1);a.connect(n),n.connect(e.destination);var f=t._call={};n.onaudioprocess=function(e){for(var t in f){for(var a=e.inputBuffer.getChannelData(0),n=a.length,r=new Int16Array(n),o=0,s=0;s<n;s++){var i=Math.max(-1,Math.min(1,a[s]));i=i<0?32768*i:32767*i,r[s]=i,o+=Math.abs(i)}for(var c in f)f[c](r,o);return}}}(),n()):a("录音功能无效：无音频流"))},100)},l=function(e){var t=e.name||e.message||e.code+":"+e;console.error(e),r(t,"无法录音："+t)},u=R.Scope.getUserMedia({audio:!0},f,l);u&&u.then&&u.then(f)[e&&"catch"](l)}else r("","此浏览器不支持录音")},close:function(e){e=e||p;this._stop();var t=R.Sync;if(this._O=0,this._O_!=t.O)return console.warn("close被忽略"),void e();t.C++;var a,n=R.Stream;if(n){(a=R.Stream)._m&&(a._m.disconnect(),a._p.disconnect(),a._p.onaudioprocess=a._p=a._m=null);for(var r=n.getTracks&&n.getTracks()||n.audioTracks||[],o=0;o<r.length;o++){var s=r[o];s.stop&&s.stop()}n.stop&&n.stop()}R.Stream=0,e()},mock:function(e,t){var a=this;return a._stop(),a.isMock=1,a.buffers=[e],a.recSize=e.length,a.srcSampleRate=t,a},envStart:function(e,t){var a=this,n=a.set;if(a.isMock=e?1:0,a.buffers=[],a.recSize=0,a.envInLast=0,a.envInFirst=0,a.envInFix=0,a.envInFixTs=[],n.sampleRate=Math.min(t,n.sampleRate),a.srcSampleRate=t,a.engineCtx=0,a[n.type+"_start"]){var r=a.engineCtx=a[n.type+"_start"](n);r&&(r.pcmDatas=[],r.pcmSize=0)}},envResume:function(){this.envInFixTs=[]},envIn:function(e,t){var a=this,n=a.set,r=a.engineCtx,o=e.length;a.recSize+=o;var s=a.buffers;s.push(e);var i,c=t/o;i=c<1251?Math.round(c/1250*10):Math.round(Math.min(100,Math.max(0,100*(1+Math.log(c/1e4)/Math.log(10)))));var f=a.srcSampleRate,l=a.recSize,u=Date.now(),v=Math.round(o/f*1e3);a.envInLast=u,1==a.buffers.length&&(a.envInFirst=u-v);var p=a.envInFixTs;p.splice(0,0,{t:u,d:v});for(var m=u,h=0,d=0;d<p.length;d++){var g=p[d];if(3e3<u-g.t){p.length=d;break}m=g.t,h+=g.d}var S=p[1],_=u-m;if(_/3<_-h&&(S&&1e3<_||6<=p.length)){var I=u-S.t-v;if(v/5<I){var y=!n.disableEnvInFix;if(console.warn("["+u+"]"+(y?"":"未")+"补偿"+I+"ms"),a.envInFix+=I,y){var M=new Int16Array(I*f/1e3);a.recSize+=M.length,s.push(M)}}}if(r){var w=R.SampleData(s,f,n.sampleRate,r.chunkInfo);r.chunkInfo=w,r.pcmSize+=w.data.length,l=r.pcmSize,(s=r.pcmDatas).push(w.data),f=w.sampleRate,a[n.type+"_encode"](r,w.data)}var x=Math.round(l/f*1e3);n.onProcess(s,i,x,f)},start:function(){if(R.IsOpen()){console.log("["+Date.now()+"]Start");var e=this,t=(e.set,R.Ctx);if(e._stop(),e.state=0,e.envStart(0,t.sampleRate),e._SO&&e._SO+1!=e._S)console.warn("start被中断");else{e._SO=0;var a=function(){e.state=1,e.resume()};"suspended"==t.state?t.resume().then(function(){console.log("ctx resume"),a()}):a()}}else console.error("未open")},pause:function(){this.state&&(this.state=2,delete R.Stream._call[this.id])},resume:function(){var a=this;a.state&&(a.state=1,a.envResume(),R.Stream._call[a.id]=function(e,t){1==a.state&&a.envIn(e,t)})},_stop:function(e){var t=this,a=t.set;t.isMock||t._S++,t.state&&(t.pause(),t.state=0),!e&&t[a.type+"_stop"]&&(t[a.type+"_stop"](t.engineCtx),t.engineCtx=0)},stop:function(a,t,e){var n,r=this,o=r.set;console.log("["+Date.now()+"]Stop "+(r.envInLast?r.envInLast-r.envInFirst+"ms 补"+r.envInFix+"ms":"-"));var s=function(){r._stop(),e&&r.close()},i=function(e){t&&t(e),s()},c=function(e,t){console.log("["+Date.now()+"]结束 编码"+(Date.now()-n)+"ms 音频"+t+"ms/"+e.size+"b"),e.size<Math.max(100,t/2)?i("生成的"+o.type+"无效"):(a&&a(e,t),s())};if(!r.isMock){if(!r.state)return void i("未开始录音");r._stop(!0)}var f=r.recSize;if(f)if(r.buffers[0])if(r[o.type]){var l=r.engineCtx;if(r[o.type+"_complete"]&&l){l.pcmDatas;var u=Math.round(l.pcmSize/o.sampleRate*1e3);return n=Date.now(),void r[o.type+"_complete"](l,function(e){c(e,u)},i)}n=Date.now();var v=R.SampleData(r.buffers,r.srcSampleRate,o.sampleRate);o.sampleRate=v.sampleRate;var p=v.data;u=Math.round(p.length/o.sampleRate*1e3);console.log("采样"+f+"->"+p.length+" 花:"+(Date.now()-n)+"ms"),setTimeout(function(){n=Date.now(),r[o.type](p,function(e){c(e,u)},function(e){i(e)})})}else i("未加载"+o.type+"编码器");else i("音频被释放");else i("未采集到录音")}},v.Recorder&&v.Recorder.Destroy(),(v.Recorder=R).LM="2019-11-7 21:47:48",R.TrafficImgUrl="//ia.51.la/go1?id=20469973&pvFlag=1",R.Traffic=function(){var e=R.TrafficImgUrl;if(e){var t=R.Traffic,a=location.href.replace(/#.*/,"");if(!t[a])t[a]=1,(new Image).src=e,console.log("Traffic Analysis Image: Recorder.TrafficImgUrl="+e)}}}(window),function(){"use strict";Recorder.prototype.enc_wav={stable:!0,testmsg:"比特率取值范围8位、16位"},Recorder.prototype.wav=function(e,t,a){var n=this.set,r=e.length,o=n.sampleRate,s=8==n.bitRate?8:16,i=r*(s/8),c=new ArrayBuffer(44+i),f=new DataView(c),l=0,u=function(e){for(var t=0;t<e.length;t++,l++)f.setUint8(l,e.charCodeAt(t))},v=function(e){f.setUint16(l,e,!0),l+=2},p=function(e){f.setUint32(l,e,!0),l+=4};if(u("RIFF"),p(36+i),u("WAVE"),u("fmt "),p(16),v(1),v(1),p(o),p(o*(s/8)),v(s/8),v(s),u("data"),p(i),8==s)for(var m=0;m<r;m++,l++){var h=128+(e[m]>>8);f.setInt8(l,h,!0)}else for(m=0;m<r;m++,l+=2)f.setInt16(l,e[m],!0);t(new Blob([f.buffer],{type:"audio/wav"}))}}();