cordova-plugin-audioinput
Version:
This cordova plugin enables audio capture from the device microphone, by in (near) real-time forwarding raw audio data to the web layer of your application.
2 lines (1 loc) • 1.13 kB
JavaScript
(function(n){var a=Math.min,s=Math.max;var e=function(n,a,e){var s=e.length;for(var t=0;t<s;++t)n.setUint8(a+t,e.charCodeAt(t))};var t=function(t,e){this.sampleRate=t;this.numChannels=e;this.numSamples=0;this.dataViews=[]};t.prototype.encode=function(r){var t=r[0].length,u=this.numChannels,h=new DataView(new ArrayBuffer(t*u*2)),o=0;for(var e=0;e<t;++e)for(var n=0;n<u;++n){var i=r[n][e]*32767;h.setInt16(o,i<0?s(i,-32768):a(i,32767),true);o+=2}this.dataViews.push(h);this.numSamples+=t};t.prototype.finish=function(s){var n=this.numChannels*this.numSamples*2,t=new DataView(new ArrayBuffer(44));e(t,0,"RIFF");t.setUint32(4,36+n,true);e(t,8,"WAVE");e(t,12,"fmt ");t.setUint32(16,16,true);t.setUint16(20,1,true);t.setUint16(22,this.numChannels,true);t.setUint32(24,this.sampleRate,true);t.setUint32(28,this.sampleRate*4,true);t.setUint16(32,this.numChannels*2,true);t.setUint16(34,16,true);e(t,36,"data");t.setUint32(40,n,true);this.dataViews.unshift(t);var a=new Blob(this.dataViews,{type:"audio/wav"});this.cleanup();return a};t.prototype.cancel=t.prototype.cleanup=function(){delete this.dataViews};n.WavAudioEncoder=t})(self);