reverb.min.js

var reverbjs={extend:function(audioContext){function decodeBase64ToArrayBuffer(input){function encodedValue(input,index){var encodedCharacter,x=input.charCodeAt(index);return index<input.length&&(x>=65&&90>=x?encodedCharacter=x-65:x>=97&&122>=x?encodedCharacter=x-71:x>=48&&57>=x?encodedCharacter=x+4:43===x?encodedCharacter=62:47===x?encodedCharacter=63:61!==x&&console.log("base64 encountered unexpected character code: "+x)),encodedCharacter}if(0===input.length||input.length%4>0)return void console.log("base64 encountered unexpected length: "+input.length);for(var i,padding=input.match(/[=]*$/)[0].length,decodedLength=3*input.length/4-padding,buffer=new ArrayBuffer(decodedLength),bufferView=new Uint8Array(buffer),encoded=[],d=0,e=0;decodedLength>d;){for(i=0;4>i;i+=1)encoded[i]=encodedValue(input,e),e+=1;bufferView[d]=4*encoded[0]+Math.floor(encoded[1]/16),d+=1,decodedLength>d&&(bufferView[d]=encoded[1]%16*16+Math.floor(encoded[2]/4),d+=1),decodedLength>d&&(bufferView[d]=encoded[2]%4*64+encoded[3],d+=1)}return buffer}function decodeAndSetupBuffer(node,arrayBuffer,callback){audioContext.decodeAudioData(arrayBuffer,function(audioBuffer){console.log("Finished decoding audio data."),node.buffer=audioBuffer,"function"==typeof callback&&null!==audioBuffer&&callback(node)},function(e){console.log("Could not decode audio data: "+e)})}audioContext.createReverbFromBase64=function(audioBase64,callback){var reverbNode=audioContext.createConvolver();return decodeAndSetupBuffer(reverbNode,decodeBase64ToArrayBuffer(audioBase64),callback),reverbNode},audioContext.createSourceFromBase64=function(audioBase64,callback){var sourceNode=audioContext.createBufferSource();return decodeAndSetupBuffer(sourceNode,decodeBase64ToArrayBuffer(audioBase64),callback),sourceNode},audioContext.createReverbFromUrl=function(audioUrl,callback){console.log("Downloading impulse response from "+audioUrl);var reverbNode=audioContext.createConvolver(),request=new XMLHttpRequest;return request.open("GET",audioUrl,!0),request.onreadystatechange=function(){4===request.readyState&&200===request.status&&(console.log("Downloaded impulse response"),decodeAndSetupBuffer(reverbNode,request.response,callback))},request.onerror=function(e){console.log("There was an error receiving the response: "+e),reverbjs.networkError=e},request.responseType="arraybuffer",request.send(),reverbNode},audioContext.createSourceFromUrl=function(audioUrl,callback){console.log("Downloading sound from "+audioUrl);var sourceNode=audioContext.createBufferSource(),request=new XMLHttpRequest;return request.open("GET",audioUrl,!0),request.onreadystatechange=function(){4===request.readyState&&200===request.status&&(console.log("Downloaded sound"),decodeAndSetupBuffer(sourceNode,request.response,callback))},request.onerror=function(e){console.log("There was an error receiving the response: "+e),reverbjs.networkError=e},request.responseType="arraybuffer",request.send(),sourceNode},audioContext.createReverbFromBase64Url=function(audioUrl,callback){console.log("Downloading base64 impulse response from "+audioUrl);var reverbNode=audioContext.createConvolver(),request=new XMLHttpRequest;return request.open("GET",audioUrl,!0),request.onreadystatechange=function(){4===request.readyState&&200===request.status&&(console.log("Downloaded impulse response"),decodeAndSetupBuffer(reverbNode,decodeBase64ToArrayBuffer(request.response),callback))},request.onerror=function(e){console.log("There was an error receiving the response: "+e),reverbjs.networkError=e},request.send(),reverbNode},audioContext.createSourceFromBase64Url=function(audioUrl,callback){console.log("Downloading base64 sound from "+audioUrl);var sourceNode=audioContext.createBufferSource(),request=new XMLHttpRequest;return request.open("GET",audioUrl,!0),request.onreadystatechange=function(){4===request.readyState&&200===request.status&&(console.log("Downloaded sound"),decodeAndSetupBuffer(sourceNode,decodeBase64ToArrayBuffer(request.response),callback))},request.onerror=function(e){console.log("There was an error receiving the response: "+e),reverbjs.networkError=e},request.send(),sourceNode}}};