//獲取音頻上下文,獲取麥克風(fēng)輸入
window.AudioContext = window.AudioContext || window.webkitAudioContext;
var context = new window.AudioContext();
var buffSize = 4096;
var input = context.createMediaStreamSource(stream);
//創(chuàng)建處理節(jié)點
var processor = context.createScriptProcessor(buffSize,input.channelCount,input.channelCount);
input.connect(processor);
processor.connect(context.destination);
//錄音處理函數(shù)
processor.onaudioprocess = function(event) {
var audioData = event.inputBuffer.getChannelData(0);
//發(fā)送音頻數(shù)據(jù)給服務(wù)器，即實現(xiàn)錄音過程
socket.emit('audio', audioData);
};