Javascript 未捕获类型错误:无法读取属性';getByteTimeDomainData';未定义的
我正在尝试创建一个类似飞翼鸟的游戏,其中麦克风的振幅用于驾驶飞机。问题是,我在尝试使用Javascript 未捕获类型错误:无法读取属性';getByteTimeDomainData';未定义的,javascript,jquery,audio-streaming,document-ready,Javascript,Jquery,Audio Streaming,Document Ready,我正在尝试创建一个类似飞翼鸟的游戏,其中麦克风的振幅用于驾驶飞机。问题是,我在尝试使用AnalyzerNode访问音频信号数据时,不断收到“未捕获类型错误:无法读取未定义的属性'getByteTimeDomainData' 我认为问题的产生是因为AudioContext的初始化发生在调用AnalyserNode之后,因为控制台日志显示getAudioAmp()在draw()之前声明$(document).ready()使用console.log() 以下是代码的相关部分: var canvas
AnalyzerNode
访问音频信号数据时,不断收到“未捕获类型错误:无法读取未定义的属性'getByteTimeDomainData'
我认为问题的产生是因为AudioContext
的初始化发生在调用AnalyserNode之后,因为控制台日志显示getAudioAmp()
在draw()
之前声明$(document).ready()
使用console.log()
以下是代码的相关部分:
var canvas = document.getElementById("myCanvas");
var ctx = canvas.getContext("2d");
var audioContext;
var mediaStreamSource;
var analyser;
var bufferLength;
var dataArray;
var myAudio = document.querySelector('audio');
$(document).ready(function() {
navigator.getUserMedia = (navigator.webkitGetUserMedia ||navigator.mozGetUserMedia ||navigator.msGetUserMedia);
if (navigator.getUserMedia) {
navigator.getUserMedia({video: false,audio: true},
function(stream) {
if (window.AudioContext) {
audioContext = new AudioContext();
} else {
audioContext = new webkitAudioContext();
}
mediaStreamSource = audioContext.createMediaStreamSource(stream);
console.log(1)
analyser = audioContext.createAnalyser(); <----initialization of AnalyserNode------------
bufferLength = analyser.frequencyBinCount;
dataArray = new Uint8Array(bufferLength);
mediaStreamSource.connect(analyser);},
function(){alert("The following error occured: " + err.name);});
} else {
alert('OOPS No browser Support');
}
});
var getAudioAmp = function() {
console.log(2)
analyser.getByteTimeDomainData(dataArray); <---Line that causes Error----------------
var total = 0;
for (var i = 0; i < bufferLength; i++) {
total += dataArray[i];
var amp = total / dataArray.length;
}
return amp;
}
function draw() {
console.log(3)
ctx.clearRect(0, 0, canvas.width, canvas.height);
amp = getAudioAmp() <----------------where I call getAudioAmp()-------------
console.log(amp)
drawScore()
drawStat()
drawplane()
drawBricks()
collisionDetection()
score++;
requestAnimationFrame(draw);
}
draw();
var canvas=document.getElementById(“myCanvas”);
var ctx=canvas.getContext(“2d”);
听力语境;
var-mediaStreamSource;
var分析仪;
变量缓冲长度;
var数据阵列;
var myAudio=document.querySelector('audio');
$(文档).ready(函数(){
navigator.getUserMedia=(navigator.webkitGetUserMedia | | | navigator.mozGetUserMedia | | | navigator.msGetUserMedia);
if(navigator.getUserMedia){
getUserMedia({video:false,audio:true},
功能(流){
if(window.AudioContext){
audioContext=新的audioContext();
}否则{
audioContext=新的webkitAudioContext();
}
mediaStreamSource=audioContext.createMediaStreamSource(流);
控制台日志(1)
Analyzer=audioContext.CreateAnalyzer();您在哪里创建变量Analyzer
,它被省略了。draw
函数中的ctx
是什么?是否navigator.getUserMedia
需要先运行?kkawabat,您能发布html吗?太好了,这就足够了。