js 播放音频文件 兼容火狐 谷歌浏览器

var url='/js/634.ogg';
window.AudioContext = window.AudioContext || window.webkitAudioContext || window.mozAudioContext ||
window.msAudioContext;
try {
var context = new window.AudioContext();;
var source = null;
var audioBuffer = null;
function playSound() {
source = context.createBufferSource();
source.buffer = audioBuffer;
source.loop = false;
source.connect(context.destination);
source.start(0); //立即播放
}

function initSound(arrayBuffer) {
context.decodeAudioData(arrayBuffer, function (buffer) { //解码成功时的回调函数
audioBuffer = buffer;
playSound();
}, function (e) { //解码出错时的回调函数
console.log('Error decoding file', e);
});
}

function loadAudioFile(url) {
var xhr = new XMLHttpRequest(); //通过XHR下载音频文件
xhr.open('GET', url, true);
xhr.responseType = 'arraybuffer';
xhr.onload = function (e) { //下载完成
initSound(this.response);
};
xhr.send();
}
loadAudioFile(url);
} catch (e) {
console.log('!Your browser does not support AudioContext');
}