我正在尝试将<audio>
实现到THREE.js场景中,并且在音频播放时遇到了一些问题。在我注销到console
的数组中,所有输出都是"0"。我已经通过放置以下内容来解释 CORS 问题:audio.crossOrigin = "anonymous"
audio.play();
初始化之后,但这无济于事。任何想法将不胜感激。
哦,我也用服务器测试过这个,所以这不是问题。
这是存储库的链接。
这是 jsbin。
下面是代码。
.HTML
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>Threejs Experiment</title>
<link rel="stylesheet" href="style.css" media="screen" title="no title" charset="utf-8">
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r73/three.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
<script src="https://dl.dropboxusercontent.com/u/3587259/Code/Threejs/OrbitControls.js"></script>
</head>
<body>
<audio id="song" src="https://soundcloud.com/madeon/madeon-cut-the-kid"></audio>
<script type="text/javascript" src="main.js"></script>
<script type="text/javascript" src="https://cdn.rawgit.com/mrdoob/three.js/master/examples/js/controls/OrbitControls.js"></script>
</body>
</html>
JavaScript
$(function(){
// Add Audio context and Audio
var ctx = new AudioContext();
var audio = document.getElementById('song');
var audioSrc = ctx.createMediaElementSource(audio);
var analyser = ctx.createAnalyser();
audioSrc.connect(analyser);
audioSrc.connect(ctx.destination);
var frequencyData = new Uint8Array(analyser.frequencyBinCount);
// Set scene and camera
var scene = new THREE.Scene();
var aspectRatio = window.innerWidth / window.innerHeight;
var camera = new THREE.PerspectiveCamera(75, aspectRatio, 0.1, 100);
camera.target = new THREE.Vector3( 10, 10, 10 );
// Set the DOM
var renderer = new THREE.WebGLRenderer({ antialias:true });
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setClearColor("#000000");
document.body.appendChild(renderer.domElement);
// Add controls
// controls = new THREE.OrbitControls(camera, renderer );
// controls.addEventListener( 'change', render );
// Move the camera
camera.position.z = 10;
camera.position.y = 0;
// Point Lights
var pointLightBlue = new THREE.PointLight( "#00ccff", 5, 100, 2 );
pointLightBlue.position.set( -10, -40, -10 );
scene.add(pointLightBlue);
// var pointLightBlue = new THREE.PointLight( "#ffffff", 1, 0, 1 );
// pointLightBlue.position.set( -10, 20, -10 );
// scene.add(pointLightBlue);
// var pointLightPink = new THREE.PointLight( "#EE567C", 5, 100, 10 );
// pointLightPink.position.set( 1, 0, -5 );
// scene.add(pointLightPink);
var pointLight = new THREE.PointLight( "#A805FA", 100, 1000, 40 );
pointLight.position.set( 40, 0, 40 );
scene.add(pointLight);
var sphereSize = 5;
var pointLightHelper = new THREE.PointLightHelper( pointLight, sphereSize );
scene.add( pointLightHelper );
var pointLight2 = new THREE.PointLight( "#07FAA0", 100, 1000, 30 );
pointLight2.position.set( -40, 0, -40 );
scene.add(pointLight2);
var sphereSize = 5;
var pointLightHelper = new THREE.PointLightHelper( pointLight2, sphereSize );
scene.add( pointLightHelper );
var quantity = 50;
var shapes = [];
for (var i = 0; i < quantity; i++) {
if(Math.random() < 0.5){
var geometry = new THREE.RingGeometry( 50, 50, 18);
// var geometries = [
// new THREE.IcosahedronGeometry( 20, 0 ),
// new THREE.OctahedronGeometry( 20, 0 ),
// new THREE.TetrahedronGeometry( 20, 0 ),
// ];
//
// var geometry = geometries[ Math.floor( Math.random() * geometries.length ) ];
// var material = new THREE.MeshLambertMaterial( {
// color: new THREE.Color( Math.random(), Math.random() * 0.5, Math.random() ),
// blending: THREE.AdditiveBlending,
// depthTest: false,
// shading: THREE.FlatShading,
// transparent: true
// } );
// var mesh = new THREE.Mesh( geometry, material );
// var wireframe = mesh.clone();
// wireframe.material = wireframe.material.clone();
// wireframe.material.wireframe = true;
// mesh.add( wireframe );
// scene.add(mesh);
// var geometry = new THREE.RingGeometry( 20, 150, 18);
//var geometry = new THREE.TorusKnotGeometry( 10, 3, 100, 16 );
}
else {
// var geometry = new THREE.RingGeometry( 4, 40, 3);
// var geometry = new THREE.RingGeometry( 1, 5, 6 );
// var material = new THREE.MeshBasicMaterial( { color: 0xffff00,
// side: THREE.DoubleSide } );
// var mesh = new THREE.Mesh( geometry, material );
// scene.add( mesh );
// var points = [];
// for ( var j = 0; j < 10; j++ ) {
// points.push( new THREE.Vector3( Math.sin( j * 0.2 ) * 15 + 50, 0, ( j - 5 ) * 2 ) );
//
// }
// var geometry = new THREE.LatheGeometry( points );
// var material = new THREE.MeshBasicMaterial( { color: 0xffff00 } );
// var lathe = new THREE.Mesh( geometry, material );
// scene.add( lathe );
}
if(i % 7 === 0) {
var material = new THREE.MeshPhongMaterial( { color: "#ffffff"} );
}
else if(i % 2 === 0){
var material = new THREE.MeshPhongMaterial( { color: "#666666"} );
}
else {
var material = new THREE.MeshPhongMaterial( { color: "#333333"} );
}
var mesh = new THREE.Mesh(geometry, material);
mesh.position.z = -i * 2;
mesh.rotation.z = i;
shapes.push(mesh);
scene.add(mesh);
}
// Variables
var u_time = 0;
// Render function
var render = function() {
requestAnimationFrame(render);
u_time++;
for (var i = 0; i < quantity; i++) {
// Set rotation change of shapes
shapes[i].position.z += 0.2;
shapes[i].rotation.z += 0;
shapes[i].scale.x = 1 + Math.sin(i + u_time * 0.1) * 0.05;
shapes[i].scale.y = 1 + Math.sin(i + u_time * 0.1) * 0.05;
var change = 1.5 + Math.sin(u_time * 0.5) * 0.5;
// Set wireframe & width
if(Math.random() < change){
shapes[i].material.wireframe = true;
shapes[i].material.wireframeLinewidth = Math.random() * 2;
}
else {
shapes[i].material.wireframe = false;
}
if(shapes[i].position.z > 10){
shapes[i].position.z = -70;
shapes[i].rotation.z = i;
}
}
// Set Point light Intensity & Position
pointLight.intensity = Math.abs(Math.sin(u_time * 0.2) * 2);
pointLight2.intensity = Math.abs(Math.cos(u_time * 0.2) * 2);
pointLight.position.z = Math.abs(Math.sin(u_time * 0.02) * 30);
pointLight2.position.z = Math.abs(Math.cos(u_time * 0.02) * 30);
// camera.rotation.y = 90 * Math.PI / 180;
// camera.rotation.z = frequencyData[20] * Math.PI / 180;
// camera.rotation.x = frequencyData[100] * Math.PI / 180;
console.log(frequencyData);
//composer.render();
renderer.render(scene, camera);
}
audio.play();
// audio.crossOrigin = "anonymous";
render();
});
"CORS 不是问题"是什么意思?
-
如果音频来自不同的来源,则需要在设置 src 属性之前设置
crossOrigin
属性someAudioElement.crossOrigin = "anonymous";
换句话说,要么将 crossOrigin 属性放在标记本身中
<audio crossOrigin="anonymous" src="http://somedomain/someaudio">...
或者在 JavaScript 中
someAudioElement.crossOrigin = "anonymous"; someAudioElement.src = "http://somedomain/someaudio";
您之前必须执行此操作的原因是,当您设置
src
属性时,浏览器将尝试获取音频。如果尚未设置crossOrigin
属性,则浏览器将不知道请求使用音频的权限。请注意,所做的只是请求服务器的权限。服务器本身仍然必须授予浏览器使用音频的权限。大多数服务器不授予此权限。Soundcloud可以,但不是所有歌曲。
-
iOS 上的 Safari 和 Android 上的 Chrome 不支持分析流音频数据。
您可以在此处跟踪 Chrome 问题以解决此问题。如果要跟踪进度,请为其加星标。我不知道是否有webkit错误来跟踪iOS上的问题
-
AFAIK 你不能直接播放声音云网址
你有这样的代码
<audio id="song" src="https://soundcloud.com/madeon/madeon-cut-the-kid"></audio>
这不是声音云音频的有效 URL。您必须将该URL与API密钥一起传递给soundcloud API,它会为您提供正确的URL。
这是一个关于它的问题
其他需要注意的事项:
soundcloud SDK 3.0 SDK 无法在 Safari 上分析音频。使用 soundcloud SDK 2.0 或更高版本,请使用直接 XMLHttpRequest,因为即使您不使用 Soundcloud SDK 2.0 也会初始化 Flash。
使用声音云 sdk 2.0 的示例
在 HTML 中
<script src="https://connect.soundcloud.com/sdk-2.0.0.js"></script>
在 Javascript 中
// see https://auth0.com/docs/connections/social/soundcloud var yourSoundCloudClientId = "???????"; SC.initialize({ client_id: yoursCoundCloudClientId, }); var soundCloudURL = "https://soundcloud.com/madeon/madeon-cut-the-kid"; SC.get("/resolve", { url: soundCloudUrl }, function(result, err) { if (err) { console.error("bad url:", url, err); return; } if (result.streamable && result.stream_url) { var src = result.stream_url + '?client_id=' + yourSoundCloudClientId; someAudioElement.crossOrigin = "anonymous"; someAudioElement.src = src; // other things you might be interested in because // if you use soundcloud music you're required to give // and display attribution and links console.log("link to music:", result.permalink_url); console.log("link to band:", result.user.permalink_url); console.log("name of song:", result.title); console.log("name to band:", result.user.username); } else { console.error("not streamable:", url); } });
此示例在没有 soundcloud SDK 的情况下完成此操作。