了解AudioBuffer到ArrayBuffer的转换 [英] Understanding AudioBuffer to ArrayBuffer conversion

问题描述

我有一个AudioBuffer客户端，我想AJAX到快递服务器.

I have an AudioBuffer client-side that I'd like to AJAX to a express server.

此链接显示了XMLHttpRequest如何发送/接收二进制数据-ArrayBuffer.

This link shows how a XMLHttpRequest can send/receive binary data - ArrayBuffer.

ArrayBuffer与AudioBuffer(或者我相信)不同，因为我首先解码了ArrayBuffer来制作AudioBuffer.使用 decodeAudioData()完成此操作网络音频API.

An ArrayBuffer is different to an AudioBuffer (or so I believe) as I decoded an ArrayBuffer to make the AudioBuffer in the first place. This was done using decodeAudioData() as part of the Web Audio API.

所以我的问题是，我可以将AudioBuffer转换回ArrayBuffer吗?

So my question is, can I convert an AudioBuffer back to an ArrayBuffer?

如果可能的话，我想将ArrayBuffer发送到我的快递服务器，然后将其转发到S3存储桶，如

If this is possible, I'd like to then send the ArrayBuffer to my express server and then forward it on to a S3 bucket as shown in this example.

在该示例中，代码在通过fs.readFileSync()创建的S3存储桶中放置了一个Buffer.我认为Buffer和ArrayBuffer之间的区别不会是S3的问题:S

In that example, the code PUTs a Buffer in a S3 bucket created via a fs.readFileSync(). I assume the difference between a Buffer and ArrayBuffer wont be an issue with S3 :S

推荐答案

使用 copyFromChannel 方法，然后将 Float32Array 转换为 ArrayBuffer .

Use the copyFromChannel method, then convert the Float32Array to an ArrayBuffer.

var myArrayBuffer = audioCtx.createBuffer(2, frameCount, audioCtx.sampleRate);  
var anotherArray = new Float32Array();
myArrayBuffer.copyFromChannel(anotherArray,1,0);

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