AudioBuffer.copyFromChannel()

AudioBuffer接口的copyFromChannel方法将样本从AudioBuffer的指定通道复制到目标数组中

语法

myArrayBuffer.copyFromChannel(destination,channelNumber,startInChannel);

参数

destination
将通道数据复制到的Float32Array (en-US)
channelNumber
当前AudioBuffer的通道号，用于复制通道数据。键入channelNumber大于或等于AudioBuffer.numberOfChannels，将会抛出INDEX_SIZE_ERR 的错误
startInChannel 可选
用于复制数据的可选偏移量。假如startInChannel比AudioBuffer.length大，将会抛出INDEX_SIZE_ERR 的错误

例子

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

规范

Specification Status Comment
Web Audio API
copyFromChannel		 Working Draft  

浏览器兼容性

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help! (en-US)
Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 14.0 webkit (en-US) (Yes) 27 (27) 未实现 15 webkit (en-US)
22 (unprefixed)		 未实现
Unprefixed 43.0 (Yes) ? ? ? 未实现
Feature Android Android Webview Edge Firefox Mobile (Gecko) Firefox OS IE Phone Opera Mobile Safari Mobile Chrome for Android
Basic support 未实现 ? (Yes) 27.0 (27) 1.2 未实现 未实现 未实现 28.0 webkit (en-US)
Unprefixed 未实现 未实现 (Yes) ? ? ? ? 未实现 43.0

See also