AudioBuffer.copyFromChannel() - Web API 接口参考 编辑

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

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!

• Desktop
• Mobile

Feature	Chrome	Edge	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	14.0 webkit	(Yes)	27 (27)	未实现	15 webkit 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
Unprefixed	未实现	未实现	(Yes)	?	?	?	?	未实现	43.0

See also

• Using the Web Audio API