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 |
Recommendation |
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.
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| 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 |