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• 句法
• 范例
• 另请参阅
• 相关话题

过时
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

AudioContext.createJavaScriptNode() method creates a JavaScriptNode which is used for directly manipulating audio data with JavaScript.

重要 : This method is obsolete, and has been renamed to AudioContext.createScriptProcessor() 。另请参阅 ScriptProcessorNode .

句法

var jsNode = audioCtx.createJavaScriptNode(bufferSize, numInputChannels, numOutputChannels);
					

参数

bufferSize

The buffer size must be in units of sample frames, i.e., one of: 256, 512, 1024, 2048, 4096, 8192, or 16384. It controls the frequency of callbacks asking for a buffer refill. Smaller sizes allow for lower latency and higher for better overall quality.

numInputChannels

The number of input channels in the audio stream.

numOutputChannels

The number of output channels in the audio stream.

范例

The following script illustrates the use of createJavaScriptNode() :

var SineWave = function(context) {
  var that = this;
  this.x = 0; // Initial sample number
  this.context = context;
  this.node = context.createJavaScriptNode(1024, 1, 1);
  this.node.onaudioprocess = function(e) { that.process(e) };
}
SineWave.prototype.process = function(e) {
  var data = e.outputBuffer.getChannelData(0);
  for (var i = 0; i < data.length; ++i) {
    data[i] = Math.sin(this.x++);
  }
}
SineWave.prototype.play = function() {
  this.node.connect(this.context.destination);
}
SineWave.prototype.pause = function() {
  this.node.disconnect();
}
					

另请参阅

• Generating Tones with the Web Audio API
• Exploring the HTML5 Web Audio: visualizing sound

元数据

• 最后修改： 2019 年 3 月 23 日

相关话题

1. Web 音频 API
2. AudioContext
3. 构造函数

   1. AudioContext()
4. 特性

   1. baseLatency
   2. outputLatency
5. 方法

   1. close()
   2. createJavaScriptNode()
   3. createMediaElementSource()
   4. createMediaStreamDestination()
   5. createMediaStreamSource()
   6. createMediaStreamTrackSource()
   7. createWaveTable()
   8. getOutputTimestamp()
   9. suspend()
6. 继承：

   1. EventTarget
7. 事件

   1. statechange
   2. complete
   3. ended
   4. message
   5. loaded
   6. audioprocess
   7. nodecreate
8. Related pages for Web Audio API

   1. AnalyserNode
   2. AudioBuffer
   3. AudioBufferSourceNode
   4. AudioContextOptions
   5. AudioDestinationNode
   6. AudioListener
   7. AudioNode
   8. AudioNodeOptions
   9. AudioParam
   10. AudioProcessingEvent
   11. AudioScheduledSourceNode
   12. BaseAudioContext
   13. BiquadFilterNode
   14. ChannelMergerNode
   15. ChannelSplitterNode
   16. ConstantSourceNode
   17. ConvolverNode
   18. DelayNode
   19. DynamicsCompressorNode
   20. GainNode
   21. IIRFilterNode
   22. MediaElementAudioSourceNode
   23. MediaStreamAudioDestinationNode
   24. MediaStreamAudioSourceNode
   25. OfflineAudioCompletionEvent
   26. OfflineAudioContext
   27. OscillatorNode
   28. PannerNode
   29. PeriodicWave
   30. StereoPannerNode
   31. WaveShaperNode