43 lines
705 B
JavaScript
43 lines
705 B
JavaScript
/**
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* @author mrdoob / http://mrdoob.com/
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*/
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function AudioAnalyser( audio, fftSize ) {
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this.analyser = audio.context.createAnalyser();
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this.analyser.fftSize = fftSize !== undefined ? fftSize : 2048;
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this.data = new Uint8Array( this.analyser.frequencyBinCount );
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audio.getOutput().connect( this.analyser );
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}
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Object.assign( AudioAnalyser.prototype, {
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getFrequencyData: function () {
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this.analyser.getByteFrequencyData( this.data );
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return this.data;
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},
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getAverageFrequency: function () {
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var value = 0, data = this.getFrequencyData();
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for ( var i = 0; i < data.length; i ++ ) {
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value += data[ i ];
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}
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return value / data.length;
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}
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} );
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export { AudioAnalyser };
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