41 lines
591 B
JavaScript
41 lines
591 B
JavaScript
class AudioAnalyser {
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constructor( audio, fftSize = 2048 ) {
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this.analyser = audio.context.createAnalyser();
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this.analyser.fftSize = fftSize;
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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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getFrequencyData() {
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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() {
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let value = 0;
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const data = this.getFrequencyData();
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for ( let 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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