three
Version:
JavaScript 3D library
41 lines (22 loc) • 734 B
JavaScript
/**
* @author mrdoob / http://mrdoob.com/
*/
THREE.AudioAnalyser = function ( audio, fftSize ) {
this.analyser = audio.context.createAnalyser();
this.analyser.fftSize = fftSize !== undefined ? fftSize : 2048;
this.data = new Uint8Array( this.analyser.frequencyBinCount );
audio.getOutput().connect( this.analyser );
};
Object.assign( THREE.AudioAnalyser.prototype, {
getFrequencyData: function () {
this.analyser.getByteFrequencyData( this.data );
return this.data;
},
getAverageFrequency: function () {
var value = 0, data = this.getFrequencyData();
for ( var i = 0; i < data.length; i ++ ) {
value += data[ i ];
}
return value / data.length;
}
} );