com.musicg.fingerprint.FingerprintSimilarity Maven / Gradle / Ivy

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Musicg is a lightweight audio analysis library, written in Java, with the purpose of extracting both high level and low level audio features.

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/*
 * Copyright (C) 2012 Jacquet Wong
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.musicg.fingerprint;

import com.musicg.properties.FingerprintProperties;

/**
 * A class for fingerprint's similarity
 * 
 * @author jacquet
 *
 */
public class FingerprintSimilarity {
	
	private FingerprintProperties fingerprintProperties=FingerprintProperties.getInstance();
	private int mostSimilarFramePosition;
	private float score;
	private float similarity;

	/**
	 * Constructor
	 */
	public FingerprintSimilarity() {
		mostSimilarFramePosition = Integer.MIN_VALUE;
		score=-1;
		similarity = -1;
	}

	/**
	 * Get the most similar position in terms of frame number
	 * 
	 * @return most similar frame position
	 */
	public int getMostSimilarFramePosition() {
		return mostSimilarFramePosition;
	}

	/**
	 * Set the most similar position in terms of frame number
	 * 
	 * @param mostSimilarFramePosition
	 */
	public void setMostSimilarFramePosition(int mostSimilarFramePosition) {
		this.mostSimilarFramePosition = mostSimilarFramePosition;
	}

	/**
	 * Get the similarity of the fingerprints
	 * similarity from 0~1, which 0 means no similar feature is found and 1 means in average there is at least one match in every frame
	 * 
	 * @return fingerprints similarity
	 */
	public float getSimilarity() {
		return similarity;
	}

	/**
	 * Set the similarity of the fingerprints
	 * 
	 * @param fingerprints similarity
	 */
	public void setSimilarity(float similarity) {
		this.similarity = similarity;
	}
	
	/**
	 * Get the similarity score of the fingerprints
	 * Number of features found in the fingerprints per frame 
	 * 
	 * @return fingerprints similarity score
	 */
	public float getScore() {
		return score;
	}
	
	/**
	 * Set the similarity score of the fingerprints
	 * 
	 * @param score
	 */
	public void setScore(float score) {
		this.score = score;
	}

	/**
	 * Get the most similar position in terms of time in second
	 * 
	 * @return most similar starting time
	 */
	public float getsetMostSimilarTimePosition(){
		return (float)mostSimilarFramePosition/fingerprintProperties.getNumRobustPointsPerFrame()/fingerprintProperties.getFps();
	}
}