123 lines
3.7 KiB
Java
123 lines
3.7 KiB
Java
/*
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Reversound is used to get the music sheet of a piece from a music file.
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Copyright (C) 2014 Gabriel AUGENDRE
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Copyright (C) 2014 Gabriel DIENY
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Copyright (C) 2014 Arthur GAUCHER
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Copyright (C) 2014 Gabriel LEPETIT-AIMON
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package processing;
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import conteneurs.Gamme;
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import conteneurs.Spectre;
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/**
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* Created by gaby on 27/04/14.
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*/
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public abstract class SpectreFilter {
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protected SpectreFilter previousFilter = null;
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protected float filterIntensity = 1;
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protected boolean autoIntensity = true;
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public SpectreFilter(){
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init();
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}
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protected void init(){}
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/**
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* Renvoie l'amplitude filtré en fonction de l'indice de la fréquence dans le spectre et du spectre
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* Cette méthode peut être hérité pour définir un filtre propre à chaque fréquence
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* @param idFreq l'index associé à la fréquence que l'on veut filtrer
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* @param spectre spectre d'entrée
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* @return amplitude filtrée
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*/
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protected abstract float filter(int idFreq, Spectre spectre);
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/**
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* Renvoie l'amplitude filtré en fonction de l'indice de la fréquence dans le spectre et du spectre
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* @param idFreq l'index associé à la fréquence que l'on veut filtrer
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* @param spectre spectre du signal
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* @return l'amplitude de la fréquence filtré à travers la chaine de filtre
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*/
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public float filterAmpli(int idFreq, Spectre spectre){
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if(previousFilter==null)
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return autoIntensity?filterIntensity*filter(idFreq,spectre)+(1-filterIntensity)*spectre.getAmplitude(idFreq)/2:filter(idFreq,spectre);
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return filter(idFreq, previousFilter.filterSpectre(spectre));
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}
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/**
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* Renvoie le spectre filtré à travers la chaine de filtre du premier maillon jusqu'à celui-ci
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* @param spectre spectre d'entrée
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* @return spectre filtré à travers la chaine
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*/
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public Spectre filterSpectre(Spectre spectre){
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Spectre r = new Spectre(spectre.getGamme());
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Gamme gamme = spectre.getGamme();
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if(previousFilter!=null)
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spectre = previousFilter.filterSpectre(spectre);
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for (int i = 0; i < gamme.gammeSize(); i++)
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r.setAmplitudeAt(i, autoIntensity?filterIntensity*filter(i,spectre)+(1-filterIntensity)*spectre.getAmplitude(i)/2:filter(i,spectre));
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return r;
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}
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/**
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* Chaine un filtre à celui-ci, le filtre chainer sera executé après ce filtre
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* @param filter le filtre à ajouter à la chaine de traitement
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* @return la chaine de filtre
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*/
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public SpectreFilter chainFilter(SpectreFilter filter){
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filter.previousFilter = this;
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return filter;
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}
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/**
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* Coupe la chaine à ce filtre il est maintenant le premier filtre à être executé lors du calcul de la chaine
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* @return Vrai si il n'était pas déjà le premier maillon
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*/
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public boolean unchainFilter(){
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if(previousFilter==null)
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return false;
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previousFilter = null;
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return true;
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}
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/**
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* Renvoie le maillon précédant dans la chaine
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* @return
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*/
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public SpectreFilter getPreviousFilter(){
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return previousFilter;
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}
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public float getFilterIntensity() {
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return filterIntensity;
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}
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public SpectreFilter setIntensity(float filterIntensity) {
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this.filterIntensity = filterIntensity;
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return this;
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}
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}
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