Android Open Source - Musicdroid Octave

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Musicdroid: An on-device music generator for Android
 * Copyright (C) 2010-2014 The Catrobat Team
 * (<http://developer.catrobat.org/credits>)
 */*from  w  w  w .  j a va2 s  . c  o m*/
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * An additional term exception under section 7 of the GNU Affero
 * General Public License, version 3, is available at
 * http://developer.catrobat.org/license_additional_term
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.catrobat.musicdroid.pocketmusic.note;

import java.util.Arrays;

public final class Octave {

    public static final int NUMBER_OF_HALF_TONE_STEPS_PER_OCTAVE = 12;
    public static final int NUMBER_OF_UNSIGNED_HALF_TONE_STEPS_PER_OCTAVE = 7;

    private NoteName[] noteNames;

    private Octave(NoteName[] noteNames) {
        this.noteNames = noteNames;
    }

    public static Octave createSubContraOctave() {
        return new Octave(new NoteName[] { NoteName.A0, NoteName.A0S, NoteName.B0 });
    }

    public static Octave createContraOctave() {
        return new Octave(new NoteName[] { NoteName.C1, NoteName.C1S, NoteName.D1, NoteName.D1S, NoteName.E1,
                NoteName.F1, NoteName.F1S, NoteName.G1, NoteName.G1S, NoteName.A1, NoteName.A1S, NoteName.B1 });
    }

    public static Octave createGreatOctave() {
        return new Octave(new NoteName[] { NoteName.C2, NoteName.C2S, NoteName.D2, NoteName.D2S, NoteName.E2,
                NoteName.F2, NoteName.F2S, NoteName.G2, NoteName.G2S, NoteName.A2, NoteName.A2S, NoteName.B2 });
    }

    public static Octave createSmallOctave() {
        return new Octave(new NoteName[] { NoteName.C3, NoteName.C3S, NoteName.D3, NoteName.D3S, NoteName.E3,
                NoteName.F3, NoteName.F3S, NoteName.G3, NoteName.G3S, NoteName.A3, NoteName.A3S, NoteName.B3 });
    }


    public static Octave createOneLineOctave() {
        return new Octave(new NoteName[] { NoteName.C4, NoteName.C4S, NoteName.D4, NoteName.D4S, NoteName.E4,
                NoteName.F4, NoteName.F4S, NoteName.G4, NoteName.G4S, NoteName.A4, NoteName.A4S, NoteName.B4 });
    }

    public static Octave createTwoLineOctave() {
        return new Octave(new NoteName[] { NoteName.C5, NoteName.C5S, NoteName.D5, NoteName.D5S, NoteName.E5,
                NoteName.F5, NoteName.F5S, NoteName.G5, NoteName.G5S, NoteName.A5, NoteName.A5S, NoteName.B5 });
    }

    public static Octave createThreeLineOctave() {
        return new Octave(new NoteName[] { NoteName.C6, NoteName.C6S, NoteName.D6, NoteName.D6S, NoteName.E6,
                NoteName.F6, NoteName.F6S, NoteName.G6, NoteName.G6S, NoteName.A6, NoteName.A6S, NoteName.B6 });
    }

    public static Octave createFourLineOctave() {
        return new Octave(new NoteName[] { NoteName.C7, NoteName.C7S, NoteName.D7, NoteName.D7S, NoteName.E7,
                NoteName.F7, NoteName.F7S, NoteName.G7, NoteName.G7S, NoteName.A7, NoteName.A7S, NoteName.B7 });
    }

    public static Octave createFiveLineOctave() {
        return new Octave(new NoteName[] { NoteName.C8 });
    }

    public static Octave createCustomOctave(NoteName startNoteName) {
        NoteName currentNoteName = startNoteName;
        NoteName[] noteNames = new NoteName[NUMBER_OF_HALF_TONE_STEPS_PER_OCTAVE];

        for (int i = 0; i < noteNames.length; i++) {
            noteNames[i] = currentNoteName;

            if (currentNoteName == currentNoteName.next()) {
                return new Octave(Arrays.copyOf(noteNames, i + 1));
            }

            currentNoteName = currentNoteName.next();
        }

        return new Octave(noteNames);
    }

    public NoteName[] getNoteNames() {
        return noteNames;
    }
}

Java Source Code List

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