de.johni0702.api.noteblock.parser.NbsParser.java Source code

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Here is the source code for de.johni0702.api.noteblock.parser.NbsParser.java

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/*
 * This file is part of NoteBlockAPI, licensed under the MIT License (MIT).
 *
 * Copyright (c) 2015 Johni0702 <https://github.com/johni0702>
 * Copyright (c) contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package de.johni0702.api.noteblock.parser;

import java.io.DataInput;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Arrays;

import com.google.common.io.LittleEndianDataInputStream;

import de.johni0702.api.noteblock.song.Instrument;
import de.johni0702.api.noteblock.song.Layer;
import de.johni0702.api.noteblock.song.Note;
import de.johni0702.api.noteblock.song.NotePitch;
import de.johni0702.api.noteblock.song.Song;

public class NbsParser implements Parser {

    @Override
    public Song parseFile(File file) throws IOException {
        FileInputStream inputStream = new FileInputStream(file);
        DataInput in = new LittleEndianDataInputStream(inputStream);

        int length = in.readShort();
        int height = in.readShort();
        String name = readString(in);
        String author = readString(in);
        String originalAuthor = readString(in);
        String description = readString(in);
        double tempo = in.readShort() / 100d;
        in.skipBytes(23);
        in.skipBytes(in.readInt());

        Layer[] layers = new Layer[height];
        for (int i = 0; i < layers.length; i++) {
            layers[i] = new Layer();
        }

        int jump;
        int tick = -1;
        while ((jump = in.readShort()) != 0) {
            tick += jump;
            int layer = -1;
            while ((jump = in.readShort()) != 0) {
                layer += jump;

                Instrument instrument = Instrument.forId(in.readByte());
                NotePitch pitch = notePitchForId((in.readByte() - 33) % 24);

                layers[layer].setNoteBlock(tick, new Note(instrument, pitch));
            }
        }

        for (Layer layer : layers) {
            layer.setName(readString(in));
            layer.setVolume(in.readByte() / 100d);
        }

        Song song = new Song(length, name, author, originalAuthor, description, tempo);
        song.getLayers().addAll(Arrays.asList(layers));
        return song;
    }

    private NotePitch notePitchForId(int id) {
        NotePitch result = null;
        int i = 0;
        for (NotePitch pitch : NotePitch.values()) {
            if (pitch.toString().equalsIgnoreCase("NOTE_" + i)) {
                result = pitch;
                break;
            }
            i++;
        }
        return result;
    }

    private String readString(DataInput in) throws IOException {
        byte[] buf = new byte[in.readInt()];
        in.readFully(buf);
        return new String(buf);
    }

}