de.jarnbjo.vorbis.Mode Maven / Gradle / Ivy

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/*
 * $ProjectName$
 * $ProjectRevision$
 * -----------------------------------------------------------
 * $Id: Mode.java,v 1.2 2003/03/16 01:11:12 jarnbjo Exp $
 * -----------------------------------------------------------
 *
 * $Author: jarnbjo $
 *
 * Description:
 *
 * Copyright 2002-2003 Tor-Einar Jarnbjo
 * -----------------------------------------------------------
 *
 * Change History
 * -----------------------------------------------------------
 * $Log: Mode.java,v $
 * Revision 1.2  2003/03/16 01:11:12  jarnbjo
 * no message
 */
package de.jarnbjo.vorbis;

import de.jarnbjo.util.io.BitInputStream;
import java.io.IOException;

class Mode {
    final private boolean blockFlag;
    final private int windowType, transformType, mapping;

    protected Mode(BitInputStream source, SetupHeader header)
            throws IOException {
        blockFlag = source.getBit();
        windowType = source.getInt(16);
        transformType = source.getInt(16);
        mapping = source.getInt(8);

        if (windowType != 0) {
            throw new VorbisFormatException(
                    "Window type = " + windowType + ", != 0");
        }

        if (transformType != 0) {
            throw new VorbisFormatException(
                    "Transform type = " + transformType + ", != 0");
        }

        if (mapping > header.getMappings().length) {
            throw new VorbisFormatException("Mode mapping number is higher "
                    + "than total number of mappings.");
        }
    }

    protected boolean getBlockFlag() {
        return blockFlag;
    }

    protected int getWindowType() {
        return windowType;
    }

    protected int getTransformType() {
        return transformType;
    }

    protected int getMapping() {
        return mapping;
    }
}