InputSource.java

/*
 *  21.04.2004 Original verion. davagin@udm.ru.
 *-----------------------------------------------------------------------
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *----------------------------------------------------------------------
 */
package davaguine.jmac.info;

import davaguine.jmac.tools.ByteBuffer;
import davaguine.jmac.tools.File;
import davaguine.jmac.tools.IntegerPointer;
import davaguine.jmac.tools.JMACException;

import java.io.IOException;

/**
 * Author: Dmitry Vaguine
 * Date: 07.05.2004
 * Time: 14:07:31
 */
public abstract class InputSource {
    // construction / destruction
    public InputSource(File pIO, WaveFormat pwfeSource, IntegerPointer pTotalBlocks, IntegerPointer pHeaderBytes, IntegerPointer pTerminatingBytes) throws IOException {
    }

    public InputSource(String pSourceName, WaveFormat pwfeSource, IntegerPointer pTotalBlocks, IntegerPointer pHeaderBytes, IntegerPointer pTerminatingBytes) throws IOException {
    }

    // get data
    public abstract int GetData(ByteBuffer pBuffer, int nBlocks) throws IOException;

    // get header / terminating data
    public abstract void GetHeaderData(byte[] pBuffer) throws IOException;

    public abstract void GetTerminatingData(byte[] pBuffer) throws IOException;

    public abstract void Close() throws IOException;

    public static InputSource CreateInputSource(String pSourceName, WaveFormat pwfeSource, IntegerPointer pTotalBlocks, IntegerPointer pHeaderBytes, IntegerPointer pTerminatingBytes) throws IOException {
        // error check the parameters
        if ((pSourceName == null) || (pSourceName.length() == 0))
            throw new JMACException("Bad Parameters");

        // get the extension
        int index = pSourceName.lastIndexOf('.');
        String pExtension = "";
        if (index >= 0)
            pExtension = pSourceName.substring(pSourceName.lastIndexOf('.'));

        // create the proper input source
        if (pExtension.toLowerCase().equals(".wav")) {
            return new WAVInputSource(pSourceName, pwfeSource, pTotalBlocks, pHeaderBytes, pTerminatingBytes);
        } else
            throw new JMACException("Invalid Input File");
    }
}