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/* DSSIMidiDeviceProvider.java -- DSSI Device Provider

   Copyright (C) 2005 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath 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, or (at your option)

any later version.

GNU Classpath 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 GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version. */

package gnu.javax.sound.midi.dssi;

import java.util.ArrayList;

import java.util.List;

import java.io.File;

import java.io.FilenameFilter;

import gnu.classpath.Configuration;

import javax.sound.midi.MidiDevice;

import javax.sound.midi.MidiDevice.Info;

import javax.sound.midi.spi.MidiDeviceProvider;

/**

 * A DSSI MIDI device provider.

 *

 * DSSI (pronounced "dizzy") is an API for audio plugins, with particular

 * application for software synthesis plugins with native user interfaces.

 *

 * Read about DSSI at http://dssi.sourceforge.net

 *

 * @author Anthony Green (green@redhat.com)

 *

 */

public class DSSIMidiDeviceProvider extends MidiDeviceProvider

{

  /**

   * The MidiDevice.Info specialized for DSSI synthesizers.

   *

   * @author Anthony Green (green@redhat.com)

   *

   */

  private static class DSSIInfo extends Info

  {

    String soname;

    long index;

    public DSSIInfo(String name, String vendor, String description,

                    String version, String soname, long index)

    {

      super(name, vendor, description, version);

      this.soname = soname;

      this.index = index;

    }

  }

  static native long dlopen_(String soname);

  static native void dlclose_(long sohandle);

  static native long getDSSIHandle_(long sohandle, long index);

  static native String getDSSIName_(long handle);

  static native String getDSSICopyright_(long handle);

  static native String getDSSIVendor_(long handle);

  static native String getDSSILabel_(long handle);

  private static List examineLibrary(String soname)

  {

     List list = new ArrayList();

     long index = 0;

     long handle;

     long sohandle = dlopen_(soname);

     if (sohandle == 0)

       return list;

     do

     {

       handle = getDSSIHandle_(sohandle, index);

       if (handle == 0)

         break;

       String name = getDSSILabel_(handle);

       String copyright = getDSSICopyright_(handle);

       String label = getDSSIName_(handle);

       String vendor = getDSSIVendor_(handle);

       list.add(new DSSIInfo(name, vendor, label,

                             "DSSI-1", soname, index));

       index++;

     } while (true);

     // Close the library and free memory

     dlclose_(sohandle);

     return list;

  }

  private static DSSIInfo[] infos;

  static

  {

    if (Configuration.INIT_LOAD_LIBRARY)

      System.loadLibrary("gjsmdssi");

    File dssidir = new File("/usr/lib/dssi/");

    String sofiles[] = dssidir.list(new FilenameFilter()

                                    {

                                      public boolean accept(File dir, String n)

                                      {

                                        return n.endsWith(".so");

                                      }

                                    });

    List ilist = new ArrayList();

    for (int i = 0; i < sofiles.length; i++)

      ilist.addAll(examineLibrary(new File(dssidir, sofiles[i]).getAbsolutePath()));

    infos = (DSSIInfo[]) ilist.toArray(new DSSIInfo[ilist.size()]);

  }

  public DSSIMidiDeviceProvider()

  {

    // Empty.

  }

  /* Return the Info array.

   * @see javax.sound.midi.spi.MidiDeviceProvider#getDeviceInfo()

   */

  public Info[] getDeviceInfo()

  {

    return infos;

  }

  /* Get a MIDI Device for info.

   * @see javax.sound.midi.spi.MidiDeviceProvider#getDevice(javax.sound.midi.MidiDevice.Info)

   */

  public MidiDevice getDevice(Info info)

  {

    for (int i = 0; i < infos.length; i++)

    {

      if (info.equals(infos[i]))

      {

          return new DSSISynthesizer(infos[i],

                                     infos[i].soname,

                                     infos[i].index);

      }

    }

    throw new IllegalArgumentException("Don't recognize MIDI device " + info);

  }

}