JVST provides an interface to VST plugins (effects and instruments) for use in Java. It allows the developer to interact with a plugin, process samples and use any built in GUIs.

JVST is licensed under the Common Public License (CPL).

The latest download is available from the Project Page.

Example code that loads a VST plugin and interacts with it:

import org.boris.jvst.*;

public class JVSTExample
{
    public static void main(String[] args) throws Exception {
        AEffect a = VST.load("F:/VST/mda Delay.dll");
        a.open();
        a.setSampleRate(44100.0f);
        a.setBlockSize(512);

        // attempt some processing
        int blocksize = 512;
        float[][] inputs = new float[a.numInputs][];
        for (int i = 0; i < a.numInputs; i++) {
            inputs[i] = new float[blocksize];
            for (int j = 0; j < blocksize; j++)
                inputs[i][j] = (float) Math
                        .sin(j * Math.PI * 2 * 440 / 44100.0);
        }
        float[][] outputs = new float[a.numOutputs][];
        for (int i = 0; i < a.numOutputs; i++) {
            outputs[i] = new float[blocksize];
            for (int j = 0; j < blocksize; j++)
                outputs[i][j] = 0;
        }

        a.processReplacing(inputs, outputs, blocksize);

        VST.dispose(a);
    }
}

Example code that loads a VST plugin and displays it's GUI:

package org.boris.jvst;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.window.ApplicationWindow;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;

public class MiniHost extends ApplicationWindow
{
    public static void main(String[] args) throws Exception {
        AEffect effect = VST.load("F:/VST/LiveCut.dll");
        MiniHost m = new MiniHost(effect);
        m.setBlockOnOpen(true);
        m.open();
    }

    private AEffect effect;

    protected Control createContents(Composite parent) {
        // Startup the plugin
        effect.open();
        // Ask the plugin to display its GUI using the SWT window handle
        effect.editOpen(parent.handle);
        // Get the size of the GUI
        ERect r = effect.editGetRect();
        // Reconfigure our shell to fit the size
        setShellSize(r, parent.getShell());
        return null;
    }

    public static void setShellSize(ERect r, Shell shell) {
        int trim = shell.getSize().y - shell.getClientArea().height;
        shell.setSize(r.right - r.left + 5, r.bottom - r.top + trim);
    }

    public MiniHost(AEffect effect) {
        super(null);
        this.effect = effect;
    }

    protected void configureShell(Shell shell) {
        super.configureShell(shell);
        shell.setBounds(100, 100, 640, 400);
        shell.setImage(ImageDescriptor.createFromFile(null, "site/logo.gif")
                .createImage());
        shell.setText("JVST MiniHost Example");
    }
}

The output screenshot looks like:

V0.0.1

• Initial version.