uk.co.modularaudio.mads.base.sampleplayer.ui.SingleSamplePlayerSelectFileUiJComponent.java Source code

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Here is the source code for uk.co.modularaudio.mads.base.sampleplayer.ui.SingleSamplePlayerSelectFileUiJComponent.java

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/**
 *
 * Copyright (C) 2015 - Daniel Hams, Modular Audio Limited
 *                      daniel.hams@gmail.com
 *
 * Mad 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 3 of the License, or
 * (at your option) any later version.
 *
 * Mad 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 Mad.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package uk.co.modularaudio.mads.base.sampleplayer.ui;

import java.awt.event.ActionEvent;
import java.io.File;

import javax.swing.JComponent;
import javax.swing.JFileChooser;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import uk.co.modularaudio.controller.advancedcomponents.AdvancedComponentsFrontController;
import uk.co.modularaudio.mads.base.sampleplayer.mu.SingleSamplePlayerMadDefinition;
import uk.co.modularaudio.mads.base.sampleplayer.mu.SingleSamplePlayerMadInstance;
import uk.co.modularaudio.mads.base.sampleplayer.mu.SingleSampleRuntime;
import uk.co.modularaudio.util.audio.gui.mad.IMadUiControlInstance;
import uk.co.modularaudio.util.audio.gui.madswingcontrols.PacButton;
import uk.co.modularaudio.util.audio.mad.ioqueue.ThreadSpecificTemporaryEventStorage;
import uk.co.modularaudio.util.audio.mad.timing.MadTimingParameters;

public class SingleSamplePlayerSelectFileUiJComponent extends PacButton implements
        IMadUiControlInstance<SingleSamplePlayerMadDefinition, SingleSamplePlayerMadInstance, SingleSamplePlayerMadUiInstance> {
    private static final long serialVersionUID = 6068897521037173787L;

    // Wait up to twenty milliseconds for the new sample to be used.
    private static final long WAIT_TO_SWAP_NANOS = 1000 * 1000 * 20;

    private static Log log = LogFactory.getLog(SingleSamplePlayerSelectFileUiJComponent.class.getName());

    private String lastUsedFilePath;

    private final SingleSamplePlayerMadInstance instance;

    private final AdvancedComponentsFrontController advancedComponentsFrontController;

    public SingleSamplePlayerSelectFileUiJComponent(final SingleSamplePlayerMadDefinition definition,
            final SingleSamplePlayerMadInstance instance, final SingleSamplePlayerMadUiInstance uiInstance,
            final int controlIndex) {
        this.instance = instance;

        this.advancedComponentsFrontController = instance.advancedComponentsFrontController;
        this.setOpaque(false);
        setFont(this.getFont().deriveFont(9f));
        this.setText("/\\");
    }

    @Override
    public JComponent getControl() {
        return this;
    }

    private void passChangeToInstanceData(final String filename) {
        lastUsedFilePath = filename;
        try {
            // First start caching the new sample
            final SingleSampleRuntime sampleRuntime = new SingleSampleRuntime(advancedComponentsFrontController,
                    filename);

            final SingleSampleRuntime previousSampleRuntime = instance.desiredSampleRuntime.get();
            // Push the new one
            instance.desiredSampleRuntime.set(sampleRuntime);

            // Wait until it's marked as used.
            final long startTime = System.nanoTime();
            long curTime;
            boolean wasUsed;
            do {
                curTime = System.nanoTime();
                wasUsed = sampleRuntime.isUsed();
            } while (wasUsed == false && curTime < (startTime + WAIT_TO_SWAP_NANOS));

            if (previousSampleRuntime != null) {
                // Now we can de-allocate the previous clients
                previousSampleRuntime.destroy();
            }
        } catch (final Exception e) {
            final String msg = "Exception caught attempting to use new sample file in sample player: "
                    + e.toString();
            log.error(msg, e);
        }

    }

    @Override
    public void doDisplayProcessing(final ThreadSpecificTemporaryEventStorage tempEventStorage,
            final MadTimingParameters timingParameters, final long currentGuiTime) {
        // log.debug("Received display tick");
    }

    @Override
    public void receiveEvent(final ActionEvent e) {
        final JFileChooser openFileChooser = new JFileChooser();
        final String musicDir = advancedComponentsFrontController.getSoundfileMusicRoot();
        openFileChooser.setCurrentDirectory(new File(musicDir));
        final int retVal = openFileChooser.showOpenDialog(this);
        if (retVal == JFileChooser.APPROVE_OPTION) {
            // Store the directory we navigated to so next open uses it. Will be
            // specific to the control instance of course
            final File f = openFileChooser.getSelectedFile();

            if (f != null) {
                if (log.isDebugEnabled()) {
                    log.debug("Attempting to use audio file " + f.getPath());
                }
                passChangeToInstanceData(f.getAbsolutePath());
            }
        }
    }

    @Override
    public String getControlValue() {
        return (lastUsedFilePath != null ? lastUsedFilePath : "");
    }

    @Override
    public void receiveControlValue(final String value) {
        if (value != null && !value.equals("")) {
            passChangeToInstanceData(value);
        }
    }

    @Override
    public void destroy() {
    }

    @Override
    public boolean needsDisplayProcessing() {
        return false;
    }
}