org.mwc.cmap.media.xuggle.NativeLibrariesLoader.java Source code

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Here is the source code for org.mwc.cmap.media.xuggle.NativeLibrariesLoader.java

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/*
 *    Debrief - the Open Source Maritime Analysis Application
 *    http://debrief.info
 *
 *    (C) 2000-2014, PlanetMayo Ltd
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the Eclipse Public License v1.0
 *    (http://www.eclipse.org/legal/epl-v10.html)
 *
 *    This library 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. 
 */
package org.mwc.cmap.media.xuggle;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.mwc.cmap.media.utility.OSUtils;
import org.osgi.framework.Bundle;

import com.xuggle.ferry.JNIHelper;

public class NativeLibrariesLoader {

    private static void cleanDirectory(File directory) {
        for (File child : directory.listFiles()) {
            if (child.isDirectory()) {
                cleanDirectory(child);
            }
            child.delete();
        }
    }

    public static void loadBundledXuggler(File nativeLibrariesDirectory, Bundle bundle) throws IOException {
        nativeLibrariesDirectory.mkdirs();
        cleanDirectory(nativeLibrariesDirectory);
        String nativePath = null;
        char versionSeparator = '-';
        if (OSUtils.WIN) {
            nativePath = OSUtils.IS_64BIT ? "/native/win64/" : "/native/win32/";
        }
        if (OSUtils.MAC && OSUtils.IS_64BIT) {
            nativePath = "/native/mac64/";
            versionSeparator = '.';
        }
        if (nativePath == null) {
            // we don't have bundled libraries for this os
            return;
        }
        InputStream loadOrderStream = bundle.getResource(nativePath + "load-order").openStream();
        try {
            List<String> loadOrder = IOUtils.readLines(loadOrderStream);
            for (String libraryToLoad : loadOrder) {
                libraryToLoad = libraryToLoad.trim();
                if (libraryToLoad.isEmpty()) {
                    continue;
                }
                File libraryFile = new File(nativeLibrariesDirectory, libraryToLoad);
                FileUtils.copyURLToFile(bundle.getResource(nativePath + libraryToLoad), libraryFile);
                String libraryName = libraryToLoad.substring(0, libraryToLoad.lastIndexOf('.'));
                if (libraryName.startsWith("lib")) {
                    libraryName = libraryName.substring(3);
                }
                int indexOfSeparator = libraryName.lastIndexOf(versionSeparator);
                long libraryVersion = 0;
                try {
                    libraryVersion = Long.parseLong(libraryName.substring(indexOfSeparator + 1));
                } catch (NumberFormatException ex) {
                    // ignore
                }
                libraryName = libraryName.substring(0, indexOfSeparator);
                System.load(libraryFile.getCanonicalPath());
                JNIHelper.setManuallyLoadedLibrary(libraryName, libraryVersion);
            }
        } finally {
            IOUtils.closeQuietly(loadOrderStream);
        }
    }

}