/**
 * This package provides classes to handle video in Processing. The API is compatible with the built-in video library of Processing. 
 * GSVideo uses the multimedia toolkit GStreamer (http://www.gstreamer.net/)  through the gstreamer-java bindings by Wayne Meissener:
 * http://code.google.com/p/gstreamer-java/ 
 * @author Andres Colubri
 * @version 0.8
 *
 * Copyright (c) 2008 Andres Colubri
 *
 * This source 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 code 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.
 * 
 * A copy of the GNU General Public License is available on the World
 * Wide Web at <http://www.gnu.org/copyleft/gpl.html>. You can also
 * obtain it by writing to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

package codeanticode.gsvideo;

import java.net.URL;

import com.sun.jna.Platform;

class GSLibraryPath {
  // This method returns the folder inside which the gstreamer library folder
  // should be located.
  String get() {
    URL url = this.getClass().getResource("GSLibraryPath.class");
    if (url != null) {
      // Convert URL to string, taking care of spaces represented by the "%20"
      // string.
      String path = url.toString().replace("%20", " ");
      int n0 = path.indexOf('/');

      int n1 = -1;
      if (Platform.isWindows()) {
        n1 = path.indexOf("/lib/GSVideo.jar"); // location of GSVideo.jar in
                                               // exported apps.
        if (n1 == -1)
          n1 = path.indexOf("/GSVideo.jar"); // location of GSVideo.jar in
                                             // library folder.

        // In Windows, path string starts with "jar file/C:/..."
        // so the substring up to the first / is removed.
        n0++;
      } else if (Platform.isMac()) {
        // In Mac, getting the index of GSVideo.jar is enough in the case of sketches running from the PDE
        // as well as exported applications.
        n1 = path.indexOf("GSVideo.jar");        
      } else if (Platform.isLinux()) {
        // TODO: what's up?
      }

      if ((-1 < n0) && (-1 < n1)) {
        return path.substring(n0, n1);
      } else {
        return "";
      }
    }
    return "";
  }
}