/*
* This file is part of Caliph & Emir.
*
* Caliph & Emir 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.
*
* Caliph & Emir 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 Caliph & Emir; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Copyright statement:
* --------------------
* (c) 2005 by Werner Klieber (werner@klieber.info)
* http://caliph-emir.sourceforge.net
*/
package at.wklieber.mpeg7;
import at.wklieber.tools.Console;
import at.wklieber.tools.Mpeg7MediaDuration;
import at.wklieber.tools.XmlTools;
import org.jdom.Document;
import org.jdom.Element;
import java.util.Iterator;
import java.util.List;
import java.util.Vector;
public class CameraMotionDs extends Mpeg7Template
implements DsInterface {
private static Console console = Console.getReference();
private static String XSI_MOTION_TYPE = "MixtureCameraMotionSegmentType";
private static String PATH_TIME_POINT = "MediaTime/MediaTimePoint";
private static String PATH_DURATION = "MediaTime/MediaDuration";
private static String PATH_FRACTIONAL = "FractionalPresence";
private static String PATH_MOTION = "AmountOfMotion";
public CameraMotionDs() {
super();
// offset in a complete mpeg7 document where this descriptor occusrs
// is used to extract data
// format no starting and leading separator, e.g. "Mpeg7/content"
// note: the offset strings are used also somewhere else
OFFSET_PATH = ROOT_TAG + "/Description/MultimediaContent/Video/VisualDescriptor";
// the name of the Desctipor
// this is the root tag name of this dom document
// format: no starting and leading separator, e.g. "DescriptionMetadata"
DESCRIPTOR_TAG = "Segment";
}
/**
* return the path where the description data begins
*/
public Element getOffsetForRoot() {
return simpleXpath(ROOT_TAG + "/Description", mpeg7Namespace, new Element("undefined"), false);
}
public void setDefaultValues() {
//super.setDefaultValues();
}
// this methode creats a new document tree - tructure
// with all tags that are unchanged by a "setData"
public void createTemplateDocument() {
super.createTemplateDocument();
//console.line();
setDomAttribute(ROOT_TAG + "/Description", mpeg7Namespace, "type", "ContentEntityType", xsiNamespace);
setDomAttribute(ROOT_TAG + "/Description/MultimediaContent", mpeg7Namespace, "type", "VideoType", xsiNamespace);
setDomAttribute(OFFSET_PATH, mpeg7Namespace, "type", "CameraMotionType", xsiNamespace);
setDomAttribute(OFFSET_PATH + "/" + DESCRIPTOR_TAG, mpeg7Namespace, "type", XSI_MOTION_TYPE, xsiNamespace);
} // end method
public void setData(String timePoint, String duration, String motionType,
String motionAmount) {
String offset = OFFSET_PATH + "/" + DESCRIPTOR_TAG + "/";
setDomValue(offset + PATH_TIME_POINT, mpeg7Namespace, timePoint, "");
setDomValue(offset + PATH_DURATION, mpeg7Namespace, Mpeg7MediaDuration.dateToMediaDuration(duration), "");
setDomValue(OFFSET_PATH + "/" + DESCRIPTOR_TAG + "/" + PATH_FRACTIONAL, mpeg7Namespace, "", "");
setDomValue(offset + PATH_MOTION + "/" + motionType, mpeg7Namespace, motionAmount, "");
}
public String getTimePoint() {
return getDomValue(OFFSET_PATH + "/" + DESCRIPTOR_TAG + "/" + PATH_TIME_POINT, "");
}
public String getDuration() {
return getDomValue(OFFSET_PATH + "/" + DESCRIPTOR_TAG + "/" + PATH_DURATION, "");
}
public String getMotionName() {
String returnValue = "";
java.util.List list = simpleXpath(OFFSET_PATH + "/" + DESCRIPTOR_TAG + "/" + PATH_MOTION, mpeg7Namespace, (Element) null, false).getChildren();
if (list.size() > 0) {
Element result = (Element) list.get(0);
if (result != null) {
returnValue = result.getName();
}
}
/* Element result = (Element) simpleXpath(OFFSET_PATH + "/" + DESCRIPTOR_TAG + "/" + PATH_MOTION, mpeg7Namespace, (Element) null, false).getChildren().get(0);
if (result != null) {
returnValue = result.getName();
}*/
return returnValue;
}
public String getMotionAmount() {
String returnValue = "";
java.util.List list = simpleXpath(OFFSET_PATH + "/" + DESCRIPTOR_TAG + "/" + PATH_MOTION, mpeg7Namespace, (Element) null, false).getChildren();
if (list.size() > 0) {
Element result = (Element) list.get(0);
if (result != null) {
returnValue = result.getText();
}
}
/*
Element result = (Element) simpleXpath(OFFSET_PATH + "/" + DESCRIPTOR_TAG + "/" + PATH_MOTION, mpeg7Namespace, (Element) null, false).getChildren().get(0);
if (result != null) {
returnValue = result.getText();
}
*/
return returnValue;
}
/**
* extract the Metadata description from a complete mpeg 7 document
*/
public List extractFromMpeg7(Document mpeg7Document) {
List returnValue = new Vector();
//Element rootElement = mpeg7Document.getRootElement();
this.document = mpeg7Document;
//String path = "/" + OFFSET_PATH + "/" + DESCRIPTOR_TAG;
String xPath = "//" + DESCRIPTOR_TAG + "[@xsi:type=\"" + XSI_MOTION_TYPE + "\"]";
logger.fine("DS read from: \"" + xPath + "\"");
List elementList = XmlTools.xpathQuery(mpeg7Document, xPath, xsiNamespace);
//logger.fine("e: " + elementList.size());
String offset = DESCRIPTOR_TAG + "/";
for (Iterator it = elementList.iterator(); it.hasNext();) {
Element elem = (Element) it.next();
// extract all needed data for setData
String startTimePoint = XmlTools.simpleXpath(elem, offset + PATH_TIME_POINT, mpeg7Namespace, new Element("dummy"), false).getText();
String duration = XmlTools.simpleXpath(elem, offset + PATH_DURATION, mpeg7Namespace, new Element("dummy"), false).getText();
String motionName = "";
String amountOfMotion = "";
java.util.List list = XmlTools.simpleXpath(elem, offset + PATH_MOTION, mpeg7Namespace, new Element("dummy"), false).getChildren();
if (list.size() > 0) {
Element motionElement = (Element) list.get(0);
if (motionElement != null) {
motionName = motionElement.getName();
amountOfMotion = motionElement.getText();
}
}
// generate a new Desciptor
CameraMotionDs descr = new CameraMotionDs();
descr.createTemplateDocument();
descr.setData(startTimePoint, duration, motionName, amountOfMotion);
// Mpeg7DateFormat.format(creationTime, null), creationPlace, toolName);
returnValue.add(descr);
//logger.fine("DS read: " + descr.toString());
}
return returnValue;
} // end method
} // end class