Java tutorial
/** * Copyright 2014 Comcast Cable Communications Management, LLC * * This file is part of CATS. * * CATS 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. * * CATS 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 CATS. If not, see <http://www.gnu.org/licenses/>. */ package com.comcast.cats.video.service; import java.awt.Dimension; import java.awt.image.BufferedImage; import java.io.File; import java.net.MalformedURLException; import java.net.URI; import java.text.SimpleDateFormat; import java.util.Date; import java.util.List; import javax.imageio.ImageIO; import org.apache.commons.io.FileUtils; import org.apache.log4j.Logger; import com.comcast.cats.Settop; import com.comcast.cats.event.CatsEventDispatcher; import com.comcast.cats.provider.VideoProvider; /** * * A simple EJB service that can affect the video to a STB based on the path * to the video device. * * @author jtyrre001 * */ public class VideoServiceImpl implements VideoProvider { private static final long serialVersionUID = 1L; private static final Logger logger = Logger.getLogger(VideoServiceImpl.class); private static final String IMAGE_FILE_FORMAT = "jpg"; private static final String DATE_TIME_FORMAT = "yyyy.MM.dd-HH.mm.ss"; /** * */ private Object parentObj; /** * VideoController object. */ private final VideoController videoController; /** * VideoServiceImpl constructor. * Instantiates an videoController instance. * @throws MalformedURLException */ public VideoServiceImpl(final CatsEventDispatcher dispatcher, final URI videoLocator) throws MalformedURLException { if (dispatcher == null || videoLocator == null) { throw new IllegalArgumentException("CatsEventDispatcher and Video Locator must not be null"); } this.videoController = new VideoController(dispatcher, videoLocator, this); } /** * Returns an ArrayList of available video sizes retrieved from the Axis Device. * First column is resolution id: D1, 4CIF, CIF etc. * Second column is resolution: 720 x 480 etc. * * @return vidSizelist Table list of all available video sizes */ public List<String> getAvailableVideoSizes() { return (List<String>) videoController.getAvailableVideoSizes(); } /** * Sets the video size requested by the client. * * @param vidSize Video Size / dimension of screen. */ public void setVideoSize(final Dimension vidSize) { this.videoController.setVideoDimension(vidSize); if (this.videoController.isConnected()) { try { this.videoController.connect(); } catch (MalformedURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } /** * Sets the frame read rate from the incoming stream. * * @param fps frame rate in frames/per second */ public void setFrameRate(final Integer fps) { videoController.setFrameRate(fps); } /** * Returns the frame read rate from the incoming stream. * * @return rate frame rate in frames/per second */ public Integer getFrameRate() { return videoController.getFrameRate(); } /** * Returns the current video streaming dimensions. */ @Override public Dimension getVideoSize() { return videoController.getVideoDimension(); } /** * Returns the URI of the Axis Server device. * * @return URI axis server URI */ public URI getVideoLocator() { return videoController.getVideoLocator(); } /** * Returns streaming status of server true or false. * * @return videoController.isStreaming() */ public boolean isStreaming() { return this.videoController.isStreaming(); } /** * Returns connect status to Axis Server true or false. * * @return videoController.isConnected() */ public boolean isConnected() { return this.videoController.isConnected(); } /** * Makes the HTTP connection to the Axis Server device. */ public void connectVideoServer() { try { videoController.connect(); } catch (MalformedURLException e) { e.printStackTrace(); } } /** * Disconnects from the Axis Server device. * Note: A disconnect automatically stop streaming video. */ public void disconnectVideoServer() { this.videoController.disconnectFromAxisDevice(); } /** * Gets a still video image from the Axis Camera. * * @return BufferedImage */ @Override public BufferedImage getVideoImage() { return this.videoController.getImage(); } /** * Gets a still video image from the Axis Camera. * * @return BufferedImage */ @Override public BufferedImage getVideoImage(Dimension dim) { return this.videoController.getImage(dim); } public void setParent(Object parent) { this.parentObj = parent; } @Override public Object getParent() { return this.parentObj; } @Override public String getVideoURL() { return videoController.getURL(); } @Override public String saveVideoImage() { String fileLocation = null; String catsHome = System.getProperty("cats.home"); if (null != catsHome) { fileLocation = catsHome + System.getProperty("file.separator") + getFolderAndFileName(); saveVideoImage(fileLocation); } else { logger.error("CATS HOME is not set. Saving Image cannot continue"); } return fileLocation; } @Override public void saveVideoImage(String filePath) { if (null == filePath || filePath.isEmpty()) { logger.error("Saving video image failed. The file location cannot be null or empty: " + filePath); } else { String imagePath = filePath; File imagefile = new File(imagePath); // If the file path specified is a relative path, the image must be saved in to CATS_HOME/$macFolder/<filePath> if (!imagefile.isAbsolute()) { String catsHome = System.getProperty("cats.home"); if (null != catsHome) { imagePath = catsHome + System.getProperty("file.separator") + getCleanMac() + System.getProperty("file.separator") + imagePath; } imagefile = new File(imagePath); } /** * If the specified file path is of an existing directory, the image will be saved in to * <filepath>/$macFolder/$defaultFileName.jpg */ if (imagefile.exists() && imagefile.isDirectory()) { imagePath = imagePath + System.getProperty("file.separator") + getFolderAndFileName(); imagefile = new File(imagePath); } try { FileUtils.forceMkdir(imagefile.getAbsoluteFile().getParentFile()); ImageIO.write(getVideoImage(), IMAGE_FILE_FORMAT, imagefile); logger.info("Saved video image to file: " + imagefile.getAbsolutePath()); } catch (Exception e) { logger.error("Saving video image failed. Error in creating file: '" + imagePath + "'.\n" + e.getMessage()); } } } private String getFolderAndFileName() { Date date = new Date(); SimpleDateFormat dateFormat = new SimpleDateFormat(DATE_TIME_FORMAT); String dateString = dateFormat.format(date); return getCleanMac() + System.getProperty("file.separator") + dateString + "." + IMAGE_FILE_FORMAT; } private String getCleanMac() { String cleanMac = ""; if (null != getParent()) { try { Settop settop = (Settop) getParent(); String hostMacAddress = settop.getHostMacAddress(); cleanMac = hostMacAddress.trim().replace(":", "").toUpperCase(); } catch (ClassCastException e) { logger.error("VideoProvider doesn't have a parent settop."); } } return cleanMac; } }