Java tutorial
/* * (C) Copyright 2014 Kurento (http://kurento.org/) * * All rights reserved. This program and the accompanying materials * are made available under the terms of the GNU Lesser General Public License * (LGPL) version 2.1 which accompanies this distribution, and is available at * http://www.gnu.org/licenses/lgpl-2.1.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. See the GNU * Lesser General Public License for more details. * */ package com.kurento.demo.crowddetector; import static com.google.common.collect.Lists.newArrayList; import static java.lang.reflect.Modifier.TRANSIENT; import java.util.ArrayList; import java.util.List; import com.google.gson.Gson; import com.google.gson.GsonBuilder; import com.google.gson.JsonArray; import com.google.gson.JsonObject; import com.kurento.kmf.content.ContentCommand; import com.kurento.kmf.content.ContentCommandResult; import com.kurento.kmf.content.ContentEvent; import com.kurento.kmf.content.WebRtcContentHandler; import com.kurento.kmf.content.WebRtcContentService; import com.kurento.kmf.content.WebRtcContentSession; import com.kurento.kmf.media.CrowdDetectorFilter; import com.kurento.kmf.media.MediaPipeline; import com.kurento.kmf.media.PlayerEndpoint; import com.kurento.kmf.media.RegionOfInterest; import com.kurento.kmf.media.RegionOfInterestConfig; import com.kurento.kmf.media.RelativePoint; import com.kurento.kmf.media.WebRtcEndpoint; import com.kurento.kmf.media.events.CrowdDetectorDirectionEvent; import com.kurento.kmf.media.events.CrowdDetectorFluidityEvent; import com.kurento.kmf.media.events.CrowdDetectorOccupancyEvent; import com.kurento.kmf.media.events.MediaEventListener; import com.kurento.kmf.media.factory.MediaPipelineFactory; /** * Crowd detector demo. * * @author David Fernndez (d.fernandezlop@gmail.com) * @since 4.0.1 */ @WebRtcContentService(path = "/crowdDetector/*") public class CrowdDetectorDemo extends WebRtcContentHandler { CrowdDetectorFilter crowdDetector; PlayerEndpoint playerendpoint; MediaPipeline mediaPipeline; WebRtcEndpoint webRtcEndpoint; private static final Gson gson = new GsonBuilder().excludeFieldsWithModifiers(TRANSIENT).create(); @Override public void onContentRequest(final WebRtcContentSession contentSession) throws Exception { contentSession.start(webRtcEndpoint); } @Override public ContentCommandResult onContentCommand(final WebRtcContentSession contentSession, ContentCommand contentCommand) throws Exception { if ("configureFilter".equalsIgnoreCase(contentCommand.getType())) { if (crowdDetector == null) { MediaPipelineFactory mpf; mpf = contentSession.getMediaPipelineFactory(); mediaPipeline = mpf.create(); contentSession.releaseOnTerminate(mediaPipeline); webRtcEndpoint = mediaPipeline.newWebRtcEndpoint().build(); // create PlayerEndpoint playerendpoint = mediaPipeline.newPlayerEndpoint("http://files.kurento.org/video/crowd_long.avi") .build(); JsonArray readedRois = gson.fromJson(contentCommand.getData(), JsonArray.class); List<RegionOfInterest> rois = newArrayList(); for (int j = 0; j < readedRois.size(); j++) { JsonObject roi = (JsonObject) readedRois.get(j); JsonArray coordenates = (JsonArray) roi.get("coordenates"); // create structure to configure crowddetector List<RelativePoint> points = new ArrayList<RelativePoint>(); for (int i = 0; i < coordenates.size(); i++) { JsonObject coordenate = (JsonObject) coordenates.get(i); float x = coordenate.getAsJsonPrimitive("x").getAsFloat(); float y = coordenate.getAsJsonPrimitive("y").getAsFloat(); points.add(new RelativePoint(x, y)); } RegionOfInterestConfig config = new RegionOfInterestConfig(); config.setFluidityLevelMin(roi.getAsJsonPrimitive("fluidityLevelMin").getAsInt()); config.setFluidityLevelMed(roi.getAsJsonPrimitive("fluidityLevelMed").getAsInt()); config.setFluidityLevelMax(roi.getAsJsonPrimitive("fluidityLevelMax").getAsInt()); config.setFluidityNumFramesToEvent( roi.getAsJsonPrimitive("fluidityNumFramesToEvent").getAsInt()); config.setOccupancyLevelMin(roi.getAsJsonPrimitive("occupancyLevelMin").getAsInt()); config.setOccupancyLevelMed(roi.getAsJsonPrimitive("occupancyLevelMed").getAsInt()); config.setOccupancyLevelMax(roi.getAsJsonPrimitive("occupancyLevelMax").getAsInt()); config.setOccupancyNumFramesToEvent( roi.getAsJsonPrimitive("occupancyNumFramesToEvent").getAsInt()); if (roi.getAsJsonPrimitive("sendOpticalFlowEvent").getAsInt() == 0) { config.setSendOpticalFlowEvent(false); } else { config.setSendOpticalFlowEvent(true); } config.setOpticalFlowNumFramesToEvent( roi.getAsJsonPrimitive("opticalFlowNumFramesToEvents").getAsInt()); config.setOpticalFlowNumFramesToReset( roi.getAsJsonPrimitive("opticalFlowNumFramesToReset").getAsInt()); config.setOpticalFlowAngleOffset(roi.getAsJsonPrimitive("opticalFlowAngleOffset").getAsInt()); getLogger().info(config.toString()); rois.add(new RegionOfInterest(points, config, roi.getAsJsonPrimitive("id").getAsString())); } crowdDetector = mediaPipeline.newCrowdDetectorFilter(rois).build(); // connect elements playerendpoint.connect(crowdDetector); crowdDetector.connect(webRtcEndpoint); playerendpoint.play(); contentSession.publishEvent(new ContentEvent("startConn", "startConn")); // addEventListener to crowddetector crowdDetector .addCrowdDetectorDirectionListener(new MediaEventListener<CrowdDetectorDirectionEvent>() { @Override public void onEvent(CrowdDetectorDirectionEvent event) { String eventText = "Direction event detect in ROI " + event.getRoiID() + "with direction " + event.getDirectionAngle(); contentSession.publishEvent(new ContentEvent(event.getType(), eventText)); } }); crowdDetector .addCrowdDetectorFluidityListener(new MediaEventListener<CrowdDetectorFluidityEvent>() { @Override public void onEvent(CrowdDetectorFluidityEvent event) { String eventText = "Fluidity event detect in ROI " + event.getRoiID() + ". Fluidity level = " + event.getFluidityLevel() + " and fluidity percentage = " + event.getFluidityPercentage(); contentSession.publishEvent(new ContentEvent(event.getType(), eventText)); } }); crowdDetector .addCrowdDetectorOccupancyListener(new MediaEventListener<CrowdDetectorOccupancyEvent>() { @Override public void onEvent(CrowdDetectorOccupancyEvent event) { String eventText = "Occupancy event detect in ROI " + event.getRoiID() + ". Occupancy level = " + event.getOccupancyLevel() + " and occupancy percentage = " + event.getOccupancyPercentage(); contentSession.publishEvent(new ContentEvent(event.getType(), eventText)); } }); } } return new ContentCommandResult(contentCommand.getData()); } @Override public synchronized void onSessionTerminated(WebRtcContentSession session, int code, String reason) throws Exception { crowdDetector = null; super.onSessionTerminated(session, code, reason); } }