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WebRTC one to one video call with recording and filtering
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/*
 * (C) Copyright 2014 Kurento (http://kurento.org/)
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kurento.tutorial.one2onecalladv;

import java.text.SimpleDateFormat;
import java.util.Date;

import org.kurento.client.FaceOverlayFilter;
import org.kurento.client.KurentoClient;
import org.kurento.client.MediaPipeline;
import org.kurento.client.RecorderEndpoint;
import org.kurento.client.WebRtcEndpoint;

/**
 * Media Pipeline (connection of Media Elements) for the advanced one to one video communication.
 * 
 * @author Boni Garcia ([email protected])
 * @author Micael Gallego ([email protected])
 * @since 5.0.0
 */
public class CallMediaPipeline {

  private static final SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss-S");
  public static final String RECORDING_PATH = "file:///tmp/" + df.format(new Date()) + "-";
  public static final String RECORDING_EXT = ".webm";

  private final MediaPipeline pipeline;
  private final WebRtcEndpoint webRtcCaller;
  private final WebRtcEndpoint webRtcCallee;
  private final RecorderEndpoint recorderCaller;
  private final RecorderEndpoint recorderCallee;

  public CallMediaPipeline(KurentoClient kurento, String from, String to) {

    // Media pipeline
    pipeline = kurento.createMediaPipeline();

    // Media Elements (WebRtcEndpoint, RecorderEndpoint, FaceOverlayFilter)
    webRtcCaller = new WebRtcEndpoint.Builder(pipeline).build();
    webRtcCallee = new WebRtcEndpoint.Builder(pipeline).build();

    recorderCaller = new RecorderEndpoint.Builder(pipeline, RECORDING_PATH + from + RECORDING_EXT)
        .build();
    recorderCallee = new RecorderEndpoint.Builder(pipeline, RECORDING_PATH + to + RECORDING_EXT)
        .build();

    String appServerUrl = System.getProperty("app.server.url",
        One2OneCallAdvApp.DEFAULT_APP_SERVER_URL);
    FaceOverlayFilter faceOverlayFilterCaller = new FaceOverlayFilter.Builder(pipeline).build();
    faceOverlayFilterCaller.setOverlayedImage(appServerUrl + "/img/mario-wings.png", -0.35F, -1.2F,
        1.6F, 1.6F);

    FaceOverlayFilter faceOverlayFilterCallee = new FaceOverlayFilter.Builder(pipeline).build();
    faceOverlayFilterCallee.setOverlayedImage(appServerUrl + "/img/Hat.png", -0.2F, -1.35F, 1.5F,
        1.5F);

    // Connections
    webRtcCaller.connect(faceOverlayFilterCaller);
    faceOverlayFilterCaller.connect(webRtcCallee);
    faceOverlayFilterCaller.connect(recorderCaller);

    webRtcCallee.connect(faceOverlayFilterCallee);
    faceOverlayFilterCallee.connect(webRtcCaller);
    faceOverlayFilterCallee.connect(recorderCallee);
  }

  public void record() {
    recorderCaller.record();
    recorderCallee.record();
  }

  public String generateSdpAnswerForCaller(String sdpOffer) {
    return webRtcCaller.processOffer(sdpOffer);
  }

  public String generateSdpAnswerForCallee(String sdpOffer) {
    return webRtcCallee.processOffer(sdpOffer);
  }

  public MediaPipeline getPipeline() {
    return pipeline;
  }

  public WebRtcEndpoint getCallerWebRtcEp() {
    return webRtcCaller;
  }

  public WebRtcEndpoint getCalleeWebRtcEp() {
    return webRtcCallee;
  }
}