talk/app/webrtc/java/src/org/webrtc/VideoTrack.java

/*
 * libjingle
 * Copyright 2013 Google Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.webrtc;

import java.util.LinkedList;

/** Java version of VideoTrackInterface. */
public class VideoTrack extends MediaStreamTrack {
  private final LinkedList<VideoRenderer> renderers =
      new LinkedList<VideoRenderer>();

  public VideoTrack(long nativeTrack) {
    super(nativeTrack);
  }

  public void addRenderer(VideoRenderer renderer) {
    renderers.add(renderer);
    nativeAddRenderer(nativeTrack, renderer.nativeVideoRenderer);
  }

  public void removeRenderer(VideoRenderer renderer) {
    if (!renderers.remove(renderer)) {
      return;
    }
    nativeRemoveRenderer(nativeTrack, renderer.nativeVideoRenderer);
    renderer.dispose();
  }

  public void dispose() {
    while (!renderers.isEmpty()) {
      removeRenderer(renderers.getFirst());
    }
    super.dispose();
  }

  private static native void free(long nativeTrack);

  private static native void nativeAddRenderer(
      long nativeTrack, long nativeRenderer);

  private static native void nativeRemoveRenderer(
      long nativeTrack, long nativeRenderer);
}