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/*
* Copyright 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
package org.webrtc;
import java.util.IdentityHashMap;
/** Java version of VideoTrackInterface. */
public class VideoTrack extends MediaStreamTrack {
private final IdentityHashMap<VideoSink, Long> sinks = new IdentityHashMap<VideoSink, Long>();
public VideoTrack(long nativeTrack) {
super(nativeTrack);
}
/**
* Adds a VideoSink to the track.
*
* A track can have any number of VideoSinks. VideoSinks will replace
* renderers. However, converting old style texture frames will involve costly
* conversion to I420 so it is not recommended to upgrade before all your
* sources produce VideoFrames.
*/
public void addSink(VideoSink sink) {
if (sink == null) {
throw new IllegalArgumentException("The VideoSink is not allowed to be null");
}
// We allow calling addSink() with the same sink multiple times. This is similar to the C++
// VideoTrack::AddOrUpdateSink().
if (!sinks.containsKey(sink)) {
final long nativeSink = nativeWrapSink(sink);
sinks.put(sink, nativeSink);
nativeAddSink(getNativeMediaStreamTrack(), nativeSink);
}
}
/**
* Removes a VideoSink from the track.
*
* If the VideoSink was not attached to the track, this is a no-op.
*/
public void removeSink(VideoSink sink) {
final Long nativeSink = sinks.remove(sink);
if (nativeSink != null) {
nativeRemoveSink(getNativeMediaStreamTrack(), nativeSink);
nativeFreeSink(nativeSink);
}
}
@Override
public void dispose() {
for (long nativeSink : sinks.values()) {
nativeRemoveSink(getNativeMediaStreamTrack(), nativeSink);
nativeFreeSink(nativeSink);
}
sinks.clear();
super.dispose();
}
/** Returns a pointer to webrtc::VideoTrackInterface. */
long getNativeVideoTrack() {
return getNativeMediaStreamTrack();
}
private static native void nativeAddSink(long track, long nativeSink);
private static native void nativeRemoveSink(long track, long nativeSink);
private static native long nativeWrapSink(VideoSink sink);
private static native void nativeFreeSink(long sink);
}
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