1/*
2 * libjingle
3 * Copyright 2013, Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 *  1. Redistributions of source code must retain the above copyright notice,
9 *     this list of conditions and the following disclaimer.
10 *  2. Redistributions in binary form must reproduce the above copyright notice,
11 *     this list of conditions and the following disclaimer in the documentation
12 *     and/or other materials provided with the distribution.
13 *  3. The name of the author may not be used to endorse or promote products
14 *     derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28package org.webrtc;
29
30import java.util.LinkedList;
31
32/** Java wrapper for a C++ MediaStreamInterface. */
33public class MediaStream {
34  public final LinkedList<AudioTrack> audioTracks;
35  public final LinkedList<VideoTrack> videoTracks;
36  // Package-protected for PeerConnection.
37  final long nativeStream;
38
39  public MediaStream(long nativeStream) {
40    audioTracks = new LinkedList<AudioTrack>();
41    videoTracks = new LinkedList<VideoTrack>();
42    this.nativeStream = nativeStream;
43  }
44
45  public boolean addTrack(AudioTrack track) {
46    if (nativeAddAudioTrack(nativeStream, track.nativeTrack)) {
47      audioTracks.add(track);
48      return true;
49    }
50    return false;
51  }
52
53  public boolean addTrack(VideoTrack track) {
54    if (nativeAddVideoTrack(nativeStream, track.nativeTrack)) {
55      videoTracks.add(track);
56      return true;
57    }
58    return false;
59  }
60
61  public boolean removeTrack(AudioTrack track) {
62    if (nativeRemoveAudioTrack(nativeStream, track.nativeTrack)) {
63      audioTracks.remove(track);
64      return true;
65    }
66    return false;
67  }
68
69  public boolean removeTrack(VideoTrack track) {
70    if (nativeRemoveVideoTrack(nativeStream, track.nativeTrack)) {
71      videoTracks.remove(track);
72      return true;
73    }
74    return false;
75  }
76
77  public void dispose() {
78    while (!audioTracks.isEmpty()) {
79      AudioTrack track = audioTracks.getFirst();
80      removeTrack(track);
81      track.dispose();
82    }
83    while (!videoTracks.isEmpty()) {
84      VideoTrack track = videoTracks.getFirst();
85      removeTrack(track);
86      track.dispose();
87    }
88    free(nativeStream);
89  }
90
91  public String label() {
92    return nativeLabel(nativeStream);
93  }
94
95  public String toString() {
96    return "[" + label() + ":A=" + audioTracks.size() +
97        ":V=" + videoTracks.size() + "]";
98  }
99
100  private static native boolean nativeAddAudioTrack(
101      long nativeStream, long nativeAudioTrack);
102
103  private static native boolean nativeAddVideoTrack(
104      long nativeStream, long nativeVideoTrack);
105
106  private static native boolean nativeRemoveAudioTrack(
107      long nativeStream, long nativeAudioTrack);
108
109  private static native boolean nativeRemoveVideoTrack(
110      long nativeStream, long nativeVideoTrack);
111
112  private static native String nativeLabel(long nativeStream);
113
114  private static native void free(long nativeStream);
115}
116