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
30/** Java version of cricket::VideoCapturer. */
31public class VideoCapturer {
32  private long nativeVideoCapturer;
33
34  private VideoCapturer(long nativeVideoCapturer) {
35    this.nativeVideoCapturer = nativeVideoCapturer;
36  }
37
38  public static VideoCapturer create(String deviceName) {
39    long nativeVideoCapturer = nativeCreateVideoCapturer(deviceName);
40    if (nativeVideoCapturer == 0) {
41      return null;
42    }
43    return new VideoCapturer(nativeVideoCapturer);
44  }
45
46  // Package-visible for PeerConnectionFactory.
47  long takeNativeVideoCapturer() {
48    if (nativeVideoCapturer == 0) {
49      throw new RuntimeException("Capturer can only be taken once!");
50    }
51    long ret = nativeVideoCapturer;
52    nativeVideoCapturer = 0;
53    return ret;
54  }
55
56  public void dispose() {
57    // No-op iff this capturer is owned by a source (see comment on
58    // PeerConnectionFactoryInterface::CreateVideoSource()).
59    if (nativeVideoCapturer != 0) {
60      free(nativeVideoCapturer);
61    }
62  }
63
64  private static native long nativeCreateVideoCapturer(String deviceName);
65
66  private static native void free(long nativeVideoCapturer);
67}
68