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 
28 package org.webrtc;
29 
30 /** Java version of cricket::VideoCapturer. */
31 public class VideoCapturer {
32   private long nativeVideoCapturer;
33 
VideoCapturer()34   protected VideoCapturer() {
35   }
36 
create(String deviceName)37   public static VideoCapturer create(String deviceName) {
38     Object capturer = nativeCreateVideoCapturer(deviceName);
39     if (capturer != null)
40       return (VideoCapturer) (capturer);
41     return null;
42   }
43 
44   // Sets |nativeCapturer| to be owned by VideoCapturer.
setNativeCapturer(long nativeCapturer)45   protected void setNativeCapturer(long nativeCapturer) {
46     this.nativeVideoCapturer = nativeCapturer;
47   }
48 
49   // Package-visible for PeerConnectionFactory.
takeNativeVideoCapturer()50   long takeNativeVideoCapturer() {
51     if (nativeVideoCapturer == 0) {
52       throw new RuntimeException("Capturer can only be taken once!");
53     }
54     long ret = nativeVideoCapturer;
55     nativeVideoCapturer = 0;
56     return ret;
57   }
58 
dispose()59   public void dispose() {
60     // No-op iff this capturer is owned by a source (see comment on
61     // PeerConnectionFactoryInterface::CreateVideoSource()).
62     if (nativeVideoCapturer != 0) {
63       free(nativeVideoCapturer);
64     }
65   }
66 
nativeCreateVideoCapturer(String deviceName)67   private static native Object nativeCreateVideoCapturer(String deviceName);
68 
free(long nativeVideoCapturer)69   private static native void free(long nativeVideoCapturer);
70 }
71