1 /**
2 * This file Copyright (c) 2013-2018 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.dam.preview.xuggle;
35
36 import java.awt.image.BufferedImage;
37
38 import com.xuggle.mediatool.IMediaReader;
39 import com.xuggle.mediatool.MediaListenerAdapter;
40 import com.xuggle.mediatool.ToolFactory;
41 import com.xuggle.mediatool.event.IVideoPictureEvent;
42
43 /**
44 * Class to extract frame from video using Xuggle.
45 */
46 public class XuggleCaptureFrames extends MediaListenerAdapter {
47 private int mVideoStreamIndex = -1;
48 private boolean gotFirst = false;
49 private String videoFile;
50 private Exception e;
51 private BufferedImage image;
52
53 /**
54 * @param filename the name of the media file to read
55 */
56 public XuggleCaptureFrames(String videoFile) {
57 this.videoFile = videoFile;
58 this.e = null;
59 }
60
61 public BufferedImage execute() throws Exception {
62 IMediaReader reader = ToolFactory.makeReader(videoFile);
63
64 // BufferedImages created in BGR 24bit color space
65 reader.setBufferedImageTypeToGenerate(BufferedImage.TYPE_3BYTE_BGR);
66
67 // xuggle is event based
68 reader.addListener(this);
69
70 // read out the contents of the media file ... rest is done in listener
71 while (reader.readPacket() == null && !gotFirst) {
72 // nothing extra to do here
73 }
74
75 // re-throw exception if any
76 if (e != null) {
77 throw e;
78 }
79
80 return image;
81 }
82
83 /**
84 * Called after a video frame has been decoded from a media stream.
85 * This method blocks, so return quickly.
86 */
87 @Override
88 public void onVideoPicture(IVideoPictureEvent event) {
89 try {
90 // if the stream index does not match the selected stream index, then have a closer look
91 if (event.getStreamIndex() != mVideoStreamIndex) {
92 // if the selected video stream id is not yet set, go ahead an select this lucky video stream
93 if (-1 == mVideoStreamIndex) {
94 mVideoStreamIndex = event.getStreamIndex();
95 } else {
96 // otherwise return, no need to show frames from this video stream
97 return;
98 }
99 }
100
101 image = event.getImage();
102 gotFirst = true;
103 } catch (Exception e) {
104 this.e = e;
105 }
106 }
107 }