1 /**
2 * Copyright (c) 2011, The University of Southampton and the individual contributors.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * * Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 *
11 * * Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * * Neither the name of the University of Southampton nor the names of its
16 * contributors may be used to endorse or promote products derived from this
17 * software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
26 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30 package org.openimaj.tools.imagecollection.collection.video;
31
32 import java.util.HashMap;
33 import java.util.Iterator;
34
35 import org.openimaj.image.Image;
36 import org.openimaj.tools.imagecollection.collection.ImageCollectionEntry;
37 import org.openimaj.tools.imagecollection.collection.ImageCollectionEntrySelection;
38 import org.openimaj.video.Video;
39
40 public class MetadataVideoIterator<T extends Image<?, T>> implements Iterator<ImageCollectionEntry<T>> {
41
42 private Video<T> video;
43 private ImageCollectionEntrySelection<T> selection;
44 private int frameCount = 0;
45
46 public MetadataVideoIterator(ImageCollectionEntrySelection<T> selection, Video<T> video) {
47 this.video = video;
48 this.selection = selection;
49 }
50
51 @Override
52 public boolean hasNext() {
53 return frameCount >= 0 && video.hasNextFrame();
54 }
55
56 @Override
57 public ImageCollectionEntry<T> next() {
58 final T image = video.getNextFrame();
59 final ImageCollectionEntry<T> entry = new ImageCollectionEntry<T>();
60 entry.meta = new HashMap<String, String>();
61 entry.meta.put("timestamp", "" + this.frameCount / this.video.getFPS());
62 entry.accepted = selection.acceptEntry(image);
63 entry.image = image;
64 this.frameCount++;
65
66 // hack to stop the iterator at the end until hasNext works properly
67 if (image == null)
68 frameCount = -1;
69
70 return entry;
71 }
72
73 @Override
74 public void remove() {
75 // TODO Auto-generated method stub
76
77 }
78
79 }