blob: 78f9173ccb63c660cb6bc60f318c721e5e00d466 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.gallery3d.exif;
import java.util.HashMap;
import java.util.Map;
/**
* This class stores all the tags in an IFD.
*
* @see ExifData
* @see ExifTag
*/
class IfdData {
private final int mIfdId;
private final Map<Short, ExifTag> mExifTags = new HashMap<Short, ExifTag>();
private int mOffsetToNextIfd = 0;
/**
* Creates an IfdData with given IFD ID.
*
* @see IfdId#TYPE_IFD_0
* @see IfdId#TYPE_IFD_1
* @see IfdId#TYPE_IFD_EXIF
* @see IfdId#TYPE_IFD_GPS
* @see IfdId#TYPE_IFD_INTEROPERABILITY
*/
public IfdData(int ifdId) {
mIfdId = ifdId;
}
/**
* Get a array the contains all {@link ExifTag} in this IFD.
*/
public ExifTag[] getAllTags() {
return mExifTags.values().toArray(new ExifTag[mExifTags.size()]);
}
/**
* Gets the ID of this IFD.
*
* @see IfdId#TYPE_IFD_0
* @see IfdId#TYPE_IFD_1
* @see IfdId#TYPE_IFD_EXIF
* @see IfdId#TYPE_IFD_GPS
* @see IfdId#TYPE_IFD_INTEROPERABILITY
*/
public int getId() {
return mIfdId;
}
/**
* Gets the {@link ExifTag} with given tag id. Return null if there is no such tag.
*/
public ExifTag getTag(short tagId) {
return mExifTags.get(tagId);
}
/**
* Adds or replaces a {@link ExifTag}.
*/
public void setTag(ExifTag tag) {
mExifTags.put(tag.getTagId(), tag);
}
/**
* Gets the tags count in the IFD.
*/
public int getTagCount() {
return mExifTags.size();
}
/**
* Sets the offset of next IFD.
*/
void setOffsetToNextIfd(int offset) {
mOffsetToNextIfd = offset;
}
/**
* Gets the offset of next IFD.
*/
int getOffsetToNextIfd() {
return mOffsetToNextIfd;
}
/**
* Returns true if all tags in this two IFDs are equal. Note that tags of IFDs offset or
* thumbnail offset will be ignored.
*/
@Override
public boolean equals(Object obj) {
if (obj instanceof IfdData) {
IfdData data = (IfdData) obj;
if (data.getId() == mIfdId && data.getTagCount() == getTagCount()) {
ExifTag[] tags = data.getAllTags();
for (ExifTag tag: tags) {
if (ExifTag.isOffsetTag(tag.getTagId())) continue;
ExifTag tag2 = mExifTags.get(tag.getTagId());
if (!tag.equals(tag2)) return false;
}
return true;
}
}
return false;
}
}
|