1/*
2 * Copyright (C) 2006 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.internal.telephony.cat;
18
19/**
20 * {@hide}
21 */
22public class ImageDescriptor {
23    // members
24    int width;
25    int height;
26    int codingScheme;
27    int imageId;
28    int highOffset;
29    int lowOffset;
30    int length;
31
32    // constants
33    static final int CODING_SCHEME_BASIC = 0x11;
34    static final int CODING_SCHEME_COLOUR = 0x21;
35
36    // public static final int ID_LENGTH = 9;
37    // ID_LENGTH substituted by IccFileHandlerBase.GET_RESPONSE_EF_IMG_SIZE_BYTES
38
39    ImageDescriptor() {
40        width = 0;
41        height = 0;
42        codingScheme = 0;
43        imageId = 0;
44        highOffset = 0;
45        lowOffset = 0;
46        length = 0;
47    }
48
49    /**
50     * Extract descriptor information about image instance.
51     *
52     * @param rawData
53     * @param valueIndex
54     * @return ImageDescriptor
55     */
56    static ImageDescriptor parse(byte[] rawData, int valueIndex) {
57        ImageDescriptor d = new ImageDescriptor();
58        try {
59            d.width = rawData[valueIndex++] & 0xff;
60            d.height = rawData[valueIndex++] & 0xff;
61            d.codingScheme = rawData[valueIndex++] & 0xff;
62
63            // parse image id
64            d.imageId = (rawData[valueIndex++] & 0xff) << 8;
65            d.imageId |= rawData[valueIndex++] & 0xff;
66            // parse offset
67            d.highOffset = (rawData[valueIndex++] & 0xff); // high byte offset
68            d.lowOffset = rawData[valueIndex++] & 0xff; // low byte offset
69
70            d.length = ((rawData[valueIndex++] & 0xff) << 8 | (rawData[valueIndex++] & 0xff));
71        } catch (IndexOutOfBoundsException e) {
72            CatLog.d("ImageDescripter", "parse; failed parsing image descriptor");
73            d = null;
74        }
75        return d;
76    }
77}
78