1/*
2 * Copyright 2012 Sebastian Annies, Hamburg
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 */
16package com.coremedia.iso;
17
18import java.nio.ByteBuffer;
19
20public final class IsoTypeWriter {
21
22    public static void writeUInt64(ByteBuffer bb, long u) {
23        bb.putLong(u);
24    }
25
26    public static void writeUInt32(ByteBuffer bb, long u) {
27        bb.putInt((int) u);
28
29    }
30
31    public static void writeUInt32BE(ByteBuffer bb, long u) {
32        assert u >= 0 && u <= 1L << 32 : "The given long is not in the range of uint32 (" + u + ")";
33        writeUInt16BE(bb, (int) u & 0xFFFF);
34        writeUInt16BE(bb, (int) ((u >> 16) & 0xFFFF));
35
36    }
37
38
39    public static void writeUInt24(ByteBuffer bb, int i) {
40        i = i & 0xFFFFFF;
41        writeUInt16(bb, i >> 8);
42        writeUInt8(bb, i);
43
44    }
45
46
47    public static void writeUInt16(ByteBuffer bb, int i) {
48        i = i & 0xFFFF;
49        writeUInt8(bb, i >> 8);
50        writeUInt8(bb, i & 0xFF);
51    }
52
53    public static void writeUInt16BE(ByteBuffer bb, int i) {
54        i = i & 0xFFFF;
55        writeUInt8(bb, i & 0xFF);
56        writeUInt8(bb, i >> 8);
57    }
58
59    public static void writeUInt8(ByteBuffer bb, int i) {
60        i = i & 0xFF;
61        bb.put((byte) i);
62    }
63
64
65    public static void writeFixedPont1616(ByteBuffer bb, double v) {
66        int result = (int) (v * 65536);
67        bb.put((byte) ((result & 0xFF000000) >> 24));
68        bb.put((byte) ((result & 0x00FF0000) >> 16));
69        bb.put((byte) ((result & 0x0000FF00) >> 8));
70        bb.put((byte) ((result & 0x000000FF)));
71    }
72
73    public static void writeFixedPont88(ByteBuffer bb, double v) {
74        short result = (short) (v * 256);
75        bb.put((byte) ((result & 0xFF00) >> 8));
76        bb.put((byte) ((result & 0x00FF)));
77    }
78
79    public static void writeIso639(ByteBuffer bb, String language) {
80        if (language.getBytes().length != 3) {
81            throw new IllegalArgumentException("\"" + language + "\" language string isn't exactly 3 characters long!");
82        }
83        int bits = 0;
84        for (int i = 0; i < 3; i++) {
85            bits += (language.getBytes()[i] - 0x60) << (2 - i) * 5;
86        }
87        writeUInt16(bb, bits);
88    }
89
90    public static void writeUtf8String(ByteBuffer bb, String string) {
91
92        bb.put(Utf8.convert(string));
93        writeUInt8(bb, 0);
94    }
95}
96