1/*
2 * Copyright 2008 CoreMedia AG, 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 */
16
17package com.coremedia.iso.boxes;
18
19import com.coremedia.iso.IsoTypeReader;
20import com.coremedia.iso.IsoTypeWriter;
21
22import java.nio.ByteBuffer;
23
24import static com.googlecode.mp4parser.util.CastUtils.l2i;
25
26/**
27 * The chunk offset table gives the index of each chunk into the containing file. Defined in ISO/IEC 14496-12.
28 */
29public class StaticChunkOffsetBox extends ChunkOffsetBox {
30    public static final String TYPE = "stco";
31
32    private long[] chunkOffsets = new long[0];
33
34    public StaticChunkOffsetBox() {
35        super(TYPE);
36    }
37
38    public long[] getChunkOffsets() {
39        return chunkOffsets;
40    }
41
42    protected long getContentSize() {
43        return 8 + chunkOffsets.length * 4;
44    }
45
46    public void setChunkOffsets(long[] chunkOffsets) {
47        this.chunkOffsets = chunkOffsets;
48    }
49
50    @Override
51    public void _parseDetails(ByteBuffer content) {
52        parseVersionAndFlags(content);
53        int entryCount = l2i(IsoTypeReader.readUInt32(content));
54        chunkOffsets = new long[entryCount];
55        for (int i = 0; i < entryCount; i++) {
56            chunkOffsets[i] = IsoTypeReader.readUInt32(content);
57        }
58
59    }
60
61    @Override
62    protected void getContent(ByteBuffer byteBuffer) {
63        writeVersionAndFlags(byteBuffer);
64        IsoTypeWriter.writeUInt32(byteBuffer, chunkOffsets.length);
65        for (long chunkOffset : chunkOffsets) {
66            IsoTypeWriter.writeUInt32(byteBuffer, chunkOffset);
67        }
68    }
69
70
71}
72