com.github.xingshuangs.iot.protocol.mp4.model.Mp4MfhdBox Maven / Gradle / Ivy
/*
* MIT License
*
* Copyright (c) 2021-2099 Oscura (xingshuang)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.github.xingshuangs.iot.protocol.mp4.model;
import com.github.xingshuangs.iot.common.buff.ByteWriteBuff;
import com.github.xingshuangs.iot.protocol.mp4.enums.EMp4Type;
/**
* The Movie Fragment header Box(mfhd), which contains fragment sequence information, identifies the fragment sequence for each track.
* Movie Fragment header Box(mfhd),包含分片序列信息，标识每个track的分片序列
*
* @author xingshuang
*/
public class Mp4MfhdBox extends Mp4Box {
/**
* 1-bytes, version
*/
private final int version;
/**
* 3-bytes flags
*/
private final byte[] flags;
/**
* 4-bytes media stream serial number: a serial number for each trunk.
* The serial number increases from 1, that is, the serial number of each moof, which is 1 more than the previous one.
* 媒体流序列号，每个trunk一个序列号，序列号从1开始递增，就是每个moof的序列号，相比前一个要加1
*/
private final long sequenceNumber;
public Mp4MfhdBox(long sequenceNumber) {
this.mp4Type = EMp4Type.MFHD;
this.version = 0;
this.flags = new byte[3];
this.sequenceNumber = sequenceNumber;
}
@Override
public int byteArrayLength() {
return 16;
}
@Override
public byte[] toByteArray() {
int size = this.byteArrayLength();
return ByteWriteBuff.newInstance(size)
.putInteger(size)
.putBytes(this.mp4Type.getByteArray())
.putByte(this.version)
.putBytes(this.flags)
.putInteger(this.sequenceNumber)
.getData();
}
}