com.github.xingshuangs.iot.protocol.rtp.model.RtpPackage 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.rtp.model;
import com.github.xingshuangs.iot.common.IObjectByteArray;
import com.github.xingshuangs.iot.common.buff.ByteReadBuff;
import com.github.xingshuangs.iot.common.buff.ByteWriteBuff;
import lombok.Data;
/**
* Rtp package class.
* (RTP数据包)
*
* @author xingshuang
*/
@Data
public class RtpPackage implements IObjectByteArray {
/**
* Header.
* (头)
*/
private RtpHeader header;
/**
* Payload.
* (负载)
*/
private byte[] payload;
/**
* Ignore length.
* (需要忽略的长度)
*/
private int ignoreLength;
@Override
public int byteArrayLength() {
return this.header.byteArrayLength() + this.payload.length + ignoreLength;
}
@Override
public byte[] toByteArray() {
return ByteWriteBuff.newInstance(this.byteArrayLength())
.putBytes(this.header.toByteArray())
.putBytes(this.payload)
.getData();
}
/**
* Parses byte array and converts it to object.
*
* @param data byte array
* @return RtcpHeader
*/
public static RtpPackage fromBytes(final byte[] data) {
return fromBytes(data, 0);
}
/**
* Parses byte array and converts it to object.
*
* @param data byte array
* @param offset index offset
* @return RtcpHeader
*/
public static RtpPackage fromBytes(final byte[] data, final int offset) {
if (data.length < 12) {
throw new IndexOutOfBoundsException("RtpPackage, data length < 12");
}
int index = offset;
RtpPackage res = new RtpPackage();
// 头
res.header = RtpHeader.fromBytes(data, offset);
index += res.header.byteArrayLength();
// 最后一个填充字节标识了总共需要忽略多少个填充字节（包括自己）
res.ignoreLength = res.header.isPadding() ? data[data.length - 1] & 0xFF : 0;
// 负载
ByteReadBuff buff = new ByteReadBuff(data, index);
int payloadLength = data.length - index - res.ignoreLength;
res.payload = buff.getBytes(payloadLength);
return res;
}
}