com.github.xingshuangs.iot.protocol.rtcp.model.RtcpSdesReport 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.rtcp.model;
import com.github.xingshuangs.iot.common.buff.ByteWriteBuff;
import com.github.xingshuangs.iot.protocol.rtcp.enums.ERtcpPackageType;
import lombok.Data;
import lombok.EqualsAndHashCode;
import java.util.ArrayList;
import java.util.List;
/**
* 资源描述报告
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* |V=2|P| SC | PT=SDES=202 | length |
* +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
* | SSRC/CSRC_1 |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | SDES items |
* | ... |
* +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
* | SSRC/CSRC_2 |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | SDES items |
* | ... |
* +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | CNAME=1 | length | user and domain name ...
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* @author xingshuang
*/
@Data
@EqualsAndHashCode(callSuper = true)
public final class RtcpSdesReport extends RtcpBasePackage {
private List sdesChunks = new ArrayList<>();
public RtcpSdesReport() {
this.header = new RtcpHeader();
this.header.version = 2;
this.header.padding = false;
this.header.receptionCount = 0;
this.header.packageType = ERtcpPackageType.SDES;
this.header.length = 1;
}
public void addRtcpSdesChunk(RtcpSdesChunk chunk) {
this.sdesChunks.add(chunk);
this.header.receptionCount = this.sdesChunks.size();
this.header.length = this.byteArrayLength() / 4 - 1;
}
@Override
public int byteArrayLength() {
int length = 0;
length += this.header != null ? this.header.byteArrayLength() : 0;
for (RtcpSdesChunk chunk : this.sdesChunks) {
length += chunk.byteArrayLength();
}
return (int) Math.ceil(length / 4.0) * 4;
}
@Override
public byte[] toByteArray() {
ByteWriteBuff buff = ByteWriteBuff.newInstance(this.byteArrayLength());
if (this.header != null) {
buff.putBytes(this.header.toByteArray());
}
for (RtcpSdesChunk chunk : this.sdesChunks) {
buff.putBytes(chunk.toByteArray());
}
return buff.getData();
}
/**
* Parses byte array and converts it to object.
*
* @param data byte array
* @return RtcpHeader
*/
public static RtcpSdesReport 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 RtcpSdesReport fromBytes(final byte[] data, final int offset) {
if (data.length < 4) {
throw new IndexOutOfBoundsException("RtcpReceiverReport, data length < 4");
}
int off = offset;
RtcpSdesReport res = new RtcpSdesReport();
res.header = RtcpHeader.fromBytes(data, off);
off += res.header.byteArrayLength();
for (int i = 0; i < res.header.getReceptionCount(); i++) {
RtcpSdesChunk chunk = RtcpSdesChunk.fromBytes(data, off);
res.sdesChunks.add(chunk);
off += chunk.byteArrayLength();
}
return res;
}
}