package com.genersoft.iot.vmp.gb28181.transmit.request.impl;
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import javax.sdp.*;
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import javax.sip.InvalidArgumentException;
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import javax.sip.RequestEvent;
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import javax.sip.SipException;
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import javax.sip.SipFactory;
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import javax.sip.address.Address;
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import javax.sip.address.SipURI;
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import javax.sip.header.*;
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import javax.sip.message.Request;
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import javax.sip.message.Response;
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import com.genersoft.iot.vmp.conf.MediaServerConfig;
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import com.genersoft.iot.vmp.gb28181.bean.Device;
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import com.genersoft.iot.vmp.gb28181.bean.DeviceChannel;
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import com.genersoft.iot.vmp.gb28181.bean.SendRtpItem;
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import com.genersoft.iot.vmp.gb28181.transmit.cmd.impl.SIPCommander;
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import com.genersoft.iot.vmp.gb28181.transmit.cmd.impl.SIPCommanderFroPlatform;
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import com.genersoft.iot.vmp.gb28181.transmit.request.SIPRequestAbstractProcessor;
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import com.genersoft.iot.vmp.media.zlm.ZLMRTPServerFactory;
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import com.genersoft.iot.vmp.storager.IRedisCatchStorage;
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import com.genersoft.iot.vmp.storager.IVideoManagerStorager;
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import com.genersoft.iot.vmp.vmanager.play.bean.PlayResult;
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import com.genersoft.iot.vmp.vmanager.service.IPlayService;
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import gov.nist.javax.sip.address.AddressImpl;
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import gov.nist.javax.sip.address.SipUri;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.text.ParseException;
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import java.util.Vector;
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/**
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* @Description:处理INVITE请求
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* @author: panll
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* @date: 2021年1月14日
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*/
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@SuppressWarnings("rawtypes")
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public class InviteRequestProcessor extends SIPRequestAbstractProcessor {
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private final static Logger logger = LoggerFactory.getLogger(MessageRequestProcessor.class);
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private SIPCommanderFroPlatform cmderFroPlatform;
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private IVideoManagerStorager storager;
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private IRedisCatchStorage redisCatchStorage;
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private SIPCommander cmder;
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private IPlayService playService;
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private ZLMRTPServerFactory zlmrtpServerFactory;
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public ZLMRTPServerFactory getZlmrtpServerFactory() {
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return zlmrtpServerFactory;
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}
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public void setZlmrtpServerFactory(ZLMRTPServerFactory zlmrtpServerFactory) {
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this.zlmrtpServerFactory = zlmrtpServerFactory;
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}
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/**
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* 处理invite请求
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*
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* @param evt
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* 请求消息
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*/
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@Override
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public void process(RequestEvent evt) {
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// Invite Request消息实现，此消息一般为级联消息，上级给下级发送请求视频指令
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try {
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Request request = evt.getRequest();
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SipURI sipURI = (SipURI) request.getRequestURI();
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String channelId = sipURI.getUser();
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String platformId = null;
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FromHeader fromHeader = (FromHeader)request.getHeader(FromHeader.NAME);
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AddressImpl address = (AddressImpl) fromHeader.getAddress();
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SipUri uri = (SipUri) address.getURI();
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platformId = uri.getUser();
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if (platformId == null || channelId == null) {
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logger.info("无法从FromHeader的Address中获取到平台id，返回404");
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responseAck(evt, Response.BAD_REQUEST); // 参数不全， 发400，请求错误
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return;
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}
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// 查询平台下是否有该通道
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DeviceChannel channel = storager.queryChannelInParentPlatform(platformId, channelId);
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if (channel == null) {
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logger.info("通道不存在，返回404");
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responseAck(evt, Response.NOT_FOUND); // 通道不存在，发404，资源不存在
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return;
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}else {
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responseAck(evt, Response.TRYING); // 通道存在，发100，trying
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}
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// 解析sdp消息, 使用jainsip 自带的sdp解析方式
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String contentString = new String(request.getRawContent());
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// jainSip不支持y=字段， 移除移除以解析。
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int ssrcIndex = contentString.indexOf("y=");
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String ssrc = contentString.substring(ssrcIndex + 2, ssrcIndex + 12);
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//ssrc规定长度为10字节，不取余下长度以避免后续还有“f=”字段
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// String ssrc = contentString.substring(ssrcIndex + 2, contentString.length())
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// .replace("\r\n", "").replace("\n", "");
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String substring = contentString.substring(0, contentString.indexOf("y="));
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SessionDescription sdp = SdpFactory.getInstance().createSessionDescription(substring);
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// 获取支持的格式
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Vector mediaDescriptions = sdp.getMediaDescriptions(true);
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// 查看是否支持PS 负载96
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//String ip = null;
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int port = -1;
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//boolean recvonly = false;
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boolean mediaTransmissionTCP = false;
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Boolean tcpActive = null;
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for (int i = 0; i < mediaDescriptions.size(); i++) {
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MediaDescription mediaDescription = (MediaDescription)mediaDescriptions.get(i);
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Media media = mediaDescription.getMedia();
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Vector mediaFormats = media.getMediaFormats(false);
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if (mediaFormats.contains("96")) {
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port = media.getMediaPort();
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//String mediaType = media.getMediaType();
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String protocol = media.getProtocol();
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// 区分TCP发流还是udp， 当前默认udp
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if ("TCP/RTP/AVP".equals(protocol)) {
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String setup = mediaDescription.getAttribute("setup");
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if (setup != null) {
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mediaTransmissionTCP = true;
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if ("active".equals(setup)) {
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tcpActive = true;
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}else if ("passive".equals(setup)) {
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tcpActive = false;
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}
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}
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}
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break;
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}
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}
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if (port == -1) {
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logger.info("不支持的媒体格式，返回415");
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// 回复不支持的格式
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responseAck(evt, Response.UNSUPPORTED_MEDIA_TYPE); // 不支持的格式，发415
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return;
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}
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String username = sdp.getOrigin().getUsername();
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String addressStr = sdp.getOrigin().getAddress();
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//String sessionName = sdp.getSessionName().getValue();
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logger.info("[上级点播]用户：{}， 地址：{}:{}， ssrc：{}", username, addressStr, port, ssrc);
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Device device = storager.queryVideoDeviceByPlatformIdAndChannelId(platformId, channelId);
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if (device == null) {
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logger.warn("点播平台{}的通道{}时未找到设备信息", platformId, channel);
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responseAck(evt, Response.SERVER_INTERNAL_ERROR);
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return;
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}
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SendRtpItem sendRtpItem = zlmrtpServerFactory.createSendRtpItem(addressStr, port, ssrc, platformId, device.getDeviceId(), channelId,
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mediaTransmissionTCP);
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if (tcpActive != null) {
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sendRtpItem.setTcpActive(tcpActive);
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}
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if (sendRtpItem == null) {
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logger.warn("服务器端口资源不足");
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responseAck(evt, Response.BUSY_HERE);
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return;
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}
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// 写入redis， 超时时回复
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redisCatchStorage.updateSendRTPSever(sendRtpItem);
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// 通知下级推流，
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PlayResult playResult = playService.play(device.getDeviceId(), channelId, (responseJSON)->{
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// 收到推流， 回复200OK, 等待ack
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sendRtpItem.setStatus(1);
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redisCatchStorage.updateSendRTPSever(sendRtpItem);
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// TODO 添加对tcp的支持
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MediaServerConfig mediaInfo = redisCatchStorage.getMediaInfo();
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StringBuffer content = new StringBuffer(200);
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content.append("v=0\r\n");
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content.append("o="+"00000"+" 0 0 IN IP4 "+mediaInfo.getWanIp()+"\r\n");
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content.append("s=Play\r\n");
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content.append("c=IN IP4 "+mediaInfo.getWanIp()+"\r\n");
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content.append("t=0 0\r\n");
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content.append("m=video "+ sendRtpItem.getLocalPort()+" RTP/AVP 96\r\n");
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content.append("a=sendonly\r\n");
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content.append("a=rtpmap:96 PS/90000\r\n");
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content.append("y="+ ssrc + "\r\n");
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content.append("f=\r\n");
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try {
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responseAck(evt, content.toString());
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} catch (SipException e) {
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e.printStackTrace();
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} catch (InvalidArgumentException e) {
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e.printStackTrace();
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} catch (ParseException e) {
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e.printStackTrace();
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}
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},(event -> {
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// 未知错误。直接转发设备点播的错误
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Response response = null;
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try {
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response = getMessageFactory().createResponse(event.getResponse().getStatusCode(), evt.getRequest());
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getServerTransaction(evt).sendResponse(response);
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} catch (ParseException | SipException | InvalidArgumentException e) {
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e.printStackTrace();
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}
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}));
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if (logger.isDebugEnabled()) {
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logger.debug(playResult.getResult().toString());
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}
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} catch (SipException | InvalidArgumentException | ParseException e) {
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e.printStackTrace();
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logger.warn("sdp解析错误");
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e.printStackTrace();
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} catch (SdpParseException e) {
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e.printStackTrace();
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} catch (SdpException e) {
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e.printStackTrace();
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}
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}
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/***
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* 回复状态码
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* 100 trying
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* 200 OK
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* 400
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* 404
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* @param evt
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* @throws SipException
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* @throws InvalidArgumentException
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* @throws ParseException
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*/
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private void responseAck(RequestEvent evt, int statusCode) throws SipException, InvalidArgumentException, ParseException {
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Response response = getMessageFactory().createResponse(statusCode, evt.getRequest());
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getServerTransaction(evt).sendResponse(response);
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}
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/**
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* 回复带sdp的200
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* @param evt
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* @param sdp
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* @throws SipException
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* @throws InvalidArgumentException
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* @throws ParseException
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*/
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private void responseAck(RequestEvent evt, String sdp) throws SipException, InvalidArgumentException, ParseException {
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Response response = getMessageFactory().createResponse(Response.OK, evt.getRequest());
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SipFactory sipFactory = SipFactory.getInstance();
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ContentTypeHeader contentTypeHeader = sipFactory.createHeaderFactory().createContentTypeHeader("APPLICATION", "SDP");
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response.setContent(sdp, contentTypeHeader);
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SipURI sipURI = (SipURI)evt.getRequest().getRequestURI();
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Address concatAddress = sipFactory.createAddressFactory().createAddress(
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sipFactory.createAddressFactory().createSipURI(sipURI.getUser(), sipURI.getHost()+":"+sipURI.getPort()
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));
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response.addHeader(sipFactory.createHeaderFactory().createContactHeader(concatAddress));
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getServerTransaction(evt).sendResponse(response);
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}
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public SIPCommanderFroPlatform getCmderFroPlatform() {
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return cmderFroPlatform;
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}
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public void setCmderFroPlatform(SIPCommanderFroPlatform cmderFroPlatform) {
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this.cmderFroPlatform = cmderFroPlatform;
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}
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public IVideoManagerStorager getStorager() {
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return storager;
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}
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public void setStorager(IVideoManagerStorager storager) {
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this.storager = storager;
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}
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public SIPCommander getCmder() {
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return cmder;
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}
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public void setCmder(SIPCommander cmder) {
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this.cmder = cmder;
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}
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public IPlayService getPlayService() {
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return playService;
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}
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public void setPlayService(IPlayService playService) {
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this.playService = playService;
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}
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public IRedisCatchStorage getRedisCatchStorage() {
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return redisCatchStorage;
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}
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public void setRedisCatchStorage(IRedisCatchStorage redisCatchStorage) {
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this.redisCatchStorage = redisCatchStorage;
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}
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}
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