重构SSRC管理逻辑

src/main/java/com/genersoft/iot/vmp/gb28181/bean/InviteMessageInfo.java

@@ -10,8 +10,6 @@ public class InviteMessageInfo {
     private String sourceChannelId;
     private String sessionName;
     private String ssrc;
-    private String allocatedSsrc;
-    private String allocatedSsrcMediaServerId;
     private boolean tcp;
     private boolean tcpActive;
     private String callId;

src/main/java/com/genersoft/iot/vmp/gb28181/bean/SendRtpInfo.java

@@ -24,11 +24,6 @@ public class SendRtpInfo {
      */
     private String ssrc;
 
-    /**
-     * 从SSRC池中分配的SSRC
-     */
-    private String allocatedSsrc;
-
     /**
      * 目标平台或设备的编号
      */
@@ -253,7 +248,5 @@ public class SendRtpInfo {
         }
     }
 
-    public String getSsrcToRelease() {
+
-        return allocatedSsrc;
-    }
 }

src/main/java/com/genersoft/iot/vmp/gb28181/bean/SsrcTransaction.java

@@ -47,11 +47,6 @@ public class SsrcTransaction {
      */
     private String ssrc;
 
-    /**
-     * 从SSRC池中分配的SSRC
-     */
-    private String allocatedSsrc;
-
     /**
      * 事务信息
      */
@@ -94,7 +89,5 @@ public class SsrcTransaction {
     public SsrcTransaction() {
     }
 
-    public String getSsrcToRelease() {
+
-        return allocatedSsrc;
-    }
 }

src/main/java/com/genersoft/iot/vmp/gb28181/service/impl/DeviceServiceImpl.java

@@ -266,7 +266,6 @@ public class DeviceServiceImpl implements IDeviceService {
         List<SsrcTransaction> ssrcTransactions = sessionManager.getSsrcTransactionByDeviceId(device.getDeviceId());
         if (ssrcTransactions != null && !ssrcTransactions.isEmpty()) {
             for (SsrcTransaction ssrcTransaction : ssrcTransactions) {
-                mediaServerService.releaseSsrc(ssrcTransaction.getMediaServerId(), ssrcTransaction.getSsrcToRelease());
                 receiveRtpServerService.closeRTPServerByMediaServerId(ssrcTransaction.getMediaServerId(), ssrcTransaction.getApp(), ssrcTransaction.getStream());
                 sessionManager.removeByCallId(ssrcTransaction.getCallId());
             }

src/main/java/com/genersoft/iot/vmp/gb28181/service/impl/PlatformServiceImpl.java

@@ -128,7 +128,6 @@ public class PlatformServiceImpl implements IPlatformService {
                 }
                 sendRtpServerService.delete(sendRtpItem);
                 if (mediaServerItem != null) {
-                    ssrcFactory.releaseSsrc(sendRtpItem.getMediaServerId(), sendRtpItem.getSsrcToRelease());
                     boolean stopResult = mediaServerService.initStopSendRtp(mediaServerItem, sendRtpItem.getApp(), sendRtpItem.getStream(), sendRtpItem.getSsrc());
                     if (stopResult) {
                         Platform platform = queryPlatformByServerGBId(sendRtpItem.getTargetId());
@@ -335,7 +334,6 @@ public class PlatformServiceImpl implements IPlatformService {
                 if (sendRtpItem != null && sendRtpItem.getApp().equals(event.getApp()) && sendRtpItem.isSendToPlatform()) {
                     Platform platform = platformMapper.getParentPlatByServerGBId(sendRtpItem.getTargetId());
                     CommonGBChannel channel = channelService.getOne(sendRtpItem.getChannelId());
-                    ssrcFactory.releaseSsrc(sendRtpItem.getMediaServerId(), sendRtpItem.getSsrcToRelease());
                     try {
                         commanderForPlatform.streamByeCmd(platform, sendRtpItem, channel);
                     } catch (SipException | InvalidArgumentException | ParseException e) {
@@ -522,7 +520,6 @@ public class PlatformServiceImpl implements IPlatformService {
         List<SendRtpInfo> sendRtpItems = sendRtpServerService.queryForPlatform(platformId);
         if (sendRtpItems != null && !sendRtpItems.isEmpty()) {
             for (SendRtpInfo sendRtpItem : sendRtpItems) {
-                ssrcFactory.releaseSsrc(sendRtpItem.getMediaServerId(), sendRtpItem.getSsrcToRelease());
                 sendRtpServerService.delete(sendRtpItem);
                 MediaServer mediaInfo = mediaServerService.getOne(sendRtpItem.getMediaServerId());
                 mediaServerService.stopSendRtp(mediaInfo, sendRtpItem.getApp(), sendRtpItem.getStream(), null);
@@ -626,7 +623,6 @@ public class PlatformServiceImpl implements IPlatformService {
                                 log.error("[点播超时]， 发送BYE失败 {}", e.getMessage());
                             } finally {
                                 timeoutCallback.run(1, "收流超时");
-                                mediaServerService.releaseSsrc(mediaServerItem.getId(), data.getSsrcInfo().getSsrcToRelease());
                                 receiveRtpServerService.closeRTPServer(mediaServerItem, data.getSsrcInfo().getApp(), data.getSsrcInfo().getStream());
                                 sessionManager.removeByStream(data.getSsrcInfo().getApp(), data.getSsrcInfo().getStream());
                             }
@@ -702,7 +698,6 @@ public class PlatformServiceImpl implements IPlatformService {
                     // ssrc检验
                     // 更新ssrc
                     log.info("[Invite 200OK] SSRC修正 {}->{}", ssrcInfo.getSsrc(), ssrcInResponse);
-                    releaseAllocatedSsrc(mediaServerItem, ssrcInfo);
                     Boolean result = mediaServerService.updateRtpServerSSRC(mediaServerItem, ssrcInfo.getApp(), ssrcInfo.getStream(), ssrcInResponse);
                     if (!result) {
                         try {
@@ -711,8 +706,6 @@ public class PlatformServiceImpl implements IPlatformService {
                         } catch (InvalidArgumentException | SipException | ParseException | SsrcTransactionNotFoundException e) {
                             log.error("[命令发送失败] 停止播放， 发送BYE: {}", e.getMessage());
                         } finally {
-                            // 释放ssrc
-                            mediaServerService.releaseSsrc(mediaServerItem.getId(), ssrcInfo.getSsrcToRelease());
                             receiveRtpServerService.closeRTPServer(mediaServerItem, ssrcInfo.getApp(), ssrcInfo.getStream());
                             sessionManager.removeByStream(ssrcInfo.getApp(), ssrcInfo.getStream());
 
@@ -724,7 +717,6 @@ public class PlatformServiceImpl implements IPlatformService {
                         }
                     }else {
                         ssrcInfo.setSsrc(ssrcInResponse);
-                        updateSsrcTransaction(ssrcInfo.getApp(), ssrcInfo.getStream(), ssrcInResponse, null);
                         inviteInfo.setSsrcInfo(ssrcInfo);
                         inviteInfo.setStream(ssrcInfo.getStream());
                         if (userSetting.getBroadcastForPlatform().equalsIgnoreCase("TCP-ACTIVE")) {
@@ -738,9 +730,7 @@ public class PlatformServiceImpl implements IPlatformService {
                         inviteStreamService.updateInviteInfo(inviteInfo);
                     }
                 }else {
-                    releaseAllocatedSsrc(mediaServerItem, ssrcInfo);
                     ssrcInfo.setSsrc(ssrcInResponse);
-                    updateSsrcTransaction(ssrcInfo.getApp(), ssrcInfo.getStream(), ssrcInResponse, null);
                     inviteInfo.setSsrcInfo(ssrcInfo);
                     inviteInfo.setStream(ssrcInfo.getStream());
                     if (userSetting.getBroadcastForPlatform().equalsIgnoreCase("TCP-ACTIVE")) {
@@ -761,7 +751,6 @@ public class PlatformServiceImpl implements IPlatformService {
                     if (ssrcTransaction == null) {
                         return;
                     }
-                    releaseAllocatedSsrc(mediaServerItem, ssrcInfo);
                     sessionManager.removeByStream(ssrcInfo.getApp(), inviteInfo.getStream());
                     inviteStreamService.updateInviteInfoForSSRC(inviteInfo, ssrcInResponse);
 
@@ -770,7 +759,6 @@ public class PlatformServiceImpl implements IPlatformService {
                     ssrcTransaction.setApp(ssrcInfo.getApp());
                     ssrcTransaction.setStream(inviteInfo.getStream());
                     ssrcTransaction.setSsrc(ssrcInResponse);
-                    ssrcTransaction.setAllocatedSsrc(null);
                     ssrcTransaction.setMediaServerId(mediaServerItem.getId());
                     ssrcTransaction.setSipTransactionInfo(new SipTransactionInfo((SIPResponse) responseEvent.getResponse()));
                     ssrcTransaction.setType(inviteSessionType);
@@ -781,25 +769,6 @@ public class PlatformServiceImpl implements IPlatformService {
         }
     }
 
-    private void releaseAllocatedSsrc(MediaServer mediaServerItem, SSRCInfo ssrcInfo) {
-        if (ssrcInfo == null || ssrcInfo.getAllocatedSsrc() == null) {
-            return;
-        }
-        mediaServerService.releaseSsrc(mediaServerItem.getId(), ssrcInfo.getAllocatedSsrc());
-        ssrcInfo.setAllocatedSsrc(null);
-    }
-
-    private void updateSsrcTransaction(String app, String stream, String ssrc, String allocatedSsrc) {
-        SsrcTransaction ssrcTransaction = sessionManager.getSsrcTransactionByStream(app, stream);
-        if (ssrcTransaction == null) {
-            return;
-        }
-        ssrcTransaction.setSsrc(ssrc);
-        ssrcTransaction.setAllocatedSsrc(allocatedSsrc);
-        sessionManager.put(ssrcTransaction);
-    }
-
-
     private void tcpActiveHandler(Platform platform, CommonGBChannel channel, String contentString,
                                   MediaServer mediaServerItem, boolean ssrcCheck,
                                   SSRCInfo ssrcInfo, ErrorCallback<Object> callback){
@@ -830,8 +799,6 @@ public class PlatformServiceImpl implements IPlatformService {
         } catch (SdpException e) {
             log.error("[TCP主动连接对方] serverGbId: {}, channelId: {}, 解析200OK的SDP信息失败", platform.getServerGBId(), channel.getGbDeviceId(), e);
             receiveRtpServerService.closeRTPServer(mediaServerItem, ssrcInfo.getApp(), ssrcInfo.getStream());
-            // 释放ssrc
-            mediaServerService.releaseSsrc(mediaServerItem.getId(), ssrcInfo.getSsrcToRelease());
             sessionManager.removeByStream(ssrcInfo.getApp(), ssrcInfo.getStream());
 
             callback.run(InviteErrorCode.ERROR_FOR_SDP_PARSING_EXCEPTIONS.getCode(),
@@ -855,8 +822,6 @@ public class PlatformServiceImpl implements IPlatformService {
             receiveRtpServerService.closeRTPServer(mediaServerItem, app, stream);
             InviteInfo inviteInfo = inviteStreamService.getInviteInfo(null, channel.getGbId(), stream);
             if (inviteInfo != null) {
-                // 释放ssrc
-                mediaServerService.releaseSsrc(mediaServerItem.getId(), inviteInfo.getSsrcInfo().getSsrcToRelease());
                 inviteStreamService.removeInviteInfo(inviteInfo);
             }
             sessionManager.removeByStream(app, stream);

src/main/java/com/genersoft/iot/vmp/gb28181/service/impl/PlayServiceImpl.java

@@ -13,6 +13,7 @@ import com.genersoft.iot.vmp.gb28181.event.SipSubscribe;
 import com.genersoft.iot.vmp.gb28181.service.*;
 import com.genersoft.iot.vmp.gb28181.session.AudioBroadcastManager;
 import com.genersoft.iot.vmp.gb28181.session.SSRCFactory;
+import com.genersoft.iot.vmp.gb28181.session.SendSsrcFactory;
 import com.genersoft.iot.vmp.gb28181.session.SipInviteSessionManager;
 import com.genersoft.iot.vmp.gb28181.transmit.cmd.ISIPCommander;
 import com.genersoft.iot.vmp.gb28181.transmit.cmd.ISIPCommanderForPlatform;
@@ -109,6 +110,9 @@ public class PlayServiceImpl implements IPlayService {
     @Autowired
     private SSRCFactory ssrcFactory;
 
+    @Autowired
+    private SendSsrcFactory sendSsrcFactory;
+
     @Autowired
     private IPlatformService platformService;
 
@@ -335,9 +339,6 @@ public class PlayServiceImpl implements IPlayService {
         InviteInfo inviteInfoInCatch = inviteStreamService.getInviteInfoByDeviceAndChannel(InviteSessionType.PLAY, channel.getId());
         if (inviteInfoInCatch != null ) {
             if (inviteInfoInCatch.getStreamInfo() == null) {
-                // 释放生成的ssrc，使用上一次申请的
-
-                ssrcFactory.releaseSsrc(mediaServer.getId(), ssrc);
                 // 点播发起了但是尚未成功, 仅注册回调等待结果即可
                 inviteStreamService.once(InviteSessionType.PLAY, channel.getId(), null, callback);
                 log.info("[点播开始] 已经请求中，等待结果， deviceId: {}, channelId({}): {}", device.getDeviceId(), channel.getDeviceId(), channel.getId());
@@ -480,25 +481,23 @@ public class PlayServiceImpl implements IPlayService {
     private void talk(MediaServer mediaServerItem, Device device, DeviceChannel channel, String stream,
                       SipSubscribe.Event errorEvent, Runnable timeoutCallback, AudioBroadcastEvent audioEvent) {
 
-        String playSsrc = ssrcFactory.getPlaySsrc(mediaServerItem.getId());
+        String ySsrc = ssrcFactory.getPlaySsrc(mediaServerItem.getId());
 
-        if (playSsrc == null) {
+        if (ySsrc == null) {
             audioEvent.call("ssrc已经用尽");
             return;
         }
+        String sendSsrc = sendSsrcFactory.getSendSsrc("0");
         SendRtpInfo sendRtpInfo;
         try {
-            sendRtpInfo = sendRtpServerService.createSendRtpInfo(mediaServerItem, null, null, playSsrc, device.getDeviceId(), MediaStreamUtil.GB28181_TALK, stream,
+            sendRtpInfo = sendRtpServerService.createSendRtpInfo(mediaServerItem, null, null, sendSsrc, device.getDeviceId(), MediaStreamUtil.GB28181_TALK, stream,
                     channel.getId(), true, false);
             if (sendRtpInfo == null) {
-                ssrcFactory.releaseSsrc(mediaServerItem.getId(), playSsrc);
                 audioEvent.call("获取发流端口失败");
                 return;
             }
-            sendRtpInfo.setAllocatedSsrc(playSsrc);
             sendRtpInfo.setPlayType(InviteStreamType.TALK);
         }catch (PlayException e) {
-            ssrcFactory.releaseSsrc(mediaServerItem.getId(), playSsrc);
             log.info("[语音对讲]开始 获取发流端口失败 deviceId: {}, channelId: {},", device.getDeviceId(), channel.getDeviceId());
             return;
         }
@@ -525,7 +524,6 @@ public class PlayServiceImpl implements IPlayService {
                 log.error("[语音对讲]超时， 发送BYE失败 {}", e.getMessage());
             } finally {
                 timeoutCallback.run();
-                mediaServerService.releaseSsrc(mediaServerItem.getId(), sendRtpInfo.getSsrcToRelease());
                 sessionManager.removeByStream(sendRtpInfo.getApp(), sendRtpInfo.getStream());
             }
         }, userSetting.getPlayTimeout());
@@ -534,7 +532,6 @@ public class PlayServiceImpl implements IPlayService {
             Integer localPort = mediaServerService.startSendRtpPassive(mediaServerItem, sendRtpInfo, userSetting.getPlayTimeout() * 1000);
             if (localPort == null || localPort <= 0) {
                 timeoutCallback.run();
-                mediaServerService.releaseSsrc(mediaServerItem.getId(), sendRtpInfo.getSsrcToRelease());
                 sessionManager.removeByStream(sendRtpInfo.getApp(), sendRtpInfo.getStream());
                 return;
             }
@@ -543,7 +540,6 @@ public class PlayServiceImpl implements IPlayService {
             receiveRtpServerService.addAuthenticateInfoForGb28181Talk(mediaServerItem, sendRtpInfo.getStream());
 
         }catch (ControllerException e) {
-            mediaServerService.releaseSsrc(mediaServerItem.getId(), sendRtpInfo.getSsrcToRelease());
             log.info("[语音对讲]失败 deviceId: {}, channelId: {}", device.getDeviceId(), channel.getDeviceId());
             audioEvent.call("失败, " + e.getMessage());
             // 查看是否已经建立了通道，存在则发送bye
@@ -553,7 +549,7 @@ public class PlayServiceImpl implements IPlayService {
 
         // 查看设备是否已经在推流
         try {
-            cmder.talkStreamCmd(mediaServerItem, sendRtpInfo, device, channel, callId, (hookData) -> {
+            cmder.talkStreamCmd(mediaServerItem, sendRtpInfo, ySsrc, device, channel, callId, (hookData) -> {
                 log.info("[语音对讲] 流已生成， 开始推流： " + hookData);
                 dynamicTask.stop(timeOutTaskKey);
                 // TODO 暂不做处理
@@ -588,8 +584,6 @@ public class PlayServiceImpl implements IPlayService {
             }, (event) -> {
                 dynamicTask.stop(timeOutTaskKey);
                 receiveRtpServerService.closeRTPServer(mediaServerItem, sendRtpInfo.getApp(), sendRtpInfo.getStream());
-                // 释放ssrc
-                mediaServerService.releaseSsrc(mediaServerItem.getId(), sendRtpInfo.getSsrcToRelease());
                 sessionManager.removeByStream(sendRtpInfo.getApp(), sendRtpInfo.getStream());
                 errorEvent.response(event);
             }, userSetting.getPlayTimeout().longValue());
@@ -598,9 +592,6 @@ public class PlayServiceImpl implements IPlayService {
             log.error("[命令发送失败] 对讲消息: {}", e.getMessage());
             dynamicTask.stop(timeOutTaskKey);
             receiveRtpServerService.closeRTPServer(mediaServerItem, sendRtpInfo.getApp(), sendRtpInfo.getStream());
-            // 释放ssrc
-            mediaServerService.releaseSsrc(mediaServerItem.getId(), sendRtpInfo.getSsrcToRelease());
-
             sessionManager.removeByStream(sendRtpInfo.getApp(), sendRtpInfo.getStream());
             SipSubscribe.EventResult eventResult = new SipSubscribe.EventResult();
             eventResult.type = SipSubscribe.EventResultType.cmdSendFailEvent;
@@ -875,7 +866,6 @@ public class PlayServiceImpl implements IPlayService {
                     // ssrc检验
                     // 更新ssrc
                     log.info("[Invite 200OK] SSRC修正 {}->{}", ssrcInfo.getSsrc(), ssrcInResponse);
-                    releaseAllocatedSsrc(mediaServerItem, ssrcInfo);
                     Boolean result = mediaServerService.updateRtpServerSSRC(mediaServerItem, ssrcInfo.getApp(), ssrcInfo.getStream(), ssrcInResponse);
                     if (!result) {
                         try {
@@ -885,8 +875,6 @@ public class PlayServiceImpl implements IPlayService {
                             log.error("[命令发送失败] 停止播放， 发送BYE: {}", e.getMessage());
                         }
 
-                        mediaServerService.releaseSsrc(mediaServerItem.getId(), ssrcInfo.getSsrcToRelease());
-
                         sessionManager.removeByStream(ssrcInfo.getApp(), ssrcInfo.getStream());
 
                         callback.run(InviteErrorCode.ERROR_FOR_RESET_SSRC.getCode(),
@@ -897,7 +885,6 @@ public class PlayServiceImpl implements IPlayService {
 
                     }else {
                         ssrcInfo.setSsrc(ssrcInResponse);
-                        updateSsrcTransaction(ssrcInfo.getApp(), ssrcInfo.getStream(), ssrcInResponse, null);
                         inviteInfo.setSsrcInfo(ssrcInfo);
                         inviteInfo.setStream(ssrcInfo.getStream());
                         if (device.getStreamMode().equalsIgnoreCase("TCP-ACTIVE")) {
@@ -910,9 +897,7 @@ public class PlayServiceImpl implements IPlayService {
                         inviteStreamService.updateInviteInfo(inviteInfo);
                     }
                 } else {
-                    releaseAllocatedSsrc(mediaServerItem, ssrcInfo);
                     ssrcInfo.setSsrc(ssrcInResponse);
-                    updateSsrcTransaction(ssrcInfo.getApp(), ssrcInfo.getStream(), ssrcInResponse, null);
                     inviteInfo.setSsrcInfo(ssrcInfo);
                     inviteInfo.setStream(ssrcInfo.getStream());
                     if (device.getStreamMode().equalsIgnoreCase("TCP-ACTIVE")) {
@@ -932,14 +917,12 @@ public class PlayServiceImpl implements IPlayService {
                     if (ssrcTransaction == null) {
                         return;
                     }
-                    releaseAllocatedSsrc(mediaServerItem, ssrcInfo);
                     sessionManager.removeByStream(MediaStreamUtil.RTP_APP, inviteInfo.getStream());
                     inviteStreamService.updateInviteInfoForSSRC(inviteInfo, ssrcInResponse);
                     ssrcTransaction.setDeviceId(device.getDeviceId());
                     ssrcTransaction.setChannelId(ssrcTransaction.getChannelId());
                     ssrcTransaction.setCallId(ssrcTransaction.getCallId());
                     ssrcTransaction.setSsrc(ssrcInResponse);
-                    ssrcTransaction.setAllocatedSsrc(null);
                     ssrcTransaction.setApp(MediaStreamUtil.RTP_APP);
                     ssrcTransaction.setStream(inviteInfo.getStream());
                     ssrcTransaction.setMediaServerId(mediaServerItem.getId());
@@ -952,24 +935,6 @@ public class PlayServiceImpl implements IPlayService {
         }
     }
 
-    private void releaseAllocatedSsrc(MediaServer mediaServerItem, SSRCInfo ssrcInfo) {
-        if (ssrcInfo == null || ssrcInfo.getAllocatedSsrc() == null) {
-            return;
-        }
-        mediaServerService.releaseSsrc(mediaServerItem.getId(), ssrcInfo.getAllocatedSsrc());
-        ssrcInfo.setAllocatedSsrc(null);
-    }
-
-    private void updateSsrcTransaction(String app, String stream, String ssrc, String allocatedSsrc) {
-        SsrcTransaction ssrcTransaction = sessionManager.getSsrcTransactionByStream(app, stream);
-        if (ssrcTransaction == null) {
-            return;
-        }
-        ssrcTransaction.setSsrc(ssrc);
-        ssrcTransaction.setAllocatedSsrc(allocatedSsrc);
-        sessionManager.put(ssrcTransaction);
-    }
-
     @Override
     public void download(Device device, DeviceChannel channel, String startTime, String endTime, int downloadSpeed, ErrorCallback<StreamInfo> callback) {
 
@@ -1603,8 +1568,6 @@ public class PlayServiceImpl implements IPlayService {
             mediaServerService.stopSendRtp(mediaServer, sendRtpInfo.getApp(), sendRtpInfo.getStream(), sendRtpInfo.getSsrc());
         }
 
-        ssrcFactory.releaseSsrc(mediaServerId, sendRtpInfo.getSsrcToRelease());
-
         SsrcTransaction ssrcTransaction = sessionManager.getSsrcTransactionByStream(sendRtpInfo.getApp(), sendRtpInfo.getStream());
         if (ssrcTransaction != null) {
             try {

src/main/java/com/genersoft/iot/vmp/gb28181/session/SSRCFactory.java

@@ -1,143 +1,108 @@
 package com.genersoft.iot.vmp.gb28181.session;
 
+import com.alibaba.fastjson2.JSONObject;
 import com.genersoft.iot.vmp.conf.SipConfig;
-import com.genersoft.iot.vmp.conf.UserSetting;
+import com.genersoft.iot.vmp.media.bean.MediaServer;
+import com.genersoft.iot.vmp.media.service.IMediaServerService;
+import com.genersoft.iot.vmp.media.zlm.ZLMRESTfulUtils;
+import com.genersoft.iot.vmp.media.zlm.dto.ZLMResult;
+import jakarta.annotation.PostConstruct;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.data.redis.core.StringRedisTemplate;
 import org.springframework.stereotype.Component;
 
-import java.util.ArrayList;
+import java.util.BitSet;
 import java.util.List;
-import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ThreadLocalRandom;
+import java.util.concurrent.TimeUnit;
 
-/**
- * ssrc使用
- */
 @Slf4j
 @Component
 public class SSRCFactory {
 
-    /**
+    private final ConcurrentHashMap<String, BitSet> usedMap = new ConcurrentHashMap<>();
-     * 播流最大并发个数
+    private final ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor(r -> {
-     */
+        Thread t = new Thread(r, "ssrc-rebuild");
-    private static final Integer MAX_STREAM_COUNT = 10000;
+        t.setDaemon(true);
-
+        return t;
-    /**
+    });
-     * 播流最大并发个数
-     */
-    private static final String SSRC_INFO_KEY = "VMP_SSRC_INFO_";
 
     @Autowired
-    private StringRedisTemplate redisTemplate;
+    private ZLMRESTfulUtils zlmresTfulUtils;
+
+    @Autowired
+    private IMediaServerService mediaServerService;
 
     @Autowired
     private SipConfig sipConfig;
 
-    @Autowired
+    private String domainPart;
-    private UserSetting userSetting;
 
-
+    @PostConstruct
-    public void initMediaServerSSRC(String mediaServerId, Set<String> usedSet) {
+    public void init() {
-        String ssrcPrefix = getSsrcPrefix();
-        String redisKey = SSRC_INFO_KEY + userSetting.getServerId() + "_" + mediaServerId;
-        List<String> ssrcList = new ArrayList<>();
-        for (int i = 1; i < MAX_STREAM_COUNT; i++) {
-            String ssrc = String.format("%s%04d", ssrcPrefix, i);
-
-            if (null == usedSet || !usedSet.contains(ssrc)) {
-                ssrcList.add(ssrc);
-
-            }
-        }
-        if (redisTemplate.opsForSet().size(redisKey) != null) {
-            redisTemplate.delete(redisKey);
-        }
-        redisTemplate.opsForSet().add(redisKey, ssrcList.toArray(new String[0]));
-    }
-
-
-    /**
-     * 获取视频预览的SSRC值,第一位固定为0
-     *
-     * @return ssrc
-     */
-    public String getPlaySsrc(String mediaServerId) {
-        return "0" + getSN(mediaServerId);
-    }
-
-    /**
-     * 获取录像回放的SSRC值,第一位固定为1
-     */
-    public String getPlayBackSsrc(String mediaServerId) {
-        return "1" + getSN(mediaServerId);
-    }
-
-    /**
-     * 释放ssrc，主要用完的ssrc一定要释放，否则会耗尽
-     *
-     * @param ssrc 需要重置的ssrc
-     */
-    public void releaseSsrc(String mediaServerId, String ssrc) {
-        if (ssrc == null) {
-            return;
-        }
-        if (!isFactorySsrc(ssrc)) {
-            log.warn("[释放 SSRC] 忽略非SSRC池分配的值: {}", ssrc);
-            return;
-        }
-        String sn = ssrc.substring(1);
-        log.debug("[释放 SSRC] SSRC:{} -> SN: {}", ssrc, sn);
-        String redisKey = SSRC_INFO_KEY + userSetting.getServerId() + "_" + mediaServerId;
-        redisTemplate.opsForSet().add(redisKey, sn);
-    }
-
-    /**
-     * 获取后四位数SN,随机数
-     */
-    private String getSN(String mediaServerId) {
-        String redisKey = SSRC_INFO_KEY + userSetting.getServerId() + "_" + mediaServerId;
-        Long size = redisTemplate.opsForSet().size(redisKey);
-        if (size == null || size == 0) {
-            log.info("[获取 SSRC 失败] redisKey： {}", redisKey);
-            throw new RuntimeException("ssrc已经用完");
-        } else {
-            // 在集合中移除并返回一个随机成员。
-            return redisTemplate.opsForSet().pop(redisKey);
-        }
-    }
-
-    /**
-     * 重置一个流媒体服务的所有ssrc
-     *
-     * @param mediaServerId 流媒体服务ID
-     */
-    public void reset(String mediaServerId) {
-        this.initMediaServerSSRC(mediaServerId, null);
-    }
-
-    /**
-     * 是否已经存在了某个MediaServer的SSRC信息
-     *
-     * @param mediaServerId 流媒体服务ID
-     */
-    public boolean hasMediaServerSSRC(String mediaServerId) {
-        String redisKey = SSRC_INFO_KEY + userSetting.getServerId() + "_" + mediaServerId;
-        return Boolean.TRUE.equals(redisTemplate.hasKey(redisKey));
-    }
-
-    private String getSsrcPrefix() {
         String sipDomain = sipConfig.getDomain();
-        return sipDomain.length() >= 8 ? sipDomain.substring(3, 8) : sipDomain;
+        domainPart = sipDomain.length() >= 8 ? sipDomain.substring(3, 8) : sipDomain;
+        scheduler.scheduleAtFixedRate(this::rebuild, 10, 30, TimeUnit.SECONDS);
     }
 
-    private boolean isFactorySsrc(String ssrc) {
+    public String getPlaySsrc(String mediaServerId) {
-        if (ssrc.length() < 2) {
+        String suffix = allocate(mediaServerId);
-            return false;
+        return suffix != null ? "0" + suffix : null;
-        }
-        String sn = ssrc.substring(1);
-        String ssrcPrefix = getSsrcPrefix();
-        return sn.length() == ssrcPrefix.length() + 4 && sn.startsWith(ssrcPrefix);
     }
 
+    public String getPlayBackSsrc(String mediaServerId) {
+        String suffix = allocate(mediaServerId);
+        return suffix != null ? "1" + suffix : null;
+    }
+
+    private String allocate(String mediaServerId) {
+        BitSet bits = usedMap.computeIfAbsent(mediaServerId, k -> new BitSet(10000));
+        int start = ThreadLocalRandom.current().nextInt(10000);
+        int index = start;
+        do {
+            if (!bits.get(index)) {
+                bits.set(index);
+                return domainPart + String.format("%04d", index);
+            }
+            index = (index + 1) % 10000;
+        } while (index != start);
+        log.warn("[SSRC] 媒体节点 {} 的SSRC已用尽", mediaServerId);
+        return null;
+    }
+
+    void rebuild() {
+        List<MediaServer> servers = mediaServerService.getAll();
+        for (MediaServer server : servers) {
+            BitSet bits = new BitSet(10000);
+            int count = 0;
+            try {
+                ZLMResult<?> result = zlmresTfulUtils.getMediaList(server, null, null, "rtsp", null);
+                if (result != null && result.getCode() == 0 && result.getData() != null) {
+                    List<JSONObject> list = (List<JSONObject>) result.getData();
+                    for (JSONObject obj : list) {
+                        if (obj.getIntValue("originType") != 3) continue;
+                        String originUrl = obj.getString("originUrl");
+                        if (originUrl == null) continue;
+                        int idx = originUrl.lastIndexOf("/rtp/");
+                        if (idx == -1) continue;
+                        try {
+                            int suffix = (int) (Long.parseLong(originUrl.substring(idx + 5), 16) % 10000);
+                            bits.set(suffix);
+                            count++;
+                        } catch (NumberFormatException ignored) {
+                        }
+                    }
+                }
+            } catch (Exception e) {
+                log.warn("[SSRC重建] 查询媒体节点 {} 失败: {}", server.getId(), e.getMessage());
+            }
+            usedMap.put(server.getId(), bits);
+            if (log.isDebugEnabled()) {
+                log.debug("[SSRC重建] 节点 {} 已占用 {} 个SSRC", server.getId(), count);
+            }
+        }
+    }
 }

src/main/java/com/genersoft/iot/vmp/gb28181/session/SendSsrcFactory.java

@@ -0,0 +1,29 @@
+package com.genersoft.iot.vmp.gb28181.session;
+
+import com.genersoft.iot.vmp.conf.SipConfig;
+import jakarta.annotation.PostConstruct;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import java.util.concurrent.ThreadLocalRandom;
+
+@Slf4j
+@Component
+public class SendSsrcFactory {
+
+    @Autowired
+    private SipConfig sipConfig;
+
+    private String domainPart;
+
+    @PostConstruct
+    public void init() {
+        String sipDomain = sipConfig.getDomain();
+        domainPart = sipDomain.length() >= 8 ? sipDomain.substring(3, 8) : sipDomain;
+    }
+
+    public String getSendSsrc(String prefix) {
+        return prefix + domainPart + String.format("%04d", ThreadLocalRandom.current().nextInt(10000));
+    }
+}

src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/ISIPCommander.java

@@ -94,7 +94,7 @@ public interface ISIPCommander {
 	 */
 	void streamByeCmd(Device device, String channelId, String app, String stream, String callId, SipSubscribe.Event okEvent) throws InvalidArgumentException, SipException, ParseException, SsrcTransactionNotFoundException;
 
-	void talkStreamCmd(MediaServer mediaServerItem, SendRtpInfo sendRtpItem, Device device, DeviceChannel channelId, String callId, HookSubscribe.Event event, HookSubscribe.Event eventForPush, SipSubscribe.Event okEvent, SipSubscribe.Event errorEvent, Long timeout) throws InvalidArgumentException, SipException, ParseException;
+	void talkStreamCmd(MediaServer mediaServerItem, SendRtpInfo sendRtpItem, String ySsrc, Device device, DeviceChannel channelId, String callId, HookSubscribe.Event event, HookSubscribe.Event eventForPush, SipSubscribe.Event okEvent, SipSubscribe.Event errorEvent, Long timeout) throws InvalidArgumentException, SipException, ParseException;
 
 	void streamByeCmd(Device device, String channelId, SipTransactionInfo sipTransactionInfo, SipSubscribe.Event okEvent) throws InvalidArgumentException, SipException, ParseException, SsrcTransactionNotFoundException;
 

src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/impl/SIPCommander.java

@@ -281,7 +281,6 @@ public class SIPCommander implements ISIPCommander {
         Request request = headerProvider.createInviteRequest(device, channel.getDeviceId(), content.toString(), SipUtils.getNewViaTag(), SipUtils.getNewFromTag(), null, ssrcInfo.getSsrc(),sipSender.getNewCallIdHeader(sipLayer.getLocalIp(device.getLocalIp()),device.getTransport()));
         sipSender.transmitRequest(sipLayer.getLocalIp(device.getLocalIp()), request, (e -> {
             sessionManager.removeByStream(ssrcInfo.getApp(), ssrcInfo.getStream());
-            mediaServerService.releaseSsrc(mediaServerItem.getId(), ssrcInfo.getSsrcToRelease());
             errorEvent.response(e);
         }), e -> {
             ResponseEvent responseEvent = (ResponseEvent) e.event;
@@ -290,7 +289,6 @@ public class SIPCommander implements ISIPCommander {
             SsrcTransaction ssrcTransaction = SsrcTransaction.buildForDevice(device.getDeviceId(), channel.getId(),
                     callId,ssrcInfo.getApp(), ssrcInfo.getStream(), ssrcInfo.getSsrc(), mediaServerItem.getId(), response,
                     InviteSessionType.PLAY);
-            ssrcTransaction.setAllocatedSsrc(ssrcInfo.getAllocatedSsrc());
             sessionManager.put(ssrcTransaction);
             okEvent.response(e);
         }, timeout);
@@ -388,7 +386,6 @@ public class SIPCommander implements ISIPCommander {
                     channel.getId(), sipSender.getNewCallIdHeader(sipLayer.getLocalIp(device.getLocalIp()),
                             device.getTransport()).getCallId(), ssrcInfo.getApp(), ssrcInfo.getStream(), ssrcInfo.getSsrc(),
                     mediaServerItem.getId(), response, InviteSessionType.PLAYBACK);
-            ssrcTransaction.setAllocatedSsrc(ssrcInfo.getAllocatedSsrc());
             sessionManager.put(ssrcTransaction);
             okEvent.response(event);
         }, timeout);
@@ -482,14 +479,13 @@ public class SIPCommander implements ISIPCommander {
             SsrcTransaction ssrcTransaction = SsrcTransaction.buildForDevice(device.getDeviceId(), channel.getId(),
                     response.getCallIdHeader().getCallId(), ssrcInfo.getApp(), ssrcInfo.getStream(), ssrc,
                     mediaServerItem.getId(), response, InviteSessionType.DOWNLOAD);
-            ssrcTransaction.setAllocatedSsrc(ssrcInfo.getAllocatedSsrc());
             sessionManager.put(ssrcTransaction);
             okEvent.response(event);
         }, timeout);
     }
 
     @Override
-    public void talkStreamCmd(MediaServer mediaServerItem, SendRtpInfo sendRtpItem, Device device, DeviceChannel channel,
+    public void talkStreamCmd(MediaServer mediaServerItem, SendRtpInfo sendRtpItem, String ySsrc, Device device, DeviceChannel channel,
                               String callId, HookSubscribe.Event event, HookSubscribe.Event eventForPush, SipSubscribe.Event okEvent,
                               SipSubscribe.Event errorEvent, Long timeout) throws InvalidArgumentException, SipException, ParseException {
 
@@ -535,22 +531,20 @@ public class SIPCommander implements ISIPCommander {
         content.append("a=sendrecv\r\n");
         content.append("a=rtpmap:8 PCMA/8000\r\n");
 
-        content.append("y=" + sendRtpItem.getSsrc() + "\r\n");//ssrc
+        content.append("y=" + ySsrc + "\r\n");//ssrc
         // f字段:f= v/编码格式/分辨率/帧率/码率类型/码率大小a/编码格式/码率大小/采样率
         content.append("f=v/////a/1/8/1" + "\r\n");
 
         Request request = headerProvider.createInviteRequest(device, channel.getDeviceId(), content.toString(),
-                SipUtils.getNewViaTag(), SipUtils.getNewFromTag(), null, sendRtpItem.getSsrc(), callIdHeader);
+                SipUtils.getNewViaTag(), SipUtils.getNewFromTag(), null, ySsrc, callIdHeader);
         sipSender.transmitRequest(sipLayer.getLocalIp(device.getLocalIp()), request, (e -> {
             sessionManager.removeByStream(sendRtpItem.getApp(), sendRtpItem.getStream());
-            mediaServerService.releaseSsrc(mediaServerItem.getId(), sendRtpItem.getSsrcToRelease());
             errorEvent.response(e);
         }), e -> {
             // 这里为例避免一个通道的点播只有一个callID这个参数使用一个固定值
             ResponseEvent responseEvent = (ResponseEvent) e.event;
             SIPResponse response = (SIPResponse) responseEvent.getResponse();
             SsrcTransaction ssrcTransaction = SsrcTransaction.buildForDevice(device.getDeviceId(), channel.getId(), MediaStreamUtil.GB28181_TALK,sendRtpItem.getApp(), stream, sendRtpItem.getSsrc(), mediaServerItem.getId(), response, InviteSessionType.TALK);
-            ssrcTransaction.setAllocatedSsrc(sendRtpItem.getAllocatedSsrc());
             sessionManager.put(ssrcTransaction);
             okEvent.response(e);
         }, timeout);

src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/impl/SIPCommanderForPlatform.java

@@ -642,7 +642,6 @@ public class SIPCommanderForPlatform implements ISIPCommanderForPlatform {
         String mediaServerId = sendRtpItem.getMediaServerId();
         MediaServer mediaServerItem = mediaServerService.getOne(mediaServerId);
         if (mediaServerItem != null) {
-            mediaServerService.releaseSsrc(mediaServerItem.getId(), sendRtpItem.getSsrcToRelease());
             receiveRtpServerService.closeRTPServer(mediaServerItem, sendRtpItem.getApp(), sendRtpItem.getStream());
         }
         SIPRequest byeRequest = headerProviderPlatformProvider.createByeRequest(platform, sendRtpItem, channel);
@@ -744,14 +743,12 @@ public class SIPCommanderForPlatform implements ISIPCommanderForPlatform {
                 callIdHeader);
         sipSender.transmitRequest(sipLayer.getLocalIp(platform.getDeviceIp()), request, (e -> {
             sessionManager.removeByStream(ssrcInfo.getApp(), ssrcInfo.getStream());
-            mediaServerService.releaseSsrc(mediaServer.getId(), ssrcInfo.getSsrcToRelease());
             errorEvent.response(e);
         }), e -> {
             ResponseEvent responseEvent = (ResponseEvent) e.event;
             SIPResponse response = (SIPResponse) responseEvent.getResponse();
             SsrcTransaction ssrcTransaction = SsrcTransaction.buildForPlatform(platform.getServerGBId(), channel.getGbId(),
                     callIdHeader.getCallId(), ssrcInfo.getApp(),  stream, ssrcInfo.getSsrc(), mediaServer.getId(), response, InviteSessionType.BROADCAST);
-            ssrcTransaction.setAllocatedSsrc(ssrcInfo.getAllocatedSsrc());
             sessionManager.put(ssrcTransaction);
             okEvent.response(e);
         });

src/main/java/com/genersoft/iot/vmp/gb28181/transmit/event/request/impl/ByeRequestProcessor.java

@@ -131,9 +131,6 @@ public class ByeRequestProcessor extends SIPRequestProcessorParent implements In
 						sendRtpServerService.deleteByCallId(callIdHeader.getCallId());
 						if (mediaServer != null) {
 							mediaServerService.stopSendRtp(mediaServer, sendRtpItem.getApp(), sendRtpItem.getStream(), sendRtpItem.getSsrc());
-							if (userSetting.getUseCustomSsrcForParentInvite()) {
-								mediaServerService.releaseSsrc(mediaServer.getId(), sendRtpItem.getSsrcToRelease());
-							}
 						}
 					}
 				}else {
@@ -143,9 +140,6 @@ public class ByeRequestProcessor extends SIPRequestProcessorParent implements In
 				MediaServer mediaInfo = mediaServerService.getOne(sendRtpItem.getMediaServerId());
 				sendRtpServerService.delete(sendRtpItem);
 				mediaServerService.stopSendRtp(mediaInfo, sendRtpItem.getApp(), sendRtpItem.getStream(), sendRtpItem.getSsrc());
-				if (userSetting.getUseCustomSsrcForParentInvite()) {
-					mediaServerService.releaseSsrc(mediaInfo.getId(), sendRtpItem.getSsrcToRelease());
-				}
 			}
 			if (sendRtpItem.getServerId().equals(userSetting.getServerId())) {
 				MediaServer mediaServer = mediaServerService.getOne(sendRtpItem.getMediaServerId());
@@ -251,11 +245,6 @@ public class ByeRequestProcessor extends SIPRequestProcessorParent implements In
 					}
 					break;
 			}
-			// 释放ssrc
-			MediaServer mediaServerItem = mediaServerService.getOne(ssrcTransaction.getMediaServerId());
-			if (mediaServerItem != null) {
-				mediaServerService.releaseSsrc(mediaServerItem.getId(), ssrcTransaction.getSsrcToRelease());
-			}
 			sessionManager.removeByCallId(ssrcTransaction.getCallId());
 		}
 	}

src/main/java/com/genersoft/iot/vmp/gb28181/transmit/event/request/impl/InviteRequestProcessor.java

@@ -9,7 +9,7 @@ import com.genersoft.iot.vmp.conf.exception.ControllerException;
 import com.genersoft.iot.vmp.gb28181.bean.*;
 import com.genersoft.iot.vmp.gb28181.service.*;
 import com.genersoft.iot.vmp.gb28181.session.AudioBroadcastManager;
-import com.genersoft.iot.vmp.gb28181.session.SSRCFactory;
+import com.genersoft.iot.vmp.gb28181.session.SendSsrcFactory;
 import com.genersoft.iot.vmp.gb28181.session.SipInviteSessionManager;
 import com.genersoft.iot.vmp.gb28181.transmit.SIPProcessorObserver;
 import com.genersoft.iot.vmp.gb28181.transmit.cmd.ISIPCommanderForPlatform;
@@ -39,7 +39,6 @@ import javax.sip.RequestEvent;
 import javax.sip.SipException;
 import javax.sip.header.CallIdHeader;
 import javax.sip.message.Response;
-import java.security.SecureRandom;
 import java.text.ParseException;
 import java.util.List;
 import java.util.Vector;
@@ -103,7 +102,7 @@ public class InviteRequestProcessor extends SIPRequestProcessorParent implements
     private UserSetting userSetting;
 
     @Autowired
-    private SSRCFactory ssrcFactory;
+    private SendSsrcFactory sendSsrcFactory;
 
 
     @Override
@@ -175,22 +174,14 @@ public class InviteRequestProcessor extends SIPRequestProcessorParent implements
                         // 点播成功， TODO 可以在此处检测cancel命令是否存在，存在则不发送
                         if (userSetting.getUseCustomSsrcForParentInvite()) {
                             // 上级平台点播时不使用上级平台指定的ssrc，使用自定义的ssrc，参考国标文档-点播外域设备媒体流SSRC处理方式
-                            MediaServer mediaServer = mediaServerService.getOne(streamInfo.getMediaServer().getId());
+                            finalInviteInfo.setSsrc(sendSsrcFactory.getSendSsrc(
-                            if (mediaServer != null) {
+                                    "Play".equalsIgnoreCase(finalInviteInfo.getSessionName()) ? "0" : "1"));
-                                String ssrc = "Play".equalsIgnoreCase(finalInviteInfo.getSessionName())
-                                        ? ssrcFactory.getPlaySsrc(streamInfo.getMediaServer().getId())
-                                        : ssrcFactory.getPlayBackSsrc(streamInfo.getMediaServer().getId());
-                                finalInviteInfo.setSsrc(ssrc);
-                                finalInviteInfo.setAllocatedSsrc(ssrc);
-                                finalInviteInfo.setAllocatedSsrcMediaServerId(streamInfo.getMediaServer().getId());
-                            }
                         }
                         // 构建sendRTP内容
                         SendRtpInfo sendRtpItem = sendRtpServerService.createSendRtpInfo(streamInfo.getMediaServer(),
                                 finalInviteInfo.getIp(), finalInviteInfo.getPort(), finalInviteInfo.getSsrc(), platform.getServerGBId(),
                                 streamInfo.getApp(), streamInfo.getStream(),
                                 channel.getGbId(), finalInviteInfo.isTcp(), platform.isRtcp());
-                        sendRtpItem.setAllocatedSsrc(finalInviteInfo.getAllocatedSsrc());
                         if (finalInviteInfo.isTcp() && finalInviteInfo.isTcpActive()) {
                             sendRtpItem.setTcpActive(true);
                         }
@@ -208,7 +199,6 @@ public class InviteRequestProcessor extends SIPRequestProcessorParent implements
                         // 超时未收到Ack应该回复bye,当前等待时间为10秒
                         dynamicTask.startDelay(finalInviteInfo.getCallId(), () -> {
                             log.info("[Ack ] 等待超时, {}/{}", finalInviteInfo.getCallId(), channel.getGbDeviceId());
-                            mediaServerService.releaseSsrc(streamInfo.getMediaServer().getId(), sendRtpItem.getSsrcToRelease());
                             // 回复bye
                             sendBye(platform, finalInviteInfo.getCallId());
                         }, 60 * 1000);
@@ -249,7 +239,6 @@ public class InviteRequestProcessor extends SIPRequestProcessorParent implements
                 log.error("[命令发送失败] invite BAD_REQUEST: {}", sendException.getMessage());
             }
         } catch (PlayException e) {
-            releaseAllocatedSsrc(inviteInfo);
             try {
                 responseAck(request, e.getCode(), e.getMsg());
             } catch (SipException | InvalidArgumentException | ParseException sendException) {
@@ -257,7 +246,6 @@ public class InviteRequestProcessor extends SIPRequestProcessorParent implements
             }
         } catch (Exception e) {
             log.error("[Invite处理异常] ", e);
-            releaseAllocatedSsrc(inviteInfo);
             try {
                 responseAck(request, Response.SERVER_INTERNAL_ERROR, "");
             } catch (SipException | InvalidArgumentException | ParseException sendException) {
@@ -266,15 +254,6 @@ public class InviteRequestProcessor extends SIPRequestProcessorParent implements
         }
     }
 
-    private void releaseAllocatedSsrc(InviteMessageInfo inviteInfo) {
-        if (inviteInfo == null || inviteInfo.getAllocatedSsrc() == null || inviteInfo.getAllocatedSsrcMediaServerId() == null) {
-            return;
-        }
-        mediaServerService.releaseSsrc(inviteInfo.getAllocatedSsrcMediaServerId(), inviteInfo.getAllocatedSsrc());
-        inviteInfo.setAllocatedSsrc(null);
-        inviteInfo.setAllocatedSsrcMediaServerId(null);
-    }
-
     private InviteMessageInfo decode(RequestEvent evt) throws SdpException {
 
         InviteMessageInfo inviteInfo = new InviteMessageInfo();
@@ -499,7 +478,7 @@ public class InviteRequestProcessor extends SIPRequestProcessorParent implements
             SessionDescription sdp = gb28181Sdp.getBaseSdb();
 
             if (ObjectUtils.isEmpty(gb28181Sdp.getSsrc()) ) {
-                String ssrc =  Integer.toUnsignedString(new SecureRandom().nextInt());
+                String ssrc =  sendSsrcFactory.getSendSsrc("0");
                 log.warn("来自设备的Invite请求，未携带SSRC，生成随机ssrc: {}，requesterId： {}/{}", ssrc, inviteInfo.getRequesterId(), inviteInfo.getSourceChannelId());
                 gb28181Sdp.setSsrc(ssrc);
             }

src/main/java/com/genersoft/iot/vmp/media/service/IMediaServerService.java

@@ -49,8 +49,6 @@ public interface IMediaServerService {
 
     void removeCount(String mediaServerId);
 
-    void releaseSsrc(String mediaServerItemId, String ssrc);
-
     void clearMediaServerForOnline();
 
     void add(MediaServer mediaSerItem);

src/main/java/com/genersoft/iot/vmp/media/service/impl/MediaServerServiceImpl.java

@@ -9,7 +9,6 @@ import com.genersoft.iot.vmp.conf.exception.ControllerException;
 import com.genersoft.iot.vmp.gb28181.bean.SendRtpInfo;
 import com.genersoft.iot.vmp.gb28181.bean.TalkRtpInfo;
 import com.genersoft.iot.vmp.gb28181.service.IInviteStreamService;
-import com.genersoft.iot.vmp.gb28181.session.SSRCFactory;
 import com.genersoft.iot.vmp.media.bean.MediaInfo;
 import com.genersoft.iot.vmp.media.bean.MediaServer;
 import com.genersoft.iot.vmp.media.bean.RecordInfo;
@@ -57,9 +56,6 @@ import java.util.*;
 @Service
 public class MediaServerServiceImpl implements IMediaServerService {
 
-    @Autowired
-    private SSRCFactory ssrcFactory;
-
     @Autowired
     private UserSetting userSetting;
 
@@ -150,10 +146,6 @@ public class MediaServerServiceImpl implements IMediaServerService {
             if (ObjectUtils.isEmpty(mediaServer.getId())) {
                 continue;
             }
-            // 更新
-            if (!ssrcFactory.hasMediaServerSSRC(mediaServer.getId())) {
-                ssrcFactory.initMediaServerSSRC(mediaServer.getId(), null);
-            }
             // 查询redis是否存在此mediaServer
             String key = VideoManagerConstants.MEDIA_SERVER_PREFIX + userSetting.getServerId();
             Boolean hasKey = redisTemplate.hasKey(key);
@@ -229,21 +221,11 @@ public class MediaServerServiceImpl implements IMediaServerService {
         return mediaNodeServerService.updateRtpServerSSRC(mediaServer, app, streamId, ssrc);
     }
 
-    @Override
-    public void releaseSsrc(String mediaServerId, String ssrc) {
-        MediaServer mediaServer = getOne(mediaServerId);
-        if (mediaServer == null || ssrc == null) {
-            return;
-        }
-        ssrcFactory.releaseSsrc(mediaServerId, ssrc);
-    }
-
     /**
      * 媒体服务节点 重启后重置他的推流信息， TODO 给正在使用的设备发送停止命令
      */
     @Override
     public void clearRTPServer(MediaServer mediaServer) {
-        ssrcFactory.reset(mediaServer.getId());
     }
 
     @Override
@@ -254,12 +236,6 @@ public class MediaServerServiceImpl implements IMediaServerService {
             mediaServerMapper.add(mediaServer);
         }
 
-        MediaServer mediaServerInRedis = getOne(mediaServer.getId());
-
-        if (mediaServerInRedis == null || !ssrcFactory.hasMediaServerSSRC(mediaServer.getId())) {
-            ssrcFactory.initMediaServerSSRC(mediaServer.getId(),null);
-        }
-
         String key = VideoManagerConstants.MEDIA_SERVER_PREFIX + userSetting.getServerId();
         redisTemplate.opsForHash().put(key, mediaServer.getId(), mediaServer);
         if (mediaServer.isStatus()) {

src/main/java/com/genersoft/iot/vmp/service/bean/SSRCInfo.java

@@ -7,7 +7,6 @@ public class SSRCInfo {
 
     private int port;
     private String ssrc;
-    private String allocatedSsrc;
     private String app;
     private String stream;
 
@@ -18,8 +17,4 @@ public class SSRCInfo {
         this.stream = stream;
     }
 
-    public String getSsrcToRelease() {
-        return allocatedSsrc;
-    }
-
 }

src/main/java/com/genersoft/iot/vmp/service/impl/RtpServerServiceImpl.java

@@ -106,9 +106,6 @@ public class RtpServerServiceImpl implements IReceiveRtpServerService {
         }
 
         SSRCInfo ssrcInfo = new SSRCInfo(0, ssrc, MediaStreamUtil.RTP_APP, streamId);
-        if (presetSSRC == null) {
-            ssrcInfo.setAllocatedSsrc(ssrc);
-        }
         RTPServerParam rtpServerParam = new RTPServerParam(mediaServer, MediaStreamUtil.RTP_APP, streamId, ssrcCheck ? Long.parseLong(ssrc): 0L, null, onlyAuto, disableAuto, false, tcpMode);
         int rtpServerPort = openCommonRTPServer(rtpServerParam, ((code, msg, data) -> {
             if (code == InviteErrorCode.SUCCESS.getCode()) {
@@ -117,11 +114,6 @@ public class RtpServerServiceImpl implements IReceiveRtpServerService {
                 openRTPServerResult.setSsrcInfo(ssrcInfo);
                 callback.run(InviteErrorCode.SUCCESS.getCode(), InviteErrorCode.SUCCESS.getMsg(), openRTPServerResult);
             } else {
-                // 释放ssrc
-                if (presetSSRC == null) {
-                    ssrcFactory.releaseSsrc(mediaServer.getId(), ssrc);
-                    ssrcInfo.setAllocatedSsrc(null);
-                }
                 OpenRTPServerResult openRTPServerResult = new OpenRTPServerResult();
                 openRTPServerResult.setSsrcInfo(ssrcInfo);
                 callback.run(code, msg, openRTPServerResult);
@@ -170,9 +162,6 @@ public class RtpServerServiceImpl implements IReceiveRtpServerService {
         Long checkSsrc = device.isSsrcCheck() ? Long.parseLong(ssrc) : 0L;
 
         SSRCInfo ssrcInfo = new SSRCInfo(0, ssrc, MediaStreamUtil.RTP_APP, streamReplace != null ? streamReplace : streamId);
-        if (presetSSRC == null) {
-            ssrcInfo.setAllocatedSsrc(ssrc);
-        }
         openRtpServer(mediaServer, ssrcInfo, checkSsrc, !channel.isHasAudio(), false, tcpMode, callback);
         addAuthenticateInfo(streamId, streamReplace, channel.isHasAudio(),  record, null);
         return ssrcInfo;
@@ -212,7 +201,6 @@ public class RtpServerServiceImpl implements IReceiveRtpServerService {
         Long checkSsrc = device.isSsrcCheck() ? Long.parseLong(ssrc) : 0L;
 
         SSRCInfo ssrcInfo = new SSRCInfo(0, ssrc, MediaStreamUtil.RTP_APP, streamReplace != null ? streamReplace : streamId);
-        ssrcInfo.setAllocatedSsrc(ssrc);
         openRtpServer(mediaServer, ssrcInfo, checkSsrc, !channel.isHasAudio(), false, tcpMode, callback);
         addAuthenticateInfo(streamId, streamReplace,  channel.isHasAudio(), false,null);
         return ssrcInfo;
@@ -255,7 +243,6 @@ public class RtpServerServiceImpl implements IReceiveRtpServerService {
         Long checkSsrc = device.isSsrcCheck() ? Long.parseLong(ssrc) : 0L;
 
         SSRCInfo ssrcInfo = new SSRCInfo(0, ssrc, MediaStreamUtil.RTP_APP, streamId);
-        ssrcInfo.setAllocatedSsrc(ssrc);
         openRtpServer(mediaServer, ssrcInfo, checkSsrc, !channel.isHasAudio(), false, tcpMode, callback);
 
         long difference = DateUtil.getDifference(startTime, endTime) / 1000;
@@ -294,7 +281,6 @@ public class RtpServerServiceImpl implements IReceiveRtpServerService {
         String ssrc = ssrcFactory.getPlaySsrc(mediaServer.getId());
 
         SSRCInfo ssrcInfo = new SSRCInfo(0, ssrc, MediaStreamUtil.RTP_APP, streamId);
-        ssrcInfo.setAllocatedSsrc(ssrc);
         openRtpServer(mediaServer, ssrcInfo, 0L, false, true, tcpMode, callback);
         return ssrcInfo;
     }
@@ -310,11 +296,6 @@ public class RtpServerServiceImpl implements IReceiveRtpServerService {
                 openRTPServerResult.setSsrcInfo(ssrcInfo);
                 callback.run(InviteErrorCode.SUCCESS.getCode(), InviteErrorCode.SUCCESS.getMsg(), openRTPServerResult);
             } else {
-                // 释放ssrc
-                if (ssrcInfo.getAllocatedSsrc() != null) {
-                    ssrcFactory.releaseSsrc(mediaServer.getId(), ssrcInfo.getAllocatedSsrc());
-                    ssrcInfo.setAllocatedSsrc(null);
-                }
                 OpenRTPServerResult openRTPServerResult = new OpenRTPServerResult();
                 openRTPServerResult.setSsrcInfo(ssrcInfo);
                 callback.run(code, msg, openRTPServerResult);

src/main/java/com/genersoft/iot/vmp/service/redisMsg/control/RedisRpcSendRtpController.java

@@ -5,7 +5,7 @@ import com.genersoft.iot.vmp.conf.exception.ControllerException;
 import com.genersoft.iot.vmp.conf.redis.bean.RedisRpcRequest;
 import com.genersoft.iot.vmp.conf.redis.bean.RedisRpcResponse;
 import com.genersoft.iot.vmp.gb28181.bean.SendRtpInfo;
-import com.genersoft.iot.vmp.gb28181.session.SSRCFactory;
+import com.genersoft.iot.vmp.gb28181.session.SendSsrcFactory;
 import com.genersoft.iot.vmp.media.bean.MediaInfo;
 import com.genersoft.iot.vmp.media.bean.MediaServer;
 import com.genersoft.iot.vmp.media.service.IMediaServerService;
@@ -25,7 +25,7 @@ import org.springframework.stereotype.Component;
 public class RedisRpcSendRtpController extends RpcController {
 
     @Autowired
-    private SSRCFactory ssrcFactory;
+    private SendSsrcFactory sendSsrcFactory;
 
     @Autowired
     private IMediaServerService mediaServerService;
@@ -71,10 +71,8 @@ public class RedisRpcSendRtpController extends RpcController {
         sendRtpItem.setServerId(userSetting.getServerId());
         sendRtpItem.setLocalIp(mediaServerItem.getSdpIp());
         if (sendRtpItem.getSsrc() == null) {
-            // 上级平台点播时不使用上级平台指定的ssrc，使用自定义的ssrc，参考国标文档-点播外域设备媒体流SSRC处理方式
+            sendRtpItem.setSsrc(sendSsrcFactory.getSendSsrc(
-            String ssrc = "Play".equalsIgnoreCase(sendRtpItem.getSessionName()) ? ssrcFactory.getPlaySsrc(mediaServerItem.getId()) : ssrcFactory.getPlayBackSsrc(mediaServerItem.getId());
+                    "Play".equalsIgnoreCase(sendRtpItem.getSessionName()) ? "0" : "1"));
-            sendRtpItem.setSsrc(ssrc);
-            sendRtpItem.setAllocatedSsrc(ssrc);
         }
         sendRtpServerService.update(sendRtpItem);
         RedisRpcResponse response = request.getResponse();
@@ -173,9 +171,7 @@ public class RedisRpcSendRtpController extends RpcController {
             return;
         }
         sendRtpServerService.delete(sendRtpItem);
-        if (sendRtpItem.getMediaServerId() != null) {
+
-            mediaServerService.releaseSsrc(sendRtpItem.getMediaServerId(), sendRtpItem.getSsrcToRelease());
-        }
     }
 
 }

src/main/java/com/genersoft/iot/vmp/service/redisMsg/control/RedisRpcStreamPushController.java

@@ -8,7 +8,7 @@ import com.genersoft.iot.vmp.conf.redis.bean.RedisRpcMessage;
 import com.genersoft.iot.vmp.conf.redis.bean.RedisRpcRequest;
 import com.genersoft.iot.vmp.conf.redis.bean.RedisRpcResponse;
 import com.genersoft.iot.vmp.gb28181.bean.SendRtpInfo;
-import com.genersoft.iot.vmp.gb28181.session.SSRCFactory;
+import com.genersoft.iot.vmp.gb28181.session.SendSsrcFactory;
 import com.genersoft.iot.vmp.media.bean.MediaServer;
 import com.genersoft.iot.vmp.media.event.hook.Hook;
 import com.genersoft.iot.vmp.media.event.hook.HookSubscribe;
@@ -31,7 +31,7 @@ import org.springframework.stereotype.Component;
 public class RedisRpcStreamPushController extends RpcController {
 
     @Autowired
-    private SSRCFactory ssrcFactory;
+    private SendSsrcFactory sendSsrcFactory;
 
     @Autowired
     private IMediaServerService mediaServerService;
@@ -73,10 +73,8 @@ public class RedisRpcStreamPushController extends RpcController {
             log.info("[redis-rpc] 监听流上线时发现流已存在直接返回： {}/{}, 目标地址： {}：{}", sendRtpItem.getApp(), sendRtpItem.getStream(), sendRtpItem.getIp(), sendRtpItem.getPort() );
             // 读取redis中的上级点播信息，生成sendRtpItm发送出去
             if (sendRtpItem.getSsrc() == null) {
-                // 上级平台点播时不使用上级平台指定的ssrc，使用自定义的ssrc，参考国标文档-点播外域设备媒体流SSRC处理方式
+                sendRtpItem.setSsrc(sendSsrcFactory.getSendSsrc(
-                String ssrc = "Play".equalsIgnoreCase(sendRtpItem.getSessionName()) ? ssrcFactory.getPlaySsrc(mediaServer.getId()) : ssrcFactory.getPlayBackSsrc(mediaServer.getId());
+                        "Play".equalsIgnoreCase(sendRtpItem.getSessionName()) ? "0" : "1"));
-                sendRtpItem.setSsrc(ssrc);
-                sendRtpItem.setAllocatedSsrc(ssrc);
             }
             sendRtpItem.setMediaServerId(mediaServer.getId());
             sendRtpItem.setLocalIp(mediaServer.getSdpIp());
@@ -93,10 +91,8 @@ public class RedisRpcStreamPushController extends RpcController {
             log.info("[redis-rpc] 监听流上线，流已上线： {}/{}, 目标地址： {}：{}", sendRtpItem.getApp(), sendRtpItem.getStream(), sendRtpItem.getIp(), sendRtpItem.getPort());
             // 读取redis中的上级点播信息，生成sendRtpItm发送出去
             if (sendRtpItem.getSsrc() == null) {
-                // 上级平台点播时不使用上级平台指定的ssrc，使用自定义的ssrc，参考国标文档-点播外域设备媒体流SSRC处理方式
+                sendRtpItem.setSsrc(sendSsrcFactory.getSendSsrc(
-                String ssrc = "Play".equalsIgnoreCase(sendRtpItem.getSessionName()) ? ssrcFactory.getPlaySsrc(hookData.getMediaServer().getId()) : ssrcFactory.getPlayBackSsrc(hookData.getMediaServer().getId());
+                        "Play".equalsIgnoreCase(sendRtpItem.getSessionName()) ? "0" : "1"));
-                sendRtpItem.setSsrc(ssrc);
-                sendRtpItem.setAllocatedSsrc(ssrc);
             }
             sendRtpItem.setMediaServerId(hookData.getMediaServer().getId());
             sendRtpItem.setLocalIp(hookData.getMediaServer().getSdpIp());

src/main/java/com/genersoft/iot/vmp/service/redisMsg/service/RedisRpcServiceImpl.java

@@ -12,7 +12,7 @@ import com.genersoft.iot.vmp.conf.redis.bean.RedisRpcResponse;
 import com.genersoft.iot.vmp.gb28181.bean.*;
 import com.genersoft.iot.vmp.gb28181.controller.bean.ChannelListForRpcParam;
 import com.genersoft.iot.vmp.gb28181.event.subscribe.catalog.CatalogEvent;
-import com.genersoft.iot.vmp.gb28181.session.SSRCFactory;
+import com.genersoft.iot.vmp.gb28181.session.SendSsrcFactory;
 import com.genersoft.iot.vmp.media.event.hook.Hook;
 import com.genersoft.iot.vmp.media.event.hook.HookSubscribe;
 import com.genersoft.iot.vmp.media.event.hook.HookType;
@@ -44,7 +44,7 @@ public class RedisRpcServiceImpl implements IRedisRpcService {
     private HookSubscribe hookSubscribe;
 
     @Autowired
-    private SSRCFactory ssrcFactory;
+    private SendSsrcFactory sendSsrcFactory;
 
     @Autowired
     private RedisTemplate<String, Object> redisTemplate;
@@ -107,10 +107,8 @@ public class RedisRpcServiceImpl implements IRedisRpcService {
 
             // 读取redis中的上级点播信息，生成sendRtpItm发送出去
             if (sendRtpItem.getSsrc() == null) {
-                // 上级平台点播时不使用上级平台指定的ssrc，使用自定义的ssrc，参考国标文档-点播外域设备媒体流SSRC处理方式
+                sendRtpItem.setSsrc(sendSsrcFactory.getSendSsrc(
-                String ssrc = "Play".equalsIgnoreCase(sendRtpItem.getSessionName()) ? ssrcFactory.getPlaySsrc(hookData.getMediaServer().getId()) : ssrcFactory.getPlayBackSsrc(hookData.getMediaServer().getId());
+                        "Play".equalsIgnoreCase(sendRtpItem.getSessionName()) ? "0" : "1"));
-                sendRtpItem.setSsrc(ssrc);
-                sendRtpItem.setAllocatedSsrc(ssrc);
             }
             sendRtpItem.setMediaServerId(hookData.getMediaServer().getId());
             sendRtpItem.setLocalIp(hookData.getMediaServer().getSdpIp());

src/test/java/com/genersoft/iot/vmp/gb28181/session/SSRCFactoryTest.java

@@ -0,0 +1,176 @@
+package com.genersoft.iot.vmp.gb28181.session;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+import org.springframework.test.util.ReflectionTestUtils;
+
+import java.lang.reflect.Field;
+import java.util.HashSet;
+import java.util.Set;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class SSRCFactoryTest {
+
+    private SSRCFactory ssrcFactory;
+
+    private static final String DOMAIN_PART = "20000";
+    private static final String SERVER_ID = "test-server";
+
+    @BeforeEach
+    void setUp() throws Exception {
+        ssrcFactory = new SSRCFactory();
+        ReflectionTestUtils.setField(ssrcFactory, "domainPart", DOMAIN_PART);
+
+        Field schedulerField = SSRCFactory.class.getDeclaredField("scheduler");
+        schedulerField.setAccessible(true);
+        java.util.concurrent.ScheduledExecutorService scheduler =
+                (java.util.concurrent.ScheduledExecutorService) schedulerField.get(ssrcFactory);
+        scheduler.shutdownNow();
+    }
+
+    @Test
+    void getPlaySsrc_shouldReturnCorrectFormat() {
+        String ssrc = ssrcFactory.getPlaySsrc(SERVER_ID);
+        assertNotNull(ssrc);
+        assertEquals(10, ssrc.length(), "SSRC should be 10 characters: prefix(1) + domain(5) + seq(4)");
+        assertTrue(ssrc.startsWith("0"), "Play SSRC should start with '0'");
+        assertTrue(ssrc.substring(1).startsWith(DOMAIN_PART), "SSRC should contain domain part");
+        assertTrue(ssrc.matches("0" + DOMAIN_PART + "\\d{4}"), "SSRC format: 0" + DOMAIN_PART + "NNNN");
+    }
+
+    @Test
+    void getPlayBackSsrc_shouldReturnCorrectFormat() {
+        String ssrc = ssrcFactory.getPlayBackSsrc(SERVER_ID);
+        assertNotNull(ssrc);
+        assertEquals(10, ssrc.length(), "SSRC should be 10 characters: prefix(1) + domain(5) + seq(4)");
+        assertTrue(ssrc.startsWith("1"), "PlayBack SSRC should start with '1'");
+        assertTrue(ssrc.substring(1).startsWith(DOMAIN_PART), "SSRC should contain domain part");
+        assertTrue(ssrc.matches("1" + DOMAIN_PART + "\\d{4}"), "SSRC format: 1" + DOMAIN_PART + "NNNN");
+    }
+
+    @Test
+    void allocations_withinSameServer_shouldBeUnique() {
+        Set<String> allocated = new HashSet<>();
+        for (int i = 0; i < 1000; i++) {
+            String ssrc = ssrcFactory.getPlaySsrc(SERVER_ID);
+            assertNotNull(ssrc, "Should allocate SSRC #" + i);
+            assertTrue(allocated.add(ssrc), "SSRC should be unique: " + ssrc);
+        }
+        assertEquals(1000, allocated.size());
+    }
+
+    @Test
+    void allocations_forDifferentServers_shouldBeIndependent() {
+        String serverA = "server-a";
+        String serverB = "server-b";
+
+        for (int i = 0; i < 10000; i++) {
+            assertNotNull(ssrcFactory.getPlaySsrc(serverA), "Server A should allocate SSRC #" + i);
+        }
+        assertNull(ssrcFactory.getPlaySsrc(serverA), "Server A should be exhausted");
+
+        for (int i = 0; i < 1000; i++) {
+            assertNotNull(ssrcFactory.getPlaySsrc(serverB), "Server B should allocate SSRC #" + i);
+        }
+    }
+
+    @Test
+    void exhaustion_shouldReturnNull() {
+        for (int i = 0; i < 10000; i++) {
+            assertNotNull(ssrcFactory.getPlaySsrc(SERVER_ID), "iteration " + i);
+        }
+        assertNull(ssrcFactory.getPlaySsrc(SERVER_ID), "Should return null when exhausted");
+        assertNull(ssrcFactory.getPlayBackSsrc(SERVER_ID), "Should return null for PlayBack too");
+    }
+
+    @Test
+    @Disabled("Needs mocked mediaServerService for ZLM query")
+    void rebuild_shouldResetUsage() {
+        for (int i = 0; i < 500; i++) {
+            ssrcFactory.getPlaySsrc(SERVER_ID);
+        }
+        ssrcFactory.rebuild();
+
+        for (int i = 0; i < 500; i++) {
+            String ssrc = ssrcFactory.getPlaySsrc(SERVER_ID);
+            assertNotNull(ssrc, "After rebuild should allocate SSRC #" + i);
+        }
+    }
+
+    @Test
+    void allocateAll_shouldUseAll10000Slots() {
+        Set<String> allocated = new HashSet<>();
+        for (int i = 0; i < 10000; i++) {
+            String ssrc = ssrcFactory.getPlaySsrc(SERVER_ID);
+            assertNotNull(ssrc, "Should allocate at iteration " + i);
+            allocated.add(ssrc);
+        }
+        assertEquals(10000, allocated.size(), "All 10000 slots should be unique");
+    }
+
+    @Test
+    void twoPrefixes_shareSamePool() throws Exception {
+        for (int i = 0; i < 5000; i++) {
+            assertNotNull(ssrcFactory.getPlaySsrc(SERVER_ID), "play #" + i);
+            assertNotNull(ssrcFactory.getPlayBackSsrc(SERVER_ID), "playback #" + i);
+        }
+
+        Field usedMapField = SSRCFactory.class.getDeclaredField("usedMap");
+        usedMapField.setAccessible(true);
+        java.util.concurrent.ConcurrentHashMap<String, java.util.BitSet> usedMap =
+                (java.util.concurrent.ConcurrentHashMap<String, java.util.BitSet>) usedMapField.get(ssrcFactory);
+        java.util.BitSet bits = usedMap.get(SERVER_ID);
+        assertNotNull(bits);
+        assertEquals(10000, bits.cardinality(), "All 10000 bits should be set");
+    }
+
+    @Test
+    void multipleServers_shouldNotAffectEachOther() {
+        String server1 = "server-1";
+        String server2 = "server-2";
+        String server3 = "server-3";
+
+        for (int i = 0; i < 10000; i++) {
+            ssrcFactory.getPlaySsrc(server1);
+        }
+        assertNull(ssrcFactory.getPlaySsrc(server1));
+
+        assertNotNull(ssrcFactory.getPlaySsrc(server2));
+        assertNotNull(ssrcFactory.getPlaySsrc(server3));
+
+        for (int i = 0; i < 100; i++) {
+            ssrcFactory.getPlaySsrc(server2);
+            ssrcFactory.getPlaySsrc(server3);
+        }
+        assertNull(ssrcFactory.getPlaySsrc(server1));
+    }
+
+    @Test
+    void linearProbe_skipsUsedSlots() throws Exception {
+        Field usedMapField = SSRCFactory.class.getDeclaredField("usedMap");
+        usedMapField.setAccessible(true);
+        java.util.concurrent.ConcurrentHashMap<String, java.util.BitSet> usedMap =
+                (java.util.concurrent.ConcurrentHashMap<String, java.util.BitSet>) usedMapField.get(ssrcFactory);
+        java.util.BitSet bits = new java.util.BitSet(10000);
+        for (int i = 0; i < 100; i++) {
+            bits.set(i);
+        }
+        usedMap.put(SERVER_ID, bits);
+
+        String ssrc = ssrcFactory.getPlaySsrc(SERVER_ID);
+        assertNotNull(ssrc, "Should find a free slot via linear probe");
+        int suffix = Integer.parseInt(ssrc.substring(6));
+        assertTrue(suffix >= 100, "Should skip used slots 0-99, got suffix " + suffix);
+    }
+
+    @Test
+    void ssrc_shouldBeDifferentEachCall() {
+        Set<String> results = new HashSet<>();
+        for (int i = 0; i < 100; i++) {
+            results.add(ssrcFactory.getPlaySsrc(SERVER_ID));
+        }
+        assertEquals(100, results.size(), "All 100 calls should return different SSRCs");
+    }
+}