完善GB28181推流

src/Rtp/RtpProcess.h

@@ -27,9 +27,24 @@ public:
     typedef std::shared_ptr<RtpProcess> Ptr;
     RtpProcess(const string &stream_id);
     ~RtpProcess();
+
+    /**
+     * 输入rtp
+     * @param sock 本地监听的socket
+     * @param data rtp数据指针
+     * @param data_len rtp数据长度
+     * @param addr 数据源地址
+     * @param dts_out 解析出最新的dts
+     * @return 是否解析成功
+     */
     bool inputRtp(const Socket::Ptr &sock, const char *data,int data_len, const struct sockaddr *addr , uint32_t *dts_out = nullptr);
+
+    /**
+     * 是否超时，用于超时移除对象
+     */
     bool alive();
 
+    /// SockInfo override
     string get_local_ip() override;
     uint16_t get_local_port() override;
     string get_peer_ip() override;

src/Rtp/RtpSelector.cpp

@@ -15,20 +15,17 @@ namespace mediakit{
 
 INSTANCE_IMP(RtpSelector);
 
-bool RtpSelector::inputRtp(const Socket::Ptr &sock, string &stream_id, const char *data, int data_len,
+bool RtpSelector::inputRtp(const Socket::Ptr &sock, const char *data, int data_len,
                            const struct sockaddr *addr,uint32_t *dts_out) {
-    if (stream_id.empty()) {
-        //未指定流id，那么使用ssrc为流id
-        uint32_t ssrc = 0;
-        if (!getSSRC(data, data_len, ssrc)) {
-            WarnL << "get ssrc from rtp failed:" << data_len;
-            return false;
-        }
-        stream_id = printSSRC(ssrc);
+    //使用ssrc为流id
+    uint32_t ssrc = 0;
+    if (!getSSRC(data, data_len, ssrc)) {
+        WarnL << "get ssrc from rtp failed:" << data_len;
+        return false;
     }
 
     //假定指定了流id，那么通过流id来区分是否为一路流(哪怕可能同时收到多路流)
-    auto process = getProcess(stream_id, true);
+    auto process = getProcess(printSSRC(ssrc), true);
     if (process) {
         return process->inputRtp(sock, data, data_len, addr, dts_out);
     }

src/Rtp/RtpSelector.h

@@ -49,10 +49,31 @@ public:
     static bool getSSRC(const char *data,int data_len, uint32_t &ssrc);
     static RtpSelector &Instance();
 
-    bool inputRtp(const Socket::Ptr &sock, string &stream_id, const char *data, int data_len,
+    /**
+     * 输入多个rtp流，根据ssrc分流
+     * @param sock 本地socket
+     * @param data 收到的数据
+     * @param data_len 收到的数据长度
+     * @param addr rtp流源地址
+     * @param dts_out 解析出最新的dts
+     * @return 是否成功
+     */
+    bool inputRtp(const Socket::Ptr &sock, const char *data, int data_len,
                   const struct sockaddr *addr, uint32_t *dts_out = nullptr);
 
+    /**
+     * 获取一个rtp处理器
+     * @param stream_id 流id
+     * @param makeNew 不存在时是否新建
+     * @return rtp处理器
+     */
     RtpProcess::Ptr getProcess(const string &stream_id, bool makeNew);
+
+    /**
+     * 删除rtp处理器
+     * @param stream_id 流id
+     * @param ptr rtp处理器指针
+     */
     void delProcess(const string &stream_id, const RtpProcess *ptr);
 
 private:

src/Rtp/RtpServer.cpp

@@ -17,25 +17,20 @@ RtpServer::RtpServer() {
 }
 
 RtpServer::~RtpServer() {
-    if(_udp_server){
-        _udp_server->setOnRead(nullptr);
+    if(_on_clearup){
+        _on_clearup();
     }
 }
 
 void RtpServer::start(uint16_t local_port, const string &stream_id,  bool enable_tcp, const char *local_ip) {
     _udp_server.reset(new Socket(nullptr, false));
-    auto &ref = RtpSelector::Instance();
-    auto sock = _udp_server;
-    _udp_server->setOnRead([&ref, sock, stream_id](const Buffer::Ptr &buf, struct sockaddr *addr, int) {
-        ref.inputRtp(sock, const_cast<string &>(stream_id), buf->data(), buf->size(), addr);
-    });
-
     //创建udp服务器
     if (!_udp_server->bindUdpSock(local_port, local_ip)) {
         _udp_server = nullptr;
         string err = (StrPrinter << "bindUdpSock on " << local_ip << ":" << local_port << " failed:" << get_uv_errmsg(true));
         throw std::runtime_error(err);
     }
+
     //设置udp socket读缓存
     SockUtil::setRecvBuf(_udp_server->rawFD(), 4 * 1024 * 1024);
 
@@ -51,6 +46,31 @@ void RtpServer::start(uint16_t local_port, const string &stream_id,  bool enable
             throw;
         }
     }
+
+    auto sock = _udp_server;
+    RtpProcess::Ptr process;
+    if (!stream_id.empty()) {
+        //指定了流id，那么一个端口一个流(不管是否包含多个ssrc的多个流，绑定rtp源后，会筛选掉ip端口不匹配的流)
+        process = RtpSelector::Instance().getProcess(stream_id, true);
+        _udp_server->setOnRead([sock, process](const Buffer::Ptr &buf, struct sockaddr *addr, int) {
+            process->inputRtp(sock, buf->data(), buf->size(), addr);
+        });
+    } else {
+        //未指定流id，一个端口多个流，通过ssrc来分流
+        auto &ref = RtpSelector::Instance();
+        _udp_server->setOnRead([&ref, sock](const Buffer::Ptr &buf, struct sockaddr *addr, int) {
+            ref.inputRtp(sock, buf->data(), buf->size(), addr);
+        });
+    }
+
+    _on_clearup = [sock, process, stream_id]() {
+        //去除循环引用
+        sock->setOnRead(nullptr);
+        if (process) {
+            //删除rtp处理器
+            RtpSelector::Instance().delProcess(stream_id, process.get());
+        }
+    };
 }
 
 EventPoller::Ptr RtpServer::getPoller() {

src/Rtp/RtpServer.h

@@ -55,6 +55,7 @@ public:
 protected:
     Socket::Ptr _udp_server;
     TcpServer::Ptr _tcp_server;
+    function<void()> _on_clearup;
 };
 
 }//namespace mediakit

tests/test_rtp.cpp

@@ -38,7 +38,6 @@ static bool loadFile(const char *path){
     uint16_t len;
     char rtp[2 * 1024];
     struct sockaddr addr = {0};
-    string stream_id;
     while (true) {
         if (2 != fread(&len, 1, 2, fp)) {
             WarnL;
@@ -56,7 +55,7 @@ static bool loadFile(const char *path){
         }
 
         uint32_t timeStamp;
-        RtpSelector::Instance().inputRtp(nullptr, stream_id, rtp, len, &addr, &timeStamp);
+        RtpSelector::Instance().inputRtp(nullptr, rtp, len, &addr, &timeStamp);
         if(timeStamp_last){
             auto diff = timeStamp - timeStamp_last;
             if(diff > 0 && diff < 500){