解决开启rtp推流鉴权导致udp丢包的问题，提升GB28181推流秒开体验

src/Rtp/RtpProcess.cpp

@@ -78,11 +78,6 @@ bool RtpProcess::inputRtp(bool is_udp, const Socket::Ptr &sock, const char *data
         emitOnPublish();
     }
 
-    if (!_muxer) {
-        //无权限推流
-        return false;
-    }
-
     _total_bytes += len;
     if (_save_file_rtp) {
         uint16_t size = (uint16_t)len;
@@ -95,7 +90,7 @@ bool RtpProcess::inputRtp(bool is_udp, const Socket::Ptr &sock, const char *data
     }
 
     GET_CONFIG(string, dump_dir, RtpProxy::kDumpDir);
-    if (!_muxer->isEnabled() && !dts_out && dump_dir.empty()) {
+    if (_muxer && !_muxer->isEnabled() && !dts_out && dump_dir.empty()) {
         //无人访问、且不取时间戳、不导出调试文件时，我们可以直接丢弃数据
         _last_frame_time.resetTime();
         return false;
@@ -109,20 +104,55 @@ bool RtpProcess::inputRtp(bool is_udp, const Socket::Ptr &sock, const char *data
 }
 
 void RtpProcess::inputFrame(const Frame::Ptr &frame) {
-    _last_frame_time.resetTime();
     _dts = frame->dts();
     if (_save_file_video && frame->getTrackType() == TrackVideo) {
         fwrite((uint8_t *) frame->data(), frame->size(), 1, _save_file_video.get());
     }
-    _muxer->inputFrame(frame);
+    if (_muxer) {
+        _last_frame_time.resetTime();
+        _muxer->inputFrame(frame);
+    } else {
+        if (_cached_func.size() > 100) {
+            WarnL << "cached frame of track(" << frame->getCodecName() << ") is too much, now droped";
+            return;
+        }
+        auto frame_cached = Frame::getCacheAbleFrame(frame);
+        lock_guard<recursive_mutex> lck(_func_mtx);
+        _cached_func.emplace_back([this, frame_cached]() {
+            _last_frame_time.resetTime();
+            _muxer->inputFrame(frame_cached);
+        });
+    }
 }
 
 void RtpProcess::addTrack(const Track::Ptr &track) {
-    _muxer->addTrack(track);
+    if (_muxer) {
+        _muxer->addTrack(track);
+    } else {
+        lock_guard<recursive_mutex> lck(_func_mtx);
+        _cached_func.emplace_back([this, track]() {
+            _muxer->addTrack(track);
+        });
+    }
 }
 
 void RtpProcess::addTrackCompleted() {
-    _muxer->addTrackCompleted();
+    if (_muxer) {
+        _muxer->addTrackCompleted();
+    } else {
+        lock_guard<recursive_mutex> lck(_func_mtx);
+        _cached_func.emplace_back([this]() {
+            _muxer->addTrackCompleted();
+        });
+    }
+}
+
+void RtpProcess::doCachedFunc() {
+    lock_guard<recursive_mutex> lck(_func_mtx);
+    for (auto &func : _cached_func) {
+        func();
+    }
+    _cached_func.clear();
 }
 
 bool RtpProcess::alive() {
@@ -197,19 +227,20 @@ void RtpProcess::setListener(const std::weak_ptr<MediaSourceEvent> &listener) {
 void RtpProcess::emitOnPublish() {
     weak_ptr<RtpProcess> weak_self = shared_from_this();
     Broadcast::PublishAuthInvoker invoker = [weak_self](const string &err, bool enableHls, bool enableMP4) {
-        auto strongSelf = weak_self.lock();
-        if (!strongSelf) {
+        auto strong_self = weak_self.lock();
+        if (!strong_self) {
             return;
         }
         if (err.empty()) {
-            strongSelf->_muxer = std::make_shared<MultiMediaSourceMuxer>(strongSelf->_media_info._vhost,
-                                                                         strongSelf->_media_info._app,
-                                                                         strongSelf->_media_info._streamid, 0.0f,
+            strong_self->_muxer = std::make_shared<MultiMediaSourceMuxer>(strong_self->_media_info._vhost,
+                                                                         strong_self->_media_info._app,
+                                                                         strong_self->_media_info._streamid, 0.0f,
                                                                          true, true, enableHls, enableMP4);
-            strongSelf->_muxer->setMediaListener(strongSelf);
-            InfoP(strongSelf) << "允许RTP推流";
+            strong_self->_muxer->setMediaListener(strong_self);
+            strong_self->doCachedFunc();
+            InfoP(strong_self) << "允许RTP推流";
         } else {
-            WarnP(strongSelf) << "禁止RTP推流:" << err;
+            WarnP(strong_self) << "禁止RTP推流:" << err;
         }
     };
 

src/Rtp/RtpProcess.h

@@ -79,6 +79,7 @@ protected:
 
 private:
     void emitOnPublish();
+    void doCachedFunc();
 
 private:
     uint32_t _dts = 0;
@@ -95,6 +96,8 @@ private:
     atomic_bool _stop_rtp_check{false};
     atomic_flag _busy_flag{false};
     Ticker _last_check_alive;
+    recursive_mutex _func_mtx;
+    deque<function<void()> > _cached_func;
 };
 
 }//namespace mediakit