BugFix Shmdata sink broadcasting Shared Memory

Fix termination of shmdatasink, improved UI and doc.

README.md

@@ -127,9 +127,16 @@ Optionnal:
 
     apt-get install libglm-dev libstb-dev libtinyxml2-dev ableton-link-dev 
     
-+ Follow the instructions to [install Shmdata](https://gitlab.com/sat-mtl/tools/shmdata).
++ Follow the instructions to [install Shmdata](https://github.com/nicobou/shmdata/blob/develop/doc/install-from-sources.md).
+
+    git clone https://gitlab.com/sat-metalab/shmdata.git
+    mkdir shmdata-build
+    cd shmdata-build
+    cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr -DCMAKE_BUILD_TYPE=Release -DWITH_PYTHON=0 -DWITH_SDCRASH=0 -DWITH_SDFLOW=0 ../shmdata-build
+    cmake --build . --target package
+    sudo dpkg -i ./libshmdata_1.3*_amd64.deb
 
 #### OSX with Brew
 
-    ~$ brew install cmake libpng glfw gstreamer icu4c
+    brew install cmake libpng glfw gstreamer icu4c
 

src/Settings.cpp

@@ -142,6 +142,7 @@ void Settings::Save(uint64_t runtime, const std::string &filename)
     applicationNode->SetAttribute("broadcast_port", application.broadcast_port);
     applicationNode->SetAttribute("loopback_camera", application.loopback_camera);
     applicationNode->SetAttribute("shm_socket_path", application.shm_socket_path.c_str());
+    applicationNode->SetAttribute("shm_method", application.shm_method);
     applicationNode->SetAttribute("accept_audio", application.accept_audio);
     pRoot->InsertEndChild(applicationNode);
 
@@ -462,6 +463,7 @@ void Settings::Load(const string &filename)
             applicationNode->QueryIntAttribute("broadcast_port", &application.broadcast_port);
             applicationNode->QueryIntAttribute("loopback_camera", &application.loopback_camera);
             applicationNode->QueryBoolAttribute("accept_audio", &application.accept_audio);
+            applicationNode->QueryIntAttribute("shm_method", &application.shm_method);
 
             // text attributes
             const char *tmpstr = applicationNode->Attribute("shm_socket_path");

src/ShmdataBroadcast.cpp

@@ -169,6 +169,9 @@ std::string ShmdataBroadcast::init(GstCaps *caps)
 
 void ShmdataBroadcast::terminate()
 {
+    // end src
+    gst_app_src_end_of_stream (src_);
+
     // force finished
     endofstream_ = true;
     active_ = false;
@@ -188,9 +191,9 @@ std::string ShmdataBroadcast::gst_pipeline() const
     pipeline += (method_ == SHM_SHMDATASINK) ? "shmdatasrc" : "shmsrc";
     pipeline += " socket-path=";
     pipeline += socket_path_;
-    pipeline += " is-live=true";
 
     if (method_ == SHM_SHMSINK){
+        pipeline += " is-live=true";
         pipeline += " ! ";
         pipeline += std::string( gst_caps_to_string(caps_) );
         pipeline = std::regex_replace(pipeline, std::regex("\\(int\\)"), "");

src/UserInterfaceManager.cpp

@@ -5772,14 +5772,14 @@ void Navigator::RenderMainPannelSettings()
             ImFormatString(msg, IM_ARRAYSIZE(msg), "Shared Memory\n\n"
                                                    "vimix can share to RAM with "
                                                    "gstreamer default 'shmsink' "
-                                                   "and with 'shmdatasink'.\n"
+                                                   "and with 'shmdatasink'.\n\n"
                                                    "Socket file to connect to:\n%s\n",
                            _shm_socket_file.c_str());
         }
         else {
             ImFormatString(msg, IM_ARRAYSIZE(msg), "Shared Memory\n\n"
                                                    "vimix can share to RAM with "
-                                                   "gstreamer 'shmsink'.\n"
+                                                   "gstreamer 'shmsink'.\n\n"
                                                    "Socket file to connect to:\n%s\n",
                            _shm_socket_file.c_str());
         }
@@ -5787,9 +5787,9 @@ void Navigator::RenderMainPannelSettings()
         ImGui::SameLine(0);
         ImGui::SetCursorPosX(width_);
         ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
-        char bufsocket[64] = "";
+        char bufsocket[128] = "";
-        snprintf(bufsocket, 64, "%s", Settings::application.shm_socket_path.c_str());
+        snprintf(bufsocket, 128, "%s", Settings::application.shm_socket_path.c_str());
-        ImGui::InputTextWithHint("##SHM path", SystemToolkit::home_path().c_str(), bufsocket, 64);
+        ImGui::InputTextWithHint("##SHM path", SystemToolkit::home_path().c_str(), bufsocket, 128);
         if (ImGui::IsItemDeactivatedAfterEdit()) {
             Settings::application.shm_socket_path = bufsocket;
         }
@@ -5799,7 +5799,7 @@ void Navigator::RenderMainPannelSettings()
         if (ShmdataBroadcast::available(ShmdataBroadcast::SHM_SHMDATASINK)) {
             ImGui::SetCursorPosX(width_);
             ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
-            ImGui::Combo("SHM plugin", &Settings::application.shm_method, "shmsink\0shmdatasink\0");
+            ImGui::Combo("SHM sink", &Settings::application.shm_method, "shmsink\0shmdatasink\0");
         }
     }