SrtReceiverSource for broadcasted stream

Implemented dedicated source, with UI for creation and saving appropriate settings.
Also updated info and imgui visitors accordingly

SrtReceiverSource.cpp

@@ -0,0 +1,56 @@
+
+#include "Log.h"
+#include "Decorations.h"
+#include "Visitor.h"
+
+#include "SrtReceiverSource.h"
+
+SrtReceiverSource::SrtReceiverSource(uint64_t id) : StreamSource(id)
+{
+    // create stream
+    stream_ = new Stream;
+
+    // set symbol
+    symbol_ = new Symbol(Symbol::SHARE, glm::vec3(0.75f, 0.75f, 0.01f));
+    symbol_->scale_.y = 1.5f;
+}
+
+
+void SrtReceiverSource::setConnection(const std::string &ip, const std::string &port)
+{
+    // TODO add check on wellformed IP and PORT
+    ip_ = ip;
+    port_ = port;
+    Log::Notify("Creating Source SRT receiving from '%s'", uri().c_str());
+
+    std::string description = "srtsrc uri=" + uri() + " ! tsdemux ! decodebin ! videoconvert";
+
+    // open gstreamer
+    stream_->open(description);
+    stream_->play(true);
+
+    // will be ready after init and one frame rendered
+    ready_ = false;
+}
+
+std::string SrtReceiverSource::uri() const
+{
+    return std::string("srt://") + ip_ + ":" + port_;
+}
+
+void SrtReceiverSource::accept(Visitor& v)
+{
+    Source::accept(v);
+    if (!failed())
+        v.visit(*this);
+}
+
+glm::ivec2 SrtReceiverSource::icon() const
+{
+    return glm::ivec2(ICON_SOURCE_SRT);
+}
+
+std::string SrtReceiverSource::info() const
+{
+    return std::string("SRT receiver from '") + uri() + "'";
+}