mDNS Support (#1452)

* Allow build, if no grabbers are enabled

* Align available functions to right Qt version

* Update to next development version

* Align available functions to right Qt version

* fix workflows (apt/nightly)

* Disable QNetworkConfigurationManager deprecation warnings

* Initial go on Smart Pointers

* Add Deallocation

* Correct QT_WARNING_DISABLE_DEPRECATED (available since 5.9)

* Cluster Build Variables

* Hyperion Light

* Address build warnings

* Hyperion Light - UI

* Update Protobuf to latest master

* Removed compiler warnings

* Added restart ability to systray

* Correct Protobuf

* Ignore 'no-return' warning on protobuf build

* hyperion-remote: Fix auto discovery of hyperion server

* Fix Qt version override

* Update changelog

* Remove Grabber Components, if no Grabber exists

* Standalone Grabber - Fix fps default

* Remote Control - Have Source Selction accrosswhole screen

* Enable Blackborder detection only, if relevant input sources available

* Enable Blackborder detection only, if relevant input sources available

* Remote UI - rearrange containers

* Checkout

* Fix compilation on windows

* Re-added qmdnsengine template cmake

* chrono added for linux

* Removed existing AVAHI/Bonjour, allow to enable/disable mDNS

* hyperiond macos typo fix

* Fix macOS Bundle build

* Fix macOS bundle info details

* Correct CMake files

* Removed existing AVAHI/Bonjour (2)

* Share hyperion's services via mDNS

* Add mDNS Browser and mDNS for LED-Devices

* Support mDNS discovery for standalone grabbers

* Remove ZLib Dependency & Cleanup

* mDNS - hanle 2.local2 an ".local." domains equally

* Hue - Link discovery to bridge class, workaround port 443 for mDNS discovery

* Fix save button state when switching between devices

* Removed sessions (of other hyperions)

* mDNS Publisher - Simplify service naming

* mDNS refactoring & Forwarder discovery

* mDNS Updates to use device service name

* Consistency of standalone grabbers with mDNS Service Registry

* Merge branch 'hyperion-project:master' into mDNS

* Start JSON and WebServers only after Instance 0 is available

* Remove bespoke qDebug Output again

* MDNS updates and refactor Forwarder

* Minor updates

* Upgrade to CMake 3.1

* typo

* macOS fix

* Correct merge

* - Remove dynamic linker flag from standalone dispmanX Grabber
- Added ability to use system qmdns libs

* Cec handler library will load at runtime

* typo fix

* protobuf changes

* mDNS changes for Windows/macOS

* test window build qmdnsengine

* absolute path to protobuf cmake dir

* Rework Hue Wizard supporting mDNS

* LED-Devices - Retry support + Refactoring (excl. Hue)

* LED-Devices - Refactoring/Retry support Hue + additional alignments

* Address LGTM findings

* Fix CI-Build, revert test changes

* Build Windows in Release mode to avoid python problem

* Correct that WebServerObject is available earlier

* Ensure that instance name in logs for one instance are presented

* Update content LEDs

* Rework mDNS Address lookup

* Fix LED UI

* Fix for non mDNS Services (ignore default port)

* Disbale device when now input is available

* Revert back some updates, ensure last color is updated when switched on

* Handle reopening case and changed IP, port for API-calls

* Add UPD-DDP Device

* WLED support for DDP

* Fix printout

* LEDDevice - Allow more retries, udapte defaults

* LED-Net Devices - Select Custom device, if configured

Co-authored-by: Paulchen Panther <16664240+Paulchen-Panther@users.noreply.github.com>
Co-authored-by: Paulchen Panther <Paulchen-Panter@protonmail.com>

libsrc/api/API.cpp

@@ -14,6 +14,7 @@
 #include <QBuffer>
 #include <QByteArray>
 #include <QTimer>
+#include <QThread>
 
 // hyperion includes
 #include <utils/jsonschema/QJsonFactory.h>
@@ -23,9 +24,6 @@
 #include <utils/ColorSys.h>
 #include <utils/Process.h>
 
-// bonjour wrapper
-#include <bonjour/bonjourbrowserwrapper.h>
-
 // ledmapping int <> string transform methods
 #include <hyperion/ImageProcessor.h>
 
@@ -44,17 +42,13 @@ API::API(Logger *log, bool localConnection, QObject *parent)
     // Init
     _log = log;
     _authManager = AuthManager::getInstance();
-    _instanceManager = HyperionIManager::getInstance();
+	_instanceManager = HyperionIManager::getInstance();
     _localConnection = localConnection;
 
     _authorized = false;
     _adminAuthorized = false;
 
-    _hyperion = _instanceManager->getHyperionInstance(0);
     _currInstanceIndex = 0;
-    // TODO FIXME
-    // report back current registers when a Hyperion instance request it
-    //connect(ApiSync::getInstance(), &ApiSync::requestActiveRegister, this, &API::requestActiveRegister, Qt::QueuedConnection);
 
     // connect to possible token responses that has been requested
     connect(_authManager, &AuthManager::tokenResponse, [=] (bool success, QObject *caller, const QString &token, const QString &comment, const QString &id, const int &tan)
@@ -73,7 +67,7 @@ API::API(Logger *log, bool localConnection, QObject *parent)
 
 void API::init()
 {
-	assert(_hyperion);
+	_hyperion = _instanceManager->getHyperionInstance(0);
 
     bool apiAuthRequired = _authManager->isAuthRequired();
 
@@ -336,13 +330,6 @@ void API::stopInstance(quint8 index)
     QMetaObject::invokeMethod(_instanceManager, "stopInstance", Qt::QueuedConnection, Q_ARG(quint8, index));
 }
 
-void API::requestActiveRegister(QObject *callerInstance)
-{
-    // TODO FIXME
-    //if (_activeRegisters.size())
-    //   QMetaObject::invokeMethod(ApiSync::getInstance(), "answerActiveRegister", Qt::QueuedConnection, Q_ARG(QObject *, callerInstance), Q_ARG(MapRegister, _activeRegisters));
-}
-
 bool API::deleteInstance(quint8 index, QString &replyMsg)
 {
     if (_adminAuthorized)