eventhandler: Add InputSettingsChanged

Fired when an input's settings change, like via the properties dialog
or via `SetInputSettings`.

Closes #1157

src/eventhandler/EventHandler.cpp

@@ -31,6 +31,7 @@ EventHandler::EventHandler()
 		signal_handler_connect(coreSignalHandler, "source_destroy", SourceDestroyedMultiHandler, this);
 		signal_handler_connect(coreSignalHandler, "source_remove", SourceRemovedMultiHandler, this);
 		signal_handler_connect(coreSignalHandler, "source_rename", SourceRenamedMultiHandler, this);
+		signal_handler_connect(coreSignalHandler, "source_update", SourceUpdatedMultiHandler, this);
 	} else {
 		blog(LOG_ERROR, "[EventHandler::EventHandler] Unable to get libobs signal handler!");
 	}
@@ -50,6 +51,7 @@ EventHandler::~EventHandler()
 		signal_handler_disconnect(coreSignalHandler, "source_destroy", SourceDestroyedMultiHandler, this);
 		signal_handler_disconnect(coreSignalHandler, "source_remove", SourceRemovedMultiHandler, this);
 		signal_handler_disconnect(coreSignalHandler, "source_rename", SourceRenamedMultiHandler, this);
+		signal_handler_disconnect(coreSignalHandler, "source_update", SourceUpdatedMultiHandler, this);
 	} else {
 		blog(LOG_ERROR, "[EventHandler::~EventHandler] Unable to get libobs signal handler!");
 	}
@@ -588,6 +590,23 @@ void EventHandler::SourceRenamedMultiHandler(void *param, calldata_t *data)
 	}
 }
 
+void EventHandler::SourceUpdatedMultiHandler(void *param, calldata_t *data)
+{
+	auto eventHandler = static_cast<EventHandler *>(param);
+
+	obs_source_t *source = GetCalldataPointer<obs_source_t>(data, "source");
+	if (!source)
+		return;
+
+	switch (obs_source_get_type(source)) {
+	case OBS_SOURCE_TYPE_INPUT:
+		eventHandler->HandleInputSettingsChanged(source);
+		break;
+	default:
+		break;
+	}
+}
+
 void EventHandler::StreamOutputReconnectHandler(void *param, calldata_t *)
 {
 	auto eventHandler = static_cast<EventHandler *>(param);

src/eventhandler/EventHandler.h

@@ -69,9 +69,10 @@ private:
 	static void SourceCreatedMultiHandler(void *param, calldata_t *data);
 	static void SourceDestroyedMultiHandler(void *param, calldata_t *data);
 	static void SourceRemovedMultiHandler(void *param, calldata_t *data);
-
-	// Signal handler: source
 	static void SourceRenamedMultiHandler(void *param, calldata_t *data);
+	static void SourceUpdatedMultiHandler(void *param, calldata_t *data);
+
+	// Signal handler: media sources
 	static void SourceMediaPauseMultiHandler(void *param, calldata_t *data);
 	static void SourceMediaPlayMultiHandler(void *param, calldata_t *data);
 	static void SourceMediaRestartMultiHandler(void *param, calldata_t *data);
@@ -106,7 +107,7 @@ private:
 	void HandleInputCreated(obs_source_t *source);
 	void HandleInputRemoved(obs_source_t *source);
 	void HandleInputNameChanged(obs_source_t *source, std::string oldInputName, std::string inputName);
-	void HandleInputVolumeMeters(std::vector<json> inputs); // AudioMeter::Handler callback
+	void HandleInputSettingsChanged(obs_source_t *source);
 	static void HandleInputActiveStateChanged(void *param,
 						  calldata_t *data); // Direct callback
 	static void HandleInputShowStateChanged(void *param,
@@ -123,6 +124,7 @@ private:
 						  calldata_t *data); // Direct callback
 	static void HandleInputAudioMonitorTypeChanged(void *param,
 						       calldata_t *data); // Direct callback
+	void HandleInputVolumeMeters(std::vector<json> inputs); // AudioMeter::Handler callback
 
 	// Transitions
 	void HandleCurrentSceneTransitionChanged();

src/eventhandler/EventHandler_Inputs.cpp

@@ -93,6 +93,32 @@ void EventHandler::HandleInputNameChanged(obs_source_t *, std::string oldInputNa
 	BroadcastEvent(EventSubscription::Inputs, "InputNameChanged", eventData);
 }
 
+/**
+ * An input's settings have changed (been updated).
+ *
+ * Note: On some inputs, changing values in the properties dialog will cause an immediate update. Pressing the "Cancel" button will revert the settings, resulting in another event being fired.
+ *
+ * @dataField inputName     | String | Name of the input
+ * @dataField inputSettings | Object | New settings object of the input
+ *
+ * @eventType InputSettingsChanged
+ * @eventSubscription Inputs
+ * @complexity 3
+ * @rpcVersion -1
+ * @initialVersion 5.4.0
+ * @api events
+ * @category inputs
+ */
+void EventHandler::HandleInputSettingsChanged(obs_source_t *source)
+{
+	OBSDataAutoRelease inputSettings = obs_source_get_settings(source);
+
+	json eventData;
+	eventData["inputName"] = obs_source_get_name(source);
+	eventData["inputSettings"] = Utils::Json::ObsDataToJson(inputSettings);
+	BroadcastEvent(EventSubscription::Inputs, "InputSettingsChanged", eventData);
+}
+
 /**
  * An input's active state has changed.
  *