Add option to press buttons in the properties dialog of filters

plugins/base/utils/source-properties-button.hpp

@@ -0,0 +1,25 @@
+#pragma once
+#include <obs.hpp>
+#include <QComboBox>
+#include <qmetatype.h>
+#include <string>
+#include <vector>
+
+namespace advss {
+
+struct SourceSettingButton {
+	bool Save(obs_data_t *obj) const;
+	bool Load(obs_data_t *obj);
+	std::string ToString() const;
+
+	std::string id = "";
+	std::string description = "";
+};
+
+std::vector<SourceSettingButton> GetSourceButtons(OBSWeakSource source);
+void PressSourceButton(const SourceSettingButton &button, obs_source_t *source);
+void PopulateSourceButtonSelection(QComboBox *list, OBSWeakSource source);
+
+} // namespace advss
+
+Q_DECLARE_METATYPE(advss::SourceSettingButton);