Add support for inline scripts

* Script can be defined in the macro segment or loaded from a file
* Supports both LUA and Python
* Can be used for actions and conditions
* obs_script_create and obs_script_destroy are resolved at runtime
  (Let's hope the API remains stable)

plugins/scripting/utils/obs-script-helpers.cpp

@@ -0,0 +1,72 @@
+#include "obs-script-helpers.hpp"
+#include "log-helper.hpp"
+
+#include <QFileInfo>
+#include <QLibrary>
+
+namespace advss {
+
+static const char *libName =
+#if defined(WIN32)
+	"obs-scripting.dll";
+#elif __APPLE__
+	"obs-scripting.dylib";
+#else
+	"obs-scripting.so";
+#endif
+
+typedef obs_script_t *(*obs_script_create_t)(const char *, obs_data_t *);
+typedef void (*obs_script_destroy_t)(obs_script_t *);
+
+obs_script_create_t obs_script_create = nullptr;
+obs_script_destroy_t obs_script_destroy = nullptr;
+
+static bool setup()
+{
+	QLibrary scriptingLib(libName);
+
+	obs_script_create =
+		(obs_script_create_t)scriptingLib.resolve("obs_script_create");
+	if (!obs_script_create) {
+		blog(LOG_WARNING,
+		     "could not resolve obs_script_create symbol!");
+	}
+
+	obs_script_destroy = (obs_script_destroy_t)scriptingLib.resolve(
+		"obs_script_destroy");
+	if (!obs_script_destroy) {
+		blog(LOG_WARNING,
+		     "could not resolve obs_script_destroy symbol!");
+	}
+
+	return true;
+}
+static bool setupDone = setup();
+
+obs_script_t *CreateOBSScript(const char *path, obs_data_t *settings)
+{
+	if (!obs_script_create) {
+		return nullptr;
+	}
+	return obs_script_create(path, settings);
+}
+
+void DestroyOBSScript(obs_script_t *script)
+{
+	if (!obs_script_destroy) {
+		return;
+	}
+	obs_script_destroy(script);
+}
+
+std::string GetLUACompatiblePath(const std::string &path)
+{
+	// Can't use settingsFile here as LUA will complain if Windows style
+	// paths (C:\some\path) are used.
+	// QFileInfo::absoluteFilePath will convert those paths so LUA won't
+	// complain. (C:/some/path)
+	const QFileInfo fileInfo(QString::fromStdString(path));
+	return fileInfo.absoluteFilePath().toStdString();
+}
+
+} // namespace advss