Added video standards to JsonAPI output

include/utils/VideoStandard.h

@@ -0,0 +1,46 @@
+#pragma once
+
+#include <QString>
+
+/**
+ * Enumeration of the possible video standards the grabber can be set to
+ */
+enum class VideoStandard {
+	PAL,
+	NTSC,
+	SECAM,
+	NO_CHANGE
+};
+
+inline VideoStandard parseVideoStandard(const QString& videoStandard)
+{
+	// convert to lower case
+	QString standard = videoStandard.toUpper();
+
+	if (standard == "PAL")
+	{
+		return VideoStandard::PAL;
+	}
+	else if (standard == "NTSC")
+	{
+		return VideoStandard::NTSC;
+	}
+	else if (standard == "SECAM")
+	{
+		return VideoStandard::SECAM;
+	}
+
+	// return the default NO_CHANGE
+	return VideoStandard::NO_CHANGE;
+}
+
+inline QString VideoStandard2String(VideoStandard videoStandard)
+{
+	switch (videoStandard)
+	{
+		case VideoStandard::PAL: return "PAL";
+		case VideoStandard::NTSC: return "NTSC";
+		case VideoStandard::SECAM: return "SECAM";
+		default: return "NO_CHANGE";
+	}
+}