-#ifndef _D65_H
-#define _D65_H 1
+#ifndef _MOVIT_D65_H
+#define _MOVIT_D65_H 1
+
+namespace movit {
// The D65 illuminant, which is the standard white point (ie. what you should get
// for R=G=B=1) for almost all video color spaces in common use. It has a color
static const double d65_Y = 1.0;
static const double d65_Z = d65_z / d65_y;
-#endif // !defined(_D65_H)
+} // namespace movit
+
+#endif // !defined(_MOVIT_D65_H)