+#ifndef _MOVIT_GAMMA_EXPANSION_EFFECT_H
+#define _MOVIT_GAMMA_EXPANSION_EFFECT_H 1
+
+// An effect to convert the given gamma curve into linear light,
+// typically inserted by the framework automatically at the beginning
+// of the processing chain.
+//
+// Currently supports sRGB and Rec. 601/709.
+
+#include <string>