Compute LUTs at run-time.dynamic-lut

1 files changed, 63 insertions, 0 deletions

diff --git a/src/lut.h b/src/lut.h
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+/*
+    Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef LIBDCP_LUT_H
+#define LIBDCP_LUT_H
+
+#include <cmath>
+
+namespace libdcp {
+
+template<typename T>
+class LUT
+{
+public:
+	LUT(int bit_depth, float gamma)
+		: _lut(0)
+		, _bit_depth (bit_depth)
+		, _gamma (gamma)
+	{
+		_lut = new T[int(std::pow(2, _bit_depth))];
+	}
+
+	virtual ~LUT() {
+		delete[] _lut;
+	}
+	
+	T const * lut() const {
+		return _lut;
+	}
+
+	int bit_depth () const {
+		return _bit_depth;
+	}
+
+	float gamma () const {
+		return _gamma;
+	}
+
+protected:
+	T* _lut;
+	int _bit_depth;
+	float _gamma;
+};
+
+}
+
+#endif