1 files changed, 46 insertions, 0 deletions
diff --git a/src/transfer_function.cc b/src/transfer_function.cc
new file mode 100644
index 00000000..2c7e3e52
--- /dev/null
+++ b/src/transfer_function.cc
@@ -0,0 +1,46 @@
+/*
+    Copyright (C) 2012-2014 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.
+
+*/
+
+#include "transfer_function.h"
+#include <cmath>
+
+using std::pow;
+using std::map;
+using namespace dcp;
+
+TransferFunction::~TransferFunction ()
+{
+	for (map<int, float*>::const_iterator i = _luts.begin(); i != _luts.end(); ++i) {
+		delete[] i->second;
+	}
+
+	_luts.clear ();
+}
+
+float const *
+TransferFunction::lut (int bit_depth) const
+{
+	map<int, float*>::const_iterator i = _luts.find (bit_depth);
+	if (i != _luts.end ()) {
+		return i->second;
+	}
+
+	_luts[bit_depth] = make_lut (bit_depth);
+	return _luts[bit_depth];
+}