Compute LUTs at run-time.dynamic-lut

1 files changed, 28 insertions, 0 deletions

diff --git a/src/lut_cache.h b/src/lut_cache.h
new file mode 100644
index 00000000..b60ee109
--- /dev/null
+++ b/src/lut_cache.h
@@ -0,0 +1,28 @@
+#ifndef LIBDCP_LUT_CACHE_H
+#define LIBDCP_LUT_CACHE_H
+
+#include <list>
+#include <boost/shared_ptr.hpp>
+
+template<class T>
+class LUTCache
+{
+public:
+	boost::shared_ptr<T> get (int bit_depth, float gamma)
+	{
+		for (typename std::list<boost::shared_ptr<T> >::iterator i = _cache.begin(); i != _cache.end(); ++i) {
+			if ((*i)->bit_depth() == bit_depth && (*i)->gamma() == gamma) {
+				return *i;
+			}
+		}
+
+		boost::shared_ptr<T> lut (new T (bit_depth, gamma));
+		_cache.push_back (lut);
+		return lut;
+	}
+
+private:
+	std::list<boost::shared_ptr<T> > _cache;
+};
+
+#endif