00001 /* This file is part of Raul. 00002 * Copyright (C) 2007-2009 Dave Robillard <http://drobilla.net> 00003 * 00004 * Raul is free software; you can redistribute it and/or modify it under the 00005 * terms of the GNU General Public License as published by the Free Software 00006 * Foundation; either version 2 of the License, or (at your option) any later 00007 * version. 00008 * 00009 * Raul is distributed in the hope that it will be useful, but WITHOUT ANY 00010 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 00011 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for details. 00012 * 00013 * You should have received a copy of the GNU General Public License along 00014 * with this program; if not, write to the Free Software Foundation, Inc., 00015 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 00016 */ 00017 00018 #ifndef RAUL_QUANTIZER_HPP 00019 #define RAUL_QUANTIZER_HPP 00020 00021 #include <cmath> 00022 #include "raul/TimeStamp.hpp" 00023 00024 namespace Raul { 00025 00026 00027 class Quantizer { 00028 public: 00029 inline static TimeStamp quantize(TimeStamp q, TimeStamp t) { 00030 assert(q.unit() == t.unit()); 00031 // FIXME: Precision problem? Should probably stay in discrete domain 00032 const double qd = q.to_double(); 00033 const double td = t.to_double(); 00034 return TimeStamp(t.unit(), (qd > 0) ? lrint(td / qd) * qd : td); 00035 } 00036 00037 inline static double quantize(double q, double t) { 00038 return (q > 0) 00039 ? lrint(t / q) * q 00040 : t; 00041 } 00042 }; 00043 00044 00045 } // namespace Raul 00046 00047 #endif // RAUL_QUANTIZER_HPP