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/*
cw_binaural~: a binaural synthesis external for pure data
by David Doukhan - david.doukhan@gmail.com - http://perso.limsi.fr/doukhan
and Anne Sedes - sedes.anne@gmail.com
Copyright (C) 2009-2011 David Doukhan and Anne Sedes
For more details, see CW_binaural~, a binaural synthesis external for Pure Data
David Doukhan and Anne Sedes, PDCON09
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef FLYWEIGHT_IR_FACTORY_HPP_
# define FLYWEIGHT_IR_FACTORY_HPP_
# include <map>
# include "ir_key.hpp"
# include "hrtfcont.hpp"
# include "itdcont.hpp"
// This class is a mixed flyweight and factory approach
// aimed to obtain the requested impulse response
class FlyweightIrFactory
{
public:
// there should be only one flyweightfactory
// so we use a singleton design pattern
static FlyweightIrFactory* instance();
// get a hrtf set container corresponding
// to a given set of parameters
HrtfCont* hrtf_set_get(const ir_key& k);
// get a set of itd corresponding to a given set of parameters
ItdCont* itd_set_get(ir_key k);
private:
// check if a given key is consistent
bool is_hrtf_set_key_consistent(const ir_key& k);
// tells if a number is a power of 2
bool ispowerof2(size_t n);
// All Hrtf sets will be stored in a hash map
// indexed by the requested preprocessing options
// on the hrtf set
map<ir_key, HrtfCont*, ir_key_isless> _hrtf_db;
// a separate map is used for ITD computations
// on a longer term, it will allow to compute itd using
// different methods
map<ir_key, ItdCont*, ir_key_isless> _itd_db;
FlyweightIrFactory() {}
static FlyweightIrFactory* _instance;
};
#endif
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