1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
/*
cw_binaural~: a binaural synthesis external for pure data
by David Doukhan - david.doukhan@gmail.com - http://www.limsi.fr/Individu/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/>.
*/
#include "flyweight_ir_factory.hpp"
#include "logstring.hpp"
#include "raw_wav_hrtfcont.hpp"
#include "unprocessed_fixed_size_hrtfcont.hpp"
#include "spectral_hrtfcont.hpp"
#include "minphase_hrtfcont.hpp"
FlyweightIrFactory* FlyweightIrFactory::_instance = NULL;
FlyweightIrFactory* FlyweightIrFactory::instance()
{
//slog << "flyw instance" << endl;
if (!_instance)
_instance = new FlyweightIrFactory();
return _instance;
}
HrtfCont* FlyweightIrFactory::hrtf_set_get(const ir_key& k)
{
//slog << "calling the factory" << endl;
// if the key is in the map, then it is valid, and an be returned as it
if (_hrtf_db.find(k) != _hrtf_db.end())
return _hrtf_db[k];
// slog << "key not in database, creating new db" << endl;
// check that the key is valid
if (!is_hrtf_set_key_consistent(k))
{
slog << "key not consistent" << endl;
return NULL;
}
// By convention, length == 0 means
// getting the unprocessed hrtf at its original size
if (!k.length)
return (_hrtf_db[k] = new RawWavHrtfCont(k));
// spectral representation of the filter database
// to be used in overlap-add
if (k.spectral)
return (_hrtf_db[k] = new SpectralHrtfCont(k));
// minmum phase filter
if (k.minp_ap_dec)
return (_hrtf_db[k] = new MinPhaseHrtfCont(k));
// Unprocessed impulse response of fixed size
// this test is useless
if (!k.minp_ap_dec && !k.spectral)
return (_hrtf_db[k] = new UnprocessedFixedSizeHrtfCont(k));
//slog << "returb null" << endl;
return NULL;
}
bool FlyweightIrFactory::is_hrtf_set_key_consistent(const ir_key& k)
{
if (!k.path.length() || !k.iir_regex.length())
return false;
if (!k.length && (k.minp_ap_dec || k.spectral))
return false;
if ((k.minp_ap_dec || k.spectral) && !ispowerof2(k.length))
{
slog << "For spectral filtering or for minphase decompostion, "
<< "the impulse response size should be a power of 2" << endl;
return false;
}
return true;
}
bool FlyweightIrFactory::ispowerof2(size_t n)
{
return (n > 0) && !(n & (n - 1));
}
ItdCont* FlyweightIrFactory::itd_set_get(ir_key k)
{
// if no minphase/allpass decomposition has been done
// then, we won't use fractional delay and ITD information
if (!k.minp_ap_dec)
return NULL;
// the itd will be the same idependently of the spectral field
// so we put spectral to an arbitrary value to avoid duplicates
k.spectral = false;
// if the key is in the map, then it is valid, and an be returned as it
if (_itd_db.find(k) != _itd_db.end())
return _itd_db[k];
// Only one ITD computation method is available for now
return (_itd_db[k] = new ItdCont(k));
}
|
