1 /*
2     Copyright (C) 2003-2008 Fons Adriaensen <fons@kokkinizita.net>
3 
4     This program is free software; you can redistribute it and/or modify
5     it under the terms of the GNU General Public License as published by
6     the Free Software Foundation; either version 2 of the License, or
7     (at your option) any later version.
8 
9     This program is distributed in the hope that it will be useful,
10     but WITHOUT ANY WARRANTY; without even the implied warranty of
11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12     GNU General Public License for more details.
13 
14     You should have received a copy of the GNU General Public License
15     along with this program; if not, write to the Free Software
16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18 
19 
20 #ifndef __ASECTION_H
21 #define __ASECTION_H
22 
23 #include "global.h"
24 
25 using namespace Ms;
26 
27 #define PERIOD 64
28 #define MIXLEN 64
29 #define NCHANN 4
30 #define NRANKS 32
31 
32 //---------------------------------------------------------
33 //   Diffuser
34 //---------------------------------------------------------
35 
36 class Diffuser {
37       float     *_data;
38       int        _size;
39       int        _i;
40       float      _c;
41 
42    public:
43       void init(int size, float c);
44       void fini();
size()45       int  size() { return _size; }
process(float x)46       float process(float x) {
47             float w = x - _c * _data [_i];
48             x = _data [_i] + _c * w;
49             _data [_i] = w;
50             if (++_i == _size)
51                   _i = 0;
52             return x;
53             }
54       };
55 
56 //---------------------------------------------------------
57 //   Asection
58 //---------------------------------------------------------
59 
60 class Asection {
61       enum { AZIMUTH, STWIDTH, DIRECT, REFLECT, REVERB };
62 
63       int      _offs0;
64       int      _offs [16];
65       float    _fsam;
66       float   *_base;
67       float    _sw;
68       float    _sx;
69       float    _sy;
70       Diffuser _dif0;
71       Diffuser _dif1;
72       Diffuser _dif2;
73       Diffuser _dif3;
74       SyntiParameter _apar [5];
75 
76    public:
77       Asection (float fsam);
78       ~Asection ();
79 
get_wptr()80       float *get_wptr () { return _base + _offs0; }
get_apar()81       SyntiParameter *get_apar () { return _apar; }
82       void set_size (float size);
83       void process (float vol, float *W, float *X, float *Y, float *R);
84 
85       static float _refl [16];
86       };
87 
88 #endif
89 
90