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
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
/* sc4pd
DelayN~
Copyright (c) 2004 Tim Blechmann.
This code is derived from:
SuperCollider real time audio synthesis system
Copyright (c) 2002 James McCartney. All rights reserved.
http://www.audiosynth.com
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 2
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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Based on:
PureData by Miller Puckette and others.
http://www.crca.ucsd.edu/~msp/software.html
FLEXT by Thomas Grill
http://www.parasitaere-kapazitaeten.net/ext
SuperCollider by James McCartney
http://www.audiosynth.com
Coded while listening to:
*/
#include "sc4pd.hpp"
#include "DelayUnit.hpp"
class DelayN_ar : private DelayUnit_ar
{
FLEXT_HEADER(DelayN_ar,DelayUnit_ar);
DelayN_ar (int argc, t_atom *argv);
~DelayN_ar ();
protected:
virtual void m_signal(int n, t_sample *const *in, t_sample *const *out)
{
m_signal_fun(n,in,out);
}
virtual void m_dsp(int n, t_sample *const *in, t_sample *const *out)
{
changed = false;
DelayUnit_Reset();
}
void m_set(float f)
{
m_delaytime=f;
changed = true;
}
private:
bool changed;
DEFSIGCALL(m_signal_fun);
DEFSIGFUN(m_signal_);
DEFSIGFUN(m_signal_z);
FLEXT_CALLBACK_F(m_set);
};
FLEXT_LIB_DSP_V("DelayN~",DelayN_ar);
DelayN_ar::DelayN_ar (int argc, t_atom *argv)
{
FLEXT_ADDMETHOD_(0,"delaytime",m_set);
//parse arguments
AtomList Args(argc,argv);
if (Args.Count() != 2)
{
post("2 arguments are needed");
return;
}
m_delaytime = sc_getfloatarg(Args,0);
m_maxdelaytime = sc_getfloatarg(Args,1);
SETSIGFUN(m_signal_fun,SIGFUN(m_signal_z));
AddOutSignal();
}
DelayN_ar::~DelayN_ar ()
{
DelayUnit_Dtor();
}
void DelayN_ar::m_signal_z(int n, t_sample *const *in, t_sample *const *out)
{
t_sample *nin = *in;
t_sample *nout = *out;
float *dlybuf = m_dlybuf;
long iwrphase = m_iwrphase;
float dsamp = m_dsamp;
long mask = m_mask;
if (changed)
{
float next_dsamp = CalcDelay(m_delaytime);
float dsamp_slope = CALCSLOPE(next_dsamp, dsamp);
for (int i = 0; i!= n;++i)
{
dsamp += dsamp_slope;
long irdphase = iwrphase - (long)dsamp;
dlybuf[iwrphase & mask] = ZXP(nin);
if (irdphase < 0)
{
ZXP(nout) = 0.f;
}
else
{
ZXP(nout) = dlybuf[irdphase & mask];
}
iwrphase++;
}
m_dsamp = dsamp;
changed = false;
}
else
{
long irdphase = iwrphase - (long)dsamp;
float* dlybuf1 = dlybuf - ZOFF;
float* dlyN = dlybuf1 + m_idelaylen;
long remain = n;
while (remain)
{
float* dlywr = dlybuf1 + (iwrphase & mask);
float* dlyrd = dlybuf1 + (irdphase & mask);
long rdspace = dlyN - dlyrd;
long wrspace = dlyN - dlywr;
long nsmps = sc_min(rdspace, wrspace);
nsmps = sc_min(remain, nsmps);
remain -= nsmps;
if (irdphase < 0)
{
for (int i = 0; i!= nsmps;++i)
{
ZXP(dlywr) = ZXP(nin);
ZXP(nout) = 0.f;
}
}
else
{
for (int i = 0; i!= nsmps;++i)
{
ZXP(dlywr) = ZXP(nin);
ZXP(nout) = ZXP(dlyrd);
}
}
iwrphase += nsmps;
irdphase += nsmps;
}
}
m_iwrphase = iwrphase;
m_numoutput += n;
if (m_numoutput >= m_idelaylen)
{
SETSIGFUN(m_signal_fun,SIGFUN(m_signal_));
}
}
void DelayN_ar::m_signal_(int n, t_sample *const *in, t_sample *const *out)
{
t_sample *nin = *in;
t_sample *nout = *out;
float *dlybuf = m_dlybuf;
long iwrphase = m_iwrphase;
float dsamp = m_dsamp;
long mask = m_mask;
if (changed)
{
float next_dsamp = CalcDelay(m_delaytime);
float dsamp_slope = CALCSLOPE(next_dsamp, dsamp);
for (int i = 0; i!= n;++i)
{
dlybuf[iwrphase & mask] = ZXP(nin);
dsamp += dsamp_slope;
++iwrphase;
long irdphase = iwrphase - (long)dsamp;
ZXP(nout) = dlybuf[irdphase & mask];
}
m_dsamp = dsamp;
changed = false;
}
else
{
long irdphase = iwrphase - (long)dsamp;
float* dlybuf1 = dlybuf - ZOFF;
float* dlyrd = dlybuf1 + (irdphase & mask);
float* dlywr = dlybuf1 + (iwrphase & mask);
float* dlyN = dlybuf1 + m_idelaylen;
long remain = n;
while (remain)
{
long rdspace = dlyN - dlyrd;
long wrspace = dlyN - dlywr;
long nsmps = sc_min(rdspace, wrspace);
nsmps = sc_min(remain, nsmps);
remain -= nsmps;
for (int i = 0; i!= nsmps;++i)
{
ZXP(dlywr) = ZXP(nin);
ZXP(nout) = ZXP(dlyrd);
}
if (dlyrd == dlyN) dlyrd = dlybuf1;
if (dlywr == dlyN) dlywr = dlybuf1;
}
iwrphase += n;
}
m_iwrphase = iwrphase;
}
/* todo: DelayN for control rate ? */
|
