summaryrefslogtreecommitdiffstats
path: root/apps/plugins/pdbox/PDa/src/d_delay.c
blob: d04ded9e903d68290efa4f6addf354c66f7ab84d (plain)
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
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
/* Copyright (c) 1997-1999 Miller Puckette.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */

/*  send~, delread~, throw~, catch~ */

#include "m_pd.h"
extern int ugen_getsortno(void);

#define DEFDELVS 64	    	/* LATER get this from canvas at DSP time */
static int delread_zero = 0;	/* four bytes of zero for delread~, vd~ */

/* ----------------------------- delwrite~ ----------------------------- */
static t_class *sigdelwrite_class;

typedef struct delwritectl
{
    int c_n;
    float *c_vec;
    int c_phase;
} t_delwritectl;

typedef struct _sigdelwrite
{
    t_object x_obj;
    t_symbol *x_sym;
    t_delwritectl x_cspace;
    int x_sortno;   /* DSP sort number at which this was last put on chain */
    int x_rsortno;  /* DSP sort # for first delread or write in chain */
    int x_vecsize;  /* vector size for delread~ to use */
    float x_f;
} t_sigdelwrite;

#define XTRASAMPS 4
#define SAMPBLK 4

    /* routine to check that all delwrites/delreads/vds have same vecsize */
static void sigdelwrite_checkvecsize(t_sigdelwrite *x, int vecsize)
{
    /*
    	LATER this should really check sample rate and blocking, once that is
	supported.  Probably we don't actually care about vecsize.
	For now just suppress this check... */
#if 0
    if (x->x_rsortno != ugen_getsortno())
    {
    	x->x_vecsize = vecsize;
	x->x_rsortno = ugen_getsortno();
    }
    else if (vecsize != x->x_vecsize)
    	pd_error(x, "delread/delwrite/vd vector size mismatch");
#endif
}

static void *sigdelwrite_new(t_symbol *s, t_floatarg msec)
{
    int nsamps;
    t_sigdelwrite *x = (t_sigdelwrite *)pd_new(sigdelwrite_class);
    if (!*s->s_name) s = gensym("delwrite~");
    pd_bind(&x->x_obj.ob_pd, s);
    x->x_sym = s;
    nsamps = msec * sys_getsr() * (float)(0.001f);
    if (nsamps < 1) nsamps = 1;
    nsamps += ((- nsamps) & (SAMPBLK - 1));
    nsamps += DEFDELVS;
    x->x_cspace.c_n = nsamps;
    x->x_cspace.c_vec =
    	(float *)getbytes((nsamps + XTRASAMPS) * sizeof(float));
    x->x_cspace.c_phase = XTRASAMPS;
    x->x_sortno = 0;
    x->x_vecsize = 0;
    x->x_f = 0;
    return (x);
}

static t_int *sigdelwrite_perform(t_int *w)
{
    t_float *in = (t_float *)(w[1]);
    t_delwritectl *c = (t_delwritectl *)(w[2]);
    int n = (int)(w[3]);
    int phase = c->c_phase, nsamps = c->c_n;
    float *vp = c->c_vec, *bp = vp + phase, *ep = vp + (c->c_n + XTRASAMPS);
    phase += n;
    while (n--)
    {
    	float f = *in++;
    	if (PD_BIGORSMALL(f))
	    f = 0;
    	*bp++ = f;
    	if (bp == ep)
    	{
    	    vp[0] = ep[-4];
    	    vp[1] = ep[-3];
    	    vp[2] = ep[-2];
    	    vp[3] = ep[-1];
    	    bp = vp + XTRASAMPS;
    	    phase -= nsamps;
    	}
    }
    c->c_phase = phase; 
    return (w+4);
}

static void sigdelwrite_dsp(t_sigdelwrite *x, t_signal **sp)
{
    dsp_add(sigdelwrite_perform, 3, sp[0]->s_vec, &x->x_cspace, sp[0]->s_n);
    x->x_sortno = ugen_getsortno();
    sigdelwrite_checkvecsize(x, sp[0]->s_n);
}

static void sigdelwrite_free(t_sigdelwrite *x)
{
    pd_unbind(&x->x_obj.ob_pd, x->x_sym);
    freebytes(x->x_cspace.c_vec,
    	(x->x_cspace.c_n + XTRASAMPS) * sizeof(float));
}

static void sigdelwrite_setup(void)
{
    sigdelwrite_class = class_new(gensym("delwrite~"), 
    	(t_newmethod)sigdelwrite_new, (t_method)sigdelwrite_free,
    	sizeof(t_sigdelwrite), 0, A_DEFSYM, A_DEFFLOAT, 0);
    CLASS_MAINSIGNALIN(sigdelwrite_class, t_sigdelwrite, x_f);
    class_addmethod(sigdelwrite_class, (t_method)sigdelwrite_dsp,
    	gensym("dsp"), 0);
}

/* ----------------------------- delread~ ----------------------------- */
static t_class *sigdelread_class;

typedef struct _sigdelread
{
    t_object x_obj;
    t_symbol *x_sym;
    t_float x_deltime;	/* delay in msec */
    int x_delsamps; 	/* delay in samples */
    t_float x_sr;   	/* samples per msec */
    t_float x_n;   	/* vector size */
    int x_zerodel;  	/* 0 or vecsize depending on read/write order */
} t_sigdelread;

static void sigdelread_float(t_sigdelread *x, t_float f);

static void *sigdelread_new(t_symbol *s, t_floatarg f)
{
    t_sigdelread *x = (t_sigdelread *)pd_new(sigdelread_class);
    x->x_sym = s;
    x->x_sr = 1;
    x->x_n = 1;
    x->x_zerodel = 0;
    sigdelread_float(x, f);
    outlet_new(&x->x_obj, &s_signal);
    return (x);
}

static void sigdelread_float(t_sigdelread *x, t_float f)
{
    int samps;
    t_sigdelwrite *delwriter =
    	(t_sigdelwrite *)pd_findbyclass(x->x_sym, sigdelwrite_class);
    x->x_deltime = f;
    if (delwriter)
    {
    	int delsize = delwriter->x_cspace.c_n;
    	x->x_delsamps = (int)(0.5 + x->x_sr * x->x_deltime)
    	    + x->x_n - x->x_zerodel;
    	if (x->x_delsamps < x->x_n) x->x_delsamps = x->x_n;
    	else if (x->x_delsamps > delwriter->x_cspace.c_n - DEFDELVS)
    	    x->x_delsamps = delwriter->x_cspace.c_n - DEFDELVS;
    }
}

static t_int *sigdelread_perform(t_int *w)
{
    t_float *out = (t_float *)(w[1]);
    t_delwritectl *c = (t_delwritectl *)(w[2]);
    int delsamps = *(int *)(w[3]);
    int n = (int)(w[4]);
    int phase = c->c_phase - delsamps, nsamps = c->c_n;
    float *vp = c->c_vec, *bp, *ep = vp + (c->c_n + XTRASAMPS);

    if (phase < 0) phase += nsamps;
    bp = vp + phase;
    while (n--)
    {
    	*out++ = *bp++;
    	if (bp == ep) bp -= nsamps;
    }
    return (w+5);
}

static void sigdelread_dsp(t_sigdelread *x, t_signal **sp)
{
    t_sigdelwrite *delwriter =
    	(t_sigdelwrite *)pd_findbyclass(x->x_sym, sigdelwrite_class);
    x->x_sr = sp[0]->s_sr * 0.001;
    x->x_n = sp[0]->s_n;
    if (delwriter)
    {
    	sigdelwrite_checkvecsize(delwriter, sp[0]->s_n);
    	x->x_zerodel = (delwriter->x_sortno == ugen_getsortno() ?
    	    0 : delwriter->x_vecsize);
    	sigdelread_float(x, x->x_deltime);
    	dsp_add(sigdelread_perform, 4,
    	    sp[0]->s_vec, &delwriter->x_cspace, &x->x_delsamps, sp[0]->s_n);
    }
    else if (*x->x_sym->s_name)
    	error("delread~: %s: no such delwrite~",x->x_sym->s_name);
}

static void sigdelread_setup(void)
{
    sigdelread_class = class_new(gensym("delread~"),
    	(t_newmethod)sigdelread_new, 0,
    	sizeof(t_sigdelread), 0, A_DEFSYM, A_DEFFLOAT, 0);
    class_addmethod(sigdelread_class, (t_method)sigdelread_dsp,
    	gensym("dsp"), 0);
    class_addfloat(sigdelread_class, (t_method)sigdelread_float);
}


/* ----------------------------- vd~ ----------------------------- */
static t_class *sigvd_class;

typedef struct _sigvd
{
    t_object x_obj;
    t_symbol *x_sym;
    t_float x_sr;   	/* samples per msec */
    int x_zerodel;  	/* 0 or vecsize depending on read/write order */
    float x_f;
} t_sigvd;

static void *sigvd_new(t_symbol *s)
{
    t_sigvd *x = (t_sigvd *)pd_new(sigvd_class);
    if (!*s->s_name) s = gensym("vd~");
    x->x_sym = s;
    x->x_sr = 1;
    x->x_zerodel = 0;
    outlet_new(&x->x_obj, &s_signal);
    x->x_f = 0;
    return (x);
}

static t_int *sigvd_perform(t_int *w)
{
    t_float *in = (t_float *)(w[1]);
    t_float *out = (t_float *)(w[2]);
    t_delwritectl *ctl = (t_delwritectl *)(w[3]);
    t_sigvd *x = (t_sigvd *)(w[4]);
    int n = (int)(w[5]);

    int nsamps = ctl->c_n;
    float limit = nsamps - n - 1;
    float fn = n-1;
    float *vp = ctl->c_vec, *bp, *wp = vp + ctl->c_phase;
    float zerodel = x->x_zerodel;
    while (n--)
    {
    	float delsamps = x->x_sr * *in++ - zerodel, frac;
    	int idelsamps;
    	float a, b, c, d, cminusb;
    	if (delsamps < 1.00001f) delsamps = 1.00001f;
    	if (delsamps > limit) delsamps = limit;
    	delsamps += fn;
    	fn = fn - 1.0f;
    	idelsamps = delsamps;
    	frac = delsamps - (float)idelsamps;
    	bp = wp - idelsamps;
    	if (bp < vp + 4) bp += nsamps;
    	d = bp[-3];
    	c = bp[-2];
    	b = bp[-1];
    	a = bp[0];
    	cminusb = c-b;
    	*out++ = b + frac * (
	    cminusb - 0.1666667f * (1.-frac) * (
		(d - a - 3.0f * cminusb) * frac + (d + 2.0f*a - 3.0f*b)
	    )
	);
    }
    return (w+6);
}

static void sigvd_dsp(t_sigvd *x, t_signal **sp)
{
    t_sigdelwrite *delwriter =
    	(t_sigdelwrite *)pd_findbyclass(x->x_sym, sigdelwrite_class);
    x->x_sr = sp[0]->s_sr * 0.001;
    if (delwriter)
    {
    	sigdelwrite_checkvecsize(delwriter, sp[0]->s_n);
    	x->x_zerodel = (delwriter->x_sortno == ugen_getsortno() ?
    	    0 : delwriter->x_vecsize);
    	dsp_add(sigvd_perform, 5,
    	    sp[0]->s_vec, sp[1]->s_vec,
    	    	&delwriter->x_cspace, x, sp[0]->s_n);
    }
    else error("vd~: %s: no such delwrite~",x->x_sym->s_name);
}

static void sigvd_setup(void)
{
    sigvd_class = class_new(gensym("vd~"), (t_newmethod)sigvd_new, 0,
    	sizeof(t_sigvd), 0, A_DEFSYM, 0);
    class_addmethod(sigvd_class, (t_method)sigvd_dsp, gensym("dsp"), 0);
    CLASS_MAINSIGNALIN(sigvd_class, t_sigvd, x_f);
}

/* ----------------------- global setup routine ---------------- */

void d_delay_setup(void)
{
    sigdelwrite_setup();
    sigdelread_setup();
    sigvd_setup();
}