aboutsummaryrefslogtreecommitdiff
path: root/cyclone/sickle/Line.c
blob: eb8be2689df0e9dc713fbd8d868b6bd4d4b79c57 (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
/* Copyright (c) 2002-2003 krzYszcz and others.
 * For information on usage and redistribution, and for a DISCLAIMER OF ALL
 * WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */

#include "m_pd.h"
#include "shared.h"
#include "common/grow.h"
#include "common/loud.h"
#include "sickle/sic.h"

#ifdef KRZYSZCZ
//#define LINE_DEBUG
#endif

#define LINE_INISIZE  64  /* LATER rethink */
#define LINE_MAXSIZE  64

typedef struct _lineseg
{
    float  s_target;
    float  s_delta;
} t_lineseg;

typedef struct _line
{
    t_sic       x_sic;
    float       x_value;
    float       x_target;
    float       x_delta;
    int         x_deltaset;
    float       x_inc;
    float       x_biginc;
    float       x_ksr;
    int         x_nleft;
    int         x_retarget;
    int         x_size;   /* as allocated */
    int         x_nsegs;  /* as used */
    t_lineseg  *x_curseg;
    t_lineseg  *x_segs;
    t_lineseg   x_segini[LINE_INISIZE];
    t_clock    *x_clock;
    t_outlet   *x_bangout;
#ifdef LINE_DEBUG
    int         dbg_nretargets;
    int         dbg_exitpoint;
    int         dbg_npoints;
#endif
} t_line;

static t_class *line_class;

static void line_tick(t_line *x)
{
    outlet_bang(x->x_bangout);
#ifdef LINE_DEBUG
    loudbug_post("exit point %d, after %d retarget calls",
		 x->dbg_exitpoint, x->dbg_nretargets);
    loudbug_post("at value %g, after last %d npoints, with inc %g, biginc %g",
		 x->x_value, x->dbg_npoints, x->x_inc, x->x_biginc);
    x->dbg_nretargets = x->dbg_exitpoint = x->dbg_npoints = 0;
#endif
}

static t_int *line_perform(t_int *w)
{
    t_line *x = (t_line *)(w[1]);
    t_float *out = (t_float *)(w[2]);
    int nblock = (int)(w[3]);
    int nxfer = x->x_nleft;
    float curval = x->x_value;
    float inc = x->x_inc;
    float biginc = x->x_biginc;
    if (PD_BADFLOAT(curval))  /* LATER rethink */
	curval = x->x_value = 0;
retarget:
    if (x->x_retarget)
    {
	float target = x->x_curseg->s_target;
	float delta = x->x_curseg->s_delta;
    	int npoints = delta * x->x_ksr + 0.5;  /* LATER rethink */
#ifdef LINE_DEBUG
	x->dbg_nretargets++;
#endif
	x->x_nsegs--;
	x->x_curseg++;
    	while (npoints <= 0)
	{
	    curval = x->x_value = target;
	    if (x->x_nsegs)
	    {
		target = x->x_curseg->s_target;
		delta = x->x_curseg->s_delta;
		npoints = delta * x->x_ksr + 0.5;  /* LATER rethink */
		x->x_nsegs--;
		x->x_curseg++;
	    }
	    else
	    {
		while (nblock--) *out++ = curval;
		x->x_nleft = 0;
#ifdef LINE_DEBUG
		x->dbg_exitpoint = 1;
#endif
		clock_delay(x->x_clock, 0);
		x->x_retarget = 0;
		return (w + 4);
	    }
	}
    	nxfer = x->x_nleft = npoints;
    	inc = x->x_inc = (target - x->x_value) / (float)npoints;
	x->x_biginc = (int)(w[3]) * inc;
	biginc = nblock * inc;
	x->x_target = target;
    	x->x_retarget = 0;
#ifdef LINE_DEBUG
	x->dbg_npoints = npoints;
#endif
    }
    if (nxfer >= nblock)
    {
	if ((x->x_nleft -= nblock) == 0)
	{
	    if (x->x_nsegs) x->x_retarget = 1;
	    else
	    {
#ifdef LINE_DEBUG
		x->dbg_exitpoint = 2;
#endif
		clock_delay(x->x_clock, 0);
	    }
	    x->x_value = x->x_target;
	}
	else x->x_value += biginc;
    	while (nblock--)
	    *out++ = curval, curval += inc;
    }
    else if (nxfer > 0)
    {
	nblock -= nxfer;
	do
	    *out++ = curval, curval += inc;
	while (--nxfer);
	curval = x->x_value = x->x_target;
	if (x->x_nsegs)
	{
	    x->x_retarget = 1;
	    goto retarget;
	}
	else
	{
	    while (nblock--) *out++ = curval;
	    x->x_nleft = 0;
#ifdef LINE_DEBUG
	    x->dbg_exitpoint = 3;
#endif
	    clock_delay(x->x_clock, 0);
	}
    }
    else while (nblock--) *out++ = curval;
    return (w + 4);
}

static void line_float(t_line *x, t_float f)
{
    if (x->x_deltaset)
    {
    	x->x_deltaset = 0;
    	x->x_target = f;
	x->x_nsegs = 1;
	x->x_curseg = x->x_segs;
	x->x_curseg->s_target = f;
	x->x_curseg->s_delta = x->x_delta;
    	x->x_retarget = 1;
    }
    else
    {
    	x->x_value = x->x_target = f;
	x->x_nsegs = 0;
	x->x_curseg = 0;
    	x->x_nleft = 0;
	x->x_retarget = 0;
    }
}

static void line_ft1(t_line *x, t_floatarg f)
{
    x->x_delta = f;
    x->x_deltaset = (f > 0);
}

static void line_list(t_line *x, t_symbol *s, int ac, t_atom *av)
{
    int natoms, nsegs, odd;
    t_atom *ap;
    t_lineseg *segp;
    for (natoms = 0, ap = av; natoms < ac; natoms++, ap++)
    {
	if (ap->a_type != A_FLOAT)
	{
	    loud_messarg((t_pd *)x, &s_list);  /* CHECKED */
	    return;  /* CHECKED */
	}
    }
    if (!natoms)
	return;  /* CHECKED */
    odd = natoms % 2;
    nsegs = natoms / 2;
    if (odd) nsegs++;
    if (nsegs > x->x_size)
    {
	int ns = nsegs;
	x->x_segs = grow_nodata(&ns, &x->x_size, x->x_segs,
				LINE_INISIZE, x->x_segini,
				sizeof(*x->x_segs));
	if (ns < nsegs)
	{
	    natoms = ns * 2;
	    nsegs = ns;
	    odd = 0;
	}
    }
    x->x_nsegs = nsegs;
#ifdef LINE_DEBUG
    loudbug_post("%d segments:", x->x_nsegs);
#endif
    segp = x->x_segs;
    if (odd) nsegs--;
    while (nsegs--)
    {
	segp->s_target = av++->a_w.w_float;
	segp->s_delta = av++->a_w.w_float;
#ifdef LINE_DEBUG
	loudbug_post("%g %g", segp->s_target, segp->s_delta);
#endif
	segp++;
    }
    if (odd)
    {
	segp->s_target = av->a_w.w_float;
	segp->s_delta = 0;
#ifdef LINE_DEBUG
	loudbug_post("%g %g", segp->s_target, segp->s_delta);
#endif
    }
    x->x_deltaset = 0;
    x->x_target = x->x_segs->s_target;
    x->x_curseg = x->x_segs;
    x->x_retarget = 1;
}

/* CHECKED no stop, pity... */
#if 0
static void line_stop(t_line *x)
{
    x->x_target = x->x_value;
    x->x_nleft = 0;
    x->x_retarget = 0;
    x->x_nsegs = 0;
    x->x_curseg = 0;
}
#endif

static void line_dsp(t_line *x, t_signal **sp)
{
    dsp_add(line_perform, 3, x, sp[0]->s_vec, sp[0]->s_n);
    x->x_ksr = sp[0]->s_sr * 0.001;
}

static void line_free(t_line *x)
{
    if (x->x_segs != x->x_segini)
	freebytes(x->x_segs, x->x_size * sizeof(*x->x_segs));
    if (x->x_clock) clock_free(x->x_clock);
}

static void *line_new(t_floatarg f)
{
    t_line *x = (t_line *)pd_new(line_class);
    x->x_value = x->x_target = f;
    x->x_deltaset = 0;
    x->x_nleft = 0;
    x->x_retarget = 0;
    x->x_size = LINE_INISIZE;
    x->x_nsegs = 0;
    x->x_segs = x->x_segini;
    x->x_curseg = 0;
    inlet_new((t_object *)x, (t_pd *)x, &s_float, gensym("ft1"));
    outlet_new((t_object *)x, &s_signal);
    x->x_bangout = outlet_new((t_object *)x, &s_bang);
    x->x_clock = clock_new(x, (t_method)line_tick);
    return (x);
}

void Line_tilde_setup(void)
{
    line_class = class_new(gensym("Line~"),
			   (t_newmethod)line_new,
			   (t_method)line_free,
			   sizeof(t_line), 0, A_DEFFLOAT, 0);
    sic_setup(line_class, line_dsp, SIC_NOMAINSIGNALIN);
    class_addfloat(line_class, line_float);
    class_addlist(line_class, line_list);
    class_addmethod(line_class, (t_method)line_ft1,
		    gensym("ft1"), A_FLOAT, 0);
}