summaryrefslogtreecommitdiffstats
path: root/apps/plugins/pdbox/PDa/intern/bp~.c
blob: f247c1d66b381b86a185ccb9f152f8c4d8ce9894 (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
#include <m_pd.h>
#include <m_fixed.h>

typedef struct bpctl
{
    t_sample c_x1;
    t_sample c_x2;
    t_sample c_coef1;
    t_sample c_coef2;
    t_sample c_gain;
} t_bpctl;

typedef struct sigbp
{
    t_object x_obj;
    float x_sr;
    float x_freq;
    float x_q;
    t_bpctl x_cspace;
    t_bpctl *x_ctl;
    float x_f;
} t_sigbp;

t_class *sigbp_class;

static void sigbp_docoef(t_sigbp *x, t_floatarg f, t_floatarg q);

static void *sigbp_new(t_floatarg f, t_floatarg q)
{
    t_sigbp *x = (t_sigbp *)pd_new(sigbp_class);
    inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("ft1"));
    inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("ft2"));
    outlet_new(&x->x_obj, gensym("signal"));
    x->x_sr = 44100;
    x->x_ctl = &x->x_cspace;
    x->x_cspace.c_x1 = 0;
    x->x_cspace.c_x2 = 0;
    sigbp_docoef(x, f, q);
    x->x_f = 0;
    return (x);
}

static float sigbp_qcos(float f)
{
    if (f >= -(0.5f*3.14159f) && f <= 0.5f*3.14159f)
    {
    	float g = f*f;
    	return (((g*g*g * (-1.0f/720.0f) + g*g*(1.0f/24.0f)) - g*0.5) + 1);
    }
    else return (0);
}

static void sigbp_docoef(t_sigbp *x, t_floatarg f, t_floatarg q)
{
    float r, oneminusr, omega;
    if (f < 0.001) f = 10;
    if (q < 0) q = 0;
    x->x_freq = f;
    x->x_q = q;
    omega = f * (2.0f * 3.14159f) / x->x_sr;
    if (q < 0.001) oneminusr = 1.0f;
    else oneminusr = omega/q;
    if (oneminusr > 1.0f) oneminusr = 1.0f;
    r = 1.0f - oneminusr;
    x->x_ctl->c_coef1 = ftofix(2.0f * sigbp_qcos(omega) * r);
    x->x_ctl->c_coef2 = ftofix(- r * r);
    x->x_ctl->c_gain = ftofix(2 * oneminusr * (oneminusr + r * omega));
    /* post("r %f, omega %f, coef1 %f, coef2 %f",
    	r, omega, x->x_ctl->c_coef1, x->x_ctl->c_coef2); */
}

static void sigbp_ft1(t_sigbp *x, t_floatarg f)
{
    sigbp_docoef(x, f, x->x_q);
}

static void sigbp_ft2(t_sigbp *x, t_floatarg q)
{
    sigbp_docoef(x, x->x_freq, q);
}

static void sigbp_clear(t_sigbp *x, t_floatarg q)
{
    x->x_ctl->c_x1 = x->x_ctl->c_x2 = 0;
}

static t_int *sigbp_perform(t_int *w)
{
    t_sample *in = (t_sample *)(w[1]);
    t_sample *out = (t_sample *)(w[2]);
    t_bpctl *c = (t_bpctl *)(w[3]);
    int n = (t_int)(w[4]);
    int i;
    t_sample last = c->c_x1;
    t_sample prev = c->c_x2;
    t_sample coef1 = c->c_coef1;
    t_sample coef2 = c->c_coef2;
    t_sample gain = c->c_gain;
    for (i = 0; i < n; i++)
    {
    	t_sample output =  *in++ + mult(coef1,last) + mult(coef2,prev);
    	*out++ = mult(gain,output);
	prev = last;
	last = output;
    }
    if (PD_BADFLOAT(last))
    	last = 0;
    if (PD_BADFLOAT(prev))
    	prev = 0;
    c->c_x1 = last;
    c->c_x2 = prev;
    return (w+5);
}

static void sigbp_dsp(t_sigbp *x, t_signal **sp)
{
    x->x_sr = sp[0]->s_sr;
    sigbp_docoef(x, x->x_freq, x->x_q);
    dsp_add(sigbp_perform, 4,
	sp[0]->s_vec, sp[1]->s_vec, 
	    x->x_ctl, sp[0]->s_n);

}

void bp_tilde_setup(void)
{
    sigbp_class = class_new(gensym("bp~"), (t_newmethod)sigbp_new, 0,
	sizeof(t_sigbp), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
    CLASS_MAINSIGNALIN(sigbp_class, t_sigbp, x_f);
    class_addmethod(sigbp_class, (t_method)sigbp_dsp, gensym("dsp"), 0);
    class_addmethod(sigbp_class, (t_method)sigbp_ft1,
    	gensym("ft1"), A_FLOAT, 0);
    class_addmethod(sigbp_class, (t_method)sigbp_ft2,
    	gensym("ft2"), A_FLOAT, 0);
    class_addmethod(sigbp_class, (t_method)sigbp_clear, gensym("clear"), 0);
    class_sethelpsymbol(sigbp_class, gensym("lop~-help.pd"));
}

#include <m_pd.h>
#include <m_fixed.h>

typedef struct bpctl
{
    t_sample c_x1;
    t_sample c_x2;
    t_sample c_coef1;
    t_sample c_coef2;
    t_sample c_gain;
} t_bpctl;

typedef struct sigbp
{
    t_object x_obj;
    float x_sr;
    float x_freq;
    float x_q;
    t_bpctl x_cspace;
    t_bpctl *x_ctl;
    float x_f;
} t_sigbp;

t_class *sigbp_class;

static void sigbp_docoef(t_sigbp *x, t_floatarg f, t_floatarg q);

static void *sigbp_new(t_floatarg f, t_floatarg q)
{
    t_sigbp *x = (t_sigbp *)pd_new(sigbp_class);
    inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("ft1"));
    inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("ft2"));
    outlet_new(&x->x_obj, gensym("signal"));
    x->x_sr = 44100;
    x->x_ctl = &x->x_cspace;
    x->x_cspace.c_x1 = 0;
    x->x_cspace.c_x2 = 0;
    sigbp_docoef(x, f, q);
    x->x_f = 0;
    return (x);
}

static float sigbp_qcos(float f)
{
    if (f >= -(0.5f*3.14159f) && f <= 0.5f*3.14159f)
    {
    	float g = f*f;
    	return (((g*g*g * (-1.0f/720.0f) + g*g*(1.0f/24.0f)) - g*0.5) + 1);
    }
    else return (0);
}

static void sigbp_docoef(t_sigbp *x, t_floatarg f, t_floatarg q)
{
    float r, oneminusr, omega;
    if (f < 0.001) f = 10;
    if (q < 0) q = 0;
    x->x_freq = f;
    x->x_q = q;
    omega = f * (2.0f * 3.14159f) / x->x_sr;
    if (q < 0.001) oneminusr = 1.0f;
    else oneminusr = omega/q;
    if (oneminusr > 1.0f) oneminusr = 1.0f;
    r = 1.0f - oneminusr;
    x->x_ctl->c_coef1 = ftofix(2.0f * sigbp_qcos(omega) * r);
    x->x_ctl->c_coef2 = ftofix(- r * r);
    x->x_ctl->c_gain = ftofix(2 * oneminusr * (oneminusr + r * omega));
    /* post("r %f, omega %f, coef1 %f, coef2 %f",
    	r, omega, x->x_ctl->c_coef1, x->x_ctl->c_coef2); */
}

static void sigbp_ft1(t_sigbp *x, t_floatarg f)
{
    sigbp_docoef(x, f, x->x_q);
}

static void sigbp_ft2(t_sigbp *x, t_floatarg q)
{
    sigbp_docoef(x, x->x_freq, q);
}

static void sigbp_clear(t_sigbp *x, t_floatarg q)
{
    x->x_ctl->c_x1 = x->x_ctl->c_x2 = 0;
}

static t_int *sigbp_perform(t_int *w)
{
    t_sample *in = (t_sample *)(w[1]);
    t_sample *out = (t_sample *)(w[2]);
    t_bpctl *c = (t_bpctl *)(w[3]);
    int n = (t_int)(w[4]);
    int i;
    t_sample last = c->c_x1;
    t_sample prev = c->c_x2;
    t_sample coef1 = c->c_coef1;
    t_sample coef2 = c->c_coef2;
    t_sample gain = c->c_gain;
    for (i = 0; i < n; i++)
    {
    	t_sample output =  *in++ + mult(coef1,last) + mult(coef2,prev);
    	*out++ = mult(gain,output);
	prev = last;
	last = output;
    }
    if (PD_BADFLOAT(last))
    	last = 0;
    if (PD_BADFLOAT(prev))
    	prev = 0;
    c->c_x1 = last;
    c->c_x2 = prev;
    return (w+5);
}

static void sigbp_dsp(t_sigbp *x, t_signal **sp)
{
    x->x_sr = sp[0]->s_sr;
    sigbp_docoef(x, x->x_freq, x->x_q);
    dsp_add(sigbp_perform, 4,
	sp[0]->s_vec, sp[1]->s_vec, 
	    x->x_ctl, sp[0]->s_n);

}

void bp_tilde_setup(void)
{
    sigbp_class = class_new(gensym("bp~"), (t_newmethod)sigbp_new, 0,
	sizeof(t_sigbp), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
    CLASS_MAINSIGNALIN(sigbp_class, t_sigbp, x_f);
    class_addmethod(sigbp_class, (t_method)sigbp_dsp, gensym("dsp"), 0);
    class_addmethod(sigbp_class, (t_method)sigbp_ft1,
    	gensym("ft1"), A_FLOAT, 0);
    class_addmethod(sigbp_class, (t_method)sigbp_ft2,
    	gensym("ft2"), A_FLOAT, 0);
    class_addmethod(sigbp_class, (t_method)sigbp_clear, gensym("clear"), 0);
    class_sethelpsymbol(sigbp_class, gensym("lop~-help.pd"));
}