aboutsummaryrefslogtreecommitdiff
path: root/signal/pipewrite~.c
blob: 3067261eb2bd78b2b537fb95932aef9f43582753 (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
/* (C) Guenter Geiger <geiger@epy.co.at> */


#include <m_pd.h>
#ifdef NT
#pragma warning( disable : 4244 )
#pragma warning( disable : 4305 )
#endif

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <signal.h>

/*
 * -------------------------- pipewrite~ -------------------------------
 */

#define MAX_CHANS 4
#define BLOCKTIME 0.001
#define uint32 unsigned int
#define uint16 unsigned short

static t_class *pipewrite_class;

typedef struct _pipewrite
{
     t_object x_obj;
     t_symbol* filename;
     int x_file;
     t_int x_channels;
     t_int  size;
     t_glist * x_glist;
     t_int x_blocked;
     t_int x_blockwarn;
     short maxval;
} t_pipewrite;

static void pipewrite_close(t_pipewrite *x)
{
     if (x->x_file > 0) {
	  close(x->x_file);
     }
     x->x_file = -1;
     x->size=0;
}


static void pipewrite_open(t_pipewrite *x,t_symbol *filename)
{
     char fname[MAXPDSTRING];

     if (filename == &s_) {
	  post("pipewrite: open without filename");
	  return;
     }

     canvas_makefilename(glist_getcanvas(x->x_glist), filename->s_name,
			 fname, MAXPDSTRING);
     x->x_blocked = 0;
     x->filename = filename;
     x->maxval=0;
     x->size=0;
     post("pipewrite: filename = %s",x->filename->s_name);

     pipewrite_close(x);
     
     if ((x->x_file = open(fname,O_WRONLY | O_NONBLOCK)) < 0)
     {

	  error("can't open pipe %s: ",fname);
	  perror("system says");
       return;
     }
}

static void pipewrite_block(t_pipewrite *x, t_floatarg f)
{
     x->x_blockwarn = f;
}


static short out[4*64];

static t_int *pipewrite_perform(t_int *w)
{
     t_pipewrite* x = (t_pipewrite*)(w[1]);
     t_float * in[4];
     int c = x->x_channels;
     int i,num,n;
     short* tout = out;
     int ret;
     double timebefore,timeafter;
     double late;
     struct sigaction action;     
     struct sigaction oldaction;
     

     if (x->x_file < 0) {
	 pipewrite_open(x,x->filename);
     }	  

     action.sa_handler = SIG_IGN;
     sigaction(SIGPIPE, &action, &oldaction);

     for (i=0;i < c;i++) {
	  in[i] = (t_float *)(w[2+i]);     
     }

     n = num = (int)(w[2+c]);

     /* loop */

     if (x->x_file >= 0) {

	  while (n--) {
	       for (i=0;i<c;i++)  {
                    if (*(in[i]) > 1. ) { *(in[i]) = 1. ; }
                    if (*(in[i]) < -1. ) { *(in[i]) = -1. ; }
		    *tout++ =  (*(in[i])++ * 32768.);
	       }
	  }
	  
	  timebefore = sys_getrealtime();
	  if ((ret = write(x->x_file,out,sizeof(short)*num*c)) < sizeof(short)*num*c) { 
	       post("pipewrite: short write %d",ret);
	       
	  }

	  timeafter = sys_getrealtime();
	  late = timeafter - timebefore;
          x->size +=ret;
	  /* OK, we let only 10 ms block here */
	  if (late > BLOCKTIME && x->x_blockwarn) { 
	       x->x_blocked++;
	       if (x->x_blocked > x->x_blockwarn) {
		    x->x_blocked=0;
/*		    post("maximum blockcount %d reached",x->x_blockwarn); */
	       }
	  }
     }

     sigaction(SIGPIPE, &oldaction, NULL);

     return (w+3+c);
}



static void pipewrite_dsp(t_pipewrite *x, t_signal **sp)
{
     switch (x->x_channels) {
     case 1:
	  dsp_add(pipewrite_perform, 3, x, sp[0]->s_vec, 
		   sp[0]->s_n);
	  break;
     case 2:
	  dsp_add(pipewrite_perform, 4, x, sp[0]->s_vec, 
		  sp[1]->s_vec, sp[0]->s_n);
	  break;
     case 4:
	  dsp_add(pipewrite_perform, 6, x, sp[0]->s_vec, 
		  sp[1]->s_vec,
		  sp[2]->s_vec,
		  sp[3]->s_vec,
		  sp[0]->s_n);
	  break;
     }
}

static void pipewrite_free(t_pipewrite* x)
{
     pipewrite_close(x);
}


static void *pipewrite_new(t_symbol* name,t_floatarg chan)
{
    t_pipewrite *x = (t_pipewrite *)pd_new(pipewrite_class);
    t_int c = chan;

    if (c<1 || c > MAX_CHANS) c = 1;

    x->x_glist = (t_glist*) canvas_getcurrent();
    x->x_channels = c--;
    post("channels:%d",x->x_channels);
    x->x_file=0;
    x->x_blocked = 0;
    x->x_blockwarn = 10;
    while (c--) {
	 inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
    }

    if (name && name != &s_) { /* start the pipe */
	 pipewrite_open(x,name);
    }

    return (x);
}

void pipewrite_tilde_setup(void)
{
     pipewrite_class = class_new(gensym("pipewrite~"), (t_newmethod)pipewrite_new, (t_method)pipewrite_free,
    	sizeof(t_pipewrite), 0,A_DEFSYM,A_DEFFLOAT,A_NULL);
     class_addmethod(pipewrite_class,nullfn,gensym("signal"), 0);
     class_addmethod(pipewrite_class, (t_method) pipewrite_dsp, gensym("dsp"), 0);
     class_addmethod(pipewrite_class, (t_method) pipewrite_open, gensym("open"), A_SYMBOL,A_NULL);
     class_addmethod(pipewrite_class, (t_method) pipewrite_close, gensym("close"), 0);
    class_addmethod(pipewrite_class, (t_method)pipewrite_block,gensym("block"),A_DEFFLOAT,0);
     
}