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
|
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <math.h>
struct DFEntryType {
char field[17];
int spf;
int fp;
};
#define NDF 5
#define SCOUNT 0
#define FCOUNT 1
#define SINE 2
#define SSINE 3
#define COS 4
struct DFEntryType df[NDF] = {
{"scount", 1, -1},
{"fcount", 20, -1},
{"sine", 20, -1},
{"ssine", 1, -1},
{"cos", 20, -1}
};
int main() {
char dirfilename[120];
char tmpstr[150];
FILE *fpf;
int i, count = 0;
float x;
sprintf(dirfilename, "%d.dm", time(NULL));
printf("Writing dirfile %s\n", dirfilename);
printf("The fields are:\n");
for (i=0; i<NDF; i++) {
printf("%16s %2d samples per frame\n", df[i].field, df[i].spf);
}
if (mkdir(dirfilename, 00755) < 0) {
perror("dirfile mkdir()");
exit(0);
}
sprintf(tmpstr,"%s/format", dirfilename);
fpf = fopen(tmpstr,"w");
for (i=0; i<NDF; i++) {
fprintf(fpf,"%s RAW f %d\n", df[i].field, df[i].spf);
sprintf(tmpstr,"%s/%s", dirfilename, df[i].field);
df[i].fp = open(tmpstr, O_WRONLY|O_CREAT, 00644);
}
fclose(fpf);
/* make curfile */
fpf = fopen("dm.cur", "w");
fprintf(fpf,"%s", dirfilename);
fclose(fpf);
while (1) {
/* write 'count' */
x = count;
write(df[SCOUNT].fp, &x, sizeof(float));
/* write 'fcount' */
for (i=0; i<df[FCOUNT].spf; i++) {
x = count*df[FCOUNT].spf+i;
write(df[FCOUNT].fp, &x, sizeof(float));
}
/* write 'sine' */
for (i=0; i<df[SINE].spf; i++) {
x = count*df[SINE].spf+i;
x = sin(2.0*M_PI*x/100.0);
write(df[SINE].fp, &x, sizeof(float));
}
/* write 'ssine' */
for (i=0; i<df[SSINE].spf; i++) {
x = count*df[SSINE].spf+i;
x = sin(2.0*M_PI*x/100.0);
write(df[SSINE].fp, &x, sizeof(float));
}
/* write 'cos' */
for (i=0; i<df[COS].spf; i++) {
x = count*df[COS].spf+i;
x = cos(2.0*M_PI*x/100.0);
write(df[COS].fp, &x, sizeof(float));
}
printf("writing frame %d \r", count);
fflush(stdout);
usleep(200000);
count++;
}
return (42);
}
|
