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
|
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <math.h>
#include <netinet/in.h>
#ifdef STANDALONE_ZAPATA
#include "zaptel.h"
#else
#include <linux/zaptel.h>
#endif
#include "coeffs.h"
#define FREQ 1000.0
#define LEVEL 16384.0
#define FIRLEN (sizeof(coeffs) / sizeof(coeffs[0]))
int firguess(int sample)
{
static float hist[FIRLEN] = { 0, };
int x;
float sum;
for (x=FIRLEN-2;x>=0;x--)
hist[x + 1] = hist[x];
hist[0] = sample;
sum = 0;
for (x=0;x<FIRLEN;x++) {
sum += hist[x] * (float)coeffs[x];
}
sum /= 32767.0;
if (sum > 32767.0)
sum = 32767.0;
if (sum < -32768.0)
sum = -32768.0;
return (int)sum;
}
int obufnext(void)
{
static int pos = 0;
static int spos = 0;
float res;
if (++spos > 100) {
res = LEVEL * sin(2.0 * FREQ * M_PI * (float)pos / 8000.0);
if (res > 32767.0)
res = 32767.0;
if (res < -32768.0)
res = -32768.0;
pos++;
} else {
res = 0.0;
spos++;
}
return (int)res;
}
int percent(int a, int b)
{
float af = a;
float bf = b;
if (!b)
return 0;
return (int)((af/bf) * 100.0);
}
int main()
{
int fd;
int fdo,fdo2,fdo3;
int res, x;
int z=0;
short ibuf[512];
short obuf[512];
short pred[512];
fd = open("/dev/zap/1", O_RDWR);
if (fd < 0) {
fprintf(stderr, "open: %s\n", strerror(errno));
exit(1);
}
fdo = open("datain.raw", O_WRONLY | O_TRUNC | O_CREAT);
fdo2 = open("dataout.raw", O_WRONLY | O_TRUNC | O_CREAT);
fdo3 = open("datapred.raw", O_WRONLY | O_TRUNC | O_CREAT);
x = 1;
#if 0
if (ioctl(fd, ZT_AUDIOMODE, &x)) {
fprintf(stderr, "audiomode: %s\n", strerror(errno));
exit(1);
}
x = 1;
if (ioctl(fd, ZT_SETLINEAR, &x)) {
fprintf(stderr, "linear: %s\n", strerror(errno));
exit(1);
}
#endif
for (x=0;x<sizeof(obuf)/sizeof(obuf[0]);x++) {
obuf[x] = obufnext();
}
x = ZT_FLUSH_BOTH;
if (ioctl(fd, ZT_FLUSH, &x)) {
fprintf(stderr, "flush: %s\n", strerror(errno));
exit(1);
}
for (;;) {
for (x=0;x<sizeof(obuf) / sizeof(obuf[0]); x++)
obuf[x] = htons(obuf[x]);
res = write(fd, obuf, sizeof(obuf));
if (res < sizeof(obuf)) {
fprintf(stderr, "Write Buff: %d/%s\n", res, strerror(errno));
exit(1);
}
res = read(fd, ibuf, sizeof(ibuf));
if (res < sizeof(ibuf)) {
fprintf(stderr, "Buff: %d/%s\n", res, strerror(errno));
exit(1);
}
for (x=0;x<sizeof(ibuf) / sizeof(ibuf[0]); x++)
ibuf[x] = ntohs(ibuf[x]);
for (x=0;x<sizeof(obuf) / sizeof(obuf[0]); x++)
obuf[x] = ntohs(obuf[x]);
for (x=0;x<sizeof(pred) / sizeof(pred[0]); x++)
pred[x] = firguess(obuf[x]);
write(fdo, ibuf, sizeof(ibuf));
write(fdo2, obuf, sizeof(obuf));
write(fdo3, pred, sizeof(pred));
for (x=0;x<sizeof(ibuf)/sizeof(ibuf[0]);x++) {
printf("(%5d/%5d/%5d) ", percent(ibuf[x], pred[x]) /*, (int)obuf[x] */, (int)ibuf[x], (int)pred[x]);
obuf[x] = obufnext();
z++;
if (z == 4) {
printf("\n");
z = 0;
}
}
}
}
|
