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comparison spandsp-0.0.3/user/sample.c @ 5:f762bf195c4b

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import spandsp-0.0.3
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Fri, 25 Jun 2010 16:00:21 +0200
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4:26cd8f1ef0b1 5:f762bf195c4b
1 /*
2 sample.c
3 David Rowe 14 December 2006
4
5 User mode side of zaptel echo sampling system.
6
7 Compile:
8
9 gcc sample.c -o sample -Wall
10 */
11
12 /*
13 Copyright (C) 2007 David Rowe
14
15 All rights reserved.
16
17 This program is free software; you can redistribute it and/or modify
18 it under the terms of the GNU General Public License version 2, as
19 published by the Free Software Foundation.
20
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
25
26 You should have received a copy of the GNU General Public License
27 along with this program; if not, write to the Free Software
28 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 */
30
31 #include <sys/types.h>
32 #include <sys/stat.h>
33 #include <fcntl.h>
34 #include <sys/ioctl.h>
35 #include <unistd.h>
36 #include <stdio.h>
37 #include <string.h>
38 #include <stdlib.h>
39
40 #define SAMPLE_BUF_SZ 1000
41 #define FS 8000
42 #define MAX_STR 256
43 #define ZT_CHUNKSIZE 8
44
45 /* ioctls for sample */
46
47 #define SAMPLE_SET_CHANNEL 0
48 #define SAMPLE_TX_IMPULSE 1
49
50 int main(int argc, char *argv[]) {
51 int fd, len, i, j, frames;
52 short buf[3*SAMPLE_BUF_SZ];
53 short txbuf[SAMPLE_BUF_SZ];
54 short rxbuf[SAMPLE_BUF_SZ];
55 short ecbuf[SAMPLE_BUF_SZ];
56 FILE *ftx, *frx, *fec;
57 float secs;
58 int sample_ch;
59 char filename[MAX_STR];
60 short *pbuf, *ptxbuf, *prxbuf, *pecbuf;
61
62 if (argc < 4) {
63 printf("usage: %s SampleName channel(1|2|.....) length(secs)\n"
64 " [-i(impulse mode)]",
65 argv[0]);
66 exit(0);
67 }
68
69 sprintf(filename, "%s_tx.raw", argv[1]);
70 ftx = fopen(filename,"wb");
71 if (ftx == NULL) {
72 printf("Can't open tx sample file: %s\n", filename);
73 exit(1);
74 }
75
76 sprintf(filename, "%s_rx.raw", argv[1]);
77 frx = fopen(filename,"wb");
78 if (frx == NULL) {
79 printf("Can't open rx sample file: %s\n", filename);
80 exit(1);
81 }
82
83 sprintf(filename, "%s_ec.raw", argv[1]);
84 fec = fopen(filename,"wb");
85 if (frx == NULL) {
86 printf("Can't open ec sample file: %s\n", filename);
87 exit(1);
88 }
89
90 sample_ch = atoi(argv[2]);
91 if (sample_ch < 1) {
92 printf("Invalid channel: %d must be > 0\n", sample_ch);
93 exit(1);
94 }
95
96 secs = atof(argv[3]);
97 if ((secs < 0.0) || (secs > 100.0)) {
98 printf("Invalid secs %f, must be between 0 and 100\n", secs);
99 exit(1);
100 }
101 frames = (secs*FS)/SAMPLE_BUF_SZ;
102
103 fd = open("/dev/sample", O_RDWR);
104 if( fd == -1) {
105 printf("open error...\n");
106 exit(0);
107 }
108
109 ioctl(fd, SAMPLE_SET_CHANNEL, &sample_ch);
110
111 if (argc == 5) {
112 if(!strcmp(argv[4], "-i")) {
113 printf("Impulse mode enabled\n");
114 ioctl(fd, SAMPLE_TX_IMPULSE, &sample_ch);
115 }
116 }
117
118 printf("sampling Zap/%d...\n", sample_ch);
119 for(i=0; i<frames; i++) {
120 len = read(fd, buf, 3*sizeof(short)*SAMPLE_BUF_SZ);
121 if( len == -1 ) {
122 printf("read error...\n");
123 exit(1);
124 }
125
126 /* demultiplex and write to disk */
127
128 pbuf = buf;
129 ptxbuf = txbuf;
130 prxbuf = rxbuf;
131 pecbuf = ecbuf;
132 for(j=0; j<SAMPLE_BUF_SZ; j++) {
133 *ptxbuf++ = *pbuf++;
134 *prxbuf++ = *pbuf++;
135 *pecbuf++ = *pbuf++;
136 }
137 fwrite(txbuf, sizeof(short), SAMPLE_BUF_SZ, ftx);
138 fwrite(rxbuf, sizeof(short), SAMPLE_BUF_SZ, frx);
139 fwrite(ecbuf, sizeof(short), SAMPLE_BUF_SZ, fec);
140 }
141
142 close(fd);
143 fclose(ftx);
144 fclose(frx);
145 fclose(fec);
146
147 return 0;
148 }

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