osmo-sdr/utils/check_ctr.c @ master
| 1 |
/* utility to check a recorded WAV file in fgpa.test_mode=1 for
|
|---|---|
| 2 |
* discontinuities in the counter increment/decrements */
|
| 3 |
|
| 4 |
#include <stdio.h>
|
| 5 |
#include <stdint.h>
|
| 6 |
#include <unistd.h>
|
| 7 |
#include <fcntl.h>
|
| 8 |
#include <stdlib.h>
|
| 9 |
|
| 10 |
#include <sys/types.h>
|
| 11 |
#include <sys/stat.h>
|
| 12 |
#include <sys/mman.h>
|
| 13 |
|
| 14 |
#define STEP 1
|
| 15 |
|
| 16 |
static int check_continuity(uint16_t *samples, uint32_t size) |
| 17 |
{
|
| 18 |
uint16_t *end = samples + size/sizeof(uint16_t); |
| 19 |
uint16_t *cur; |
| 20 |
int inited = 0; |
| 21 |
uint16_t last_i, last_q; |
| 22 |
|
| 23 |
for (cur = samples; cur < end; cur += 2) { |
| 24 |
if (!inited) { |
| 25 |
last_i = cur[0]; |
| 26 |
last_q = cur[1]; |
| 27 |
printf("initial I=%04x, Q=%04x\n", |
| 28 |
last_i, last_q); |
| 29 |
inited = 1; |
| 30 |
continue; |
| 31 |
}
|
| 32 |
|
| 33 |
if (cur[0] != (uint16_t)(last_i - STEP) || |
| 34 |
cur[1] != (uint16_t)(last_q + STEP)) { |
| 35 |
fprintf(stderr, "Disocntinuity at %u: " |
| 36 |
"I=%04x/%04x Q=%04x/%04x\n", |
| 37 |
cur - samples, last_i, cur[0], |
| 38 |
last_q, cur[1]); |
| 39 |
}
|
| 40 |
|
| 41 |
last_i = cur[0]; |
| 42 |
last_q = cur[1]; |
| 43 |
}
|
| 44 |
|
| 45 |
return 0; |
| 46 |
}
|
| 47 |
|
| 48 |
int main(int argc, char **argv) |
| 49 |
{
|
| 50 |
struct stat st; |
| 51 |
int fd; |
| 52 |
void *map; |
| 53 |
uint16_t *samples; |
| 54 |
|
| 55 |
if (argc < 2) { |
| 56 |
fprintf(stderr, "You have to specify a wave file name\n"); |
| 57 |
exit(2); |
| 58 |
}
|
| 59 |
|
| 60 |
fd = open(argv[1], O_RDONLY); |
| 61 |
if (fd < 0) { |
| 62 |
perror("opening file"); |
| 63 |
exit(2); |
| 64 |
}
|
| 65 |
|
| 66 |
if (fstat(fd, &st) < 0) { |
| 67 |
perror("stat"); |
| 68 |
exit(1); |
| 69 |
}
|
| 70 |
|
| 71 |
map = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0); |
| 72 |
if (!map) { |
| 73 |
perror("mmap"); |
| 74 |
exit(1); |
| 75 |
}
|
| 76 |
|
| 77 |
if (memcmp(map, "RIFF", 4)) { |
| 78 |
fprintf(stderr, "Doeesn't look like a WAV file\n"); |
| 79 |
exit(1); |
| 80 |
}
|
| 81 |
|
| 82 |
samples = (uint16_t *)(map + 0x44); |
| 83 |
check_continuity(samples, st.st_size-0x44); |
| 84 |
|
| 85 |
exit(0); |
| 86 |
}
|
