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add direct sampling to rtl_sdr

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rtlsdrblog 2023-08-24 23:15:45 +12:00
parent 3662ef4324
commit f3673e7df0
2 changed files with 12 additions and 3 deletions
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12
src/rtl_sdr.c
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@ -55,6 +55,7 @@ void usage(void)
"\t[-b output_block_size (default: 16 * 16384)]\n" "\t[-b output_block_size (default: 16 * 16384)]\n"
"\t[-n number of samples to read (default: 0, infinite)]\n" "\t[-n number of samples to read (default: 0, infinite)]\n"
"\t[-S force sync output (default: async)]\n" "\t[-S force sync output (default: async)]\n"
"\t[-D enable direct sampling (default: off)]\n"
"\tfilename (a '-' dumps samples to stdout)\n\n"); "\tfilename (a '-' dumps samples to stdout)\n\n");
exit(1); exit(1);
} }
@ -113,6 +114,7 @@ int main(int argc, char **argv)
int r, opt; int r, opt;
int gain = 0; int gain = 0;
int ppm_error = 0; int ppm_error = 0;
int direct_sampling = 0;
int sync_mode = 0; int sync_mode = 0;
FILE *file; FILE *file;
uint8_t *buffer; uint8_t *buffer;
@ -122,7 +124,7 @@ int main(int argc, char **argv)
uint32_t samp_rate = DEFAULT_SAMPLE_RATE; uint32_t samp_rate = DEFAULT_SAMPLE_RATE;
uint32_t out_block_size = DEFAULT_BUF_LENGTH; uint32_t out_block_size = DEFAULT_BUF_LENGTH;
while ((opt = getopt(argc, argv, "d:f:g:s:b:n:p:S")) != -1) { while ((opt = getopt(argc, argv, "d:f:g:s:b:n:p:SD")) != -1) {
switch (opt) { switch (opt) {
case 'd': case 'd':
dev_index = verbose_device_search(optarg); dev_index = verbose_device_search(optarg);
@ -149,6 +151,9 @@ int main(int argc, char **argv)
case 'S': case 'S':
sync_mode = 1; sync_mode = 1;
break; break;
case 'D':
direct_sampling = 1;
break;
default: default:
usage(); usage();
break; break;
@ -198,6 +203,11 @@ int main(int argc, char **argv)
#else #else
SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE ); SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE );
#endif #endif
/* Set direct sampling */
if (direct_sampling)
verbose_direct_sampling(dev, 2);
/* Set the sample rate */ /* Set the sample rate */
verbose_set_sample_rate(dev, samp_rate); verbose_set_sample_rate(dev, samp_rate);

3
src/rtl_tcp.c
View File

@ -488,9 +488,8 @@ int main(int argc, char **argv)
#endif #endif
/* Set direct sampling */ /* Set direct sampling */
if (direct_sampling) { if (direct_sampling)
verbose_direct_sampling(dev, 2); verbose_direct_sampling(dev, 2);
}
/* Set the tuner error */ /* Set the tuner error */
verbose_ppm_set(dev, ppm_error); verbose_ppm_set(dev, ppm_error);