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rtl_tcp: Extracted some constants out of printf strings

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The help output contained constants that should print values
based on code constants and not be hardcoded into the print strings.
This commit is contained in:
David Neiss 2021-08-17 15:43:44 -04:00 committed by Steve Markgraf
parent 0847e93e08
commit 641c221fab
1 changed files with 19 additions and 14 deletions
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33
src/rtl_tcp.c
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@ -56,6 +56,10 @@ typedef int socklen_t;
#define SOCKET_ERROR -1
#endif
static const char* DEFAULT_PORT_STR = "1234";
static const uint32_t DEFAULT_SAMPLE_RATE_HZ = 2048000;
static const int DEFAULT_MAX_NUM_BUFFERS = 500;
static SOCKET s;
static pthread_t tcp_worker_thread;
@ -83,23 +87,24 @@ static rtlsdr_dev_t *dev = NULL;
static int enable_biastee = 0;
static int global_numq = 0;
static struct llist *ll_buffers = 0;
static int llbuf_num = 500;
static int llbuf_num = DEFAULT_MAX_NUM_BUFFERS;
static volatile int do_exit = 0;
void usage(void)
{
printf("rtl_tcp, an I/Q spectrum server for RTL2832 based DVB-T receivers\n\n"
"Usage:\t[-a listen address]\n"
"\t[-p listen port (default: 1234)]\n"
"\t[-f frequency to tune to [Hz]]\n"
"\t[-g gain (default: 0 for auto)]\n"
"\t[-s samplerate in Hz (default: 2048000 Hz)]\n"
"\t[-b number of buffers (default: 15, set by library)]\n"
"\t[-n max number of linked list buffers to keep (default: 500)]\n"
"\t[-d device index (default: 0)]\n"
"\t[-P ppm_error (default: 0)]\n"
"\t[-T enable bias-T on GPIO PIN 0 (works for rtl-sdr.com v3 dongles)]\n");
printf("rtl_tcp, an I/Q spectrum server for RTL2832 based DVB-T receivers\n\n");
printf("Usage:\t[-a listen address]\n");
printf("\t[-p listen port (default: %s)]\n", DEFAULT_PORT_STR);
printf("\t[-f frequency to tune to [Hz]]\n");
printf("\t[-g gain (default: 0 for auto)]\n");
printf("\t[-s samplerate in Hz (default: %d Hz)]\n", DEFAULT_SAMPLE_RATE_HZ);
printf("\t[-b number of buffers (default: 15, set by library)]\n");
printf("\t[-n max number of linked list buffers to keep (default: %d)]\n", DEFAULT_MAX_NUM_BUFFERS);
printf("\t[-d device index (default: 0)]\n");
printf("\t[-P ppm_error (default: 0)]\n");
printf("\t[-T enable bias-T on GPIO PIN 0 (works for rtl-sdr.com v3 dongles)]\n");
exit(1);
}
@ -374,8 +379,8 @@ int main(int argc, char **argv)
{
int r, opt, i;
char *addr = "127.0.0.1";
char *port = "1234";
uint32_t frequency = 100000000, samp_rate = 2048000;
const char *port = DEFAULT_PORT_STR;
uint32_t frequency = 100000000, samp_rate = DEFAULT_SAMPLE_RATE_HZ;
struct sockaddr_storage local, remote;
struct addrinfo *ai;
struct addrinfo *aiHead;