mirror/rtl-sdr-blog
1
0
Fork 0
mirror of https://github.com/rtlsdrblog/rtl-sdr-blog.git synced 2024-12-27 03:18:30 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

rtl_fm: osx does not like semaphores

Browse Source 
Signed-off-by: Steve Markgraf <steve@steve-m.de>
This commit is contained in:
Kyle Keen 2013-01-30 17:40:00 -05:00 committed by Steve Markgraf
parent 8d358b44d4
commit ea4dbd242d
2 changed files with 17 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/rtl_adsb.c
View File

@ -37,7 +37,6 @@
#include "getopt/getopt.h"
#endif
#include <semaphore.h>
#include <pthread.h>
#include <libusb.h>
@ -59,7 +58,7 @@
#define BADSAMPLE 255
static pthread_t demod_thread;
static sem_t data_ready;
static pthread_mutex_t data_ready; /* locked when no data available */
static volatile int do_exit = 0;
static rtlsdr_dev_t *dev = NULL;
@ -334,20 +333,18 @@ void messages(uint16_t *buf, int len)
static void rtlsdr_callback(unsigned char *buf, uint32_t len, void *ctx)
{
int dr_val;
if (do_exit) {
return;}
memcpy(buffer, buf, len);
sem_getvalue(&data_ready, &dr_val);
if (dr_val <= 0) {
sem_post(&data_ready);}
pthread_mutex_trylock(&data_ready);
pthread_mutex_unlock(&data_ready);
}
static void *demod_thread_fn(void *arg)
{
int len;
while (!do_exit) {
sem_wait(&data_ready);
pthread_mutex_lock(&data_ready);
len = magnitute(buffer, DEFAULT_BUF_LENGTH);
manchester((uint16_t*)buffer, len);
messages((uint16_t*)buffer, len);
@ -368,7 +365,7 @@ int main(int argc, char **argv)
int device_count;
int ppm_error = 0;
char vendor[256], product[256], serial[256];
sem_init(&data_ready, 0, 0);
pthread_mutex_init(&data_ready, NULL);
squares_precompute();
while ((opt = getopt(argc, argv, "d:g:p:e:Q:VS")) != -1)
@ -507,6 +504,7 @@ int main(int argc, char **argv)
else {
fprintf(stderr, "\nLibrary error %d, exiting...\n", r);}
rtlsdr_cancel_async(dev);
pthread_mutex_destroy(&data_ready);
if (file != stdout) {
fclose(file);}

19
src/rtl_fm.c
View File

@ -3,6 +3,7 @@
* Copyright (C) 2012 by Steve Markgraf <steve@steve-m.de>
* Copyright (C) 2012 by Hoernchen <la@tfc-server.de>
* Copyright (C) 2012 by Kyle Keen <keenerd@gmail.com>
* Copyright (C) 2013 by Elias Oenal <EliasOenal@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -53,7 +54,6 @@
#define round(x) (x > 0.0 ? floor(x + 0.5): ceil(x - 0.5))
#endif
#include <semaphore.h>
#include <pthread.h>
#include <libusb.h>
@ -67,7 +67,8 @@
#define AUTO_GAIN -100
static pthread_t demod_thread;
static sem_t data_ready;
static pthread_mutex_t data_ready; /* locked when no fresh data available */
static pthread_mutex_t data_write; /* locked when r/w buffer */
static int do_exit = 0;
static rtlsdr_dev_t *dev = NULL;
static int lcm_post[17] = {1,1,1,3,1,5,3,7,1,9,5,11,3,13,7,15,1};
@ -579,6 +580,7 @@ void full_demod(struct fm_state *fm)
} else {
low_pass(fm, fm->buf, fm->buf_len);
}
pthread_mutex_unlock(&data_write);
fm->mode_demod(fm);
if (fm->mode_demod == &raw_demod) {
fwrite(fm->signal2, 2, fm->signal2_len, fm->file);
@ -619,25 +621,23 @@ void full_demod(struct fm_state *fm)
static void rtlsdr_callback(unsigned char *buf, uint32_t len, void *ctx)
{
struct fm_state *fm2 = ctx;
int dr_val;
if (do_exit) {
return;}
if (!ctx) {
return;}
pthread_mutex_lock(&data_write);
memcpy(fm2->buf, buf, len);
fm2->buf_len = len;
pthread_mutex_unlock(&data_ready);
/* single threaded uses 25% less CPU? */
/* full_demod(fm2); */
sem_getvalue(&data_ready, &dr_val);
if (dr_val <= 0) {
sem_post(&data_ready);}
}
static void *demod_thread_fn(void *arg)
{
struct fm_state *fm2 = arg;
while (!do_exit) {
sem_wait(&data_ready);
pthread_mutex_lock(&data_ready);
full_demod(fm2);
if (fm2->exit_flag) {
do_exit = 1;
@ -725,7 +725,8 @@ int main(int argc, char **argv)
int ppm_error = 0;
char vendor[256], product[256], serial[256];
fm_init(&fm);
sem_init(&data_ready, 0, 0);
pthread_mutex_init(&data_ready, NULL);
pthread_mutex_init(&data_write, NULL);
while ((opt = getopt(argc, argv, "d:f:g:s:b:l:o:t:r:p:EFA:NWMULRDC")) != -1) {
switch (opt) {
@ -929,6 +930,8 @@ int main(int argc, char **argv)
else {
fprintf(stderr, "\nLibrary error %d, exiting...\n", r);}
rtlsdr_cancel_async(dev);
pthread_mutex_destroy(&data_ready);
pthread_mutex_destroy(&data_write);
if (fm.file != stdout) {
fclose(fm.file);}