rtl_fm: windows support

Signed-off-by: Steve Markgraf <steve@steve-m.de>

src/CMakeLists.txt

@@ -69,12 +69,8 @@ endif()
 add_executable(rtl_sdr rtl_sdr.c)
 add_executable(rtl_tcp rtl_tcp.c)
 add_executable(rtl_test rtl_test.c)
-set(INSTALL_TARGETS rtlsdr_shared rtlsdr_static rtl_sdr rtl_tcp rtl_test)
-
-if(UNIX)
-LIST(APPEND INSTALL_TARGETS rtl_fm)
 add_executable(rtl_fm rtl_fm.c)
-endif()
+set(INSTALL_TARGETS rtlsdr_shared rtlsdr_static rtl_sdr rtl_tcp rtl_test rtl_fm)
 
 target_link_libraries(rtl_sdr rtlsdr_shared
     ${LIBUSB_LIBRARIES}
@@ -88,12 +84,12 @@ target_link_libraries(rtl_test rtlsdr_shared
     ${LIBUSB_LIBRARIES}
     ${CMAKE_THREAD_LIBS_INIT}
 )
-if(UNIX)
 target_link_libraries(rtl_fm rtlsdr_shared
     ${LIBUSB_LIBRARIES}
     ${CMAKE_THREAD_LIBS_INIT}
-    m
 )
+if(UNIX)
+target_link_libraries(rtl_fm m)
 if(APPLE)
     target_link_libraries(rtl_test m)
 else()
@@ -105,9 +101,11 @@ if(WIN32)
 target_link_libraries(rtl_sdr libgetopt_static)
 target_link_libraries(rtl_tcp libgetopt_static)
 target_link_libraries(rtl_test libgetopt_static)
+target_link_libraries(rtl_fm libgetopt_static)
 set_property(TARGET rtl_sdr APPEND PROPERTY COMPILE_DEFINITIONS "rtlsdr_STATIC" )
 set_property(TARGET rtl_tcp APPEND PROPERTY COMPILE_DEFINITIONS "rtlsdr_STATIC" )
 set_property(TARGET rtl_test APPEND PROPERTY COMPILE_DEFINITIONS "rtlsdr_STATIC" )
+set_property(TARGET rtl_fm APPEND PROPERTY COMPILE_DEFINITIONS "rtlsdr_STATIC" )
 endif()
 ########################################################################
 # Install built library files & utilities

src/rtl_fm.c

@@ -32,6 +32,9 @@
  *       nicer FIR than square
  *       scale squelch to other input parameters
  *       test all the demodulations
+ *       sci notation parsing
+ *       pad output on hop
+ *       nearest gain approx
  */
 
 #include <errno.h>
@@ -45,7 +48,11 @@
 #include <unistd.h>
 #else
 #include <Windows.h>
+#include <fcntl.h>
+#include <io.h>
 #include "getopt/getopt.h"
+#define usleep(x) Sleep(x/1000)
+#define round(x) (x > 0.0 ? floor(x + 0.5): ceil(x - 0.5))
 #endif
 
 #include <semaphore.h>
@@ -120,7 +127,7 @@ void usage(void)
 		"\t[-E sets lower edge tuning (default: center)]\n"
 		"\t[-N enables NBFM mode (default: on)]\n"
 		"\t[-W enables WBFM mode (default: off)]\n"
-		"\t (-N -s 170e3 -o 4 -A -r 16e3 -l 0 -D)\n"
+		"\t (-N -s 170e3 -o 4 -A -r 32e3 -l 0 -D)\n"
 		"\tfilename (a '-' dumps samples to stdout)\n\n"
 		"Experimental options:\n"
 		"\t[-r output rate (default: same as -s)]\n"
@@ -134,8 +141,10 @@ void usage(void)
 		"\t[-F enables high quality FIR (default: off/square)]\n"
 		"\t[-D enables de-emphasis (default: off)]\n"
 		"\t[-A enables high speed arctan (default: off)]\n\n"
-		"Produces signed 16 bit ints, use Sox to hear them.\n"
+		"Produces signed 16 bit ints, use Sox or aplay to hear them.\n"
-		"\trtl_fm ... - | play -t raw -r 24k -e signed-integer -b 16 -c 1 -V1 -\n\n");
+		"\trtl_fm ... - | play -t raw -r 24k -e signed-integer -b 16 -c 1 -V1 -\n"
+		"\t             | aplay -r 24k -f S16_LE -t raw -c 1\n"
+		"\t  -s 22050 - | multimon -t raw /dev/stdin\n\n");
 	exit(1);
 }
 
@@ -539,7 +548,7 @@ static void rtlsdr_callback(unsigned char *buf, uint32_t len, void *ctx)
 	/* single threaded uses 25% less CPU? */
 	/* full_demod(fm2); */
 	sem_getvalue(&data_ready, &dr_val);
-	if (!dr_val) {
+	if (dr_val <= 0) {
 		sem_post(&data_ready);}
 }
 
@@ -634,7 +643,7 @@ int main(int argc, char **argv)
 			wb_mode = 1;
 			fm.mode_demod = &fm_demod;
 			fm.sample_rate = 170000;
-			fm.output_rate = 16000;
+			fm.output_rate = 32000;
 			fm.custom_atan = 1;
 			fm.post_downsample = 4;
 			fm.deemph = 1;
@@ -730,6 +739,9 @@ int main(int argc, char **argv)
 
 	if (strcmp(filename, "-") == 0) { /* Write samples to stdout */
 		fm.file = stdout;
+#ifdef _WIN32
+		_setmode(_fileno(fm.file), _O_BINARY);
+#endif
 	} else {
 		fm.file = fopen(filename, "wb");
 		if (!fm.file) {
@@ -754,8 +766,8 @@ int main(int argc, char **argv)
 		fprintf(stderr, "\nLibrary error %d, exiting...\n", r);}
 	rtlsdr_cancel_async(dev);
 
-	if (fm.file != stdout)
+	if (fm.file != stdout) {
-		fclose(fm.file);
+		fclose(fm.file);}
 
 	rtlsdr_close(dev);
 	free (buffer);