trying somthing

src/pifmrds/control_pipe.c

@@ -47,18 +47,21 @@ int open_control_pipe(char *filename, volatile uint32_t *padreg)
  * Polls the control file (pipe), non-blockingly, and if a command is received,
  * processes it and updates the RDS data.
  */
-int poll_control_pipe() {
+ResultAndArg poll_control_pipe() {
+	ResultAndArg resarg;
 	int res = -1;
 	static char buf[CTL_BUFFER_SIZE];
 
 	char *fifo = fgets(buf, CTL_BUFFER_SIZE, f_ctl);
 
 	if(fifo == NULL) {
-		return res;
+		resarg.res = -1;
+		return resarg;
 	}
 
 	if(strlen(fifo) > 3 && fifo[2] == ' ') {
 		char *arg = fifo+3;
+		resarg.arg = arg;
 		if(arg[strlen(arg)-1] == '\n') arg[strlen(arg)-1] = 0;
 		if(fifo[0] == 'P' && fifo[1] == 'S') {
 			arg[8] = 0;
@@ -109,6 +112,7 @@ int poll_control_pipe() {
 		}
 	} else if(strlen(fifo) > 4 && fifo[3] == ' ') {
 		char *arg = fifo+4;
+		resarg.arg = arg;
 		if(arg[strlen(arg)-1] == '\n') arg[strlen(arg)-1] = 0;
 		if(fifo[0] == 'P' && fifo[1] == 'T' && fifo[2] == 'Y') {
 			int pty = atoi(arg);
@@ -138,8 +142,8 @@ int poll_control_pipe() {
 			res = CONTROL_PIPE_RT_SET;
 		}
 	}
-
-	return res;
+	resarg.res = res;
+	return resarg;
 }
 
 int close_control_pipe() {

src/pifmrds/control_pipe.h

@@ -15,6 +15,11 @@
 #define CONTROL_PIPE_PI_SET 8
 #define CONTROL_PIPE_PWR_SET 9
 
+typedef struct {
+    int res;
+    char arg[70];
+} ResultAndArg;
+
 extern int open_control_pipe(char *filename, volatile uint32_t *padreg);
 extern int close_control_pipe();
-extern int poll_control_pipe();
+extern ResultAndArg poll_control_pipe();

src/pifmrds/pi_fm_rds.cpp

@@ -183,8 +183,11 @@ int tx(uint32_t carrier_freq, char *audio_file, uint16_t pi, char *ps, char *rt,
             }
         }
 
-        if(control_pipe && poll_control_pipe() == CONTROL_PIPE_PS_SET) {
-            varying_ps = 0;
+        if(control_pipe) {
+            ResultAndArg pollResult = poll_control_pipe();
+            if(pollResult.res == CONTROL_PIPE_PS_SET) {
+                varying_ps = 0;
+            }
         }
 
 			if( fm_mpx_get_samples(data, drds, compressor_decay, compressor_attack, compressor_max_gain_recip) < 0 ) {
@@ -226,6 +229,7 @@ int main(int argc, char **argv) {
     float gain = 1;
     int rawSampleRate = 44100;
     int rawChannels = 2;
+    int compressorchanges = 0;
     double preemp = 50e-6; //eu
     int deviation = 75000;
     int alternative_freq[100] = {};
@@ -260,12 +264,15 @@ int main(int argc, char **argv) {
         } else if(strcmp("-compressordecay", arg)==0 && param != NULL) {
             i++;
             compressor_decay = atof(param);
+            compressorchanges = 1;
         } else if(strcmp("-compressorattack", arg)==0 && param != NULL) {
             i++;
             compressor_attack = atof(param);
+            compressorchanges = 1;
         } else if(strcmp("-compressormaxgainrecip", arg)==0 && param != NULL) {
             i++;
             compressor_max_gain_recip = atof(param);
+            compressorchanges = 1;
         } else if(strcmp("-pty", arg)==0 && param != NULL) {
             i++;
             pty = atoi(param);
@@ -345,6 +352,9 @@ int main(int argc, char **argv) {
             "                  [-ps ps_text] [-rt rt_text] [-ctl control_pipe] [-pty program_type] [-raw play raw audio from stdin] [-disablerds] [-af alt freq] [-preemphasis us] [-rawchannels when using the raw option you can change this] [-rawsamplerate same business] [-deviation the deviation, default is 75000, there are 2 predefined other cases: ukf (for old radios such as the UNITRA Jowita), nfm] [-tp] [-ta]\n", arg);
         }
     }
+    if(compressorchanges) {
+        printf("You've changed the compressor settings, just don't set it too low, so the deviation won't go crazy\n");
+    }
     alternative_freq[0] = af_size;
     int FifoSize=DATA_SIZE*2;
     fmmod=new ngfmdmasync(carrier_freq,228000,14,FifoSize, false, gpiopin);