[linux-dvb] Acoustical mode for femon

[linux-dvb] Acoustical mode for femon

[Maximilian Seesslen]

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Hi List,

find attached a patch that adds a "Acoustical mode" to femon.
The monitoring application produces a sound indicating the signal quality. The 
higher the beep the better the signal quality.
This is useful while mounting the antenna for finding the best position without 
having to look at the monitor or without even having a monitor.


--
Maximilian Seeßlen
Ludwigstrasse 9
D-87437 Kempten

+49 831 687 510 2
+49 174 233 644 3
seesslen.net

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[-- Type: text/x-patch, Size: 2612 bytes --]

diff -r dd1b701fcacc util/femon/femon.c
--- a/util/femon/femon.c	Sat Dec 05 22:51:46 2009 +0100
+++ b/util/femon/femon.c	Wed Dec 23 22:17:40 2009 +0100
@@ -42,10 +42,17 @@
 static char *usage_str =
     "\nusage: femon [options]\n"
     "     -H        : human readable output\n"
+    "     -A        : Acoustical mode. A sound indicates the signal quality.\n"
+    "     -r        : If 'Acoustical mode' is active it tells the application\n"
+    "                 is called remotely via ssh. The sound is heard on the 'real'\n"
+    "                 machine but. The user has to be root.\n"
     "     -a number : use given adapter (default 0)\n"
     "     -f number : use given frontend (default 0)\n"
     "     -c number : samples to take (default 0 = infinite)\n\n";
 
+int sleep_time=1000000;
+int acoustical_mode=0;
+int remote=0;
 
 static void usage(void)
 {
@@ -59,6 +66,27 @@
 {
 	struct dvbfe_info fe_info;
 	unsigned int samples = 0;
+	FILE *ttyFile=NULL;
+	
+	// We dont write the "beep"-codes to stdout but to /dev/tty1.
+	// This is neccessary for Thin-Client-Systems or Streaming-Boxes
+	// where the computer does not have a monitor and femon is called via ssh.
+	if(acoustical_mode)
+	{
+	    if(remote)
+	    {
+		ttyFile=fopen("/dev/tty1","w");
+	        if(!ttyFile)
+		{
+		    fprintf(stderr, "Could not open /dev/tty1. No access rights?\n");
+		    exit(-1);
+		}
+	    }
+	    else
+	    {
+		ttyFile=stdout;
+	    }
+	}
 
 	do {
 		if (dvbfe_get_info(fe, FE_STATUS_PARAMS, &fe_info, DVBFE_INFO_QUERYTYPE_IMMEDIATE, 0) != FE_STATUS_PARAMS) {
@@ -94,12 +122,24 @@
 		if (fe_info.lock)
 			printf("FE_HAS_LOCK");
 
+		// create beep if acoustical_mode enabled
+		if(acoustical_mode)
+		{
+		    int signal=(fe_info.signal_strength * 100) / 0xffff;
+		    fprintf( ttyFile, "\033[10;%d]\a", 500+(signal*2));
+		    // printf("Variable : %d\n", signal);
+		    fflush(ttyFile);
+		}
+
 		printf("\n");
 		fflush(stdout);
-		usleep(1000000);
+		usleep(sleep_time);
 		samples++;
 	} while ((!count) || (count-samples));
-
+	
+	if(ttyFile)
+	    fclose(ttyFile);
+	
 	return 0;
 }
 
@@ -148,7 +188,7 @@
 	int human_readable = 0;
 	int opt;
 
-       while ((opt = getopt(argc, argv, "Ha:f:c:")) != -1) {
+       while ((opt = getopt(argc, argv, "rAHa:f:c:")) != -1) {
 		switch (opt)
 		{
 		default:
@@ -166,6 +206,15 @@
 		case 'H':
 			human_readable = 1;
 			break;
+		case 'A':
+			// Acoustical mode: we have to reduce the delay between
+			// checks in order to hear nice sound
+			sleep_time=5000;
+			acoustical_mode=1;
+			break;
+		case 'r':
+			remote=1;
+			break;
 		}
 	}
 

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Re: [linux-dvb] Acoustical mode for femon

[Manu Abraham]

On Thu, Dec 24, 2009 at 1:20 AM, Maximilian Seesslen <mes@seesslen.net> wrote:
> Hi List,
>
> find attached a patch that adds a "Acoustical mode" to femon.
> The monitoring application produces a sound indicating the signal quality. The
> higher the beep the better the signal quality.
> This is useful while mounting the antenna for finding the best position without
> having to look at the monitor or without even having a monitor.

Thanks, applied.

Regards,
Manu

Re: [linux-dvb] Acoustical mode for femon

[VDR User]

On Wed, Dec 23, 2009 at 1:20 PM, Maximilian Seesslen <mes@seesslen.net> wrote:
> Hi List,
>
> find attached a patch that adds a "Acoustical mode" to femon.
> The monitoring application produces a sound indicating the signal quality. The
> higher the beep the better the signal quality.
> This is useful while mounting the antenna for finding the best position without
> having to look at the monitor or without even having a monitor.

Thank you for this!  Very useful since it's hard to be outside aiming
and inside looking at a monitor at the same time.  :)

Re: [linux-dvb] Acoustical mode for femon

[Mika Laitio]

>> The monitoring application produces a sound indicating the signal quality. The
>> higher the beep the better the signal quality.
>> This is useful while mounting the antenna for finding the best position without
>> having to look at the monitor or without even having a monitor.
>
> Thank you for this!  Very useful since it's hard to be outside aiming
> and inside looking at a monitor at the same time.  :)

While I was trying to locate astra on last year by rotating the dish I 
used both the cheap (10 euro) beeper that was but in the satellite cable 
end to find out the abbroximately dish direction. Fine tuning was done by 
starring the laptop screen szap output to find out when it started to 
printout LOCKED output. (I used ssh from the laptop to dvb card computer 
where I had put the channel info for one astra channel and tried to szap 
for that one. That of course meant that I needed the correct channel info 
for one channel in satellite even before I could try to scan channels from 
that satellite...)

Mika