[hpsdr] ghpsdr3 on Windows -- updated

[w3sz]

Hi All,

There is in the ghpsdr3 receiver a bug similar to David's bug #2, where 
if the output audio device is other than '0', frequency updates don't 
get carried out properly.

David's solution for this bug in dspserver led me directly to a quick 
fix for this bug in the ghpsdr3 receiver.

Frequency control when not using audio output device 0 is restored by 
the following:

code in .../src/receiver/ozy.c is changed by eliminating lines 270 and 
276, so that ghpsdr[3] ALWAYS sends audio back to server.

// else {  //w3sz eliminated <<<<<<<<<<<<<<<<<<<<<<
             // send the audio back to the server
 
bytes_written=sendto(audio_socket,output_buffer,sizeof(output_buffer),0,(struct 
sockaddr *)&audio_addr,audio_length);
             if(bytes_written<0) {
                 fprintf(stderr,"sendto audio failed: %d\n",bytes_written);
                 exit(1);
//            }  //w3sz eliminated <<<<<<<<<<<<<<<<<<<<<<<<<<

Once you have done this you can run the receiver with a command like:
./ghpsdr --local-audio 1 or
./ghpsdr --port-audio 1
and still have functioning frequency control.

There is likely a more elegant, efficient way to solve this, but I 
figured I would post this to save others who want to use the receiver 
now some time.  I haven't found any deleterious effects of this change 
thus far.

73,

Roger Rehr
W3SZ


On 08/15/2010 02:10 AM, David McQuate wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> ghpsdr3 server & dspserver have been updated to solve two problems--
> (2) If dspserver for Rx 0 were not started first, the spectrum and
> waterfall displays, and audio output of other receivers would not change
> when their frequency was changed in jmonitor, but everything would be
> correct as soon as dspserver for Rx 0 were started.
> The solution to the second problem lead to a new capability for the
> system. Each dspserver sends its demodulated audio back to server, which
> selects one of those streams to send to Mercury's headphone / speaker
> output.
>
> SVN address--
>
> svn://64.245.179.219/svn/repos_hpsdr_kiss/branches/WA8YWQ/ghpsdr3-Windows
>
> See the file ghpsdr3 on Windows - HowTo.txt for information on running
> this system.

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