[hpsdr] What about Jack?

[John Melton]

Bob,

I have finally found my login password for the hpsdr repository so I 
have imported the current version of my code that I am still working on 
into it to share with you.

It is under trunk/N6LYT/ozy

This has a UDP socket that it listens to for commands to set the control 
bytes and the frequency.  It also has some code to collect the 4096 
samples that can be used to implement a bandscope.  This data is sent as 
a UDP packet to any clients that are interested in processing it.  I 
have some Java code that simply takes the samples, runs them through a 
FFT and then calculates the power in each bin and displays it for the 
complete 0-55MHz range.

Feel free to play with this and let me know if you find anything 
interesting ;-)

I am waiting on a new version of the Ozy code from Phil to complete some 
changes to handle the 2 USB ouput endpoints.

Regards,

-- John g0orx/n6lyt


On 01/27/09 12:04, Bob Campbell wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> Hi All,
> 
> I will come out of lurking mode to pose a couple of questions to the
> list.  Currently I am re-visiting my Ozy-Janus code and testing the
> Ozy/Merc/Penny combination.  I have also committed the sin of making a
> number of changes at once.
> 
> I have some new hardware so I decided to move to Ubuntu 8.1 from Fedora.
> Not a big jump but enough to put me out of my comfort zone.
> 
> So to the point of interest to the net.  I noticed the installed version
> of Jack was Ver 0.109.  Now I had been using jack 0.103 for the original
> code, and I find some of the calls to the API no longer function.  No
> real problem I just need to read the doc more carefully.  I see on the
> web site that 0.116 has been released.  Now my question to the net is
> what will be the version of choice in the near future?
> 
> To the visionaries on the net.  Will jack still be the prefered
> transport medium?  If so will jack still sit in all the signal paths
> currently in use, ie in front and back of Dttsp and in the audio in and
> out and control streams?  Maybe only some of the above?
> 
> There seem to be some questions raised over the viability of jack when
> using two synchronous Jack, and Ozy/Penny/Merc systems are connected.  I
> think John M has some concerns here.  Now currently I am trying to set
> up some test platforms to check this out in the practical world, but
> what do our more academic friends think of this problem or "no worries
> mate" situation. 
> 
> That's my two bits for the moment so I will pop back down under and read
> with great interest.
> 
> 73's
> Bob
> Vk4xv
> 
> 
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