Thanks David,
This line should be at line 1960 in freedv_api.c:
if (f->mode == FREEDV_MODE_700D) {
freedv_comprx_700d(f, rx_fdm, &valid);
as the function freedv_comprx_700d() needs a Complex input and
it's just been generated in rx_fdm[].
I need to think about "nin" if I call the demod twice noting I haven't
called audio Rx yet.
Here is "top" from the Banana Pi:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
18622 alanb 20 0 27396 8004 6744 S 20.0 0.8 10:53.97 parrot
Not too busy.
I'll impliment the above, use freedv_codecrx(), next week sometime.
An engagement party in Perth.
MRFE6S9160
Alan VK2ZIW
On Thu, 5 Jul 2018 06:02:45 +0930, David Rowe wrote
> Hello Alan,
>
> Well done.
>
> I think Jeroen added the general functionality you want with
> functions like freedv_codecrx(). freedv_rx has an example of using
> this function.
>
> However looking at freedv_api.c, freedv_codecrx() doesn't appear to
> support the 700D demodulator yet, I think it just needs something like:
>
> if (f->mode == FREEDV_MODE_700D) {
> nout = freedv_comprx_700d(f, demod_in, &valid);
> }
>
> Cheers,
>
> David
>
> On 04/07/18 16:55, Alan Beard wrote:
> > Hi all,
> >
> > I'm no c++ programmer but with the aid or the "system("do shell")"
> > function, I have modified the freeBeacon code and it's up running.
> >
> > I now need to read the FreeDV api to find if there's a way to capture
> > the ofdm decoded data during reception.
> > At present, after the radio audio is captured, I decode it with
> > "ofdm_decode"
> > and regenerate Tx audio with "ofdm_mod". Then convert that to a 16bit WAV
file.
> > This decode and encode regenerates a "perfect" Tx audio. Looks beautiful
> > on the spectrum display of FreeDV GUI. Though when played with "aplay" on
> > this here Linux box's motherboard audio sounds glitchy.
> >
> > All this is running on my Pi with a 120Gb SSD.
> >
> > 14236KHz is a bit busy here with SSB traffic. 14150 and 14153 are beset with
> > switchmode hash. 7177 is often even worse with S9 hash from the Optus HFC
> > cable box.
> >
> > === Living in the suburbs ===
> >
> > MRFE6S9160 Can I ask who has ever used a 73 valve in ham radio?
> >
> > Alan VK2ZIW
> >
> >
> >
> >
> > On Fri, 29 Jun 2018 17:27:37 +0930, David Rowe wrote
> >> Hello Alan,
> >>
> >>> I tried:
> >>> ./build1/src/c2enc 700D ./wav/vk5qi.wav /tmp/test2.tst --bitsperchar
> >>>
> >>> Only to find mode 700D is not in "c2enc".
> >>
> >> Yes the nomenclature is a bit confusing. Codec 2 has various modes that
> >> don't always map directly to FreeDV waveforms with similar names. So
> >> FreeDV 1600 uses Codec 2 1300 and FreeDV 700D uses Codec 2 700C.
> >>
> >> So you want something like:
> >>
> >> $ ./build1/src/c2enc 700C ./wav/vk5qi.wav /tmp/test2.tst --bitsperchar
> >>
> >>> I think I'm ready to write a Repeater script. Anybody have any thoughts?
> >>
> >> You might need a C application to handle things like a state machine
> >> for loss of sync, but see how you go with a script. The FreeDV
> >> beacon C code would be very close to what you need for a parrot repeater.
> >>
> >>> Notes/Corrections:
> >>>
> >>> README_fdmdv.txt mentions "src/fdmdv.h" that is perhaps "src/fdmdv_api.h"
> >>
> >> Thanks
> >>
> >>> ./cohpsk_ch Can't find slow fading file:
> >>> ../../raw/slow_fading_samples.float
> >>
> >> When cohpsk_ch chokes it prints out instructions on how to generate this
> >> file (if not present) with some Octave commands. Also see
> >> cohpsk_ch.c source.
> >>
> >>> I haven't yet found a way to command line play a 700D "raw" file. This
> >>> I'd like for monitoring:
> >>
> >> $ ./freedv_rx 700D test.raw - | aplay -f S16
> >>
> >> Many examples in README_ofdm.txt
> >>
> >> - David
> >>
> >>
------------------------------------------------------------------------------
> >> Check out the vibrant tech community on one of the world's most
> >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
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> >> Freetel-codec2@lists.sourceforge.net
> >> https://lists.sourceforge.net/lists/listinfo/freetel-codec2
> >
> >
> > Alan
> >
> > Evil flourishes when good men do nothing.
> > Consider the Christmas child.
> > ---------------------------------------------------------------------------
> > Alan Beard Unix Support Technician from 1984 to today
> > 70 Wedmore Rd. Sun Solaris, AIX, HP/UX, Linux, SCO, MIPS
> > Emu Heights N.S.W. 2750 Routers, terminal servers, printers, terminals
> > etc..
> > +61 2 47353013 (h) Support Programming, shell scripting, "C",
> > assembler
> > 0414 353013 (mobile) After uni, electronics tech
> >
> >
> > ------------------------------------------------------------------------------
> > Check out the vibrant tech community on one of the world's most
> > engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> > _______________________________________________
> > Freetel-codec2 mailing list
> > Freetel-codec2@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/freetel-codec2
> >
>
> ------------------------------------------------------------------------------
> Check out the vibrant tech community on one of the world's most
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Alan
Evil flourishes when good men do nothing.
Consider the Christmas child.
---------------------------------------------------------------------------
Alan Beard Unix Support Technician from 1984 to today
70 Wedmore Rd. Sun Solaris, AIX, HP/UX, Linux, SCO, MIPS
Emu Heights N.S.W. 2750 Routers, terminal servers, printers, terminals etc..
+61 2 47353013 (h) Support Programming, shell scripting, "C", assembler
0414 353013 (mobile) After uni, electronics tech
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
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