support Gnuradio for v3.9.0

[sergiomb2]

gr-dab FTBFS with fedora rawhide , seems is the same problem of

drmpeg/gr-dvbs2rx#10
drmpeg/gr-dvbs2#7

[yarda]

Gnuradio 3.9 is stable. It drops swig and uses pybind, so OOTs needs some changes. There is porting guide https://wiki.gnuradio.org/index.php/GNU_Radio_3.9_OOT_Module_Porting_Guide

We are trying to rebase gnuradio to 3.9 in Fedora Rawhide. I could try to do some preliminary port.

[yarda]

We used the following patch in Fedora / RPM Fusion downstream:
https://pkgs.rpmfusion.org/cgit/free/gr-dab.git/tree/gr-dab-0.4-gnuradio39.patch
It's untested and without any warranty. Todo: Fix naming (dab vs grdab) - we workaround it dirty way by using symlinks. Also fix QA tests.

[elafargue]

Working on the fix right now, standardizing on grdab as the module name everywhere. Note that Gnuradio 3.9 has changed quite a few APIs as well, so there will be a need to fix a couple of calls like this one:

self.conv_decode = trellis.viterbi_combined_fb(self.fsm, 774, 0, 0, 4, table, trellis.TRELLIS_EUCLIDEAN)
AttributeError: module 'gnuradio.trellis' has no attribute 'viterbi_combined_fb'

If someone is interested to help, I can push my current changes to github to collaborate, let me know

See https://github.com/elafargue/gr-dab/commits/maint-3.9 for my work so far