> On 1 Sep 2019, at 19:20, jean-michel.fri...@femto-st.fr wrote:
>
>> pybombs prefix init ~/gnuradio -R gnuradio-default
>
> gnuradio-default.lwr recipe is 3.7. Edit the recipe in
> .pybombs/recipes/gr-recipes
> and replace gnuradio with (in order to call gnuradio38.lwr)
> depends:
>-
Hi Kevin,
Thanks for the explanation, I think my flawed understading was due to
the fact of having a file source with a throttle block, and seeing
samples being dropped from buffers that did not match ASCII bytes lost
at the file source but somewhere along the way. Is it correct to
presume that in
Hi Adrian - If you use a file source with a throttle, then that section of
your flowgraph will not drop samples. Using what Kevin wrote: The file
source will "work" as fast as possible, so its output buffer will fill up
quickly and any time samples are removed from it & so long as there is file
dat
Hi Albin,
one of my students reported a little oddity about `-ffast-math`. Assume
you want to set a float to -0, i.e. set the sign bit only. In this case
`-ffast-math` seems to remove the sign bit.
In VOLK this might be an issue with `_mm256_conjugate_ps` in
`include/volk/volk_avx_intrinsics.h
ffast-math disables signed zero by design I think...
I'm particularly interested in problems of numeric stability and loss of
dynamic range.
--Albin
On Mon, Sep 2, 2019, 15:27 Johannes Demel wrote:
> Hi Albin,
>
> one of my students reported a little oddity about `-ffast-math`. Assume
> you w
-ffast-math is allowed to reorder calculations, e.g. it can do
a*f + b*f + c*f as (a+b+c)*f (or vice versa)
which of course isn't necessarily the same result, and can lead to
numerical instability.
The problem is really that for some kernels, things like zero-signage
and NaN / Inf handling / r
I second what Michael wrote, but I'd like to be more general:
GNU Radio does NOT drop samples, anywhere. SDR or audio or similar
analog/digital hardware might do that when buffers run over.
There's a long-standing, and seemingly unfixable bug in the
packet_encoder/decoder Python hier blocks that
Thank you all for your comments.
Marcus, I'd just like to say that I have been using the packet encoder/decoder
for a long time (3-4 years) and could not see any issues that could be
attributed to it.
Regarding the dropped samples, is it the case that the buffers are continuously
grown as the s
Hi Barry,
On 02/09/2019 12.12, Barry Scott wrote:
>
>
>> On 1 Sep 2019, at 19:20, jean-michel.fri...@femto-st.fr wrote:
>>
>>> pybombs prefix init ~/gnuradio -R gnuradio-default
>>
>> gnuradio-default.lwr recipe is 3.7. Edit the recipe in
>> .pybombs/recipes/gr-recipes
>> and replace gnuradio w
The subject pretty-much says it all.
I'm looking for a Python example of code that uses the 'current_tags'
function for the Tag Debug block, and picks apart the resulting tag(s).
In Python land are the tags just a tuple/list or a dictionary? I've
snarfled through the generated SWIG code, and
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