Re: how to make stream demux block in python

[Jeff Long]

Right, it's not in 3.8. Here's the implementation in C++ for more recent versions. You could translate this to Python if you want. Note that it's a block (not a sync block) so you implement general_work() rather than work().

https://github.com/gnuradio/gnuradio/blob/main/gr-blocks/lib/stream_demux_impl.cc

On Sun, Dec 11, 2022 at 8:24 AM Sumit Agrawal (P19EE207) <agrawal.15@iitj.ac.in> wrote:

Hi Jeff,

I can't see any stream demux block in gnu radio 3.8. 

Yes, I need specifically in Python

----
Thanks & Regards,
Sumit Kumar Agrawal,
Ph.D. (Electrical Engineering)
Indian Institute of Technology,
Jodhpur, Rajasthan-342037
Mobile No. +91-8410957412

On Sun, 11 Dec, 2022, 5:56 pm Jeff Long, <willcode4@gmail.com> wrote:

There is a built-in Stream Demux block you could use. Do you specifically need it to be in Python?

On Sun, Dec 11, 2022 at 1:33 AM Sumit Agrawal (P19EE207) <agrawal.15@iitj.ac.in> wrote:

Hi everyone, 

Can anyone tell me how to make a stream demuxing block to demultiplex one stream into N output streams?

Demuxes a stream producing N outputs streams that contain n_0 items in the first stream, n_1 items in the second, etc., and repeats. Tags are propagated. The number of items in each output stream is specified using the lengths parameter like so [n_0, n_1, ..., n_N-1].

Example:
lengths = [2,3,4,5]

input stream = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, ...]
output_stream_0 = [0, 1, 14, 15, ...]
output_stream_1 = [2, 3, 4, 16, ...]
output_stream_2 = [5, 6, 7, 8, ...]

output_stream_2 = [9, 10, 11, 12, 13 ...]

--

Thanks & Regards,
Sumit Kumar Agrawal
Ph.D. (Electrical Engineering)
Indian Institute of Technology
Jodhpur, Rajasthan-342037

Mob. No.- 8410957412

ᐧ