Re: [Discuss-gnuradio] really need suggestions for operating on big blocks of data

[Eric Blossom]

On Mon, May 28, 2007 at 07:30:08PM +0200, Vincenzo Pellegrini wrote:
> sorry Eric,
> 
> I really haven't found a proper way to operate (actually to do
> interleaving) on blocks of 6048 items of one byte, as requested by the
> standard I'm trying to implement.
> 
> maybe this is because it's not very clear to me which way the function
> work is called at runtime and how the value of noutput_items is
> assigned.
> 
> please, I'm really in need of some help, because what I've written so
> far really seems to produce decent output, but I'm stuck on my
> interleaver block.
> 
> i think that there's somenthing on gnuradio architecture that I have
> misunderstood..
> 
> I hope you can give me some suggestions or point me towards some code
> that already operates on such big blocks...
> 
> thanks
> best regards 
> 
> vincenzo

Vincenzo, 

You may need to write your block based on gr_block, and implement
general_work.  Doing that, you will be able to (have to) manage all
intermediate state yourself.  You should accept the default
output_multiple (which is 1) and accept all available input.  When
you've got a full interleaved block ready for output, produce it,
otherwise produce 0 output, but consume the input, and accrue your
internal interleaver state.

Eric