Re: [Discuss-gnuradio] A few questions about subclassing gr_block

[Martin Braun (CEL)]

On Fri, May 03, 2013 at 09:08:34AM +0200, Martin Braun (CEL) wrote:
> > Currently I have an implementation of the block, but I am having trouble
> > understanding the relationship between ninput_items and noutput_items.  
> > When I
> > feed the block from a file source consisting of 720 samples, I get 
> > ninput_items
> > [0] = 720 and noutput_items = 512.  Does this value for noutput_items mean I
> > can only consume and copy 512 of the input samples?  And do I need to 
> > implement
> > forecast if I want to output more?
> 
> That depends. Do you *really* want to output more? How many? What if
> your have 1440 items at the input?
> 
> Basically, this is telling you there's space for 512 items in the output
> buffer. If you can use a sync_block, you'll never run into these
> problems, because there's only one value.

Also, there's lots of other functions to control the output buffer size,
e.g. set_output_multiple(), set_min_output_items()...

MB


-- 
Karlsruhe Institute of Technology (KIT)
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