>
>
> On Fri, Aug 3, 2012 at 1:56 PM, Martin Braun (CEL) <
address@hidden>
> wrote:
>
>
> On Fri, Aug 03, 2012 at 01:38:38PM -0400, Alexander Olihovik wrote:
> > There are a few cases when input_items[0] doesn't equal input_items[1].
> If say,
> > len(input_items[0]) = 1000 and len(input_items[1]) = 1500, and I returned
> the
> > smaller of the two values, 1000, what would happen to the other 500
> samples on
> > port 1? Would they be buffered somewhere and then used the next time the
> work
> > function is called?
>
>
> Yep. The case where the len(input_items) are different is what you
> should normally prepare for.
>
> Are you *certain* you can't use a gr_sync_{block,decimator,interpolator}?
> That would make stuff much easier for you, I guess. For a start, you
> wouldn't even need to check input_items.
>
> MB
>
>
> >
> >
> > On Wed, Aug 1, 2012 at 8:40 PM, Tom Rondeau <
address@hidden> wrote:
> >
> >
> > On Wed, Aug 1, 2012 at 3:46 PM, Alexander Olihovik <
>
address@hidden>
> > wrote:
> > > Hi all!
> > > I'm writing a custom sink block in Python with multiple input ports
> of
> > all
> > > the same data type.
> > > I've been reading Josh's block coding guide, but I'm confused at
> one
> > point:
> > > The value returned by a block should be the number of items
> produced by
> > that
> > > block.
> > > Is this to say that if I have multiple ports, I may return the
> value of
> > > input_items[0]?
> > > Or is it correct to say that I must return the sum of all
> input_items[i],
> > i
> > > = range(number of input ports)?
> > >
> > >
> > > I would like to create a synchronous block where all ports consume
> and
> > > produce an equal number of items every time the work function is
> called.
> > > However, it appears that there are times when input_items[0] !=
> > > input_items[1] != ... != input_items[numPorts-1]
> > > If I were to return input_items[0], I would assume that this would
> not
> > yield
> > > the results I expect!
> > >
> > > Any help is greatly appreciated!
> > >
> > > From,
> > > Alex
> >
> >
> > If you have a block with multiple input items and you want to produce
> > the same number every time, noutput_items will tell you how much you
> > are capable of producing on every output stream. When you 'return
> > noutput_items', you are saying that you have produced that many items
> > on EVERY stream.
> >
> > There is another way that specifies the same thing. Each block
> > consumes some number of samples on every input stream and produces
> > some number of samples on every output stream. You can individually
> > specify "produce(i, N_i)" and "consume(o, N_o)" on each input and
> > output stream, respectively. In this case i is the input stream and
> > N_i is the number of items consumed on that input stream and o is the
> > output stream and N_o is the number of items consumed on that output
> > stream. When specifying your own 'produce' values, though, make sure
> > to return WORKED_CALLED_PRODUCE, to tell the scheduler that you have
> > done this yourself. But it sounds like you want to produce the same
> > amount on every stream, so you should be fine just using 'return
> > nouput_items'.
> >
> > Tom
> >
> >
> >
> >
> > --
> > Alex Olihovik
> > University of Virginia 2013
> > BS Electrical Engineering
> > BS Computer Engineering
> >
address@hidden
>
>
> > _______________________________________________
> > Discuss-gnuradio mailing list
> >
address@hidden
> >
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
> --
> Karlsruhe Institute of Technology (KIT)
> Communications Engineering Lab (CEL)
>
> Dipl.-Ing. Martin Braun
> Research Associate
>
> Kaiserstraße 12
> Building 05.01
> 76131 Karlsruhe
>
> Phone:
+49 721 608-43790
> Fax:
+49 721 608-46071
>
www.cel.kit.edu
>
> KIT -- University of the State of Baden-Württemberg and
> National Laboratory of the Helmholtz Association
>
> _______________________________________________
> Discuss-gnuradio mailing list
>
address@hidden
>
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
>
>
>
> --
> Alex Olihovik
> University of Virginia 2013
> BS Electrical Engineering
> BS Computer Engineering
>
address@hidden
> _______________________________________________
> Discuss-gnuradio mailing list
>
address@hidden
>
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
--
Karlsruhe Institute of Technology (KIT)
Communications Engineering Lab (CEL)
Dipl.-Ing. Martin Braun
Research Associate
Kaiserstraße 12
Building 05.01
76131 Karlsruhe
Phone:
+49 721 608-43790
Fax:
+49 721 608-46071
www.cel.kit.edu
KIT -- University of the State of Baden-Württemberg and
National Laboratory of the Helmholtz Association