>----Messaggio originale---- >Da: trondeau1...@gmail.com >Data: 25-feb-2010 15.57 >A: "elettra.p...@libero.it"<elettra.p...@libero.it> >Cc: <discuss-gnuradio@gnu.org> >Ogg: Re: [Discuss-gnuradio] Question about inputs and outputs of a block > >On Thu, Feb 25, 2010 at 9:26 AM, elettra.p...@libero.it ><elettra.p...@libero.it> wrote: >> Hi all, >> >> I'd like to know if it's possible to create a block with two inputs (or two >> outputs) having different sizes. >> For example, a block that takes a vector of N numbers on one of its two inputs >> and a stream (a vector which has only one element) on the other input. >> I already tried to create a block with these characteristics, but I failed. >> Please tell me if this is possible. >> >> Best Regards, >> >> Elettra. > >Yes, this is possible (in C++ blocks). You will make the IO signature >using "gr_make_io_signature2", which takes the standard (min inputs, >max inputs) as the first two arguments and the next two arguments are >the item sizes for the different inputs/outputs. You can also use >"gr_make_io_signature3" or "gr_make_io_signaturev", which takes a >vector for the signature to have different stream sizes for any number >of ports. > >We used this extensively in the OFDM code. For example, in >gr_ofdm_sampler, on the input, we take in a stream of complex values >on input 0 and a stream of characters (that act as flags) on input 1. >The IO signature looks like: > >gr_make_io_signature2 (2, 2, sizeof (gr_complex), sizeof(char)) > > >Tom >
Thank you Tom, but probably I have not expressed correctly. I'd like to create a block that takes as first input a vector of N float and as second input only one float. Is it possible? Elettra _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
