Re: [Discuss-gnuradio] C++ block that generate extra data

I think you should tell it in the constructor.
like this:

#define NR_OF_WORDS_ADDITIONALLY_NEEDED 4

my_usrp_rx_tx::my_usrp_rx_tx(void) : gr_block("my_usrp_rx_tx",
gr_make_io_signature(1, 1, sizeof(short)),
gr_make_io_signature(1, 1, sizeof(short)))
{
set_output_multiple(NR_OF_WORDS_ADDITIONALLY_NEEDED);
}

Then in general work function, for example, you can increment "manually" 4
words before your out buffer will say "bang".

Patrik

----- Original Message -----
From: "Mattia Rizzi" <mattia.rizzi@gmail.com>
To: "gnu radio" <discuss-gnuradio@gnu.org>
Sent: Thursday, September 29, 2011 19:04
Subject: Re: [Discuss-gnuradio] C++ block that generate extra data

> Thank you for the reply.
> How can i reallocate the output buffer if is too small?
> Let's assume that my block has an input itemsize of 3 byte and an output
> itemsize of 4 byte. Forecast with 1:1.
> If the scheduler keeps to give to my block only 4 bytes for output, how
> can i force to give me more?
> Thanks
>
> -----Messaggio originale-----
> From: Martin Braun
> Sent: Thursday, September 29, 2011 4:20 PM
> To: discuss-gnuradio@gnu.org
> Subject: Re: [Discuss-gnuradio] C++ block that generate extra data
>
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