[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Discuss-gnuradio] Does the message port propagate tags?

From: Marcus Müller
Subject: Re: [Discuss-gnuradio] Does the message port propagate tags?
Date: Tue, 26 May 2015 22:17:08 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0

Hi Luikn,

Message ports and stream tags are orthogonal concepts: messages don't come in streams, and hence don't carry stream tags.
A tag is always specific to a numbered item, and since message ports are not item-based but meant to transport messages that will cause a handler to be called in the receiving block's thread, there's nothing to "attach" a stream tag to.

Best regards,

On 05/26/2015 08:22 PM, Lucas Rodés wrote:
Hi all,

I've been wondering if a message port propagate the tag that come from a previous input ports. I've been reading about propagation and propagation politics and I was just playing around putting a Tag debug in front of several blocks connected to a USRP source that is generating a rx_time tag.

However, staying with the default "all to all" politic, at some point I was just wondering about the message port, as it doesn't really count as an in/output port at the signatures, and also the "Tag debug" port has no "message" option for the input (maybe for obvious reasons that answer my question) However I would just like to have it clear.

Thank you all in advance.



Discuss-gnuradio mailing list

reply via email to

[Prev in Thread] Current Thread [Next in Thread]