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

[Marcus Müller]

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,
Marcus

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.

Regards

luikn

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio