Hi Marcus, Thanks for the answer to my question. In effective, you have told me that I have likely examined all the “stock” avenues for my issue.
Indeed, I know about the set_tag_propagation_policy from the development of my own blocks. What I was wondering is if there was an existing block that might selectively strip tags, and it looks like I have to (had to, almost done) write my own. As originally mentioned, I created a single source for PDUs that contained tag info in the meta-data that I needed to feed to later blocks, both my own custom blocks and stock GR blocks. The stock blocks passed the tags from my PDU source, but this was not what I needed. I hate to modify an existing block for many reasons (sound, I think), so it seems better to make a new utility block. BTW, I have a few blocks that I am lobbying my employer to allow to be released into the wild; fingers crossed. Thanks, again! Steven Knudsen, Ph.D., P.Eng. www. techconficio.ca www.linkedin.com/in/knudstevenknudsen All the wires are cut, my friends Live beyond the severed ends. Louis MacNeice > Hi Steven, > > what you're witnessing is the automatic tag propagation that's the default > behaviour for GNU Radio blocks. > > In your case, default isn't the right behaviour, as it seems! > > Luckily, that's pretty easy to change: > gr::block::set_tag_propagation_policy() [1]. The default value is > TPP_ALL_TO_ALL (I think we have that documented somewhere, but I can't find > it, which is the approximate equivalent of undocumented). Call > > set_tag_propagation_policy(TPP_DONT); > > in your block's constructor, and you should be fine; however, you'll have to > manually add input stream tags to your output stream if you need to keep them. > > > > Best regards, > > Marcus > > > > [1] > http://gnuradio.org/doc/doxygen/classgr_1_1block.html#a476e218927e426ac88c26431cbf086cd > > <http://gnuradio.org/doc/doxygen/classgr_1_1block.html#a476e218927e426ac88c26431cbf086cd>
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