As Seth pointed out such samples is a great model for this proposal is a good time to make that same functionality work with in-tree blocks. The QT sinks mostly accept PDUs already. What's missing is a file source that can output PDUs. Since no one is really using sigmf yet (I think?) it's hard to tell if a capture segment makes sense as a PDU since it could be some unbounded number of samples. Having a file source with fseek-like functionality controlled by async message port makes a lot of sense though. Even better if there could be some introspection to fields in the sigmf file.
I'm currently moving some more in-tree blocks to accept/output PDUs and a file source that gives such samples functions is on the list. Would be great if that comes in through a sigmf GSOC project. On Fri, Mar 24, 2017 at 12:17 PM, Bastian Bloessl <[email protected]> wrote: > Hi Ben, > > On 03/24/2017 05:01 PM, Ben Hilburn wrote: > > > > - I wonder what would be the workflow when creating a SigMF > recording. > > An issue might be that you cannot immediately write the SigMF meta > file > > during recording. (For example, the hash has to be calculated after > the > > recording. Or the annotations have to be written after the capture > > segments.). Did you plan to create the meta data in memory and write > the > > file when the flow graph shuts down (which might cause data loss when > > you experience a segfault) or do you write meta data to disk in an > > intermediate format that you have to post-process manually to create > the > > final SigMF files. > > > > > > So the SigMF spec is designed specifically to enable writing the > > metadata and dataset files in a streaming manner. > > Can annotations and capture segments be interleaved or how is it > possible to write the metadata in a streaming manner? > > Best, > Bastian > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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