-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello!
I'm trying to implement an application with GNU Radio Companion that incorporates different branches. For example I have a Wav source and a signal source and I want to switch between them. Or I want to hear the signal at socertain points in the flow graph. The old way was to use a variable chooser, const multipliers for muting of paths and adders. The downside of this system is that all the paths continue to run concurrently. I do not use the muted paths, but they still consume processing power. Now I found the valve block, and the doc says: Connect output to input when valve is closed (not open). I expected the valve to block when input is not connected to output. I thougth the flow graph would starve/block on that path. In consequence the path would not consume processing power. Now it seems - referring to Josh's message from 2010-05-06 [1] - that down the path from the valve indeed starving happens, but the null sink in the valve happily consumes, keeping the producers running. I thought about replacing the null sink with something blocking. This would for sure work with otherwise unconnected sources, like when choosing between different sources. But I'm not sure what happens if the path splits before the valve. Would the blocking be propagated back over the split or be limited to the path with the valve? Maybe I'm just on the wrong track and there is some other simple solution for this problem. Regards Patrick [1] http://article.gmane.org/gmane.comp.gnu.radio.general/26777 - -- -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk0nrBYACgkQ/G6gHctkMa/WtQCfV6z15+BrBgPa12X/WCoCphXt jqUAn0fSxmm94i/OS/FXKa/cC1E0cX8e =Jn5p -----END PGP SIGNATURE----- _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
