Stefan, Consider wrapping the blocks you want to switch in/out in a hier block. Use the setter functions of the hier block parameters to: 1. lock the flow graph 2. swap in/out the null sink(s) [1] 3. unlock the flowgraph
[1] https://gnuradio.org/doc/doxygen/classgr_1_1blocks_1_1null__sink.html Respectfully, Blake Sent from my iPhone > On Nov 4, 2017, at 7:13 PM, Stefan Oltmanns <stefan-oltma...@gmx.net> wrote: > > Hello, > > I've got a flowgraph with one source that will end in several sinks. Not > all paths of the flowgraph are needed all the time and I would like to > enable/disable a path without stopping the flowgraph to reduce processor > load. > When I leave a path unconnected by default the application will crash. > I've seen there is a (deprecated) Valve block implemented in Python, but > I'm all C++. > > Is there a solution in C++? > If there is not, I could probably write a custom block that could either > just return 0 from work function or copy all data from input to output, > but I don't like the idea of copying the data, is there a way to just > handover the pointer? > > Best regards > Stefan > >
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