Hi everyone --
I'm running into an odd problem trying to export Mixer info as a
command-line process in a customized version of MuseScore I'm using to
create data for a music visualization project. (I asked this question on
IRC earlier this afternoon; asking again here in case it gets missed there.)
What my code does is get a pointer to the Fluid synth, and use
fluid->get_num_channels() and fluid->get_channel_preset(int) to get the
mixer info. This works as expected, giving the list of presets shown in the
Mixer window.
However, it doesn't work as expected when running in command-line mode
(which I need to process a large number of scores). What I do command-line
mode is first make sure to load the synthesizer state into the synth, via
synti->setState(score->synthesizerState()). (The scores have the loaded
soundfonts saves in the score.)
Given the synth state is loaded from the score, the above calls to
fluid->get_num_channels() and fluid->get_channel_preset(int) should work as
they do in GUI mode. And indeed they do... sometimes.
I'm seeing non-deterministic behavior. Sometimes I get the preset info from
fluid as expected, other times I get 0 as the number of presets. Same
scores, different behavior across multiple runs.
So I'm suspecting some kind of race condition.
NOTE: I do remove the noSeq = true statement in musescore.cpp to make sure
the synth is still created in batch mode -- normally it isn't.
My question: any tips or thoughts on what could be causing this
non-deterministic batch mode behavior? Possible race conditions? Something
to do with the initialization of fluid?
Thanks, Ien
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