Skyrocketing signal level on input of `-inf` dB.

[0x7CFE]

New project with default settings, the only plugin in the rack, a single EMPTY audio track and idle state, i.e. NO playback.

When ladspa plugin is used in Ardour rack it eventually causes signal level to skyrocket and then it just stays like this forever.

tldr:

If I bypass the plugin it does not degrade. So it only happens when the plugin is enabled and fed with data. I am assuming this happens if the plugin is fed with an endless stream of dummy values. Never experienced this on real signal.

From what I seen both, the latest release and custom built versions of the plugin are affected.

[0x7CFE]

Ok. Apparently this happens for me when I use external monitoring in Ardour and disable Auto Input and everything. That way plugin is fed with input of -inf dBs instead of approx. -90 dB which causes the issue. I assume the code near apply_stages does not account for -infs and corresponding SNR value.

If I enable software monitoring and feed real mic data in, everything can work for hours without any hiccups.

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