On 20.04.19 12:14, Alexander E. Patrakov wrote:
[forgot to CC the list - sorry for any duplicates]
сб, 20 апр. 2019 г. в 14:39, Georg Chini <georg@xxxxxxxx>:
I think using malloc() when a parameter changes is not interfering
with real-time operation because the filter must be reset after
a parameter change anyway.
The parameter changes allowed during the runtime are not expected to
need a filter reset. In-place rebuild - yes, reset - no. The filtered
audio should smoothly follow gradual changes of the filter parameters.
Many LADSPA plugins actually implement internal smoothing of parameter
value changes, or even internally keep two filter versions and
interpolate between them, in order to avoid clicks, because such
gradual changes are an expected thing in pro audio workflows.
Within PA, the filter must at least be rewound when a parameter changes.
Because rewinding is not part of the standard, the best we can do is to
reset the filter in that case by calling deactivate() and activate().
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