This is mostly a simple lexical search+replace but the absence of operator< for
std::weak_ptr<T> leads to some complications, particularly with Evoral::Sequence
and ExportPortChannel.
This fixes an issue when changing port-configuration
or toggle strict-i/o of latent multi-out plugins.
`Session::auto_connect_thread_run` can run concurrently
while ports are added/removed from the GUI thread.
The latter invalidates IO::_port PortSet, while
the former thread iterates over ports.
This also changes the IO-Mutex into a RWLock to allow
concurrent access when possible.
Due to rounding (r->position_sample() - start.samples())
can become negative even if (r->position () >= start).
with k = start_division and start_division < 0 this
caused an invalid vector access `layers[j-1][k]`.
This fixes a crash in some plugins (e.g. Auburn Sounds Couture)
when disconnecting all inputs (e.g. moved before a synth).
Previously run was called with numChannels = 0
Even though the plugin refused to be configured that way.
* during drag and trim operations, we use "dragging region" transparency
so you can see the audio data beneath your region(s)
* we already do this for region-end-trim fade drags, which is a special
kind of trim operation, accessed from the 'lower' drag handle
* now we also trigger transparency for regular fade trims.
see discussion at:
https://discourse.ardour.org/t/regions-transparency-in-7-2/108060/31
This enables all channels left of the last connected pin
for each given bus. e.g. when using just the 2nd (right)
input of a given bus, the plugin is configure in stereo
mode, with the 1st (left) input being fed with silence.
VST3 does not have a "right-channel mono" configuration.
It is also preferable to have Ardour do the pin/channel
mapping.
