I'm not a fan of Hungarian notation, but C++ kind of needs it with its
implicit `this`. And of all the common options for this, I find
suffixing members with an underscore the least offensive one.
We accidentally reverted a little bit too much code in
762e622416. This didn't appear any sooner
because plugins are supposed to call `IPlugFrame::resizeView()` during
`IPlugView::attached()`, so this only affects plugins that don't confirm
to the spec.
This reverts commit ff76e482f2.
This was a workaround for a race condition in Nimble Kick when opening
the editor while the plugin has not yet been authorized (a Win32 timer
proc between `IEditController::createView()` and `IPlugView::attached()`
would cause a stack overflow because the plugin doesn't check if the
things it wants to use have actually been initialized yet).
But as it turns out, Bitwig Studio now calls
`IEditController::createView()` unconditionally when loading a VST3
plugin, regardless of whether the user wants to open the editor or not.
So this workaround would cause the message loop to be stalled
indefinitely until you open the editor. Since this would also cause
Nimble Kick to break in the Windows version of Bitwig, we'll simply
revert this workaround. If you need to activate the plugin on Linux, you
can load it in the Windows version of REAPER running under Wine instead.
After that the plugin will work just fine under yabridge.
This should in theory prevent Nimble Kick from triggering a stack
overflow when the event loop timer procs before `IPlugView::attached()`
gets called and the plugin hasn't been registered yet. I haven't seen
any other VST3 plugins trigger a race condition here.
This is super difficult to trigger on purpose, but I did run into it at
least once just now so it seems like a good idea to at least make sure
that this doesn't happen.
REAPER initializes the plugin's editor first before reparenting the
parent window to the FX window, so our `topmost_window` didn't actually
refer to the FX window.
This is needed as a workaround to support Waves VST3 plugins.
Right now does does not actually fix the issue because the arguments are
not updated in the subclasses. The next commit will fix this.
Seems weird to need this specifically so we can use the map overload
that creates a new instance when the key doesn't exist in the map. This
seems safer.
The sizes were wrong, and Blue Cat Audio's VST3 plugins seem to use the
upper bits to store the channel configuration, which thus got read out
incorrectly.
In the same way as 50c25c1cf0 did it for
VST2 plugins. Input and output audio data is now stored in a shared
memory buffer instead of being sent over the sockets. This reduces the
bridging overhead to a minimum since copying data was the most expensive
operation we were doing and we now only need to copy the entire buffer
once per processing cycle.
On the Wine side. Instead of always having it enabled and disabling it
when it could potentially hurt (i.e. when handling GUI related things),
we'll now only enable it when it's potentially beneficial. This way we
don't have to constantly switch scheduling policies on the GUI thread.
This does what we did for a few functions in the last few commits for
every function. We now use either the `std::invocable` concept or our
own `invocable_returning` concept wherever possible to make sure we pass
function types to these template functions, since constraint errors are
a lot more readable than template deduction errors. And instead of
having to specify the return type as a template argument, we now just
use `std::invoke_result_t<F>` instead. The VST3 message handling
functions are still using the good old `typename F` since those are
overloaded polymorphic functions. This was also a good moment to modify
`AdHocSocketHandler::send()` to allow functions returning void (this got
rid of an old fixme where we had to return some dummy value from a
function instead of just not returning anything).
This is very ugly so hopefully I can think of a neater way, but now the
response object is just a set of pointers, so we can avoid all copies
and moves on the Wine side.
We do this by using this new `MessageReference<T>` type to avoid copying
our `YaAudioProcessor::Process` struct and the contained `YaProcessData`
object. This is only part of the work, but this redesign lets us keep
the these objects alive on both the plugin and the host side. On the
plugin side, we'll simply serialize the data from the referred to object
without copying it. On the Wine side, we'll write the data to a
persistent thread local object, and then reassign the
`MessageReference<T>` to point to that object. This lets us serialize
'references', thus avoiding potentially expensive allocations. With
these last few changes alone VST3 plugins are already at the same
performance level as our optimized VST2 plugin groups.
The VST3 version of Voxengo TEOTE would deadlock in Ardour when Ardour
calls `IEditController::setState()`, the plugin calls
`IUnitHandler::notifyProgramListChange()` in response, and then when
Ardour calls `IUnitInfo::getProgramName()` while handling that callback.
All of these functions have to be called from the same thread in Voxengo
plugins.
Those DAWs would immediately call `IEditController::performEdit()` with
the same parameter change the plugin has just announced, which would
result in a deadlock. Hopefully this helps with #100.
This greatly improves compatibility with VST3 plugins in Ardour and
Mixbus. Most notably the FabFilter plugins would previously freeze when
having the GUI open while duplicating or inserting new instances.
I haven't seen this cause any issues this way, and I could imagine that
this could cause some hangs when initializing a second instance of a
plugin while you're interacting with the GUI of the first instance.
Robbert van der Helm