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Work around vst3-sys not allowing #[cfg()] fields

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This commit is contained in:
Robbert van der Helm 2022-04-20 20:44:07 +02:00
parent 6ae05eb01b
commit 2bc77ed691
1 changed files with 15 additions and 8 deletions
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23
src/wrapper/vst3/view.rs
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@ -11,7 +11,7 @@ use vst3_sys::gui::{IPlugFrame, IPlugView, IPlugViewContentScaleSupport, ViewRec
use vst3_sys::utils::SharedVstPtr;
use vst3_sys::VST3;
use super::inner::WrapperInner;
use super::inner::{Task, WrapperInner};
use super::util::{ObjectPtr, VstPtr};
use crate::plugin::{Editor, ParentWindowHandle, Vst3Plugin};
@ -22,7 +22,6 @@ use vst3_sys as vst3_com;
// NOTE: This should also be used on the BSDs, but vst3-sys exposes these interfaces only for Linux
#[cfg(target_os = "linux")]
use {
super::inner::Task,
crate::event_loop::{EventLoop, MainThreadExecutor, TASK_QUEUE_CAPACITY},
crossbeam::queue::ArrayQueue,
libc,
@ -41,6 +40,13 @@ const VST3_PLATFORM_UIVIEW: &str = "UIView";
#[allow(unused)]
const VST3_PLATFORM_X11_WINDOW: &str = "X11EmbedWindowID";
/// FIXME: vst3-sys does not allow you to conditionally define fields with #[cfg()], so this is a
/// workaround to define the field outside of the struct
#[cfg(target_os = "linux")]
struct RunLoopEventHandlerWrapper<P: Vst3Plugin>(RwLock<Option<Box<RunLoopEventHandler<P>>>>);
#[cfg(not(target_os = "linux"))]
struct RunLoopEventHandlerWrapper<P: Vst3Plugin>(std::marker::PhantomData<P>);
/// The plugin's [`IPlugView`] instance created in [`IEditController::create_view()`] if `P` has an
/// editor. This is managed separately so the lifetime bounds match up.
#[VST3(implements(IPlugView, IPlugViewContentScaleSupport))]
@ -54,8 +60,7 @@ pub(crate) struct WrapperView<P: Vst3Plugin> {
/// Allows handling events events on the host's GUI thread when using Linux. Needed because
/// otherwise REAPER doesn't like us very much. The event handler could be implemented directly
/// on this object but vst3-sys does not let us conditionally implement interfaces.
#[cfg(target_os = "linux")]
run_loop_event_handler: RwLock<Option<Box<RunLoopEventHandler<P>>>>,
run_loop_event_handler: RunLoopEventHandlerWrapper<P>,
/// The DPI scaling factor as passed to the [IPlugViewContentScaleSupport::set_scale_factor()]
/// function. Defaults to 1.0, and will be kept there on macOS. When reporting and handling size
@ -101,7 +106,9 @@ impl<P: Vst3Plugin> WrapperView<P> {
RwLock::new(None),
RwLock::new(None),
#[cfg(target_os = "linux")]
RwLock::new(None),
RunLoopEventHandlerWrapper(RwLock::new(None)),
#[cfg(not(target_os = "linux"))]
RunLoopEventHandlerWrapper(Default::default()),
AtomicF32::new(1.0),
)
}
@ -155,7 +162,7 @@ impl<P: Vst3Plugin> WrapperView<P> {
/// task so it can be run elsewhere.
#[cfg(target_os = "linux")]
pub fn do_maybe_in_run_loop(&self, task: Task) -> Result<(), Task> {
match &*self.run_loop_event_handler.read() {
match &*self.run_loop_event_handler.0.read() {
Some(run_loop) => run_loop.post_task(task),
None => Err(task),
}
@ -413,7 +420,7 @@ impl<P: Vst3Plugin> IPlugView for WrapperView<P> {
// host's GUI thread. REAPER will segfault when we don't do this for resizes.
#[cfg(target_os = "linux")]
{
*self.run_loop_event_handler.write() = frame.cast().map(|run_loop| {
*self.run_loop_event_handler.0.write() = frame.cast().map(|run_loop| {
RunLoopEventHandler::new(self.inner.clone(), VstPtr::from(run_loop))
});
}
@ -422,7 +429,7 @@ impl<P: Vst3Plugin> IPlugView for WrapperView<P> {
None => {
#[cfg(target_os = "linux")]
{
*self.run_loop_event_handler.write() = None;
*self.run_loop_event_handler.0.write() = None;
}
*self.plug_frame.write() = None;
}