diff --git a/src/wrapper/vst3.rs b/src/wrapper/vst3.rs index 40d17f60..cc6a0075 100644 --- a/src/wrapper/vst3.rs +++ b/src/wrapper/vst3.rs @@ -17,25 +17,80 @@ //! Wrappers for different plugin types. Each wrapper has an entry point macro that you can pass the //! name of a type that implements `Plugin` to. The macro will handle the rest. +use std::marker::PhantomData; +use std::mem; use std::pin::Pin; +// Alias needed for the VST3 attribute macro +use vst3_sys as vst3_com; +use vst3_sys::base::tresult; +use vst3_sys::base::{IPluginFactory, IPluginFactory2, IPluginFactory3}; +use vst3_sys::VST3; + use crate::plugin::Plugin; -pub struct Vst3Wrapper { +pub struct Wrapper { plugin: Pin>, } +// TODO: Implement the rest +// #[VST3(implements(IPluginFactory, IPluginFactory2, IPluginFactory3))] +#[VST3(implements(IPluginFactory))] +pub struct Factory { + /// The type will be used for constructing plugin instances later. + _phantom: PhantomData

, +} + +impl Factory

{ + pub fn new() -> Box { + Self::allocate(PhantomData::default()) + } +} + +impl IPluginFactory for Factory

{ + unsafe fn get_factory_info(&self, info: *mut vst3_sys::base::PFactoryInfo) -> tresult { + todo!() + } + + unsafe fn count_classes(&self) -> i32 { + todo!() + } + + unsafe fn get_class_info(&self, index: i32, info: *mut vst3_sys::base::PClassInfo) -> tresult { + todo!() + } + + unsafe fn create_instance( + &self, + cid: *const vst3_com::IID, + _iid: *const vst3_com::IID, + obj: *mut *mut vst3_com::c_void, + ) -> tresult { + todo!() + } +} + // TODO: Come up with some way to hae Cargo spit out a VST3 module. Is that possible without a // custom per-plugin build script? #[macro_export] macro_rules! nih_export_vst3 { ($plugin_ty:ty) => { + #[no_mangle] + pub extern "system" fn GetPluginFactory() -> *mut ::std::ffi::c_void { + let factory = ::nih_plug::wrapper::vst3::Factory::<$plugin_ty>::new(); + + Box::into_raw(factory) as *mut ::std::ffi::c_void + } + + // We don't need any special initialization logic, so all of these module entry point + // functions just return true all the time + // These two entry points are used on Linux, and they would theoretically also be used on // the BSDs: // https://github.com/steinbergmedia/vst3_public_sdk/blob/c3948deb407bdbff89de8fb6ab8500ea4df9d6d9/source/main/linuxmain.cpp#L47-L52 #[no_mangle] #[cfg(all(target_family = "unix", not(target_os = "macos")))] - pub extern "C" fn ModuleEntry(_lib_handle: *mut std::ffi::c_void) -> bool { + pub extern "C" fn ModuleEntry(_lib_handle: *mut ::std::ffi::c_void) -> bool { true } @@ -49,7 +104,7 @@ macro_rules! nih_export_vst3 { // https://github.com/steinbergmedia/vst3_public_sdk/blob/bc459feee68803346737901471441fd4829ec3f9/source/main/macmain.cpp#L60-L61 #[no_mangle] #[cfg(target_os = "macos")] - pub extern "C" fn bundleEntry(_lib_handle: *mut std::ffi::c_void) -> bool { + pub extern "C" fn bundleEntry(_lib_handle: *mut ::std::ffi::c_void) -> bool { true }