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Replace ComponentInstance with a generic variant

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This allows casting to supported interface from an FUnknown.
This commit is contained in:
Robbert van der Helm
2020-12-17 13:47:43 +01:00
parent d0e96da21a
commit a5834cd438
2 changed files with 66 additions and 59 deletions
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src/wine-host/bridges/vst3.h
+24 -20
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@@ -25,17 +25,17 @@
#include "common.h"
/**
* A holder for an `IComponent` instance created from the factory along with any
* host context proxy objects belonging to it, and several predefined
* `FUnknownPtrs` so we don't have to do these dynamic casts all the times..
*
* TODO: When implementing `IEditController`, change this to use `IPluginBase`
* as the base interface.
* A holder for plugin object instance created from the factory. This stores all
* relevant interface smart pointers to that object so we can handle control
* messages sent by the plugin without having to do these expensive casts all
* the time. This also stores any additional context data, such as the
* `IHostApplication` instance passed to the plugin during
* `IPluginBase::initialize()`.
*/
struct ComponentInstance {
ComponentInstance();
struct PluginObject {
PluginObject();
ComponentInstance(Steinberg::IPtr<Steinberg::Vst::IComponent> component);
PluginObject(Steinberg::IPtr<Steinberg::FUnknown> object);
/**
* If the host passes an `IHostApplication` during
@@ -45,15 +45,16 @@ struct ComponentInstance {
Steinberg::IPtr<YaHostApplication> hsot_application_context;
/**
* The `IComponent` instance we created.
* The base object we cast from.
*/
Steinberg::IPtr<Steinberg::Vst::IComponent> component;
Steinberg::IPtr<Steinberg::FUnknown> object;
// All smart pointers below are created from `component`. They will be null
// pointers if `component` did not implement the interface.
Steinberg::FUnknownPtr<Steinberg::IPluginBase> plugin_base;
Steinberg::FUnknownPtr<Steinberg::Vst::IAudioProcessor> audio_processor;
Steinberg::FUnknownPtr<Steinberg::Vst::IComponent> component;
Steinberg::FUnknownPtr<Steinberg::IPluginBase> plugin_base;
};
/**
@@ -138,12 +139,15 @@ class Vst3Bridge : public HostBridge {
*/
Steinberg::IPtr<YaHostApplication> plugin_factory_host_application_context;
// Below are managed instances we created for
// `IPluginFactory::createInstance()`. The keys in all of these maps are the
// unique identifiers we generated for them so we can identify specific
// instances. The mutexes are used for operations that insert or remove
// items, and not for regular access.
std::map<size_t, ComponentInstance> component_instances;
std::mutex component_instances_mutex;
/**
* These are all the objects we have created through the Windows VST3
* plugins' plugin factory. The keys in all of these maps are the unique
* identifiers we generated for them so we can identify specific instances.
* During the proxy object's destructor (on the plugin side), we'll get a
* request to remove the corresponding plugin object from this map. This
* will cause all pointers to it to get dropped and the object to be cleaned
* up.
*/
std::map<size_t, PluginObject> object_instances;
std::mutex object_instances_mutex;
};