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Clean up interface checks in VST3 plugin factory

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Even though the interface ID is passed as an FIDString and there is a
function to compare FIDStrings obviously doesn't mean that you're
supposed to use them! Duh.
This commit is contained in:
Robbert van der Helm
2021-02-09 23:24:05 +01:00
parent 10b01b5140
commit a91fad2217
1 changed files with 9 additions and 16 deletions
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src/plugin/bridges/vst3-impls/plugin-factory.cpp
+9 -16
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@@ -38,30 +38,23 @@ YaPluginFactoryImpl::createInstance(Steinberg::FIDString cid,
Steinberg::TUID cid_array;
std::copy(cid, cid + std::extent_v<Steinberg::TUID>, cid_array);
// FIXME: `_iid` in Bitwig Studio 3.3.1 is not null terminated, and the
// comparison below will thus fail since the strings have different
// lengths. Since it looks like the module implementation that comes
// with the SDK has this same issue I think it might just be a case
// of Steinberg not following its own specifications.
std::string iid_string(_iid, uid_size);
// I don't think they include a safe way to convert a `FIDString/char*` into
// a `FUID`, so this will have to do
const Steinberg::FUID requested_iid = Steinberg::FUID::fromTUID(
*reinterpret_cast<const Steinberg::TUID*>(&*_iid));
Vst3PluginProxy::Construct::Interface requested_interface;
if (Steinberg::FIDStringsEqual(iid_string.c_str(),
Steinberg::Vst::IComponent::iid)) {
if (requested_iid == Steinberg::Vst::IComponent::iid) {
requested_interface = Vst3PluginProxy::Construct::Interface::IComponent;
} else if (Steinberg::FIDStringsEqual(
iid_string.c_str(), Steinberg::Vst::IEditController::iid)) {
} else if (requested_iid == Steinberg::Vst::IEditController::iid) {
requested_interface =
Vst3PluginProxy::Construct::Interface::IEditController;
} else {
// When the host requests an interface we do not (yet) implement, we'll
// print a recognizable log message. I don't think they include a safe
// way to convert a `FIDString/char*` into a `FUID`, so this will have
// to do.
const Steinberg::FUID uid = Steinberg::FUID::fromTUID(
*reinterpret_cast<const Steinberg::TUID*>(&*_iid));
// print a recognizable log message
bridge.logger.log_query_interface("In IPluginFactory::createInstance()",
Steinberg::kNotImplemented, uid);
Steinberg::kNotImplemented,
requested_iid);
*obj = nullptr;
return Steinberg::kNotImplemented;