Implement IAudioProcessor::canProcessSampleSize()

src/common/logging/vst3.cpp

@@ -167,7 +167,16 @@ void Vst3Logger::log_request(bool is_host_vst,
     log_request_base(is_host_vst, [&](auto& message) {
         message << "<IAudioProcessor* #" << request.instance_id
                 << ">::getBusArrangement(dir = " << request.dir
-                << ", index = " << request.index << ", &arr";
+                << ", index = " << request.index << ", &arr)";
+    });
+}
+
+void Vst3Logger::log_request(bool is_host_vst,
+                             const YaComponent::CanProcessSampleSize& request) {
+    log_request_base(is_host_vst, [&](auto& message) {
+        message << "<IAudioProcessor* #" << request.instance_id
+                << ">::canProcessSampleSize(symbolicSampleSize = "
+                << request.symbolic_sample_size << ")";
     });
 }
 

src/common/logging/vst3.h

@@ -70,6 +70,8 @@ class Vst3Logger {
     void log_request(bool is_host_vst, const YaComponent::GetState&);
     void log_request(bool is_host_vst, const YaComponent::SetBusArrangements&);
     void log_request(bool is_host_vst, const YaComponent::GetBusArrangement&);
+    void log_request(bool is_host_vst,
+                     const YaComponent::CanProcessSampleSize&);
     void log_request(bool is_host_vst, const YaPluginFactory::Construct&);
     void log_request(bool is_host_vst, const YaPluginFactory::SetHostContext&);
     void log_request(bool is_host_vst, const WantsConfiguration&);

src/common/serialization/vst3.h

@@ -71,6 +71,7 @@ using ControlRequest = std::variant<YaComponent::Construct,
                                     YaComponent::GetState,
                                     YaComponent::SetBusArrangements,
                                     YaComponent::GetBusArrangement,
+                                    YaComponent::CanProcessSampleSize,
                                     YaPluginFactory::Construct,
                                     YaPluginFactory::SetHostContext>;
 

src/common/serialization/vst3/component.h

@@ -500,6 +500,26 @@ class YaComponent : public Steinberg::Vst::IComponent,
     getBusArrangement(Steinberg::Vst::BusDirection dir,
                       int32 index,
                       Steinberg::Vst::SpeakerArrangement& arr) override = 0;
+
+    /**
+     * Message to pass through a call to
+     * `IAudioProcessor::canProcessSampleSize(symbolic_sample_size)` to the Wine
+     * plugin host.
+     */
+    struct CanProcessSampleSize {
+        using Response = UniversalTResult;
+
+        native_size_t instance_id;
+
+        int32 symbolic_sample_size;
+
+        template <typename S>
+        void serialize(S& s) {
+            s.value8b(instance_id);
+            s.value4b(symbolic_sample_size);
+        }
+    };
+
     virtual tresult PLUGIN_API
     canProcessSampleSize(int32 symbolicSampleSize) override = 0;
     virtual uint32 PLUGIN_API getLatencySamples() override = 0;

src/plugin/bridges/vst3-impls/component.cpp

@@ -193,9 +193,11 @@ tresult PLUGIN_API YaComponentPluginImpl::getBusArrangement(
 
 tresult PLUGIN_API
 YaComponentPluginImpl::canProcessSampleSize(int32 symbolicSampleSize) {
-    // TODO: Implement
-    bridge.logger.log("TODO: IAudioProcessor::canProcessSampleSize()");
-    return Steinberg::kNotImplemented;
+    return bridge
+        .send_message(YaComponent::CanProcessSampleSize{
+            .instance_id = arguments.instance_id,
+            .symbolic_sample_size = symbolicSampleSize})
+        .native();
 }
 
 uint32 PLUGIN_API YaComponentPluginImpl::getLatencySamples() {

src/wine-host/bridges/vst3.cpp

@@ -169,7 +169,6 @@ void Vst3Bridge::run() {
             },
             [&](YaComponent::SetBusArrangements& request)
                 -> YaComponent::SetBusArrangements::Response {
-                VectorStream stream;
                 return component_instances[request.instance_id]
                     .audio_processor->setBusArrangements(
                         request.inputs.data(), request.num_ins,
@@ -185,6 +184,12 @@ void Vst3Bridge::run() {
                 return YaComponent::GetBusArrangementResponse{
                     .result = result, .updated_arr = request.arr};
             },
+            [&](YaComponent::CanProcessSampleSize& request)
+                -> YaComponent::CanProcessSampleSize::Response {
+                return component_instances[request.instance_id]
+                    .audio_processor->canProcessSampleSize(
+                        request.symbolic_sample_size);
+            },
             [&](const YaPluginFactory::Construct&)
                 -> YaPluginFactory::Construct::Response {
                 return YaPluginFactory::ConstructArgs(