Implement IAudioProcessor::getLatencySamples()

src/common/logging/vst3.cpp

@@ -180,6 +180,14 @@ void Vst3Logger::log_request(bool is_host_vst,
     });
 }
 
+void Vst3Logger::log_request(bool is_host_vst,
+                             const YaComponent::GetLatencySamples& request) {
+    log_request_base(is_host_vst, [&](auto& message) {
+        message << "<IAudioProcessor* #" << request.instance_id
+                << ">::getLatencySamples()";
+    });
+}
+
 void Vst3Logger::log_request(bool is_host_vst,
                              const YaPluginFactory::Construct&) {
     log_request_base(is_host_vst,
@@ -199,6 +207,10 @@ void Vst3Logger::log_request(bool is_host_vst, const WantsConfiguration&) {
     });
 }
 
+void Vst3Logger::log_response(bool is_host_vst, const uint32& value) {
+    log_response_base(is_host_vst, [&](auto& message) { message << value; });
+}
+
 void Vst3Logger::log_response(bool is_host_vst, const Ack&) {
     log_response_base(is_host_vst, [&](auto& message) { message << "ACK"; });
 }

src/common/logging/vst3.h

@@ -72,10 +72,12 @@ class Vst3Logger {
     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 YaComponent::GetLatencySamples&);
     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&);
 
+    void log_response(bool is_host_vst, const uint32&);
     void log_response(bool is_host_vst, const Ack&);
     void log_response(
         bool is_host_vst,

src/common/serialization/vst3.h

@@ -72,6 +72,7 @@ using ControlRequest = std::variant<YaComponent::Construct,
                                     YaComponent::SetBusArrangements,
                                     YaComponent::GetBusArrangement,
                                     YaComponent::CanProcessSampleSize,
+                                    YaComponent::GetLatencySamples,
                                     YaPluginFactory::Construct,
                                     YaPluginFactory::SetHostContext>;
 

src/common/serialization/vst3/component.h

@@ -522,6 +522,23 @@ class YaComponent : public Steinberg::Vst::IComponent,
 
     virtual tresult PLUGIN_API
     canProcessSampleSize(int32 symbolicSampleSize) override = 0;
+
+    /**
+     * Message to pass through a call to
+     * `IAudioProcessor::getLatencySamples()` to the Wine
+     * plugin host.
+     */
+    struct GetLatencySamples {
+        using Response = PrimitiveWrapper<uint32>;
+
+        native_size_t instance_id;
+
+        template <typename S>
+        void serialize(S& s) {
+            s.value8b(instance_id);
+        }
+    };
+
     virtual uint32 PLUGIN_API getLatencySamples() override = 0;
     virtual tresult PLUGIN_API
     setupProcessing(Steinberg::Vst::ProcessSetup& setup) override = 0;

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

@@ -201,9 +201,8 @@ YaComponentPluginImpl::canProcessSampleSize(int32 symbolicSampleSize) {
 }
 
 uint32 PLUGIN_API YaComponentPluginImpl::getLatencySamples() {
-    // TODO: Implement
-    bridge.logger.log("TODO: IAudioProcessor::getLatencySamples()");
-    return 0;
+    return bridge.send_message(
+        YaComponent::GetLatencySamples{.instance_id = arguments.instance_id});
 }
 
 tresult PLUGIN_API

src/wine-host/bridges/vst3.cpp

@@ -190,6 +190,11 @@ void Vst3Bridge::run() {
                     .audio_processor->canProcessSampleSize(
                         request.symbolic_sample_size);
             },
+            [&](YaComponent::GetLatencySamples& request)
+                -> YaComponent::GetLatencySamples::Response {
+                return component_instances[request.instance_id]
+                    .audio_processor->getLatencySamples();
+            },
             [&](const YaPluginFactory::Construct&)
                 -> YaPluginFactory::Construct::Response {
                 return YaPluginFactory::ConstructArgs(