Implement IAudioProcessor::getTailSamples()

README.md

@@ -17,7 +17,9 @@ imcomplete list of things that still have to be done before this can be used:
 
 - Left to implement:
   - `YaHostApplicationHostImpl::createComponent`.
-  - `IAudioProcessor` and `IConnectionPoint` to supplement `IComponent`
+  - `IAudioProcessor::process()` along with every interface and struct involved
+    in `ProcessData`
+  - `IConnectionPoint` to supplement `IComponent`
   - `IEditController{,2}`
   - All other mandatory interfaces
   - All other optional interfaces

src/common/logging/vst3.cpp

@@ -37,7 +37,7 @@ void Vst3Logger::log_unknown_interface(
 }
 
 void Vst3Logger::log_request(bool is_host_vst, const YaComponent::Construct&) {
-    log_request_base(is_host_vst, [](auto& message) {
+    log_request_base(is_host_vst, [&](auto& message) {
         // TODO: Log the CID on verbosity level 2, and then also report all CIDs
         //       in the plugin factory
         message << "IPluginFactory::createComponent(cid = ..., _iid = "
@@ -209,21 +209,29 @@ void Vst3Logger::log_request(bool is_host_vst,
     });
 }
 
+void Vst3Logger::log_request(bool is_host_vst,
+                             const YaComponent::GetTailSamples& request) {
+    log_request_base(is_host_vst, [&](auto& message) {
+        message << "<IAudioProcessor* #" << request.instance_id
+                << ">::getTailSamples()";
+    });
+}
+
 void Vst3Logger::log_request(bool is_host_vst,
                              const YaPluginFactory::Construct&) {
     log_request_base(is_host_vst,
-                     [](auto& message) { message << "GetPluginFactory()"; });
+                     [&](auto& message) { message << "GetPluginFactory()"; });
 }
 
 void Vst3Logger::log_request(bool is_host_vst,
                              const YaPluginFactory::SetHostContext&) {
-    log_request_base(is_host_vst, [](auto& message) {
+    log_request_base(is_host_vst, [&](auto& message) {
         message << "IPluginFactory3::setHostContext(IHostApplication*)";
     });
 }
 
 void Vst3Logger::log_request(bool is_host_vst, const WantsConfiguration&) {
-    log_request_base(is_host_vst, [](auto& message) {
+    log_request_base(is_host_vst, [&](auto& message) {
         message << "Requesting <Configuration>";
     });
 }
@@ -305,5 +313,5 @@ void Vst3Logger::log_response(bool is_host_vst,
 
 void Vst3Logger::log_response(bool is_host_vst, const Configuration&) {
     log_response_base(is_host_vst,
-                      [](auto& message) { message << "<Configuration"; });
+                      [&](auto& message) { message << "<Configuration"; });
 }

src/common/logging/vst3.h

@@ -75,6 +75,7 @@ class Vst3Logger {
     void log_request(bool is_host_vst, const YaComponent::GetLatencySamples&);
     void log_request(bool is_host_vst, const YaComponent::SetupProcessing&);
     void log_request(bool is_host_vst, const YaComponent::SetProcessing&);
+    void log_request(bool is_host_vst, const YaComponent::GetTailSamples&);
     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

@@ -75,6 +75,8 @@ using ControlRequest = std::variant<YaComponent::Construct,
                                     YaComponent::GetLatencySamples,
                                     YaComponent::SetupProcessing,
                                     YaComponent::SetProcessing,
+                                    // TODO: YaComponent::Process
+                                    YaComponent::GetTailSamples,
                                     YaPluginFactory::Construct,
                                     YaPluginFactory::SetHostContext>;
 

src/common/serialization/vst3/component.h

@@ -582,6 +582,22 @@ class YaComponent : public Steinberg::Vst::IComponent,
     virtual tresult PLUGIN_API setProcessing(TBool state) override = 0;
     virtual tresult PLUGIN_API
     process(Steinberg::Vst::ProcessData& data) override = 0;
+
+    /**
+     * Message to pass through a call to `IAudioProcessor::getTailSamples()`
+     * to the Wine plugin host.
+     */
+    struct GetTailSamples {
+        using Response = PrimitiveWrapper<uint32>;
+
+        native_size_t instance_id;
+
+        template <typename S>
+        void serialize(S& s) {
+            s.value8b(instance_id);
+        }
+    };
+
     virtual uint32 PLUGIN_API getTailSamples() override = 0;
 
    protected:

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

@@ -206,7 +206,6 @@ YaComponentPluginImpl::process(Steinberg::Vst::ProcessData& data) {
 }
 
 uint32 PLUGIN_API YaComponentPluginImpl::getTailSamples() {
-    // TODO: Implement
-    bridge.logger.log("TODO: IAudioProcessor::getTailSamples()");
-    return 0;
+    return bridge.send_message(
+        YaComponent::GetTailSamples{.instance_id = arguments.instance_id});
 }

src/wine-host/bridges/vst3.cpp

@@ -205,6 +205,11 @@ void Vst3Bridge::run() {
                 return component_instances[request.instance_id]
                     .audio_processor->setProcessing(request.state);
             },
+            [&](const YaComponent::GetTailSamples& request)
+                -> YaComponent::GetTailSamples::Response {
+                return component_instances[request.instance_id]
+                    .audio_processor->getTailSamples();
+            },
             [&](const YaPluginFactory::Construct&)
                 -> YaPluginFactory::Construct::Response {
                 return YaPluginFactory::ConstructArgs(