Implement IUnitInfo::getProgramInfo

src/common/logging/vst3.cpp

@@ -471,6 +471,17 @@ bool Vst3Logger::log_request(bool is_host_vst,
     });
 }
 
+bool Vst3Logger::log_request(bool is_host_vst,
+                             const YaUnitInfo::GetProgramInfo& request) {
+    return log_request_base(is_host_vst, [&](auto& message) {
+        message << request.instance_id
+                << ": IUnitInfo::getProgramInfo(listId = " << request.list_id
+                << ", programIndex = " << request.program_index
+                << ", attributeId = " << request.attribute_id
+                << ", &attributeValue)";
+    });
+}
+
 bool Vst3Logger::log_request(
     bool is_host_vst,
     const YaAudioProcessor::SetBusArrangements& request) {
@@ -904,6 +915,19 @@ void Vst3Logger::log_response(
     });
 }
 
+void Vst3Logger::log_response(
+    bool is_host_vst,
+    const YaUnitInfo::GetProgramInfoResponse& response) {
+    log_response_base(is_host_vst, [&](auto& message) {
+        message << response.result.string();
+        if (response.result == Steinberg::kResultOk) {
+            message << ", \""
+                    << VST3::StringConvert::convert(response.attribute_value)
+                    << "\"";
+        }
+    });
+}
+
 void Vst3Logger::log_response(
     bool is_host_vst,
     const YaAudioProcessor::GetBusArrangementResponse& response) {

src/common/logging/vst3.h

@@ -113,6 +113,7 @@ class Vst3Logger {
     bool log_request(bool is_host_vst, const YaUnitInfo::GetProgramListCount&);
     bool log_request(bool is_host_vst, const YaUnitInfo::GetProgramListInfo&);
     bool log_request(bool is_host_vst, const YaUnitInfo::GetProgramName&);
+    bool log_request(bool is_host_vst, const YaUnitInfo::GetProgramInfo&);
 
     bool log_request(bool is_host_vst,
                      const YaAudioProcessor::SetBusArrangements&);
@@ -171,6 +172,8 @@ class Vst3Logger {
                       const YaUnitInfo::GetProgramListInfoResponse&);
     void log_response(bool is_host_vst,
                       const YaUnitInfo::GetProgramNameResponse&);
+    void log_response(bool is_host_vst,
+                      const YaUnitInfo::GetProgramInfoResponse&);
 
     void log_response(bool is_host_vst,
                       const YaAudioProcessor::GetBusArrangementResponse&);

src/common/serialization/vst3.h

@@ -104,7 +104,8 @@ using ControlRequest = std::variant<Vst3PlugViewProxy::Destruct,
                                     YaUnitInfo::GetUnitInfo,
                                     YaUnitInfo::GetProgramListCount,
                                     YaUnitInfo::GetProgramListInfo,
-                                    YaUnitInfo::GetProgramName>;
+                                    YaUnitInfo::GetProgramName,
+                                    YaUnitInfo::GetProgramInfo>;
 
 template <typename S>
 void serialize(S& s, ControlRequest& payload) {

src/common/serialization/vst3/plugin/unit-info.h

@@ -210,6 +210,45 @@ class YaUnitInfo : public Steinberg::Vst::IUnitInfo {
     getProgramName(Steinberg::Vst::ProgramListID listId,
                    int32 programIndex,
                    Steinberg::Vst::String128 name /*out*/) override = 0;
+
+    /**
+     * The response code and returned name for a call to
+     * `IUnitInfo::getPrograminfo(list_id, program_index, attribute_name,
+     * &attribute_value)`.
+     */
+    struct GetProgramInfoResponse {
+        UniversalTResult result;
+        std::u16string attribute_value;
+
+        template <typename S>
+        void serialize(S& s) {
+            s.object(result);
+            s.text2b(attribute_value, std::extent_v<Steinberg::Vst::String128>);
+        }
+    };
+
+    /**
+     * Message to pass through a call to `IUnitInfo::getProgramInfo(list_id,
+     * program_index, attribute_id, &attribute_value)` to the Wine plugin host.
+     */
+    struct GetProgramInfo {
+        using Response = GetProgramInfoResponse;
+
+        native_size_t instance_id;
+
+        Steinberg::Vst::ProgramListID list_id;
+        int32 program_index;
+        std::string attribute_id;
+
+        template <typename S>
+        void serialize(S& s) {
+            s.value8b(instance_id);
+            s.value4b(list_id);
+            s.value4b(program_index);
+            s.text1b(attribute_id, 256);
+        }
+    };
+
     virtual tresult PLUGIN_API getProgramInfo(
         Steinberg::Vst::ProgramListID listId,
         int32 programIndex,

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

@@ -494,9 +494,19 @@ tresult PLUGIN_API Vst3PluginProxyImpl::getProgramInfo(
     int32 programIndex,
     Steinberg::Vst::CString attributeId /*in*/,
     Steinberg::Vst::String128 attributeValue /*out*/) {
-    // TODO: Implement
+    assert(attributeId);
-    bridge.logger.log("TODO: IUnitInfo::getProgramInfo()");
+
-    return Steinberg::kNotImplemented;
+    const GetProgramInfoResponse response = bridge.send_message(
+        YaUnitInfo::GetProgramInfo{.instance_id = instance_id(),
+                                   .list_id = listId,
+                                   .program_index = programIndex,
+                                   .attribute_id = attributeId});
+
+    std::copy(response.attribute_value.begin(), response.attribute_value.end(),
+              attributeValue);
+    attributeValue[response.attribute_value.size()] = 0;
+
+    return response.result;
 }
 
 tresult PLUGIN_API

src/wine-host/bridges/vst3.cpp

@@ -607,6 +607,20 @@ void Vst3Bridge::run() {
                 return YaUnitInfo::GetProgramNameResponse{
                     .result = result, .name = tchar_pointer_to_u16string(name)};
             },
+            [&](const YaUnitInfo::GetProgramInfo& request)
+                -> YaUnitInfo::GetProgramInfo::Response {
+                Steinberg::Vst::String128 attribute_value{0};
+                const tresult result =
+                    object_instances[request.instance_id]
+                        .unit_info->getProgramInfo(
+                            request.list_id, request.program_index,
+                            request.attribute_id.c_str(), attribute_value);
+
+                return YaUnitInfo::GetProgramInfoResponse{
+                    .result = result,
+                    .attribute_value =
+                        tchar_pointer_to_u16string(attribute_value)};
+            },
         });
 }