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Source/Utilities/Reaper/ReaperVST3Extensions.cpp

@@ -0,0 +1,131 @@
+/*
+  ==============================================================================
+
+    ReaperVST3Extensions.cpp
+    Created: 14 May 2025 9:43:44pm
+    Author:  binya
+
+  ==============================================================================
+*/
+
+#include "ReaperVST3Extensions.h"
+
+namespace reaper
+{
+    DEF_CLASS_IID(IReaperHostApplication)
+}
+
+juce::String ReaperVST3Extensions::getNamedConfigParam(const juce::String& paramName) const
+{
+    if (GetSetMediaTrackInfo_String == nullptr || GetTrack == nullptr || trackIndex < 0)
+        return {};
+
+    MediaTrack* track = GetTrack(nullptr, trackIndex);
+
+    if (track == nullptr)
+        return {};
+
+    // If our track index has not yet been updated, exit early
+    if (GetTrackGUID(track) != trackGUID)
+        return {};
+
+    constexpr int buffSize = 512;
+    char buffer[buffSize] = {};
+
+    bool success = GetSetMediaTrackInfo_String(track, paramName.getCharPointer(), buffer, false);
+
+    if (!success || buffer[0] == 0)
+        return {};
+
+    return juce::String::fromUTF8(buffer);
+}
+
+void ReaperVST3Extensions::setNamedConfigParam(const juce::String& paramName, const juce::String& value) const
+{
+    if (GetSetMediaTrackInfo_String == nullptr || GetTrack == nullptr || trackIndex < 0)
+        return;
+
+    MediaTrack* track = GetTrack(nullptr, trackIndex);
+
+    if (track == nullptr)
+        return;
+
+    // If our track index has not yet been updated, exit early
+    if (GetTrackGUID(track) != trackGUID)
+        return;
+
+    GetSetMediaTrackInfo_String(track, paramName.getCharPointer(), value.getCharPointer().getAddress(), true);
+}
+
+void ReaperVST3Extensions::setIHostApplication(Steinberg::FUnknown* ptr)
+{
+    if (ptr == nullptr)
+        return;
+
+    void* rawInterface = nullptr;
+
+    if (ptr->queryInterface(reaper::IReaperHostApplication::iid, &rawInterface) == Steinberg::kResultOk)
+    {
+        if (void* fnPtr = static_cast<reaper::IReaperHostApplication*> (rawInterface)->getReaperApi("GetSetMediaTrackInfo_String"))
+        {
+            GetSetMediaTrackInfo_String = reinterpret_cast<bool (*)(MediaTrack*, const char*, char*, bool)>(fnPtr);
+        }
+
+        if (void* fnPtr = static_cast<reaper::IReaperHostApplication*> (rawInterface)->getReaperApi("GetTrack"))
+        {
+            GetTrack = reinterpret_cast<MediaTrack * (*)(ReaProject*, int)>(fnPtr);
+        }
+
+        if (void* fnPtr = static_cast<reaper::IReaperHostApplication*> (rawInterface)->getReaperApi("GetTrackGUID"))
+        {
+            GetTrackGUID = reinterpret_cast<GUID * (*)(MediaTrack*)>(fnPtr);
+        }
+    }
+}
+
+int32_t ReaperVST3Extensions::queryIEditController(const Steinberg::TUID string, void** obj)
+{
+#if JAS_VST3_REAPER_INTEGRATION
+    if (obj == nullptr)
+        return -1;
+    
+    if (Steinberg::FUnknownPrivate::iidEqual(string, Steinberg::Vst::ChannelContext::IInfoListener::iid))
+    {
+        *obj = static_cast<Steinberg::Vst::ChannelContext::IInfoListener*>(this);
+        return 0;
+    }
+
+    *obj = nullptr;
+#endif
+    return -1;
+}
+
+Steinberg::tresult ReaperVST3Extensions::queryInterface(const Steinberg::TUID /*_iid*/, void** /*obj*/)
+{
+    return Steinberg::kNoInterface;
+}
+
+Steinberg::uint32 ReaperVST3Extensions::addRef()
+{
+    return 1;
+}
+
+Steinberg::uint32 ReaperVST3Extensions::release()
+{
+    return 1;
+}
+
+Steinberg::tresult ReaperVST3Extensions::setChannelContextInfos(Steinberg::Vst::IAttributeList* list)
+{
+    if (!list || GetTrackGUID == nullptr)
+        return Steinberg::kResultFalse;
+
+    Steinberg::int64 idx = -1;
+    if (list->getInt(Steinberg::Vst::ChannelContext::kChannelIndexKey, idx) == Steinberg::kResultTrue)
+    {
+        trackIndex = static_cast<int>(idx) - 1;
+        trackGUID = GetTrackGUID(GetTrack(nullptr, trackIndex));
+    }
+
+    return Steinberg::kResultOk;
+}

Source/Utilities/Reaper/ReaperVST3Extensions.h

@@ -0,0 +1,56 @@
+/*
+  ==============================================================================
+
+    ReaperVST3Extensions.h
+    Created: 14 May 2025 9:38:25pm
+    Author:  binya
+
+  ==============================================================================
+*/
+
+#pragma once
+
+#include <JuceHeader.h>
+
+#include <reaper_plugin.h>
+#include "pluginterfaces/base/funknown.h"
+#include "pluginterfaces/vst/ivstchannelcontextinfo.h"
+
+namespace reaper
+{
+    using namespace Steinberg;
+    using INT_PTR = juce::pointer_sized_int;
+    using uint32 = Steinberg::uint32;
+
+    #include <reaper_vst3_interfaces.h>
+}
+
+class ReaperVST3Extensions final : public juce::VST3ClientExtensions, public Steinberg::Vst::ChannelContext::IInfoListener
+{
+public:
+    ReaperVST3Extensions() = default;
+    ~ReaperVST3Extensions() override = default;
+
+    juce::String getNamedConfigParam(const juce::String& paramName) const;
+    void setNamedConfigParam(const juce::String& paramName, const juce::String& value) const;
+
+    void setIHostApplication(Steinberg::FUnknown* ptr) override;
+    int32_t queryIEditController(const Steinberg::TUID, void** obj) override;
+
+    Steinberg::tresult PLUGIN_API setChannelContextInfos(Steinberg::Vst::IAttributeList* list) override;
+
+    Steinberg::tresult PLUGIN_API queryInterface(const Steinberg::TUID _iid, void** obj) override;
+    Steinberg::uint32 PLUGIN_API addRef() override;
+    Steinberg::uint32 PLUGIN_API release() override;
+
+private:
+    // https://github.com/justinfrankel/reaper-sdk/blob/main/sdk/reaper_plugin_functions.h
+    bool (*GetSetMediaTrackInfo_String)(MediaTrack* tr, const char* parmname, char* stringNeedBig, bool setNewValue);
+    MediaTrack* (*GetTrack)(ReaProject* proj, int trackidx) { nullptr };
+    GUID* (*GetTrackGUID)(MediaTrack* tr) { nullptr };
+
+    GUID* trackGUID{ nullptr };
+    int trackIndex{ -1 };
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(ReaperVST3Extensions)
+};