Added: VST Plugin support. Add and configure plugins via Configuration Editor. The plugin's architecture has to match the OS architecture, so most people will need 64-bit plugins. The subdirectory plugins is offered to put plugins into, but they can be opened from any directory with sufficient permissions.

Fixed: When trying to add a high-pass filter in the Configuration Editor, it was instead configured to be a low-pass filter.

helpers/VSTPluginLibrary.cpp

@@ -0,0 +1,76 @@
+/*
+    This file is part of Equalizer APO, a system-wide equalizer.
+    Copyright (C) 2017  Jonas Thedering
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "stdafx.h"
+#include "RegistryHelper.h"
+#include "LogHelper.h"
+#include "VSTPluginLibrary.h"
+
+using namespace std;
+
+std::unordered_map<std::wstring, std::weak_ptr<VSTPluginLibrary> > VSTPluginLibrary::instanceMap;
+std::wstring VSTPluginLibrary::defaultPluginPath;
+
+std::shared_ptr<VSTPluginLibrary> VSTPluginLibrary::getInstance(const wstring& libPath)
+{
+	shared_ptr<VSTPluginLibrary> ptr;
+
+	auto it = instanceMap.find(libPath);
+	if (it != instanceMap.end())
+	{
+		weak_ptr<VSTPluginLibrary> instance = it->second;
+		ptr = instance.lock();
+	}
+
+	if (ptr == NULL)
+	{
+		ptr = shared_ptr<VSTPluginLibrary>(new VSTPluginLibrary(libPath));
+		instanceMap[libPath] = ptr;
+	}
+
+	return ptr;
+}
+
+wstring VSTPluginLibrary::getDefaultPluginPath()
+{
+	if (defaultPluginPath == L"")
+	{
+		wstring installPath = RegistryHelper::readValue(APP_REGPATH, L"InstallPath");
+		defaultPluginPath = installPath + L"\\plugins";
+	}
+
+	return defaultPluginPath;
+}
+
+std::wstring VSTPluginLibrary::getLibPath()
+{
+	return libPath;
+}
+
+bool VSTPluginLibrary::loadFunctions()
+{
+	VSTPluginMain = (vstPluginMain)GetProcAddress(module, "VSTPluginMain");
+
+	return VSTPluginMain != NULL;
+}
+
+VSTPluginLibrary::VSTPluginLibrary(const wstring& libPath)
+	: libPath(libPath)
+{
+}