obs-vst: Remove submodule in favour of direct merge 2/2

Please visit the submodule repo for blame history:
https://github.com/obsproject/obs-vst

This also replaces the obs-vst .clang-format with obs-studio's.

This commit depends on the previous commit, which removes the submodule
separately as Git complains otherwise.

Co-authored-by: Alex Anderson <anderson.john.alexander@gmail.com>
Co-authored-by: Anton <camotank12345@gmail.com>
Co-authored-by: Blue Cat Audio <support@bluecataudio.com>
Co-authored-by: Cephas Reis <c3r1c3@nevermindonline.com>
Co-authored-by: Colin Edwards <colin@recursivepenguin.com>
Co-authored-by: Florian Zwoch <fzwoch@gmail.com>
Co-authored-by: Fogmoon <i@fogmoon.com>
Co-authored-by: Gol-D-Ace <Gol-D-Ace@users.noreply.github.com>
Co-authored-by: Igor Bochkariov <ujifgc@gmail.com>
Co-authored-by: Jesse Chappell <jesse@sonosaurus.com>
Co-authored-by: Keen <523059842@qq.com>
Co-authored-by: Kurt Kartaltepe <kkartaltepe@gmail.com>
Co-authored-by: Matt Gajownik <matt@obsproject.com>
Co-authored-by: Matt Gajownik <matt@wizardcm.com>
Co-authored-by: Richard Stanway <notr1ch@users.noreply.github.com>
Co-authored-by: Ryan Foster <RytoEX@gmail.com>
Co-authored-by: follower <github@rancidbacon.com>
Co-authored-by: gxalpha <beckmann.sebastian@outlook.de>
Co-authored-by: jp9000 <obs.jim@gmail.com>
Co-authored-by: jpark37 <jpark37@users.noreply.github.com>
Co-authored-by: mntone <sd8@live.jp>
Co-authored-by: tytan652 <tytan652@tytanium.xyz>
Co-authored-by: wangshaohui <97082645@qq.com>
Co-authored-by: wangshaohui <wang.shaohui@navercorp.com>

plugins/obs-vst/win/VSTPlugin-win.cpp

@@ -0,0 +1,91 @@
+/*****************************************************************************
+Copyright (C) 2016-2017 by Colin Edwards.
+Additional Code Copyright (C) 2016-2017 by c3r1c3 <c3r1c3@nevermindonline.com>
+
+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, see <http://www.gnu.org/licenses/>.
+*****************************************************************************/
+#include "../headers/VSTPlugin.h"
+#include "../headers/vst-plugin-callbacks.hpp"
+
+#include <util/platform.h>
+#include <windows.h>
+
+AEffect *VSTPlugin::loadEffect()
+{
+	AEffect *plugin = nullptr;
+
+	wchar_t *wpath;
+	os_utf8_to_wcs_ptr(pluginPath.c_str(), 0, &wpath);
+	dllHandle = LoadLibraryW(wpath);
+	bfree(wpath);
+	if (dllHandle == nullptr) {
+
+		DWORD errorCode = GetLastError();
+
+		// Display the error message and exit the process
+		if (errorCode == ERROR_BAD_EXE_FORMAT) {
+			blog(LOG_WARNING, "Could not open library, "
+					  "wrong architecture.");
+		} else {
+			blog(LOG_WARNING,
+			     "Failed trying to load VST from '%s'"
+			     ", error %d\n",
+			     pluginPath.c_str(), GetLastError());
+		}
+		return nullptr;
+	}
+
+	vstPluginMain mainEntryPoint =
+		(vstPluginMain)GetProcAddress(dllHandle, "VSTPluginMain");
+
+	if (mainEntryPoint == nullptr) {
+		mainEntryPoint = (vstPluginMain)GetProcAddress(
+			dllHandle, "VstPluginMain()");
+	}
+
+	if (mainEntryPoint == nullptr) {
+		mainEntryPoint =
+			(vstPluginMain)GetProcAddress(dllHandle, "main");
+	}
+
+	if (mainEntryPoint == nullptr) {
+		blog(LOG_WARNING, "Couldn't get a pointer to plug-in's main()");
+		return nullptr;
+	}
+
+	// Instantiate the plug-in
+	try {
+		plugin = mainEntryPoint(hostCallback_static);
+	} catch (...) {
+		blog(LOG_WARNING, "VST plugin initialization failed");
+		return nullptr;
+	}
+
+	if (plugin == nullptr) {
+		blog(LOG_WARNING, "Couldn't create instance for '%s'",
+		     pluginPath.c_str());
+		return nullptr;
+	}
+
+	plugin->user = this;
+	return plugin;
+}
+
+void VSTPlugin::unloadLibrary()
+{
+	if (dllHandle) {
+		FreeLibrary(dllHandle);
+		dllHandle = nullptr;
+	}
+}