Add MinHook-based overlay for Windows x64.

This commit adds MinHook as a 3rd party
dependency and adds an alternative HardHook
implementation that makes use of MinHook.

This new MinHook-based HardHook implementation
allows us to provide an overlay for Mumble on
Windows x64.

The x64 overlay hasn't seen much testing in
real-world x64 games, except some minor testing
for World of Warcraft running in x64 mode, where
it works just fine.

There seems to be a compatibility with the Uplay
overlay, which causes Far Cry 4 to crash at the
"Press any key to continue" screen that is shown
just after launching the game. However,
Assassin's Creed: Unity works fine, so it might
just be a Far Cry 4 issue.

The x64 overlay also seems to interoperate with
the Steam overlay just fine.

I think this is a good starting point for the
feature. Let us get it into snapshots and let
us try to squash any addition bugs we find.

4 files changed, 96 insertions, 6 deletions

diff --git a/src/mumble/OverlayConfig.cpp b/src/mumble/OverlayConfig.cpp
index ce72fb20f..ca8fd96da 100644
--- a/src/mumble/OverlayConfig.cpp
+++ b/src/mumble/OverlayConfig.cpp
@@ -52,7 +52,7 @@ static ConfigWidget *OverlayConfigDialogNew(Settings &st) {
 }
 
 // Hide overlay config for Mac OS X universal builds
-#if !defined(USE_MAC_UNIVERSAL) && !defined(Q_OS_WIN64)
+#if !defined(USE_MAC_UNIVERSAL)
 static ConfigRegistrar registrar(6000, OverlayConfigDialogNew);
 #endif
 
diff --git a/src/mumble/Overlay_win.cpp b/src/mumble/Overlay_win.cpp
index 44ca4a34e..ef47db0fc 100644
--- a/src/mumble/Overlay_win.cpp
+++ b/src/mumble/Overlay_win.cpp
@@ -53,11 +53,6 @@ OverlayPrivateWin::OverlayPrivateWin(QObject *p) : OverlayPrivate(p) {
 	hpRemove = NULL;
 	qlOverlay = new QLibrary(this);
 
-#ifdef Q_OS_WIN64
-	qWarning("Overlay: suppressing OverlayPrivateWin initialization on x64");
-	return;
-#endif
-
 	QString path = QString::fromLatin1("%1/mumble_ol.dll").arg(qApp->applicationDirPath());
 	qlOverlay->setFileName(path);
 	if (! qlOverlay->load()) {
diff --git a/src/mumble/licenses.h b/src/mumble/licenses.h
index 218f39ee4..14766c23b 100644
--- a/src/mumble/licenses.h
+++ b/src/mumble/licenses.h
@@ -361,6 +361,92 @@ static const char *licenseMachOverride =
 #endif
 
 
+#ifdef Q_OS_WIN64
+static const char *licenseMinHook = 
+	"MinHook - The Minimalistic API Hooking Library for x64/x86\n"
+	"Copyright (C) 2009-2014 Tsuda Kageyu.\n"
+	"All rights reserved.\n"
+	"\n"
+	"Redistribution and use in source and binary forms, with or without\n"
+	"modification, are permitted provided that the following conditions\n"
+	"are met:\n"
+	"\n"
+	" 1. Redistributions of source code must retain the above copyright\n"
+	"    notice, this list of conditions and the following disclaimer.\n"
+	" 2. Redistributions in binary form must reproduce the above copyright\n"
+	"    notice, this list of conditions and the following disclaimer in the\n"
+	"    documentation and/or other materials provided with the distribution.\n"
+	"\n"
+	"THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
+	"\"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED\n"
+	"TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A\n"
+	"PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER\n"
+	"OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,\n"
+	"EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,\n"
+	"PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n"
+	"PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n"
+	"LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n"
+	"NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n"
+	"SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
+	"\n"
+	"================================================================================\n"
+	"Portions of this software are Copyright (c) 2008-2009, Vyacheslav Patkov.\n"
+	"================================================================================\n"
+	"Hacker Disassembler Engine 32 C\n"
+	"Copyright (c) 2008-2009, Vyacheslav Patkov.\n"
+	"All rights reserved.\n"
+	"\n"
+	"Redistribution and use in source and binary forms, with or without\n"
+	"modification, are permitted provided that the following conditions\n"
+	"are met:\n"
+	"\n"
+	" 1. Redistributions of source code must retain the above copyright\n"
+	"    notice, this list of conditions and the following disclaimer.\n"
+	" 2. Redistributions in binary form must reproduce the above copyright\n"
+	"    notice, this list of conditions and the following disclaimer in the\n"
+	"    documentation and/or other materials provided with the distribution.\n"
+	"\n"
+	"THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
+	"\"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED\n"
+	"TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A\n"
+	"PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR\n"
+	"CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,\n"
+	"EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,\n"
+	"PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n"
+	"PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n"
+	"LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n"
+	"NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n"
+	"SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
+	"\n"
+	"-------------------------------------------------------------------------------\n"
+	"Hacker Disassembler Engine 64 C\n"
+	"Copyright (c) 2008-2009, Vyacheslav Patkov.\n"
+	"All rights reserved.\n"
+	"\n"
+	"Redistribution and use in source and binary forms, with or without\n"
+	"modification, are permitted provided that the following conditions\n"
+	"are met:\n"
+	"\n"
+	" 1. Redistributions of source code must retain the above copyright\n"
+	"    notice, this list of conditions and the following disclaimer.\n"
+	" 2. Redistributions in binary form must reproduce the above copyright\n"
+	"    notice, this list of conditions and the following disclaimer in the\n"
+	"    documentation and/or other materials provided with the distribution.\n"
+	"\n"
+	"THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
+	"\"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED\n"
+	"TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A\n"
+	"PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR\n"
+	"CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,\n"
+	"EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,\n"
+	"PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n"
+	"PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n"
+	"LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n"
+	"NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n"
+	"SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.";
+#endif
+
+
 #ifdef USING_BUNDLED_QT_TRANSLATIONS
 static const char *licenseQtTranslations = 
 	"Mumble uses Qt translations created by the VirtualBox community\n"
@@ -430,6 +516,9 @@ static const ThirdPartyLicense licenses3rdParties[] = {
 #ifdef Q_OS_MAC
 	ThirdPartyLicense("mach_override", "https://github.com/rentzsch/mach_star", licenseMachOverride),
 #endif
+#ifdef Q_OS_WIN64
+	ThirdPartyLicense("MinHook", "https://github.com/TsudaKageyu/minhook", licenseMinHook),
+#endif
 #ifdef USING_BUNDLED_QT_TRANSLATIONS
 	ThirdPartyLicense("Additional Qt translations", "https://www.virtualbox.org/ticket/2018", licenseQtTranslations),
 #endif
diff --git a/src/mumble/mumble.pro b/src/mumble/mumble.pro
index 24060aac8..df8b00389 100644
--- a/src/mumble/mumble.pro
+++ b/src/mumble/mumble.pro
@@ -333,6 +333,12 @@ win32 {
   LIBS		*= -ldxguid -ldinput8 -lsapi -lole32 -lws2_32 -ladvapi32 -lwintrust -ldbghelp -llibsndfile-1 -lshell32 -lshlwapi -luser32 -lgdi32 -lpsapi
   LIBS		*= -ldelayimp -delayload:speex.dll -delayload:shell32.dll
 
+  equals(QMAKE_TARGET.arch, x86_64) {
+    DEFINES += USE_MINHOOK
+    INCLUDEPATH *= ../../3rdparty/minhook-src/include
+    LIBS *= -lminhook
+  }
+
   DEFINES	*= WIN32
   !CONFIG(no-asio) {
     CONFIG	*= asio