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// Copyright 2005-2019 The Mumble Developers. All rights reserved.
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file at the root of the
// Mumble source tree or at <https://www.mumble.info/LICENSE>.
#include "XboxInput.h"
#include <QtCore/QStringList>
const QUuid XboxInput::s_XboxInputGuid = QUuid(QString::fromLatin1("ca3937e3-640c-4d9e-9ef3-903f8b4fbcab"));
XboxInput::XboxInput()
: GetState(NULL)
, m_getStateFunc(NULL)
, m_getStateExFunc(NULL)
, m_xinputlib(NULL)
, m_valid(false) {
// Load the most suitable XInput DLL available.
//
// We prefer 1_4 and 1_3 over the others because they provide
// XInputGetStateEx(), which allows us to query the state of
// the guide button.
//
// See https://msdn.microsoft.com/en-us/library/windows/desktop/hh405051(v=vs.85).aspx
// for more information.
QStringList alternatives;
alternatives << QLatin1String("XInput1_4.dll");
alternatives << QLatin1String("xinput1_3.dll");
alternatives << QLatin1String("XInput9_1_0.dll");
alternatives << QLatin1String("xinput1_2.dll");
alternatives << QLatin1String("xinput1_1.dll");
foreach(const QString &lib, alternatives) {
m_xinputlib = LoadLibraryW(reinterpret_cast<const wchar_t *>(lib.utf16()));
if (m_xinputlib != NULL) {
qWarning("XboxInput: using XInput DLL '%s'", qPrintable(lib));
m_valid = true;
break;
}
}
if (!m_valid) {
qWarning("XboxInput: no valid XInput DLL was found on the system.");
return;
}
m_getStateFunc = reinterpret_cast<XboxInputGetStateFunc>(GetProcAddress(m_xinputlib, "XInputGetState"));
// Undocumented XInputGetStateEx -- ordinal 100. It is available in XInput 1.3 and greater.
// It provides access to the state of the guide button.
// For reference, see SDL's XInput support: http://www.libsdl.org/tmp/SDL/src/core/windows/SDL_xinput.c
m_getStateExFunc = reinterpret_cast<XboxInputGetStateFunc>(GetProcAddress(m_xinputlib, (char *)100));
if (m_getStateExFunc != NULL) {
GetState = m_getStateExFunc;
qWarning("XboxInput: using XInputGetStateEx() as querying function.");
} else if (m_getStateFunc != NULL) {
GetState = m_getStateFunc;
qWarning("XboxInput: using XInputGetState() as querying function.");
} else {
m_valid = false;
qWarning("XboxInput: no valid querying function found.");
}
}
XboxInput::~XboxInput() {
if (m_xinputlib) {
FreeLibrary(m_xinputlib);
}
}
bool XboxInput::isValid() const {
return m_valid;
}
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