cunknown.cpp
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/* akvirtualcamera, virtual camera for Mac and Windows.
* Copyright (C) 2020 Gonzalo Exequiel Pedone
*
* akvirtualcamera 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 3 of the License, or
* (at your option) any later version.
*
* akvirtualcamera 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 akvirtualcamera. If not, see <http://www.gnu.org/licenses/>.
*
* Web-Site: http://webcamoid.github.io/
*/
#include <atomic>
#include "cunknown.h"
#include "PlatformUtils/src/utils.h"
#include "VCamUtils/src/utils.h"
#define AkCUnknownLogMethod() \
AkLogFunction() << " " \
<< (this->d->m_parent? \
stringFromClsid(this->d->m_parentCLSID): \
std::string("CUnknown")) \
<< "(" \
<< (this->d->m_parent? this->d->m_parent: this) \
<< ")" \
<< std::endl
#define AkCUnknownLogThis() \
AkLogInfo() << "Returning " \
<< (this->d->m_parent? \
stringFromClsid(this->d->m_parentCLSID): \
std::string("CUnknown")) \
<< "(" \
<< (this->d->m_parent? this->d->m_parent: this) \
<< ")" \
<< std::endl
namespace AkVCam
{
class CUnknownPrivate
{
public:
std::atomic<ULONG> m_ref {0};
CUnknown *m_parent {nullptr};
CLSID m_parentCLSID;
};
}
AkVCam::CUnknown::CUnknown(CUnknown *parent, REFIID parentCLSID)
{
this->d = new CUnknownPrivate;
this->d->m_parent = parent;
this->d->m_parentCLSID = parentCLSID;
}
AkVCam::CUnknown::~CUnknown()
{
}
void AkVCam::CUnknown::setParent(AkVCam::CUnknown *parent,
const IID *parentCLSID)
{
this->d->m_parent = parent;
this->d->m_parentCLSID = parentCLSID? *parentCLSID: GUID_NULL;
}
ULONG AkVCam::CUnknown::ref() const
{
return this->d->m_ref;
}
HRESULT AkVCam::CUnknown::QueryInterface(const IID &riid, void **ppvObject)
{
AkCUnknownLogMethod();
AkLogInfo() << "IID: " << AkVCam::stringFromClsid(riid) << std::endl;
if (!ppvObject)
return E_POINTER;
*ppvObject = nullptr;
if (IsEqualIID(riid, IID_IUnknown)
|| IsEqualIID(riid, this->d->m_parentCLSID)) {
AkCUnknownLogThis();
this->d->m_parent->AddRef();
*ppvObject = this->d->m_parent;
return S_OK;
} else {
AkLogWarning() << "Unknown interface" << std::endl;
}
return E_NOINTERFACE;
}
ULONG AkVCam::CUnknown::AddRef()
{
AkCUnknownLogMethod();
this->d->m_ref++;
AkLogInfo() << "REF: " << this->d->m_ref << std::endl;
return this->d->m_ref;
}
ULONG AkVCam::CUnknown::Release()
{
AkCUnknownLogMethod();
AkLogInfo() << "REF: " << this->d->m_ref << std::endl;
if (this->d->m_ref)
this->d->m_ref--;
return this->d->m_ref;
}