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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "directshowpinenum.h"
#include "directshowbasefilter.h"
QT_BEGIN_NAMESPACE
DirectShowPinEnum::DirectShowPinEnum(DirectShowBaseFilter *filter)
: m_filter(filter)
{
m_filter->AddRef();
const QList<DirectShowPin *> pinList = filter->pins();
for (DirectShowPin *pin : pinList) {
pin->AddRef();
m_pins.append(pin);
}
}
DirectShowPinEnum::DirectShowPinEnum(const QList<IPin *> &pins)
: m_pins(pins)
{
for (IPin *pin : qAsConst(m_pins))
pin->AddRef();
}
DirectShowPinEnum::~DirectShowPinEnum()
{
for (IPin *pin : qAsConst(m_pins))
pin->Release();
if (m_filter)
m_filter->Release();
}
HRESULT DirectShowPinEnum::QueryInterface(REFIID riid, void **ppv)
{
if (ppv == nullptr)
return E_POINTER;
if (riid == IID_IUnknown)
*ppv = static_cast<IUnknown *>(this);
else if (riid == IID_IEnumPins)
*ppv = static_cast<IEnumPins *>(this);
else
return E_NOINTERFACE;
AddRef();
return S_OK;
}
HRESULT DirectShowPinEnum::Next(ULONG cPins, IPin **ppPins, ULONG *pcFetched)
{
if (!ppPins || (!pcFetched && cPins != 1))
return E_POINTER;
ULONG count = qBound<ULONG>(0, cPins, m_pins.count() - m_index);
for (ULONG i = 0; i < count; ++i, ++m_index) {
ppPins[i] = m_pins.at(m_index);
ppPins[i]->AddRef();
}
if (pcFetched)
*pcFetched = count;
return count == cPins ? S_OK : S_FALSE;
}
HRESULT DirectShowPinEnum::Skip(ULONG cPins)
{
m_index = qMin(int(m_index + cPins), m_pins.count());
return m_index < m_pins.count() ? S_OK : S_FALSE;
}
HRESULT DirectShowPinEnum::Reset()
{
m_index = 0;
return S_OK;
}
HRESULT DirectShowPinEnum::Clone(IEnumPins **ppEnum)
{
if (!ppEnum)
return E_POINTER;
*ppEnum = m_filter ? new DirectShowPinEnum(m_filter) : new DirectShowPinEnum(m_pins);
return S_OK;
}
QT_END_NAMESPACE
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