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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
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**
**
****************************************************************************/
#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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