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Diffstat (limited to 'src/plugins/directshow/common/directshowpinenum.cpp')
-rw-r--r-- | src/plugins/directshow/common/directshowpinenum.cpp | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/src/plugins/directshow/common/directshowpinenum.cpp b/src/plugins/directshow/common/directshowpinenum.cpp new file mode 100644 index 000000000..910bba77d --- /dev/null +++ b/src/plugins/directshow/common/directshowpinenum.cpp @@ -0,0 +1,130 @@ +/**************************************************************************** +** +** 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_index(0) +{ + 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_filter(NULL) + , m_pins(pins) + , m_index(0) +{ + 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::getInterface(REFIID riid, void **ppvObject) +{ + if (riid == IID_IEnumPins) { + return GetInterface(static_cast<IEnumPins *>(this), ppvObject); + } else { + return DirectShowObject::getInterface(riid, ppvObject); + } +} + +HRESULT DirectShowPinEnum::Next(ULONG cPins, IPin **ppPins, ULONG *pcFetched) +{ + if (ppPins && (pcFetched || cPins == 1)) { + 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; + } else { + return E_POINTER; + } +} + +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) { + if (m_filter) + *ppEnum = new DirectShowPinEnum(m_filter); + else + *ppEnum = new DirectShowPinEnum(m_pins); + + return S_OK; + } else { + return E_POINTER; + } +} + +QT_END_NAMESPACE |