diff options
Diffstat (limited to 'src/plugins/directshow/player/directshowmediatypelist.cpp')
| -rw-r--r-- | src/plugins/directshow/player/directshowmediatypelist.cpp | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/src/plugins/directshow/player/directshowmediatypelist.cpp b/src/plugins/directshow/player/directshowmediatypelist.cpp new file mode 100644 index 000000000..3060975fc --- /dev/null +++ b/src/plugins/directshow/player/directshowmediatypelist.cpp @@ -0,0 +1,226 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the Qt Mobility Components. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "directshowmediatypelist.h" + +#include "directshowmediatype.h" +#include "videosurfacefilter.h" + + +class DirectShowMediaTypeEnum : public IEnumMediaTypes +{ +public: + DirectShowMediaTypeEnum(DirectShowMediaTypeList *list, int token, int index = 0); + ~DirectShowMediaTypeEnum(); + + // IUnknown + HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void **ppvObject); + ULONG STDMETHODCALLTYPE AddRef(); + ULONG STDMETHODCALLTYPE Release(); + + // IEnumMediaTypes + HRESULT STDMETHODCALLTYPE Next( + ULONG cMediaTypes, AM_MEDIA_TYPE **ppMediaTypes, ULONG *pcFetched); + HRESULT STDMETHODCALLTYPE Skip(ULONG cMediaTypes); + HRESULT STDMETHODCALLTYPE Reset(); + + HRESULT STDMETHODCALLTYPE Clone(IEnumMediaTypes **ppEnum); + +private: + LONG m_ref; + DirectShowMediaTypeList *m_list; + int m_mediaTypeToken; + int m_index; +}; + + +DirectShowMediaTypeEnum::DirectShowMediaTypeEnum( + DirectShowMediaTypeList *list, int token, int index) + : m_ref(1) + , m_list(list) + , m_mediaTypeToken(token) + , m_index(index) +{ + m_list->AddRef(); +} + +DirectShowMediaTypeEnum::~DirectShowMediaTypeEnum() +{ + m_list->Release(); +} + +HRESULT DirectShowMediaTypeEnum::QueryInterface(REFIID riid, void **ppvObject) +{ + if (!ppvObject) { + return E_POINTER; + } else if (riid == IID_IUnknown + || riid == IID_IEnumMediaTypes) { + *ppvObject = static_cast<IEnumMediaTypes *>(this); + } else { + *ppvObject = 0; + + return E_NOINTERFACE; + } + + AddRef(); + + return S_OK; +} + +ULONG DirectShowMediaTypeEnum::AddRef() +{ + return InterlockedIncrement(&m_ref); +} + +ULONG DirectShowMediaTypeEnum::Release() +{ + ULONG ref = InterlockedDecrement(&m_ref); + + if (ref == 0) { + delete this; + } + + return ref; +} + +HRESULT DirectShowMediaTypeEnum::Next( + ULONG cMediaTypes, AM_MEDIA_TYPE **ppMediaTypes, ULONG *pcFetched) +{ + return m_list->nextMediaType(m_mediaTypeToken, &m_index, cMediaTypes, ppMediaTypes, pcFetched); +} + +HRESULT DirectShowMediaTypeEnum::Skip(ULONG cMediaTypes) +{ + return m_list->skipMediaType(m_mediaTypeToken, &m_index, cMediaTypes); +} + +HRESULT DirectShowMediaTypeEnum::Reset() +{ + m_mediaTypeToken = m_list->currentMediaTypeToken(); + m_index = 0; + + return S_OK; +} + +HRESULT DirectShowMediaTypeEnum::Clone(IEnumMediaTypes **ppEnum) +{ + return m_list->cloneMediaType(m_mediaTypeToken, m_index, ppEnum); +} + + +DirectShowMediaTypeList::DirectShowMediaTypeList() + : m_mediaTypeToken(0) +{ +} + +IEnumMediaTypes *DirectShowMediaTypeList::createMediaTypeEnum() +{ + return new DirectShowMediaTypeEnum(this, m_mediaTypeToken, 0); +} + + +void DirectShowMediaTypeList::setMediaTypes(const QVector<AM_MEDIA_TYPE> &types) +{ + ++m_mediaTypeToken; + + m_mediaTypes = types; +} + + +int DirectShowMediaTypeList::currentMediaTypeToken() +{ + return m_mediaTypeToken; +} + +HRESULT DirectShowMediaTypeList::nextMediaType( + int token, int *index, ULONG count, AM_MEDIA_TYPE **types, ULONG *fetchedCount) +{ + if (!types || (count != 1 && !fetchedCount)) { + return E_POINTER; + } else if (m_mediaTypeToken != token) { + return VFW_E_ENUM_OUT_OF_SYNC; + } else { + int boundedCount = qBound<int>(0, count, m_mediaTypes.count() - *index); + + for (int i = 0; i < boundedCount; ++i, ++(*index)) { + types[i] = reinterpret_cast<AM_MEDIA_TYPE *>(CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE))); + + if (types[i]) { + DirectShowMediaType::copy(types[i], m_mediaTypes.at(*index)); + } else { + for (--i; i >= 0; --i) + CoTaskMemFree(types[i]); + + if (fetchedCount) + *fetchedCount = 0; + + return E_OUTOFMEMORY; + } + } + if (fetchedCount) + *fetchedCount = boundedCount; + + return boundedCount == count ? S_OK : S_FALSE; + } +} + +HRESULT DirectShowMediaTypeList::skipMediaType(int token, int *index, ULONG count) +{ + if (m_mediaTypeToken != token) { + return VFW_E_ENUM_OUT_OF_SYNC; + } else { + *index = qMin<int>(*index + count, m_mediaTypes.size()); + + return *index < m_mediaTypes.size() ? S_OK : S_FALSE; + } +} + +HRESULT DirectShowMediaTypeList::cloneMediaType(int token, int index, IEnumMediaTypes **enumeration) +{ + if (m_mediaTypeToken != token) { + return VFW_E_ENUM_OUT_OF_SYNC; + } else { + *enumeration = new DirectShowMediaTypeEnum(this, token, index); + + return S_OK; + } +} + |