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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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 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, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "mfmetadatacontrol.h"
#include "mfplayerservice.h"
#include "Propkey.h"
//#define DEBUG_MEDIAFOUNDATION
MFMetaDataControl::MFMetaDataControl(QObject *parent)
: QMetaDataReaderControl(parent)
, m_metaData(0)
, m_content(0)
{
}
MFMetaDataControl::~MFMetaDataControl()
{
if (m_metaData)
m_metaData->Release();
if (m_content)
m_content->Release();
}
bool MFMetaDataControl::isMetaDataAvailable() const
{
return m_content || m_metaData;
}
QVariant MFMetaDataControl::metaData(const QString &key) const
{
QVariant value;
if (!isMetaDataAvailable())
return value;
int index = m_availableMetaDatas.indexOf(key);
if (index < 0)
return value;
PROPVARIANT var;
PropVariantInit(&var);
HRESULT hr = S_FALSE;
if (m_content)
hr = m_content->GetValue(m_commonKeys[index], &var);
else if (m_metaData)
hr = m_metaData->GetProperty(reinterpret_cast<LPCWSTR>(m_commonNames[index].utf16()), &var);
if (SUCCEEDED(hr))
value = convertValue(var);
PropVariantClear(&var);
return value;
}
QVariant MFMetaDataControl::convertValue(const PROPVARIANT& var) const
{
QVariant value;
//form MSDN: http://msdn.microsoft.com/en-us/library/ff384862%28v=VS.85%29.aspx
//it seems that those 4 types are enough for media foundation metadata
//add more later if necessary
switch (var.vt) {
case VT_LPWSTR:
value = QString::fromUtf16(reinterpret_cast<const ushort*>(var.pwszVal));
break;
case VT_UI4:
value = uint(var.ulVal);
break;
case VT_UI8:
value = qulonglong(var.uhVal.QuadPart);
break;
case VT_BOOL:
value = bool(var.boolVal);
break;
}
return value;
}
QStringList MFMetaDataControl::availableMetaData() const
{
return m_availableMetaDatas;
}
void MFMetaDataControl::updateSource(IMFPresentationDescriptor* sourcePD, IMFMediaSource* mediaSource)
{
if (m_metaData) {
m_metaData->Release();
m_metaData = 0;
}
if (m_content) {
m_content->Release();
m_content = 0;
}
m_availableMetaDatas.clear();
m_commonKeys.clear();
m_commonNames.clear();
if (SUCCEEDED(MFGetService(mediaSource, MF_PROPERTY_HANDLER_SERVICE, IID_PPV_ARGS(&m_content)))) {
DWORD cProps;
if (SUCCEEDED(m_content->GetCount(&cProps))) {
for (DWORD i = 0; i < cProps; i++)
{
PROPERTYKEY key;
if (FAILED(m_content->GetAt(i, &key)))
continue;
bool common = true;
if (key == PKEY_Author) {
m_availableMetaDatas.push_back(QMediaMetaData::Author);
} else if (key == PKEY_Title) {
m_availableMetaDatas.push_back(QMediaMetaData::Title);
} else if (key == PKEY_ParentalRating) {
m_availableMetaDatas.push_back(QMediaMetaData::ParentalRating);
} else if (key == PKEY_Comment) {
m_availableMetaDatas.push_back(QMediaMetaData::Description);
} else if (key == PKEY_Copyright) {
m_availableMetaDatas.push_back(QMediaMetaData::Copyright);
//TODO: add more common keys
} else {
common = false;
//TODO: add more extended keys
}
if (common)
m_commonKeys.push_back(key);
}
} else {
m_content->Release();
m_content = NULL;
}
}
if (!m_content) {
//fallback to Vista approach
IMFMetadataProvider *provider = NULL;
if (SUCCEEDED(MFGetService(mediaSource, MF_METADATA_PROVIDER_SERVICE, IID_PPV_ARGS(&provider)))) {
if (SUCCEEDED(provider->GetMFMetadata(sourcePD, 0, 0, &m_metaData))) {
PROPVARIANT varNames;
PropVariantInit(&varNames);
if (SUCCEEDED(m_metaData->GetAllPropertyNames(&varNames)) && varNames.vt == (VT_VECTOR | VT_LPWSTR)) {
ULONG cElements = varNames.calpwstr.cElems;
for (ULONG i = 0; i < cElements; i++)
{
const WCHAR* sName = varNames.calpwstr.pElems[i];
#ifdef DEBUG_MEDIAFOUNDATION
qDebug() << "metadata: " << QString::fromUtf16(sName);
#endif
if (wcscmp(sName, L"Author") == 0) {
m_availableMetaDatas.push_back(QMediaMetaData::Author);
} else if (wcscmp(sName, L"Title") == 0) {
m_availableMetaDatas.push_back(QMediaMetaData::Title);
} else if (wcscmp(sName, L"Rating") == 0) {
m_availableMetaDatas.push_back(QMediaMetaData::ParentalRating);
} else if (wcscmp(sName, L"Description") == 0) {
m_availableMetaDatas.push_back(QMediaMetaData::Description);
} else if (wcscmp(sName, L"Copyright") == 0) {
m_availableMetaDatas.push_back(QMediaMetaData::Copyright);
//TODO: add more common keys
} else {
m_availableMetaDatas.push_back(QString::fromUtf16(reinterpret_cast<const ushort*>(sName)));
}
m_commonNames.push_back(QString::fromUtf16(reinterpret_cast<const ushort*>(sName)));
}
}
PropVariantClear(&varNames);
} else {
qWarning("Failed to get IMFMetadata");
}
provider->Release();
} else {
qWarning("Failed to get IMFMetadataProvider from source");
}
}
emit metaDataChanged();
emit metaDataAvailableChanged(m_metaData || m_content);
}
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