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Diffstat (limited to 'plugins/multimedia/blackberry/bbmetadata.cpp')
| -rw-r--r-- | plugins/multimedia/blackberry/bbmetadata.cpp | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/plugins/multimedia/blackberry/bbmetadata.cpp b/plugins/multimedia/blackberry/bbmetadata.cpp new file mode 100644 index 0000000000..74f61ef2e9 --- /dev/null +++ b/plugins/multimedia/blackberry/bbmetadata.cpp @@ -0,0 +1,166 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Research In Motion +** +** Contact: Research In Motion <blackberry-qt@qnx.com> +** Contact: Klarälvdalens Datakonsult AB <info@kdab.com> +** +** This file is part of the Qt Mobility Components. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** 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. +** +** 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. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ +#include "bbmetadata.h" + +#include <QtCore/qdebug.h> +#include <QtCore/qfile.h> +#include <QtCore/qstringlist.h> + +QT_BEGIN_NAMESPACE + +BbMetaData::BbMetaData() +{ + clear(); +} + +static const char * durationKey = "md_title_duration"; +static const char * widthKey = "md_video_width"; +static const char * heightKey = "md_video_height"; +static const char * mediaTypeKey = "md_title_mediatype"; +static const char * pixelWidthKey = "md_video_pixel_height"; +static const char * pixelHeightKey = "md_video_pixel_width"; + +static const int mediaTypeAudioFlag = 4; +static const int mediaTypeVideoFlag = 2; + +bool BbMetaData::parse(const QString &contextName) +{ + clear(); + QString fileName = + QString("/pps/services/multimedia/renderer/context/%1/metadata").arg(contextName); + + // In newer OS versions, the filename is "metadata0", not metadata, so try both. + if (!QFile::exists(fileName)) + fileName += '0'; + + QFile metaDataFile(fileName); + if (!metaDataFile.open(QFile::ReadOnly)) { + qWarning() << "Unable to open media metadata file" << fileName << ":" + << metaDataFile.errorString(); + return false; + } + + const QString seperator("::"); + QTextStream stream(&metaDataFile); + Q_FOREVER { + const QString line = stream.readLine(); + if (line.isNull()) + break; + + const int seperatorPos = line.indexOf(seperator); + if (seperatorPos != -1) { + const QString key = line.left(seperatorPos); + const QString value = line.mid(seperatorPos + seperator.length()); + + if (key == durationKey) + m_duration = value.toLongLong(); + else if (key == widthKey) + m_width = value.toInt(); + else if (key == heightKey) + m_height = value.toInt(); + else if (key == mediaTypeKey) + m_mediaType = value.toInt(); + else if (key == pixelWidthKey) + m_pixelWidth = value.toFloat(); + else if (key == pixelHeightKey) + m_pixelHeight = value.toFloat(); + } + } + + return true; +} + +void BbMetaData::clear() +{ + m_duration = 0; + m_height = 0; + m_width = 0; + m_mediaType = -1; + m_pixelWidth = 1; + m_pixelHeight = 1; +} + +qlonglong BbMetaData::duration() const +{ + return m_duration; +} + +// Handling of pixel aspect ratio +// +// If the pixel aspect ratio is different from 1:1, it means the video needs to be stretched in +// order to look natural. +// For example, if the pixel width is 2, and the pixel height is 1, it means a video of 300x200 +// pixels needs to be displayed as 600x200 to look correct. +// In order to support this the easiest way, we simply pretend that the actual size of the video +// is 600x200, which will cause the video to be displayed in an aspect ratio of 3:1 instead of 3:2, +// and therefore look correct. + +int BbMetaData::height() const +{ + return m_height * m_pixelHeight; +} + +int BbMetaData::width() const +{ + return m_width * m_pixelWidth; +} + +bool BbMetaData::hasVideo() const +{ + // By default, assume no video if we can't extract the information + if (m_mediaType == -1) + return false; + + return (m_mediaType & mediaTypeVideoFlag); +} + +bool BbMetaData::hasAudio() const +{ + // By default, assume audio only if we can't extract the information + if (m_mediaType == -1) + return true; + + return (m_mediaType & mediaTypeAudioFlag); +} + +QT_END_NAMESPACE |