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/****************************************************************************
**
** Copyright (C) 2012 Research In Motion
** Contact: http://www.qt-project.org/legal
**
** 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 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 "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 separator("::");
QTextStream stream(&metaDataFile);
Q_FOREVER {
const QString line = stream.readLine();
if (line.isNull())
break;
const int separatorPos = line.indexOf(separator);
if (separatorPos != -1) {
const QString key = line.left(separatorPos);
const QString value = line.mid(separatorPos + separator.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
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