diff options
Diffstat (limited to 'plugins/multimedia/symbian/videooutput/s60videoframerate.cpp')
-rw-r--r-- | plugins/multimedia/symbian/videooutput/s60videoframerate.cpp | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/plugins/multimedia/symbian/videooutput/s60videoframerate.cpp b/plugins/multimedia/symbian/videooutput/s60videoframerate.cpp new file mode 100644 index 0000000000..936052bf0f --- /dev/null +++ b/plugins/multimedia/symbian/videooutput/s60videoframerate.cpp @@ -0,0 +1,101 @@ +/** +** Copyright (C) 2011 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. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 "s60videoframerate.h" +#include <QtCore/QDebug> +#include <QtCore/QTimer> + +static const int HistoryLength = 5; +static const int SamplingInterval = 100; +static const int TraceInterval = 2000; + +S60VideoFrameRate::S60VideoFrameRate(QObject *parent) + : QObject(parent) + , m_sampleTimer(new QTimer(this)) + , m_traceTimer(new QTimer(this)) + , m_elapsedTimer(new QElapsedTimer) + , m_count(0) + , m_history(HistoryLength, 0.0) + , m_historyIndex(0) + , m_historyCount(0) + , m_frequency(0.0) + , m_frequencySum(0.0) +{ + connect(m_sampleTimer, SIGNAL(timeout()), this, SLOT(sample())); + m_sampleTimer->start(SamplingInterval); + connect(m_traceTimer, SIGNAL(timeout()), this, SLOT(trace())); + m_traceTimer->start(TraceInterval); + m_elapsedTimer->start(); +} + +S60VideoFrameRate::~S60VideoFrameRate() +{ + +} + +qreal S60VideoFrameRate::frequency() const +{ + return m_frequency; +} + +void S60VideoFrameRate::notify() +{ + ++m_count; +} + +void S60VideoFrameRate::sample() +{ + const int ms = m_elapsedTimer->restart(); + const qreal freq = qreal(m_count * 1000) / ms; + m_frequencySum -= m_history[m_historyIndex]; + m_frequencySum += freq; + m_history[m_historyIndex] = freq; + m_historyIndex = (m_historyIndex + 1) % m_history.count(); + if (m_historyCount < m_history.count()) + ++m_historyCount; + m_frequency = m_frequencySum / m_historyCount; + emit frequencyChanged(m_frequency); + m_count = 0; +} + +void S60VideoFrameRate::trace() +{ + qDebug() << "S60VideoFrameRate" << m_frequency << "fps"; +} |