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Diffstat (limited to 'examples/multimedia/video/snippets/frequencymonitor/frequencymonitor.cpp')
| -rw-r--r-- | examples/multimedia/video/snippets/frequencymonitor/frequencymonitor.cpp | 257 |
1 files changed, 0 insertions, 257 deletions
diff --git a/examples/multimedia/video/snippets/frequencymonitor/frequencymonitor.cpp b/examples/multimedia/video/snippets/frequencymonitor/frequencymonitor.cpp deleted file mode 100644 index d611497fe..000000000 --- a/examples/multimedia/video/snippets/frequencymonitor/frequencymonitor.cpp +++ /dev/null @@ -1,257 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the Qt Mobility Components. -** -** $QT_BEGIN_LICENSE:BSD$ -** 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 The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** BSD License Usage -** Alternatively, you may use this file under the terms of the BSD license -** as follows: -** -** "Redistribution and use in source and binary forms, with or without -** modification, are permitted provided that the following conditions are -** met: -** * Redistributions of source code must retain the above copyright -** notice, this list of conditions and the following disclaimer. -** * Redistributions in binary form must reproduce the above copyright -** notice, this list of conditions and the following disclaimer in -** the documentation and/or other materials provided with the -** distribution. -** * Neither the name of The Qt Company Ltd nor the names of its -** contributors may be used to endorse or promote products derived -** from this software without specific prior written permission. -** -** -** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "frequencymonitor.h" -#include <QDebug> -#include <QElapsedTimer> -#include <QString> -#include <QTime> -#include <QTimer> - -//#define VERBOSE_TRACE - -inline QDebug qtTrace() { return qDebug() << "[frequencymonitor]"; } -#ifdef VERBOSE_TRACE -inline QDebug qtVerboseTrace() { return qtTrace(); } -#else -inline QNoDebug qtVerboseTrace() { return QNoDebug(); } -#endif - -static const int DefaultSamplingInterval = 100; -static const int DefaultTraceInterval = 0; - -class FrequencyMonitorPrivate : public QObject -{ - Q_OBJECT - -public: - FrequencyMonitorPrivate(FrequencyMonitor *parent); - void calculateInstantaneousFrequency(); - -private slots: - void calculateAverageFrequency(); - void stalled(); - -public: - FrequencyMonitor *const q_ptr; - QString m_label; - bool m_active; - qreal m_instantaneousFrequency; - QElapsedTimer m_instantaneousElapsed; - QTimer *m_averageTimer; - QElapsedTimer m_averageElapsed; - int m_count; - qreal m_averageFrequency; - QTimer *m_traceTimer; - QTimer *m_stalledTimer; -}; - -FrequencyMonitorPrivate::FrequencyMonitorPrivate(FrequencyMonitor *parent) -: QObject(parent) -, q_ptr(parent) -, m_active(false) -, m_instantaneousFrequency(0) -, m_averageTimer(new QTimer(this)) -, m_count(0) -, m_averageFrequency(0) -, m_traceTimer(new QTimer(this)) -, m_stalledTimer(new QTimer(this)) -{ - m_instantaneousElapsed.start(); - connect(m_averageTimer, &QTimer::timeout, - this, &FrequencyMonitorPrivate::calculateAverageFrequency); - if (DefaultSamplingInterval) - m_averageTimer->start(DefaultSamplingInterval); - m_averageElapsed.start(); - connect(m_traceTimer, &QTimer::timeout, - q_ptr, &FrequencyMonitor::trace); - if (DefaultTraceInterval) - m_traceTimer->start(DefaultTraceInterval); - m_stalledTimer->setSingleShot(true); - connect(m_stalledTimer, &QTimer::timeout, - this, &FrequencyMonitorPrivate::stalled); -} - -void FrequencyMonitorPrivate::calculateInstantaneousFrequency() -{ - const qint64 ms = m_instantaneousElapsed.restart(); - m_instantaneousFrequency = ms ? qreal(1000) / ms : 0; - m_stalledTimer->start(3 * ms); - if (m_instantaneousFrequency) - q_ptr->setActive(true); - emit q_ptr->instantaneousFrequencyChanged(m_instantaneousFrequency); - emit q_ptr->frequencyChanged(); -} - -void FrequencyMonitorPrivate::calculateAverageFrequency() -{ - const qint64 ms = m_averageElapsed.restart(); - m_averageFrequency = qreal(m_count * 1000) / ms; - emit q_ptr->averageFrequencyChanged(m_averageFrequency); - emit q_ptr->frequencyChanged(); - m_count = 0; -} - -void FrequencyMonitorPrivate::stalled() -{ - if (m_instantaneousFrequency) { - m_instantaneousFrequency = 0; - emit q_ptr->instantaneousFrequencyChanged(m_instantaneousFrequency); - emit q_ptr->frequencyChanged(); - } -} - -FrequencyMonitor::FrequencyMonitor(QObject *parent) -: QObject(parent) -{ - d_ptr = new FrequencyMonitorPrivate(this); -} - -FrequencyMonitor::~FrequencyMonitor() -{ - -} - -QString FrequencyMonitor::label() const -{ - return d_func()->m_label; -} - -bool FrequencyMonitor::active() const -{ - return d_func()->m_active; -} - -int FrequencyMonitor::samplingInterval() const -{ - return d_ptr->m_averageTimer->isActive() ? d_ptr->m_averageTimer->interval() : 0; -} - -int FrequencyMonitor::traceInterval() const -{ - return d_ptr->m_traceTimer->isActive() ? d_ptr->m_traceTimer->interval() : 0; -} - -qreal FrequencyMonitor::instantaneousFrequency() const -{ - return d_func()->m_instantaneousFrequency; -} - -qreal FrequencyMonitor::averageFrequency() const -{ - return d_func()->m_averageFrequency; -} - -void FrequencyMonitor::notify() -{ - Q_D(FrequencyMonitor); - ++(d->m_count); - d->calculateInstantaneousFrequency(); -} - -void FrequencyMonitor::trace() -{ - Q_D(FrequencyMonitor); - const QString value = QString::fromLatin1("instant %1 average %2") - .arg(d->m_instantaneousFrequency, 0, 'f', 2) - .arg(d->m_averageFrequency, 0, 'f', 2); - if (d->m_label.isEmpty()) - qtTrace() << "FrequencyMonitor::trace" << value; - else - qtTrace() << "FrequencyMonitor::trace" << "label" << d->m_label << value; -} - -void FrequencyMonitor::setLabel(const QString &value) -{ - Q_D(FrequencyMonitor); - if (d->m_label != value) { - d->m_label = value; - emit labelChanged(d->m_label); - } -} - -void FrequencyMonitor::setActive(bool value) -{ - Q_D(FrequencyMonitor); - if (d->m_active != value) { - d->m_active = value; - emit activeChanged(d->m_active); - } -} - -void FrequencyMonitor::setSamplingInterval(int value) -{ - Q_D(FrequencyMonitor); - if (samplingInterval() != value) { - if (value) { - d->m_averageTimer->setInterval(value); - d->m_averageTimer->start(); - } else { - d->m_averageTimer->stop(); - } - emit samplingIntervalChanged(value); - } -} - -void FrequencyMonitor::setTraceInterval(int value) -{ - Q_D(FrequencyMonitor); - if (traceInterval() != value) { - if (value) { - d->m_traceTimer->setInterval(value); - d->m_traceTimer->start(); - } else { - d->m_traceTimer->stop(); - } - emit traceIntervalChanged(value); - } -} - -#include "frequencymonitor.moc" |