fpstimer.cpp revision 21939df44de1705786c545cd1bf519d47250322d
18e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project/* 221939df44de1705786c545cd1bf519d47250322dBen Murdoch * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies) 321939df44de1705786c545cd1bf519d47250322dBen Murdoch * 421939df44de1705786c545cd1bf519d47250322dBen Murdoch * All rights reserved. 58e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 68e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Redistribution and use in source and binary forms, with or without 78e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * modification, are permitted provided that the following conditions 88e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * are met: 98e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 108e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * notice, this list of conditions and the following disclaimer. 118e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 128e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 138e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * documentation and/or other materials provided with the distribution. 148e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 158e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 168e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 178e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 188e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 198e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 208e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 218e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 228e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 238e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 248e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2521939df44de1705786c545cd1bf519d47250322dBen Murdoch * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 268e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project */ 278e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2821939df44de1705786c545cd1bf519d47250322dBen Murdoch#include "fpstimer.h" 298e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 3021939df44de1705786c545cd1bf519d47250322dBen Murdoch#include <QDateTime> 3121939df44de1705786c545cd1bf519d47250322dBen Murdoch#include <QTimerEvent> 328e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 3321939df44de1705786c545cd1bf519d47250322dBen Murdoch// We save a maximum of 10000 frames, and purge 2000 at a time 3421939df44de1705786c545cd1bf519d47250322dBen Murdoch#define MAX_FRAMES_SAVED 10000 3521939df44de1705786c545cd1bf519d47250322dBen Murdoch#define FRAMES_TO_PURGE_WHEN_FULL 2000 3621939df44de1705786c545cd1bf519d47250322dBen Murdoch// 60 FPS 3721939df44de1705786c545cd1bf519d47250322dBen Murdoch#define FPS_MEASURE_INTERVAL 1000 / 60 388e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 3921939df44de1705786c545cd1bf519d47250322dBen MurdochFpsTimer::FpsTimer(QObject* parent) 4021939df44de1705786c545cd1bf519d47250322dBen Murdoch : QObject(parent) 418e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 428e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 438e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 4421939df44de1705786c545cd1bf519d47250322dBen Murdochint FpsTimer::numFrames(int spanMillis) 450bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch{ 4621939df44de1705786c545cd1bf519d47250322dBen Murdoch const QTime now = QTime::currentTime(); 470bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 4821939df44de1705786c545cd1bf519d47250322dBen Murdoch int count = 0; 4921939df44de1705786c545cd1bf519d47250322dBen Murdoch for (int i = m_frames.length() - 1; i >= 0; --i, ++count) { 5021939df44de1705786c545cd1bf519d47250322dBen Murdoch int msecs = m_frames[i].msecsTo(now); 5121939df44de1705786c545cd1bf519d47250322dBen Murdoch if (msecs < 0) 5221939df44de1705786c545cd1bf519d47250322dBen Murdoch msecs += 24 * 60 * 60 * 1000; 5321939df44de1705786c545cd1bf519d47250322dBen Murdoch if (msecs > spanMillis) 5421939df44de1705786c545cd1bf519d47250322dBen Murdoch break; 5521939df44de1705786c545cd1bf519d47250322dBen Murdoch } 5621939df44de1705786c545cd1bf519d47250322dBen Murdoch return count; 578e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 588e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 5921939df44de1705786c545cd1bf519d47250322dBen Murdochvoid FpsTimer::start() 608e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 6121939df44de1705786c545cd1bf519d47250322dBen Murdoch m_timer = startTimer(FPS_MEASURE_INTERVAL); 628e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 638e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 6421939df44de1705786c545cd1bf519d47250322dBen Murdochvoid FpsTimer::stop() 658e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 6621939df44de1705786c545cd1bf519d47250322dBen Murdoch killTimer(m_timer); 6721939df44de1705786c545cd1bf519d47250322dBen Murdoch m_frames.clear(); 688e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 698e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 7021939df44de1705786c545cd1bf519d47250322dBen Murdochvoid FpsTimer::timerEvent(QTimerEvent* event) 718e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 7221939df44de1705786c545cd1bf519d47250322dBen Murdoch if (event->timerId() != m_timer) 7321939df44de1705786c545cd1bf519d47250322dBen Murdoch return; 7421939df44de1705786c545cd1bf519d47250322dBen Murdoch m_frames.append(QTime::currentTime()); 7521939df44de1705786c545cd1bf519d47250322dBen Murdoch if (m_frames.length() > MAX_FRAMES_SAVED) 7621939df44de1705786c545cd1bf519d47250322dBen Murdoch m_frames.erase(m_frames.begin(), m_frames.begin() + FRAMES_TO_PURGE_WHEN_FULL); 778e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 78