ground/gcs/src/libs/utils/logfile.h

   1 /**
   2  ******************************************************************************
   3  *
   4  * @file       logfile.h
   5  * @author     The LibrePilot Project, http://www.librepilot.org Copyright (C) 2017.
   6  *             The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
   7  * @see        The GNU Public License (GPL) Version 3
   8  *
   9  *****************************************************************************/
  10 /*
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 3 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  18  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  19  * for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License along
  22  * with this program; if not, write to the Free Software Foundation, Inc.,
  23  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  24  */
  25 #ifndef LOGFILE_H
  26 #define LOGFILE_H
  27
  28 #include "utils_global.h"
  29
  30 #include <QIODevice>
  31 #include <QTime>
  32 #include <QTimer>
  33 #include <QMutexLocker>
  34 #include <QDebug>
  35 #include <QBuffer>
  36 #include <QFile>
  37
  38 class QTCREATOR_UTILS_EXPORT LogFile : public QIODevice {
  39     Q_OBJECT
  40 public:
  41     explicit LogFile(QObject *parent = 0);
  42
  43     QString fileName() const
  44     {
  45         return m_file.fileName();
  46     };
  47     void setFileName(QString name)
  48     {
  49         m_file.setFileName(name);
  50     };
  51
  52     bool isSequential() const;
  53
  54     bool isPlaying() const;
  55
  56     bool open(OpenMode mode);
  57     void close();
  58
  59     qint64 bytesAvailable() const;
  60     qint64 bytesToWrite() const
  61     {
  62         return m_file.bytesToWrite();
  63     };
  64
  65     qint64 writeData(const char *data, qint64 dataSize);
  66     qint64 readData(char *data, qint64 maxlen);
  67
  68     void useProvidedTimeStamp(bool useProvidedTimeStamp)
  69     {
  70         m_useProvidedTimeStamp = useProvidedTimeStamp;
  71     }
  72
  73     void setNextTimeStamp(quint32 providedTimestamp)
  74     {
  75         m_providedTimeStamp = providedTimestamp;
  76     }
  77
  78 public slots:
  79     void setReplaySpeed(double val)
  80     {
  81         m_playbackSpeed = val;
  82         qDebug() << "Playback speed is now" << m_playbackSpeed;
  83     };
  84     bool startReplay();
  85     bool stopReplay();
  86     bool pauseReplay();
  87     bool resumeReplay();
  88
  89 protected slots:
  90     void timerFired();
  91
  92 signals:
  93     void readReady();
  94     void replayStarted();
  95     void replayFinished();
  96
  97 protected:
  98     QByteArray m_dataBuffer;
  99     QTimer m_timer;
 100     QTime m_myTime;
 101     QFile m_file;
 102     qint32 m_previousTimeStamp;
 103     qint32 m_nextTimeStamp;
 104     double m_lastPlayed;
 105     // QMutex wants to be mutable
 106     // http://stackoverflow.com/questions/25521570/can-mutex-locking-function-be-marked-as-const
 107     mutable QMutex m_mutex;
 108
 109     int m_timeOffset;
 110     double m_playbackSpeed;
 111     bool paused;
 112
 113 private:
 114     bool m_useProvidedTimeStamp;
 115     qint32 m_providedTimeStamp;
 116 };
 117
 118 #endif // LOGFILE_H