qt/src/sequencerThread.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2009 by Alex Montgomery and Nedko Arnaudov   *
   3  *   check@Adaon   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 #include "sequencerThread.h"
  22 #include <QMutexLocker>
  23 #include <QPointer>
  24
  25 SequencerThread::SequencerThread(QObject* parent, MidiSettings* settings, QMutex* settingsMutex)
  26    : QThread(parent), m_settings(settings), m_settingsMutex(settingsMutex), m_shouldExit(0)
  27 {
  28 }
  29
  30 void SequencerThread::listen(bool realTime)
  31 {
  32    // note: this probably won't actually be an RT thread, but it's as close as QThread will allow
  33    if (realTime)
  34       start(QThread::TimeCriticalPriority);
  35    else
  36       start();
  37 }
  38
  39 void SequencerThread::run ()
  40 {
  41    g_quit = 0;
  42    quint8* midiData = 0;
  43
  44    QPointer <SequencerThread> stillAlive(this);
  45    while(!g_quit && !stillAlive.isNull() && !m_shouldExit)
  46    {
  47       midiData = get_midi_input();
  48       if (midiData && !stillAlive.isNull())
  49       {
  50          QMutexLocker settingsLocker(m_settingsMutex);
  51          handle_midi(midiData, m_settings);
  52       }
  53    }
  54
  55    // not ideal, but we need to dispose of ourself once we're out of the loop. If we don't
  56    // calling deleteLater from mainWindow after SequencerThread::die still causes a segfault
  57    deleteLater();
  58 }
  59
  60 void SequencerThread::die()
  61 {
  62    m_shouldExit = 1;
  63 }