midiplayer.h

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/*****************************************************************************
 * Copyright 2016-2017 Karolin Stange, Christoph Wick, and Haye Hinrichsen
 *
 * This file is part of JustIntonation.
 *
 * JustIntonation is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * JustIntonation is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along 
 * with JustIntonation. If not, see http://www.gnu.org/licenses/.
 *****************************************************************************/

//=============================================================================
//                              Midi Player
//=============================================================================

#ifndef MIDIPLAYER_H
#define MIDIPLAYER_H


#include <QVariant>
#include <QTimer>
#include <QMidiMessage>

#include "midiplayereventlist.h"
#include "midiplayerparser.h"
#include "../../application/modules/system/threadbase.h"


class MidiPlayer : public ThreadBase
{
    Q_OBJECT
public:
    MidiPlayer();                       // Constructor
    bool stop();                        // Stop thread
    bool isPlaying() const;             // returns true if playing
    void suspend();
    void resume();

signals:
    void signalMidiEvent (QMidiMessage event);
    void signalPlayingStatusChanged (QVariant playing);
    void signalProgressInPercent (QVariant percent);
    void signalError (QVariant msg);

public slots:
    void loadFile (QString filename, bool autostart=false);   // Load a song from a file
    void loadUrl (QString url);         // Load a song from a file (specify url)
    void setTempo (double factor);      // Change tempo by a scale factor (1=100%)
    void setMidiProgress(double percent);// Set progress
    void rewind();                      // Go back to beginning
    void togglePlayPause();             // Toggle between play and pause
    void setRepeatMode(bool on);        // Repeat midi file if ended
    void play();
    void pause();

    void receiveTempoData (bool smpte, double parameter);
    void reportError (QString msg);

private slots:
    void readAndParseMidiFile (QString filename, bool autostart);
signals:
    void helperSignalToReadMidiFile (QString filename, bool autostart);
    void setDisplayedMidiFilename (QVariant filename);

private:
    void allNotesOff();
    void setTempoFactor (double tempo);
    void midiTimeout();

    MidiPlayerEventList mEventList;
    bool mCurrentlyPlaying;             
    bool mRepeatMode;                   
    bool mPlayAgainAfterSuspend;        
    bool mTimerActive;                  
    double mOverallTempoFactor;         
    quint64 mDeltaTicks;                
    double mMillisecondsPerTick;        
    double mTicksPerQuarterNote;        
    double mAccumulatedTime;            
};

#endif // MIDIPLAYER_H