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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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2
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3 /*
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4 Sonic Visualiser
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5 An audio file viewer and annotation editor.
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6 Centre for Digital Music, Queen Mary, University of London.
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7 This file copyright 2006-2009 Chris Cannam and QMUL.
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8
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9 This program is free software; you can redistribute it and/or
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10 modify it under the terms of the GNU General Public License as
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11 published by the Free Software Foundation; either version 2 of the
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12 License, or (at your option) any later version. See the file
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13 COPYING included with this distribution for more information.
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14 */
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15
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16 #include "MIDIInput.h"
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17
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18 #include "rtmidi/RtMidi.h"
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19
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20 MIDIInput::MIDIInput(QString name) :
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21 m_rtmidi(),
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22 m_buffer(1023)
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23 {
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24 try {
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25 m_rtmidi = new RtMidiIn(name.toStdString());
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26 m_rtmidi->setCallback(staticCallback, this);
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27 m_rtmidi->openPort();
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28 } catch (RtError e) {
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29 e.printMessage();
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30 delete m_rtmidi;
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31 m_rtmidi = 0;
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32 }
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33 }
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34
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35 MIDIInput::~MIDIInput()
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36 {
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37 delete m_rtmidi;
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38 }
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39
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40 void
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41 MIDIInput::staticCallback(double timestamp, std::vector<unsigned char> *message,
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42 void *userData)
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43 {
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44 ((MIDIInput *)userData)->callback(timestamp, message);
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45 }
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46
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47 void
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48 MIDIInput::callback(double timestamp, std::vector<unsigned char> *message)
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49 {
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50 std::cerr << "MIDIInput::callback(" << timestamp << ")" << std::endl;
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51
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52 }
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53
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54 MIDIEvent
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55 MIDIInput::readEvent()
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56 {
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57 MIDIEvent *event = m_buffer.readOne();
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58 MIDIEvent revent = *event;
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59 delete event;
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60 return revent;
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61 }
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62
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63 void
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64 MIDIInput::postEvent(MIDIEvent e)
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65 {
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66 int count = 0, max = 5;
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67 while (m_buffer.getWriteSpace() == 0) {
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68 if (count == max) {
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69 std::cerr << "ERROR: MIDIInput::postEvent: MIDI event queue is full and not clearing -- abandoning incoming event" << std::endl;
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70 return;
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71 }
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72 std::cerr << "WARNING: MIDIInput::postEvent: MIDI event queue (capacity " << m_buffer.getSize() << " is full!" << std::endl;
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73 std::cerr << "Waiting for something to be processed" << std::endl;
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74 #ifdef _WIN32
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75 Sleep(1);
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76 #else
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77 sleep(1);
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78 #endif
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79 count++;
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80 }
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81
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82 MIDIEvent *me = new MIDIEvent(e);
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83 m_buffer.write(&me, 1);
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84 emit eventsAvailable();
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85 }
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86
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