Simple MIDI file reader

/*

    This file copyright 2010 Chris Cannam.

    Permission is hereby granted, free of charge, to any person

    obtaining a copy of this software and associated documentation

    files (the "Software"), to deal in the Software without

    restriction, including without limitation the rights to use, copy,

    modify, merge, publish, distribute, sublicense, and/or sell copies

    of the Software, and to permit persons to whom the Software is

    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be

    included in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR

    ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF

    CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

    Except as contained in this notice, the names of the authors

    shall not be used in advertising or otherwise to promote the sale,

    use or other dealings in this Software without prior written

    authorization.

*/

#include "MIDIFileReader.h"

#include <iostream>

using namespace std;

using namespace MIDIConstants;

int main(int argc, char **argv)

{

    if (argc != 2) {

        cerr << "Usage: midifile <file.mid>" << endl;

        return 1;

    }

    std::string filename = argv[1];

    MIDIFileReader fr(filename);

    if (!fr.isOK()) {

        std::cerr << "Error: " << fr.getError().c_str() << std::endl;

        return 1;

    }

    MIDIComposition c = fr.load();

    switch (fr.getFormat()) {

    case MIDI_SINGLE_TRACK_FILE: cout << "Format: MIDI Single Track File" << endl; break;

    case MIDI_SIMULTANEOUS_TRACK_FILE: cout << "Format: MIDI Simultaneous Track File" << endl; break;

    case MIDI_SEQUENTIAL_TRACK_FILE: cout << "Format: MIDI Sequential Track File" << endl; break;

    default: cout << "Format: Unknown MIDI file format?" << endl; break;

    }

    cout << "Tracks: " << c.size() << endl;

    int td = fr.getTimingDivision();

    if (td < 32768) {

        cout << "Timing division: " << fr.getTimingDivision() << " ppq" << endl;

    } else {

        int frames = 256 - (td >> 8);

        int subframes = td & 0xff;

        cout << "SMPTE timing: " << frames << " fps, " << subframes << " subframes" << endl;

    }

    for (MIDIComposition::const_iterator i = c.begin(); i != c.end(); ++i) {

        cout << "Start of track: " << i->first+1 << endl;

        for (MIDITrack::const_iterator j = i->second.begin(); j != i->second.end(); ++j) {

            unsigned int t = j->getTime();

            int ch = j->getChannelNumber();

            if (j->isMeta()) {

                int code = j->getMetaEventCode();

                string name;

                bool printable = true;

                switch (code) {

                case MIDI_END_OF_TRACK:

                    cout << t << ": End of track" << endl;

                    break;

                case MIDI_TEXT_EVENT: name = "Text"; break;

                case MIDI_COPYRIGHT_NOTICE: name = "Copyright"; break;

                case MIDI_TRACK_NAME: name = "Track name"; break;

                case MIDI_INSTRUMENT_NAME: name = "Instrument name"; break;

                case MIDI_LYRIC: name = "Lyric"; break;

                case MIDI_TEXT_MARKER: name = "Text marker"; break;

                case MIDI_SEQUENCE_NUMBER: name = "Sequence number"; printable = false; break;

                case MIDI_CHANNEL_PREFIX_OR_PORT: name = "Channel prefix or port"; printable = false; break;

                case MIDI_CUE_POINT: name = "Cue point"; break;

                case MIDI_CHANNEL_PREFIX: name = "Channel prefix"; printable = false; break;

                case MIDI_SEQUENCER_SPECIFIC: name = "Sequencer specific"; printable = false; break;

                case MIDI_SMPTE_OFFSET: name = "SMPTE offset"; printable = false; break;

                case MIDI_SET_TEMPO:

                {

                    unsigned char m0 = j->getMetaMessage()[0];

                    unsigned char m1 = j->getMetaMessage()[1];

                    unsigned char m2 = j->getMetaMessage()[2];

                    long tempo = (((m0 << 8) + m1) << 8) + m2;

                    cout << t << ": Tempo: " << 60000000.0 / double(tempo) << endl;

                }

                    break;

                case MIDI_TIME_SIGNATURE:

                {

                    int numerator = j->getMetaMessage()[0];

                    int denominator = 1 << (int)j->getMetaMessage()[1];

                    cout << t << ": Time signature: " << numerator << "/" << denominator << endl;

                }

                case MIDI_KEY_SIGNATURE:

                {

                    int accidentals = j->getMetaMessage()[0];

                    int isMinor = j->getMetaMessage()[1];

                    bool isSharp = accidentals < 0 ? false : true;

                    accidentals = accidentals < 0 ? -accidentals : accidentals;

                    cout << t << ": Key signature: " << accidentals << " "

                         << (isSharp ?

                             (accidentals > 1 ? "sharps" : "sharp") :

                             (accidentals > 1 ? "flats" : "flat"))

                         << (isMinor ? ", minor" : ", major") << endl;

                }

                }

                if (name != "") {

                    if (printable) {

                        cout << t << ": File meta event: code " << code

                             << ": " << name << ": \"" << j->getMetaMessage()

                             << "\"" << endl;

                    } else {

                        cout << t << ": File meta event: code " << code

                             << ": " << name << ": ";

                        for (int k = 0; k < j->getMetaMessage().length(); ++k) {

                            cout << (int)j->getMetaMessage()[k] << " ";

                        }

                    }

                }

                continue;

            }

            switch (j->getMessageType()) {

            case MIDI_NOTE_ON:

                cout << t << ": Note: channel " << ch

                     << " duration " << j->getDuration()

                     << " pitch " << j->getPitch()

                     << " velocity " << j->getVelocity() << endl;

                break;

            case MIDI_POLY_AFTERTOUCH:

                cout << t << ": Polyphonic aftertouch: channel " << ch

                     << " pitch " << j->getPitch()

                     << " pressure " << j->getData2() << endl;

                break;

            case MIDI_CTRL_CHANGE:

            {

                int controller = j->getData1();

                string name;

                switch (controller) {

                case MIDI_CONTROLLER_BANK_MSB: name = "Bank select MSB"; break;

                case MIDI_CONTROLLER_VOLUME: name = "Volume"; break;

                case MIDI_CONTROLLER_BANK_LSB: name = "Bank select LSB"; break;

                case MIDI_CONTROLLER_MODULATION: name = "Modulation wheel"; break;

                case MIDI_CONTROLLER_PAN: name = "Pan"; break;

                case MIDI_CONTROLLER_SUSTAIN: name = "Sustain"; break;

                case MIDI_CONTROLLER_RESONANCE: name = "Resonance"; break;

                case MIDI_CONTROLLER_RELEASE: name = "Release"; break;

                case MIDI_CONTROLLER_ATTACK: name = "Attack"; break;

                case MIDI_CONTROLLER_FILTER: name = "Filter"; break;

                case MIDI_CONTROLLER_REVERB: name = "Reverb"; break;

                case MIDI_CONTROLLER_CHORUS: name = "Chorus"; break;

                case MIDI_CONTROLLER_NRPN_1: name = "NRPN 1"; break;

                case MIDI_CONTROLLER_NRPN_2: name = "NRPN 2"; break;

                case MIDI_CONTROLLER_RPN_1: name = "RPN 1"; break;

                case MIDI_CONTROLLER_RPN_2: name = "RPN 2"; break;

                case MIDI_CONTROLLER_SOUNDS_OFF: name = "All sounds off"; break;

                case MIDI_CONTROLLER_RESET: name = "Reset"; break;

                case MIDI_CONTROLLER_LOCAL: name = "Local"; break;

                case MIDI_CONTROLLER_ALL_NOTES_OFF: name = "All notes off"; break;

                }

                cout << t << ": Controller change: channel " << ch

                     << " controller " << j->getData1();

                if (name != "") cout << " (" << name << ")";

                cout << " value " << j->getData2() << endl;

            }

                break;

            case MIDI_PROG_CHANGE:

                cout << t << ": Program change: channel " << ch

                     << " program " << j->getData1() << endl;

                break;

            case MIDI_CHNL_AFTERTOUCH:

                cout << t << ": Channel aftertouch: channel " << ch

                     << " pressure " << j->getData1() << endl;

                break;

            case MIDI_PITCH_BEND:

                cout << t << ": Pitch bend: channel " << ch

                     << " value " << (int)j->getData2() * 128 + (int)j->getData1() << endl;

                break;

            case MIDI_SYSTEM_EXCLUSIVE:

                cout << t << ": System exclusive: code "

                     << (int)j->getMessageType() << " message length " <<

                    j->getMetaMessage().length() << endl;

                break;

            }

        }

    }

}