void midiProcessing::generateMidiFile(const char *filePath, int size)
{
srand (time(NULL));
MidiFile outputFile;
outputFile.absoluteTime();
outputFile.addTrack(1);
outputFile.setTicksPerQuarterNote(tpq);
Array<uchar> midiEvent;
midiEvent.setSize(3);
int actionTime = 0;
int tempVectorIndex = 0;
std::vector<note> tempNote;
int tempIndex;
for (int i = 0; i < size; i++)
{
tempNote = midiProcessing::markovList.at(tempVectorIndex);
tempIndex = (rand() % (midiProcessing::markovList.at(tempVectorIndex).size()-1)) + 1;
midiEvent[0] = 0x90;
midiEvent[1] = tempNote.at(tempIndex).getNumber();
midiEvent[2] = tempNote.at(tempIndex).getVelocity();
outputFile.addEvent(1, actionTime, midiEvent);
midiEvent[0] = 0x80;
outputFile.addEvent(1, (tempNote.at(tempIndex).getDuration())+actionTime, midiEvent);
actionTime += tempNote.at(tempIndex).getRest();
for (int j = 0; j < midiProcessing::markovList.size(); j++)
{
if (midiProcessing::markovList.at(j).at(0).getNumber() == tempNote.at(tempIndex).getNumber())
{
tempVectorIndex = j;
break;
}
}
}
outputFile.sortTracks();
outputFile.write(filePath);
}
void convertMidiFile(MidiFile& midifile, Array<Array<double> >& matlab) {
midifile.absoluteTime();
midifile.joinTracks();
Array<double> event(7);
event.allowGrowth(0);
Array<double> ontimes(128);
Array<int> onvelocities(128);
int i;
for (i=0; i<128; i++) {
ontimes[i] = -1.0;
onvelocities[i] = -1;
}
double offtime = 0.0;
int key = 0;
int vel = 0;
int command = 0;
if (verboseQ) {
cout << "-1\ttpq\t" << midifile.getTicksPerQuarterNote() << endl;
}
for (i=0; i<midifile.getNumEvents(0); i++) {
event.setAll(unused);
command = midifile.getEvent(0, i).data[0] & 0xf0;
if (command == 0xf0) {
command = midifile.getEvent(0, i).data[0];
}
if (command == 0x90 && midifile.getEvent(0, i).data[2] != 0) {
// store note-on velocity and time
key = midifile.getEvent(0, i).data[1];
vel = midifile.getEvent(0, i).data[2];
ontimes[key] = getTime(midifile.getEvent(0, i).time, tempo,
midifile.getTicksPerQuarterNote());
onvelocities[key] = vel;
} else if (command == 0x90 || command == 0x80) {
// note off command write to output
key = midifile.getEvent(0, i).data[1];
offtime = getTime(midifile.getEvent(0, i).time, tempo,
midifile.getTicksPerQuarterNote());
legend_opcode[OP_NOTE/1000] = 1;
if (verboseQ) {
cout
<< ontimes[key]
<< "\tnote"
<< "\tdur=" << offtime - ontimes[key]
<< "\tpch=" << key
<< "\tvel=" << onvelocities[key]
<< "\tch=" << (midifile.getEvent(0, i).data[0] & 0x0f)
<< "\ttrack=" << midifile.getEvent(0, i).track
<< endl;
} else {
event[0] = ontimes[key];
event[1] = OP_NOTE;
event[2] = offtime - ontimes[key];
event[3] = key;
event[4] = onvelocities[key];
event[5] = (midifile.getEvent(0, i).data[0] & 0x0f);
event[6] = midifile.getEvent(0, i).track;
}
} else if (command == 0xb0) {
legend_controller[midifile.getEvent(0,i).data[1]] = 1;
legend_opcode[OP_CONTROL/1000] = 1;
if (verboseQ) {
cout << getTime(midifile.getEvent(0,i).time, tempo,
midifile.getTicksPerQuarterNote())
<< "\tcontrol"
<< "\ttype=" << (int)midifile.getEvent(0, i).data[1]
<< "\tval=" << (int)midifile.getEvent(0, i).data[2]
<< "\tch=" << (midifile.getEvent(0, i).data[0] & 0x0f)
<< "\ttrack=" << midifile.getEvent(0, i).track
<< "\n";
} else {
event[0] = getTime(midifile.getEvent(0,i).time, tempo,
midifile.getTicksPerQuarterNote());
event[1] = OP_CONTROL;
event[2] = (int)midifile.getEvent(0,i).data[1];
event[3] = (int)midifile.getEvent(0,i).data[2];
event[5] = (midifile.getEvent(0, i).data[0] & 0x0f);
event[6] = midifile.getEvent(0, i).track;
}
} else if (command == 0xc0) {
legend_instr[midifile.getEvent(0,i).data[1]] = 1;
legend_opcode[OP_INSTR/1000] = 1;
if (verboseQ) {
cout << getTime(midifile.getEvent(0,i).time, tempo,
midifile.getTicksPerQuarterNote())
<< "\tinstr"
<< "\tname=" << GMinstrument[midifile.getEvent(0,i).data[1]]
<< "\tnum=" << (int)midifile.getEvent(0, i).data[1]
<< "\tch=" << (midifile.getEvent(0, i).data[0] & 0x0f)
<< "\ttrack=" << midifile.getEvent(0, i).track
<< "\n";
} else {
event[0] = getTime(midifile.getEvent(0,i).time, tempo,
midifile.getTicksPerQuarterNote());
event[1] = OP_INSTR;
event[2] = (int)midifile.getEvent(0, i).data[1];
event[5] = (midifile.getEvent(0, i).data[0] & 0x0f);
event[6] = midifile.getEvent(0, i).track;
}
} else if (command == 0xff) {
if (verboseQ) {
cout << getTime(midifile.getEvent(0,i).time, tempo,
midifile.getTicksPerQuarterNote())
<< "\t";
} else {
event[0] = getTime(midifile.getEvent(0,i).time, tempo,
midifile.getTicksPerQuarterNote());
}
processMetaEvent(midifile, i, event);
if (verboseQ) {
cout << "\n";
}
}
// check for tempo indication
if (midifile.getEvent(0, i).data[0] == 0xff &&
midifile.getEvent(0, i).data[1] == 0x51) {
setTempo(midifile, i, tempo);
}
if (event[1] != unused) {
matlab.append(event);
}
}
}
void createMidiFile(MidiFile& midifile, HumdrumFile& infile) {
Array<int> millitimes;
Array<double> velocities;
Array<int> keynum;
Array<int> track;
millitimes.setSize(infile.getNumLines());
velocities.setSize(infile.getNumLines());
keynum.setSize(infile.getNumLines());
track.setSize(infile.getNumLines());
millitimes.setSize(0);
velocities.setSize(0);
keynum.setSize(0);
track.setSize(0);
int intval;
double floatval;
double dmax = -100000;
double dmin = +100000;
int i;
for (i=0; i<infile.getNumLines(); i++) {
if (!infile[i].isData()) {
continue;
}
sscanf(infile[i][0], "%lf", &floatval);
intval = int(floatval * 1000.0 + 0.5);
millitimes.append(intval);
sscanf(infile[i][1], "%lf", &floatval);
velocities.append(floatval);
if (floatval < dmin) { dmin = floatval; }
if (floatval > dmax) { dmax = floatval; }
intval = getMIDIKeyNum(infile[i][2]);
keynum.append(intval);
intval = getTrackNumber(infile[i][2]);
track.append(intval);
}
millitimes.allowGrowth(0);
velocities.allowGrowth(0);
keynum.allowGrowth(0);
track.allowGrowth(0);
// normalize the dynamics data into the range from 0 to 1
double diff = dmax - dmin;
for (i=0; i<velocities.getSize(); i++) {
if (diff > 0.0) {
velocities[i] = (velocities[i] - dmin) / diff;
} else {
velocities[i] = 0.5;
}
}
// now ready to write the data to the MIDI file:
midifile.setMillisecondDelta(); // SMPTE 25 frames & 40 subframes
midifile.absoluteTime(); // Time values inserted are absolute
midifile.addTrack(2); // Right and Left hands
Array<uchar> event;
event.setSize(3);
int intdur = int(duration * 1000.0 + 0.5);
int lasttime = 0;
int dyndiff = maxdyn - mindyn;
int vel;
for (i=0; i<millitimes.getSize(); i++) {
if ((keynum[i] <= 10) || (keynum[i] > 127)) {
continue;
}
vel = int(velocities[i] * dyndiff + mindyn + 0.5);
if (vel < 1) { vel = 1; }
if (vel > 127) { vel = 127; }
event[0] = 0x90; // note-on
event[1] = keynum[i];
event[2] = vel;
midifile.addEvent(track[i], millitimes[i], event);
event[2] = 0;
lasttime = millitimes[i] + intdur;
midifile.addEvent(track[i], lasttime, event);
}
// write the end of track marker
event[0] = 0xff;
event[1] = 0x2f;
event[2] = 0;
for (i=0; i<midifile.getTrackCount(); i++) {
if (i>0) {
// have to lengthen the last note in track due to bugs
// in various MIDI playback programs which clip
// the last chord of a file
midifile.getEvent(i, midifile.getNumEvents(i)-1).time += 1500;
}
midifile.addEvent(i, lasttime+2000, event);
}
// add comments from header
for (i=0; i<infile.getNumLines() && i<lasttime; i++) {
if (infile[i].isBibliographic() || infile[i].isGlobalComment()) {
// 0x01 is a text event
midifile.addMetaEvent(0, i, 0x01, infile[i].getLine());
}
}
// sort the ontimes and offtimes so they are in correct time order:
midifile.sortTracks();
}
