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Copy pathmdx2midi.cpp
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239 lines (227 loc) · 7.3 KB
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#include "MDX.h"
#include "Stream.h"
#include "FS.h"
#include "Midi.h"
#include <exception>
class MDXMidiChannelParser: public MDXMemParser {
public:
MidiWriteTrack mid;
MDXHeader *header;
uint32_t deltaTime, restTime;
uint8_t lastCmd;
uint8_t volume, pan;
uint8_t firstTempo;
uint32_t totalTicks;
uint8_t kTicks, qTicks;
bool nextKeyOff;
int nextPortamento;
int lastNote;
bool isFirstNote;
int detune;
MDXMidiChannelParser(): volume(127), pan(3), firstTempo(0), totalTicks(0), kTicks(0), qTicks(8), nextKeyOff(false), nextPortamento(0), lastNote(-1), isFirstNote(true), detune(0) {}
virtual void handleNote(uint8_t n, uint8_t duration) {
int add = channel >= 8 ? 36 : 3;
uint8_t d;
if(qTicks <= 8) d = duration * qTicks / 8;
else d = MIN(duration, 255 - qTicks);
if(kTicks < d) {
if(nextPortamento) {
int nextNote = n + (nextPortamento * duration + (nextPortamento < 0 ? -16383 : 16383)) / 16384;
if(lastNote >= 0) {
mid.writeNoteOn(restTime, channel, lastNote + add, 0);
}
mid.writeControlChange(0, channel, 5, MIN(duration - kTicks, 127)); // Portamento time
mid.writeNoteOn(kTicks, channel, n + add, volume);
mid.writeNoteOn(1, channel, nextNote + add, volume);
mid.writeNoteOn(d - kTicks - 1, channel, n + add, 0);
mid.writeNoteOn(0, channel, nextNote + add, 0);
nextPortamento = 0;
} else if(nextKeyOff) {
mid.writeControlChange(0, channel, 5, 0); // Portamento time
if(lastNote >= 0) {
if(lastNote != n) {
mid.writeNoteOn(restTime + kTicks, channel, n + add, volume);
mid.writeNoteOn(d - kTicks, channel, lastNote + add, 0);
restTime = 0;
} else restTime += duration;
} else {
mid.writeNoteOn(restTime + kTicks, channel, n + add, volume);
restTime = duration;
}
lastNote = n;
} else {
if(lastNote >= 0) {
if(lastNote != n) {
mid.writeNoteOn(restTime + kTicks, channel, n + add, volume);
mid.writeNoteOn(d - kTicks, channel, n + add, 0);
mid.writeNoteOn(0, channel, lastNote + add, 0);
} else {
mid.writeNoteOn(restTime + d, channel, n + add, 0);
}
} else {
mid.writeNoteOn(restTime + kTicks, channel, n + add, volume);
int fTicks = 0;
if(isFirstNote) {
//fTicks = d - kTicks - 1;
// VOPM specific sends
// mid.writeControlChange(fTicks, channel, 126, 127); // Monophonic mode
// mid.writeRPN(0, channel, 0, 32); // Pitch Bend Sensitivity
// mid.writeNRPN(0, channel, 0, 112); // OPM Clock = 4MHz
// mid.writeControlChange(0, channel, 12, 0); // Amplitude LFO level
// mid.writeControlChange(0, channel, 13, 0); // Pitch LFO level
isFirstNote = false;
}
mid.writeNoteOn(d - kTicks - fTicks, channel, n + add, 0);
}
restTime = duration - d;
lastNote = -1;
}
} else {
restTime += duration;
}
totalTicks += duration;
nextPortamento = 0;
nextKeyOff = false;
}
virtual void handleRest(uint8_t duration) {
restTime += duration;
totalTicks += duration;
}
virtual void handlePortamento(int16_t p) {
nextPortamento = p;
}
virtual void handleDisableKeyOff() {
nextKeyOff = true;
}
virtual void handleDataEnd() {
}
virtual void handleSetVoiceNum(uint8_t voice) {
mid.writeProgramChange(restTime, channel, header->voices[voice] ? header->voices[voice]->number : voice);
restTime = 0;
}
static uint32_t calcTempo(uint32_t tempo) {
uint32_t mdxTempo = 1250000 / (256*(256-tempo));
return 60000000 / mdxTempo;
}
virtual void handleSetTempo(uint8_t tempo) {
mid.writeTempo(restTime, calcTempo(tempo));
restTime = 0;
if(firstTempo == 0) firstTempo = tempo;
}
virtual void handleDetune(int16_t det) {
mid.writeRPN(restTime, channel, 0, 32); // Pitch Bend Sensitivity
mid.writePitchBend(0, channel, 0x2000 + det * 4);
detune = det;
restTime = 0;
}
virtual void handleSetVolume(uint8_t vol) {
volume = volumeVal(vol) & 0x7f;
mid.writeControlChange(restTime, channel, 7, pan ? volumeVal(vol) & 0x7f : 0);
restTime = 0;
}
virtual void handlePan(uint8_t p) {
pan = p;
if(pan == 0) {
mid.writeControlChange(restTime, channel, 7, 0);
restTime = 0;
}
uint8_t pans[] = { 64, 127, 0, 64 };
mid.writeControlChange(restTime, channel, 10, pans[pan & 0x03]);
restTime = 0;
}
virtual void handleSoundLength(uint8_t q) {
qTicks = q;
}
virtual void handleKeyOnDelay(uint8_t k) {
kTicks = k;
}
virtual void handleVolumeInc() {
int v = (volume * 16 + 15) / 127;
volume = (v + 1) * 127 / 15;
}
virtual void handleVolumeDec() {
int v = (volume * 16 + 15) / 127;
volume = (v - 1) * 127 / 15;
}
virtual void handleLFOPitch(uint8_t b, uint16_t period, uint16_t change) {}
virtual void handleLFOPitchMPON() {}
virtual void handleLFOPitchMPOF() {}
virtual void handleLFOVolume(uint8_t b, uint16_t period, uint16_t change) {}
virtual void handleLFOVolumeMAON() {}
virtual void handleLFOVolumeMAOF() {}
virtual void handleLFODelaySetting(uint8_t d) {}
};
class MDXMidi {
MDXMidiChannelParser parsers[16];
public:
void open(const char *filename, const char *outfilename) {
FileReadStream s(filename);
MDXHeader h;
h.reorderVoices = true;
h.read(s);
int loopCount = 1;
int midiTracks = 1;
int firstTempo = 0;
uint32_t totalTicks = 0;
for(int i = 0; i < h.numChannels; i++) {
parsers[i].channel = i;
parsers[i].header = &h;
parsers[i].loopIterations = loopCount;
parsers[i].dataLen = h.channels[i].length;
parsers[i].deltaTime = 0;
parsers[i].restTime = 0;
parsers[i].lastCmd = 0;
if(parsers[i].dataLen > 0) {
parsers[i].data = new uint8_t[parsers[i].dataLen];
s.seek(h.fileBase + h.channels[i].offset);
s.read(parsers[i].data, parsers[i].dataLen);
while(!parsers[i].ended) parsers[i].feed();
if(parsers[i].mid.len > 0) {
midiTracks++;
if(parsers[i].firstTempo > 0 && firstTempo == 0)
firstTempo = parsers[i].firstTempo;
if(parsers[i].totalTicks > totalTicks) totalTicks = parsers[i].totalTicks;
}
}
}
MidiWriteStream o(outfilename);
o.writeHeader(midiTracks, 48);
MidiWriteTrack firstTrack;
firstTrack.writeTempo(0, MDXMidiChannelParser::calcTempo(firstTempo ? firstTempo : 200));
firstTrack.writeTimeSignature(0, 4, 2);
char buf[256];
snprintf(buf, sizeof(buf), "Converted from %s", filename);
firstTrack.writeText(0, buf);
firstTrack.writeTrackEnd(totalTicks);
o.writeTrack(firstTrack);
for(int i = 0; i < h.numChannels; i++) {
if(parsers[i].mid.len == 0) continue;
MidiWriteTrack track;
char buf[256];
snprintf(buf, sizeof(buf), "Channel %c (%s)", MDXParser::channelName(i), i < 8 ? "FM" : "ADPCM");
track.writeTrackName(0, buf);
track.writeBankSelect(0, i, 0);
track.writeControlChange(0, i, 126, 127); // Monophonic mode
track.writeRPN(0, i, 0, 32); // Pitch Bend Sensitivity
track.writeNRPN(0, i, 0, 112); // OPM Clock = 4MHz
track.writeControlChange(0, i, 12, 0); // Amplitude LFO level
track.writeControlChange(0, i, 13, 0); // Pitch LFO level
track.writeRPN(0, i, 0, 32); // Pitch Bend Sensitivity
track.writePitchBend(0, i, 0x2000);
track.write(parsers[i].mid);
track.writeTrackEnd(0);
o.writeTrack(track);
}
}
};
int main(int argc, char **argv) {
for(int i = 1; i < argc; i++) {
try {
MDXMidi m;
m.open(argv[i], replaceExtension(argv[i], "mid"));
} catch(exceptionf e) {
fprintf(stderr, "Error: %s\n", e.what());
}
}
return 0;
}