I'm currently developing an app that needs to create a MusicSequence based on user input, and I'm currently getting a -1 error on MusicSequenceFileCreate(). And -1 isn't listed as an error in the MusicSequence reference - am I using the wrong format to print OSStatus?
Any help is greatly appreciated! I haven't been able to find much reference online for saving a MusicSequence to a .mid file...
I get the error at the very end.
OSStatus status = 0;
MusicSequence newSeq;
status = NewMusicSequence(&newSeq);
if(status){
printf("Error new sequence: %ld\n", status);
status = 0;
} else {
MusicSequenceSetSequenceType(newSeq, kMusicSequenceType_Seconds);
}
MusicTrack tempoTrack;
status = MusicSequenceGetTempoTrack(newSeq, &tempoTrack);
if(status){
printf("Error getting tempo track: %ld\n", status);
status = 0;
}
status = MusicTrackNewExtendedTempoEvent(tempoTrack, 0, 120);
if(status){
printf("Error adding tempo to track: %ld\n", status);
status = 0;
}
MusicTrack thisTrack;
status = MusicSequenceNewTrack(newSeq, &thisTrack);
if(status){
printf("Error adding main track: %ld\n", status);
status = 0;
}
for(int i = 0; i<convertThis.melodyPoints.count; i++) {
MIDINoteMessage thisMessage;
thisMessage.note = thisNote.midiNoteNumber;
thisMessage.duration = thisNote.duration;
thisMessage.velocity = 120;
thisMessage.releaseVelocity = 0;
thisMessage.channel = 1;
status = MusicTrackNewMIDINoteEvent(thisTrack, thisNoteBegin, &thisMessage);
if(status){
printf("Error adding midi note: %ld\n", status);
status = 0;
}
}
NSURL *thisurl = [NSURL URLWithString:[@"~/Documents" stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.mid", convertThis.title]]];
status = MusicSequenceFileCreate(newSeq, (__bridge CFURLRef) thisurl, kMusicSequenceFile_MIDIType, kMusicSequenceFileFlags_EraseFile, 0);
if(status != noErr){
printf("Error on create: %ld\n", status);
status = 0;
}