Hallo lmuse team,
Dear Werner Schweer,
I am a follower of lmuse for a long time.
I need for a project of myine a tool to parse midi files.
My understanding of all of the MIDI events is quite far.
But I have problems in understanding the runstate issue.
I used grepmidi.cpp at basis.
The only problem is,
How to handle midi events that don't have the uppermost bit set.
// semms to have anything in common with "runstate".
in grepmidi.cpp: in line 146 and folowing are some commandos I don't find any
match in the documentation.
..................................
if ((me & 0x80) == 0) {
if (runstate == -1)
return -6; //WHAT IS THIS ABOUT 1)
a = me; //WHAT IS THIS ABOUT
2)
me = runstate; //WHAT IS THIS ABOUT 3)
}
}
switch (me & 0xf0) {
case 0x80:
case 0x90:
case 0xa0:
case 0xb0:
case 0xe0:
getc(f);
++cpos;
case 0xc0:
case 0xd0:
if (a == -1) { //WHAT IS HIS ABOUT 4)
a = getc(f);
++cpos;
}
runstate = me; //WHAT IS HIS ABOUT 5)
break;
case 0xf0: // SYSTEM-EVENT
..................
can anybody explain me what the marked issues really are about.
I use the MIDI docs:
"MIDI File Format - The Sonix Spot"
"Standard MIDI - File Format Spec. 1.1"
Yours,
Willy
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