Descent3/music/musiclib.h

#define OMFCMD_NUM 22

#define OMFCMD_STREAM 0     // associates a symbol with a stream filename
#define OMFCMD_SECTION 1    // begins a theme
#define OMFCMD_PLAY 2       // plays a sample specified through llpt and lplc
#define OMFCMD_ENDSECTION 3 // ends a theme
#define OMFCMD_LABEL 4      // defines a label for branching
#define OMFCMD_COMPARE 5    // compares a register rX to what's loaded via lcmp
#define OMFCMD_LCMP 6       // loads NUMBER into lcmp
#define OMFCMD_LLPT 7       // specifies next play will load the sample specified
#define OMFCMD_LPLC 8       // specifies next play will loop sample n times
#define OMFCMD_INCI 9       // increments 'I' counter
#define OMFCMD_SETI 10      // sets 'I' counter
#define OMFCMD_IFI 11       // if 'I' counter == n then inst1;inst2;...;inst n
#define OMFCMD_REGION 12    // specifies a start of a named region
#define OMFCMD_ENDREGION 13 // specifies the end of a named region

#define OMFCMD_BRANCHING 15
#define OMFCMD_BLT 15  // branch if rX < lcmp
#define OMFCMD_BGT 16  // branch if rX > lcmp
#define OMFCMD_BEQ 17  // branch if rX == lcmp
#define OMFCMD_BNIF 18 // branch if stream playing is NOT finished.
#define OMFCMD_GOTO 19 // unconditional goto a label
#define OMFCMD_WAIT 20 // tells the system to wait

// undocumented codes.
#define OMFCMD_MPLAY 200  // internal code.
#define OMFCMD_ENDIFI 201 // end of ifi conditional.