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#ifndef _ITDEFS_H_
#define _ITDEFS_H_
#pragma pack(1)
typedef struct tagITFILEHEADER
{
DWORD id; // 0x4D504D49
CHAR songname[26];
WORD reserved1; // 0x1004
WORD ordnum;
WORD insnum;
WORD smpnum;
WORD patnum;
WORD cwtv;
WORD cmwt;
WORD flags;
WORD special;
BYTE globalvol;
BYTE mv;
BYTE speed;
BYTE tempo;
BYTE sep;
BYTE zero;
WORD msglength;
DWORD msgoffset;
DWORD reserved2;
BYTE chnpan[64];
BYTE chnvol[64];
} ITFILEHEADER;
typedef struct tagITENVELOPE
{
BYTE flags;
BYTE num;
BYTE lpb;
BYTE lpe;
BYTE slb;
BYTE sle;
BYTE data[25*3];
BYTE reserved;
} ITENVELOPE;
// Old Impulse Instrument Format (cmwt < 0x200)
typedef struct tagITOLDINSTRUMENT
{
DWORD id; // IMPI = 0x49504D49
CHAR filename[12]; // DOS file name
BYTE zero;
BYTE flags;
BYTE vls;
BYTE vle;
BYTE sls;
BYTE sle;
WORD reserved1;
WORD fadeout;
BYTE nna;
BYTE dnc;
WORD trkvers;
BYTE nos;
BYTE reserved2;
CHAR name[26];
WORD reserved3[3];
BYTE keyboard[240];
BYTE volenv[200];
BYTE nodes[50];
} ITOLDINSTRUMENT;
// Impulse Instrument Format
typedef struct tagITINSTRUMENT
{
DWORD id;
CHAR filename[12];
BYTE zero;
BYTE nna;
BYTE dct;
BYTE dca;
WORD fadeout;
signed char pps;
BYTE ppc;
BYTE gbv;
BYTE dfp;
BYTE rv;
BYTE rp;
WORD trkvers;
BYTE nos;
BYTE reserved1;
CHAR name[26];
BYTE ifc;
BYTE ifr;
BYTE mch;
BYTE mpr;
WORD mbank;
BYTE keyboard[240];
ITENVELOPE volenv;
ITENVELOPE panenv;
ITENVELOPE pitchenv;
BYTE dummy[4]; // was 7, but IT v2.17 saves 554 bytes
} ITINSTRUMENT;
// IT Sample Format
typedef struct ITSAMPLESTRUCT
{
DWORD id; // 0x53504D49
CHAR filename[12];
BYTE zero;
BYTE gvl;
BYTE flags;
BYTE vol;
CHAR name[26];
BYTE cvt;
BYTE dfp;
DWORD length;
DWORD loopbegin;
DWORD loopend;
DWORD C5Speed;
DWORD susloopbegin;
DWORD susloopend;
DWORD samplepointer;
BYTE vis;
BYTE vid;
BYTE vir;
BYTE vit;
} ITSAMPLESTRUCT;
#pragma pack()
extern BYTE autovibit2xm[8];
extern BYTE autovibxm2it[8];
#endif
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