zdoom-macos-deps/deps/modplug/include/libmodplug/it_defs.h

#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