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#ifndef _ITDEFS_H_
#define _ITDEFS_H_
#pragma pack(push, 1)
struct it_file {
uint32_t id; // 0x4D504D49
int8_t songname[26];
uint8_t hilight_minor;
uint8_t hilight_major;
uint16_t ordnum;
uint16_t insnum;
uint16_t smpnum;
uint16_t patnum;
uint16_t cwtv;
uint16_t cmwt;
uint16_t flags;
uint16_t special;
uint8_t globalvol;
uint8_t mv;
uint8_t speed;
uint8_t tempo;
uint8_t sep;
uint8_t pwd;
uint16_t msglength;
uint32_t msgoffset;
uint32_t reserved2;
uint8_t chnpan[64];
uint8_t chnvol[64];
};
struct it_envelope {
uint8_t flags;
uint8_t num;
uint8_t lpb;
uint8_t lpe;
uint8_t slb;
uint8_t sle;
uint8_t data[25*3];
uint8_t reserved;
};
// Old Impulse Instrument Format (cmwt < 0x200)
struct it_instrument_old {
uint32_t id; // IMPI = 0x49504D49
int8_t filename[12]; // DOS file name
uint8_t zero;
uint8_t flags;
uint8_t vls;
uint8_t vle;
uint8_t sls;
uint8_t sle;
uint16_t reserved1;
uint16_t fadeout;
uint8_t nna;
uint8_t dnc;
uint16_t trkvers;
uint8_t nos;
uint8_t reserved2;
int8_t name[26];
uint16_t reserved3[3];
uint8_t keyboard[240];
uint8_t volenv[200];
uint8_t nodes[50];
};
// Impulse Instrument Format
struct it_instrument {
uint32_t id;
int8_t filename[12];
uint8_t zero;
uint8_t nna;
uint8_t dct;
uint8_t dca;
uint16_t fadeout;
signed char pps;
uint8_t ppc;
uint8_t gbv;
uint8_t dfp;
uint8_t rv;
uint8_t rp;
uint16_t trkvers;
uint8_t nos;
uint8_t reserved1;
int8_t name[26];
uint8_t ifc;
uint8_t ifr;
uint8_t mch;
uint8_t mpr;
uint16_t mbank;
uint8_t keyboard[240];
struct it_envelope volenv;
struct it_envelope panenv;
struct it_envelope pitchenv;
uint8_t dummy[4]; // was 7, but IT v2.17 saves 554 bytes
};
// IT Sample Format
struct it_sample {
uint32_t id; // 0x53504D49
int8_t filename[12];
uint8_t zero;
uint8_t gvl;
uint8_t flags;
uint8_t vol;
int8_t name[26];
uint8_t cvt;
uint8_t dfp;
uint32_t length;
uint32_t loopbegin;
uint32_t loopend;
uint32_t C5Speed;
uint32_t susloopbegin;
uint32_t susloopend;
uint32_t samplepointer;
uint8_t vis;
uint8_t vid;
uint8_t vir;
uint8_t vit;
};
#pragma pack(pop)
#endif
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