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#include "main.h"
#include "cvt.h"
#define _MThd 'dhTM'
#define _MTrk 'krTM'
#define tempo 0x188000
#define Q_MAX 128
struct HMI_cvt
{
public:
struct
{
DWORD tm;
BYTE ch,n;
} q_rel[Q_MAX];
void inline q_add(BYTE ch,BYTE nt,DWORD t)
{
UINT n=0;
while(q_rel[n].tm!=-1) n++;
q_rel[n].tm=t;
q_rel[n].ch=ch;
q_rel[n].n=nt;
}
grow_buf buf;
UINT DoTrack(const BYTE* t,UINT *_bw);
void DoQueue(DWORD ct,DWORD& tw,BYTE& _run);
bool run(MIDI_file * mf,const BYTE* _buf,DWORD sz);
};
#define FixHeader(H) {(H).fmt=rev16((H).fmt);(H).trax=rev16((H).trax);(H).dtx=rev16((H).dtx);}
void HMI_cvt::DoQueue(DWORD ct,DWORD& tw,BYTE& _run)
{
UINT n,mt,_n;
_t:
mt=-1;
for(n=0;n<Q_MAX;n++)
{
if (q_rel[n].tm<mt) {_n=n;mt=q_rel[n].tm;}
}
if (mt>ct) return;
gb_write_delta(buf,mt-tw);
tw=mt;
BYTE _e=q_rel[_n].ch|0x90;
if (_e!=_run) buf.write_byte(_run=_e);
buf.write_byte(q_rel[_n].n);
buf.write_byte(0);
q_rel[_n].tm=-1;
goto _t;
}
extern BYTE ff7loopstart[12];
UINT HMI_cvt::DoTrack(const BYTE* t,UINT *_bw)
{
{
UINT n;
for(n=0;n<Q_MAX;n++) q_rel[n].tm=-1;
}
DWORD pt=0;
DWORD ct=0,tw=0;
BYTE run=0;
BYTE _run=0;
DWORD bw_s=buf.get_size();
while(1)
{
{
unsigned int _d;
pt+=DecodeDelta(t+pt,&_d);
ct+=_d;
}
DoQueue(ct,tw,_run);
BYTE c=t[pt];
if (c==0xFF)
{
DoQueue(-2,tw,_run);
if (t[pt+1]==0x2f)
{
pt+=3;
buf.write_dword(0x002FFF00);
break;
}
return -1;
}
else if (c==0xF0)
{
gb_write_delta(buf,ct-tw);
tw=ct;
UINT _p=pt;
while(t[pt]!=0xF7) pt++;
pt++;
buf.write(t+_p,pt-_p);
}
else if (c==0xFE)
{
c=t[pt+1];
if (c==0x10)
{
pt+=t[pt+4]+9;
}
else if (c==0x14)
{
pt+=4;
gb_write_delta(buf,ct-tw);
tw=ct;
buf.write(ff7loopstart,12);
}
else if (c==0x15) pt+=8;
else return -1;
}
else
{
gb_write_delta(buf,ct-tw);
tw=ct;
if (c&0x80) {pt++;run=c;}
else c=run;
if (c!=_run) buf.write_byte(_run=c);
buf.write_byte(t[pt++]);
BYTE c1=c&0xF0;
if (c1!=0xC0 && c1!=0xD0) buf.write_byte(t[pt++]);
if (c1==0x90)
{
BYTE b=t[pt-2];
unsigned int _t;
pt+=DecodeDelta(t+pt,&_t);
q_add(c&0xF,b,_t+ct);
}
}
}
(*_bw)+=buf.get_size()-bw_s;
return pt;
}
extern BYTE hmp_track0[19]; //hmp.cpp
bool HMI_cvt::run(MIDI_file* mf,const BYTE* _buf,DWORD sz)
{
const BYTE *ptr=_buf;
while(*(DWORD*)ptr!='CART')
{
ptr++;
if (ptr==_buf+sz) {return 0;}
}
buf.write(0,14);
ptr-=8;
UINT ntrax=1;
UINT nft=*(DWORD*)(_buf+0xE4);
buf.write(hmp_track0,sizeof(hmp_track0));
UINT n;
for(n=0;n<nft;n++)
{
if (ptr>_buf+sz) return 0;
UINT _b=0;
ntrax++;
buf.write_dword(_rv('MTrk'));
DWORD _s=buf.get_size();
buf.write(0,4);
{
const BYTE* p1=ptr+ptr[0x4B];
const BYTE* _p=p1+p1[1];
p1+=2;
while(_p[-1]==' ') _p--;
_b=(_p-p1)+4;
BYTE tmp[3]={0,0xFF,1};
buf.write(tmp,3);
gb_write_delta(buf,_p-p1);
buf.write(p1,_p-p1);
p1=_p;
}
ptr+=ptr[0x57];
{
DWORD d=DoTrack(ptr,&_b);
if (d==-1) return 0;
ptr+=d;
}
buf.write_dword_ptr(rev32(_b),_s);
}
buf.write_dword_ptr(_rv('MThd'),0);
buf.write_dword_ptr(_rv(6),4);
MIDIHEADER mhd={0x0100,rev16(ntrax),0xC000};
buf.write_ptr(&mhd,sizeof(mhd),8);
mf->size = buf.get_size();
mf->data = (BYTE*)buf.finish();
return !!mf->data;
}
bool load_hmi(MIDI_file* mf,const BYTE* _buf,size_t sz)
{
HMI_cvt c;
return c.run(mf,_buf,sz);
}
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