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v2mconv.cpp
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v2mconv.cpp
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#include "types.h"
#include "v2mconv.h"
#include "sounddef.h"
#include <string.h>
#include <math.h>
#include <stdio.h>
#define printf2
#pragma intrinsic (pow, sqrt, log)
extern const char * const v2mconv_errors[] =
{
"no error",
"V2M file contains no patch data! (forgot program changes?)",
"V2M file was made with unknown synth version!",
};
// nicht drüber nachdenken.
static struct _ssbase {
const sU8 *patchmap;
const sU8 *globals;
sU32 timediv;
sU32 timediv2;
sU32 maxtime;
const sU8 *gptr;
sU32 gdnum;
struct _basech {
sU32 notenum;
const sU8 *noteptr;
sU32 pcnum;
const sU8 *pcptr;
sU32 pbnum;
const sU8 *pbptr;
struct _bcctl {
sU32 ccnum;
const sU8 *ccptr;
} ctl[7];
} chan[16];
const sU8 *mididata;
sInt midisize;
sInt patchsize;
sInt globsize;
sInt maxp;
const sU8 *newpatchmap;
const sU8 *speechdata;
sInt spsize;
} base;
extern "C" void * memset(void *, int, size_t);
#pragma intrinsic (memset)
static void readfile(const unsigned char *inptr, const int inlen)
{
const sU8 *d=inptr;
memset(&base,0,sizeof(base));
base.timediv=(*((sU32*)(d)));
base.timediv2=10000*base.timediv;
base.maxtime=*((sU32*)(d+4));
base.gdnum=*((sU32*)(d+8));
d+=12;
base.gptr=d;
d+=10*base.gdnum;
for (sInt ch=0; ch<16; ch++)
{
_ssbase::_basech &c=base.chan[ch];
c.notenum=*((sU32*)d);
d+=4;
if (c.notenum)
{
c.noteptr=d;
d+=5*c.notenum;
c.pcnum=*((sU32*)d);
d+=4;
c.pcptr=d;
d+=4*c.pcnum;
c.pbnum=*((sU32*)d);
d+=4;
c.pbptr=d;
d+=5*c.pbnum;
for (sInt cn=0; cn<7; cn++)
{
_ssbase::_basech::_bcctl &cc=c.ctl[cn];
cc.ccnum=*((sU32*)d);
d+=4;
cc.ccptr=d;
d+=4*cc.ccnum;
}
}
}
base.midisize=d-inptr;
base.globsize=*((sU32*)d);
if (base.globsize<0 || base.globsize>131072) return;
d+=4;
base.globals=d;
d+=base.globsize;
base.patchsize=*((sU32*)d);
if (base.patchsize<0 || base.patchsize>1048576) return;
d+=4;
base.patchmap=d;
d+=base.patchsize;
if (d-inptr < inlen)
{
base.spsize=*((sU32*)d);
d+=4;
base.speechdata=d;
d+=base.spsize;
// small sanity check
if (base.spsize<0 || base.spsize > 8192)
{
base.spsize=0;
base.speechdata=0;
}
}
else
{
base.spsize=0;
base.speechdata=0;
}
printf2("after read: est %d, is %d\n",inlen,d-inptr);
printf2("midisize: %d, globs: %d, patches: %d\n",base.midisize,base.globsize,base.patchsize);
}
int patchesused[128];
// gives version deltas
int CheckV2MVersion(const unsigned char *inptr, const int inlen)
{
int i;
readfile(inptr,inlen);
if (!base.patchsize)
return -1;
// determine highest used patch from progchange commands
// (midiconv remaps the patches so that they're a
// continuous block from 0 to x)
memset(patchesused,0,sizeof(patchesused));
base.maxp=0;
for (int ch=0; ch<16; ch++)
{
unsigned char p=0;
unsigned char v=0;
sInt pcp=0;
sInt pct=0;
sInt pcn=base.chan[ch].pcnum;
sInt np=0;
sInt nt=0;
sInt nn=base.chan[ch].notenum;
sInt td;
const sU8 *ptr;
for (sInt pcp=0; pcp<pcn; pcp++)
{
// have there been notes? add last pgm
ptr=base.chan[ch].pcptr;
td=0x10000*ptr[2*pcn+pcp]+0x100*ptr[1*pcn+pcp]+ptr[0*pcn+pcp];
pct+=td;
if (pct>nt)
{
patchesused[p]=1;
if (p>=base.maxp) base.maxp=p+1;
}
p+=ptr[3*pcn+pcp];
// walk notes until we reach current cmd
while (np<nn && nt<=pct)
{
ptr=base.chan[ch].noteptr;
td=0x10000*ptr[2*nn+np]+0x100*ptr[1*nn+np]+ptr[0*nn+np];
v+=ptr[4*nn+np];
nt+=td;
np++;
}
}
if (np<nn)
{
patchesused[p]=1;
if (p>=base.maxp) base.maxp=p+1;
}
}
printf2("patches used: %d\n",base.maxp);
if (!base.maxp)
return -1;
// offset table to ptaches
sInt *poffsets=(sInt *)base.patchmap;
sInt matches=0, best=-1;
// for each version check...
for (i=0; i<=v2version; i++)
{
// ... if globals size is correct...
if (base.globsize==v2gsizes[i])
{
printf2("globsize match: %d\n",i);
// ... and if the size of all patches makes sense
int p;
for (p=0; p<base.maxp-1; p++)
{
sInt d=(poffsets[p+1]-poffsets[p])-(v2vsizes[i]-3*255);
if (d%3) break;
d/=3;
if ( d != base.patchmap[poffsets[p]+v2vsizes[i]-3*255-1])
break;
}
if (p==base.maxp-1)
{
printf2("... ok!\n");
best=i;
matches++;
}
else
printf2("no match!\n");
}
}
// if we've got exactly one match, we're quite sure
sInt ret=(matches>=1)?v2version-best:-2;
printf2("found version delta: %d\n",ret);
return ret;
}
//Klicke den Narren über Dir und das Schauspiel wird beginnen...
static sInt transEnv(sInt enVal)
{
sF32 dv=(sF32)(1.0f-pow(2.0f, -enVal/128.0f*11.0f));
dv=(sF32)sqrt(dv); // square root to correct value
sInt nEnVal=(sInt)(-log(1.0f-dv)/log(2.0f)*128.0f/11.0f);
if (nEnVal<0)
{
printf2("!!clamping enval lower bound!\n");
nEnVal=0;
}
else if (nEnVal>127)
{
printf2("!!clamping enval upper bound!\n");
nEnVal=127;
}
return nEnVal;
}
void ConvertV2M(const unsigned char *inptr, const int inlen, unsigned char **outptr, int *outlen)
{
int i,p;
// check version
sInt vdelta=CheckV2MVersion(inptr,inlen);
if (!vdelta) // if same, simply clone
{
*outptr=new sU8[inlen+4];
memset(*outptr,0,inlen+4);
*outlen=inlen+4;
memcpy(*outptr,inptr,inlen);
return;
}
else if (vdelta<0) // if invalid...
{
*outptr=0;
*outlen=0;
return;
}
vdelta=v2version-vdelta;
// fake base.maxp
int maxp2=((sInt*)base.patchmap)[0]/4;
if (maxp2!=base.maxp)
{
printf2("warning: patch count inconsistency: we:%d, they:%d\n",base.maxp,maxp2);
base.maxp=maxp2;
}
// calc new size
int gdiff=v2gsizes[v2version]-v2gsizes[vdelta];
int pdiff=v2vsizes[v2version]-v2vsizes[vdelta];
int newsize=inlen+gdiff+base.maxp*pdiff;
printf2("old size: %d, new size: %d\n",inlen,newsize);
// init new v2m
*outlen=newsize+4;
sU8 *newptr=*outptr=new sU8[newsize+4];
memset(newptr,0,newsize+4);
// copy midi data
memcpy(newptr,inptr,base.midisize);
// new globals length...
newptr+=base.midisize;
*(sInt *)newptr=v2ngparms;
printf2("glob size: old %d, new %d\n",base.globsize,*(sInt *)newptr);
newptr+=4;
// copy/remap globals
memcpy(newptr,v2initglobs,v2ngparms);
const sU8 *oldgptr=base.globals;
for (i=0; i<v2ngparms; i++)
{
if (v2gparms[i].version<=vdelta)
newptr[i]=*oldgptr++;
}
newptr+=v2ngparms;
// new patch data length
*(sInt *)newptr=base.patchsize+base.maxp*pdiff;
printf2("patch size: old %d, new %d\n",base.patchsize,*(sInt *)newptr);
newptr+=4;
base.newpatchmap=newptr;
sInt *poffsets=(sInt *)base.patchmap;
sInt *noffsets=(sInt *)newptr;
const int ros=v2vsizes[vdelta]-255*3-1;
sU8 *nptr2=newptr;
// copy patch table...
for (p=0; p<base.maxp; p++)
noffsets[p]=poffsets[p]+p*pdiff;
newptr+=4*base.maxp;
// for each patch...
for (p=0; p<base.maxp; p++)
{
const sU8 *src=base.patchmap+poffsets[p];
const sU8 *dest_soll=nptr2+noffsets[p];
printf2("p%d ist:%08x soll:%08x\n",p,newptr,dest_soll);
// fill patch with default values
memcpy(newptr,v2initsnd,v2nparms);
// copy/remap patch data
for (i=0; i<v2nparms; i++)
{
if (v2parms[i].version<=vdelta)
{
*newptr=*src++;
/*
if (vdelta<2 && (i==33 || i==36 || i==39 || i==42)) // fix envelopes
*newptr=transEnv(*newptr);
*/
}
newptr++;
}
// copy mod number
const sInt modnum=*newptr++=*src++;
// printf2("patch %d: %d mods\n",p,modnum);
// copy/remap modulations
for (i=0; i<modnum; i++)
{
newptr[0]=src[0];
newptr[1]=src[1];
newptr[2]=src[2];
for (int k=0; k<=newptr[2]; k++)
if (v2parms[k].version>vdelta) newptr[2]++;
newptr+=3;
src+=3;
}
}
// copy speech
*(sU32*)newptr=base.spsize;
newptr+=4;
memcpy(newptr,base.speechdata,base.spsize);
newptr+=base.spsize;
printf2("est size: %d, real size: %d\n",newsize,newptr-*outptr);
}
unsigned long GetV2MPatchData(const unsigned char *inptr, const int inlen,
unsigned char **outptr, const unsigned char **patchmap)
{
int outlen;
ConvertV2M(inptr,inlen,outptr,&outlen);
const sU8 *pm=base.newpatchmap;
if (!pm) pm=base.patchmap;
sInt *poffsets=(sInt*)pm;
for (sInt i=0; i<base.maxp; i++)
{
patchmap[i]=pm+poffsets[i];
}
return base.maxp;
}