📄 load_imf.c
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}
IMF_ProcessCmd(tr[t].eff1,tr[t].dat1);
IMF_ProcessCmd(tr[t].eff2,tr[t].dat2);
UniNewline();
}
return UniDup();
}
BOOL IMF_Load(BOOL curious)
{
#define IMF_SMPINCR 64
int t,u,track=0,oldnumsmp;
IMFCHANNEL channels[32];
INSTRUMENT *d;
SAMPLE *q;
IMFWAVHEADER *wh=NULL,*s=NULL;
ULONG *nextwav=NULL;
UWORD wavcnt=0;
UBYTE id[4];
/* try to read the module header */
_mm_read_string(mh->songname,32,modreader);
mh->ordnum=_mm_read_I_UWORD(modreader);
mh->patnum=_mm_read_I_UWORD(modreader);
mh->insnum=_mm_read_I_UWORD(modreader);
mh->flags =_mm_read_I_UWORD(modreader);
_mm_fseek(modreader,8,SEEK_CUR);
mh->initspeed =_mm_read_UBYTE(modreader);
mh->inittempo =_mm_read_UBYTE(modreader);
mh->mastervol =_mm_read_UBYTE(modreader);
mh->mastermult=_mm_read_UBYTE(modreader);
_mm_fseek(modreader,64,SEEK_SET);
if(_mm_eof(modreader)) {
_mm_errno = MMERR_LOADING_HEADER;
return 0;
}
/* set module variables */
of.songname=DupStr(mh->songname,31,1);
of.modtype=strdup(IMF_Version);
of.numpat=mh->patnum;
of.numins=mh->insnum;
of.reppos=0;
of.initspeed=mh->initspeed;
of.inittempo=mh->inittempo;
of.initvolume=mh->mastervol<<1;
of.flags |= UF_INST | UF_ARPMEM | UF_PANNING;
if(mh->flags&1) of.flags |= UF_LINEAR;
of.bpmlimit=32;
/* read channel information */
of.numchn=0;
memset(remap,-1,32*sizeof(UBYTE));
for(t=0;t<32;t++) {
_mm_read_string(channels[t].name,12,modreader);
channels[t].chorus=_mm_read_UBYTE(modreader);
channels[t].reverb=_mm_read_UBYTE(modreader);
channels[t].pan =_mm_read_UBYTE(modreader);
channels[t].status=_mm_read_UBYTE(modreader);
}
/* bug in Imago Orpheus ? If only channel 1 is enabled, in fact we have to
enable 16 channels */
if(!channels[0].status) {
for(t=1;t<16;t++) if(channels[t].status!=1) break;
if(t==16) for(t=1;t<16;t++) channels[t].status=0;
}
for(t=0;t<32;t++) {
if(channels[t].status!=2)
remap[t]=of.numchn++;
else
remap[t]=-1;
}
for(t=0;t<32;t++)
if(remap[t]!=-1) {
of.panning[remap[t]]=channels[t].pan;
of.chanvol[remap[t]]=channels[t].status?0:64;
}
if(_mm_eof(modreader)) {
_mm_errno = MMERR_LOADING_HEADER;
return 0;
}
/* read order list */
_mm_read_UBYTES(mh->orders,256,modreader);
if(_mm_eof(modreader)) {
_mm_errno = MMERR_LOADING_HEADER;
return 0;
}
of.numpos=0;
for(t=0;t<mh->ordnum;t++)
if(mh->orders[t]!=0xff) of.numpos++;
if(!AllocPositions(of.numpos)) return 0;
for(t=u=0;t<mh->ordnum;t++)
if(mh->orders[t]!=0xff) of.positions[u++]=mh->orders[t];
/* load pattern info */
of.numtrk=of.numpat*of.numchn;
if(!AllocTracks()) return 0;
if(!AllocPatterns()) return 0;
for(t=0;t<of.numpat;t++) {
SLONG size;
UWORD rows;
size=(SLONG)_mm_read_I_UWORD(modreader);
rows=_mm_read_I_UWORD(modreader);
if((rows>256)||(size<4)) {
_mm_errno=MMERR_LOADING_PATTERN;
return 0;
}
of.pattrows[t]=rows;
if(!IMF_ReadPattern(size-4,rows)) return 0;
for(u=0;u<of.numchn;u++)
if(!(of.tracks[track++]=IMF_ConvertTrack(&imfpat[u*256],rows)))
return 0;
}
/* load instruments */
if(!AllocInstruments()) return 0;
d=of.instruments;
for(oldnumsmp=t=0;t<of.numins;t++) {
IMFINSTHEADER ih;
memset(d->samplenumber,0xff,INSTNOTES*sizeof(UWORD));
/* read instrument header */
_mm_read_string(ih.name,32,modreader);
d->insname=DupStr(ih.name,31,1);
_mm_read_UBYTES(ih.what,IMFNOTECNT,modreader);
_mm_fseek(modreader,8,SEEK_CUR);
_mm_read_I_UWORDS(ih.volenv,IMFENVCNT,modreader);
_mm_read_I_UWORDS(ih.panenv,IMFENVCNT,modreader);
_mm_read_I_UWORDS(ih.pitenv,IMFENVCNT,modreader);
#if defined __STDC__ || defined _MSC_VER || defined MPW_C
#define IMF_FinishLoadingEnvelope(name) \
ih. name##pts=_mm_read_UBYTE(modreader); \
ih. name##sus=_mm_read_UBYTE(modreader); \
ih. name##beg=_mm_read_UBYTE(modreader); \
ih. name##end=_mm_read_UBYTE(modreader); \
ih. name##flg=_mm_read_UBYTE(modreader); \
_mm_read_UBYTE(modreader); \
_mm_read_UBYTE(modreader); \
_mm_read_UBYTE(modreader)
#else
#define IMF_FinishLoadingEnvelope(name) \
ih. name/**/pts=_mm_read_UBYTE(modreader); \
ih. name/**/sus=_mm_read_UBYTE(modreader); \
ih. name/**/beg=_mm_read_UBYTE(modreader); \
ih. name/**/end=_mm_read_UBYTE(modreader); \
ih. name/**/flg=_mm_read_UBYTE(modreader); \
_mm_read_UBYTE(modreader); \
_mm_read_UBYTE(modreader); \
_mm_read_UBYTE(modreader)
#endif
IMF_FinishLoadingEnvelope(vol);
IMF_FinishLoadingEnvelope(pan);
IMF_FinishLoadingEnvelope(pit);
ih.volfade=_mm_read_I_UWORD(modreader);
ih.numsmp =_mm_read_I_UWORD(modreader);
_mm_read_UBYTES(id,4,modreader);
/* Looks like Imago Orpheus forgets the signature for empty
instruments following a multi-sample instrument... */
if(memcmp(id,"II10",4) &&
(oldnumsmp && memcmp(id,"\x0\x0\x0\x0",4))) {
if(nextwav) free(nextwav);
if(wh) free(wh);
_mm_errno=MMERR_LOADING_SAMPLEINFO;
return 0;
}
oldnumsmp=ih.numsmp;
if((ih.numsmp>16)||(ih.volpts>IMFENVCNT/2)||(ih.panpts>IMFENVCNT/2)||
(ih.pitpts>IMFENVCNT/2)||(_mm_eof(modreader))) {
if(nextwav) free(nextwav);
if(wh) free(wh);
_mm_errno=MMERR_LOADING_SAMPLEINFO;
return 0;
}
for(u=0;u<IMFNOTECNT;u++)
d->samplenumber[u]=ih.what[u]>ih.numsmp?0xffff:ih.what[u]+of.numsmp;
d->volfade=ih.volfade;
#if defined __STDC__ || defined _MSC_VER || defined MPW_C
#define IMF_ProcessEnvelope(name) \
for (u = 0; u < (IMFENVCNT >> 1); u++) { \
d-> name##env[u].pos = ih. name##env[u << 1]; \
d-> name##env[u].val = ih. name##env[(u << 1)+ 1]; \
} \
if (ih. name##flg&1) d-> name##flg|=EF_ON; \
if (ih. name##flg&2) d-> name##flg|=EF_SUSTAIN; \
if (ih. name##flg&4) d-> name##flg|=EF_LOOP; \
d-> name##susbeg=d-> name##susend=ih. name##sus; \
d-> name##beg=ih. name##beg; \
d-> name##end=ih. name##end; \
d-> name##pts=ih. name##pts; \
\
if ((d-> name##flg&EF_ON)&&(d-> name##pts<2)) \
d-> name##flg&=~EF_ON
#else
#define IMF_ProcessEnvelope(name) \
for (u = 0; u < (IMFENVCNT >> 1); u++) { \
d-> name/**/env[u].pos = ih. name/**/env[u << 1]; \
d-> name/**/env[u].val = ih. name/**/env[(u << 1)+ 1]; \
} \
if (ih. name/**/flg&1) d-> name/**/flg|=EF_ON; \
if (ih. name/**/flg&2) d-> name/**/flg|=EF_SUSTAIN; \
if (ih. name/**/flg&4) d-> name/**/flg|=EF_LOOP; \
d-> name/**/susbeg=d-> name/**/susend=ih. name/**/sus; \
d-> name/**/beg=ih. name/**/beg; \
d-> name/**/end=ih. name/**/end; \
d-> name/**/pts=ih. name/**/pts; \
\
if ((d-> name/**/flg&EF_ON)&&(d-> name/**/pts<2)) \
d-> name/**/flg&=~EF_ON
#endif
IMF_ProcessEnvelope(vol);
IMF_ProcessEnvelope(pan);
IMF_ProcessEnvelope(pit);
#undef IMF_ProcessEnvelope
if(ih.pitflg&1) {
d->pitflg&=~EF_ON;
#ifdef MIKMOD_DEBUG
fprintf(stderr, "\rFilter envelopes not supported yet\n");
#endif
}
/* gather sample information */
for(u=0;u<ih.numsmp;u++,s++) {
/* allocate more room for sample information if necessary */
if(of.numsmp+u==wavcnt) {
wavcnt+=IMF_SMPINCR;
if(!(nextwav=realloc(nextwav,wavcnt*sizeof(ULONG)))) {
if(wh) free(wh);
_mm_errno=MMERR_OUT_OF_MEMORY;
return 0;
}
if(!(wh=realloc(wh,wavcnt*sizeof(IMFWAVHEADER)))) {
free(nextwav);
_mm_errno=MMERR_OUT_OF_MEMORY;
return 0;
}
s=wh+(wavcnt-IMF_SMPINCR);
}
_mm_read_string(s->samplename,13,modreader);
_mm_read_UBYTE(modreader);_mm_read_UBYTE(modreader);_mm_read_UBYTE(modreader);
s->length =_mm_read_I_ULONG(modreader);
s->loopstart =_mm_read_I_ULONG(modreader);
s->loopend =_mm_read_I_ULONG(modreader);
s->samplerate=_mm_read_I_ULONG(modreader);
s->volume =_mm_read_UBYTE(modreader)&0x7f;
s->pan =_mm_read_UBYTE(modreader);
_mm_fseek(modreader,14,SEEK_CUR);
s->flags =_mm_read_UBYTE(modreader);
_mm_fseek(modreader,11,SEEK_CUR);
_mm_read_UBYTES(id,4,modreader);
if(((memcmp(id,"IS10",4))&&(memcmp(id,"IW10",4)))||
(_mm_eof(modreader))) {
free(nextwav);free(wh);
_mm_errno=MMERR_LOADING_SAMPLEINFO;
return 0;
}
nextwav[of.numsmp+u]=_mm_ftell(modreader);
_mm_fseek(modreader,s->length,SEEK_CUR);
}
of.numsmp+=ih.numsmp;
d++;
}
/* sanity check */
if(!of.numsmp) {
if(nextwav) free(nextwav);
if(wh) free(wh);
_mm_errno=MMERR_LOADING_SAMPLEINFO;
return 0;
}
/* load samples */
if(!AllocSamples()) {
free(nextwav);free(wh);
return 0;
}
if(!AllocLinear()) {
free(nextwav);free(wh);
return 0;
}
q=of.samples;
s=wh;
for(u=0;u<of.numsmp;u++,s++,q++) {
q->samplename=DupStr(s->samplename,12,1);
q->length =s->length;
q->loopstart=s->loopstart;
q->loopend =s->loopend;
q->volume =s->volume;
q->speed =s->samplerate;
if(of.flags&UF_LINEAR)
q->speed=speed_to_finetune(s->samplerate<<1,u);
q->panning =s->pan;
q->seekpos =nextwav[u];
q->flags|=SF_SIGNED;
if(s->flags&0x1) q->flags|=SF_LOOP;
if(s->flags&0x2) q->flags|=SF_BIDI;
if(s->flags&0x8) q->flags|=SF_OWNPAN;
if(s->flags&0x4) {
q->flags|=SF_16BITS;
q->length >>=1;
q->loopstart>>=1;
q->loopend >>=1;
}
}
d=of.instruments;
s=wh;
for(u=0;u<of.numins;u++,d++) {
for(t=0;t<IMFNOTECNT;t++) {
if(d->samplenumber[t]>=of.numsmp)
d->samplenote[t]=255;
else if (of.flags&UF_LINEAR) {
int note=(int)d->samplenote[u]+noteindex[d->samplenumber[u]];
d->samplenote[u]=(note<0)?0:(note>255?255:note);
} else
d->samplenote[t]=t;
}
}
free(wh);free(nextwav);
return 1;
}
CHAR *IMF_LoadTitle(void)
{
CHAR s[31];
_mm_fseek(modreader,0,SEEK_SET);
if(!_mm_read_UBYTES(s,31,modreader)) return NULL;
return(DupStr(s,31,1));
}
/*========== Loader information */
MIKMODAPI MLOADER load_imf={
NULL,
"IMF",
"IMF (Imago Orpheus)",
IMF_Init,
IMF_Test,
IMF_Load,
IMF_Cleanup,
IMF_LoadTitle
};
/* ex:set ts=4: */
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