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- /* MikMod sound library
- (c) 1998 Miodrag Vallat and others - see file AUTHORS for complete list
-
- This library is free software; you can redistribute it and/or modify
- it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of
- the License, or (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- /*==============================================================================
-
- $Id: load_it.c,v 1.25 1998/12/07 06:00:14 miod Exp $
-
- Impulse tracker (IT) module loader
-
- ==============================================================================*/
-
- #ifdef HAVE_CONFIG_H
- #include "config.h"
- #endif
-
- #include <ctype.h>
- #include <string.h>
-
- #include <mikmod_internals.h>
-
- /*========== Module structure */
-
- /* header */
- typedef struct ITHEADER {
- CHAR songname[26];
- UBYTE blank01[2];
- UWORD ordnum;
- UWORD insnum;
- UWORD smpnum;
- UWORD patnum;
- UWORD cwt; /* Created with tracker (y.xx = 0x0yxx) */
- UWORD cmwt; /* Compatible with tracker ver > than val. */
- UWORD flags;
- UWORD special; /* bit 0 set = song message attached */
- UBYTE globvol;
- UBYTE mixvol; /* mixing volume [ignored] */
- UBYTE initspeed;
- UBYTE inittempo;
- UBYTE pansep; /* panning separation between channels */
- UBYTE zerobyte;
- UWORD msglength;
- ULONG msgoffset;
- UBYTE blank02[4];
- UBYTE pantable[64];
- UBYTE voltable[64];
- } ITHEADER;
-
- /* sample information */
- typedef struct ITSAMPLE {
- CHAR filename[12];
- UBYTE zerobyte;
- UBYTE globvol;
- UBYTE flag;
- UBYTE volume;
- UBYTE panning;
- CHAR sampname[28];
- UWORD convert; /* sample conversion flag */
- ULONG length;
- ULONG loopbeg;
- ULONG loopend;
- ULONG c5spd;
- ULONG susbegin;
- ULONG susend;
- ULONG sampoffset;
- UBYTE vibspeed;
- UBYTE vibdepth;
- UBYTE vibrate;
- UBYTE vibwave; /* 0=sine, 1=rampdown, 2=square, 3=random (speed ignored) */
- UBYTE noteindex; /* for converting c5spd to finetune */
- } ITSAMPLE;
-
- /* instrument information */
-
- #define ITENVCNT 25
- #define ITNOTECNT 120
- typedef struct ITINSTHEADER {
- ULONG size; /* (dword) Instrument size */
- CHAR filename[12]; /* (char) Instrument filename */
- UBYTE zerobyte; /* (byte) Instrument type (always 0) */
- UBYTE volflg;
- UBYTE volpts;
- UBYTE volbeg; /* (byte) Volume loop start (node) */
- UBYTE volend; /* (byte) Volume loop end (node) */
- UBYTE volsusbeg; /* (byte) Volume sustain begin (node) */
- UBYTE volsusend; /* (byte) Volume Sustain end (node) */
- UBYTE panflg;
- UBYTE panpts;
- UBYTE panbeg; /* (byte) channel loop start (node) */
- UBYTE panend; /* (byte) channel loop end (node) */
- UBYTE pansusbeg; /* (byte) cahnnel sustain begin (node) */
- UBYTE pansusend; /* (byte) channel Sustain end (node) */
- UBYTE pitflg;
- UBYTE pitpts;
- UBYTE pitbeg; /* (byte) pitch loop start (node) */
- UBYTE pitend; /* (byte) pitch loop end (node) */
- UBYTE pitsusbeg; /* (byte) pitch sustain begin (node) */
- UBYTE pitsusend; /* (byte) pitch Sustain end (node) */
- UWORD blank;
- UBYTE globvol;
- UBYTE chanpan;
- UWORD fadeout; /* Envelope end / NNA volume fadeout */
- UBYTE dnc; /* Duplicate note check */
- UBYTE dca; /* Duplicate check action */
- UBYTE dct; /* Duplicate check type */
- UBYTE nna; /* New Note Action [0,1,2,3] */
- UWORD trkvers; /* tracker version used to save [files only] */
- UBYTE ppsep; /* Pitch-pan Separation */
- UBYTE ppcenter; /* Pitch-pan Center */
- UBYTE rvolvar; /* random volume varations */
- UBYTE rpanvar; /* random panning varations */
- UWORD numsmp; /* Number of samples in instrument [files only] */
- CHAR name[26]; /* Instrument name */
- UBYTE blank01[6];
- UWORD samptable[ITNOTECNT];/* sample for each note [note / samp pairs] */
- UBYTE volenv[200]; /* volume envelope (IT 1.x stuff) */
- UBYTE oldvoltick[ITENVCNT];/* volume tick position (IT 1.x stuff) */
- UBYTE volnode[ITENVCNT]; /* aplitude of volume nodes */
- UWORD voltick[ITENVCNT]; /* tick value of volume nodes */
- SBYTE pannode[ITENVCNT]; /* panenv - node points */
- UWORD pantick[ITENVCNT]; /* tick value of panning nodes */
- SBYTE pitnode[ITENVCNT]; /* pitchenv - node points */
- UWORD pittick[ITENVCNT]; /* tick value of pitch nodes */
- } ITINSTHEADER;
-
- /* unpacked note */
-
- typedef struct ITNOTE {
- UBYTE note,ins,volpan,cmd,inf;
- } ITNOTE;
-
- /*========== Loader data */
-
- static ULONG *paraptr=NULL; /* parapointer array (see IT docs) */
- static ITHEADER *mh=NULL;
- static ITNOTE *itpat=NULL; /* allocate to space for one full pattern */
- static UBYTE *mask=NULL; /* arrays allocated to 64 elements and used for */
- static ITNOTE *last=NULL; /* uncompressing IT's pattern information */
- static int numtrk=0;
- static int old_effect; /* if set, use S3M old-effects stuffs */
- static int *noteindex;
-
- CHAR* IT_Version[4]={
- "ImpulseTracker . ",
- "Compressed ImpulseTracker . ",
- "ImpulseTracker 2.14p3",
- "Compressed ImpulseTracker 2.14p3",
- };
-
- /* table for porta-to-note command within volume/panning column */
- static UBYTE portatable[10]= {0,1,4,8,16,32,64,96,128,255};
-
- /*========== Loader code */
-
- UBYTE* IT_ConvertTrack(ITNOTE* tr,UWORD numrows);
-
- BOOL IT_Test(void)
- {
- UBYTE id[4];
-
- if(!_mm_read_UBYTES(id,4,modfp)) return 0;
- if(!memcmp(id,"IMPM",4)) return 1;
- return 0;
- }
-
- BOOL IT_Init(void)
- {
- if(!(mh=(ITHEADER*)_mm_malloc(sizeof(ITHEADER)))) return 0;
- if(!(poslookup=(UBYTE*)_mm_malloc(256*sizeof(UBYTE)))) return 0;
- if(!(itpat=(ITNOTE*)_mm_malloc(256*64*sizeof(ITNOTE)))) return 0;
- if(!(mask=(UBYTE*)_mm_malloc(64*sizeof(UBYTE)))) return 0;
- if(!(last=(ITNOTE*)_mm_malloc(64*sizeof(ITNOTE)))) return 0;
-
- return 1;
- }
-
- void IT_Cleanup(void)
- {
- if(mh) free(mh);
- if(poslookup) free(poslookup);
- if(itpat) free(itpat);
- if(mask) free(mask);
- if(last) free(last);
- if(paraptr) free(paraptr);
- if(noteindex) free(noteindex);
-
- mh = NULL;
- poslookup = NULL;
- itpat = NULL;
- mask = NULL;
- last = NULL;
- paraptr = NULL;
- noteindex = NULL;
- }
-
- /* Because so many IT files have 64 channels as the set number used, but really
- only use far less (usually 8 to 12 still), I had to make this function,
- which determines the number of channels that are actually USED by a pattern.
-
- NOTE: You must first seek to the file location of the pattern before calling
- this procedure.
-
- Returns 1 on error
- */
- BOOL IT_GetNumChannels(UWORD patrows)
- {
- int row=0,flag,ch;
-
- do {
- if((flag=_mm_read_UBYTE(modfp))==EOF) {
- _mm_errno = MMERR_LOADING_PATTERN;
- return 1;
- }
- if(!flag)
- row++;
- else {
- ch=(flag-1)&63;
- remap[ch]=0;
- if(flag & 128) mask[ch]=_mm_read_UBYTE(modfp);
- if(mask[ch]&1) _mm_read_UBYTE(modfp);
- if(mask[ch]&2) _mm_read_UBYTE(modfp);
- if(mask[ch]&4) _mm_read_UBYTE(modfp);
- if(mask[ch]&8) { _mm_read_UBYTE(modfp);_mm_read_UBYTE(modfp); }
- }
- } while(row<patrows);
-
- return 0;
- }
-
- BOOL IT_ReadPattern(UWORD patrows)
- {
- int row=0,flag,ch,blah;
- ITNOTE *itt=itpat,dummy,*n,*l;
-
- memset(itt,255,patrows*of.numchn*sizeof(ITNOTE));
-
- do {
- if((flag=_mm_read_UBYTE(modfp))==EOF) {
- _mm_errno = MMERR_LOADING_PATTERN;
- return 0;
- }
- if(!flag) {
- itt=&itt[of.numchn];
- row++;
- } else {
- ch=remap[(flag-1)&63];
- if(ch!=-1) {
- n=&itt[ch];
- l=&last[ch];
- } else
- n=l=&dummy;
-
- if(flag&128) mask[ch]=_mm_read_UBYTE(modfp);
- if(mask[ch]&1)
- /* convert IT note off to internal note off */
- if((l->note=n->note=_mm_read_UBYTE(modfp))==255)
- l->note=n->note=253;
- if(mask[ch]&2)
- l->ins=n->ins=_mm_read_UBYTE(modfp);
- if(mask[ch]&4)
- l->volpan=n->volpan=_mm_read_UBYTE(modfp);
- if(mask[ch]&8) {
- l->cmd=n->cmd=_mm_read_UBYTE(modfp);
- l->inf=n->inf=_mm_read_UBYTE(modfp);
- }
- if(mask[ch]&16)
- n->note=l->note;
- if(mask[ch]&32)
- n->ins=l->ins;
- if(mask[ch]&64)
- n->volpan=l->volpan;
- if(mask[ch]&128) {
- n->cmd=l->cmd;
- n->inf=l->inf;
- }
- }
- } while(row<patrows);
-
- for(blah=0;blah<of.numchn;blah++) {
- if(!(of.tracks[numtrk++]=IT_ConvertTrack(&itpat[blah],patrows)))
- return 0;
- }
-
- return 1;
- }
-
- UBYTE* IT_ConvertTrack(ITNOTE* tr,UWORD numrows)
- {
- int t;
- UBYTE note,ins,volpan;
-
- UniReset();
-
- for(t=0;t<numrows;t++) {
- note=tr[t*of.numchn].note;
- ins=tr[t*of.numchn].ins;
- volpan=tr[t*of.numchn].volpan;
-
- if(note!=255) {
- if(note==253)
- UniWrite(UNI_KEYOFF);
- else if(note==254)
- UniPTEffect(0xc,-1); /* note cut command */
- else
- UniNote(note);
- }
-
- if((ins)&&(ins<100))
- UniInstrument(ins-1);
- else if(ins==253)
- UniWrite(UNI_KEYOFF);
- else if(ins!=255) { /* crap */
- _mm_errno=MMERR_LOADING_PATTERN;
- return NULL;
- }
-
- /* process volume / panning column
- volume / panning effects do NOT all share the same memory address
- yet. */
- if(volpan<=64)
- UniVolEffect(VOL_VOLUME,volpan);
- else if(volpan<=74) /* fine volume slide up (65-74) */
- UniVolEffect(VOL_VOLSLIDE,0x0f+((volpan-65)<<4));
- else if(volpan<=84) /* fine volume slide down (75-84) */
- UniVolEffect(VOL_VOLSLIDE,0xf0+(volpan-75));
- else if(volpan<=94) /* volume slide up (85-94) */
- UniVolEffect(VOL_VOLSLIDE,((volpan-85)<<4));
- else if(volpan<=104)/* volume slide down (95-104) */
- UniVolEffect(VOL_VOLSLIDE,(volpan-95));
- else if(volpan<=114)/* pitch slide down (105-114) */
- UniVolEffect(VOL_PITCHSLIDEDN,((volpan-105)<<4));
- else if(volpan<=124)/* pitch slide up (115-124) */
- UniVolEffect(VOL_PITCHSLIDEUP,(volpan-115));
- else if(volpan<=127) { /* crap */
- _mm_errno=MMERR_LOADING_PATTERN;
- return NULL;
- } else if(volpan<=192)
- UniVolEffect(VOL_PANNING,((volpan-128)==64)?255:((volpan-128)<<2));
- else if(volpan<=202)/* portamento to note */
- UniVolEffect(VOL_PORTAMENTO,portatable[volpan-193]);
- else if(volpan<=212)/* vibrato */
- UniVolEffect(VOL_VIBRATO,(volpan-203));
- else if(volpan!=255) { /* crap */
- _mm_errno=MMERR_LOADING_PATTERN;
- return NULL;
- }
-
- S3MIT_ProcessCmd(tr[t*of.numchn].cmd,tr[t*of.numchn].inf,old_effect);
-
- UniNewline();
- }
- return UniDup();
- }
-
- void LoadMidiString(FILE* modfp,CHAR* dest)
- {
- CHAR *cur,*last;
-
- _mm_read_UBYTES(dest,32,modfp);
- cur=last=dest;
- /* remove blanks and uppercase all */
- while(*last) {
- if(isalnum(*last)) *(cur++)=toupper(*last);
- last++;
- }
- *cur=0;
- }
-
- /* Load midi information for resonant filters */
- void IT_LoadMidiConfiguration(FILE* modfp)
- {
- int i;
-
- memset(filtermacros,0,sizeof(filtermacros));
- memset(filtersettings,0,sizeof(filtersettings));
-
- if (modfp) { /* information is embedded in file */
- UWORD dat;
- CHAR midiline[33];
-
- dat=_mm_read_I_UWORD(modfp);
- _mm_fseek(modfp,8*dat+0x120,SEEK_CUR);
-
- /* read midi macros */
- for(i=0;i<16;i++) {
- LoadMidiString(modfp,midiline);
- if((!strncmp(midiline,"F0F00",5))&&
- ((midiline[5]=='0')||(midiline[5]=='1')))
- filtermacros[i]=(midiline[5]-'0')|0x80;
- }
-
- /* read standalone filters */
- for(i=0x80;i<0x100;i++) {
- LoadMidiString(modfp,midiline);
- if((!strncmp(midiline,"F0F00",5))&&
- ((midiline[5]=='0')||(midiline[5]=='1'))) {
- filtersettings[i].filter=(midiline[5]-'0')|0x80;
- dat=(midiline[6])?(midiline[6]-'0'):0;
- if(midiline[7])dat=(dat<<4)|(midiline[7]-'0');
- filtersettings[i].inf=dat;
- }
- }
- } else { /* use default information */
- filtermacros[0]=FILT_CUT;
- for(i=0x80;i<0x90;i++) {
- filtersettings[i].filter=FILT_RESONANT;
- filtersettings[i].inf=(i&0x7f)<<3;
- }
- }
- activemacro=0;
- for(i=0;i<0x80;i++) {
- filtersettings[i].filter=filtermacros[0];
- filtersettings[i].inf=i;
- }
- }
-
- int cvt_c5spd_to_finetune(ULONG c5spd,int sampnum)
- {
- int ctmp=0,tmp,note=1,finetune=0;
-
- c5spd>>=1;
- while((tmp=getfrequency(of.flags,getlinearperiod(note,0)))<c5spd) {
- ctmp=tmp;
- note++;
- }
-
- if(tmp!=c5spd) {
- if((tmp-c5spd)<(c5spd-ctmp))
- while(tmp>c5spd)
- tmp=getfrequency(of.flags,getlinearperiod(note,--finetune));
- else {
- note--;
- while(ctmp<c5spd)
- ctmp=getfrequency(of.flags,getlinearperiod(note,++finetune));
- }
- }
-
- noteindex[sampnum]=note-4*OCTAVE;
- return finetune;
- }
-
- BOOL IT_Load(BOOL curious)
- {
- int t,u,lp;
- INSTRUMENT *d;
- SAMPLE *q;
- BOOL compressed=0;
-
- numtrk=0;
- filters=0;
-
- /* try to read module header */
- _mm_read_I_ULONG(modfp); /* kill the 4 byte header */
- _mm_read_string(mh->songname,26,modfp);
- _mm_read_UBYTES(mh->blank01,2,modfp);
- mh->ordnum =_mm_read_I_UWORD(modfp);
- mh->insnum =_mm_read_I_UWORD(modfp);
- mh->smpnum =_mm_read_I_UWORD(modfp);
- mh->patnum =_mm_read_I_UWORD(modfp);
- mh->cwt =_mm_read_I_UWORD(modfp);
- mh->cmwt =_mm_read_I_UWORD(modfp);
- mh->flags =_mm_read_I_UWORD(modfp);
- mh->special =_mm_read_I_UWORD(modfp);
- mh->globvol =_mm_read_UBYTE(modfp);
- mh->mixvol =_mm_read_UBYTE(modfp);
- mh->initspeed =_mm_read_UBYTE(modfp);
- mh->inittempo =_mm_read_UBYTE(modfp);
- mh->pansep =_mm_read_UBYTE(modfp);
- mh->zerobyte =_mm_read_UBYTE(modfp);
- mh->msglength =_mm_read_I_UWORD(modfp);
- mh->msgoffset =_mm_read_I_ULONG(modfp);
- _mm_read_UBYTES(mh->blank02,4,modfp);
- _mm_read_UBYTES(mh->pantable,64,modfp);
- _mm_read_UBYTES(mh->voltable,64,modfp);
-
- if(feof(modfp)) {
- _mm_errno = MMERR_LOADING_HEADER;
- return 0;
- }
-
- /* set module variables */
- of.songname = DupStr(mh->songname,26); /* make a cstr of songname */
- of.reppos = 0;
- of.numpat = mh->patnum;
- of.numins = mh->insnum;
- of.numsmp = mh->smpnum;
- of.initspeed = mh->initspeed;
- of.inittempo = mh->inittempo;
- of.initvolume = mh->globvol;
-
- /* set the module type */
- /* 2.16 : IT 2.14p3 with resonant filters */
- /* 2.15 : IT 2.14p3 (improved compression) */
- if((mh->cwt==0x216)||(mh->cwt==0x215))
- of.modtype=strdup(IT_Version[mh->cmwt<0x214?2:3]);
- else {
- of.modtype = strdup(IT_Version[mh->cmwt<0x214?0:1]);
- of.modtype[mh->cmwt<0x214?15:26] = (mh->cwt>>8)+'0';
- of.modtype[mh->cmwt<0x214?17:28] = ((mh->cwt>>4)&0xf)+'0';
- of.modtype[mh->cmwt<0x214?18:29] = ((mh->cwt)&0xf)+'0';
- }
-
- old_effect = 0;
- if(mh->flags&8) {
- of.flags|=(UF_XMPERIODS | UF_LINEAR);
- old_effect|=2;
- }
- if((mh->cwt>=0x106)&&(mh->flags&16))
- old_effect|=1;
-
- /* set panning positions */
- for(t=0;t<64;t++) {
- mh->pantable[t]&=0x7f;
- if(mh->pantable[t]<64)
- of.panning[t]=mh->pantable[t]<<2;
- else if(mh->pantable[t]==64)
- of.panning[t]=255;
- else if(mh->pantable[t]==100)
- of.panning[t]=PAN_SURROUND;
- else if(mh->pantable[t]==127)
- of.panning[t]=PAN_CENTER;
- else {
- _mm_errno=MMERR_LOADING_HEADER;
- return 0;
- }
- }
-
- /* set channel volumes */
- memcpy(of.chanvol,mh->voltable,64);
-
- /* read the order data */
- if(!AllocPositions(mh->ordnum)) return 0;
-
- for(t=0;t<mh->ordnum;t++) {
- of.positions[t]=_mm_read_UBYTE(modfp);
- if((of.positions[t]>mh->patnum)&&(of.positions[t]<254))
- of.positions[t]=255;
- }
-
- if(feof(modfp)) {
- _mm_errno = MMERR_LOADING_HEADER;
- return 0;
- }
-
- of.numpos = 0;poslookupcnt=mh->ordnum;
- for(t=0;t<mh->ordnum;t++) {
- of.positions[of.numpos]=of.positions[t];
- poslookup[t]=of.numpos; /* bug fix for freaky S3Ms / ITs */
- if(of.positions[t]<254) of.numpos++;
- else
- /* end of song special pattern */
- if((of.positions[t]==255)&&(!curious)) break;
- }
-
- if(!(paraptr=(ULONG*)_mm_malloc((mh->insnum+mh->smpnum+of.numpat)*
- sizeof(ULONG)))) return 0;
-
- /* read the instrument, sample, and pattern parapointers */
- _mm_read_I_ULONGS(paraptr,mh->insnum+mh->smpnum+of.numpat,modfp);
-
- /* now is a good time to check if the header was too short :) */
- if(feof(modfp)) {
- _mm_errno = MMERR_LOADING_HEADER;
- return 0;
- }
-
- /* Check for and load midi information for resonant filters */
- if(mh->cmwt>=0x216) {
- if(mh->special&8) {
- IT_LoadMidiConfiguration(modfp);
- if(feof(modfp)) {
- _mm_errno = MMERR_LOADING_HEADER;
- return 0;
- }
- } else
- IT_LoadMidiConfiguration(NULL);
- filters=1;
- }
-
- /* Check for and load song comment */
- if((mh->special&1)&&(mh->cwt>=0x104)&&(mh->msglength)) {
- _mm_fseek(modfp,(long)(mh->msgoffset),SEEK_SET);
- if(!ReadComment(mh->msglength)) return 0;
- }
-
- if(!(mh->flags&4)) of.numins=of.numsmp;
- if(!AllocSamples()) return 0;
-
- if(!(noteindex=(int*)_mm_malloc(mh->smpnum*sizeof(int)))) return 0;
-
- /* Load all samples */
- q = of.samples;
- for(t=0;t<mh->smpnum;t++) {
- ITSAMPLE s;
-
- /* seek to sample position */
- _mm_fseek(modfp,(long)(paraptr[mh->insnum+t]+4),SEEK_SET);
-
- /* load sample info */
- _mm_read_string(s.filename,12,modfp);
- s.zerobyte = _mm_read_UBYTE(modfp);
- s.globvol = _mm_read_UBYTE(modfp);
- s.flag = _mm_read_UBYTE(modfp);
- s.volume = _mm_read_UBYTE(modfp);
- _mm_read_string(s.sampname,26,modfp);
- s.convert = _mm_read_UBYTE(modfp);
- s.panning = _mm_read_UBYTE(modfp);
- s.length = _mm_read_I_ULONG(modfp);
- s.loopbeg = _mm_read_I_ULONG(modfp);
- s.loopend = _mm_read_I_ULONG(modfp);
- s.c5spd = _mm_read_I_ULONG(modfp);
- s.susbegin = _mm_read_I_ULONG(modfp);
- s.susend = _mm_read_I_ULONG(modfp);
- s.sampoffset = _mm_read_I_ULONG(modfp);
- s.vibspeed = _mm_read_UBYTE(modfp);
- s.vibdepth = _mm_read_UBYTE(modfp);
- s.vibrate = _mm_read_UBYTE(modfp);
- s.vibwave = _mm_read_UBYTE(modfp);
-
- /* Generate an error if c5spd is > 512k, or samplelength > 256 megs
- (nothing would EVER be that high) */
-
- if(feof(modfp)||(s.c5spd>0x7ffffL)||(s.length>0xfffffffUL)||
- (s.loopbeg>0xfffffffUL)||(s.loopend>0xfffffffUL)) {
- _mm_errno = MMERR_LOADING_SAMPLEINFO;
- return 0;
- }
-
- q->samplename = DupStr(s.sampname,26);
- q->speed = s.c5spd / 2;
- q->panning = ((s.panning&127)==64)?255:(s.panning&127)<<2;
- q->length = s.length;
- q->loopstart = s.loopbeg;
- q->loopend = s.loopend;
- q->volume = s.volume;
- q->globvol = s.globvol;
- q->seekpos = s.sampoffset;
-
- /* Convert speed to XM linear finetune */
- if(of.flags&UF_LINEAR)
- q->speed=cvt_c5spd_to_finetune(s.c5spd,t);
-
- if(s.panning&128) q->flags|=SF_OWNPAN;
-
- if(s.vibrate) {
- q->vibflags |= AV_IT;
- q->vibtype = s.vibwave;
- q->vibsweep = s.vibrate * 2;
- q->vibdepth = s.vibdepth;
- q->vibrate = s.vibspeed;
- }
-
- if(s.flag&2) q->flags|=SF_16BITS;
- if((s.flag&8)&&(mh->cwt>=0x214)) {
- q->flags|=SF_ITPACKED;
- compressed=1;
- }
- if(s.flag&16) q->flags|=SF_LOOP;
- if(s.flag&64) q->flags|=SF_BIDI;
-
- if(mh->cwt>=0x200) {
- if(s.convert&1) q->flags|=SF_SIGNED;
- if(s.convert&4) q->flags|=SF_DELTA;
- }
-
- q++;
- }
-
- /* Load instruments if instrument mode flag enabled */
- if(mh->flags&4) {
- if(!AllocInstruments()) return 0;
- d=of.instruments;
- of.flags|=UF_NNA|UF_INST;
-
- for(t=0;t<mh->insnum;t++) {
- ITINSTHEADER ih;
-
- /* seek to instrument position */
- _mm_fseek(modfp,paraptr[t]+4,SEEK_SET);
-
- /* load instrument info */
- _mm_read_string(ih.filename,12,modfp);
- ih.zerobyte = _mm_read_UBYTE(modfp);
- if(mh->cwt<0x200) {
- /* load IT 1.xx inst header */
- ih.volflg = _mm_read_UBYTE(modfp);
- ih.volbeg = _mm_read_UBYTE(modfp);
- ih.volend = _mm_read_UBYTE(modfp);
- ih.volsusbeg = _mm_read_UBYTE(modfp);
- ih.volsusend = _mm_read_UBYTE(modfp);
- _mm_read_I_UWORD(modfp);
- ih.fadeout = _mm_read_I_UWORD(modfp);
- ih.nna = _mm_read_UBYTE(modfp);
- ih.dnc = _mm_read_UBYTE(modfp);
- } else {
- /* Read IT200+ header */
- ih.nna = _mm_read_UBYTE(modfp);
- ih.dct = _mm_read_UBYTE(modfp);
- ih.dca = _mm_read_UBYTE(modfp);
- ih.fadeout = _mm_read_I_UWORD(modfp);
- ih.ppsep = _mm_read_UBYTE(modfp);
- ih.ppcenter = _mm_read_UBYTE(modfp);
- ih.globvol = _mm_read_UBYTE(modfp);
- ih.chanpan = _mm_read_UBYTE(modfp);
- ih.rvolvar = _mm_read_UBYTE(modfp);
- ih.rpanvar = _mm_read_UBYTE(modfp);
- }
-
- ih.trkvers = _mm_read_I_UWORD(modfp);
- ih.numsmp = _mm_read_UBYTE(modfp);
- _mm_read_UBYTE(modfp);
- _mm_read_string(ih.name,26,modfp);
- _mm_read_UBYTES(ih.blank01,6,modfp);
- _mm_read_I_UWORDS(ih.samptable,ITNOTECNT,modfp);
- if(mh->cwt<0x200) {
- /* load IT 1xx volume envelope */
- _mm_read_UBYTES(ih.volenv,200,modfp);
- for(lp=0;lp<ITENVCNT;lp++) {
- ih.oldvoltick[lp] = _mm_read_UBYTE(modfp);
- ih.volnode[lp] = _mm_read_UBYTE(modfp);
- }
- } else {
- /* load IT 2xx vol & chanpan & pitch envs */
- ih.volflg = _mm_read_UBYTE(modfp);
- ih.volpts = _mm_read_UBYTE(modfp);
- ih.volbeg = _mm_read_UBYTE(modfp);
- ih.volend = _mm_read_UBYTE(modfp);
- ih.volsusbeg = _mm_read_UBYTE(modfp);
- ih.volsusend = _mm_read_UBYTE(modfp);
- for(lp=0;lp<ITENVCNT;lp++) {
- ih.volnode[lp] = _mm_read_UBYTE(modfp);
- ih.voltick[lp] = _mm_read_I_UWORD(modfp);
- }
- _mm_read_UBYTE(modfp);
-
- ih.panflg = _mm_read_UBYTE(modfp);
- ih.panpts = _mm_read_UBYTE(modfp);
- ih.panbeg = _mm_read_UBYTE(modfp);
- ih.panend = _mm_read_UBYTE(modfp);
- ih.pansusbeg = _mm_read_UBYTE(modfp);
- ih.pansusend = _mm_read_UBYTE(modfp);
- for(lp=0;lp<ITENVCNT;lp++) {
- ih.pannode[lp] = _mm_read_SBYTE(modfp);
- ih.pantick[lp] = _mm_read_I_UWORD(modfp);
- }
- _mm_read_UBYTE(modfp);
-
- ih.pitflg = _mm_read_UBYTE(modfp);
- ih.pitpts = _mm_read_UBYTE(modfp);
- ih.pitbeg = _mm_read_UBYTE(modfp);
- ih.pitend = _mm_read_UBYTE(modfp);
- ih.pitsusbeg = _mm_read_UBYTE(modfp);
- ih.pitsusend = _mm_read_UBYTE(modfp);
- for(lp=0;lp<ITENVCNT;lp++) {
- ih.pitnode[lp] = _mm_read_SBYTE(modfp);
- ih.pittick[lp] = _mm_read_I_UWORD(modfp);
- }
- _mm_read_UBYTE(modfp);
- }
-
- if(feof(modfp)) {
- _mm_errno = MMERR_LOADING_SAMPLEINFO;
- return 0;
- }
-
- d->volflg|=EF_VOLENV;
- d->insname = DupStr(ih.name,26);
- d->nnatype = ih.nna;
-
- if(mh->cwt<0x200) {
- d->volfade=ih.fadeout<< 6;
- if(ih.dnc) {
- d->dct=DCT_NOTE;
- d->dca=DCA_CUT;
- }
-
- if(ih.volflg&1) d->volflg|=EF_ON;
- if(ih.volflg&2) d->volflg|=EF_LOOP;
- if(ih.volflg&4) d->volflg|=EF_SUSTAIN;
-
- /* XM conversion of IT envelope Array */
- d->volbeg = ih.volbeg;
- d->volend = ih.volend;
- d->volsusbeg = ih.volsusbeg;
- d->volsusend = ih.volsusend;
-
- if(ih.volflg&1) {
- for(u=0;u<ITENVCNT;u++)
- if(ih.oldvoltick[d->volpts]!=0xff) {
- d->volenv[d->volpts].val=(ih.volnode[d->volpts]<<2);
- d->volenv[d->volpts].pos=ih.oldvoltick[d->volpts];
- d->volpts++;
- } else
- break;
- }
- } else {
- d->panning=((ih.chanpan&127)==64)?255:(ih.chanpan&127)<<2;
- if(!(ih.chanpan&128)) d->flags|=IF_OWNPAN;
-
- if(!(ih.ppsep & 128)) {
- d->pitpansep=ih.ppsep<<2;
- d->pitpancenter=ih.ppcenter;
- d->flags|=IF_PITCHPAN;
- }
- d->globvol=ih.globvol>>1;
- d->volfade=ih.fadeout<<5;
- d->dct =ih.dct;
- d->dca =ih.dca;
-
- if(mh->cwt>=0x204) {
- d->rvolvar = ih.rvolvar;
- d->rpanvar = ih.rpanvar;
- }
-
- if(ih.volflg&1) d->volflg|=EF_ON;
- if(ih.volflg&2) d->volflg|=EF_LOOP;
- if(ih.volflg&4) d->volflg|=EF_SUSTAIN;
-
- if(ih.panflg&1) d->panflg|=EF_ON;
- if(ih.panflg&2) d->panflg|=EF_LOOP;
- if(ih.panflg&4) d->panflg|=EF_SUSTAIN;
-
- if(ih.pitflg&1) d->pitflg|=EF_ON;
- if(ih.pitflg&2) d->pitflg|=EF_LOOP;
- if(ih.pitflg&4) d->pitflg|=EF_SUSTAIN;
- if(ih.pitflg&0x80) {
- /* filter envelopes not supported yet */
- d->pitflg&=~EF_ON;
- #ifdef MIKMOD_DEBUG
- fputs("\rFilter envelopes not supported yet\n",stderr);
- #endif
- }
-
- d->volpts = ih.volpts;
- d->volbeg = ih.volbeg;
- d->volend = ih.volend;
- d->volsusbeg = ih.volsusbeg;
- d->volsusend = ih.volsusend;
-
- for(u=0;u<ih.volpts;u++) {
- d->volenv[u].val=(ih.volnode[u]<<2);
- d->volenv[u].pos=ih.voltick[u];
- }
-
- d->panpts = ih.panpts;
- d->panbeg = ih.panbeg;
- d->panend = ih.panend;
- d->pansusbeg = ih.pansusbeg;
- d->pansusend = ih.pansusend;
-
- for(u=0;u<ih.panpts;u++) {
- d->panenv[u].val=ih.pannode[u]==32?255:(ih.pannode[u]+32)<<2;
- d->panenv[u].pos=ih.pantick[u];
- }
-
- d->pitpts =ih.pitpts;
- d->pitbeg =ih.pitbeg;
- d->pitend =ih.pitend;
- d->pitsusbeg=ih.pitsusbeg;
- d->pitsusend=ih.pitsusend;
-
- for(u=0;u<ih.pitpts;u++) {
- d->pitenv[u].val=ih.pitnode[u]+32;
- d->pitenv[u].pos=ih.pittick[u];
- }
- }
-
- for(u=0;u<ITNOTECNT;u++) {
- d->samplenote[u]=(ih.samptable[u]&255);
- d->samplenumber[u]=
- (ih.samptable[u]>>8)?((ih.samptable[u]>>8)-1):255;
- if(d->samplenumber[u]>=of.numsmp)
- d->samplenote[u]=0;
- 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);
- }
- }
-
- d++;
- }
- } else if(of.flags & UF_LINEAR) {
- if(!AllocInstruments()) return 0;
- d=of.instruments;
- of.flags|=UF_INST;
-
- for(t=0;t<mh->smpnum;t++,d++)
- for(u=0;u<ITNOTECNT;u++)
- d->samplenote[u]+=noteindex[d->samplenumber[u]];
- }
-
- /* Figure out how many channels this blasted song actually uses (what ever
- happened to common courtesy of storing this simple value somewhere in the
- damn module ?) */
-
- of.numchn=0;
- memset(remap,-1,64*sizeof(UBYTE));
- for(t=0;t<of.numpat;t++) {
- UWORD packlen;
-
- /* seek to pattern position */
- if(paraptr[mh->insnum+mh->smpnum+t]) { /* 0 -> empty 64 row pattern */
- _mm_fseek(modfp,((long)paraptr[mh->insnum+mh->smpnum+t]),SEEK_SET);
- _mm_read_I_UWORD(modfp);
- /* read pattern length (# of rows) */
- packlen = _mm_read_I_UWORD(modfp);
- if((packlen<32)||(packlen>200)) {
- _mm_errno=MMERR_LOADING_PATTERN;
- return 0;
- }
- _mm_read_I_ULONG(modfp);
- if(IT_GetNumChannels(packlen)) return 0;
- }
- }
-
- /* give each of them a different number */
- for(t=0;t<64;t++)
- if(!remap[t])
- remap[t]=of.numchn++;
-
- of.numtrk = of.numpat*of.numchn;
-
- if(!AllocPatterns()) return 0;
- if(!AllocTracks()) return 0;
-
- for(t=0;t<of.numpat;t++) {
- UWORD packlen;
-
- /* seek to pattern position */
- if(!paraptr[mh->insnum+mh->smpnum+t]) { /* 0 -> empty 64 row pattern */
- of.pattrows[t]=64;
- for(u=0;u<of.numchn;u++) {
- int k;
-
- UniReset();
- for(k=0;k<64;k++) UniNewline();
- of.tracks[numtrk++]=UniDup();
- }
- } else {
- _mm_fseek(modfp,((long)paraptr[mh->insnum+mh->smpnum+t]),SEEK_SET);
- packlen=_mm_read_I_UWORD(modfp);
- of.pattrows[t]=_mm_read_I_UWORD(modfp);
- _mm_read_I_ULONG(modfp);
- if(!IT_ReadPattern(of.pattrows[t])) return 0;
- }
- }
-
- return 1;
- }
-
- CHAR *IT_LoadTitle(void)
- {
- CHAR s[26];
-
- _mm_fseek(modfp,4,SEEK_SET);
- if(!fread(s,26,1,modfp)) return NULL;
-
- return(DupStr(s,26));
- }
-
- /*========== Loader information */
-
- MLOADER load_it={
- NULL,
- "IT",
- "IT loader v1.0",
- IT_Init,
- IT_Test,
- IT_Load,
- IT_Cleanup,
- IT_LoadTitle
- };
-