load_it.c
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上传日期:2014-04-03
资源大小:7248k
文件大小:28k
源码类别:
Windows CE
开发平台:
C/C++
- /* MikMod sound library
- (c) 1998, 1999, 2000, 2001, 2002 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., 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA.
- */
- /*==============================================================================
- $Id: load_it.c,v 1.2 2004/02/06 19:29:03 raph Exp $
- Impulse tracker (IT) module loader
- ==============================================================================*/
- #ifdef HAVE_CONFIG_H
- #include "config.h"
- #endif
- #ifdef HAVE_UNISTD_H
- #include <unistd.h>
- #endif
- #include <ctype.h>
- #include <stdio.h>
- #ifdef HAVE_MEMORY_H
- #include <memory.h>
- #endif
- #include <string.h>
- #include "mikmod_internals.h"
- #ifdef SUNOS
- extern int fprintf(FILE *, const char *, ...);
- extern int toupper(int);
- #endif
- /*========== 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) */
- } 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) channel 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]; /* amplitude 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 unsigned int old_effect; /* if set, use S3M old-effects stuffs */
- static CHAR* IT_Version[]={
- "ImpulseTracker . ",
- "Compressed ImpulseTracker . ",
- "ImpulseTracker 2.14p3",
- "Compressed ImpulseTracker 2.14p3",
- "ImpulseTracker 2.14p4",
- "Compressed ImpulseTracker 2.14p4",
- };
- /* 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 */
- BOOL IT_Test(void)
- {
- UBYTE id[4];
- if(!_mm_read_UBYTES(id,4,modreader)) 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(200*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)
- {
- FreeLinear();
- _mm_free(mh);
- _mm_free(poslookup);
- _mm_free(itpat);
- _mm_free(mask);
- _mm_free(last);
- _mm_free(paraptr);
- _mm_free(origpositions);
- }
- /* Because so many IT files have 64 channels as the set number used, but really
- only use far less (usually from 8 to 24 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
- */
- static BOOL IT_GetNumChannels(UWORD patrows)
- {
- int row=0,flag,ch;
- do {
- if((flag=_mm_read_UBYTE(modreader))==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(modreader);
- if(mask[ch]&1) _mm_read_UBYTE(modreader);
- if(mask[ch]&2) _mm_read_UBYTE(modreader);
- if(mask[ch]&4) _mm_read_UBYTE(modreader);
- if(mask[ch]&8) { _mm_read_UBYTE(modreader);_mm_read_UBYTE(modreader); }
- }
- } while(row<patrows);
- return 0;
- }
- static 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)
- UniWriteByte(UNI_KEYOFF);
- else if(note==254) {
- UniPTEffect(0xc,-1); /* note cut command */
- volpan=255;
- } else
- UniNote(note);
- }
- if((ins)&&(ins<100))
- UniInstrument(ins-1);
- else if(ins==253)
- UniWriteByte(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==65) /* fine volume slide up (65-74) - A0 case */
- UniVolEffect(VOL_VOLSLIDE,0);
- else if(volpan<=74) { /* fine volume slide up (65-74) - general case */
- UniVolEffect(VOL_VOLSLIDE,0x0f+((volpan-65)<<4));
- } else if(volpan==75) /* fine volume slide down (75-84) - B0 case */
- UniVolEffect(VOL_VOLSLIDE,0);
- else if(volpan<=84) { /* fine volume slide down (75-84) - general case*/
- 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));
- 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!=239)&&(volpan!=255)) { /* crap */
- _mm_errno=MMERR_LOADING_PATTERN;
- return NULL;
- }
- S3MIT_ProcessCmd(tr[t*of.numchn].cmd,tr[t*of.numchn].inf,
- old_effect|S3MIT_IT);
- UniNewline();
- }
- return UniDup();
- }
- static BOOL IT_ReadPattern(UWORD patrows)
- {
- int row=0,flag,ch,blah;
- ITNOTE *itt=itpat,dummy,*n,*l;
- memset(itt,255,200*64*sizeof(ITNOTE));
- do {
- if((flag=_mm_read_UBYTE(modreader))==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(modreader);
- if(mask[ch]&1)
- /* convert IT note off to internal note off */
- if((l->note=n->note=_mm_read_UBYTE(modreader))==255)
- l->note=n->note=253;
- if(mask[ch]&2)
- l->ins=n->ins=_mm_read_UBYTE(modreader);
- if(mask[ch]&4)
- l->volpan=n->volpan=_mm_read_UBYTE(modreader);
- if(mask[ch]&8) {
- l->cmd=n->cmd=_mm_read_UBYTE(modreader);
- l->inf=n->inf=_mm_read_UBYTE(modreader);
- }
- 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;
- }
- static void LoadMidiString(MREADER* modreader,CHAR* dest)
- {
- CHAR *cur,*last;
- _mm_read_UBYTES(dest,32,modreader);
- cur=last=dest;
- /* remove blanks and uppercase all */
- while(*last) {
- if(isalnum((int)*last)) *(cur++)=toupper((int)*last);
- last++;
- }
- *cur=0;
- }
- /* Load embedded midi information for resonant filters */
- static void IT_LoadMidiConfiguration(MREADER* modreader)
- {
- int i;
- memset(filtermacros,0,sizeof(filtermacros));
- memset(filtersettings,0,sizeof(filtersettings));
- if (modreader) { /* information is embedded in file */
- UWORD dat;
- CHAR midiline[33];
- dat=_mm_read_I_UWORD(modreader);
- _mm_fseek(modreader,8*dat+0x120,SEEK_CUR);
- /* read midi macros */
- for(i=0;i<UF_MAXMACRO;i++) {
- LoadMidiString(modreader,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(modreader,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;
- }
- }
- 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(modreader); /* kill the 4 byte header */
- _mm_read_string(mh->songname,26,modreader);
- _mm_read_UBYTES(mh->blank01,2,modreader);
- mh->ordnum =_mm_read_I_UWORD(modreader);
- mh->insnum =_mm_read_I_UWORD(modreader);
- mh->smpnum =_mm_read_I_UWORD(modreader);
- mh->patnum =_mm_read_I_UWORD(modreader);
- mh->cwt =_mm_read_I_UWORD(modreader);
- mh->cmwt =_mm_read_I_UWORD(modreader);
- mh->flags =_mm_read_I_UWORD(modreader);
- mh->special =_mm_read_I_UWORD(modreader);
- mh->globvol =_mm_read_UBYTE(modreader);
- mh->mixvol =_mm_read_UBYTE(modreader);
- mh->initspeed =_mm_read_UBYTE(modreader);
- mh->inittempo =_mm_read_UBYTE(modreader);
- mh->pansep =_mm_read_UBYTE(modreader);
- mh->zerobyte =_mm_read_UBYTE(modreader);
- mh->msglength =_mm_read_I_UWORD(modreader);
- mh->msgoffset =_mm_read_I_ULONG(modreader);
- _mm_read_UBYTES(mh->blank02,4,modreader);
- _mm_read_UBYTES(mh->pantable,64,modreader);
- _mm_read_UBYTES(mh->voltable,64,modreader);
- if(_mm_eof(modreader)) {
- _mm_errno=MMERR_LOADING_HEADER;
- return 0;
- }
- /* set module variables */
- of.songname = DupStr(mh->songname,26,0); /* 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;
- of.flags |= UF_BGSLIDES | UF_ARPMEM;
- if (!(mh->flags & 1))
- of.flags |= UF_PANNING;
- of.bpmlimit=32;
- if(mh->songname[25]) {
- of.numvoices=1+mh->songname[25];
- #ifdef MIKMOD_DEBUG
- fprintf(stderr,"Embedded IT limitation to %d voicesn",of.numvoices);
- #endif
- }
- /* set the module type */
- /* 2.17 : IT 2.14p4 */
- /* 2.16 : IT 2.14p3 with resonant filters */
- /* 2.15 : IT 2.14p3 (improved compression) */
- if((mh->cwt<=0x219)&&(mh->cwt>=0x217))
- of.modtype=strdup(IT_Version[mh->cmwt<0x214?4:5]);
- else if (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';
- }
- if(mh->flags&8)
- of.flags |= UF_XMPERIODS | UF_LINEAR;
- if((mh->cwt>=0x106)&&(mh->flags&16))
- old_effect=S3MIT_OLDSTYLE;
- else
- old_effect=0;
- /* set panning positions */
- if (mh->flags & 1)
- 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;
- }
- }
- else
- for(t=0;t<64;t++)
- of.panning[t]=PAN_CENTER;
- /* set channel volumes */
- memcpy(of.chanvol,mh->voltable,64);
- /* read the order data */
- if(!AllocPositions(mh->ordnum)) return 0;
- if(!(origpositions=_mm_calloc(mh->ordnum,sizeof(UWORD)))) return 0;
- for(t=0;t<mh->ordnum;t++) {
- origpositions[t]=_mm_read_UBYTE(modreader);
- if((origpositions[t]>mh->patnum)&&(origpositions[t]<254))
- origpositions[t]=255;
- }
- if(_mm_eof(modreader)) {
- _mm_errno = MMERR_LOADING_HEADER;
- return 0;
- }
- poslookupcnt=mh->ordnum;
- S3MIT_CreateOrders(curious);
- 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,modreader);
- if(_mm_eof(modreader)) {
- _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(modreader);
- if(_mm_eof(modreader)) {
- _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(modreader,(long)(mh->msgoffset),SEEK_SET);
- if(!ReadComment(mh->msglength)) return 0;
- }
- if(!(mh->flags&4)) of.numins=of.numsmp;
- if(!AllocSamples()) return 0;
- if(!AllocLinear()) return 0;
- /* Load all samples */
- q = of.samples;
- for(t=0;t<mh->smpnum;t++) {
- ITSAMPLE s;
- /* seek to sample position */
- _mm_fseek(modreader,(long)(paraptr[mh->insnum+t]+4),SEEK_SET);
- /* load sample info */
- _mm_read_string(s.filename,12,modreader);
- s.zerobyte = _mm_read_UBYTE(modreader);
- s.globvol = _mm_read_UBYTE(modreader);
- s.flag = _mm_read_UBYTE(modreader);
- s.volume = _mm_read_UBYTE(modreader);
- _mm_read_string(s.sampname,26,modreader);
- s.convert = _mm_read_UBYTE(modreader);
- s.panning = _mm_read_UBYTE(modreader);
- s.length = _mm_read_I_ULONG(modreader);
- s.loopbeg = _mm_read_I_ULONG(modreader);
- s.loopend = _mm_read_I_ULONG(modreader);
- s.c5spd = _mm_read_I_ULONG(modreader);
- s.susbegin = _mm_read_I_ULONG(modreader);
- s.susend = _mm_read_I_ULONG(modreader);
- s.sampoffset = _mm_read_I_ULONG(modreader);
- s.vibspeed = _mm_read_UBYTE(modreader);
- s.vibdepth = _mm_read_UBYTE(modreader);
- s.vibrate = _mm_read_UBYTE(modreader);
- s.vibwave = _mm_read_UBYTE(modreader);
- /* Generate an error if c5spd is > 512k, or samplelength > 256 megs
- (nothing would EVER be that high) */
- if(_mm_eof(modreader)||(s.c5spd>0x7ffffL)||(s.length>0xfffffffUL)) {
- _mm_errno = MMERR_LOADING_SAMPLEINFO;
- return 0;
- }
- /* Reality check for sample loop information */
- if((s.flag&16)&&
- ((s.loopbeg>0xfffffffUL)||(s.loopend>0xfffffffUL))) {
- _mm_errno = MMERR_LOADING_SAMPLEINFO;
- return 0;
- }
- q->samplename = DupStr(s.sampname,26,0);
- 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=speed_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(modreader,paraptr[t]+4,SEEK_SET);
- /* load instrument info */
- _mm_read_string(ih.filename,12,modreader);
- ih.zerobyte = _mm_read_UBYTE(modreader);
- if(mh->cwt<0x200) {
- /* load IT 1.xx inst header */
- ih.volflg = _mm_read_UBYTE(modreader);
- ih.volbeg = _mm_read_UBYTE(modreader);
- ih.volend = _mm_read_UBYTE(modreader);
- ih.volsusbeg = _mm_read_UBYTE(modreader);
- ih.volsusend = _mm_read_UBYTE(modreader);
- _mm_read_I_UWORD(modreader);
- ih.fadeout = _mm_read_I_UWORD(modreader);
- ih.nna = _mm_read_UBYTE(modreader);
- ih.dnc = _mm_read_UBYTE(modreader);
- } else {
- /* Read IT200+ header */
- ih.nna = _mm_read_UBYTE(modreader);
- ih.dct = _mm_read_UBYTE(modreader);
- ih.dca = _mm_read_UBYTE(modreader);
- ih.fadeout = _mm_read_I_UWORD(modreader);
- ih.ppsep = _mm_read_UBYTE(modreader);
- ih.ppcenter = _mm_read_UBYTE(modreader);
- ih.globvol = _mm_read_UBYTE(modreader);
- ih.chanpan = _mm_read_UBYTE(modreader);
- ih.rvolvar = _mm_read_UBYTE(modreader);
- ih.rpanvar = _mm_read_UBYTE(modreader);
- }
- ih.trkvers = _mm_read_I_UWORD(modreader);
- ih.numsmp = _mm_read_UBYTE(modreader);
- _mm_read_UBYTE(modreader);
- _mm_read_string(ih.name,26,modreader);
- _mm_read_UBYTES(ih.blank01,6,modreader);
- _mm_read_I_UWORDS(ih.samptable,ITNOTECNT,modreader);
- if(mh->cwt<0x200) {
- /* load IT 1xx volume envelope */
- _mm_read_UBYTES(ih.volenv,200,modreader);
- for(lp=0;lp<ITENVCNT;lp++) {
- ih.oldvoltick[lp] = _mm_read_UBYTE(modreader);
- ih.volnode[lp] = _mm_read_UBYTE(modreader);
- }
- } else {
- /* load IT 2xx volume, pan and pitch envelopes */
- #if defined __STDC__ || defined _MSC_VER || defined MPW_C
- #define IT_LoadEnvelope(name,type)
- ih. name##flg =_mm_read_UBYTE(modreader);
- ih. name##pts =_mm_read_UBYTE(modreader);
- ih. name##beg =_mm_read_UBYTE(modreader);
- ih. name##end =_mm_read_UBYTE(modreader);
- ih. name##susbeg=_mm_read_UBYTE(modreader);
- ih. name##susend=_mm_read_UBYTE(modreader);
- for(lp=0;lp<ITENVCNT;lp++) {
- ih. name##node[lp]=_mm_read_##type (modreader);
- ih. name##tick[lp]=_mm_read_I_UWORD(modreader);
- }
- _mm_read_UBYTE(modreader)
- #else
- #define IT_LoadEnvelope(name,type)
- ih. name/**/flg =_mm_read_UBYTE(modreader);
- ih. name/**/pts =_mm_read_UBYTE(modreader);
- ih. name/**/beg =_mm_read_UBYTE(modreader);
- ih. name/**/end =_mm_read_UBYTE(modreader);
- ih. name/**/susbeg=_mm_read_UBYTE(modreader);
- ih. name/**/susend=_mm_read_UBYTE(modreader);
- for(lp=0;lp<ITENVCNT;lp++) {
- ih. name/**/node[lp]=_mm_read_/**/type (modreader);
- ih. name/**/tick[lp]=_mm_read_I_UWORD(modreader);
- }
- _mm_read_UBYTE(modreader)
- #endif
- IT_LoadEnvelope(vol,UBYTE);
- IT_LoadEnvelope(pan,SBYTE);
- IT_LoadEnvelope(pit,SBYTE);
- #undef IT_LoadEnvelope
- }
- if(_mm_eof(modreader)) {
- _mm_errno = MMERR_LOADING_SAMPLEINFO;
- return 0;
- }
- d->volflg|=EF_VOLENV;
- d->insname = DupStr(ih.name,26,0);
- d->nnatype = ih.nna & NNA_MASK;
- 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 defined __STDC__ || defined _MSC_VER || defined MPW_C
- #define IT_ProcessEnvelope(name)
- if(ih. name##flg&1) d-> name##flg|=EF_ON;
- if(ih. name##flg&2) d-> name##flg|=EF_LOOP;
- if(ih. name##flg&4) d-> name##flg|=EF_SUSTAIN;
- d-> name##pts=ih. name##pts;
- d-> name##beg=ih. name##beg;
- d-> name##end=ih. name##end;
- d-> name##susbeg=ih. name##susbeg;
- d-> name##susend=ih. name##susend;
- for(u=0;u<ih. name##pts;u++)
- d-> name##env[u].pos=ih. name##tick[u];
- if((d-> name##flg&EF_ON)&&(d-> name##pts<2))
- d-> name##flg&=~EF_ON
- #else
- #define IT_ProcessEnvelope(name)
- if(ih. name/**/flg&1) d-> name/**/flg|=EF_ON;
- if(ih. name/**/flg&2) d-> name/**/flg|=EF_LOOP;
- if(ih. name/**/flg&4) d-> name/**/flg|=EF_SUSTAIN;
- d-> name/**/pts=ih. name/**/pts;
- d-> name/**/beg=ih. name/**/beg;
- d-> name/**/end=ih. name/**/end;
- d-> name/**/susbeg=ih. name/**/susbeg;
- d-> name/**/susend=ih. name/**/susend;
- for(u=0;u<ih. name/**/pts;u++)
- d-> name/**/env[u].pos=ih. name/**/tick[u];
- if((d-> name/**/flg&EF_ON)&&(d-> name/**/pts<2))
- d-> name/**/flg&=~EF_ON
- #endif
- IT_ProcessEnvelope(vol);
- for(u=0;u<ih.volpts;u++)
- d->volenv[u].val=(ih.volnode[u]<<2);
- IT_ProcessEnvelope(pan);
- for(u=0;u<ih.panpts;u++)
- d->panenv[u].val=
- ih.pannode[u]==32?255:(ih.pannode[u]+32)<<2;
- IT_ProcessEnvelope(pit);
- for(u=0;u<ih.pitpts;u++)
- d->pitenv[u].val=ih.pitnode[u]+32;
- #undef IT_ProcessEnvelope
- if(ih.pitflg&0x80) {
- /* filter envelopes not supported yet */
- d->pitflg&=~EF_ON;
- ih.pitpts=ih.pitbeg=ih.pitend=0;
- #ifdef MIKMOD_DEBUG
- {
- static int warn=0;
- if(!warn)
- fprintf(stderr, "rFilter envelopes not supported yetn");
- warn=1;
- }
- #endif
- }
- }
- 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):0xffff;
- if(d->samplenumber[u]>=of.numsmp)
- d->samplenote[u]=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);
- }
- }
- 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++) {
- if(d->samplenumber[u]>=of.numsmp)
- d->samplenote[u]=255;
- else {
- int note=(int)d->samplenote[u]+noteindex[d->samplenumber[u]];
- d->samplenote[u]=(note<0)?0:(note>255?255:note);
- }
- }
- }
- /* Figure out how many channels this song actually uses */
- of.numchn=0;
- memset(remap,-1,UF_MAXCHAN*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(modreader,((long)paraptr[mh->insnum+mh->smpnum+t]),SEEK_SET);
- _mm_read_I_UWORD(modreader);
- /* read pattern length (# of rows)
- Impulse Tracker never creates patterns with less than 32 rows,
- but some other trackers do, so we only check for more than 256
- rows */
- packlen=_mm_read_I_UWORD(modreader);
- if(packlen>256) {
- _mm_errno=MMERR_LOADING_PATTERN;
- return 0;
- }
- _mm_read_I_ULONG(modreader);
- if(IT_GetNumChannels(packlen)) return 0;
- }
- }
- /* give each of them a different number */
- for(t=0;t<UF_MAXCHAN;t++)
- if(!remap[t])
- remap[t]=of.numchn++;
- of.numtrk = of.numpat*of.numchn;
- if(of.numvoices)
- if (of.numvoices<of.numchn) of.numvoices=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(modreader,((long)paraptr[mh->insnum+mh->smpnum+t]),SEEK_SET);
- packlen=_mm_read_I_UWORD(modreader);
- of.pattrows[t]=_mm_read_I_UWORD(modreader);
- _mm_read_I_ULONG(modreader);
- if(!IT_ReadPattern(of.pattrows[t])) return 0;
- }
- }
- return 1;
- }
- CHAR *IT_LoadTitle(void)
- {
- CHAR s[26];
- _mm_fseek(modreader,4,SEEK_SET);
- if(!_mm_read_UBYTES(s,26,modreader)) return NULL;
- return(DupStr(s,26,0));
- }
- /*========== Loader information */
- MIKMODAPI MLOADER load_it={
- NULL,
- "IT",
- "IT (Impulse Tracker)",
- IT_Init,
- IT_Test,
- IT_Load,
- IT_Cleanup,
- IT_LoadTitle
- };
- /* ex:set ts=4: */