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rockbox/apps/plugins/mikmod/load_far.c
Frank Gevaerts 26f2bfde03 Add MikMod plugin, ported by Jason Yu, with some minor work by Craig Mann and William Peters (FS#8806) 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28810 a1c6a512-1295-4272-9138-f99709370657
2010-12-12 15:03:30 +00:00

346 lines
8.1 KiB
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/* 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_far.c,v 1.3 2005/04/07 19:57:38 realtech Exp $
Farandole (FAR) module loader
==============================================================================*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#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 *, ...);
#endif
/*========== Module structure */
typedef struct FARHEADER1 {
UBYTE id[4]; /* file magic */
CHAR songname[40]; /* songname */
CHAR blah[3]; /* 13,10,26 */
UWORD headerlen; /* remaining length of header in bytes */
UBYTE version;
UBYTE onoff[16];
UBYTE edit1[9];
UBYTE speed;
UBYTE panning[16];
UBYTE edit2[4];
UWORD stlen;
} FARHEADER1;
typedef struct FARHEADER2 {
UBYTE orders[256];
UBYTE numpat;
UBYTE snglen;
UBYTE loopto;
UWORD patsiz[256];
} FARHEADER2;
typedef struct FARSAMPLE {
CHAR samplename[32];
ULONG length;
UBYTE finetune;
UBYTE volume;
ULONG reppos;
ULONG repend;
UBYTE type;
UBYTE loop;
} FARSAMPLE;
typedef struct FARNOTE {
UBYTE note,ins,vol,eff;
} FARNOTE;
/*========== Loader variables */
static CHAR FAR_Version[] = "Farandole";
static FARHEADER1 *mh1 = NULL;
static FARHEADER2 *mh2 = NULL;
static FARNOTE *pat = NULL;
static unsigned char FARSIG[4+3]={'F','A','R',0xfe,13,10,26};
/*========== Loader code */
int FAR_Test(void)
{
UBYTE id[47];
if(!_mm_read_UBYTES(id,47,modreader)) return 0;
if((memcmp(id,FARSIG,4))||(memcmp(id+44,FARSIG+4,3))) return 0;
return 1;
}
int FAR_Init(void)
{
if(!(mh1 = (FARHEADER1*)MikMod_malloc(sizeof(FARHEADER1)))) return 0;
if(!(mh2 = (FARHEADER2*)MikMod_malloc(sizeof(FARHEADER2)))) return 0;
if(!(pat = (FARNOTE*)MikMod_malloc(256*16*4*sizeof(FARNOTE)))) return 0;
return 1;
}
void FAR_Cleanup(void)
{
MikMod_free(mh1);
MikMod_free(mh2);
MikMod_free(pat);
}
static UBYTE *FAR_ConvertTrack(FARNOTE* n,int rows)
{
int t,vibdepth=1;
UniReset();
for(t=0;t<rows;t++) {
if(n->note) {
UniInstrument(n->ins);
UniNote(n->note+3*OCTAVE-1);
}
if (n->vol&0xf) UniPTEffect(0xc,(n->vol&0xf)<<2);
if (n->eff)
switch(n->eff>>4) {
case 0x3: /* porta to note */
UniPTEffect(0x3,(n->eff&0xf)<<4);
break;
case 0x4: /* retrigger */
UniPTEffect(0x0e, 0x90 | (n->eff & 0x0f));
break;
case 0x5: /* set vibrato depth */
vibdepth=n->eff&0xf;
break;
case 0x6: /* vibrato */
UniPTEffect(0x4,((n->eff&0xf)<<4)|vibdepth);
break;
case 0x7: /* volume slide up */
UniPTEffect(0xa,(n->eff&0xf)<<4);
break;
case 0x8: /* volume slide down */
UniPTEffect(0xa,n->eff&0xf);
break;
case 0xb: /* panning */
UniPTEffect(0xe,0x80|(n->eff&0xf));
break;
case 0xf: /* set speed */
UniPTEffect(0xf,n->eff&0xf);
break;
/* others not yet implemented */
default:
#ifdef MIKMOD_DEBUG
fprintf(stderr,"\rFAR: unsupported effect %02X\n",n->eff);
#endif
break;
}
UniNewline();
n+=16;
}
return UniDup();
}
int FAR_Load(int curious)
{
int t,u,tracks=0;
SAMPLE *q;
FARSAMPLE s;
FARNOTE *crow;
UBYTE smap[8];
/* try to read module header (first part) */
_mm_read_UBYTES(mh1->id,4,modreader);
_mm_read_SBYTES(mh1->songname,40,modreader);
_mm_read_SBYTES(mh1->blah,3,modreader);
mh1->headerlen = _mm_read_I_UWORD (modreader);
mh1->version = _mm_read_UBYTE (modreader);
_mm_read_UBYTES(mh1->onoff,16,modreader);
_mm_read_UBYTES(mh1->edit1,9,modreader);
mh1->speed = _mm_read_UBYTE(modreader);
_mm_read_UBYTES(mh1->panning,16,modreader);
_mm_read_UBYTES(mh1->edit2,4,modreader);
mh1->stlen = _mm_read_I_UWORD (modreader);
/* init modfile data */
of.modtype = StrDup(FAR_Version);
of.songname = DupStr(mh1->songname,40,1);
of.numchn = 16;
of.initspeed = mh1->speed;
of.inittempo = 80;
of.reppos = 0;
of.flags |= UF_PANNING;
for(t=0;t<16;t++) of.panning[t]=mh1->panning[t]<<4;
/* read songtext into comment field */
if(mh1->stlen)
if (!ReadLinedComment(mh1->stlen, 66)) return 0;
/* try to read module header (second part) */
_mm_read_UBYTES(mh2->orders,256,modreader);
mh2->numpat = _mm_read_UBYTE(modreader);
mh2->snglen = _mm_read_UBYTE(modreader);
mh2->loopto = _mm_read_UBYTE(modreader);
_mm_read_I_UWORDS(mh2->patsiz,256,modreader);
of.numpos = mh2->snglen;
if(!AllocPositions(of.numpos)) return 0;
for(t=0;t<of.numpos;t++) {
if(mh2->orders[t]==0xff) break;
of.positions[t] = mh2->orders[t];
}
/* count number of patterns stored in file */
of.numpat = 0;
for(t=0;t<256;t++)
if(mh2->patsiz[t])
if((t+1)>of.numpat) of.numpat=t+1;
of.numtrk = of.numpat*of.numchn;
/* seek across eventual new data */
_mm_fseek(modreader,mh1->headerlen-(869+mh1->stlen),SEEK_CUR);
/* alloc track and pattern structures */
if(!AllocTracks()) return 0;
if(!AllocPatterns()) return 0;
for(t=0;t<of.numpat;t++) {
UBYTE rows=0,tempo;
memset(pat,0,256*16*4*sizeof(FARNOTE));
if(mh2->patsiz[t]) {
rows = _mm_read_UBYTE(modreader);
tempo = _mm_read_UBYTE(modreader);
crow = pat;
/* file often allocates 64 rows even if there are less in pattern */
if (mh2->patsiz[t]<2+(rows*16*4)) {
_mm_errno = MMERR_LOADING_PATTERN;
return 0;
}
for(u=(mh2->patsiz[t]-2)/4;u;u--,crow++) {
crow->note = _mm_read_UBYTE(modreader);
crow->ins = _mm_read_UBYTE(modreader);
crow->vol = _mm_read_UBYTE(modreader);
crow->eff = _mm_read_UBYTE(modreader);
}
if(_mm_eof(modreader)) {
_mm_errno = MMERR_LOADING_PATTERN;
return 0;
}
crow=pat;
of.pattrows[t] = rows;
for(u=16;u;u--,crow++)
if(!(of.tracks[tracks++]=FAR_ConvertTrack(crow,rows))) {
_mm_errno=MMERR_LOADING_PATTERN;
return 0;
}
} else
tracks+=16;
}
/* read sample map */
if(!_mm_read_UBYTES(smap,8,modreader)) {
_mm_errno = MMERR_LOADING_HEADER;
return 0;
}
/* count number of samples used */
of.numins = 0;
for(t=0;t<64;t++)
if(smap[t>>3]&(1<<(t&7))) of.numins=t+1;
of.numsmp = of.numins;
/* alloc sample structs */
if(!AllocSamples()) return 0;
q = of.samples;
for(t=0;t<of.numsmp;t++) {
q->speed = 8363;
q->flags = SF_SIGNED;
if(smap[t>>3]&(1<<(t&7))) {
_mm_read_SBYTES(s.samplename,32,modreader);
s.length = _mm_read_I_ULONG(modreader);
s.finetune = _mm_read_UBYTE(modreader);
s.volume = _mm_read_UBYTE(modreader);
s.reppos = _mm_read_I_ULONG(modreader);
s.repend = _mm_read_I_ULONG(modreader);
s.type = _mm_read_UBYTE(modreader);
s.loop = _mm_read_UBYTE(modreader);
q->samplename = DupStr(s.samplename,32,1);
q->length = s.length;
q->loopstart = s.reppos;
q->loopend = s.repend;
q->volume = s.volume<<2;
if(s.type&1) q->flags|=SF_16BITS;
if(s.loop&8) q->flags|=SF_LOOP;
q->seekpos = _mm_ftell(modreader);
_mm_fseek(modreader,q->length,SEEK_CUR);
} else
q->samplename = DupStr(NULL,0,0);
q++;
}
return 1;
}
CHAR *FAR_LoadTitle(void)
{
CHAR s[40];
_mm_fseek(modreader,4,SEEK_SET);
if(!_mm_read_UBYTES(s,40,modreader)) return NULL;
return(DupStr(s,40,1));
}
/*========== Loader information */
MIKMODAPI MLOADER load_far={
NULL,
"FAR",
"FAR (Farandole Composer)",
FAR_Init,
FAR_Test,
FAR_Load,
FAR_Cleanup,
FAR_LoadTitle
};
/* ex:set ts=4: */
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