diff options
| author | norly <ny-git@enpas.org> | 2019-04-26 16:26:03 +0200 |
|---|---|---|
| committer | norly <ny-git@enpas.org> | 2019-04-26 16:33:30 +0200 |
| commit | 6ca1a0f9cd1e5400701ad1ec7d09206aa75ff2f9 (patch) | |
| tree | 624197580f28583cf6b289d6852bd4bb5796711a /apps/plugins/mikmod/loaders/load_stx.c | |
| parent | 1b98f7c930017b5becdb28409eac170c843f23f2 (diff) | |
This is an early port of MikMod to Rockbox that I did back in 2007.
It was one of my early exercises in the C language.
Since I didn't upstream it back then, someone else ended up porting it
with a nicer UI.
Fun fact:
This version's PCM buffers are designed to be just about large enough
to allow an iPod Video to render fm-2year/rapido.xm without pausing.
Diffstat (limited to 'apps/plugins/mikmod/loaders/load_stx.c')
| -rw-r--r-- | apps/plugins/mikmod/loaders/load_stx.c | 439 |
1 files changed, 439 insertions, 0 deletions
diff --git a/apps/plugins/mikmod/loaders/load_stx.c b/apps/plugins/mikmod/loaders/load_stx.c new file mode 100644 index 0000000..66e67f0 --- /dev/null +++ b/apps/plugins/mikmod/loaders/load_stx.c @@ -0,0 +1,439 @@ +/* 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_stx.c,v 1.1.1.1 2004/01/21 01:36:35 raph Exp $
+
+ STMIK 0.2 (STX) module loader
+
+==============================================================================*/
+
+/*
+
+ Written by Claudio Matsuoka <claudio@helllabs.org>
+
+*/
+
+#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 */
+
+/* header */
+typedef struct STXHEADER {
+ CHAR songname[20];
+ CHAR trackername[8];
+ UWORD patsize;
+ UWORD unknown1;
+ UWORD patptr;
+ UWORD insptr;
+ UWORD chnptr; /* not sure */
+ UWORD unknown2;
+ UWORD unknown3;
+ UBYTE mastermult;
+ UBYTE initspeed;
+ UWORD unknown4;
+ UWORD unknown5;
+ UWORD patnum;
+ UWORD insnum;
+ UWORD ordnum;
+ UWORD unknown6;
+ UWORD unknown7;
+ UWORD unknown8;
+ CHAR scrm[4];
+} STXHEADER;
+
+/* sample information */
+typedef struct STXSAMPLE {
+ UBYTE type;
+ CHAR filename[12];
+ UBYTE memsegh;
+ UWORD memsegl;
+ ULONG length;
+ ULONG loopbeg;
+ ULONG loopend;
+ UBYTE volume;
+ UBYTE dsk;
+ UBYTE pack;
+ UBYTE flags;
+ ULONG c2spd;
+ UBYTE unused[12];
+ CHAR sampname[28];
+ CHAR scrs[4];
+} STXSAMPLE;
+
+typedef struct STXNOTE {
+ UBYTE note,ins,vol,cmd,inf;
+} STXNOTE;
+
+/*========== Loader variables */
+
+static STXNOTE *stxbuf = NULL; /* pointer to a complete STX pattern */
+static STXHEADER *mh = NULL;
+static UWORD *paraptr = NULL; /* parapointer array (see STX docs) */
+
+/*========== Loader code */
+
+static BOOL STX_Test(void)
+{
+ UBYTE id[8];
+ int t;
+
+ _mm_fseek(modreader,0x3C,SEEK_SET);
+ if(!_mm_read_UBYTES(id,4,modreader)) return 0;
+ if(memcmp(id,"SCRM",4)) return 0;
+
+ _mm_fseek(modreader,0x14,SEEK_SET);
+ if(!_mm_read_UBYTES(id,8,modreader)) return 0;
+
+ for(t=0;t<STM_NTRACKERS;t++)
+ if(!memcmp(id,STM_Signatures[t],8)) return 1;
+
+ return 0;
+}
+
+static BOOL STX_Init(void)
+{
+ if(!(stxbuf=(STXNOTE*)_mm_malloc(4*64*sizeof(STXNOTE)))) return 0;
+ if(!(mh=(STXHEADER*)_mm_malloc(sizeof(STXHEADER)))) return 0;
+ if(!(poslookup=(UBYTE*)_mm_malloc(sizeof(UBYTE)*256))) return 0;
+ memset(poslookup,-1,256);
+
+ return 1;
+}
+
+static void STX_Cleanup(void)
+{
+ _mm_free(stxbuf);
+ _mm_free(paraptr);
+ _mm_free(poslookup);
+ _mm_free(mh);
+}
+
+static BOOL STX_ReadPattern(void)
+{
+ int row=0,flag,ch;
+ STXNOTE *n,dummy;
+
+ /* clear pattern data */
+ memset(stxbuf,255,4*64*sizeof(STXNOTE));
+
+ while(row<64) {
+ flag=_mm_read_UBYTE(modreader);
+
+ if(_mm_eof(modreader)) {
+ _mm_errno = MMERR_LOADING_PATTERN;
+ return 0;
+ }
+
+ if(flag) {
+ ch=flag&31;
+
+ if((ch>=0)&&(ch<4))
+ n=&stxbuf[(64U*ch)+row];
+ else
+ n=&dummy;
+
+ if(flag&32) {
+ n->note=_mm_read_UBYTE(modreader);
+ n->ins=_mm_read_UBYTE(modreader);
+ }
+ if(flag&64) {
+ n->vol=_mm_read_UBYTE(modreader);
+ if(n->vol>64) n->vol=64;
+ }
+ if(flag&128) {
+ n->cmd=_mm_read_UBYTE(modreader);
+ n->inf=_mm_read_UBYTE(modreader);
+ }
+ } else row++;
+ }
+ return 1;
+}
+
+static UBYTE* STX_ConvertTrack(STXNOTE* tr)
+{
+ int t;
+
+ UniReset();
+ for(t=0;t<64;t++) {
+ UBYTE note,ins,vol,cmd,inf;
+
+ note=tr[t].note;
+ ins=tr[t].ins;
+ vol=tr[t].vol;
+ cmd=tr[t].cmd;
+ inf=tr[t].inf;
+
+ if((ins)&&(ins!=255)) UniInstrument(ins-1);
+ if((note)&&(note!=255)) {
+ if(note==254) {
+ UniPTEffect(0xc,0); /* note cut command */
+ vol=255;
+ } else UniNote(24+((note>>4)*OCTAVE)+(note&0xf)); /* normal note */
+ }
+
+ if(vol<255) UniPTEffect(0xc,vol);
+
+ if(cmd<255) switch(cmd) {
+ case 1: /* Axx set speed to xx */
+ UniPTEffect(0xf,inf>>4);
+ break;
+ case 2: /* Bxx position jump */
+ UniPTEffect(0xb,inf);
+ break;
+ case 3: /* Cxx patternbreak to row xx */
+ UniPTEffect(0xd,(((inf&0xf0)>>4)*10)+(inf&0xf));
+ break;
+ case 4: /* Dxy volumeslide */
+ UniEffect(UNI_S3MEFFECTD,inf);
+ break;
+ case 5: /* Exy toneslide down */
+ UniEffect(UNI_S3MEFFECTE,inf);
+ break;
+ case 6: /* Fxy toneslide up */
+ UniEffect(UNI_S3MEFFECTF,inf);
+ break;
+ case 7: /* Gxx Tone portamento,speed xx */
+ UniPTEffect(0x3,inf);
+ break;
+ case 8: /* Hxy vibrato */
+ UniPTEffect(0x4,inf);
+ break;
+ case 9: /* Ixy tremor, ontime x, offtime y */
+ UniEffect(UNI_S3MEFFECTI,inf);
+ break;
+ case 0: /* protracker arpeggio */
+ if(!inf) break;
+ /* fall through */
+ case 0xa: /* Jxy arpeggio */
+ UniPTEffect(0x0,inf);
+ break;
+ case 0xb: /* Kxy Dual command H00 & Dxy */
+ UniPTEffect(0x4,0);
+ UniEffect(UNI_S3MEFFECTD,inf);
+ break;
+ case 0xc: /* Lxy Dual command G00 & Dxy */
+ UniPTEffect(0x3,0);
+ UniEffect(UNI_S3MEFFECTD,inf);
+ break;
+ /* Support all these above, since ST2 can LOAD these values but can
+ actually only play up to J - and J is only half-way implemented
+ in ST2 */
+ case 0x18: /* Xxx amiga panning command 8xx */
+ UniPTEffect(0x8,inf);
+ of.flags |= UF_PANNING;
+ break;
+ }
+ UniNewline();
+ }
+ return UniDup();
+}
+
+static BOOL STX_Load(BOOL curious)
+{
+ int t,u,track = 0;
+ int version = 0;
+ SAMPLE *q;
+
+ /* try to read module header */
+ _mm_read_string(mh->songname,20,modreader);
+ _mm_read_string(mh->trackername,8,modreader);
+ mh->patsize =_mm_read_I_UWORD(modreader);
+ mh->unknown1 =_mm_read_I_UWORD(modreader);
+ mh->patptr =_mm_read_I_UWORD(modreader);
+ mh->insptr =_mm_read_I_UWORD(modreader);
+ mh->chnptr =_mm_read_I_UWORD(modreader);
+ mh->unknown2 =_mm_read_I_UWORD(modreader);
+ mh->unknown3 =_mm_read_I_UWORD(modreader);
+ mh->mastermult =_mm_read_UBYTE(modreader);
+ mh->initspeed =_mm_read_UBYTE(modreader)>>4;
+ mh->unknown4 =_mm_read_I_UWORD(modreader);
+ mh->unknown5 =_mm_read_I_UWORD(modreader);
+ mh->patnum =_mm_read_I_UWORD(modreader);
+ mh->insnum =_mm_read_I_UWORD(modreader);
+ mh->ordnum =_mm_read_I_UWORD(modreader);
+ mh->unknown6 =_mm_read_I_UWORD(modreader);
+ mh->unknown7 =_mm_read_I_UWORD(modreader);
+ mh->unknown8 =_mm_read_I_UWORD(modreader);
+ _mm_read_string(mh->scrm,4,modreader);
+
+ if(_mm_eof(modreader)) {
+ _mm_errno = MMERR_LOADING_HEADER;
+ return 0;
+ }
+
+ /* set module variables */
+ of.songname = DupStr(mh->songname,20,1);
+ of.numpat = mh->patnum;
+ of.reppos = 0;
+ of.numins = of.numsmp = mh->insnum;
+ of.initspeed = mh->initspeed;
+ of.inittempo = 125;
+ of.numchn = 4;
+ of.flags |= UF_S3MSLIDES;
+ of.bpmlimit = 32;
+
+ if(!(paraptr=(UWORD*)_mm_malloc((of.numins+of.numpat)*sizeof(UWORD))))
+ return 0;
+
+ /* read the instrument+pattern parapointers */
+ _mm_fseek(modreader,mh->insptr<<4,SEEK_SET);
+ _mm_read_I_UWORDS(paraptr,of.numins,modreader);
+ _mm_fseek(modreader,mh->patptr<<4,SEEK_SET);
+ _mm_read_I_UWORDS(paraptr+of.numins,of.numpat,modreader);
+
+ /* check module version */
+ _mm_fseek(modreader,paraptr[of.numins]<<4,SEEK_SET);
+ version=_mm_read_I_UWORD(modreader);
+ if(version==mh->patsize) {
+ version = 0x10;
+ of.modtype = strdup("STMIK 0.2 (STM2STX 1.0)");
+ } else {
+ version = 0x11;
+ of.modtype = strdup("STMIK 0.2 (STM2STX 1.1)");
+ }
+
+ /* read the order data */
+ _mm_fseek(modreader,(mh->chnptr<<4)+32,SEEK_SET);
+ if(!AllocPositions(mh->ordnum)) return 0;
+ for(t=0;t<mh->ordnum;t++) {
+ of.positions[t]=_mm_read_UBYTE(modreader);
+ _mm_fseek(modreader,4,SEEK_CUR);
+ }
+
+ of.numpos=0;poslookupcnt=mh->ordnum;
+ for(t=0;t<mh->ordnum;t++) {
+ int order=of.positions[t];
+ if(order==255) order=LAST_PATTERN;
+ of.positions[of.numpos]=order;
+ poslookup[t]=of.numpos; /* bug fix for freaky S3Ms */
+ if(of.positions[t]<254) of.numpos++;
+ else
+ /* special end of song pattern */
+ if((order==LAST_PATTERN)&&(!curious)) break;
+ }
+
+ if(_mm_eof(modreader)) {
+ _mm_errno = MMERR_LOADING_HEADER;
+ return 0;
+ }
+
+ /* load samples */
+ if(!AllocSamples()) return 0;
+ for(q=of.samples,t=0;t<of.numins;t++,q++) {
+ STXSAMPLE s;
+
+ /* seek to instrument position */
+ _mm_fseek(modreader,((long)paraptr[t])<<4,SEEK_SET);
+ /* and load sample info */
+ s.type =_mm_read_UBYTE(modreader);
+ _mm_read_string(s.filename,12,modreader);
+ s.memsegh =_mm_read_UBYTE(modreader);
+ s.memsegl =_mm_read_I_UWORD(modreader);
+ s.length =_mm_read_I_ULONG(modreader);
+ s.loopbeg =_mm_read_I_ULONG(modreader);
+ s.loopend =_mm_read_I_ULONG(modreader);
+ s.volume =_mm_read_UBYTE(modreader);
+ s.dsk =_mm_read_UBYTE(modreader);
+ s.pack =_mm_read_UBYTE(modreader);
+ s.flags =_mm_read_UBYTE(modreader);
+ s.c2spd =_mm_read_I_ULONG(modreader);
+ _mm_read_UBYTES(s.unused,12,modreader);
+ _mm_read_string(s.sampname,28,modreader);
+ _mm_read_string(s.scrs,4,modreader);
+
+ if(_mm_eof(modreader)) {
+ _mm_errno = MMERR_LOADING_SAMPLEINFO;
+ return 0;
+ }
+
+ q->samplename = DupStr(s.sampname,28,1);
+ q->speed = (s.c2spd * 8363) / 8448;
+ q->length = s.length;
+ q->loopstart = s.loopbeg;
+ q->loopend = s.loopend;
+ q->volume = s.volume;
+ q->seekpos = (((long)s.memsegh)<<16|s.memsegl)<<4;
+ q->flags |= SF_SIGNED;
+
+ if(s.flags&1) q->flags |= SF_LOOP;
+ if(s.flags&4) q->flags |= SF_16BITS;
+ }
+
+ /* load pattern info */
+ of.numtrk=of.numpat*of.numchn;
+ if(!AllocTracks()) return 0;
+ if(!AllocPatterns()) return 0;
+
+ for(t=0;t<of.numpat;t++) {
+ /* seek to pattern position (+2 skip pattern length) */
+ _mm_fseek(modreader,(((long)paraptr[of.numins+t])<<4)+
+ (version==0x10?2:0),SEEK_SET);
+ if(!STX_ReadPattern()) return 0;
+ for(u=0;u<of.numchn;u++)
+ if(!(of.tracks[track++]=STX_ConvertTrack(&stxbuf[u*64]))) return 0;
+ }
+
+ return 1;
+}
+
+static CHAR *STX_LoadTitle(void)
+{
+ CHAR s[28];
+
+ _mm_fseek(modreader,0,SEEK_SET);
+ if(!_mm_read_UBYTES(s,20,modreader)) return NULL;
+
+ return(DupStr(s,28,1));
+}
+
+/*========== Loader information */
+
+MIKMODAPI MLOADER load_stx={
+ NULL,
+ "STX",
+ "STX (Scream Tracker Music Interface Kit)",
+ STX_Init,
+ STX_Test,
+ STX_Load,
+ STX_Cleanup,
+ STX_LoadTitle
+};
+
+/* ex:set ts=4: */
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