forked from len0rd/rockbox
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
This commit is contained in:
Frank Gevaerts
parent
d192bdf11e
commit
26f2bfde03
47 changed files with 22320 additions and 1 deletions
439
apps/plugins/mikmod/load_stx.c
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439
apps/plugins/mikmod/load_stx.c
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@ -0,0 +1,439 @@
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/* MikMod sound library
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(c) 1998, 1999, 2000, 2001, 2002 Miodrag Vallat and others - see file
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AUTHORS for complete list.
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This library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA.
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*/
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/*==============================================================================
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$Id: load_stx.c,v 1.3 2005/04/07 19:57:38 realtech Exp $
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STMIK 0.2 (STX) module loader
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==============================================================================*/
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/*
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Written by Claudio Matsuoka <claudio@helllabs.org>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <stdio.h>
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#ifdef HAVE_MEMORY_H
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#include <memory.h>
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#endif
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#include <string.h>
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#include "mikmod_internals.h"
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#ifdef SUNOS
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extern int fprintf(FILE *, const char *, ...);
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#endif
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/*========== Module structure */
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/* header */
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typedef struct STXHEADER {
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CHAR songname[20];
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CHAR trackername[8];
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UWORD patsize;
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UWORD unknown1;
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UWORD patptr;
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UWORD insptr;
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UWORD chnptr; /* not sure */
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UWORD unknown2;
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UWORD unknown3;
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UBYTE mastermult;
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UBYTE initspeed;
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UWORD unknown4;
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UWORD unknown5;
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UWORD patnum;
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UWORD insnum;
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UWORD ordnum;
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UWORD unknown6;
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UWORD unknown7;
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UWORD unknown8;
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CHAR scrm[4];
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} STXHEADER;
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/* sample information */
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typedef struct STXSAMPLE {
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UBYTE type;
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CHAR filename[12];
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UBYTE memsegh;
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UWORD memsegl;
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ULONG length;
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ULONG loopbeg;
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ULONG loopend;
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UBYTE volume;
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UBYTE dsk;
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UBYTE pack;
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UBYTE flags;
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ULONG c2spd;
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UBYTE unused[12];
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CHAR sampname[28];
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CHAR scrs[4];
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} STXSAMPLE;
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typedef struct STXNOTE {
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UBYTE note,ins,vol,cmd,inf;
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} STXNOTE;
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/*========== Loader variables */
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static STXNOTE *stxbuf = NULL; /* pointer to a complete STX pattern */
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static STXHEADER *mh = NULL;
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static UWORD *paraptr = NULL; /* parapointer array (see STX docs) */
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/*========== Loader code */
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static int STX_Test(void)
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{
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UBYTE id[8];
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int t;
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_mm_fseek(modreader,0x3C,SEEK_SET);
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if(!_mm_read_UBYTES(id,4,modreader)) return 0;
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if(memcmp(id,"SCRM",4)) return 0;
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_mm_fseek(modreader,0x14,SEEK_SET);
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if(!_mm_read_UBYTES(id,8,modreader)) return 0;
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for(t=0;t<STM_NTRACKERS;t++)
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if(!memcmp(id,STM_Signatures[t],8)) return 1;
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return 0;
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}
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static int STX_Init(void)
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{
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if(!(stxbuf=(STXNOTE*)MikMod_malloc(4*64*sizeof(STXNOTE)))) return 0;
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if(!(mh=(STXHEADER*)MikMod_malloc(sizeof(STXHEADER)))) return 0;
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if(!(poslookup=(UBYTE*)MikMod_malloc(sizeof(UBYTE)*256))) return 0;
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memset(poslookup,-1,256);
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return 1;
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}
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static void STX_Cleanup(void)
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{
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MikMod_free(stxbuf);
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MikMod_free(paraptr);
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MikMod_free(poslookup);
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MikMod_free(mh);
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}
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static int STX_ReadPattern(void)
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{
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int row=0,flag,ch;
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STXNOTE *n,dummy;
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/* clear pattern data */
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memset(stxbuf,255,4*64*sizeof(STXNOTE));
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while(row<64) {
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flag=_mm_read_UBYTE(modreader);
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if(_mm_eof(modreader)) {
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_mm_errno = MMERR_LOADING_PATTERN;
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return 0;
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}
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if(flag) {
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ch=flag&31;
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if((ch>=0)&&(ch<4))
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n=&stxbuf[(64U*ch)+row];
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else
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n=&dummy;
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if(flag&32) {
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n->note=_mm_read_UBYTE(modreader);
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n->ins=_mm_read_UBYTE(modreader);
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}
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if(flag&64) {
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n->vol=_mm_read_UBYTE(modreader);
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if(n->vol>64) n->vol=64;
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}
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if(flag&128) {
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n->cmd=_mm_read_UBYTE(modreader);
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n->inf=_mm_read_UBYTE(modreader);
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}
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} else row++;
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}
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return 1;
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}
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static UBYTE* STX_ConvertTrack(STXNOTE* tr)
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{
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int t;
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UniReset();
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for(t=0;t<64;t++) {
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UBYTE note,ins,vol,cmd,inf;
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note=tr[t].note;
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ins=tr[t].ins;
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vol=tr[t].vol;
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cmd=tr[t].cmd;
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inf=tr[t].inf;
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if((ins)&&(ins!=255)) UniInstrument(ins-1);
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if((note)&&(note!=255)) {
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if(note==254) {
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UniPTEffect(0xc,0); /* note cut command */
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vol=255;
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} else UniNote(24+((note>>4)*OCTAVE)+(note&0xf)); /* normal note */
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}
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if(vol<255) UniPTEffect(0xc,vol);
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if(cmd<255) switch(cmd) {
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case 1: /* Axx set speed to xx */
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UniPTEffect(0xf,inf>>4);
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break;
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case 2: /* Bxx position jump */
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UniPTEffect(0xb,inf);
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break;
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case 3: /* Cxx patternbreak to row xx */
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UniPTEffect(0xd,(((inf&0xf0)>>4)*10)+(inf&0xf));
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break;
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case 4: /* Dxy volumeslide */
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UniEffect(UNI_S3MEFFECTD,inf);
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break;
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case 5: /* Exy toneslide down */
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UniEffect(UNI_S3MEFFECTE,inf);
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break;
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case 6: /* Fxy toneslide up */
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UniEffect(UNI_S3MEFFECTF,inf);
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break;
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case 7: /* Gxx Tone portamento,speed xx */
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UniPTEffect(0x3,inf);
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break;
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case 8: /* Hxy vibrato */
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UniPTEffect(0x4,inf);
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break;
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case 9: /* Ixy tremor, ontime x, offtime y */
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UniEffect(UNI_S3MEFFECTI,inf);
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break;
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case 0: /* protracker arpeggio */
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if(!inf) break;
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/* fall through */
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case 0xa: /* Jxy arpeggio */
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UniPTEffect(0x0,inf);
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break;
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case 0xb: /* Kxy Dual command H00 & Dxy */
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UniPTEffect(0x4,0);
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UniEffect(UNI_S3MEFFECTD,inf);
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break;
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case 0xc: /* Lxy Dual command G00 & Dxy */
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UniPTEffect(0x3,0);
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UniEffect(UNI_S3MEFFECTD,inf);
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break;
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/* Support all these above, since ST2 can LOAD these values but can
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actually only play up to J - and J is only half-way implemented
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in ST2 */
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case 0x18: /* Xxx amiga panning command 8xx */
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UniPTEffect(0x8,inf);
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of.flags |= UF_PANNING;
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break;
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}
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UniNewline();
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}
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return UniDup();
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}
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static int STX_Load(int curious)
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{
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int t,u,track = 0;
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int version = 0;
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SAMPLE *q;
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/* try to read module header */
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_mm_read_string(mh->songname,20,modreader);
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_mm_read_string(mh->trackername,8,modreader);
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mh->patsize =_mm_read_I_UWORD(modreader);
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mh->unknown1 =_mm_read_I_UWORD(modreader);
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mh->patptr =_mm_read_I_UWORD(modreader);
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mh->insptr =_mm_read_I_UWORD(modreader);
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mh->chnptr =_mm_read_I_UWORD(modreader);
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mh->unknown2 =_mm_read_I_UWORD(modreader);
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mh->unknown3 =_mm_read_I_UWORD(modreader);
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mh->mastermult =_mm_read_UBYTE(modreader);
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mh->initspeed =_mm_read_UBYTE(modreader)>>4;
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mh->unknown4 =_mm_read_I_UWORD(modreader);
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mh->unknown5 =_mm_read_I_UWORD(modreader);
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mh->patnum =_mm_read_I_UWORD(modreader);
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mh->insnum =_mm_read_I_UWORD(modreader);
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mh->ordnum =_mm_read_I_UWORD(modreader);
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mh->unknown6 =_mm_read_I_UWORD(modreader);
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mh->unknown7 =_mm_read_I_UWORD(modreader);
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mh->unknown8 =_mm_read_I_UWORD(modreader);
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_mm_read_string(mh->scrm,4,modreader);
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if(_mm_eof(modreader)) {
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_mm_errno = MMERR_LOADING_HEADER;
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return 0;
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}
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/* set module variables */
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of.songname = DupStr(mh->songname,20,1);
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of.numpat = mh->patnum;
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of.reppos = 0;
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of.numins = of.numsmp = mh->insnum;
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of.initspeed = mh->initspeed;
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of.inittempo = 125;
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of.numchn = 4;
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of.flags |= UF_S3MSLIDES;
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of.bpmlimit = 32;
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if(!(paraptr=(UWORD*)MikMod_malloc((of.numins+of.numpat)*sizeof(UWORD))))
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return 0;
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/* read the instrument+pattern parapointers */
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_mm_fseek(modreader,mh->insptr<<4,SEEK_SET);
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_mm_read_I_UWORDS(paraptr,of.numins,modreader);
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_mm_fseek(modreader,mh->patptr<<4,SEEK_SET);
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_mm_read_I_UWORDS(paraptr+of.numins,of.numpat,modreader);
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/* check module version */
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_mm_fseek(modreader,paraptr[of.numins]<<4,SEEK_SET);
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version=_mm_read_I_UWORD(modreader);
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if(version==mh->patsize) {
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version = 0x10;
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of.modtype = StrDup("STMIK 0.2 (STM2STX 1.0)");
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} else {
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version = 0x11;
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of.modtype = StrDup("STMIK 0.2 (STM2STX 1.1)");
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}
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/* read the order data */
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_mm_fseek(modreader,(mh->chnptr<<4)+32,SEEK_SET);
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if(!AllocPositions(mh->ordnum)) return 0;
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for(t=0;t<mh->ordnum;t++) {
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of.positions[t]=_mm_read_UBYTE(modreader);
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_mm_fseek(modreader,4,SEEK_CUR);
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}
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of.numpos=0;poslookupcnt=mh->ordnum;
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for(t=0;t<mh->ordnum;t++) {
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int order=of.positions[t];
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if(order==255) order=LAST_PATTERN;
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of.positions[of.numpos]=order;
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poslookup[t]=of.numpos; /* bug fix for freaky S3Ms */
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if(of.positions[t]<254) of.numpos++;
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else
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/* special end of song pattern */
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if((order==LAST_PATTERN)&&(!curious)) break;
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}
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if(_mm_eof(modreader)) {
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_mm_errno = MMERR_LOADING_HEADER;
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return 0;
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}
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/* load samples */
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if(!AllocSamples()) return 0;
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for(q=of.samples,t=0;t<of.numins;t++,q++) {
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STXSAMPLE s;
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/* seek to instrument position */
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_mm_fseek(modreader,((long)paraptr[t])<<4,SEEK_SET);
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/* and load sample info */
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s.type =_mm_read_UBYTE(modreader);
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_mm_read_string(s.filename,12,modreader);
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s.memsegh =_mm_read_UBYTE(modreader);
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s.memsegl =_mm_read_I_UWORD(modreader);
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s.length =_mm_read_I_ULONG(modreader);
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s.loopbeg =_mm_read_I_ULONG(modreader);
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s.loopend =_mm_read_I_ULONG(modreader);
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s.volume =_mm_read_UBYTE(modreader);
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s.dsk =_mm_read_UBYTE(modreader);
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s.pack =_mm_read_UBYTE(modreader);
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s.flags =_mm_read_UBYTE(modreader);
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s.c2spd =_mm_read_I_ULONG(modreader);
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_mm_read_UBYTES(s.unused,12,modreader);
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_mm_read_string(s.sampname,28,modreader);
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_mm_read_string(s.scrs,4,modreader);
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if(_mm_eof(modreader)) {
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_mm_errno = MMERR_LOADING_SAMPLEINFO;
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return 0;
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}
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q->samplename = DupStr(s.sampname,28,1);
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q->speed = (s.c2spd * 8363) / 8448;
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q->length = s.length;
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q->loopstart = s.loopbeg;
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q->loopend = s.loopend;
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q->volume = s.volume;
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q->seekpos = (((long)s.memsegh)<<16|s.memsegl)<<4;
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q->flags |= SF_SIGNED;
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if(s.flags&1) q->flags |= SF_LOOP;
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if(s.flags&4) q->flags |= SF_16BITS;
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}
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/* load pattern info */
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of.numtrk=of.numpat*of.numchn;
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if(!AllocTracks()) return 0;
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if(!AllocPatterns()) return 0;
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for(t=0;t<of.numpat;t++) {
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/* seek to pattern position (+2 skip pattern length) */
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_mm_fseek(modreader,(((long)paraptr[of.numins+t])<<4)+
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(version==0x10?2:0),SEEK_SET);
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if(!STX_ReadPattern()) return 0;
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for(u=0;u<of.numchn;u++)
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if(!(of.tracks[track++]=STX_ConvertTrack(&stxbuf[u*64]))) return 0;
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}
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return 1;
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}
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static CHAR *STX_LoadTitle(void)
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{
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CHAR s[28];
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_mm_fseek(modreader,0,SEEK_SET);
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if(!_mm_read_UBYTES(s,20,modreader)) return NULL;
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return(DupStr(s,28,1));
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}
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/*========== Loader information */
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MIKMODAPI MLOADER load_stx={
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NULL,
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"STX",
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"STX (Scream Tracker Music Interface Kit)",
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STX_Init,
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STX_Test,
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STX_Load,
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STX_Cleanup,
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STX_LoadTitle
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};
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/* ex:set ts=4: */
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