load_ult.c
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上传日期:2014-04-03
资源大小:7248k
文件大小:7k
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_ult.c,v 1.1.1.1 2004/01/21 01:36:35 raph Exp $
- Ultratracker (ULT) 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 */
- /* header */
- typedef struct ULTHEADER {
- CHAR id[16];
- CHAR songtitle[32];
- UBYTE reserved;
- } ULTHEADER;
- /* sample information */
- typedef struct ULTSAMPLE {
- CHAR samplename[32];
- CHAR dosname[12];
- SLONG loopstart;
- SLONG loopend;
- SLONG sizestart;
- SLONG sizeend;
- UBYTE volume;
- UBYTE flags;
- UWORD speed;
- SWORD finetune;
- } ULTSAMPLE;
- typedef struct ULTEVENT {
- UBYTE note,sample,eff,dat1,dat2;
- } ULTEVENT;
- /*========== Loader variables */
- #define ULTS_16BITS 4
- #define ULTS_LOOP 8
- #define ULTS_REVERSE 16
- #define ULT_VERSION_LEN 18
- static CHAR ULT_Version[ULT_VERSION_LEN]="Ultra Tracker v1.x";
- static ULTEVENT ev;
- /*========== Loader code */
- BOOL ULT_Test(void)
- {
- CHAR id[16];
- if(!_mm_read_string(id,15,modreader)) return 0;
- if(strncmp(id,"MAS_UTrack_V00",14)) return 0;
- if((id[14]<'1')||(id[14]>'4')) return 0;
- return 1;
- }
- BOOL ULT_Init(void)
- {
- return 1;
- }
- void ULT_Cleanup(void)
- {
- }
- static UBYTE ReadUltEvent(ULTEVENT* event)
- {
- UBYTE flag,rep=1;
- flag = _mm_read_UBYTE(modreader);
- if(flag==0xfc) {
- rep = _mm_read_UBYTE(modreader);
- event->note =_mm_read_UBYTE(modreader);
- } else
- event->note = flag;
- event->sample =_mm_read_UBYTE(modreader);
- event->eff =_mm_read_UBYTE(modreader);
- event->dat1 =_mm_read_UBYTE(modreader);
- event->dat2 =_mm_read_UBYTE(modreader);
- return rep;
- }
- BOOL ULT_Load(BOOL curious)
- {
- int t,u,tracks=0;
- SAMPLE *q;
- ULTSAMPLE s;
- ULTHEADER mh;
- UBYTE nos,noc,nop;
- /* try to read module header */
- _mm_read_string(mh.id,15,modreader);
- _mm_read_string(mh.songtitle,32,modreader);
- mh.reserved=_mm_read_UBYTE(modreader);
- if(_mm_eof(modreader)) {
- _mm_errno = MMERR_LOADING_HEADER;
- return 0;
- }
- ULT_Version[ULT_VERSION_LEN-1]='3'+(mh.id[14]-'1');
- of.modtype = DupStr(ULT_Version,ULT_VERSION_LEN,1);
- of.initspeed = 6;
- of.inittempo = 125;
- of.reppos = 0;
- /* read songtext */
- if ((mh.id[14]>'1')&&(mh.reserved))
- if(!ReadLinedComment(mh.reserved * 32, 32)) return 0;
- nos=_mm_read_UBYTE(modreader);
- if(_mm_eof(modreader)) {
- _mm_errno = MMERR_LOADING_HEADER;
- return 0;
- }
- of.songname=DupStr(mh.songtitle,32,1);
- of.numins=of.numsmp=nos;
- if(!AllocSamples()) return 0;
- q = of.samples;
- for(t=0;t<nos;t++) {
- /* try to read sample info */
- _mm_read_string(s.samplename,32,modreader);
- _mm_read_string(s.dosname,12,modreader);
- s.loopstart =_mm_read_I_ULONG(modreader);
- s.loopend =_mm_read_I_ULONG(modreader);
- s.sizestart =_mm_read_I_ULONG(modreader);
- s.sizeend =_mm_read_I_ULONG(modreader);
- s.volume =_mm_read_UBYTE(modreader);
- s.flags =_mm_read_UBYTE(modreader);
- s.speed =(mh.id[14]>='4')?_mm_read_I_UWORD(modreader):8363;
- s.finetune =_mm_read_I_SWORD(modreader);
- if(_mm_eof(modreader)) {
- _mm_errno = MMERR_LOADING_SAMPLEINFO;
- return 0;
- }
- q->samplename=DupStr(s.samplename,32,1);
- /* The correct formula for the coefficient would be
- pow(2,(double)s.finetume/OCTAVE/32768), but to avoid floating point
- here, we'll use a first order approximation here.
- 1/567290 == Ln(2)/OCTAVE/32768 */
- q->speed=s.speed+s.speed*(((SLONG)s.speed*(SLONG)s.finetune)/567290);
- q->length = s.sizeend-s.sizestart;
- q->volume = s.volume>>2;
- q->loopstart = s.loopstart;
- q->loopend = s.loopend;
- q->flags = SF_SIGNED;
- if(s.flags&ULTS_LOOP) q->flags|=SF_LOOP;
- if(s.flags&ULTS_16BITS) {
- s.sizeend+=(s.sizeend-s.sizestart);
- s.sizestart<<=1;
- q->flags|=SF_16BITS;
- q->loopstart>>=1;
- q->loopend>>=1;
- }
- q++;
- }
- if(!AllocPositions(256)) return 0;
- for(t=0;t<256;t++)
- of.positions[t]=_mm_read_UBYTE(modreader);
- for(t=0;t<256;t++)
- if(of.positions[t]==255) {
- of.positions[t]=LAST_PATTERN;
- break;
- }
- of.numpos=t;
- noc=_mm_read_UBYTE(modreader);
- nop=_mm_read_UBYTE(modreader);
- of.numchn=++noc;
- of.numpat=++nop;
- of.numtrk=of.numchn*of.numpat;
- if(!AllocTracks()) return 0;
- if(!AllocPatterns()) return 0;
- for(u=0;u<of.numchn;u++)
- for(t=0;t<of.numpat;t++)
- of.patterns[(t*of.numchn)+u]=tracks++;
- /* read pan position table for v1.5 and higher */
- if(mh.id[14]>='3') {
- for(t=0;t<of.numchn;t++) of.panning[t]=_mm_read_UBYTE(modreader)<<4;
- of.flags |= UF_PANNING;
- }
- for(t=0;t<of.numtrk;t++) {
- int rep,row=0;
- UniReset();
- while(row<64) {
- rep=ReadUltEvent(&ev);
- if(_mm_eof(modreader)) {
- _mm_errno = MMERR_LOADING_TRACK;
- return 0;
- }
- while(rep--) {
- UBYTE eff;
- int offset;
- if(ev.sample) UniInstrument(ev.sample-1);
- if(ev.note) UniNote(ev.note+2*OCTAVE-1);
- /* first effect - various fixes by Alexander Kerkhove and
- Thomas Neumann */
- eff = ev.eff>>4;
- switch(eff) {
- case 0x3: /* tone portamento */
- UniEffect(UNI_ITEFFECTG,ev.dat2);
- break;
- case 0x5:
- break;
- case 0x9: /* sample offset */
- offset=(ev.dat2<<8)|((ev.eff&0xf)==9?ev.dat1:0);
- UniEffect(UNI_ULTEFFECT9,offset);
- break;
- case 0xb: /* panning */
- UniPTEffect(8,ev.dat2*0xf);
- of.flags |= UF_PANNING;
- break;
- case 0xc: /* volume */
- UniPTEffect(eff,ev.dat2>>2);
- break;
- default:
- UniPTEffect(eff,ev.dat2);
- break;
- }
- /* second effect */
- eff=ev.eff&0xf;
- switch(eff) {
- case 0x3: /* tone portamento */
- UniEffect(UNI_ITEFFECTG,ev.dat1);
- break;
- case 0x5:
- break;
- case 0x9: /* sample offset */
- if((ev.eff>>4)!=9)
- UniEffect(UNI_ULTEFFECT9,((UWORD)ev.dat1)<<8);
- break;
- case 0xb: /* panning */
- UniPTEffect(8,ev.dat1*0xf);
- of.flags |= UF_PANNING;
- break;
- case 0xc: /* volume */
- UniPTEffect(eff,ev.dat1>>2);
- break;
- default:
- UniPTEffect(eff,ev.dat1);
- break;
- }
- UniNewline();
- row++;
- }
- }
- if(!(of.tracks[t]=UniDup())) return 0;
- }
- return 1;
- }
- CHAR *ULT_LoadTitle(void)
- {
- CHAR s[32];
- _mm_fseek(modreader,15,SEEK_SET);
- if(!_mm_read_UBYTES(s,32,modreader)) return NULL;
- return(DupStr(s,32,1));
- }
- /*========== Loader information */
- MIKMODAPI MLOADER load_ult={
- NULL,
- "ULT",
- "ULT (UltraTracker)",
- ULT_Init,
- ULT_Test,
- ULT_Load,
- ULT_Cleanup,
- ULT_LoadTitle
- };
- /* ex:set ts=4: */