load_amf.c
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上传日期:2014-04-03
资源大小:7248k
文件大小:14k
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_amf.c,v 1.1.1.1 2004/01/21 01:36:35 raph Exp $
- DMP Advanced Module Format 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 AMFHEADER {
- UBYTE id[3]; /* AMF file marker */
- UBYTE version; /* upper major, lower nibble minor version number */
- CHAR songname[32]; /* ASCIIZ songname */
- UBYTE numsamples; /* number of samples saved */
- UBYTE numorders;
- UWORD numtracks; /* number of tracks saved */
- UBYTE numchannels; /* number of channels used */
- SBYTE panpos[32]; /* voice pan positions */
- UBYTE songbpm;
- UBYTE songspd;
- } AMFHEADER;
- typedef struct AMFSAMPLE {
- UBYTE type;
- CHAR samplename[32];
- CHAR filename[13];
- ULONG offset;
- ULONG length;
- UWORD c2spd;
- UBYTE volume;
- ULONG reppos;
- ULONG repend;
- } AMFSAMPLE;
- typedef struct AMFNOTE {
- UBYTE note,instr,volume,fxcnt;
- UBYTE effect[3];
- SBYTE parameter[3];
- } AMFNOTE;
- /*========== Loader variables */
- static AMFHEADER *mh = NULL;
- #define AMFTEXTLEN 22
- static CHAR AMF_Version[AMFTEXTLEN+1] = "DSMI Module Format 0.0";
- static AMFNOTE *track = NULL;
- /*========== Loader code */
- BOOL AMF_Test(void)
- {
- UBYTE id[3],ver;
- if(!_mm_read_UBYTES(id,3,modreader)) return 0;
- if(memcmp(id,"AMF",3)) return 0;
- ver=_mm_read_UBYTE(modreader);
- if((ver>=10)&&(ver<=14)) return 1;
- return 0;
- }
- BOOL AMF_Init(void)
- {
- if(!(mh=(AMFHEADER*)_mm_malloc(sizeof(AMFHEADER)))) return 0;
- if(!(track=(AMFNOTE*)_mm_calloc(64,sizeof(AMFNOTE)))) return 0;
- return 1;
- }
- void AMF_Cleanup(void)
- {
- _mm_free(mh);
- _mm_free(track);
- }
- static BOOL AMF_UnpackTrack(MREADER* modreader)
- {
- ULONG tracksize;
- UBYTE row,cmd;
- SBYTE arg;
- /* empty track */
- memset(track,0,64*sizeof(AMFNOTE));
- /* read packed track */
- if (modreader) {
- tracksize=_mm_read_I_UWORD(modreader);
- tracksize+=((ULONG)_mm_read_UBYTE(modreader))<<16;
- if (tracksize)
- while(tracksize--) {
- row=_mm_read_UBYTE(modreader);
- cmd=_mm_read_UBYTE(modreader);
- arg=_mm_read_SBYTE(modreader);
- /* unexpected end of track */
- if(!tracksize) {
- if((row==0xff)&&(cmd==0xff)&&(arg==-1))
- break;
- /* the last triplet should be FF FF FF, but this is not
- always the case... maybe a bug in m2amf ?
- else
- return 0;
- */
- }
- /* invalid row (probably unexpected end of row) */
- if (row>=64)
- return 0;
- if (cmd<0x7f) {
- /* note, vol */
- track[row].note=cmd;
- track[row].volume=(UBYTE)arg+1;
- } else
- if (cmd==0x7f) {
- /* duplicate row */
- if ((arg<0)&&(row+arg>=0)) {
- memcpy(track+row,track+(row+arg),sizeof(AMFNOTE));
- }
- } else
- if (cmd==0x80) {
- /* instr */
- track[row].instr=arg+1;
- } else
- if (cmd==0x83) {
- /* volume without note */
- track[row].volume=(UBYTE)arg+1;
- } else
- if (cmd==0xff) {
- /* apparently, some M2AMF version fail to estimate the
- size of the compressed patterns correctly, and end
- up with blanks, i.e. dead triplets. Those are marked
- with cmd == 0xff. Let's ignore them. */
- } else
- if(track[row].fxcnt<3) {
- /* effect, param */
- if(cmd>0x97)
- return 0;
- track[row].effect[track[row].fxcnt]=cmd&0x7f;
- track[row].parameter[track[row].fxcnt]=arg;
- track[row].fxcnt++;
- } else
- return 0;
- }
- }
- return 1;
- }
- static UBYTE* AMF_ConvertTrack(void)
- {
- int row,fx4memory=0;
- /* convert track */
- UniReset();
- for (row=0;row<64;row++) {
- if (track[row].instr) UniInstrument(track[row].instr-1);
- if (track[row].note>OCTAVE) UniNote(track[row].note-OCTAVE);
- /* AMF effects */
- while(track[row].fxcnt--) {
- SBYTE inf=track[row].parameter[track[row].fxcnt];
- switch(track[row].effect[track[row].fxcnt]) {
- case 1: /* Set speed */
- UniEffect(UNI_S3MEFFECTA,inf);
- break;
- case 2: /* Volume slide */
- if(inf) {
- UniWriteByte(UNI_S3MEFFECTD);
- if (inf>=0)
- UniWriteByte((inf&0xf)<<4);
- else
- UniWriteByte((-inf)&0xf);
- }
- break;
- /* effect 3, set channel volume, done in UnpackTrack */
- case 4: /* Porta up/down */
- if(inf) {
- if(inf>0) {
- UniEffect(UNI_S3MEFFECTE,inf);
- fx4memory=UNI_S3MEFFECTE;
- } else {
- UniEffect(UNI_S3MEFFECTF,-inf);
- fx4memory=UNI_S3MEFFECTF;
- }
- } else if(fx4memory)
- UniEffect(fx4memory,0);
- break;
- /* effect 5, "Porta abs", not supported */
- case 6: /* Porta to note */
- UniEffect(UNI_ITEFFECTG,inf);
- break;
- case 7: /* Tremor */
- UniEffect(UNI_S3MEFFECTI,inf);
- break;
- case 8: /* Arpeggio */
- UniPTEffect(0x0,inf);
- break;
- case 9: /* Vibrato */
- UniPTEffect(0x4,inf);
- break;
- case 0xa: /* Porta + Volume slide */
- UniPTEffect(0x3,0);
- if(inf) {
- UniWriteByte(UNI_S3MEFFECTD);
- if (inf>=0)
- UniWriteByte((inf&0xf)<<4);
- else
- UniWriteByte((-inf)&0xf);
- }
- break;
- case 0xb: /* Vibrato + Volume slide */
- UniPTEffect(0x4,0);
- if(inf) {
- UniWriteByte(UNI_S3MEFFECTD);
- if (inf>=0)
- UniWriteByte((inf&0xf)<<4);
- else
- UniWriteByte((-inf)&0xf);
- }
- break;
- case 0xc: /* Pattern break (in hex) */
- UniPTEffect(0xd,inf);
- break;
- case 0xd: /* Pattern jump */
- UniPTEffect(0xb,inf);
- break;
- /* effect 0xe, "Sync", not supported */
- case 0xf: /* Retrig */
- UniEffect(UNI_S3MEFFECTQ,inf&0xf);
- break;
- case 0x10: /* Sample offset */
- UniPTEffect(0x9,inf);
- break;
- case 0x11: /* Fine volume slide */
- if(inf) {
- UniWriteByte(UNI_S3MEFFECTD);
- if (inf>=0)
- UniWriteByte((inf&0xf)<<4|0xf);
- else
- UniWriteByte(0xf0|((-inf)&0xf));
- }
- break;
- case 0x12: /* Fine portamento */
- if(inf) {
- if(inf>0) {
- UniEffect(UNI_S3MEFFECTE,0xf0|(inf&0xf));
- fx4memory=UNI_S3MEFFECTE;
- } else {
- UniEffect(UNI_S3MEFFECTF,0xf0|((-inf)&0xf));
- fx4memory=UNI_S3MEFFECTF;
- }
- } else if(fx4memory)
- UniEffect(fx4memory,0);
- break;
- case 0x13: /* Delay note */
- UniPTEffect(0xe,0xd0|(inf&0xf));
- break;
- case 0x14: /* Note cut */
- UniPTEffect(0xc,0);
- track[row].volume=0;
- break;
- case 0x15: /* Set tempo */
- UniEffect(UNI_S3MEFFECTT,inf);
- break;
- case 0x16: /* Extra fine portamento */
- if(inf) {
- if(inf>0) {
- UniEffect(UNI_S3MEFFECTE,0xe0|((inf>>2)&0xf));
- fx4memory=UNI_S3MEFFECTE;
- } else {
- UniEffect(UNI_S3MEFFECTF,0xe0|(((-inf)>>2)&0xf));
- fx4memory=UNI_S3MEFFECTF;
- }
- } else if(fx4memory)
- UniEffect(fx4memory,0);
- break;
- case 0x17: /* Panning */
- if (inf>64)
- UniEffect(UNI_ITEFFECTS0,0x91); /* surround */
- else
- UniPTEffect(0x8,(inf==64)?255:(inf+64)<<1);
- of.flags |= UF_PANNING;
- break;
- }
- }
- if (track[row].volume) UniVolEffect(VOL_VOLUME,track[row].volume-1);
- UniNewline();
- }
- return UniDup();
- }
- BOOL AMF_Load(BOOL curious)
- {
- int t,u,realtrackcnt,realsmpcnt,defaultpanning;
- AMFSAMPLE s;
- SAMPLE *q;
- UWORD *track_remap;
- ULONG samplepos;
- int channel_remap[16];
- /* try to read module header */
- _mm_read_UBYTES(mh->id,3,modreader);
- mh->version =_mm_read_UBYTE(modreader);
- _mm_read_string(mh->songname,32,modreader);
- mh->numsamples =_mm_read_UBYTE(modreader);
- mh->numorders =_mm_read_UBYTE(modreader);
- mh->numtracks =_mm_read_I_UWORD(modreader);
- mh->numchannels =_mm_read_UBYTE(modreader);
- if((!mh->numchannels)||(mh->numchannels>(mh->version>=12?32:16))) {
- _mm_errno=MMERR_NOT_A_MODULE;
- return 0;
- }
- if(mh->version>=11) {
- memset(mh->panpos,0,32);
- _mm_read_SBYTES(mh->panpos,(mh->version>=13)?32:16,modreader);
- } else
- _mm_read_UBYTES(channel_remap,16,modreader);
- if (mh->version>=13) {
- mh->songbpm=_mm_read_UBYTE(modreader);
- if(mh->songbpm<32) {
- _mm_errno=MMERR_NOT_A_MODULE;
- return 0;
- }
- mh->songspd=_mm_read_UBYTE(modreader);
- if(mh->songspd>32) {
- _mm_errno=MMERR_NOT_A_MODULE;
- return 0;
- }
- } else {
- mh->songbpm=125;
- mh->songspd=6;
- }
- if(_mm_eof(modreader)) {
- _mm_errno = MMERR_LOADING_HEADER;
- return 0;
- }
- /* set module variables */
- of.initspeed = mh->songspd;
- of.inittempo = mh->songbpm;
- AMF_Version[AMFTEXTLEN-3]='0'+(mh->version/10);
- AMF_Version[AMFTEXTLEN-1]='0'+(mh->version%10);
- of.modtype = strdup(AMF_Version);
- of.numchn = mh->numchannels;
- of.numtrk = mh->numorders*mh->numchannels;
- if (mh->numtracks>of.numtrk)
- of.numtrk=mh->numtracks;
- of.numtrk++; /* add room for extra, empty track */
- of.songname = DupStr(mh->songname,32,1);
- of.numpos = mh->numorders;
- of.numpat = mh->numorders;
- of.reppos = 0;
- of.flags |= UF_S3MSLIDES;
- /* XXX whenever possible, we should try to determine the original format.
- Here we assume it was S3M-style wrt bpmlimit... */
- of.bpmlimit = 32;
- /*
- * Play with the panning table. Although the AMF format embeds a
- * panning table, if the module was a MOD or an S3M with default
- * panning and didn't use any panning commands, don't flag
- * UF_PANNING, to use our preferred panning table for this case.
- */
- defaultpanning = 1;
- for (t = 0; t < 32; t++) {
- if (mh->panpos[t] > 64) {
- of.panning[t] = PAN_SURROUND;
- defaultpanning = 0;
- } else
- if (mh->panpos[t] == 64)
- of.panning[t] = PAN_RIGHT;
- else
- of.panning[t] = (mh->panpos[t] + 64) << 1;
- }
- if (defaultpanning) {
- for (t = 0; t < of.numchn; t++)
- if (of.panning[t] == (((t + 1) & 2) ? PAN_RIGHT : PAN_LEFT)) {
- defaultpanning = 0; /* not MOD canonical panning */
- break;
- }
- }
- if (defaultpanning)
- of.flags |= UF_PANNING;
- of.numins=of.numsmp=mh->numsamples;
- if(!AllocPositions(of.numpos)) return 0;
- for(t=0;t<of.numpos;t++)
- of.positions[t]=t;
- if(!AllocTracks()) return 0;
- if(!AllocPatterns()) return 0;
- /* read AMF order table */
- for (t=0;t<of.numpat;t++) {
- if (mh->version>=14)
- /* track size */
- of.pattrows[t]=_mm_read_I_UWORD(modreader);
- if (mh->version>=10)
- _mm_read_I_UWORDS(of.patterns+(t*of.numchn),of.numchn,modreader);
- else
- for(u=0;u<of.numchn;u++)
- of.patterns[t*of.numchn+channel_remap[u]]=_mm_read_I_UWORD(modreader);
- }
- if(_mm_eof(modreader)) {
- _mm_errno = MMERR_LOADING_HEADER;
- return 0;
- }
- /* read sample information */
- if(!AllocSamples()) return 0;
- q=of.samples;
- for(t=0;t<of.numins;t++) {
- /* try to read sample info */
- s.type=_mm_read_UBYTE(modreader);
- _mm_read_string(s.samplename,32,modreader);
- _mm_read_string(s.filename,13,modreader);
- s.offset =_mm_read_I_ULONG(modreader);
- s.length =_mm_read_I_ULONG(modreader);
- s.c2spd =_mm_read_I_UWORD(modreader);
- if(s.c2spd==8368) s.c2spd=8363;
- s.volume =_mm_read_UBYTE(modreader);
- if(mh->version>=11) {
- s.reppos =_mm_read_I_ULONG(modreader);
- s.repend =_mm_read_I_ULONG(modreader);
- } else {
- s.reppos =_mm_read_I_UWORD(modreader);
- s.repend =s.length;
- }
- if(_mm_eof(modreader)) {
- _mm_errno = MMERR_LOADING_SAMPLEINFO;
- return 0;
- }
- q->samplename = DupStr(s.samplename,32,1);
- q->speed = s.c2spd;
- q->volume = s.volume;
- if (s.type) {
- q->seekpos = s.offset;
- q->length = s.length;
- q->loopstart = s.reppos;
- q->loopend = s.repend;
- if((s.repend-s.reppos)>2) q->flags |= SF_LOOP;
- }
- q++;
- }
- /* read track table */
- if(!(track_remap=_mm_calloc(mh->numtracks+1,sizeof(UWORD))))
- return 0;
- _mm_read_I_UWORDS(track_remap+1,mh->numtracks,modreader);
- if(_mm_eof(modreader)) {
- free(track_remap);
- _mm_errno=MMERR_LOADING_TRACK;
- return 0;
- }
- for(realtrackcnt=t=0;t<=mh->numtracks;t++)
- if (realtrackcnt<track_remap[t])
- realtrackcnt=track_remap[t];
- for(t=0;t<of.numpat*of.numchn;t++)
- of.patterns[t]=(of.patterns[t]<=mh->numtracks)?
- track_remap[of.patterns[t]]-1:realtrackcnt;
- free(track_remap);
- /* unpack tracks */
- for(t=0;t<realtrackcnt;t++) {
- if(_mm_eof(modreader)) {
- _mm_errno = MMERR_LOADING_TRACK;
- return 0;
- }
- if (!AMF_UnpackTrack(modreader)) {
- _mm_errno = MMERR_LOADING_TRACK;
- return 0;
- }
- if(!(of.tracks[t]=AMF_ConvertTrack()))
- return 0;
- }
- /* add an extra void track */
- UniReset();
- for(t=0;t<64;t++) UniNewline();
- of.tracks[realtrackcnt++]=UniDup();
- for(t=realtrackcnt;t<of.numtrk;t++) of.tracks[t]=NULL;
- /* compute sample offsets */
- samplepos=_mm_ftell(modreader);
- for(realsmpcnt=t=0;t<of.numsmp;t++)
- if(realsmpcnt<of.samples[t].seekpos)
- realsmpcnt=of.samples[t].seekpos;
- for(t=1;t<=realsmpcnt;t++) {
- q=of.samples;
- while(q->seekpos!=t) q++;
- q->seekpos=samplepos;
- samplepos+=q->length;
- }
- return 1;
- }
- CHAR *AMF_LoadTitle(void)
- {
- CHAR s[32];
- _mm_fseek(modreader,4,SEEK_SET);
- if(!_mm_read_UBYTES(s,32,modreader)) return NULL;
- return(DupStr(s,32,1));
- }
- /*========== Loader information */
- MIKMODAPI MLOADER load_amf={
- NULL,
- "AMF",
- "AMF (DSMI Advanced Module Format)",
- AMF_Init,
- AMF_Test,
- AMF_Load,
- AMF_Cleanup,
- AMF_LoadTitle
- };
- /* ex:set ts=4: */