1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
|
/* 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_mtm.c,v 1.3 2005/04/07 19:57:38 realtech Exp $
MTM 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 MTMHEADER {
UBYTE id[3]; /* MTM file marker */
UBYTE version; /* upper major, lower nibble minor version number */
CHAR songname[20]; /* ASCIIZ songname */
UWORD numtracks; /* number of tracks saved */
UBYTE lastpattern; /* last pattern number saved */
UBYTE lastorder; /* last order number to play (songlength-1) */
UWORD commentsize; /* length of comment field */
UBYTE numsamples; /* number of samples saved */
UBYTE attribute; /* attribute byte (unused) */
UBYTE beatspertrack;
UBYTE numchannels; /* number of channels used */
UBYTE panpos[32]; /* voice pan positions */
} MTMHEADER;
typedef struct MTMSAMPLE {
CHAR samplename[22];
ULONG length;
ULONG reppos;
ULONG repend;
UBYTE finetune;
UBYTE volume;
UBYTE attribute;
} MTMSAMPLE;
typedef struct MTMNOTE {
UBYTE a,b,c;
} MTMNOTE;
/*========== Loader variables */
static MTMHEADER *mh = NULL;
static MTMNOTE *mtmtrk = NULL;
static UWORD pat[32];
static CHAR MTM_Version[] = "MTM";
/*========== Loader code */
static int MTM_Test(void)
{
UBYTE id[3];
if(!_mm_read_UBYTES(id,3,modreader)) return 0;
if(!memcmp(id,"MTM",3)) return 1;
return 0;
}
static int MTM_Init(void)
{
if(!(mtmtrk=(MTMNOTE*)MikMod_calloc(64,sizeof(MTMNOTE)))) return 0;
if(!(mh=(MTMHEADER*)MikMod_malloc(sizeof(MTMHEADER)))) return 0;
return 1;
}
static void MTM_Cleanup(void)
{
MikMod_free(mtmtrk);
MikMod_free(mh);
}
static UBYTE* MTM_Convert(void)
{
int t;
UBYTE a,b,inst,note,eff,dat;
UniReset();
for(t=0;t<64;t++) {
a=mtmtrk[t].a;
b=mtmtrk[t].b;
inst=((a&0x3)<<4)|(b>>4);
note=a>>2;
eff=b&0xf;
dat=mtmtrk[t].c;
if(inst) UniInstrument(inst-1);
if(note) UniNote(note+2*OCTAVE);
/* MTM bug workaround : when the effect is volslide, slide-up *always*
overrides slide-down. */
if(eff==0xa && (dat&0xf0)) dat&=0xf0;
/* Convert pattern jump from Dec to Hex */
if(eff==0xd)
dat=(((dat&0xf0)>>4)*10)+(dat&0xf);
UniPTEffect(eff,dat);
UniNewline();
}
return UniDup();
}
static int MTM_Load(int curious)
{
int t,u;
MTMSAMPLE s;
SAMPLE *q;
(void)curious;
/* try to read module header */
_mm_read_UBYTES(mh->id,3,modreader);
mh->version =_mm_read_UBYTE(modreader);
_mm_read_string(mh->songname,20,modreader);
mh->numtracks =_mm_read_I_UWORD(modreader);
mh->lastpattern =_mm_read_UBYTE(modreader);
mh->lastorder =_mm_read_UBYTE(modreader);
mh->commentsize =_mm_read_I_UWORD(modreader);
mh->numsamples =_mm_read_UBYTE(modreader);
mh->attribute =_mm_read_UBYTE(modreader);
mh->beatspertrack=_mm_read_UBYTE(modreader);
mh->numchannels =_mm_read_UBYTE(modreader);
_mm_read_UBYTES(mh->panpos,32,modreader);
if(_mm_eof(modreader)) {
_mm_errno = MMERR_LOADING_HEADER;
return 0;
}
/* set module variables */
of.initspeed = 6;
of.inittempo = 125;
of.modtype = StrDup(MTM_Version);
of.numchn = mh->numchannels;
of.numtrk = mh->numtracks+1; /* get number of channels */
of.songname = DupStr(mh->songname,20,1); /* make a cstr of songname */
of.numpos = mh->lastorder+1; /* copy the songlength */
of.numpat = mh->lastpattern+1;
of.reppos = 0;
of.flags |= UF_PANNING;
for(t=0;t<32;t++) of.panning[t]=mh->panpos[t]<< 4;
of.numins=of.numsmp=mh->numsamples;
if(!AllocSamples()) return 0;
q=of.samples;
for(t=0;t<of.numins;t++) {
/* try to read sample info */
_mm_read_string(s.samplename,22,modreader);
s.length =_mm_read_I_ULONG(modreader);
s.reppos =_mm_read_I_ULONG(modreader);
s.repend =_mm_read_I_ULONG(modreader);
s.finetune =_mm_read_UBYTE(modreader);
s.volume =_mm_read_UBYTE(modreader);
s.attribute =_mm_read_UBYTE(modreader);
if(_mm_eof(modreader)) {
_mm_errno = MMERR_LOADING_SAMPLEINFO;
return 0;
}
q->samplename = DupStr(s.samplename,22,1);
q->seekpos = 0;
q->speed = finetune[s.finetune];
q->length = s.length;
q->loopstart = s.reppos;
q->loopend = s.repend;
q->volume = s.volume;
if((s.repend-s.reppos)>2) q->flags |= SF_LOOP;
if(s.attribute&1) {
/* If the sample is 16-bits, convert the length and replen
byte-values into sample-values */
q->flags|=SF_16BITS;
q->length>>=1;
q->loopstart>>=1;
q->loopend>>=1;
}
q++;
}
if(!AllocPositions(of.numpos)) return 0;
for(t=0;t<of.numpos;t++)
of.positions[t]=_mm_read_UBYTE(modreader);
for(;t<128;t++) (void)_mm_read_UBYTE(modreader);
if(_mm_eof(modreader)) {
_mm_errno = MMERR_LOADING_HEADER;
return 0;
}
if(!AllocTracks()) return 0;
if(!AllocPatterns()) return 0;
of.tracks[0]=MTM_Convert(); /* track 0 is empty */
for(t=1;t<of.numtrk;t++) {
int s;
for(s=0;s<64;s++) {
mtmtrk[s].a=_mm_read_UBYTE(modreader);
mtmtrk[s].b=_mm_read_UBYTE(modreader);
mtmtrk[s].c=_mm_read_UBYTE(modreader);
}
if(_mm_eof(modreader)) {
_mm_errno = MMERR_LOADING_TRACK;
return 0;
}
if(!(of.tracks[t]=MTM_Convert())) return 0;
}
for(t=0;t<of.numpat;t++) {
_mm_read_I_UWORDS(pat,32,modreader);
for(u=0;u<of.numchn;u++)
of.patterns[((long)t*of.numchn)+u]=pat[u];
}
/* read comment field */
if(mh->commentsize)
if(!ReadLinedComment(mh->commentsize, 40)) return 0;
return 1;
}
static CHAR *MTM_LoadTitle(void)
{
CHAR s[20];
_mm_fseek(modreader,4,SEEK_SET);
if(!_mm_read_UBYTES(s,20,modreader)) return NULL;
return(DupStr(s,20,1));
}
/*========== Loader information */
MIKMODAPI MLOADER load_mtm={
NULL,
"MTM",
"MTM (MultiTracker Module editor)",
MTM_Init,
MTM_Test,
MTM_Load,
MTM_Cleanup,
MTM_LoadTitle
};
/* ex:set ts=4: */
|
