forked from native-toolkit/libmodplug
-
Notifications
You must be signed in to change notification settings - Fork 0
/
load_psm.cpp
866 lines (829 loc) · 28.2 KB
/
load_psm.cpp
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
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
/*
* This source code is public domain.
*
* Authors: Olivier Lapicque <[email protected]>
*/
///////////////////////////////////////////////////
//
// PSM module loader
//
///////////////////////////////////////////////////
#include "stdafx.h"
#include "sndfile.h"
//#define PSM_LOG
#define PSM_ID_NEW 0x204d5350
#define PSM_ID_OLD 0xfe4d5350
#define IFFID_FILE 0x454c4946
#define IFFID_TITL 0x4c544954
#define IFFID_SDFT 0x54464453
#define IFFID_PBOD 0x444f4250
#define IFFID_SONG 0x474e4f53
#define IFFID_PATT 0x54544150
#define IFFID_DSMP 0x504d5344
#define IFFID_OPLH 0x484c504f
#pragma pack(1)
typedef struct _PSMCHUNK
{
DWORD id;
DWORD len;
DWORD listid;
} PSMCHUNK;
void swap_PSMCHUNK(PSMCHUNK* p){
p->id = bswapLE32(p->id);
p->len = bswapLE32(p->len);
p->listid = bswapLE32(p->listid);
}
typedef struct _PSMSONGHDR
{
CHAR songname[8]; // "MAINSONG"
BYTE reserved1;
BYTE reserved2;
BYTE channels;
} PSMSONGHDR;
typedef struct _PSMPATTERN
{
DWORD size;
DWORD name;
WORD rows;
WORD reserved1;
BYTE data[4];
} PSMPATTERN;
void swap_PSMPATTERN(PSMPATTERN* p){
p->size = bswapLE32(p->size);
p->name = bswapLE32(p->name);
p->rows = bswapLE16(p->rows);
}
typedef struct _PSMSAMPLE
{
BYTE flags;
CHAR songname[8];
DWORD smpid;
CHAR samplename[34];
DWORD reserved1;
BYTE reserved2;
BYTE insno;
BYTE reserved3;
DWORD length;
DWORD loopstart;
DWORD loopend;
WORD reserved4;
BYTE defvol;
DWORD reserved5;
DWORD samplerate;
BYTE reserved6[19];
} PSMSAMPLE;
void swap_PSMSAMPLE(PSMSAMPLE* p){
p->smpid = bswapLE32(p->smpid);
p->length = bswapLE32(p->length);
p->loopstart = bswapLE32(p->loopstart);
p->loopend = bswapLE32(p->loopend);
p->samplerate = bswapLE32(p->samplerate);
}
#pragma pack()
BOOL CSoundFile::ReadPSM(LPCBYTE lpStream, DWORD dwMemLength)
//-----------------------------------------------------------
{
PSMCHUNK *pfh = (PSMCHUNK *)lpStream;
DWORD dwMemPos, dwSongPos;
DWORD smpnames[MAX_SAMPLES];
DWORD patptrs[MAX_PATTERNS];
BYTE samplemap[MAX_SAMPLES];
UINT nPatterns;
// Swap chunk
swap_PSMCHUNK(pfh);
// Chunk0: "PSM ",filesize,"FILE"
if (dwMemLength < 256) return FALSE;
if (pfh->id == PSM_ID_OLD)
{
#ifdef PSM_LOG
Log("Old PSM format not supported\n");
#endif
return FALSE;
}
if ((pfh->id != PSM_ID_NEW) || (pfh->len+12 > dwMemLength) || (pfh->listid != IFFID_FILE)) return FALSE;
m_nType = MOD_TYPE_PSM;
m_nChannels = 16;
m_nSamples = 0;
nPatterns = 0;
dwMemPos = 12;
dwSongPos = 0;
for (UINT iChPan=0; iChPan<16; iChPan++)
{
UINT pan = (((iChPan & 3) == 1) || ((iChPan&3)==2)) ? 0xC0 : 0x40;
ChnSettings[iChPan].nPan = pan;
}
while (dwMemPos+8 < dwMemLength)
{
PSMCHUNK *pchunk = (PSMCHUNK *)(lpStream+dwMemPos);
swap_PSMCHUNK(pchunk);
if ((pchunk->len >= dwMemLength - 8) || (dwMemPos + pchunk->len + 8 > dwMemLength)) break;
dwMemPos += 8;
PUCHAR pdata = (PUCHAR)(lpStream+dwMemPos);
ULONG len = pchunk->len;
if (len) switch(pchunk->id)
{
// "TITL": Song title
case IFFID_TITL:
if (!pdata[0]) { pdata++; len--; }
memcpy(m_szNames[0], pdata, (len>31) ? 31 : len);
m_szNames[0][31] = 0;
break;
// "PBOD": Pattern
case IFFID_PBOD:
if ((len >= 12) && (nPatterns < MAX_PATTERNS))
{
patptrs[nPatterns++] = dwMemPos-8;
}
break;
// "SONG": Song description
case IFFID_SONG:
if ((len >= sizeof(PSMSONGHDR)+8) && (!dwSongPos))
{
dwSongPos = dwMemPos - 8;
}
break;
// "DSMP": Sample Data
case IFFID_DSMP:
if ((len >= sizeof(PSMSAMPLE)) && (m_nSamples+1 < MAX_SAMPLES))
{
m_nSamples++;
MODINSTRUMENT *pins = &Ins[m_nSamples];
PSMSAMPLE *psmp = (PSMSAMPLE *)pdata;
swap_PSMSAMPLE(psmp);
smpnames[m_nSamples] = psmp->smpid;
memcpy(m_szNames[m_nSamples], psmp->samplename, 31);
m_szNames[m_nSamples][31] = 0;
samplemap[m_nSamples-1] = (BYTE)m_nSamples;
// Init sample
pins->nGlobalVol = 0x40;
pins->nC4Speed = psmp->samplerate;
pins->nLength = psmp->length;
pins->nLoopStart = psmp->loopstart;
pins->nLoopEnd = psmp->loopend;
pins->nPan = 128;
pins->nVolume = (psmp->defvol+1) * 2;
pins->uFlags = (psmp->flags & 0x80) ? CHN_LOOP : 0;
if (pins->nLoopStart > 0) pins->nLoopStart--;
// Point to sample data
pdata += 0x60;
len -= 0x60;
// Load sample data
if ((pins->nLength > 3) && (len > 3))
{
ReadSample(pins, RS_PCM8D, (LPCSTR)pdata, len);
} else
{
pins->nLength = 0;
}
}
break;
#if 0
default:
{
CHAR s[8], s2[64];
*(DWORD *)s = pchunk->id;
s[4] = 0;
wsprintf(s2, "%s: %4d bytes @ %4d\n", s, pchunk->len, dwMemPos);
OutputDebugString(s2);
}
#endif
}
dwMemPos += pchunk->len;
}
// Step #1: convert song structure
PSMSONGHDR *pSong = (PSMSONGHDR *)(lpStream+dwSongPos+8);
if ((!dwSongPos) || (pSong->channels < 2) || (pSong->channels > 32)) return TRUE;
m_nChannels = pSong->channels;
// Valid song header -> convert attached chunks
{
DWORD dwSongEnd = dwSongPos + 8 + *(DWORD *)(lpStream+dwSongPos+4);
dwMemPos = dwSongPos + 8 + 11; // sizeof(PSMCHUNK)+sizeof(PSMSONGHDR)
while (dwMemPos + 8 < dwSongEnd)
{
PSMCHUNK *pchunk = (PSMCHUNK *)(lpStream+dwMemPos);
swap_PSMCHUNK(pchunk);
dwMemPos += 8;
if ((pchunk->len > dwSongEnd) || (dwMemPos + pchunk->len > dwSongEnd)) break;
PUCHAR pdata = (PUCHAR)(lpStream+dwMemPos);
ULONG len = pchunk->len;
switch(pchunk->id)
{
case IFFID_OPLH:
if (len >= 0x20)
{
UINT pos = len - 3;
while (pos > 5)
{
BOOL bFound = FALSE;
pos -= 5;
DWORD dwName = *(DWORD *)(pdata+pos);
for (UINT i=0; i<nPatterns; i++)
{
DWORD dwPatName = ((PSMPATTERN *)(lpStream+patptrs[i]+8))->name;
if (dwName == dwPatName)
{
bFound = TRUE;
break;
}
}
if ((!bFound) && (pdata[pos+1] > 0) && (pdata[pos+1] <= 0x10)
&& (pdata[pos+3] > 0x40) && (pdata[pos+3] < 0xC0))
{
m_nDefaultSpeed = pdata[pos+1];
m_nDefaultTempo = pdata[pos+3];
break;
}
}
UINT iOrd = 0;
while ((pos+5<len) && (iOrd < MAX_ORDERS))
{
DWORD dwName = *(DWORD *)(pdata+pos);
for (UINT i=0; i<nPatterns; i++)
{
DWORD dwPatName = ((PSMPATTERN *)(lpStream+patptrs[i]+8))->name;
if (dwName == dwPatName)
{
Order[iOrd++] = i;
break;
}
}
pos += 5;
}
}
break;
}
dwMemPos += pchunk->len;
}
}
// Step #2: convert patterns
for (UINT nPat=0; nPat<nPatterns; nPat++)
{
PSMPATTERN *pPsmPat = (PSMPATTERN *)(lpStream+patptrs[nPat]+8);
swap_PSMPATTERN(pPsmPat);
ULONG len = *(DWORD *)(lpStream+patptrs[nPat]+4) - 12;
UINT nRows = pPsmPat->rows;
if (len > pPsmPat->size) len = pPsmPat->size;
if ((nRows < 64) || (nRows > 256)) nRows = 64;
PatternSize[nPat] = nRows;
if ((Patterns[nPat] = AllocatePattern(nRows, m_nChannels)) == NULL) break;
MODCOMMAND *m = Patterns[nPat];
BYTE *p = pPsmPat->data;
UINT pos = 0;
UINT row = 0;
UINT oldch = 0;
BOOL bNewRow = FALSE;
#ifdef PSM_LOG
Log("Pattern %d at offset 0x%04X\n", nPat, (DWORD)(p - (BYTE *)lpStream));
#endif
while ((row < nRows) && (pos+1 < len))
{
UINT flags = p[pos++];
UINT ch = p[pos++];
#ifdef PSM_LOG
//Log("flags+ch: %02X.%02X\n", flags, ch);
#endif
if (((flags & 0xf0) == 0x10) && (ch <= oldch) /*&& (!bNewRow)*/)
{
if ((pos+1<len) && (!(p[pos] & 0x0f)) && (p[pos+1] < m_nChannels))
{
#ifdef PSM_LOG
//if (!nPat) Log("Continuing on new row\n");
#endif
row++;
m += m_nChannels;
oldch = ch;
continue;
}
}
if ((pos >= len) || (row >= nRows)) break;
if (!(flags & 0xf0))
{
#ifdef PSM_LOG
//if (!nPat) Log("EOR(%d): %02X.%02X\n", row, p[pos], p[pos+1]);
#endif
row++;
m += m_nChannels;
bNewRow = TRUE;
oldch = ch;
continue;
}
bNewRow = FALSE;
if (ch >= m_nChannels)
{
#ifdef PSM_LOG
if (!nPat) Log("Invalid channel row=%d (0x%02X.0x%02X)\n", row, flags, ch);
#endif
ch = 0;
}
// Note + Instr
if ((flags & 0x40) && (pos+1 < len))
{
UINT note = p[pos++];
UINT nins = p[pos++];
#ifdef PSM_LOG
//if (!nPat) Log("note+ins: %02X.%02X\n", note, nins);
if ((!nPat) && (nins >= m_nSamples)) Log("WARNING: invalid instrument number (%d)\n", nins);
#endif
if ((note) && (note < 0x80)) note = (note>>4)*12+(note&0x0f)+12+1;
m[ch].instr = samplemap[nins];
m[ch].note = note;
}
// Volume
if ((flags & 0x20) && (pos < len))
{
m[ch].volcmd = VOLCMD_VOLUME;
m[ch].vol = p[pos++] / 2;
}
// Effect
if ((flags & 0x10) && (pos+1 < len))
{
UINT command = p[pos++];
UINT param = p[pos++];
// Convert effects
switch(command)
{
// 01: fine volslide up
case 0x01: command = CMD_VOLUMESLIDE; param |= 0x0f; break;
// 04: fine volslide down
case 0x04: command = CMD_VOLUMESLIDE; param>>=4; param |= 0xf0; break;
// 0C: portamento up
case 0x0C: command = CMD_PORTAMENTOUP; param = (param+1)/2; break;
// 0E: portamento down
case 0x0E: command = CMD_PORTAMENTODOWN; param = (param+1)/2; break;
// 33: Position Jump
case 0x33: command = CMD_POSITIONJUMP; break;
// 34: Pattern break
case 0x34: command = CMD_PATTERNBREAK; break;
// 3D: speed
case 0x3D: command = CMD_SPEED; break;
// 3E: tempo
case 0x3E: command = CMD_TEMPO; break;
// Unknown
default:
#ifdef PSM_LOG
Log("Unknown PSM effect pat=%d row=%d ch=%d: %02X.%02X\n", nPat, row, ch, command, param);
#endif
command = param = 0;
}
m[ch].command = (BYTE)command;
m[ch].param = (BYTE)param;
}
oldch = ch;
}
#ifdef PSM_LOG
if (pos < len)
{
Log("Pattern %d: %d/%d[%d] rows (%d bytes) -> %d bytes left\n", nPat, row, nRows, pPsmPat->rows, pPsmPat->size, len-pos);
}
#endif
}
// Done (finally!)
return TRUE;
}
//////////////////////////////////////////////////////////////
//
// PSM Old Format
//
/*
CONST
c_PSM_MaxOrder = $FF;
c_PSM_MaxSample = $FF;
c_PSM_MaxChannel = $0F;
TYPE
PPSM_Header = ^TPSM_Header;
TPSM_Header = RECORD
PSM_Sign : ARRAY[01..04] OF CHAR; { PSM + #254 }
PSM_SongName : ARRAY[01..58] OF CHAR;
PSM_Byte00 : BYTE;
PSM_Byte1A : BYTE;
PSM_Unknown00 : BYTE;
PSM_Unknown01 : BYTE;
PSM_Unknown02 : BYTE;
PSM_Speed : BYTE;
PSM_Tempo : BYTE;
PSM_Unknown03 : BYTE;
PSM_Unknown04 : WORD;
PSM_OrderLength : WORD;
PSM_PatternNumber : WORD;
PSM_SampleNumber : WORD;
PSM_ChannelNumber : WORD;
PSM_ChannelUsed : WORD;
PSM_OrderPosition : LONGINT;
PSM_ChannelSettingPosition : LONGINT;
PSM_PatternPosition : LONGINT;
PSM_SamplePosition : LONGINT;
{ *** perhaps there are some more infos in a larger header,
but i have not decoded it and so it apears here NOT }
END;
PPSM_Sample = ^TPSM_Sample;
TPSM_Sample = RECORD
PSM_SampleFileName : ARRAY[01..12] OF CHAR;
PSM_SampleByte00 : BYTE;
PSM_SampleName : ARRAY[01..22] OF CHAR;
PSM_SampleUnknown00 : ARRAY[01..02] OF BYTE;
PSM_SamplePosition : LONGINT;
PSM_SampleUnknown01 : ARRAY[01..04] OF BYTE;
PSM_SampleNumber : BYTE;
PSM_SampleFlags : WORD;
PSM_SampleLength : LONGINT;
PSM_SampleLoopBegin : LONGINT;
PSM_SampleLoopEnd : LONGINT;
PSM_Unknown03 : BYTE;
PSM_SampleVolume : BYTE;
PSM_SampleC5Speed : WORD;
END;
PPSM_SampleList = ^TPSM_SampleList;
TPSM_SampleList = ARRAY[01..c_PSM_MaxSample] OF TPSM_Sample;
PPSM_Order = ^TPSM_Order;
TPSM_Order = ARRAY[00..c_PSM_MaxOrder] OF BYTE;
PPSM_ChannelSettings = ^TPSM_ChannelSettings;
TPSM_ChannelSettings = ARRAY[00..c_PSM_MaxChannel] OF BYTE;
CONST
PSM_NotesInPattern : BYTE = $00;
PSM_ChannelInPattern : BYTE = $00;
CONST
c_PSM_SetSpeed = 60;
FUNCTION PSM_Size(FileName : STRING;FilePosition : LONGINT) : LONGINT;
BEGIN
END;
PROCEDURE PSM_UnpackPattern(VAR Source,Destination;PatternLength : WORD);
VAR
Witz : ARRAY[00..04] OF WORD;
I1,I2 : WORD;
I3,I4 : WORD;
TopicalByte : ^BYTE;
Pattern : PUnpackedPattern;
ChannelP : BYTE;
NoteP : BYTE;
InfoByte : BYTE;
CodeByte : BYTE;
InfoWord : WORD;
Effect : BYTE;
Opperand : BYTE;
Panning : BYTE;
Volume : BYTE;
PrevInfo : BYTE;
InfoIndex : BYTE;
BEGIN
Pattern := @Destination;
TopicalByte := @Source;
{ *** Initialize patttern }
FOR I2 := 0 TO c_Maximum_NoteIndex DO
FOR I3 := 0 TO c_Maximum_ChannelIndex DO
BEGIN
Pattern^[I2,I3,c_Pattern_NoteIndex] := $FF;
Pattern^[I2,I3,c_Pattern_SampleIndex] := $00;
Pattern^[I2,I3,c_Pattern_VolumeIndex] := $FF;
Pattern^[I2,I3,c_Pattern_PanningIndex] := $FF;
Pattern^[I2,I3,c_Pattern_EffectIndex] := $00;
Pattern^[I2,I3,c_Pattern_OpperandIndex] := $00;
END;
{ *** Byte-pointer on first pattern-entry }
ChannelP := $00;
NoteP := $00;
InfoByte := $00;
PrevInfo := $00;
InfoIndex := $02;
{ *** read notes in pattern }
PSM_NotesInPattern := TopicalByte^; INC(TopicalByte); DEC(PatternLength); INC(InfoIndex);
PSM_ChannelInPattern := TopicalByte^; INC(TopicalByte); DEC(PatternLength); INC(InfoIndex);
{ *** unpack pattern }
WHILE (INTEGER(PatternLength) > 0) AND (NoteP < c_Maximum_NoteIndex) DO
BEGIN
{ *** Read info-byte }
InfoByte := TopicalByte^; INC(TopicalByte); DEC(PatternLength); INC(InfoIndex);
IF InfoByte <> $00 THEN
BEGIN
ChannelP := InfoByte AND $0F;
IF InfoByte AND 128 = 128 THEN { note and sample }
BEGIN
{ *** read note }
CodeByte := TopicalByte^; INC(TopicalByte); DEC(PatternLength);
DEC(CodeByte);
CodeByte := CodeByte MOD 12 * 16 + CodeByte DIV 12 + 2;
Pattern^[NoteP,ChannelP,c_Pattern_NoteIndex] := CodeByte;
{ *** read sample }
CodeByte := TopicalByte^; INC(TopicalByte); DEC(PatternLength);
Pattern^[NoteP,ChannelP,c_Pattern_SampleIndex] := CodeByte;
END;
IF InfoByte AND 64 = 64 THEN { Volume }
BEGIN
CodeByte := TopicalByte^; INC(TopicalByte); DEC(PatternLength);
Pattern^[NoteP,ChannelP,c_Pattern_VolumeIndex] := CodeByte;
END;
IF InfoByte AND 32 = 32 THEN { effect AND opperand }
BEGIN
Effect := TopicalByte^; INC(TopicalByte); DEC(PatternLength);
Opperand := TopicalByte^; INC(TopicalByte); DEC(PatternLength);
CASE Effect OF
c_PSM_SetSpeed:
BEGIN
Effect := c_I_Set_Speed;
END;
ELSE
BEGIN
Effect := c_I_NoEffect;
Opperand := $00;
END;
END;
Pattern^[NoteP,ChannelP,c_Pattern_EffectIndex] := Effect;
Pattern^[NoteP,ChannelP,c_Pattern_OpperandIndex] := Opperand;
END;
END ELSE INC(NoteP);
END;
END;
PROCEDURE PSM_Load(FileName : STRING;FilePosition : LONGINT;VAR Module : PModule;VAR ErrorCode : WORD);
{ *** caution : Module has to be inited before!!!! }
VAR
Header : PPSM_Header;
Sample : PPSM_SampleList;
Order : PPSM_Order;
ChannelSettings : PPSM_ChannelSettings;
MultiPurposeBuffer : PByteArray;
PatternBuffer : PUnpackedPattern;
TopicalParaPointer : WORD;
InFile : FILE;
I1,I2 : WORD;
I3,I4 : WORD;
TempW : WORD;
TempB : BYTE;
TempP : PByteArray;
TempI : INTEGER;
{ *** copy-vars for loop-extension }
CopySource : LONGINT;
CopyDestination : LONGINT;
CopyLength : LONGINT;
BEGIN
{ *** try to open file }
ASSIGN(InFile,FileName);
{$I-}
RESET(InFile,1);
{$I+}
IF IORESULT <> $00 THEN
BEGIN
EXIT;
END;
{$I-}
{ *** seek start of module }
IF FILESIZE(InFile) < FilePosition THEN
BEGIN
EXIT;
END;
SEEK(InFile,FilePosition);
{ *** look for enough memory for temporary variables }
IF MEMAVAIL < SIZEOF(TPSM_Header) + SIZEOF(TPSM_SampleList) +
SIZEOF(TPSM_Order) + SIZEOF(TPSM_ChannelSettings) +
SIZEOF(TByteArray) + SIZEOF(TUnpackedPattern)
THEN
BEGIN
EXIT;
END;
{ *** init dynamic variables }
NEW(Header);
NEW(Sample);
NEW(Order);
NEW(ChannelSettings);
NEW(MultiPurposeBuffer);
NEW(PatternBuffer);
{ *** read header }
BLOCKREAD(InFile,Header^,SIZEOF(TPSM_Header));
{ *** test if this is a DSM-file }
IF NOT ((Header^.PSM_Sign[1] = 'P') AND (Header^.PSM_Sign[2] = 'S') AND
(Header^.PSM_Sign[3] = 'M') AND (Header^.PSM_Sign[4] = #254)) THEN
BEGIN
ErrorCode := c_NoValidFileFormat;
CLOSE(InFile);
EXIT;
END;
{ *** read order }
SEEK(InFile,FilePosition + Header^.PSM_OrderPosition);
BLOCKREAD(InFile,Order^,Header^.PSM_OrderLength);
{ *** read channelsettings }
SEEK(InFile,FilePosition + Header^.PSM_ChannelSettingPosition);
BLOCKREAD(InFile,ChannelSettings^,SIZEOF(TPSM_ChannelSettings));
{ *** read samplelist }
SEEK(InFile,FilePosition + Header^.PSM_SamplePosition);
BLOCKREAD(InFile,Sample^,Header^.PSM_SampleNumber * SIZEOF(TPSM_Sample));
{ *** copy header to intern NTMIK-structure }
Module^.Module_Sign := 'MF';
Module^.Module_FileFormatVersion := $0100;
Module^.Module_SampleNumber := Header^.PSM_SampleNumber;
Module^.Module_PatternNumber := Header^.PSM_PatternNumber;
Module^.Module_OrderLength := Header^.PSM_OrderLength;
Module^.Module_ChannelNumber := Header^.PSM_ChannelNumber+1;
Module^.Module_Initial_GlobalVolume := 64;
Module^.Module_Initial_MasterVolume := $C0;
Module^.Module_Initial_Speed := Header^.PSM_Speed;
Module^.Module_Initial_Tempo := Header^.PSM_Tempo;
{ *** paragraph 01 start }
Module^.Module_Flags := c_Module_Flags_ZeroVolume * BYTE(1) +
c_Module_Flags_Stereo * BYTE(1) +
c_Module_Flags_ForceAmigaLimits * BYTE(0) +
c_Module_Flags_Panning * BYTE(1) +
c_Module_Flags_Surround * BYTE(1) +
c_Module_Flags_QualityMixing * BYTE(1) +
c_Module_Flags_FastVolumeSlides * BYTE(0) +
c_Module_Flags_SpecialCustomData * BYTE(0) +
c_Module_Flags_SongName * BYTE(1);
I1 := $01;
WHILE (Header^.PSM_SongName[I1] > #00) AND (I1 < c_Module_SongNameLength) DO
BEGIN
Module^.Module_Name[I1] := Header^.PSM_SongName[I1];
INC(I1);
END;
Module^.Module_Name[c_Module_SongNameLength] := #00;
{ *** Init channelsettings }
FOR I1 := 0 TO c_Maximum_ChannelIndex DO
BEGIN
IF I1 < Header^.PSM_ChannelUsed THEN
BEGIN
{ *** channel enabled }
Module^.Module_ChannelSettingPointer^[I1].ChannelSettings_GlobalVolume := 64;
Module^.Module_ChannelSettingPointer^[I1].ChannelSettings_Panning := (ChannelSettings^[I1]) * $08;
Module^.Module_ChannelSettingPointer^[I1].ChannelSettings_Code := I1 + $10 * BYTE(ChannelSettings^[I1] > $08) +
c_ChannelSettings_Code_ChannelEnabled * BYTE(1) +
c_ChannelSettings_Code_ChannelDigital * BYTE(1);
Module^.Module_ChannelSettingPointer^[I1].ChannelSettings_Controls :=
c_ChannelSettings_Controls_EnhancedMode * BYTE(1) +
c_ChannelSettings_Controls_SurroundMode * BYTE(0);
END
ELSE
BEGIN
{ *** channel disabled }
Module^.Module_ChannelSettingPointer^[I1].ChannelSettings_GlobalVolume := $00;
Module^.Module_ChannelSettingPointer^[I1].ChannelSettings_Panning := $00;
Module^.Module_ChannelSettingPointer^[I1].ChannelSettings_Code := $00;
Module^.Module_ChannelSettingPointer^[I1].ChannelSettings_Controls := $00;
END;
END;
{ *** init and copy order }
FILLCHAR(Module^.Module_OrderPointer^,c_Maximum_OrderIndex+1,$FF);
MOVE(Order^,Module^.Module_OrderPointer^,Header^.PSM_OrderLength);
{ *** read pattern }
SEEK(InFile,FilePosition + Header^.PSM_PatternPosition);
NTMIK_LoaderPatternNumber := Header^.PSM_PatternNumber-1;
FOR I1 := 0 TO Header^.PSM_PatternNumber-1 DO
BEGIN
NTMIK_LoadPatternProcedure;
{ *** read length }
BLOCKREAD(InFile,TempW,2);
{ *** read pattern }
BLOCKREAD(InFile,MultiPurposeBuffer^,TempW-2);
{ *** unpack pattern and set notes per channel to 64 }
PSM_UnpackPattern(MultiPurposeBuffer^,PatternBuffer^,TempW);
NTMIK_PackPattern(MultiPurposeBuffer^,PatternBuffer^,PSM_NotesInPattern);
TempW := WORD(256) * MultiPurposeBuffer^[01] + MultiPurposeBuffer^[00];
GETMEM(Module^.Module_PatternPointer^[I1],TempW);
MOVE(MultiPurposeBuffer^,Module^.Module_PatternPointer^[I1]^,TempW);
{ *** next pattern }
END;
{ *** read samples }
NTMIK_LoaderSampleNumber := Header^.PSM_SampleNumber;
FOR I1 := 1 TO Header^.PSM_SampleNumber DO
BEGIN
NTMIK_LoadSampleProcedure;
{ *** get index for sample }
I3 := Sample^[I1].PSM_SampleNumber;
{ *** clip PSM-sample }
IF Sample^[I1].PSM_SampleLoopEnd > Sample^[I1].PSM_SampleLength
THEN Sample^[I1].PSM_SampleLoopEnd := Sample^[I1].PSM_SampleLength;
{ *** init intern sample }
NEW(Module^.Module_SamplePointer^[I3]);
FILLCHAR(Module^.Module_SamplePointer^[I3]^,SIZEOF(TSample),$00);
FILLCHAR(Module^.Module_SamplePointer^[I3]^.Sample_SampleName,c_Sample_SampleNameLength,#32);
FILLCHAR(Module^.Module_SamplePointer^[I3]^.Sample_FileName,c_Sample_FileNameLength,#32);
{ *** copy informations to intern sample }
I2 := $01;
WHILE (Sample^[I1].PSM_SampleName[I2] > #00) AND (I2 < c_Sample_SampleNameLength) DO
BEGIN
Module^.Module_SamplePointer^[I3]^.Sample_SampleName[I2] := Sample^[I1].PSM_SampleName[I2];
INC(I2);
END;
Module^.Module_SamplePointer^[I3]^.Sample_Sign := 'DF';
Module^.Module_SamplePointer^[I3]^.Sample_FileFormatVersion := $00100;
Module^.Module_SamplePointer^[I3]^.Sample_Position := $00000000;
Module^.Module_SamplePointer^[I3]^.Sample_Selector := $0000;
Module^.Module_SamplePointer^[I3]^.Sample_Volume := Sample^[I1].PSM_SampleVolume;
Module^.Module_SamplePointer^[I3]^.Sample_LoopCounter := $00;
Module^.Module_SamplePointer^[I3]^.Sample_C5Speed := Sample^[I1].PSM_SampleC5Speed;
Module^.Module_SamplePointer^[I3]^.Sample_Length := Sample^[I1].PSM_SampleLength;
Module^.Module_SamplePointer^[I3]^.Sample_LoopBegin := Sample^[I1].PSM_SampleLoopBegin;
Module^.Module_SamplePointer^[I3]^.Sample_LoopEnd := Sample^[I1].PSM_SampleLoopEnd;
{ *** now it's time for the flags }
Module^.Module_SamplePointer^[I3]^.Sample_Flags :=
c_Sample_Flags_DigitalSample * BYTE(1) +
c_Sample_Flags_8BitSample * BYTE(1) +
c_Sample_Flags_UnsignedSampleData * BYTE(1) +
c_Sample_Flags_Packed * BYTE(0) +
c_Sample_Flags_LoopCounter * BYTE(0) +
c_Sample_Flags_SampleName * BYTE(1) +
c_Sample_Flags_LoopActive *
BYTE(Sample^[I1].PSM_SampleFlags AND (LONGINT(1) SHL 15) = (LONGINT(1) SHL 15));
{ *** alloc memory for sample-data }
E_Getmem(Module^.Module_SamplePointer^[I3]^.Sample_Selector,
Module^.Module_SamplePointer^[I3]^.Sample_Position,
Module^.Module_SamplePointer^[I3]^.Sample_Length + c_LoopExtensionSize);
{ *** read out data }
EPT(TempP).p_Selector := Module^.Module_SamplePointer^[I3]^.Sample_Selector;
EPT(TempP).p_Offset := $0000;
SEEK(InFile,Sample^[I1].PSM_SamplePosition);
E_BLOCKREAD(InFile,TempP^,Module^.Module_SamplePointer^[I3]^.Sample_Length);
{ *** 'coz the samples are signed in a DSM-file -> PC-fy them }
IF Module^.Module_SamplePointer^[I3]^.Sample_Length > 4 THEN
BEGIN
CopyLength := Module^.Module_SamplePointer^[I3]^.Sample_Length;
{ *** decode sample }
ASM
DB 066h; MOV CX,WORD PTR CopyLength
{ *** load sample selector }
MOV ES,WORD PTR TempP[00002h]
DB 066h; XOR SI,SI
DB 066h; XOR DI,DI
XOR AH,AH
{ *** conert all bytes }
@@MainLoop:
DB 026h; DB 067h; LODSB
ADD AL,AH
MOV AH,AL
DB 067h; STOSB
DB 066h; LOOP @@MainLoop
END;
{ *** make samples unsigned }
ASM
DB 066h; MOV CX,WORD PTR CopyLength
{ *** load sample selector }
MOV ES,WORD PTR TempP[00002h]
DB 066h; XOR SI,SI
DB 066h; XOR DI,DI
{ *** conert all bytes }
@@MainLoop:
DB 026h; DB 067h; LODSB
SUB AL,080h
DB 067h; STOSB
DB 066h; LOOP @@MainLoop
END;
{ *** Create Loop-Extension }
IF Module^.Module_SamplePointer^[I3]^.Sample_Flags AND c_Sample_Flags_LoopActive = c_Sample_Flags_LoopActive THEN
BEGIN
CopySource := Module^.Module_SamplePointer^[I3]^.Sample_LoopBegin;
CopyDestination := Module^.Module_SamplePointer^[I3]^.Sample_LoopEnd;
CopyLength := CopyDestination - CopySource;
ASM
{ *** load sample-selector }
MOV ES,WORD PTR TempP[00002h]
DB 066h; MOV DI,WORD PTR CopyDestination
{ *** calculate number of full sample-loops to copy }
XOR DX,DX
MOV AX,c_LoopExtensionSize
MOV BX,WORD PTR CopyLength
DIV BX
OR AX,AX
JE @@NoFullLoop
{ *** copy some full-loops (size=bx) }
MOV CX,AX
@@InnerLoop:
PUSH CX
DB 066h; MOV SI,WORD PTR CopySource
MOV CX,BX
DB 0F3h; DB 026h,067h,0A4h { REP MOVS BYTE PTR ES:[EDI],ES:[ESI] }
POP CX
LOOP @@InnerLoop
@@NoFullLoop:
{ *** calculate number of rest-bytes to copy }
DB 066h; MOV SI,WORD PTR CopySource
MOV CX,DX
DB 0F3h; DB 026h,067h,0A4h { REP MOVS BYTE PTR ES:[EDI],ES:[ESI] }
END;
END
ELSE
BEGIN
CopyDestination := Module^.Module_SamplePointer^[I3]^.Sample_Length;
ASM
{ *** load sample-selector }
MOV ES,WORD PTR TempP[00002h]
DB 066h; MOV DI,WORD PTR CopyDestination
{ *** clear extension }
MOV CX,c_LoopExtensionSize
MOV AL,080h
DB 0F3h; DB 067h,0AAh { REP STOS BYTE PTR ES:[EDI] }
END;
END;
END;
{ *** next sample }
END;
{ *** init period-ranges }
NTMIK_MaximumPeriod := $0000D600 SHR 1;
NTMIK_MinimumPeriod := $0000D600 SHR 8;
{ *** close file }
CLOSE(InFile);
{ *** dispose all dynamic variables }
DISPOSE(Header);
DISPOSE(Sample);
DISPOSE(Order);
DISPOSE(ChannelSettings);
DISPOSE(MultiPurposeBuffer);
DISPOSE(PatternBuffer);
{ *** set errorcode to noerror }
ErrorCode := c_NoError;
END;
*/