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wtmd2mid.c
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wtmd2mid.c
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// Wolf Team MegaDrive -> Midi Converter
// -------------------------------------
// Written by Valley Bell, 16 July 2014
// Last Update: 18 July 2014
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#include "stdtype.h"
#include <stdbool.h>
void ConvertAllSongs(UINT16 MusBankList);
UINT8 Wolfteam2Mid(UINT32 SongStartPos);
static void WriteEvent(UINT8* Buffer, UINT32* Pos, UINT32* Delay, UINT8 Evt, UINT8 Val1, UINT8 Val2);
static void WriteMidiValue(UINT8* Buffer, UINT32* Pos, UINT32 Value);
static UINT8 WriteFileData(UINT32 DataLen, const UINT8* Data, UINT8 SongID, const char* Extention);
static double Lin2DB(UINT8 LinVol);
static UINT8 DB2Mid(double DB);
static UINT8 PanBits2MidiPan(UINT8 Pan);
static UINT16 ReadBE16(const UINT8* Data);
static UINT32 ReadBE32(const UINT8* Data);
static UINT16 ReadLE16(const UINT8* Data);
static void WriteBE32(UINT8* Buffer, UINT32 Value);
static void WriteBE16(UINT8* Buffer, UINT16 Value);
static void LZSS_Init(void);
void LZSS_Decode(UINT32 CmpLen, const UINT8* CmpData, UINT32 DecLen, UINT8* DecData);
UINT8 DecompressArcOdyssey(const UINT8* ComprData, UINT32* RetDataLen, UINT8** RetData);
static UINT32 ScanForData(UINT32 DataLen, const UINT8* Data, UINT32 MagicLen,
const UINT8* MagicData, UINT32 StartPos);
static UINT32 ReadLEA(const UINT8* Code, UINT32 InstPos);
void WolfTeamDriver_Autodetection(void);
typedef struct running_note
{
UINT8 MidChn;
UINT8 Note;
UINT16 RemLen;
} RUN_NOTE;
#define RAMMODE_NONE 0x00 // don't have Z80 RAM
#define RAMMODE_PTR 0x01 // Z80 RAM data is pointer to ROM data
#define RAMMODE_ALLOC 0x02 // Z80 RAM data was allocated and has to be free'd
UINT32 ROMLen;
UINT8* ROMData;
UINT8 Z80DrvMode;
UINT32 Z80DrvLen;
UINT8* Z80DrvData;
UINT16 Z80MusList;
UINT32 MidLen;
UINT8* MidData;
#define MAX_RUN_NOTES 0x10 // effectively it won't play more than 2 notes at the same time
// (2 because this does pitch bends)
UINT8 RunNoteCnt;
RUN_NOTE RunNotes[MAX_RUN_NOTES];
bool FixDrumSet;
bool FixVolume;
char OutFileBase[0x100];
int main(int argc, char* argv[])
{
FILE* hFile;
char* StrPtr;
UINT8 PLMode;
UINT32 SongPos;
char* TempPnt;
printf("Wolf Team MegaDrive -> Midi Converter\n-------------------------------------\n");
if (argc < 3)
{
printf("Usage: wtmd2mid.exe Options ROM.bin\n");
printf("Options: (options can be combined, default setting is 'dv')\n");
printf(" r Raw conversion (other options are ignored)\n");
printf(" d fix Drums (remaps to GM drums)\n");
printf(" v fix Volume (convert linear to logarithmic MIDI)\n");
printf("Supported/verified games: Earnest Evans, El Viento, Arcus Odyssey.\n");
return 0;
}
FixDrumSet = true;
FixVolume = true;
PLMode = 0x00;
SongPos = 0x00;
StrPtr = argv[1];
while(*StrPtr != '\0')
{
switch(toupper(*StrPtr))
{
case 'R':
FixDrumSet = false;
FixVolume = false;
break;
case 'D':
FixDrumSet = true;
break;
case 'V':
FixVolume = true;
break;
}
StrPtr ++;
}
strcpy(OutFileBase, argv[2]);
TempPnt = strrchr(OutFileBase, '.');
if (TempPnt == NULL)
TempPnt = OutFileBase + strlen(OutFileBase);
*TempPnt = 0x00;
hFile = fopen(argv[2], "rb");
if (hFile == NULL)
{
printf("Error opening file!\n");
return 1;
}
fseek(hFile, 0x00, SEEK_END);
ROMLen = ftell(hFile);
if (ROMLen > 0x400000) // 4 MB
ROMLen = 0x400000;
fseek(hFile, 0x00, SEEK_SET);
ROMData = (UINT8*)malloc(ROMLen);
fread(ROMData, 0x01, ROMLen, hFile);
fclose(hFile);
if (PLMode)
{
Z80DrvMode = RAMMODE_NONE;
Z80MusList = 0x0000;
WolfTeamDriver_Autodetection();
ConvertAllSongs(Z80MusList);
}
else
{
Wolfteam2Mid(SongPos);
WriteFileData(MidLen, MidData, 0xFF, "mid");
free(MidData); MidData = NULL;
}
printf("Done.\n");
if (Z80DrvMode == RAMMODE_ALLOC)
{
free(Z80DrvData); Z80DrvData = NULL;
}
#ifdef _DEBUG
getchar();
#endif
return 0;
}
void ConvertAllSongs(UINT16 MusBankList)
{
UINT8 SongCnt;
UINT8 CurSong;
UINT16 CurPos;
UINT32 SongBank;
UINT8 SongID;
UINT32 SongOfs;
SongCnt = 0x00;
CurPos = MusBankList;
while(CurPos < Z80DrvLen)
{
if (Z80DrvData[CurPos + 0x01] != 0xFF)
{
if ((UINT32)(Z80DrvData[CurPos + 0x00] << 15) >= ROMLen ||
Z80DrvData[CurPos + 0x01] >= 0x40)
break;
}
SongCnt ++;
CurPos += 0x02;
}
printf("%u songs found.\n", SongCnt);
CurPos = MusBankList;
for (CurSong = 0x00; CurSong < SongCnt; CurSong ++, CurPos += 0x02)
{
SongID = Z80DrvData[CurPos + 0x00];
SongBank = Z80DrvData[CurPos + 0x01] << 15; // Song Bank
SongOfs = ReadBE32(&ROMData[SongBank | (SongID << 2)]);
SongOfs = SongBank | (SongOfs & 0x7FFF);
printf("Song %02X/%02X - Bank %02X, ID %02X, Offset %06X\n", 1 + CurSong, SongCnt,
SongBank >> 15, SongID, SongOfs);
Wolfteam2Mid(SongOfs);
if (MidLen)
{
WriteFileData(ReadLE16(&ROMData[SongOfs + 0x02]), &ROMData[SongOfs], 1 + CurSong, "bin");
WriteFileData(MidLen, MidData, 1 + CurSong, "mid");
}
free(MidData); MidData = NULL;
}
return;
}
typedef struct
{
UINT8 Ins;
UINT8 Transp;
} INS_TABLE;
UINT8 Wolfteam2Mid(UINT32 SongStartPos)
{
const UINT8 DAC_MAP[] = {0x00, 0x24, 0x26, 0x29, 0x2D, 0x30, 0x25, 0x27, 0x2A, 0x00, 0x31}; // X68000 Drum Set
//const UINT8 DAC_MAP[] = {0x00, 0x24, 0x26, 0x29, 0x2D, 0x30, 0x00, 0x27}; // MegaDrive Drum Set
const INS_TABLE INS_MAP[] =
{ {0x21, 0}, // 00 E.Bass
{0x37, 0}, // 01 Shio.B - El Viento: Orch. Hit
{0x1E, 0}, // 02 Hard.R
{0x3D, 0}, // 03 NewBrs [verify]
{0xFF, 0}, // 04 KAZAN
{0x0C, +24}, // 05 Marimb
{0x05, +12}, // 06 EPian3
{0x2E, 0}, // 07 Hrap [verify]
{0x31, 0}, // 08 Str2 [verify]
{0x06, +12}, // 09 Cemba1
{0x3E, +12}, // 0A NewBrs
{0x26, 0}, // 0B DnaBas
{0x07, 0}, // 0C CLAVI [verify]
{0x3C, +12}, // 0D NewHrn
{0xFF, 0}, // 0E NOBISI
{0x01, +12}, // 0F APiano
{0x08, +12}, // 10 TubBel
{0x10, 0}, // 11 EOrg1 [verify]
{0xFF, 0}, // 12 BiYoon
{0x34, +12}, // 13 Chorus
{0xFF, 0}, // 14 KARAN
{0x23, +12}, // 15 Paon (ﾊﾟｵｰﾝ)
{0x49, +12}, // 16 FLUTE
{0xFF, 0}, // 17 N.Bass
{0x22, 0}, // 18 H.EBas
{0x46, 0}, // 19 Basson
{0x16, +12}, // 1A Uno Harm (ｳﾉHarm)
{0x33, 0}, // 1B SynStr [verify]
{0x47, +12}, // 1C Clarin
{0x20, 0}, // 1D KBASS1 [verify]
{0x27, 0}, // 1E SBASS2 [verify]
{0x1D, 0}, // 1F DGUITA [verify]
{0x25, 0}, // 20 SBASS [verify]
};
UINT16 SongLen;
const UINT8* SongData;
struct
{
UINT8 Mode;
UINT8 Pan; // Stereo Bits
UINT16 Ptr;
} ChnList[0x10];
UINT16 TickpQrt;
UINT8 LoopCnt;
UINT8 SongMode;
UINT8 TrkCnt;
UINT8 CurTrk;
UINT16 SegBase;
UINT16 SegIdx;
UINT16 InPos;
UINT32 DstPos;
UINT32 TrkBase;
UINT8 MidChn;
UINT8 DrumMode;
bool TrkEnd;
UINT8 CurCmd;
UINT8 LoopIdx;
UINT8 LoopCount;
UINT16 LoopSeg;
UINT32 TempLng;
UINT16 TempSht;
UINT8 TempByt;
UINT8 CurNote;
UINT32 CurDly;
UINT8 ChnVol;
INT8 NoteMove;
UINT8 TrkState;
UINT8 PBRange;
UINT8 CurNoteLen;
UINT8 CurNoteDly;
UINT8 NewNoteLen;
UINT8 NewNoteDly;
UINT8 PrevNoteLen;
UINT8 PrevNoteDly;
UINT8 MsgMask;
UINT8 InitTempo;
SongData = &ROMData[SongStartPos];
SongLen = ReadLE16(&SongData[0x02]);
TrkCnt = 0x09;
TickpQrt = 48;
TempSht = ReadLE16(&SongData[0x04]);
if (TempSht <= 0x10)
LoopCnt = 1;
else
LoopCnt = 2;
MidLen = 0x20000; // 128 KB should be enough
MidData = (UINT8*)malloc(MidLen);
SongMode = SongData[0x01];
if (SongMode != 'B' && SongMode != 'F')
{
printf("Invalid Song Mode %c!\n", SongData[0x01]);
MidLen = 0;
return 1;
}
DstPos = 0x00;
WriteBE32(&MidData[DstPos + 0x00], 0x4D546864); // write 'MThd'
WriteBE32(&MidData[DstPos + 0x04], 0x00000006);
DstPos += 0x08;
WriteBE16(&MidData[DstPos + 0x00], 0x0001); // Format 1
WriteBE16(&MidData[DstPos + 0x02], 1 + TrkCnt);
WriteBE16(&MidData[DstPos + 0x04], TickpQrt); // Ticks per Quarter: 48
DstPos += 0x06;
InPos = 0x00;
WriteBE32(&MidData[DstPos + 0x00], 0x4D54726B); // write 'MTrk'
DstPos += 0x08;
TrkBase = DstPos;
CurDly = 0x00;
InPos += 0x06; // skip main header
TempByt = 0x10; // Sequence Name Length
WriteEvent(MidData, &DstPos, &CurDly, 0xFF, 0x03, TempByt);
memcpy(&MidData[DstPos], &SongData[InPos], TempByt);
InPos += TempByt; DstPos += TempByt;
InitTempo = SongData[InPos];
WriteEvent(MidData, &DstPos, &CurDly, 0xFF, 0x51, 0x03);
if (1)
{
TempLng = 60000000 / InitTempo; // base guessed (seems to be a pretty good guess though)
}
else
{
// 1. normal formula with all steps
//TimerBVal = 13000 / (InitTempo * 3.0f); // Timer B value (without 0x100-b)
//TempSng = (TempSng * 0x10) * (6 * 24) / 7670454; // Period
//TempLng = 1000000 * TickpQrt * TempSng; // Microseconds per Quarter (MIDI value)
// 2. slightly optimized formula
//TempSng = 13000 * 0x10 * 48 * TickpQrt / (float)(7670454 * InitTempo);
//TempLng = 1000000 * TempSng;
// 3. optimized + rounding + no floating point
TempLng = 7670454 * InitTempo;
TempLng = (UINT32)( ((UINT64)1000000 * 9984000 * TickpQrt + TempLng / 2) / TempLng );
}
WriteBE32(&MidData[DstPos - 0x01], TempLng);
MidData[DstPos - 0x01] = 0x03; // write again, because the above instruction overwrote it
DstPos += 0x03;
LoopSeg = 0x0001;
InPos += 0x08; // skip second header
WriteEvent(MidData, &DstPos, &CurDly, 0xFF, 0x2F, 0x00);
WriteBE32(&MidData[TrkBase - 0x04], DstPos - TrkBase); // write Track Length
for (CurTrk = 0x00; CurTrk < TrkCnt; CurTrk ++, InPos += 0x04)
{
ChnList[CurTrk].Mode = SongData[InPos + 0x00];
ChnList[CurTrk].Pan = SongData[InPos + 0x01];
memcpy(&ChnList[CurTrk].Ptr, &SongData[InPos + 0x02], 0x02);
}
for (CurTrk = 0x00; CurTrk < TrkCnt; CurTrk ++)
{
SegBase = ChnList[CurTrk].Ptr;
WriteBE32(&MidData[DstPos + 0x00], 0x4D54726B); // write 'MTrk'
DstPos += 0x08;
TrkBase = DstPos;
CurDly = 0x00;
TrkEnd = (ChnList[CurTrk].Mode == 0x00);
LoopIdx = 0x00;
LoopCount = 0;
// Tracks are: FM 1-7, Sample 1 (melodic), Sample 2 (drums)
// Sample 1: instrument = sample, note = pitch
// Sample 2: instrument = ignored, note = sample
MidChn = 1 + CurTrk; // Channel 0 is reserved for SFX, and so track 8 ends up on the Drum channel
DrumMode = (CurTrk == 8);
ChnVol = 0x7F;
TrkState = 0x00;
NoteMove = 0x00;
RunNoteCnt = 0x00;
MsgMask = 0x00;
SegIdx = 0x00;
InPos = 0x0000;
PBRange = 0x00;
if (! TrkEnd || ChnList[CurTrk].Pan)
{
TempByt = PanBits2MidiPan(ChnList[CurTrk].Pan);
WriteEvent(MidData, &DstPos, &CurDly, 0xB0 | MidChn, 0x0A, TempByt);
if (DrumMode) // Drum Channel - write Instrument Change
{
WriteEvent(MidData, &DstPos, &CurDly, 0xC0 | MidChn, 0x08, 0x00);
WriteEvent(MidData, &DstPos, &CurDly, 0xB0 | MidChn, 0x07, ChnVol);
}
}
CurNoteDly = NewNoteDly = PrevNoteDly = 0x00;
CurNoteLen = NewNoteLen = PrevNoteLen = 0x00;
while(! TrkEnd)
{
if (InPos == 0x0000)
{
//if (SegIdx == 0xFFFF)
// break;
memcpy(&InPos, &SongData[SegBase + SegIdx * 0x02], 0x02);
if (InPos == 0xFFFF)
{
if (LoopSeg >= SegIdx)
break;
LoopCount ++;
if (LoopCount >= LoopCnt)
{
if (LoopCnt > 1)
WriteEvent(MidData, &DstPos, &CurDly, 0xB0 | MidChn, 0x6F, LoopCount);
break;
}
SegIdx = LoopSeg;
InPos = 0x00;
continue;
}
if (SegIdx == LoopSeg && LoopCnt > 1)
WriteEvent(MidData, &DstPos, &CurDly, 0xB0 | MidChn, 0x6F, LoopCount);
SegIdx ++;
}
CurCmd = SongData[InPos];
if (SongMode == 'B')
{
if (CurCmd < 0x80)
CurCmd = 0x00;
else if (CurCmd < 0xE0)
CurCmd = 0x01;
else //if (CurCmd >= 0xE0)
CurCmd = CurCmd;
}
else if (SongMode == 'F')
{
static UINT8 FMODE_CMD_TBL[0x04] = {0xE0, 0xE1, 0xE2, 0xE4};
if (CurCmd == 0xDC)
CurCmd = 0x02; // Previous Note
else if (CurCmd >= 0xEC && CurCmd <= 0xEF)
CurCmd = FMODE_CMD_TBL[CurCmd - 0xEC];
else if (CurCmd >= 0xFC && CurCmd <= 0xFF)
CurCmd = CurCmd;
else if (CurCmd < 0x80)
CurCmd = 0x00;
else //if (CurCmd >= 0x80)
CurCmd = 0x01;
}
if (CurCmd < 0xE0)
{
if (CurCmd == 0x00) // 00..7F
{
PrevNoteDly = NewNoteDly;
PrevNoteLen = NewNoteLen;
CurCmd = SongData[InPos + 0x00];
if (DrumMode)
{
WriteEvent(MidData, &DstPos, &CurDly, 0x7F, 0x00, 0x00); // flush DAC notes
// The drum track is special and lacks a note length.
NewNoteDly = SongData[InPos + 0x01];
//NewNoteLen = NewNoteDly ? (NewNoteDly - 1) : 1;
NewNoteLen = NewNoteDly;
InPos += 0x02;
}
else
{
NewNoteDly = SongData[InPos + 0x01];
NewNoteLen = SongData[InPos + 0x02];
InPos += 0x03;
}
CurNoteDly = NewNoteDly;
CurNoteLen = NewNoteLen;
}
else if (CurCmd == 0x01) // 80..DF, E0..EB, F0..FB
{
CurCmd = SongData[InPos];
CurNoteDly = NewNoteDly;
CurNoteLen = NewNoteLen;
InPos ++;
}
else if (CurCmd == 0x02) // command DC
{
InPos ++;
// reuse PrevNoteDly/Len
CurCmd = SongData[InPos];
CurNoteDly = PrevNoteDly;
CurNoteLen = PrevNoteLen;
InPos ++;
}
if (DrumMode)
{
// DAC channel
CurNote = CurCmd & 0x7F;
if (FixDrumSet && CurNote)
{
if (CurNote < (sizeof(DAC_MAP) / sizeof(UINT8)))
CurNote = DAC_MAP[CurCmd];
else
CurNote = 0x00;
if (! CurNote)
printf("Ununsed drum %02X found!\n", CurCmd);
}
if (! CurNote)
CurNote = (CurCmd & 0x7F) + NoteMove;
}
else
{
// FM channels
CurNote = CurCmd & 0x0F;
CurNote += ((CurCmd & 0x70) >> 4) * 12;
CurNote += NoteMove;
if (! CurNoteLen)
CurNote = 0x00;
}
WriteEvent(MidData, &DstPos, &CurDly, 0x00, 0x00, 0x00);
for (TempByt = 0x00; TempByt < RunNoteCnt; TempByt ++)
{
if (RunNotes[TempByt].Note == CurNote)
{
RunNotes[TempByt].RemLen = (UINT16)CurDly + CurNoteLen;
break;
}
}
if (TempByt >= RunNoteCnt && CurNote > 0x00)
{
// handle Note Portamento
if (RunNoteCnt)
{
if (! (TrkState & 0x01))
{
if (CurDly > 0)
{
TrkState |= 0x04; // write the Portamento Controls one tick earlier
CurDly --;
}
if (! (TrkState & 0x02))
{
WriteEvent(MidData, &DstPos, &CurDly, 0xB0 | MidChn, 0x05, 0x18);
TrkState |= 0x02;
}
WriteEvent(MidData, &DstPos, &CurDly, 0xB0 | MidChn, 0x41, 0x7F);
TrkState |= 0x01;
if (TrkState & 0x04)
{
TrkState &= ~0x04;
CurDly ++;
}
}
}
else
{
if (TrkState & 0x01)
{
WriteEvent(MidData, &DstPos, &CurDly, 0xB0 | MidChn, 0x41, 0x00);
TrkState &= ~0x01;
}
}
WriteEvent(MidData, &DstPos, &CurDly, 0x90 | MidChn, CurNote, 0x7F);
if (RunNoteCnt < MAX_RUN_NOTES)
{
RunNotes[RunNoteCnt].MidChn = MidChn;
RunNotes[RunNoteCnt].Note = CurNote;
RunNotes[RunNoteCnt].RemLen = CurNoteLen;
RunNoteCnt ++;
}
}
CurDly += CurNoteDly;
}
else
{
switch(CurCmd)
{
case 0xE0: // Set Instrument
CurCmd = SongData[InPos + 0x02];
if (CurTrk < 7) // FM 1-7 only
{
if (CurCmd < (sizeof(INS_MAP) / sizeof(INS_TABLE)))
{
TempByt = INS_MAP[CurCmd].Ins;
NoteMove = INS_MAP[CurCmd].Transp;
}
else
{
TempByt = 0xFF;
}
if (TempByt == 0xFF)
{
printf("Warning! Unmapped instrument %02X! (Chn %u)\n", CurCmd, 1 + MidChn);
TempByt = CurCmd;
NoteMove = 0;
// WriteEvent(MidData, &DstPos, &CurDly, 0xB0 | MidChn, 0x20, 0x01);
}
//else
// WriteEvent(MidData, &DstPos, &CurDly, 0xB0 | MidChn, 0x20, 0x00);
}
else
{
TempByt = CurCmd;
}
WriteEvent(MidData, &DstPos, &CurDly, 0xC0 | MidChn, TempByt, 0x00);
CurDly += SongData[InPos + 0x01];
InPos += 0x03;
break;
case 0xE1: // Set Volume
if (FixVolume)
TempByt = DB2Mid(Lin2DB(SongData[InPos + 0x02]) * 0.5);
else
TempByt = SongData[InPos + 0x02];
WriteEvent(MidData, &DstPos, &CurDly, 0xB0 | MidChn, 0x07, TempByt);
InPos += 0x03;
break;
case 0xE2: // Set Pan
TempByt = PanBits2MidiPan(SongData[InPos + 0x02]);
WriteEvent(MidData, &DstPos, &CurDly, 0xB0 | MidChn, 0x0A, TempByt);
CurDly += SongData[InPos + 0x01];
InPos += 0x03;
break;
case 0xE4: // Pitch Bend
if (! PBRange)
{
// write Pitch Bend Range
PBRange = 16;
WriteEvent(MidData, &DstPos, &CurDly, 0xB0 | MidChn, 0x65, 0x00);
WriteEvent(MidData, &DstPos, &CurDly, 0xB0 | MidChn, 0x64, 0x00);
WriteEvent(MidData, &DstPos, &CurDly, 0xB0 | MidChn, 0x06, PBRange);
}
// Note: 32 steps = 1 semitone
TempSht = ReadLE16(&SongData[InPos + 0x02]);
TempSht *= (8192 / PBRange / 32);
TempSht += 0x2000;
WriteEvent(MidData, &DstPos, &CurDly, 0xE0 | MidChn, TempSht & 0x7F, TempSht >> 7);
CurDly += SongData[InPos + 0x01];
InPos += 0x04;
break;
case 0xFD: // Segment Return
//InPos += 0x01;
InPos = 0x0000;
break;
/*case 0xFF:
TrkEnd = true;
InPos += 0x01;
break;*/
default:
printf("Unknown event %02X on track %X at %04X\n", SongData[InPos + 0x00], CurTrk, InPos);
WriteEvent(MidData, &DstPos, &CurDly,
0xB0 | MidChn, 0x6E, CurCmd & 0x7F);
InPos += 0x01;
TrkEnd = true;
break;
}
}
}
for (TempByt = 0x00; TempByt < RunNoteCnt; TempByt ++)
{
if (RunNotes[TempByt].RemLen > CurDly)
CurDly = RunNotes[TempByt].RemLen;
}
WriteEvent(MidData, &DstPos, &CurDly, 0x7F, 0x00, 0x00); // flush all notes
WriteEvent(MidData, &DstPos, &CurDly, 0xFF, 0x2F, 0x00);
WriteBE32(&MidData[TrkBase - 0x04], DstPos - TrkBase); // write Track Length
}
MidLen = DstPos;
return 0x00;
}
static void WriteEvent(UINT8* Buffer, UINT32* Pos, UINT32* Delay, UINT8 Evt, UINT8 Val1, UINT8 Val2)
{
UINT8 CurNote;
UINT32 TempDly;
RUN_NOTE* TempNote;
while(RunNoteCnt)
{
// 1. Check if we're going beyond a note's timeout.
TempDly = *Delay + 1;
for (CurNote = 0x00; CurNote < RunNoteCnt; CurNote ++)
{
TempNote = &RunNotes[CurNote];
if (TempNote->RemLen < TempDly)
TempDly = TempNote->RemLen;
}
if (Evt != 0x7F)
{
if (TempDly >= *Delay)
break; // not beyond the timeout - do the event
}
else
{
// 7F is the 'flush all' command
if (TempDly > *Delay)
break;
}
// 2. advance all notes by X ticks
for (CurNote = 0x00; CurNote < RunNoteCnt; CurNote ++)
RunNotes[CurNote].RemLen -= (UINT16)TempDly;
(*Delay) -= TempDly;
// 3. send NoteOff for expired notes
for (CurNote = 0x00; CurNote < RunNoteCnt; CurNote ++)
{
TempNote = &RunNotes[CurNote];
if (! TempNote->RemLen) // turn note off, it going beyond the Timeout
{
WriteMidiValue(Buffer, Pos, TempDly);
TempDly = 0;
MidData[*Pos + 0x00] = 0x90 | TempNote->MidChn;
MidData[*Pos + 0x01] = TempNote->Note;
MidData[*Pos + 0x02] = 0x00;
*Pos += 0x03;
RunNoteCnt --;
if (RunNoteCnt)
*TempNote = RunNotes[RunNoteCnt];
CurNote --;
}
}
}
if (! (Evt & 0x80))
return;
WriteMidiValue(Buffer, Pos, *Delay);
if (*Delay)
{
for (CurNote = 0x00; CurNote < RunNoteCnt; CurNote ++)
RunNotes[CurNote].RemLen -= (UINT16)*Delay;
*Delay = 0x00;
}
switch(Evt & 0xF0)
{
case 0x80:
case 0x90:
case 0xA0:
case 0xB0:
case 0xE0:
MidData[*Pos + 0x00] = Evt;
MidData[*Pos + 0x01] = Val1;
MidData[*Pos + 0x02] = Val2;
*Pos += 0x03;
break;
case 0xC0:
case 0xD0:
MidData[*Pos + 0x00] = Evt;
MidData[*Pos + 0x01] = Val1;
*Pos += 0x02;
break;
case 0xF0: // for Meta Event: Track End
MidData[*Pos + 0x00] = Evt;
MidData[*Pos + 0x01] = Val1;
MidData[*Pos + 0x02] = Val2;
*Pos += 0x03;
break;
default:
break;
}
return;
}
static void WriteMidiValue(UINT8* Buffer, UINT32* Pos, UINT32 Value)
{
UINT8 ValSize;
UINT8* ValData;
UINT32 TempLng;
UINT32 CurPos;
ValSize = 0x00;
TempLng = Value;
do
{
TempLng >>= 7;
ValSize ++;
} while(TempLng);
ValData = &Buffer[*Pos];
CurPos = ValSize;
TempLng = Value;
do
{
CurPos --;
ValData[CurPos] = 0x80 | (TempLng & 0x7F);
TempLng >>= 7;
} while(TempLng);
ValData[ValSize - 1] &= 0x7F;
*Pos += ValSize;
return;
}
static UINT8 WriteFileData(UINT32 DataLen, const UINT8* Data, UINT8 SongID, const char* Extention)
{
char FileName[0x100];
FILE* hFile;
if (SongID == 0xFF)
sprintf(FileName, "%s.%s", OutFileBase, Extention);
else
sprintf(FileName, "%s_%02X.%s", OutFileBase, SongID, Extention);
hFile = fopen(FileName, "wb");
if (hFile == NULL)
{
printf("Error opening %s!\n", FileName);
return 0xFF;
}
fwrite(Data, 0x01, DataLen, hFile);
fclose(hFile);
return 0;
}
static double Lin2DB(UINT8 LinVol)
{
//return log(LinVol / 127.0) / log(2.0) * 6.0;
return log(LinVol / 127.0) * 8.65617024533378;
}
static UINT8 DB2Mid(double DB)
{
return (UINT8)(pow(10.0, DB / 40.0) * 0x7F + 0.5);
}
static UINT8 PanBits2MidiPan(UINT8 Pan)
{
switch(Pan & 0x03)
{
case 0x00: // no sound
return 0x3F;
case 0x01: // Right Channel
return 0x7F;
case 0x02: // Left Channel
return 0x00;
case 0x03: // Center
return 0x40;
}
return 0x3F;
}
static UINT16 ReadBE16(const UINT8* Data)
{
return (Data[0x00] << 8) | (Data[0x01] << 0);
}
static UINT32 ReadBE32(const UINT8* Data)
{
return (Data[0x00] << 24) | (Data[0x01] << 16) |
(Data[0x02] << 8) | (Data[0x03] << 0);
}
static UINT16 ReadLE16(const UINT8* Data)
{
return (Data[0x01] << 8) | (Data[0x00] << 0);
}
static void WriteBE32(UINT8* Buffer, UINT32 Value)
{
Buffer[0x00] = (Value & 0xFF000000) >> 24;
Buffer[0x01] = (Value & 0x00FF0000) >> 16;
Buffer[0x02] = (Value & 0x0000FF00) >> 8;
Buffer[0x03] = (Value & 0x000000FF) >> 0;
return;
}
static void WriteBE16(UINT8* Buffer, UINT16 Value)
{
Buffer[0x00] = (Value & 0xFF00) >> 8;
Buffer[0x01] = (Value & 0x00FF) >> 0;
return;
}
UINT8 DecompressArcOdyssey(const UINT8* ComprData, UINT32* RetDataLen, UINT8** RetData)
{
UINT32 CmpLen;
const UINT8* CmpData;
UINT32 DecLen;
UINT8* DecData;
CmpLen = ReadBE32(&ComprData[0x00]);
DecLen = ReadBE32(&ComprData[0x04]);
CmpData = &ComprData[0x08];
DecData = (UINT8*)malloc(DecLen + 0x10);
LZSS_Init(); // 01E7AE - Initialize Buffer Memory
LZSS_Decode(CmpLen, CmpData, DecLen, DecData); // 01E816 - Decompression
*RetData = DecData;
*RetDataLen = DecLen;
return 0x00;
}
#define N 4096 /* size of ring buffer */
#define F 18 /* upper limit for match_length */
#define THRESHOLD 2 /* encode string into position and length
if match_length is greater than this */
UINT8 text_buf[N + F - 1]; /* ring buffer of size N,
with extra F-1 bytes to facilitate string comparison */
static void LZSS_Init(void) // ported from the Arcus Odyssey ROM
{
UINT16 BufPos;
UINT16 RegD0;
UINT16 RegD1;
// Important Note: These are non-standard values and ARE used by the compressed data.
BufPos = 0x0000;
// 01E7B2 - A000..ACFF
for (RegD0 = 0x00; RegD0 < 0x100; RegD0 ++)
{
for (RegD1 = 0; RegD1 < 0x0D; RegD1 ++, BufPos ++)
text_buf[BufPos] = (UINT8)RegD0;
}
// 01E7D2 - AD00..ADFF
for (RegD0 = 0x00; RegD0 < 0x100; RegD0 ++, BufPos ++)
text_buf[BufPos] = (UINT8)RegD0;
// 01E7DE - AE00..AEFF
do
{
// TODO: Shouldn't I decrement D0 first?
text_buf[BufPos] = (UINT8)RegD0;
RegD0 --; BufPos ++;
} while(RegD0 > 0x00);
// 01E7E8 - AF00..AF7F
for (RegD0 = 0x00; RegD0 < 0x80; RegD0 ++, BufPos ++)
text_buf[BufPos] = 0x00;
// 01E800 - AF80..AFED
for (RegD0 = 0x00; RegD0 < 0x80 - F; RegD0 ++, BufPos ++)
text_buf[BufPos] = 0x20;
//RegD7 = 0x80; RegD6 = 0x00; RegA4 = 0xB000;
return;
}
void LZSS_Decode(UINT32 CmpLen, const UINT8* CmpData, UINT32 DecLen, UINT8* DecData) // from LZSS.C by Haruhiko Okumura
{
int i, j, k, r;
unsigned char c;
unsigned int flags;
UINT32 CmpPos;
UINT32 DecPos;
//for (i = 0; i < N - F; i++) text_buf[i] = ' ';
r = N - F; flags = 0;
CmpPos = 0;
DecPos = 0;
for ( ; ; ) {
if (((flags >>= 1) & 256) == 0) {
if (CmpPos >= CmpLen) break;
c = CmpData[CmpPos ++];
flags = c | 0xff00; /* uses higher byte cleverly */
} /* to count eight */
if (flags & 1) {
if (CmpPos >= CmpLen) break;
c = CmpData[CmpPos ++];
if (DecPos >= DecLen) break;
DecData[DecPos ++] = c;