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optvgmrf.c
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// optvgmrf.c - VGM RF-PCM Optimizer
//
// TODO:
// - implement UnOpt
// - optimize output (smaller blocks, expand block writes)
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <zlib.h>
#include "stdtype.h"
#include "stdbool.h"
#include "VGMFile.h"
#include "common.h"
static bool OpenVGMFile(const char* FileName);
static void WriteVGMFile(const char* FileName);
static void MergePCMData(void);
static UINT32 ReadConsecutiveMemWrites(UINT8 RFMode);
static void EnumeratePCMData(void);
static bool CompareData(UINT32 DataLen, const UINT8* DataA,
const UINT8* DataB);
static void RewriteVGMData(void);
#define RF5C68_MODE 0x00
#define RF5C164_MODE 0x01
#define SCSP_MODE 0x02
#define RFDATA_BLOCKS 0x03
// sometimes the chip races with the memory writes, so I tried different methods
#define BP_FRONT 0x00 // works best (some single samples are still incorrect)
// I should be able to get around that by simulating that stream
#define BP_BACK 0x01 // works worst (audible bugs)
#define BP_MIDDLE 0x02 // works average (some audible bugs)
#define BLOCK_POS BP_FRONT
typedef struct rfpcm_block_data
{
UINT8 Mode;
UINT32 DataSize;
UINT8* Data;
UINT32 DBPos; // Database Position
UINT32 UsageCounter;
} RF_BLK_DATA;
typedef struct block_in_file_list
{
UINT32 BlockID;
UINT32 FilePos;
UINT32 StartAddr;
UINT32 DataSize;
} IN_FILE_LIST;
typedef struct rfpcm_ram_data
{
UINT16 BankReg;
bool FirstBnkWrt;
UINT32 DataLen;
UINT32 RAMStart;
UINT32 RAMSkip;
UINT32 RAMSize;
UINT8* PCMRam;
} RF_CHIP_DATA;
VGM_HEADER VGMHead;
UINT32 VGMDataLen;
UINT8* VGMData;
UINT32 VGMPos;
INT32 VGMSmplPos;
UINT8* DstData;
UINT32 DstDataLen;
char FileBase[0x100];
UINT32 DataSizeA;
UINT32 DataSizeB;
bool CancelFlag;
UINT8 OptMode;
RF_CHIP_DATA RF_RData[RFDATA_BLOCKS];
UINT32 RFBlkAlloc;
UINT32 RFBlkCount;
RF_BLK_DATA* RFBlock;
UINT32 InFileAlloc;
UINT32 InFileCount;
IN_FILE_LIST* InFileList;
int main(int argc, char* argv[])
{
int argbase;
int ErrVal;
char FileName[0x100];
printf("VGM RF-PCM Optimizer\n--------------------\n\n");
ErrVal = 0;
argbase = 1;
printf("File Name:\t");
if (argc <= argbase + 0)
{
ReadFilename(FileName, sizeof(FileName));
}
else
{
strcpy(FileName, argv[argbase + 0]);
printf("%s\n", FileName);
}
if (! strlen(FileName))
return 1;
if (! OpenVGMFile(FileName))
{
printf("Error opening the file!\n");
ErrVal = 1;
goto EndProgram;
}
printf("\n");
DstData = NULL;
if (VGMHead.lngVersion < 0x00000151)
{
printf("VGM Version %X.%02X!? Are kidding me??\n",
VGMHead.lngVersion >> 8, VGMHead.lngVersion & 0xFF);
ErrVal = 2;
goto BreakProgress;
}
if (! VGMHead.lngHzRF5C68 && ! VGMHead.lngHzRF5C164 && ! VGMHead.lngHzSCSP)
{
printf("No RF-PCM chips used!\n");
ErrVal = 2;
goto BreakProgress;
}
CancelFlag = false;
OptMode = 0x00;
printf("Step 1: Merge single memory writes into larger blocks ...\n");
MergePCMData();
if (CancelFlag)
goto BreakProgress;
switch(OptMode)
{
case 0x00: // 1 PCM block - remove unused space
// this feature was planned and scrapped, because it's easier to implement in vgm_sro
printf("This tool can only optimize PCM streams and this vgm has no PCM stream.\n");
printf("You should try the VGM Sample-ROM Optimizer for further compression.\n");
break;
case 0x01: // PCM stream - optimize this way
//break;
// Swap Pointers (I love C for this)
free(VGMData);
VGMData = DstData;
DstData = NULL;
printf("Step 2: Generate Block Data ...\n");
EnumeratePCMData();
if (CancelFlag)
goto BreakProgress;
printf("Step 3: Rewrite VGM with PCM database ...\n");
RewriteVGMData();
break;
}
printf("Data Compression: %u -> %u (%.1f %%)\n",
DataSizeA, DataSizeB, 100.0f * DataSizeB / DataSizeA);
if (DataSizeB < DataSizeA)
{
if (argc > argbase + 1)
strcpy(FileName, argv[argbase + 1]);
else
strcpy(FileName, "");
if (FileName[0] == '\0')
{
strcpy(FileName, FileBase);
strcat(FileName, "_optimized.vgm");
}
WriteVGMFile(FileName);
}
BreakProgress:
free(VGMData);
free(DstData);
EndProgram:
DblClickWait(argv[0]);
return ErrVal;
}
static bool OpenVGMFile(const char* FileName)
{
gzFile hFile;
UINT32 CurPos;
UINT32 TempLng;
char* TempPnt;
hFile = gzopen(FileName, "rb");
if (hFile == NULL)
return false;
gzseek(hFile, 0x00, SEEK_SET);
gzread(hFile, &TempLng, 0x04);
if (TempLng != FCC_VGM)
goto OpenErr;
gzseek(hFile, 0x00, SEEK_SET);
gzread(hFile, &VGMHead, sizeof(VGM_HEADER));
ZLIB_SEEKBUG_CHECK(VGMHead);
// Header preperations
if (VGMHead.lngVersion < 0x00000150)
{
VGMHead.lngDataOffset = 0x00000000;
}
if (VGMHead.lngVersion < 0x00000151)
{
VGMHead.lngHzSPCM = 0x0000;
VGMHead.lngSPCMIntf = 0x00000000;
// all others are zeroed by memset
}
// relative -> absolute addresses
VGMHead.lngEOFOffset += 0x00000004;
if (VGMHead.lngGD3Offset)
VGMHead.lngGD3Offset += 0x00000014;
if (VGMHead.lngLoopOffset)
VGMHead.lngLoopOffset += 0x0000001C;
if (! VGMHead.lngDataOffset)
VGMHead.lngDataOffset = 0x0000000C;
VGMHead.lngDataOffset += 0x00000034;
CurPos = VGMHead.lngDataOffset;
if (VGMHead.lngVersion < 0x00000151)
CurPos = 0x40;
TempLng = sizeof(VGM_HEADER);
if (TempLng > CurPos)
TempLng -= CurPos;
else
TempLng = 0x00;
memset((UINT8*)&VGMHead + CurPos, 0x00, TempLng);
// Read Data
VGMDataLen = VGMHead.lngEOFOffset;
VGMData = (UINT8*)malloc(VGMDataLen);
if (VGMData == NULL)
goto OpenErr;
gzseek(hFile, 0x00, SEEK_SET);
gzread(hFile, VGMData, VGMDataLen);
gzclose(hFile);
strcpy(FileBase, FileName);
TempPnt = strrchr(FileBase, '.');
if (TempPnt != NULL)
*TempPnt = 0x00;
return true;
OpenErr:
gzclose(hFile);
return false;
}
static void WriteVGMFile(const char* FileName)
{
FILE* hFile;
hFile = fopen(FileName, "wb");
fwrite(DstData, 0x01, DstDataLen, hFile);
fclose(hFile);
printf("File written.\n");
return;
}
static void WritePCMDataBlk(UINT32* DstPos, const UINT8 BlkType, const UINT32 DataLen,
const UINT32 DataStart)
{
const UINT8 DBLK_TYPES[RFDATA_BLOCKS] = {0xC0, 0xC1, 0xE0};
UINT32 DBlkLen;
UINT8 DBlkType;
const UINT8* Data;
Data = RF_RData[BlkType].PCMRam + DataStart;
DBlkType = DBLK_TYPES[BlkType];
DstData[*DstPos + 0x00] = 0x67;
DstData[*DstPos + 0x01] = 0x66;
DstData[*DstPos + 0x02] = DBlkType;
if (! (DBlkType & 0x20))
{
DBlkLen = DataLen + 0x02;
memcpy(&DstData[*DstPos + 0x03], &DBlkLen, 0x04);
memcpy(&DstData[*DstPos + 0x07], &DataStart, 0x02);
memcpy(&DstData[*DstPos + 0x09], Data, DataLen);
}
else
{
DBlkLen = DataLen + 0x04;
memcpy(&DstData[*DstPos + 0x03], &DBlkLen, 0x04);
memcpy(&DstData[*DstPos + 0x07], &DataStart, 0x04);
memcpy(&DstData[*DstPos + 0x0B], Data, DataLen);
}
*DstPos += 0x07 + DBlkLen;
return;
}
static void MergePCMData(void)
{
UINT32 DstPos;
UINT8 Command;
UINT8 TempByt;
UINT16 TempSht;
UINT32 TempLng;
UINT32 BlockLen;
UINT32 DataLen;
#ifdef WIN32
UINT32 CmdTimer;
char TempStr[0x80];
char MinSecStr[0x80];
#endif
UINT32 CmdLen;
bool StopVGM;
bool WriteEvent;
UINT32 NewLoopS;
RF_CHIP_DATA* TempRFD;
UINT8 WarningFlags;
UINT32 WriteLen;
UINT32 BlkFound;
UINT8 BlkType;
DstData = (UINT8*)malloc(VGMDataLen + 0x10000); // some additional buffer for split data blocks
VGMPos = VGMHead.lngDataOffset;
DstPos = VGMHead.lngDataOffset;
VGMSmplPos = 0;
NewLoopS = 0x00;
memcpy(DstData, VGMData, VGMPos); // Copy Header
memset(RF_RData, 0x00, sizeof(RF_CHIP_DATA) * RFDATA_BLOCKS);
RF_RData[RF5C68_MODE].RAMSize = 0x10000; // 64 KB
RF_RData[RF5C164_MODE].RAMSize = 0x10000; // 64 KB
RF_RData[SCSP_MODE].RAMSize = 0x80000; // 512 KB
for (TempByt = 0x00; TempByt < RFDATA_BLOCKS; TempByt ++)
{
RF_RData[TempByt].PCMRam = (UINT8*)malloc(RF_RData[TempByt].RAMSize);
RF_RData[TempByt].FirstBnkWrt = true;
}
#ifdef WIN32
CmdTimer = 0;
#endif
WarningFlags = 0x00;
StopVGM = false;
BlkFound = 0x00;
while(VGMPos < VGMHead.lngEOFOffset)
{
CmdLen = 0x00;
Command = VGMData[VGMPos + 0x00];
WriteEvent = true;
if (Command >= 0x70 && Command <= 0x8F)
{
switch(Command & 0xF0)
{
case 0x70:
TempSht = (Command & 0x0F) + 0x01;
VGMSmplPos += TempSht;
break;
case 0x80:
TempSht = Command & 0x0F;
VGMSmplPos += TempSht;
break;
}
CmdLen = 0x01;
}
else
{
switch(Command)
{
case 0x66: // End Of File
CmdLen = 0x01;
StopVGM = true;
break;
case 0x62: // 1/60s delay
TempSht = 735;
VGMSmplPos += TempSht;
CmdLen = 0x01;
break;
case 0x63: // 1/50s delay
TempSht = 882;
VGMSmplPos += TempSht;
CmdLen = 0x01;
break;
case 0x61: // xx Sample Delay
memcpy(&TempSht, &VGMData[VGMPos + 0x01], 0x02);
VGMSmplPos += TempSht;
CmdLen = 0x03;
break;
case 0x50: // SN76496 write
case 0x4F: // GG Stereo
CmdLen = 0x02;
break;
case 0x51: // YM2413 write
case 0x52: // YM2612 write port 0
case 0x53: // YM2612 write port 1
case 0x54: // YM2151 write
case 0x55: // YM2203
case 0x56: // YM2608 write port 0
case 0x57: // YM2608 write port 1
case 0x58: // YM2610 write port 0
case 0x59: // YM2610 write port 1
case 0x5A: // YM3812 write
case 0x5B: // YM3526 write
case 0x5C: // Y8950 write
case 0x5E: // YMF262 write port 0
case 0x5F: // YMF262 write port 1
case 0x5D: // YMZ280B write
CmdLen = 0x03;
break;
case 0x67: // PCM Data Stream
TempByt = VGMData[VGMPos + 0x02];
memcpy(&BlockLen, &VGMData[VGMPos + 0x03], 0x04);
BlockLen &= 0x7FFFFFFF;
CmdLen = 0x07 + BlockLen;
if ((TempByt & 0xC0) != 0xC0)
break;
if (TempByt == 0xC0)
BlkType = RF5C68_MODE;
else if (TempByt == 0xC1)
BlkType = RF5C164_MODE;
else if (TempByt == 0xE0)
BlkType = SCSP_MODE;
else
break;
BlkFound ++;
TempRFD = &RF_RData[BlkType];
if (! TempRFD->RAMSkip)
{
TempRFD->DataLen = ReadConsecutiveMemWrites(BlkType);
if (TempRFD->DataLen > 0x01)
{
TempRFD->RAMSkip = TempRFD->DataLen;
if (! (TempByt & 0x20))
{
memcpy(&TempSht, &VGMData[VGMPos + 0x07], 0x02);
TempSht += TempRFD->BankReg;
TempLng = TempSht;
}
else
{
memcpy(&TempLng, &VGMData[VGMPos + 0x07], 0x04);
}
TempRFD->RAMStart = TempLng;
if (BLOCK_POS == BP_FRONT)
{
while(TempRFD->DataLen)
{
if (TempRFD->DataLen > 0x1000)
WriteLen = 0x1000;
else
WriteLen = TempRFD->DataLen;
WritePCMDataBlk(&DstPos, BlkType, WriteLen, TempLng);
TempLng += WriteLen;
TempRFD->DataLen -= WriteLen;
}
}
}
}
if (TempRFD->RAMSkip)
{
if (! (TempByt & 0x20))
DataLen = BlockLen - 0x02;
else
DataLen = BlockLen - 0x04;
if ((BLOCK_POS == BP_BACK && ! TempRFD->RAMSkip) ||
(BLOCK_POS == BP_MIDDLE &&
(TempRFD->RAMSkip >= TempRFD->DataLen / 2 &&
TempRFD->RAMSkip - DataLen < TempRFD->DataLen / 2)))
{
TempSht = TempRFD->RAMStart;
while(TempRFD->DataLen)
{
if (TempRFD->DataLen > 0x1000)
WriteLen = 0x1000;
else
WriteLen = TempRFD->DataLen;
WritePCMDataBlk(&DstPos, BlkType, WriteLen, TempSht);
TempSht += (UINT16)WriteLen;
TempRFD->DataLen -= WriteLen;
}
}
WriteEvent = false;
TempRFD->RAMSkip -= DataLen;
}
break;
case 0xE0: // Seek to PCM Data Bank Pos
CmdLen = 0x05;
break;
case 0xC0: // Sega PCM memory write
CmdLen = 0x04;
break;
case 0xB0: // RF5C68 register write
case 0xB1: // RF5C164 register write
CmdLen = 0x03;
if (VGMData[VGMPos + 0x01] == 0x07 && ! (VGMData[VGMPos + 0x02] & 0x40))
{
if (Command == 0xB0)
TempRFD = &RF_RData[RF5C68_MODE];
else if (Command == 0xB1)
TempRFD = &RF_RData[RF5C164_MODE];
else
TempRFD = NULL;
// Bank Select
TempRFD->BankReg = (VGMData[VGMPos + 0x02] & 0x0F) << 12;
// write Bank Select just one time, the memory write includes all
// neccessary data
if (TempRFD->FirstBnkWrt)
{
VGMData[VGMPos + 0x02] &= ~0x0F;
WriteEvent = true;
TempRFD->FirstBnkWrt = false;
}
else
{
WriteEvent = false;
}
}
break;
case 0xC1: // RF5C68 memory write
case 0xC2: // RF5C164 memory write
CmdLen = 0x04;
if (Command == 0xC1)
BlkType = RF5C68_MODE;
else if (Command == 0xC2)
BlkType = RF5C164_MODE;
/*else
{
BlkType = 0xFF;
TempRFD = NULL;
}*/
TempRFD = &RF_RData[BlkType];
BlkFound ++;
if (! TempRFD->RAMSkip)
{
TempRFD->DataLen = ReadConsecutiveMemWrites(BlkType);
if (TempRFD->DataLen > 0x01)
{
TempRFD->RAMSkip = TempRFD->DataLen;
memcpy(&TempSht, &VGMData[VGMPos + 0x01], 0x02);
TempRFD->RAMStart = TempRFD->BankReg + TempSht;
if (BLOCK_POS == BP_FRONT)
{
WritePCMDataBlk(&DstPos, BlkType, TempRFD->DataLen,
TempRFD->RAMStart);
}
}
else if (! (WarningFlags & 0x01))
{
WarningFlags |= 0x01;
printf("\t\t\t\t\t\t\t\t\r");
#ifdef WIN32
CmdTimer = 0;
#endif
printf("Warning! Single Memory Writes left!\n");
}
}
if (TempRFD->RAMSkip)
{
if ((BLOCK_POS == BP_BACK && ! TempRFD->RAMSkip) ||
(BLOCK_POS == BP_MIDDLE && TempRFD->RAMSkip * 2 == TempRFD->DataLen))
{
WritePCMDataBlk(&DstPos, BlkType, TempRFD->DataLen,
TempRFD->RAMStart);
}
WriteEvent = false;
TempRFD->RAMSkip --;
}
break;
case 0x68: // PCM RAM write
CmdLen = 0x0C;
//break;
printf("\t\t\t\t\t\t\t\t\r");
#ifdef WIN32
CmdTimer = 0;
#endif
printf("VGM already optimized!\n");
CancelFlag = true;
return;
default:
switch(Command & 0xF0)
{
case 0x30:
case 0x40:
CmdLen = 0x02;
break;
case 0x50:
case 0xA0:
case 0xB0:
CmdLen = 0x03;
break;
case 0xC0:
case 0xD0:
CmdLen = 0x04;
break;
case 0xE0:
case 0xF0:
CmdLen = 0x05;
break;
default:
printf("\t\t\t\t\t\t\t\t\r");
#ifdef WIN32
CmdTimer = 0;
#endif
printf("Unknown Command: %X\n", Command);
CmdLen = 0x01;
//StopVGM = true;
break;
}
break;
}
}
if (VGMPos == VGMHead.lngLoopOffset)
NewLoopS = DstPos;
if (WriteEvent)
{
memcpy(&DstData[DstPos], &VGMData[VGMPos], CmdLen);
DstPos += CmdLen;
}
VGMPos += CmdLen;
if (StopVGM)
break;
#ifdef WIN32
if (CmdTimer < GetTickCount())
{
PrintMinSec(VGMSmplPos, MinSecStr);
PrintMinSec(VGMHead.lngTotalSamples, TempStr);
TempLng = VGMPos - VGMHead.lngDataOffset;
BlockLen = VGMHead.lngEOFOffset - VGMHead.lngDataOffset;
printf("%04.3f %% - %s / %s (%08X / %08X) ...\r", (float)TempLng / BlockLen * 100,
MinSecStr, TempStr, VGMPos, VGMHead.lngEOFOffset);
CmdTimer = GetTickCount() + 200;
}
#endif
}
printf("\t\t\t\t\t\t\t\t\r");
DataSizeA = VGMPos - VGMHead.lngDataOffset;
if (VGMHead.lngLoopOffset)
{
VGMHead.lngLoopOffset = NewLoopS;
if (! NewLoopS)
printf("Error! Failed to relocate Loop Point!\n");
else
NewLoopS -= 0x1C;
memcpy(&DstData[0x1C], &NewLoopS, 0x04);
}
if (VGMHead.lngGD3Offset)
{
VGMPos = VGMHead.lngGD3Offset;
memcpy(&TempLng, &VGMData[VGMPos + 0x00], 0x04);
if (TempLng == FCC_GD3)
{
memcpy(&CmdLen, &VGMData[VGMPos + 0x08], 0x04);
CmdLen += 0x0C;
VGMHead.lngGD3Offset = DstPos;
TempLng = VGMHead.lngGD3Offset - 0x14;
memcpy(&DstData[0x14], &TempLng, 0x04);
memcpy(&DstData[DstPos], &VGMData[VGMPos], CmdLen);
DstPos += CmdLen;
}
}
DstDataLen = DstPos;
VGMHead.lngEOFOffset = DstDataLen;
TempLng = VGMHead.lngEOFOffset - 0x04;
memcpy(&DstData[0x04], &TempLng, 0x04);
OptMode = (BlkFound == 0x01) ? 0x00 : 0x01;
for (TempByt = 0x00; TempByt < RFDATA_BLOCKS; TempByt ++)
{
free(RF_RData[TempByt].PCMRam);
RF_RData[TempByt].PCMRam = NULL;
}
return;
}
static UINT32 ReadConsecutiveMemWrites(UINT8 RFMode)
{
RF_CHIP_DATA* TempRFD;
UINT32 TmpPos;
UINT32 PCMPos;
UINT32 DataLen;
UINT8 Command;
UINT8 TempByt;
UINT16 TempSht;
UINT32 TempLng;
UINT32 BlkLen;
UINT32 CmdLen;
bool StopVGM;
UINT16 BankReg; // this function mustn't change the global one
UINT8 BlkType;
TempRFD = &RF_RData[RFMode];
TmpPos = VGMPos;
BankReg = TempRFD->BankReg;
PCMPos = 0xFFFFFFFF;
DataLen = 0x00;
StopVGM = false;
while(TmpPos < VGMHead.lngEOFOffset)
{
CmdLen = 0x00;
Command = VGMData[TmpPos + 0x00];
if (Command >= 0x70 && Command <= 0x8F)
{
switch(Command & 0xF0)
{
case 0x70:
TempSht = (Command & 0x0F) + 0x01;
break;
case 0x80:
TempSht = Command & 0x0F;
break;
}
CmdLen = 0x01;
}
else
{
switch(Command)
{
case 0x66: // End Of File
CmdLen = 0x01;
StopVGM = true;
break;
case 0x62: // 1/60s delay
CmdLen = 0x01;
break;
case 0x63: // 1/50s delay
CmdLen = 0x01;
break;
case 0x61: // xx Sample Delay
CmdLen = 0x03;
break;
case 0x50: // SN76496 write
CmdLen = 0x02;
break;
case 0x51: // YM2413 write
CmdLen = 0x03;
break;
case 0x52: // YM2612 write port 0
case 0x53: // YM2612 write port 1
CmdLen = 0x03;
break;
case 0x67: // PCM Data Stream
TempByt = VGMData[TmpPos + 0x02];
memcpy(&BlkLen, &VGMData[TmpPos + 0x03], 0x04);
BlkLen &= 0x7FFFFFFF;
CmdLen = 0x07 + BlkLen;
if ((TempByt & 0xC0) != 0xC0)
break;
if (TempByt == 0xC0)
BlkType = RF5C68_MODE;
else if (TempByt == 0xC1)
BlkType = RF5C164_MODE;
else if (TempByt == 0xE0)
BlkType = SCSP_MODE;
else
break;
if (BlkType != RFMode)
break;
if (! (TempByt & 0x20))
{
memcpy(&TempSht, &VGMData[TmpPos + 0x07], 0x02);
TempSht += BankReg;
TempLng = TempSht;
BlkLen -= 0x02;
}
else
{
memcpy(&TempLng, &VGMData[TmpPos + 0x07], 0x04);
BlkLen -= 0x04;
}
if (PCMPos == 0xFFFFFFFF)
PCMPos = TempLng;
if (TempLng != PCMPos)
{
StopVGM = true;
break;
}
if (BlkLen > TempRFD->RAMSize)
BlkLen = TempRFD->RAMSize;
if (! (TempByt & 0x20))
memcpy(&TempRFD->PCMRam[PCMPos], &VGMData[TmpPos + 0x09], BlkLen);
else
memcpy(&TempRFD->PCMRam[PCMPos], &VGMData[TmpPos + 0x0B], BlkLen);
PCMPos += BlkLen;
DataLen += BlkLen;
break;
case 0xE0: // Seek to PCM Data Bank Pos
CmdLen = 0x05;
break;
case 0x4F: // GG Stereo
CmdLen = 0x02;
break;
case 0x54: // YM2151 write
CmdLen = 0x03;
break;
case 0xC0: // Sega PCM memory write
CmdLen = 0x04;
break;
case 0xB0: // RF5C68 register write
case 0xB1: // RF5C164 register write
CmdLen = 0x03;
if ((Command == 0xB0 && RFMode != RF5C68_MODE) ||
(Command == 0xB1 && RFMode != RF5C164_MODE))
break;
// end block as soon as another RF register write occours
// In theory one could make larger blocks, but that may be unsafe and cause
// race conditions with rewritten Sample Start/Loop registers.
StopVGM = true;
if (VGMData[TmpPos + 0x01] == 0x07 && ! (VGMData[TmpPos + 0x02] & 0x40))
{
// Bank Select
//StopVGM = true;
BankReg = (VGMData[TmpPos + 0x02] & 0x0F) << 12;
}
break;
case 0xC1: // RF5C68 memory write
case 0xC2: // RF5C164 memory write
CmdLen = 0x04;
if ((Command == 0xC1 && RFMode != RF5C68_MODE) ||
(Command == 0xC2 && RFMode != RF5C164_MODE))
break;
memcpy(&TempSht, &VGMData[TmpPos + 0x01], 0x02);
TempSht += BankReg;
if (PCMPos == 0xFFFFFFFF)
PCMPos = TempSht;
if (TempSht != PCMPos)
{
StopVGM = true;
break;
}
TempRFD->PCMRam[PCMPos] = VGMData[TmpPos + 0x03];
PCMPos ++;
DataLen ++;
//if (! (PCMPos & 0xFFF))
// StopVGM = true;
break;
case 0xC5: // SCSP write
CmdLen = 0x04;
if (RFMode != SCSP_MODE)
break;
// not breaking on SCSP register seems to actually work slightly better
// TODO: Improve sample block search algorithm so that partial matches can be found,
// which should make it work better with StopVGM=true here.
//StopVGM = true;
break;
case 0x55: // YM2203
CmdLen = 0x03;
break;
case 0x56: // YM2608 write port 0
case 0x57: // YM2608 write port 1
CmdLen = 0x03;
break;
case 0x58: // YM2610 write port 0
case 0x59: // YM2610 write port 1
CmdLen = 0x03;
break;
case 0x5A: // YM3812 write
CmdLen = 0x03;
break;
case 0x5B: // YM3526 write
CmdLen = 0x03;
break;
case 0x5C: // Y8950 write
CmdLen = 0x03;
break;
case 0x5E: // YMF262 write port 0
case 0x5F: // YMF262 write port 1
CmdLen = 0x03;
break;
case 0x5D: // YMZ280B write
CmdLen = 0x03;
break;
case 0x68: // PCM RAM write
CmdLen = 0x0C;
break;
default:
switch(Command & 0xF0)
{
case 0x30:
case 0x40:
CmdLen = 0x02;
break;
case 0x50:
case 0xA0:
case 0xB0:
CmdLen = 0x03;
break;
case 0xC0:
case 0xD0:
CmdLen = 0x04;
break;
case 0xE0:
case 0xF0:
CmdLen = 0x05;
break;
default:
//printf("Unknown Command: %X\n", Command);
CmdLen = 0x01;
//StopVGM = true;
break;
}
break;
}
}
TmpPos += CmdLen;
if (StopVGM || PCMPos >= TempRFD->RAMSize)
break;
}
return DataLen;
}
static void EnumeratePCMData(void)
{
UINT8 Command;
UINT8 TempByt;
UINT16 TempSht;
UINT32 TempLng;
UINT32 BlockLen;
UINT32 DataLen;
#ifdef WIN32
UINT32 CmdTimer;
char TempStr[0x80];
char MinSecStr[0x80];
#endif
UINT32 CmdLen;
bool StopVGM;
UINT32 CurBlk;
bool FoundBlk;
RF_BLK_DATA* TempBlk;
IN_FILE_LIST* TempLst;
UINT32 BlkUsage;
UINT32 BlkSize;
UINT32 BlkSngUse;
UINT8 BlkType;
UINT32 BlkStart;
const UINT8* BlkData;
RFBlkAlloc = 0x40; // usually there are only few blocks ...
RFBlock = (RF_BLK_DATA*)malloc(RFBlkAlloc * sizeof(RF_BLK_DATA));
RFBlkCount = 0x00;
InFileAlloc = 0x8000; // ... but block usage is very high
InFileList = (IN_FILE_LIST*)malloc(InFileAlloc * sizeof(IN_FILE_LIST));
InFileCount = 0x00;
BlkUsage = BlkSize = 0x00;
VGMPos = VGMHead.lngDataOffset;
VGMSmplPos = 0;
#ifdef WIN32
CmdTimer = 0;
#endif