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/*  DIGIGRAB grabs CD Audio data digitally to a file */

#include <stdio.h>
#include <stdlib.h>
#include <dos.h>
#include <string.h>
#include <alloc.h>

#define MULTIPLEX_INT   0x2f
#define INIT_MP_INT     0x1500
#define CDREQ_MP_INT    0x1510

#define STAT_HAS_AN_ERROR 0x8000
#define STAT_BUSY         0x0200
#define STAT_DONE         0x0100

int CDRomLoaded,CDRomDrive;

#define CD_READ_LONG         128
#define READ_IOCTL_COMMAND   3
#define WRITE_IOCTL_COMMAND  12

#define CD_STATUS_COMMAND     6

#define GET_AUDIO_DISKINFO    10
#define GET_AUDIO_TRACKINFO   11


#define ADDR_HSG 0
#define ADDR_RED 1

#define COOKED 0
#define RAW    1

#define FALSE  0
#define TRUE   1


static int StatusWord;

typedef struct {
   unsigned char ParamLength;
   unsigned char SubUnit;
   unsigned char CommandCode;
   unsigned int  Status;
   unsigned long Reserved1;
   unsigned long Reserved2;

   unsigned char AddressMode;
   unsigned long Transfaddr;
   unsigned int  Numsec;
   unsigned long Startsec;
   unsigned char Readmode;
   unsigned char Interlsiz;
   unsigned char Interlskip;
} ReadLongStru;


typedef struct {
   unsigned char ParamLength;
   unsigned char SubUnit;
   unsigned char CommandCode;
   unsigned int  Status;
   unsigned long Reserved1;
   unsigned long Reserved2;

   unsigned char Meddescr;
   unsigned long Transfaddr;
   unsigned int  Numbytes;
   unsigned int  Startsec;
   unsigned long volID;
} IOCTLStru;

typedef struct {
   unsigned char CntrlCode;
   unsigned char LowTrack;
   unsigned char HighTrack;
   unsigned long StartLeadout;
} DiskInfoStruc;

typedef struct {
   unsigned char CntrlCode;
   unsigned char Tracknum;
   unsigned long Startpoint;
   unsigned char TrackCtrlInfo;
} TrackInfoStruc;

ReadLongStru ReadLongBlock;
IOCTLStru IOCTLBlock;
DiskInfoStruc DiskInfoBlock;
TrackInfoStruc TrackInfoBlock[100];

unsigned long Red2HSG(unsigned long RedValue);

long LastSector;
int NumTracks;

int *buffer;

main(int argc, char *argv[])
{
unsigned long ssec,esec;
unsigned int nsec,secstograb,i,j,offs;
unsigned char filename[80];
FILE *outfp;

int Track,StartMin,StartSec,EndMin,EndSec,StartFrame,EndFrame;
float TempFloat;
char LocalBuffer[132];
char c = ':';
unsigned char skip;

		if (!CheckCD2F()){
			printf("MSCDEX NOT LOADED\n");
			exit(1);
		}

		GetDiskInfo();

		for(i = DiskInfoBlock.LowTrack; i <= DiskInfoBlock.HighTrack; i++)
			GetTrackInfo(i);

		ssec = atol(argv[1]);

		buffer = calloc(5000,1);

		outfp = fopen("1sect.raw","wb");

		ReadLong(ssec,1);
		while(ReadLongBlock.Status & STAT_HAS_AN_ERROR)
				ReadLong(ssec,1);

		fwrite(&buffer[i],2,1176,outfp);

		fclose(outfp);
		free(buffer);
}



CheckCD2F()
{
union REGS regs;

	regs.x.ax = INIT_MP_INT;
	int86(MULTIPLEX_INT,&regs,&regs);
	CDRomLoaded = regs.x.bx;
	CDRomDrive = regs.x.cx;
}

GetDiskInfo()
{
union REGS regs;
struct SREGS sregs;

	DiskInfoBlock.CntrlCode = GET_AUDIO_DISKINFO;

	IOCTLBlock.ParamLength = 13;
	IOCTLBlock.SubUnit     = 0;
	IOCTLBlock.CommandCode = READ_IOCTL_COMMAND;
	IOCTLBlock.Status      = 0;

	IOCTLBlock.Meddescr = 0;
	IOCTLBlock.Transfaddr =  (unsigned long)&DiskInfoBlock;
	IOCTLBlock.Numbytes = 7;
	IOCTLBlock.Startsec = 0;
	IOCTLBlock.volID = 0;

	regs.x.ax = CDREQ_MP_INT;
	regs.x.bx = FP_OFF(&IOCTLBlock);
	regs.x.cx = CDRomDrive;
	sregs.es  = FP_SEG(&IOCTLBlock);

	int86x(MULTIPLEX_INT,&regs,&regs,&sregs);

	return(IOCTLBlock.Status);
}

GetTrackInfo(unsigned char trk)
{
union REGS regs;
struct SREGS sregs;

	TrackInfoBlock[trk].CntrlCode = GET_AUDIO_TRACKINFO;
	TrackInfoBlock[trk].Tracknum = trk;

	IOCTLBlock.ParamLength = 13;
	IOCTLBlock.SubUnit     = 0;
	IOCTLBlock.CommandCode = READ_IOCTL_COMMAND;
	IOCTLBlock.Status      = 0;

	IOCTLBlock.Meddescr = 0;
	IOCTLBlock.Transfaddr =  (unsigned long)&(TrackInfoBlock[trk]);
	IOCTLBlock.Numbytes = 7;
	IOCTLBlock.Startsec = 0;
	IOCTLBlock.volID = 0;

	regs.x.ax = CDREQ_MP_INT;
	regs.x.bx = FP_OFF(&IOCTLBlock);
	regs.x.cx = CDRomDrive;
	sregs.es  = FP_SEG(&IOCTLBlock);

	int86x(MULTIPLEX_INT,&regs,&regs,&sregs);

	return(IOCTLBlock.Status);
}


ReadLong(unsigned long SSec,unsigned int numsecs)
{
union REGS regs;
struct SREGS sregs;

	ReadLongBlock.ParamLength = 13;
	ReadLongBlock.SubUnit     = 0;
	ReadLongBlock.CommandCode = CD_READ_LONG;
	ReadLongBlock.Status      = 0;
	ReadLongBlock.AddressMode = ADDR_HSG;

	ReadLongBlock.Transfaddr = (int far*) buffer;
	ReadLongBlock.Numsec     = numsecs;
	ReadLongBlock.Startsec   = SSec;
	ReadLongBlock.Readmode   = RAW;
	ReadLongBlock.Interlsiz  = 0;
	ReadLongBlock.Interlskip = 0;

	regs.x.ax = CDREQ_MP_INT;
	regs.x.bx = FP_OFF(&ReadLongBlock);
	regs.x.cx = CDRomDrive;
	sregs.es  = FP_SEG(&ReadLongBlock);

	int86x(MULTIPLEX_INT,&regs,&regs,&sregs);

	return(ReadLongBlock.Status);
}


unsigned long Red2HSG(unsigned long RedValue)
{
unsigned long Mins;
unsigned long Secs;
unsigned long PlusFrames;

	PlusFrames = RedValue & 0x000000ffL;

	Secs = ((RedValue & 0x0000ff00L) >> 8);

	Mins = ((RedValue & 0x00ff0000L) >> 16);

	return((Mins*60+Secs)*75+PlusFrames);
}
.

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