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/***************************************************************************
PlugCD.h
CDDeviceInterface
Created by Gil Pedersen on Fri July 18 2003.
Copyright (c) 2003,2004 Gil Pedersen.
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. See also the license.txt file for *
* additional informations. *
* *
***************************************************************************/
#ifndef _PLUGCD_H_
#define _PLUGCD_H_
#include <stdio.h>
#define CHAR_LEN 256
// 2352 is a sector size
#define BUFFER_SECTORS 50
#define BUFFER_SIZE BUFFER_SECTORS*2352
#define BZIP_BUFFER_SECTORS 10
// 74 minutes * 60 sex/min * 75 frames/sec * 96 bytes needed per frame
#define TOTAL_CD_LENGTH 74*60*75
#define BYTES_PER_SUBCHANNEL_FRAME 96
#define MAX_SUBCHANNEL_DATA TOTAL_CD_LENGTH*BYTES_PER_SUBCHANNEL_FRAME
typedef struct {
char dn[128];
char fn[128];
} cd_conf;
cd_conf CDConfiguration;
int rc;
enum TrackType
{
unknown, Mode1, Mode2, Audio, Pregap = 0x80
};
typedef struct
{
enum TrackType type;
char num;
unsigned char start[3];
unsigned char end[3];
} Track;
struct
{
int cd;
FILE* cdda;
int numtracks;
long bufferPos;
long bufferSize;
long sector;
long sectorType;
long status;
Track* tl;
unsigned char buffer[BUFFER_SIZE];
} CD;
void CDDAclose(void);
// function headers for cdreader.c
char getNumTracks();
void seekSector(const unsigned char m, const unsigned char s, const unsigned char f);
unsigned char* getSector();
void newCD(const char * filename);
void readit();
// subtracts two times in integer format (non-BCD) -> l - r = a
#define sub(l, r, a)\
a[1] = 0;\
a[0] = 0;\
a[2] = l[2] - r[2];\
if ((char)a[2] < 0)\
{\
a[2] += 75;\
a[1] -= 1;\
}\
a[1] += l[1] - r[1];\
if ((char)a[1] < 0)\
{\
a[1] += 60;\
a[0] -= 1;\
}\
a[0] += l[0] - r[0];\
// converts a time like 17:61:00 to 18:01:00
#define normalizeTime(c)\
while(c[2] > 75)\
{\
c[2] -= 75;\
c[1] += 1;\
}\
while(c[1] > 60)\
{\
c[1] -= 60;\
c[0] += 1;\
}
// converts uchar in c to BCD character
#define intToBCD(c) (unsigned char)((c%10) | ((c/10)<<4))
// converts BCD number in c to uchar
#define BCDToInt(c) (unsigned char)((c & 0x0F) + 10 * ((c & 0xF0) >> 4))
#endif
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