📄 cd.c
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//-------------------------------------------------------------------------
/*
Copyright (C) 1996, 2003 - 3D Realms Entertainment
This file is NOT part of Duke Nukem 3D version 1.5 - Atomic EditionHowever, it is either an older version of a file that is, or issome test code written during the development of Duke Nukem 3D.This file is provided purely for educational interest.Duke Nukem 3D 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.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Prepared for public release: 03/21/2003 - Charlie Wiederhold, 3D Realms
*/
//-------------------------------------------------------------------------
#include <dpmi.h>
#include "quakedef.h"
#include "dosisms.h"
extern cvar_t bgmvolume;
#define ADDRESS_MODE_HSG 0
#define ADDRESS_MODE_RED_BOOK 1
#define STATUS_ERROR_BIT 0x8000
#define STATUS_BUSY_BIT 0x0200
#define STATUS_DONE_BIT 0x0100
#define STATUS_ERROR_MASK 0x00ff
#define ERROR_WRITE_PROTECT 0
#define ERROR_UNKNOWN_UNIT 1
#define ERROR_DRIVE_NOT_READY 2
#define ERROR_UNKNOWN_COMMAND 3
#define ERROR_CRC_ERROR 4
#define ERROR_BAD_REQUEST_LEN 5
#define ERROR_SEEK_ERROR 6
#define ERROR_UNKNOWN_MEDIA 7
#define ERROR_SECTOR_NOT_FOUND 8
#define ERROR_OUT_OF_PAPER 9
#define ERROR_WRITE_FAULT 10
#define ERROR_READ_FAULT 11
#define ERROR_GENERAL_FAILURE 12
#define ERROR_RESERVED_13 13
#define ERROR_RESERVED_14 14
#define ERROR_BAD_DISK_CHANGE 15
#define COMMAND_READ 3
#define COMMAND_WRITE 12
#define COMMAND_PLAY_AUDIO 132
#define COMMAND_STOP_AUDIO 133
#define COMMAND_RESUME_AUDIO 136
#define READ_REQUEST_AUDIO_CHANNEL_INFO 4
#define READ_REQUEST_DEVICE_STATUS 6
#define READ_REQUEST_MEDIA_CHANGE 9
#define READ_REQUEST_AUDIO_DISK_INFO 10
#define READ_REQUEST_AUDIO_TRACK_INFO 11
#define READ_REQUEST_AUDIO_STATUS 15
#define WRITE_REQUEST_EJECT 0
#define WRITE_REQUEST_RESET 2
#define WRITE_REQUEST_AUDIO_CHANNEL_INFO 3
#define STATUS_DOOR_OPEN 0x00000001
#define STATUS_DOOR_UNLOCKED 0x00000002
#define STATUS_RAW_SUPPORT 0x00000004
#define STATUS_READ_WRITE 0x00000008
#define STATUS_AUDIO_SUPPORT 0x00000010
#define STATUS_INTERLEAVE_SUPPORT 0x00000020
#define STATUS_BIT_6_RESERVED 0x00000040
#define STATUS_PREFETCH_SUPPORT 0x00000080
#define STATUS_AUDIO_MANIPLUATION_SUPPORT 0x00000100
#define STATUS_RED_BOOK_ADDRESS_SUPPORT 0x00000200
#define MEDIA_NOT_CHANGED 1
#define MEDIA_STATUS_UNKNOWN 0
#define MEDIA_CHANGED -1
#define AUDIO_CONTROL_MASK 0xd0
#define AUDIO_CONTROL_DATA_TRACK 0x40
#define AUDIO_CONTROL_AUDIO_2_TRACK 0x00
#define AUDIO_CONTROL_AUDIO_2P_TRACK 0x10
#define AUDIO_CONTROL_AUDIO_4_TRACK 0x80
#define AUDIO_CONTROL_AUDIO_4P_TRACK 0x90
#define AUDIO_STATUS_PAUSED 0x0001
#pragma pack(1)
struct playAudioRequest
{
char addressingMode;
int startLocation;
int sectors;
};
struct readRequest
{
char mediaDescriptor;
short bufferOffset;
short bufferSegment;
short length;
short startSector;
int volumeID;
};
struct writeRequest
{
char mediaDescriptor;
short bufferOffset;
short bufferSegment;
short length;
short startSector;
int volumeID;
};
struct cd_request
{
char headerLength;
char unit;
char command;
short status;
char reserved[8];
union
{
struct playAudioRequest playAudio;
struct readRequest read;
struct writeRequest write;
} x;
};
struct audioChannelInfo_s
{
char code;
char channel0input;
char channel0volume;
char channel1input;
char channel1volume;
char channel2input;
char channel2volume;
char channel3input;
char channel3volume;
};
struct deviceStatus_s
{
char code;
int status;
};
struct mediaChange_s
{
char code;
char status;
};
struct audioDiskInfo_s
{
char code;
char lowTrack;
char highTrack;
int leadOutStart;
};
struct audioTrackInfo_s
{
char code;
char track;
int start;
char control;
};
struct audioStatus_s
{
char code;
short status;
int PRstartLocation;
int PRendLocation;
};
struct reset_s
{
char code;
};
union readInfo_u
{
struct audioChannelInfo_s audioChannelInfo;
struct deviceStatus_s deviceStatus;
struct mediaChange_s mediaChange;
struct audioDiskInfo_s audioDiskInfo;
struct audioTrackInfo_s audioTrackInfo;
struct audioStatus_s audioStatus;
struct reset_s reset;
};
#pragma pack()
#define MAXIMUM_TRACKS 32
typedef struct
{
int start;
int length;
qboolean isData;
} track_info;
typedef struct
{
qboolean valid;
int leadOutAddress;
track_info track[MAXIMUM_TRACKS];
byte lowTrack;
byte highTrack;
} cd_info;
static struct cd_request *cdRequest;
static union readInfo_u *readInfo;
static cd_info cd;
static qboolean playing = false;
static qboolean wasPlaying = false;
static qboolean mediaCheck = false;
static qboolean initialized = false;
static qboolean enabled = true;
static qboolean playLooping = false;
static short cdRequestSegment;
static short cdRequestOffset;
static short readInfoSegment;
static short readInfoOffset;
static byte remap[256];
static byte cdrom;
static byte playTrack;
static byte cdvolume;
static int RedBookToSector(int rb)
{
byte minute;
byte second;
byte frame;
minute = (rb >> 16) & 0xff;
second = (rb >> 8) & 0xff;
frame = rb & 0xff;
return minute * 60 * 75 + second * 75 + frame;
}
static void CDAudio_Reset(void)
{
cdRequest->headerLength = 13;
cdRequest->unit = 0;
cdRequest->command = COMMAND_WRITE;
cdRequest->status = 0;
cdRequest->x.write.mediaDescriptor = 0;
cdRequest->x.write.bufferOffset = readInfoOffset;
cdRequest->x.write.bufferSegment = readInfoSegment;
cdRequest->x.write.length = sizeof(struct reset_s);
cdRequest->x.write.startSector = 0;
cdRequest->x.write.volumeID = 0;
readInfo->reset.code = WRITE_REQUEST_RESET;
regs.x.ax = 0x1510;
regs.x.cx = cdrom;
regs.x.es = cdRequestSegment;
regs.x.bx = cdRequestOffset;
dos_int86 (0x2f);
}
static void CDAudio_Eject(void)
{
cdRequest->headerLength = 13;
cdRequest->unit = 0;
cdRequest->command = COMMAND_WRITE;
cdRequest->status = 0;
cdRequest->x.write.mediaDescriptor = 0;
cdRequest->x.write.bufferOffset = readInfoOffset;
cdRequest->x.write.bufferSegment = readInfoSegment;
cdRequest->x.write.length = sizeof(struct reset_s);
cdRequest->x.write.startSector = 0;
cdRequest->x.write.volumeID = 0;
readInfo->reset.code = WRITE_REQUEST_EJECT;
regs.x.ax = 0x1510;
regs.x.cx = cdrom;
regs.x.es = cdRequestSegment;
regs.x.bx = cdRequestOffset;
dos_int86 (0x2f);
}
static int CDAudio_GetAudioTrackInfo(byte track, int *start)
{
byte control;
cdRequest->headerLength = 13;
cdRequest->unit = 0;
cdRequest->command = COMMAND_READ;
cdRequest->status = 0;
cdRequest->x.read.mediaDescriptor = 0;
cdRequest->x.read.bufferOffset = readInfoOffset;
cdRequest->x.read.bufferSegment = readInfoSegment;
cdRequest->x.read.length = sizeof(struct audioTrackInfo_s);
cdRequest->x.read.startSector = 0;
cdRequest->x.read.volumeID = 0;
readInfo->audioTrackInfo.code = READ_REQUEST_AUDIO_TRACK_INFO;
readInfo->audioTrackInfo.track = track;
regs.x.ax = 0x1510;
regs.x.cx = cdrom;
regs.x.es = cdRequestSegment;
regs.x.bx = cdRequestOffset;
dos_int86 (0x2f);
if (cdRequest->status & STATUS_ERROR_BIT)
{
Con_DPrintf("CDAudio_GetAudioTrackInfo %04x\n", cdRequest->status & 0xffff);
return -1;
}
*start = readInfo->audioTrackInfo.start;
control = readInfo->audioTrackInfo.control & AUDIO_CONTROL_MASK;
return (control & AUDIO_CONTROL_DATA_TRACK);
}
static int CDAudio_GetAudioDiskInfo(void)
{
int n;
cdRequest->headerLength = 13;
cdRequest->unit = 0;
cdRequest->command = COMMAND_READ;
cdRequest->status = 0;
cdRequest->x.read.mediaDescriptor = 0;
cdRequest->x.read.bufferOffset = readInfoOffset;
cdRequest->x.read.bufferSegment = readInfoSegment;
cdRequest->x.read.length = sizeof(struct audioDiskInfo_s);
cdRequest->x.read.startSector = 0;
cdRequest->x.read.volumeID = 0;
readInfo->audioDiskInfo.code = READ_REQUEST_AUDIO_DISK_INFO;
regs.x.ax = 0x1510;
regs.x.cx = cdrom;
regs.x.es = cdRequestSegment;
regs.x.bx = cdRequestOffset;
dos_int86 (0x2f);
if (cdRequest->status & STATUS_ERROR_BIT)
{
Con_DPrintf("CDAudio_GetAudioDiskInfo %04x\n", cdRequest->status & 0xffff);
return -1;
}
cd.valid = true;
cd.lowTrack = readInfo->audioDiskInfo.lowTrack;
cd.highTrack = readInfo->audioDiskInfo.highTrack;
cd.leadOutAddress = readInfo->audioDiskInfo.leadOutStart;
for (n = cd.lowTrack; n <= cd.highTrack; n++)
{
cd.track[n].isData = CDAudio_GetAudioTrackInfo (n, &cd.track[n].start);
if (n > cd.lowTrack)
{
cd.track[n-1].length = RedBookToSector(cd.track[n].start) - RedBookToSector(cd.track[n-1].start);
if (n == cd.highTrack)
cd.track[n].length = RedBookToSector(cd.leadOutAddress) - RedBookToSector(cd.track[n].start);
}
}
return 0;
}
static int CDAudio_GetAudioStatus(void)
{
cdRequest->headerLength = 13;
cdRequest->unit = 0;
cdRequest->command = COMMAND_READ;
cdRequest->status = 0;
cdRequest->x.read.mediaDescriptor = 0;
cdRequest->x.read.bufferOffset = readInfoOffset;
cdRequest->x.read.bufferSegment = readInfoSegment;
cdRequest->x.read.length = sizeof(struct audioStatus_s);
cdRequest->x.read.startSector = 0;
cdRequest->x.read.volumeID = 0;
readInfo->audioDiskInfo.code = READ_REQUEST_AUDIO_STATUS;
regs.x.ax = 0x1510;
regs.x.cx = cdrom;
regs.x.es = cdRequestSegment;
regs.x.bx = cdRequestOffset;
dos_int86 (0x2f);
if (cdRequest->status & STATUS_ERROR_BIT)
return -1;
return 0;
}
static int CDAudio_MediaChange(void)
{
cdRequest->headerLength = 13;
cdRequest->unit = 0;
cdRequest->command = COMMAND_READ;
cdRequest->status = 0;
cdRequest->x.read.mediaDescriptor = 0;
cdRequest->x.read.bufferOffset = readInfoOffset;
cdRequest->x.read.bufferSegment = readInfoSegment;
cdRequest->x.read.length = sizeof(struct mediaChange_s);
cdRequest->x.read.startSector = 0;
cdRequest->x.read.volumeID = 0;
readInfo->mediaChange.code = READ_REQUEST_MEDIA_CHANGE;
regs.x.ax = 0x1510;
regs.x.cx = cdrom;
regs.x.es = cdRequestSegment;
regs.x.bx = cdRequestOffset;
dos_int86 (0x2f);
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