/*
 * 86Box	A hypervisor and IBM PC system emulator that specializes in
 *		running old operating systems and software designed for IBM
 *		PC systems and compatibles from 1981 through fairly recent
 *		system designs based on the PCI bus.
 *
 *		This file is part of the 86Box distribution.
 *
 *		Generic CD-ROM drive core header.
 *
 * Version:	@(#)cdrom.h	1.0.17	2018/10/28
 *
 * Author:	Miran Grca, <mgrca8@gmail.com>
 *
 *		Copyright 2016,2017 Miran Grca.
 */
#ifndef EMU_CDROM_H
#define EMU_CDROM_H


#define CDROM_NUM			4

#define CD_STATUS_EMPTY			0
#define CD_STATUS_DATA_ONLY		1
#define CD_STATUS_PAUSED		2
#define CD_STATUS_PLAYING		3
#define CD_STATUS_STOPPED		4
#define CD_STATUS_PLAYING_COMPLETED	5

/* Medium changed flag. */
#define CD_STATUS_MEDIUM_CHANGED	0x80

#define CD_TRACK_AUDIO			0x08
#define CD_TRACK_MODE2			0x04

#define CD_READ_DATA			0
#define CD_READ_AUDIO			1
#define CD_READ_RAW			2

#define CD_TOC_NORMAL			0
#define CD_TOC_SESSION			1
#define CD_TOC_RAW			2

#define BUF_SIZE 32768

#define CDROM_IMAGE 200

/* This is so that if/when this is changed to something else,
   changing this one define will be enough. */
#define CDROM_EMPTY !dev->host_drive


#ifdef __cplusplus
extern "C" {
#endif

enum {
    CDROM_BUS_DISABLED = 0,
    CDROM_BUS_ATAPI = 4,
    CDROM_BUS_SCSI,
    CDROM_BUS_USB
};


/* To shut up the GCC compilers. */
struct cdrom;


typedef struct {
    uint8_t	attr, track,
		index,
		abs_m, abs_s, abs_f,
		rel_m, rel_s, rel_f;
} subchannel_t;

typedef struct {
    int		number;
    uint8_t	attr, m, s, f;
} track_info_t;

/* Define the various CD-ROM drive operations (ops). */
typedef struct {
    void	(*get_tracks)(struct cdrom *dev, int *first, int *last);
    void	(*get_track_info)(struct cdrom *dev, uint32_t track, int end, track_info_t *ti);
    void	(*get_subchannel)(struct cdrom *dev, uint32_t lba, subchannel_t *subc);
    int		(*sector_size)(struct cdrom *dev, uint32_t lba);
    int		(*read_sector)(struct cdrom *dev, int type, uint8_t *b, uint32_t lba);
    int		(*track_type)(struct cdrom *dev, uint32_t lba);
    void	(*exit)(struct cdrom *dev);
} cdrom_ops_t;

typedef struct cdrom {
    uint8_t id,
	    res, res0,		/* Reserved for other ID's. */
	    res1,
	    ide_channel, scsi_device_id,
	    bus_type,		/* 0 = ATAPI, 1 = SCSI */
	    bus_mode,		/* Bit 0 = PIO suported;
				   Bit 1 = DMA supportd. */
	    cd_status,		/* Struct variable reserved for
				   media status. */
	    speed, cur_speed;

    FILE* img_fp;
    void *priv;

    wchar_t image_path[1024],
	    prev_image_path[1024];

    uint32_t sound_on, cdrom_capacity,
	     pad, seek_pos,
	     seek_diff, cd_end;

    int host_drive, prev_host_drive,
	cd_buflen;

    const cdrom_ops_t	*ops;

    void	*image;

    void	(*insert)(void *p);
    void	(*close)(void *p);
    uint32_t	(*get_volume)(void *p, int channel);
    uint32_t	(*get_channel)(void *p, int channel);

    int16_t cd_buffer[BUF_SIZE];
} cdrom_t;


extern cdrom_t	cdrom[CDROM_NUM];

extern int	cdrom_lba_to_msf_accurate(int lba);
extern double	cdrom_seek_time(cdrom_t *dev);
extern void	cdrom_stop(cdrom_t *dev);
extern int	cdrom_audio_callback(cdrom_t *dev, int16_t *output, int len);
extern uint8_t	cdrom_audio_play(cdrom_t *dev, uint32_t pos, uint32_t len, int ismsf);
extern void	cdrom_audio_pause_resume(cdrom_t *dev, uint8_t resume);
extern uint8_t	cdrom_get_current_subchannel(cdrom_t *dev, uint8_t *b, int msf);
extern int	cdrom_read_toc(cdrom_t *dev, unsigned char *b, int type,
			       unsigned char start_track, int msf, int max_len);
extern int	cdrom_readsector_raw(cdrom_t *dev, uint8_t *buffer, int sector, int ismsf,
				     int cdrom_sector_type, int cdrom_sector_flags, int *len);
extern void	cdrom_seek(cdrom_t *dev, uint32_t pos);

extern void     cdrom_close_handler(uint8_t id);
extern void	cdrom_insert(uint8_t id);
extern void	cdrom_eject(uint8_t id);
extern void	cdrom_reload(uint8_t id);

extern int	cdrom_image_open(cdrom_t *dev, const wchar_t *fn);
extern void	cdrom_image_close(cdrom_t *dev);
extern void	cdrom_image_reset(cdrom_t *dev);

extern void	cdrom_update_cdb(uint8_t *cdb, int lba_pos,
				 int number_of_blocks);

extern int	find_cdrom_for_scsi_id(uint8_t scsi_id);

extern void     cdrom_close(void);
extern void	cdrom_global_init(void);
extern void	cdrom_global_reset(void);
extern void	cdrom_hard_reset(void);
extern void	scsi_cdrom_drive_reset(int c);

#ifdef __cplusplus
}
#endif


#endif	/*EMU_CDROM_H*/