Genesis-Plus-GX/core/cd_hw/cdd.h

149 lines
4.3 KiB
C

/***************************************************************************************
* Genesis Plus
* CD drive processor & CD-DA fader
*
* Copyright (C) 2012-2021 Eke-Eke (Genesis Plus GX)
*
* Redistribution and use of this code or any derivative works are permitted
* provided that the following conditions are met:
*
* - Redistributions may not be sold, nor may they be used in a commercial
* product or activity.
*
* - Redistributions that are modified from the original source must include the
* complete source code, including the source code for all components used by a
* binary built from the modified sources. However, as a special exception, the
* source code distributed need not include anything that is normally distributed
* (in either source or binary form) with the major components (compiler, kernel,
* and so on) of the operating system on which the executable runs, unless that
* component itself accompanies the executable.
*
* - Redistributions must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************************/
#ifndef _HW_CDD_
#define _HW_CDD_
#include "blip_buf.h"
#if defined(USE_LIBVORBIS)
#include <vorbis/vorbisfile.h>
#elif defined(USE_LIBTREMOR)
#include "tremor/ivorbisfile.h"
#endif
#if defined(USE_LIBCHDR)
#include "libchdr/src/chd.h"
#include "libchdr/src/cdrom.h"
#endif
#define cdd scd.cdd_hw
/* CDD status */
#define CD_STOP 0x00
#define CD_PLAY 0x01
#define CD_SEEK 0x02
#define CD_SCAN 0x03
#define CD_PAUSE 0x04
#define CD_OPEN 0x05
#define NO_VALID_CHK 0x06 /* unused */
#define NO_VALID_CMD 0x07 /* unused */
#define CD_ERROR 0x08 /* unused */
#define CD_TOC 0x09
#define CD_TRACK_MOVE 0x0A /* unused */
#define NO_DISC 0x0B
#define CD_END 0x0C
#define CD_TRAY 0x0E /* unused */
#define CD_TEST 0x0F /* unusec */
/* CD-DA digital filter types */
#define CD_TYPE_DEFAULT 0x00
#define CD_TYPE_WONDERMEGA 0x01
#define CD_TYPE_WONDERMEGA_M2 0x02
/* CD track */
typedef struct
{
cdStream *fd;
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
OggVorbis_File vf;
#endif
int offset;
int start;
int end;
int type;
int loopEnabled;
int loopOffset;
} track_t;
/* CD TOC */
typedef struct
{
int end;
int last;
track_t tracks[100];
cdStream *sub;
} toc_t;
#if defined(USE_LIBCHDR)
/* CHD file */
typedef struct
{
chd_file *file;
uint8 *hunk;
int hunkbytes;
int hunknum;
int hunkofs;
} chd_t;
#endif
/* CDD hardware */
typedef struct
{
uint32 cycles;
uint32 latency;
int type;
int loaded;
int index;
int lba;
int scanOffset;
uint16 fader[2];
uint8 status;
uint16 sectorSize;
toc_t toc;
#if defined(USE_LIBCHDR)
chd_t chd;
#endif
int16 audio[2];
} cdd_t;
/* Function prototypes */
extern void cdd_init(int samplerate);
extern void cdd_reset(void);
extern int cdd_context_save(uint8 *state);
extern int cdd_context_load(uint8 *state, char *version);
extern int cdd_load(char *filename, char *header);
extern void cdd_unload(void);
extern void cdd_read_data(uint8 *dst, uint8 *subheader);
extern void cdd_seek_audio(int index, int lba);
extern void cdd_read_audio(unsigned int samples);
extern void cdd_update_audio(unsigned int samples);
extern void cdd_update(void);
extern void cdd_process(void);
#endif