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https://github.com/ekeeke/Genesis-Plus-GX.git
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113 lines
3.4 KiB
C
113 lines
3.4 KiB
C
/***************************************************************************************
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* Genesis Plus
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* CD drive processor & CD-DA fader
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*
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* Copyright (C) 2012 Eke-Eke (Genesis Plus GX)
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*
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* Redistribution and use of this code or any derivative works are permitted
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* provided that the following conditions are met:
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*
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* - Redistributions may not be sold, nor may they be used in a commercial
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* product or activity.
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*
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* - Redistributions that are modified from the original source must include the
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* complete source code, including the source code for all components used by a
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* binary built from the modified sources. However, as a special exception, the
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* source code distributed need not include anything that is normally distributed
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* (in either source or binary form) with the major components (compiler, kernel,
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* and so on) of the operating system on which the executable runs, unless that
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* component itself accompanies the executable.
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*
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* - Redistributions must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************************/
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#ifndef _HW_CDD_
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#define _HW_CDD_
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#include "blip_buf.h"
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#ifdef USE_LIBTREMOR
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#include "tremor/ivorbisfile.h"
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#endif
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#define cdd scd.cdd_hw
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/* CDD status */
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#define NO_DISC 0x00
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#define CD_PLAY 0x01
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#define CD_SEEK 0x02
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#define CD_SCAN 0x03
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#define CD_READY 0x04
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#define CD_OPEN 0x05 /* similar to 0x0E ? */
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#define CD_STOP 0x09
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#define CD_END 0x0C
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/* CD blocks scanning speed */
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#define CD_SCAN_SPEED 30
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#define CD_MAX_TRACKS 100
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/* CD track */
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typedef struct
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{
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FILE *fd;
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#ifdef USE_LIBTREMOR
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OggVorbis_File vf;
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#endif
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int offset;
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int start;
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int end;
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} track_t;
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/* CD TOC */
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typedef struct
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{
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int end;
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int last;
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track_t tracks[CD_MAX_TRACKS];
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} toc_t;
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/* CDD hardware */
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typedef struct
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{
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uint32 cycles;
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uint32 latency;
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int loaded;
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int index;
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int lba;
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int scanOffset;
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int volume;
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uint8 status;
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uint16 sectorSize;
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toc_t toc;
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int16 audio[2];
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} cdd_t;
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/* Function prototypes */
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extern void cdd_init(blip_t* left, blip_t* right);
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extern void cdd_reset(void);
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extern int cdd_context_save(uint8 *state);
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extern int cdd_context_load(uint8 *state);
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extern int cdd_load(char *filename, char *header);
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extern void cdd_unload(void);
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extern void cdd_read_data(uint8 *dst);
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extern void cdd_read_audio(unsigned int samples);
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extern void cdd_update(void);
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extern void cdd_process(void);
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#endif
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