dingusppc/devices/common/scsi/scsicdrom.h
Maxim Poliakovski a189c94980 scsihd: fix READ_CAPACITY_10 command.
Also bump internal buffer size to 2 MB
to temporarily fix buffer overflows.
2022-12-14 16:14:53 +01:00

90 lines
2.3 KiB
C++

/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-22 divingkatae and maximum
(theweirdo) spatium
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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 3 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, see <https://www.gnu.org/licenses/>.
*/
/** @file SCSI CD-ROM definitions. */
#ifndef SCSI_CDROM_H
#define SCSI_CDROM_H
#include <devices/common/scsi/scsi.h>
#include <cinttypes>
#include <fstream>
#include <memory>
#include <string>
/* Original CD-ROM addressing mode expressed
in minutes, seconds and frames */
typedef struct {
int min;
int sec;
int frm;
} AddrMsf;
/* Descriptor for CD-ROM tracks in TOC */
typedef struct {
uint8_t trk_num;
uint8_t adr_ctrl;
uint32_t start_lba;
} TrackDescriptor;
#define CDROM_MAX_TRACKS 100
#define LEAD_OUT_TRK_NUM 0xAA
class ScsiCdrom : public ScsiDevice {
public:
ScsiCdrom(int my_id);
~ScsiCdrom() = default;
static std::unique_ptr<HWComponent> create() {
return std::unique_ptr<ScsiCdrom>(new ScsiCdrom(3));
}
void insert_image(std::string filename);
virtual void process_command();
virtual bool prepare_data();
protected:
void read(uint32_t lba, uint16_t transfer_len, uint8_t cmd_len);
void inquiry();
void mode_sense();
void read_toc();
void read_capacity();
private:
AddrMsf lba_to_msf(const int lba);
private:
std::fstream cdr_img;
uint64_t img_size;
int total_frames;
int num_tracks;
int sector_size;
bool eject_allowed = true;
int bytes_out = 0;
TrackDescriptor tracks[CDROM_MAX_TRACKS];
char data_buf[1 << 18]; // TODO: proper buffer management
};
#endif // SCSI_CDROM_H