mirror of
https://github.com/dingusdev/dingusppc.git
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d4c9db7fcf
Allows different implementations for different platforms (the JS build relies on browser APIs to stream disk images over the network). Setting aside the JS build, this also reduces some code duplication.
90 lines
2.3 KiB
C++
90 lines
2.3 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-22 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/** @file SCSI CD-ROM definitions. */
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#ifndef SCSI_CDROM_H
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#define SCSI_CDROM_H
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#include <devices/common/scsi/scsi.h>
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#include <utils/imgfile.h>
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#include <cinttypes>
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#include <memory>
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#include <string>
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/* Original CD-ROM addressing mode expressed
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in minutes, seconds and frames */
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typedef struct {
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int min;
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int sec;
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int frm;
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} AddrMsf;
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/* Descriptor for CD-ROM tracks in TOC */
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typedef struct {
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uint8_t trk_num;
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uint8_t adr_ctrl;
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uint32_t start_lba;
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} TrackDescriptor;
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#define CDROM_MAX_TRACKS 100
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#define LEAD_OUT_TRK_NUM 0xAA
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class ScsiCdrom : public ScsiDevice {
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public:
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ScsiCdrom(int my_id);
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~ScsiCdrom() = default;
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static std::unique_ptr<HWComponent> create() {
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return std::unique_ptr<ScsiCdrom>(new ScsiCdrom(3));
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}
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void insert_image(std::string filename);
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virtual void process_command();
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virtual bool prepare_data();
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protected:
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void read(uint32_t lba, uint16_t transfer_len, uint8_t cmd_len);
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void inquiry();
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void mode_sense();
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void read_toc();
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void read_capacity();
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private:
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AddrMsf lba_to_msf(const int lba);
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private:
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ImgFile cdr_img;
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uint64_t img_size;
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int total_frames;
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int num_tracks;
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int sector_size;
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bool eject_allowed = true;
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int bytes_out = 0;
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TrackDescriptor tracks[CDROM_MAX_TRACKS];
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char data_buf[1 << 18]; // TODO: proper buffer management
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};
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#endif // SCSI_CDROM_H
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