132 lines
2.5 KiB
C++
132 lines
2.5 KiB
C++
/* Mednafen - Multi-system Emulator
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*
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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 2 of the License, or
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* (at your option) any later version.
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*
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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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*
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "ss.h"
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#include <string.h>
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#include <sys/types.h>
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#include "cdromif.h"
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//#include "CDAccess.h"
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//#include "../general.h"
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#include <algorithm>
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using namespace CDUtility;
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enum
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{
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// Status/Error messages
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CDIF_MSG_DONE = 0, // Read -> emu. args: No args.
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CDIF_MSG_INFO, // Read -> emu. args: str_message
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CDIF_MSG_FATAL_ERROR, // Read -> emu. args: *TODO ARGS*
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//
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// Command messages.
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//
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CDIF_MSG_DIEDIEDIE, // Emu -> read
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CDIF_MSG_READ_SECTOR, /* Emu -> read
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args[0] = lba
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*/
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};
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typedef struct
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{
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bool valid;
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bool error;
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int32 lba;
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uint8 data[2352 + 96];
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} CDIF_Sector_Buffer;
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CDIF::CDIF() : UnrecoverableError(false)
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{
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}
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CDIF::~CDIF()
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{
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}
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bool CDIF::ValidateRawSector(uint8 *buf)
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{
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int mode = buf[12 + 3];
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if(mode != 0x1 && mode != 0x2)
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return(false);
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if(!edc_lec_check_and_correct(buf, mode == 2))
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return(false);
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return(true);
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}
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int CDIF::ReadSector(uint8* buf, int32 lba, uint32 sector_count, bool suppress_uncorrectable_message)
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{
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int ret = 0;
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if(UnrecoverableError)
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return(false);
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while(sector_count--)
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{
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uint8 tmpbuf[2352 + 96];
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if(!ReadRawSector(tmpbuf, lba))
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{
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puts("CDIF Raw Read error");
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return(FALSE);
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}
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if(!ValidateRawSector(tmpbuf))
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{
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/*if(!suppress_uncorrectable_message)
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{
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MDFN_DispMessage(_("Uncorrectable data at sector %d"), lba);
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MDFN_PrintError(_("Uncorrectable data at sector %d"), lba);
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}*/
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return(false);
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}
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const int mode = tmpbuf[12 + 3];
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if(!ret)
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ret = mode;
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if(mode == 1)
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{
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memcpy(buf, &tmpbuf[12 + 4], 2048);
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}
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else if(mode == 2)
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{
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memcpy(buf, &tmpbuf[12 + 4 + 8], 2048);
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}
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else
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{
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printf("CDIF_ReadSector() invalid sector type at LBA=%u\n", (unsigned int)lba);
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return(false);
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}
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buf += 2048;
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lba++;
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}
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return(ret);
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}
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