mirror of
https://github.com/libretro/beetle-pce-fast-libretro.git
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160 lines
4.0 KiB
C++
160 lines
4.0 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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#ifndef __MDFN_CDROM_CDROMIF_H
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#define __MDFN_CDROM_CDROMIF_H
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#include "CDUtility.h"
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#include "../Stream.h"
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#include "CDAccess.h"
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#include <queue>
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typedef CDUtility::TOC CD_TOC;
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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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uint32 lba;
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uint8 data[2352 + 96];
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} CDIF_Sector_Buffer;
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class CDIF
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{
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public:
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CDIF();
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virtual ~CDIF();
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inline void ReadTOC(CDUtility::TOC *read_target)
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{
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*read_target = disc_toc;
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}
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virtual void HintReadSector(uint32 lba) = 0;
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virtual bool ReadRawSector(uint8 *buf, uint32 lba) = 0;
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// Call for mode 1 or mode 2 form 1 only.
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bool ValidateRawSector(uint8 *buf);
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// Utility/Wrapped functions
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// Reads mode 1 and mode2 form 1 sectors(2048 bytes per sector returned)
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// Will return the type(1, 2) of the first sector read to the buffer supplied, 0 on error
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int ReadSector(uint8* pBuf, uint32 lba, uint32 nSectors);
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// Return true if operation succeeded or it was a NOP(either due to not being implemented, or the current status matches eject_status).
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// Returns false on failure(usually drive error of some kind; not completely fatal, can try again).
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virtual bool Eject(bool eject_status) = 0;
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inline bool IsPhysical(void) { return(is_phys_cache); }
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// For Mode 1, or Mode 2 Form 1.
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// No reference counting or whatever is done, so if you destroy the CDIF object before you destroy the returned Stream, things will go BOOM.
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Stream *MakeStream(uint32 lba, uint32 sector_count);
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protected:
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bool UnrecoverableError;
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bool is_phys_cache;
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CDUtility::TOC disc_toc;
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bool DiscEjected;
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};
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class CDIF_Message
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{
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public:
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CDIF_Message();
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CDIF_Message(unsigned int message_, uint32 arg0 = 0, uint32 arg1 = 0, uint32 arg2 = 0, uint32 arg3 = 0);
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CDIF_Message(unsigned int message_, const std::string &str);
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~CDIF_Message();
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unsigned int message;
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uint32 args[4];
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void *parg;
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std::string str_message;
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};
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class CDIF_Queue
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{
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public:
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CDIF_Queue();
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~CDIF_Queue();
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bool Read(CDIF_Message *message, bool blocking = TRUE);
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void Write(const CDIF_Message &message);
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private:
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std::queue<CDIF_Message> ze_queue;
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MDFN_Mutex *ze_mutex;
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};
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// TODO: prohibit copy constructor
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class CDIF_MT : public CDIF
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{
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public:
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CDIF_MT(CDAccess *cda);
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virtual ~CDIF_MT();
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virtual void HintReadSector(uint32 lba);
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virtual bool ReadRawSector(uint8 *buf, uint32 lba);
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// Return true if operation succeeded or it was a NOP(either due to not being implemented, or the current status matches eject_status).
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// Returns false on failure(usually drive error of some kind; not completely fatal, can try again).
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virtual bool Eject(bool eject_status);
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// FIXME: Semi-private:
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int ReadThreadStart(void);
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private:
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CDAccess *disc_cdaccess;
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MDFN_Thread *CDReadThread;
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// Queue for messages to the read thread.
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CDIF_Queue ReadThreadQueue;
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// Queue for messages to the emu thread.
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CDIF_Queue EmuThreadQueue;
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enum { SBSize = 256 };
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CDIF_Sector_Buffer SectorBuffers[SBSize];
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uint32 SBWritePos;
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MDFN_Mutex *SBMutex;
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//
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// Read-thread-only:
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//
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void RT_EjectDisc(bool eject_status, bool skip_actual_eject = false);
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uint32 ra_lba;
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int ra_count;
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uint32 last_read_lba;
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};
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CDIF *CDIF_Open(const char *path, bool image_memcache);
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#endif
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