void CDIF_MT::HintReadSector(uint32 lba)
{
if(UnrecoverableError)
return;
ReadThreadQueue.Write(CDIF_Message(CDIF_MSG_READ_SECTOR, lba));
}
bool CDIF_MT::ReadRawSectorPWOnly(uint8* pwbuf, int32 lba, bool hint_fullread)
{
if(UnrecoverableError)
{
memset(pwbuf, 0, 96);
return(false);
}
if(lba < LBA_Read_Minimum || lba > LBA_Read_Maximum)
{
MDFN_printf("Attempt to read sector out of bounds; LBA=%d\n", lba);
memset(pwbuf, 0, 96);
return(false);
}
if(disc_cdaccess->Fast_Read_Raw_PW_TSRE(pwbuf, lba))
{
if(hint_fullread)
ReadThreadQueue.Write(CDIF_Message(CDIF_MSG_READ_SECTOR, lba));
return(true);
}
else
{
uint8 tmpbuf[2352 + 96];
bool ret;
ret = ReadRawSector(tmpbuf, lba);
memcpy(pwbuf, tmpbuf + 2352, 96);
return ret;
}
}
bool CDIF_MT::Eject(bool eject_status)
{
if(UnrecoverableError)
return(false);
CDIF_Message msg;
ReadThreadQueue.Write(CDIF_Message(CDIF_MSG_EJECT, eject_status));
EmuThreadQueue.Read(&msg);
if(msg.message == CDIF_MSG_FATAL_ERROR)
{
MDFN_PrintError(_("Error on eject/insert attempt: %s"), msg.str_message.c_str());
return(false);
}
return(true);
}
bool CDIF_MT::Eject(bool eject_status)
{
if(UnrecoverableError)
return(false);
try
{
CDIF_Message msg;
ReadThreadQueue.Write(CDIF_Message(CDIF_MSG_EJECT, eject_status));
EmuThreadQueue.Read(&msg);
}
catch(std::exception &e)
{
MDFN_PrintError(_("Error on eject/insert attempt: %s"), e.what());
return(false);
}
return(true);
}
bool CDIF_MT::ReadRawSector(uint8 *buf, int32 lba)
{
bool found = false;
bool error_condition = false;
if(UnrecoverableError)
{
memset(buf, 0, 2352 + 96);
return(false);
}
if(lba < LBA_Read_Minimum || lba > LBA_Read_Maximum)
{
MDFN_printf("Attempt to read sector out of bounds; LBA=%d\n", lba);
memset(buf, 0, 2352 + 96);
return(false);
}
//fprintf(stderr, "%d\n", ra_lba - lba);
ReadThreadQueue.Write(CDIF_Message(CDIF_MSG_READ_SECTOR, lba));
//
//
//
MDFND_LockMutex(SBMutex);
do
{
for(int i = 0; i < SBSize; i++)
{
if(SectorBuffers[i].valid && SectorBuffers[i].lba == lba)
{
error_condition = SectorBuffers[i].error;
memcpy(buf, SectorBuffers[i].data, 2352 + 96);
found = true;
}
}
if(!found)
{
//int32 swt = MDFND_GetTime();
MDFND_WaitCond(SBCond, SBMutex);
//printf("SB Waited: %d\n", MDFND_GetTime() - swt);
}
} while(!found);
MDFND_UnlockMutex(SBMutex);
//
//
//
return(!error_condition);
}
bool CDIF_MT::Eject(bool eject_status)
{
if(UnrecoverableError)
return(false);
try
{
CDIF_Message msg;
ReadThreadQueue.Write(CDIF_Message(CDIF_MSG_EJECT, eject_status));
EmuThreadQueue.Read(&msg);
}
catch(std::exception &e)
{
log_cb(RETRO_LOG_ERROR, "Error on eject/insert attempt: %s\n", e.what());
return(false);
}
return(true);
}
bool CDIF_MT::ReadRawSector(uint8 *buf, uint32 lba)
{
bool found = FALSE;
bool error_condition = false;
if(UnrecoverableError)
{
memset(buf, 0, 2352 + 96);
return(false);
}
// This shouldn't happen, the emulated-system-specific CDROM emulation code should make sure the emulated program doesn't try
// to read past the last "real" sector of the disc.
if(lba >= disc_toc.tracks[100].lba)
{
printf("Attempt to read LBA %d, >= LBA %d\n", lba, disc_toc.tracks[100].lba);
return(FALSE);
}
ReadThreadQueue.Write(CDIF_Message(CDIF_MSG_READ_SECTOR, lba));
//
//
//
MDFND_LockMutex(SBMutex);
do
{
for(int i = 0; i < SBSize; i++)
{
if(SectorBuffers[i].valid && SectorBuffers[i].lba == lba)
{
error_condition = SectorBuffers[i].error;
memcpy(buf, SectorBuffers[i].data, 2352 + 96);
found = TRUE;
}
}
if(!found)
{
//int32 swt = MDFND_GetTime();
MDFND_WaitCond(SBCond, SBMutex);
//printf("SB Waited: %d\n", MDFND_GetTime() - swt);
}
} while(!found);
MDFND_UnlockMutex(SBMutex);
//
//
//
return(!error_condition);
}
int CDIF_MT::ReadThreadStart()
{
bool Running = TRUE;
DiscEjected = true;
SBWritePos = 0;
ra_lba = 0;
ra_count = 0;
last_read_lba = ~0U;
try
{
RT_EjectDisc(false, true);
}
catch(std::exception &e)
{
EmuThreadQueue.Write(CDIF_Message(CDIF_MSG_FATAL_ERROR, std::string(e.what())));
return(0);
}
is_phys_cache = disc_cdaccess->Is_Physical();
EmuThreadQueue.Write(CDIF_Message(CDIF_MSG_DONE));
while(Running)
{
CDIF_Message msg;
// Only do a blocking-wait for a message if we don't have any sectors to read-ahead.
// MDFN_DispMessage("%d %d %d\n", last_read_lba, ra_lba, ra_count);
if(ReadThreadQueue.Read(&msg, ra_count ? FALSE : TRUE))
{
switch(msg.message)
{
case CDIF_MSG_DIEDIEDIE:
Running = FALSE;
break;
case CDIF_MSG_EJECT:
try
{
RT_EjectDisc(msg.args[0]);
EmuThreadQueue.Write(CDIF_Message(CDIF_MSG_DONE));
}
catch(std::exception &e)
{
EmuThreadQueue.Write(CDIF_Message(CDIF_MSG_FATAL_ERROR, std::string(e.what())));
}
break;
case CDIF_MSG_READ_SECTOR:
{
static const int max_ra = 16;
static const int initial_ra = 1;
static const int speedmult_ra = 2;
uint32 new_lba = msg.args[0];
assert((unsigned int)max_ra < (SBSize / 4));
if(last_read_lba != ~0U && new_lba == (last_read_lba + 1))
{
int how_far_ahead = ra_lba - new_lba;
if(how_far_ahead <= max_ra)
ra_count = std::min(speedmult_ra, 1 + max_ra - how_far_ahead);
else
ra_count++;
}
else if(new_lba != last_read_lba)
{
ra_lba = new_lba;
ra_count = initial_ra;
}
last_read_lba = new_lba;
}
break;
}
}
// Don't read >= the "end" of the disc, silly snake. Slither.
if(ra_count && ra_lba == disc_toc.tracks[100].lba)
{
ra_count = 0;
//printf("Ephemeral scarabs: %d!\n", ra_lba);
}
if(ra_count)
{
uint8 tmpbuf[2352 + 96];
bool error_condition = false;
try
{
disc_cdaccess->Read_Raw_Sector(tmpbuf, ra_lba);
}
catch(std::exception &e)
{
MDFN_PrintError(_("Sector %u read error: %s"), ra_lba, e.what());
memset(tmpbuf, 0, sizeof(tmpbuf));
error_condition = true;
}
MDFND_LockMutex(SBMutex);
SectorBuffers[SBWritePos].lba = ra_lba;
memcpy(SectorBuffers[SBWritePos].data, tmpbuf, 2352 + 96);
SectorBuffers[SBWritePos].valid = TRUE;
SectorBuffers[SBWritePos].error = error_condition;
SBWritePos = (SBWritePos + 1) % SBSize;
MDFND_UnlockMutex(SBMutex);
ra_lba++;
ra_count--;
}
}
return(1);
}
int CDIF_MT::ReadThreadStart()
{
bool Running = true;
SBWritePos = 0;
ra_lba = 0;
ra_count = 0;
last_read_lba = LBA_Read_Maximum + 1;
try
{
disc_cdaccess->Read_TOC(&disc_toc);
if(disc_toc.first_track < 1 || disc_toc.last_track > 99 || disc_toc.first_track > disc_toc.last_track)
{
throw(MDFN_Error(0, _("TOC first(%d)/last(%d) track numbers bad."), disc_toc.first_track, disc_toc.last_track));
}
SBWritePos = 0;
ra_lba = 0;
ra_count = 0;
last_read_lba = LBA_Read_Maximum + 1;
std::fill(SectorBuffers, SectorBuffers + SBSize, CDIF_Sector_Buffer());
}
catch(std::exception &e)
{
EmuThreadQueue.Write(CDIF_Message(CDIF_MSG_FATAL_ERROR, std::string(e.what())));
return(0);
}
EmuThreadQueue.Write(CDIF_Message(CDIF_MSG_DONE));
while(Running)
{
CDIF_Message msg;
// Only do a blocking-wait for a message if we don't have any sectors to read-ahead.
// MDFN_DispMessage("%d %d %d\n", last_read_lba, ra_lba, ra_count);
if(ReadThreadQueue.Read(&msg, ra_count ? false : true))
{
switch(msg.message)
{
case CDIF_MSG_DIEDIEDIE:
Running = false;
break;
case CDIF_MSG_READ_SECTOR:
{
static const int max_ra = 16;
static const int initial_ra = 1;
static const int speedmult_ra = 2;
int32 new_lba = msg.args[0];
assert((unsigned int)max_ra < (SBSize / 4));
if(new_lba == (last_read_lba + 1))
{
int how_far_ahead = ra_lba - new_lba;
if(how_far_ahead <= max_ra)
ra_count = std::min(speedmult_ra, 1 + max_ra - how_far_ahead);
else
ra_count++;
}
else if(new_lba != last_read_lba)
{
ra_lba = new_lba;
ra_count = initial_ra;
}
last_read_lba = new_lba;
}
break;
}
}
//
// Don't read beyond what the disc (image) readers can handle sanely.
//
if(ra_count && ra_lba == LBA_Read_Maximum)
{
ra_count = 0;
//printf("Ephemeral scarabs: %d!\n", ra_lba);
}
if(ra_count)
{
uint8 tmpbuf[2352 + 96];
bool error_condition = false;
//try
{
if(disc_cdaccess->Read_Raw_Sector(tmpbuf, ra_lba) == -1)
{
MDFN_Notify(MDFN_NOTICE_ERROR, _("Sector %u read error"), ra_lba);
memset(tmpbuf, 0, sizeof(tmpbuf));
error_condition = true;
}
}
/*catch(std::exception &e)
{
MDFN_Notify(MDFN_NOTICE_ERROR, _("Sector %u read error: %s"), ra_lba, e.what());
memset(tmpbuf, 0, sizeof(tmpbuf));
error_condition = true;
}*/
//
//
MDFND_LockMutex(SBMutex);
SectorBuffers[SBWritePos].lba = ra_lba;
memcpy(SectorBuffers[SBWritePos].data, tmpbuf, 2352 + 96);
SectorBuffers[SBWritePos].valid = true;
SectorBuffers[SBWritePos].error = error_condition;
SBWritePos = (SBWritePos + 1) % SBSize;
MDFND_SignalCond(SBCond);
MDFND_UnlockMutex(SBMutex);
//
//
ra_lba++;
ra_count--;
}
}
return(1);
}
