bool CDIF_Close(void)
{
if(p_cdrfile)
{
cdrfile_destroy(p_cdrfile);
p_cdrfile = NULL;
}
return(1);
}
static int ReadThreadStart(void *arg)
{
char *device_name = (char *)arg;
bool Running = TRUE;
MDFN_printf(_("Loading %s...\n\n"), device_name ? device_name : _("PHYSICAL CDROM DISC"));
MDFN_indent(1);
if(!(p_cdrfile = cdrfile_open(device_name)))
{
MDFN_indent(-1);
EmuThreadQueue->Write(CDIF_Message(CDIF_MSG_INIT_DONE, FALSE, 0, 0, 0, NULL));
return(0);
}
if(!cdrfile_read_toc(p_cdrfile, &toc))
{
puts("Error reading TOC");
MDFN_indent(-1);
EmuThreadQueue->Write(CDIF_Message(CDIF_MSG_INIT_DONE, FALSE, 0, 0, 0, NULL));
return(0);
}
if(toc.first_track < 1 || toc.last_track > 99 || toc.first_track > toc.last_track)
{
puts("First/Last track numbers bad");
MDFN_indent(-1);
EmuThreadQueue->Write(CDIF_Message(CDIF_MSG_INIT_DONE, FALSE, 0, 0, 0, NULL));
return(0);
}
for(int32 track = toc.first_track; track <= toc.last_track; track++)
{
MDFN_printf(_("Track %2d, LBA: %6d %s\n"), track, toc.tracks[track].lba, (toc.tracks[track].control & 0x4) ? "DATA" : "AUDIO");
}
MDFN_printf("Leadout: %6d\n", toc.tracks[100].lba);
MDFN_indent(-1);
EmuThreadQueue->Write(CDIF_Message(CDIF_MSG_INIT_DONE, TRUE, 0, 0, 0, NULL));
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;
uint32 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;
assert(how_far_ahead >= 0);
if(how_far_ahead <= max_ra)
ra_count = std::min(speedmult_ra, 1 + max_ra - how_far_ahead);
else
ra_count++;
}
else
{
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 == toc.tracks[100].lba)
{
ra_count = 0;
//printf("Ephemeral scarabs: %d!\n", ra_lba);
}
if(ra_count)
{
uint8 tmpbuf[2352 + 96];
if(!cdrfile_read_raw_sector(p_cdrfile, tmpbuf, ra_lba))
{
printf("Sector %d read error! Abandon ship!", ra_lba);
memset(tmpbuf, 0, sizeof(tmpbuf));
}
MDFND_LockMutex(SBMutex);
SectorBuffers[SBWritePos].lba = ra_lba;
memcpy(SectorBuffers[SBWritePos].data, tmpbuf, 2352 + 96);
SectorBuffers[SBWritePos].valid = TRUE;
SBWritePos = (SBWritePos + 1) % SBSize;
MDFND_UnlockMutex(SBMutex);
ra_lba++;
ra_count--;
}
}
if(p_cdrfile)
{
cdrfile_destroy(p_cdrfile);
p_cdrfile = NULL;
}
return(1);
}
