extern int IsoLoadTOC(struct IsoFile *isofile)
{
char tocext[] = ".toc\0";
char tocheader[5];
ACTUALHANDLE tochandle;
char tocname[256];
int i;
int j;
int retval;
unsigned char cdvdtype;
struct tocTN toctn;
struct tocTD toctd;
if (isofile == NULL) return(-1);
i = 0;
while ((i < 256) && (isofile->name[i] != 0))
{
tocname[i] = isofile->name[i];
i++;
} // ENDWHILE- Copying the data name to the toc name
j = 0;
while ((i < 256) && (tocext[j] != 0))
{
tocname[i] = tocext[j];
i++;
j++;
} // ENDWHILE- Append ".toc" to end of name
tocname[i] = 0; // And 0-terminate
tochandle = ActualFileOpenForRead(tocname);
if (tochandle == ACTUALHANDLENULL) return(-1);
retval = ActualFileRead(tochandle, 4, tocheader);
if (retval < 4)
{
ActualFileClose(tochandle);
tochandle = ACTUALHANDLENULL;
return(-1);
} // ENDIF- Trouble reading the 'toc' file?
if ((tocheader[0] != 'T') ||
(tocheader[1] != 'O') ||
(tocheader[2] != 'C') ||
(tocheader[3] != '1'))
{
ActualFileClose(tochandle);
tochandle = ACTUALHANDLENULL;
return(-1);
} // ENDIF- Not a 'toc' file after all?
#ifdef VERBOSE_FUNCTION_TOC
PrintLog("CDVDiso TOC: IsoLoadTOC(%s)", tocname);
#endif /* VERBOSE_FUNCTION_TOC */
retval = ActualFileRead(tochandle, 1, (char *) & cdvdtype);
if (retval < 1)
{
ActualFileClose(tochandle);
tochandle = ACTUALHANDLENULL;
return(-1);
} // ENDIF- Trouble reading the 'toc' file?
isofile->cdvdtype = cdvdtype;
IsoInitTOC(isofile);
if ((cdvdtype != CDVD_TYPE_PS2DVD) && (cdvdtype != CDVD_TYPE_DVDV))
{
retval = ActualFileRead(tochandle, sizeof(struct tocTN), (char *) & toctn);
if (retval < sizeof(struct tocTN))
{
ActualFileClose(tochandle);
tochandle = ACTUALHANDLENULL;
return(-1);
} // ENDIF- Trouble reading the 'toc' file?
if ((toctn.strack > 99) || (toctn.etrack > 99))
{
ActualFileClose(tochandle);
tochandle = ACTUALHANDLENULL;
return(-1);
} // ENDIF- Track numbers out of range?
#ifdef VERBOSE_FUNCTION_TOC
PrintLog("CDVDiso TOC: Start Track %u End Track %u",
toctn.strack, toctn.etrack);
#endif /* VERBOSE_FUNCTION_TOC */
IsoAddTNToTOC(isofile, toctn);
retval = ActualFileRead(tochandle, sizeof(struct tocTD), (char *) & toctd);
if (retval < sizeof(struct tocTD))
{
ActualFileClose(tochandle);
tochandle = ACTUALHANDLENULL;
return(-1);
} // ENDIF- Trouble reading the 'toc' file?
if (toctd.type != 0)
{
ActualFileClose(tochandle);
tochandle = ACTUALHANDLENULL;
return(-1);
} // ENDIF- Track numbers out of range?
#ifdef VERBOSE_FUNCTION_TOC
PrintLog("CDVDiso TOC: Total Sectors: %lu", toctd.lsn);
#endif /* VERBOSE_FUNCTION_TOC */
IsoAddTDToTOC(isofile, 0xAA, toctd);
for (i = toctn.strack; i <= toctn.etrack; i++)
{
retval = ActualFileRead(tochandle, sizeof(struct tocTD), (char *) & toctd);
if (retval < sizeof(struct tocTD))
{
ActualFileClose(tochandle);
tochandle = ACTUALHANDLENULL;
return(-1);
} // ENDIF- Trouble reading the 'toc' file?
#ifdef VERBOSE_FUNCTION_TOC
PrintLog("CDVDiso TOC: Track %u Type %u Sector Start: %lu",
i, toctd.type, toctd.lsn);
#endif /* VERBOSE_FUNCTION_TOC */
IsoAddTDToTOC(isofile, i, toctd);
} // NEXT i- read in each track
} // ENDIF- Not a DVD? (Then read in CD track data)
ActualFileClose(tochandle);
tochandle = ACTUALHANDLENULL;
return(0);
} // END IsoLoadTOC()
// External functions
struct IsoFile *IsoFileOpenForRead(const char *filename)
{
struct IsoFile *newfile;
int retval;
int i;
char tempblock[2448];
struct tocTN toctn;
struct tocTD toctd;
// union {
// struct ECMA119PrimaryVolume vol;
// char ch[sizeof(struct ECMA119PrimaryVolume)];
// } *volcheck;
union
{
struct ECMA119PrimaryVolume *vol;
char *ch;
} volcheck;
newfile = NULL;
if (filename == NULL) return(NULL);
#ifdef VERBOSE_FUNCTION_ISOFILE
PrintLog("CDVD isofile: IsoFileOpenForRead(%s)", filename);
#endif /* VERBOSE_FUNCTION_ISOFILE */
newfile = (struct IsoFile *) malloc(sizeof(struct IsoFile));
if (newfile == NULL) return(NULL);
newfile->sectorpos = 0;
newfile->openforread = 1; // Read-only ISO
newfile->filebytepos = 0;
newfile->filesectorpos = 0;
newfile->blocksize = 0; // Flags as non-detected yet (Compress vs. Image)
newfile->tabledata = NULL;
newfile->namepos = 0;
while ((newfile->namepos < 255) &&
(*(filename + newfile->namepos) != 0))
{
newfile->name[newfile->namepos] = *(filename + newfile->namepos);
newfile->namepos++;
} // ENDWHILE- copying the file name in...
newfile->name[newfile->namepos] = 0; // And 0-terminate.
IsoNameStripExt(newfile); // Ex: -I00.Z[.bin]
// File Compression name detection
newfile->compress = IsoNameStripCompress(newfile); // Ex: -I00.bin[.Z]
newfile->compresspos = newfile->namepos;
// Test File name compression
retval = -1;
if (newfile->compress > 0)
{
retval = CompressOpenForRead(newfile);
if (retval == -1) CompressClose(newfile);
} // ENDIF- Have a compression type hint? Test it out
if (retval == -1)
{
newfile->compress = 5;
while ((newfile->compress > 0) && (retval == -1))
{
retval = CompressOpenForRead(newfile);
if (retval == -1)
{
CompressClose(newfile);
newfile->compress--;
} // ENDIF- Failed to open? Close it... and try the next one.
} // ENDWHILE- Trying to find a compression scheme that will work...
if (newfile->compress == 0)
{
newfile->handle = ActualFileOpenForRead(newfile->name);
if (newfile->handle == ACTUALHANDLENULL)
{
free(newfile);
newfile = NULL;
return(NULL);
} // ENDIF- Failed to open? Abort.
newfile->filebytesize = ActualFileSize(newfile->handle);
} // ENDIF- No compression? Open it uncompressed.
} // ENDIF- Temp- failed to open? Abort...
// Compressed data file with no table? Return prematurely...
// Condition detection: compress > 0, tablehandle == ACTUALHANDLENULL
if (retval == -2)
{
#ifdef VERBOSE_FUNCTION_ISOFILE
PrintLog("CDVD isofile: Data file with no table!");
#endif /* VERBOSE_FUNCTION_ISOFILE */
return(newfile);
} // ENDIF-
newfile->imagetype = DetectImageType(newfile);
if (newfile->compress == 0)
{
newfile->filesectorsize = newfile->filebytesize / newfile->blocksize;
} // ENDIF- Now that blocksize is known, raw file sectors can be figured out
IsoNameStripExt(newfile); // Ex: -I00[.bin].Z
IsoNameStripMulti(newfile); // Ex: [-I00].bin.Z
#ifdef VERBOSE_DISC_INFO
PrintLog("CDVD isofile: Filename: %s", filename);
if (newfile->multi > 0) PrintLog("CDVD isofile: Multiple <2GB files.");
PrintLog("CDVD isofile: Compression Method: %s",
compressdesc[newfile->compress]);
PrintLog("CDVD isofile: Image Type: %s",
newfile->imagename);
PrintLog("CDVD isofile: Block Size: %lli", newfile->blocksize);
PrintLog("CDVD isofile: Total Sectors (of first file): %lli",
newfile->filesectorsize);
#endif /* VERBOSE_DISC_INFO */
// Load a TOC from a .toc file (is there is one)
retval = IsoLoadTOC(newfile);
if (retval == 0) return(newfile);
// Get the volume sector for disc type test
retval = IsoFileSeek(newfile, 16);
if (retval < 0)
{
newfile = IsoFileClose(newfile);
return(NULL);
} // ENDIF- Could not find the directory sector? Abort.
retval = IsoFileRead(newfile, tempblock);
if (retval < 0)
{
newfile = IsoFileClose(newfile);
return(NULL);
} // ENDIF- Could not read the directory sector? Abort.
volcheck.ch = tempblock;
volcheck.ch += newfile->blockoffset;
if (ValidateECMA119PrimaryVolume(volcheck.vol) != 0)
{
#ifdef VERBOSE_DISC_INFO
PrintLog("CDVD isofile: Not an ISO9660 disc! Music CD perhaps?");
#endif /* VERBOSE_DISC_INFO */
newfile->cdvdtype = CDVD_TYPE_CDDA;
}
else
{
// Is this a playstation image?
i = 0;
while ((*(playstationid + i) != 0) &&
(*(playstationid + i) == tempblock[newfile->blockoffset + 8 + i])) i++;
if (*(playstationid + i) != 0)
{
#ifdef VERBOSE_DISC_INFO
PrintLog("CDVD isofile: Not a Playstation Disc!");
#endif /* VERBOSE_DISC_INFO */
newfile->cdvdtype = CDVD_TYPE_DVDV;
}
else
{
newfile->cdvdtype = CDVD_TYPE_PS2DVD;
} // ENDIF- Is this not a Playstation 1 image?
// Sidenote: if the emulator is just playing Playstation 2 images, we could
// just invalidate the image file right here.
} // ENDIF- Not an ISO9660 disc? Assume Music CD.
if (newfile->cdvdtype == CDVD_TYPE_PS2DVD)
{
// Is this a Playstation CD image?
i = 0;
while ((*(cdname + i) != 0) &&
(*(cdname + i) == tempblock[newfile->blockoffset + 1024 + i])) i++;
if (*(cdname + i) == 0)
{
newfile->cdvdtype = CDVD_TYPE_PSCD;
#ifdef VERBOSE_DISC_INFO
PrintLog("CDVD isofile: Image is a Playstation 1 CD.");
#endif /* VERBOSE_DISC_INFO */
}
else
{
if (newfile->blocksize != 2048)
{
newfile->cdvdtype = CDVD_TYPE_PS2CD;
#ifdef VERBOSE_DISC_INFO
PrintLog("CDVD isofile: Image is a Playstation 2 CD.");
#endif /* VERBOSE_DISC_INFO */
}
else
{
#ifdef VERBOSE_DISC_INFO
PrintLog("CDVD isofile: Image is a DVD.");
#endif /* VERBOSE_DISC_INFO */
} // ENDIF- Is the blocksize not 2048? CD image then.
} // ENDIF- Is this a PS1 CD image?
} // ENDIF- Is this a Playstation image?
volcheck.ch = NULL;
if ((newfile->cdvdtype == CDVD_TYPE_DVDV) &&
(newfile->blocksize == 2352)) newfile->cdvdtype = CDVD_TYPE_CDDA;
// Slap together a TOC based on the above guesswork.
IsoInitTOC(newfile);
if ((newfile->cdvdtype != CDVD_TYPE_PS2DVD) &&
(newfile->cdvdtype != CDVD_TYPE_DVDV))
{
toctn.strack = 1;
toctn.etrack = 1;
IsoAddTNToTOC(newfile, toctn);
toctd.type = 0;
toctd.lsn = newfile->filesectorsize;
IsoAddTDToTOC(newfile, 0xAA, toctd);
toctd.type = 0; // ?
if (newfile->cdvdtype == CDVD_TYPE_CDDA)
{
toctd.type = CDVD_AUDIO_TRACK; // Music track assumed
}
else
{
toctd.type = CDVD_MODE1_TRACK; // Data track assumed
} // ENDIF- Is this track a music or data track?
toctd.lsn = 0;
IsoAddTDToTOC(newfile, 1, toctd);
} // ENDIF- Is this a CD? Single track for all sectors
return(newfile);
} // END IsoFileOpenForRead()