Difference between revisions of "Template:GRAFTemplate1"

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(Notes and Comments)
m (Reverted edits by 85.92.55.33 (Talk); changed back to last version by Dinoguy1000)
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=== Notes and Comments ===  
 
=== Notes and Comments ===  
1.
+
{{{notes}}}
In the version 24, the file names are encrypted as XOR 0xBE.
 
 
 
2.
 
"BXP" + (byte) in all headers: In the version 24, the (byte)=3. 
 
 
 
3.
 
// ARCHIVE INDEX
 
    char {8}    - Header ("BXP" + (byte)2 + "INDX")
 
    uint64 {8}  - Unknown  '''<-----  this shuld be relative offset to the first "BXP.FILE"'''
 
I have used folloxing piece of C++ code:
 
  ArchiveOffset = 0x00;
 
  IndexOffset = 0x20;
 
  TreeOffset = 0x60;
 
  DirOffset = 0x80;
 
  DataOffset = DirOffset + (__int64*) &buffer[TreeOffset + 8];
 
  FileOffset = DirOffset + (__int64*) &buffer[IndexOffset + 8];
 
 
 
4.
 
There are some directories containing both files and sub-directories. In such case, the files are listed prior to the sub-directories.
 
I guess that the structure of directory // see 6.
 
 
 
5. I have successfuly extracted all files from the archive. Sound (*.ogg) files play well, however some other files (scripts) seems to be encrypted. Further I am wholly confused with CRCs, HASHs and Paddings for now, so I can not build an modified archive.
 
 
 
6. "uint32 {4}  - Unknown (1)" is a switch: 0="file is not compressed" 1="file is compressed"; compression method is zlib (*.gz). The same switch is in the  "BXP.FILE" section.
 
I suguest that to modify the structure of "BXP.SDIR" to:
 
 
 
{
 
  char {8}    - Header ("BXP" + (byte)2 + "SDIR")
 
  uint64 {8}  - Unknown Length/Offset
 
  byte {16}    - null
 
  uint32 {4}  - Number Of Sub-Directories in this directory
 
  uint32 {4}  - Number Of Files in this directory
 
  uint64 {8}  - Length Of Filename Directory Component (length of subDirName+null + fileNames+nulls)
 
  byte {16}    - null
 
  for (each file)
 
  {
 
    uint64 {8}  - Filename Offset (relative to the start of the filename directory)
 
    uint64 {8}  - null
 
    byte {16}    - CRC?
 
    uint32 {4}  - null
 
    uint32 {4}  - A switch indicating if the file is compressed. 0=no, 1=yes //compression method: zlib (*.gz)
 
    uint64 {8}  - null
 
    uint64 {8}  - File Length (not including the file header fields?)
 
    uint64 {8}  - File Offset (relative to the start of the file data)
 
  }
 
  for (each sub-directory)
 
  {
 
    uint32 {4}  - null  // Filename Offset (relative to the start of the filename directory)
 
    uint32 {4}  - Relative Offset To This Directory? (32) (relative to the start of this subDirEntry)
 
  }
 
  for (each entry)            // entry is file or sub-directory
 
  {
 
    uint32 {4}  -  Hash? 
 
  }
 
  for (each entry)
 
  {
 
    char {X}    - Filename                        // XOR 0xBE      in version 24
 
    byte {1}    - null Filename Terminator        // 0xBE          in version 24
 
  }
 
}
 
 
 
 
 
7. First 32 bytes of each file if "File Data" is a header of checksum, which is not necessary for file extraction.
 
 
 
  {
 
    // FILE DATA
 
    char {8}    - Header ("BXP" + (byte)2 + "DATA")
 
    uint64 {8}  - Total Length Of File Data (length of everything in "// for each file")
 
    uint64 {8}  - Padding (88,39,255,135,206,225,196,1)
 
    uint64 {8}  - null
 
 
 
    for (each file)
 
    {
 
        char {8}    - Header ("BXP" + (byte)2 + "FILE")
 
        uint64 {8}  - File Length (length of "X - File Data" only) [+30]
 
        uint64 {8}  - CRC?
 
        uint32 {4}  - null
 
        uint32 {4}  - A switch indicating if the file is compressed. 0=no, 1=yes //compression method: zlib (*.gz)
 
        byte (16)    - A header or check-sum?
 
        byte (16)    - For uncompressed file the same as previous byte (16), for copressed different. Maybe check-sum of decompressed file?
 
        byte {X}    - File Data
 
        byte {X}     - null Padding to a multiple of 32 bytes
 
    }
 
  }
 
 
 
*** by Gregory
 
  
 
=== MultiEx BMS Script ===  
 
=== MultiEx BMS Script ===  

Revision as of 23:48, 1 July 2006

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{{{file_extension}}}

Format Type:   {{{format_type}}}
Endian Order:   {{{endian_order}}}
Date Posted:   {{{date_posted}}}

Format Specifications

{{{format_specifications}}}


Notes and Comments

{{{notes}}}

MultiEx BMS Script

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