BigFile
BigFile is the container format employed by Ubisoft for Revelation. All of Revelation's data is contained in BigFiles.
coderjo wrote some Python scripts for manipulating BigFiles.
BigFiles are little-endian, and have the .m4b file extension.
BigFile structure
| Name | Type | Description |
|---|---|---|
| magic | BasicString |
Magic signature. Must be "UBI_BF_SIG\0". |
| version | uint32 |
Must be 0x1. No other version is known. |
| root | FatDirectory |
root.name must be empty. |
| fileTable | ... | Table of files described in root. |
FatDirectory structure
Describes a single directory contained in a BigFile.
| Name | Type | Description |
|---|---|---|
| name | BasicString |
In source material, all non-empty directory names have a redundant null-terminator. |
| nSubDirs | uint8 |
|
| subDirs | FatDirectory[nSubDirs] |
|
| files | Array<FatFile> |
FatFile structure
Describes a single file contained in a BigFile.
| Name | Type | Description |
|---|---|---|
| name | BasicString |
In source material, all non-empty file names have a redundant null-terminator. |
| size | uint32 |
|
| pos | uint32 |
File's absolute start position in its containing BigFile. |