NNV Format
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NNV Format
| Format type | Archive |
|---|---|
| Max files | 255 |
| File Allocation Table (FAT) | Embedded |
| Filenames? | No |
| Metadata? | None |
| Supports compression? | No |
| Supports encryption? | No |
| Supports subdirectories? | No |
| Hidden data? | Yes |
| Games |
The NNV format is used to store audio data for Nomad. The archive format itself is trivial, but the contained audio data requires delta decoding.
File format
Header
The file starts with a single field indicating the number of files present.
| Data type | Description |
|---|---|
| BYTE numFiles | File count |
File entry
After the single byte file count, the following structure is repeated numFiles times. As each entry includes both an offset and a size, it is possible (in theory) for two different files to share the same data, for a file to be zero-length, or to insert “hidden” data between files.
| Data type | Description |
|---|---|
| UINT32LE offset | Offset within the .NNV archive at which this file's data starts |
| UINT32LE size | Size of the contained file |
Audio data format
The sound data itself is encoded with a 4-bit delta PCM scheme. It represents a single channel of unsigned 8-bit PCM audio intended for playback at 7042Hz. See Nomad Sound Format.