Wexos: Imported from avsys wiki

2024-05-01T17:15:19Z

Imported from avsys wiki

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'''BNS''' ('''B'''a'''N'''ner '''S'''ound) is a file format used for storing [[Wii]] channel sound data.

= File Format =
== Header ==
The file starts with the following header:

{| class="wikitable"
! Offset !! Type !! Description
|-
| 0x00 || Char[4] || '''File magic'''. Always ''BNS '' in ASCII.
|-
| 0x04 || UInt16 || {{BOM}}
|-
| 0x06 || UInt16 || '''Version number''' of the file format.
|-
| 0x08 || UInt32 || '''File size''' in bytes.
|-
| 0x0C || UInt16 || '''Header size''' in bytes.
|-
| 0x0E || UInt16 || '''Number of sections''' stored in the file.
|-
| 0x10 || UInt32 || '''[[#INFO|INFO]] offset'''.
|-
| 0x14 || UInt32 || '''[[#INFO|INFO]] section size''' in bytes.
|-
| 0x18 || UInt32 || '''[[#DATA|DATA]] offset'''.
|-
| 0x1C || UInt32 || '''[[#DATA|DATA]] section size''' in bytes.
|}

== INFO ==
The ''INFO'' section stores general information about the sound. Unlike [[BRSTM]] and [[BRWAV]], the format is always DSP ADPCM. All offsets are relative to 0x08 into the following structure:

{| class="wikitable"
! Offset !! Type !! Description
|-
| 0x00 || Char[4] || '''Section magic'''. Always ''INFO'' in ASCII.
|-
| 0x04 || UInt32 || '''Section size''' in bytes.
|-
| 0x08 || Byte || '''Dummy value''', always 0.
|-
| 0x09 || Byte || '''Loop flag'''.
|-
| 0x0A || Byte || '''Number of channels'''.
|-
| 0x0B || Byte || '''Sample rate 24'''. Contains the upper byte of a 24-bit value.
|-
| 0x0C || UInt16 || '''Sample rate'''.
|-
| 0x0E || UInt16 || '''Block header start'''.
|-
| 0x10 || UInt32 || '''Loop start''' in frames.
|-
| 0x14 || UInt32 || '''Loop end''' in frames.
|-
| 0x18 || UInt32 || '''[[#Channel|Channel]] table offset'''. Points an array of offsets which point to each [[#Channel|channel]].
|-
| 0x1C || UInt32 || {{Unknown-left|'''Unknown'''.}}
|}

=== Channel ===
Each channel has the following structure:

{| class="wikitable"
! Offset !! Type !! Description
|-
| 0x00 || UInt32 || '''Data offset''' into the sound data.
|-
| 0x04 || UInt32 || '''[[#Channel Info|Channel info]] offset'''.
|-
| 0x08 || UInt32 || {{Unknown-left|'''Unknown'''.}}
|}

==== Channel Info ====
A channel info contains data used to decode DSP ADPCM sound data. Each entry has the following structure:

{| class="wikitable"
! Offset !! Type !! Description
|-
| 0x00 || Int16[8][2] || '''Coefficients'''.
|-
| 0x20 || UInt16 || '''Gain'''.
|-
| 0x22 || UInt16 || '''Pred scale'''.
|-
| 0x24 || Int16 || '''Yn 1'''. History sample 1.
|-
| 0x26 || Int16 || '''Yn 2'''. History sample 2.
|-
| 0x28 || UInt16 || '''Loop pred scale'''.
|-
| 0x2A || Int16 || '''Loop yn 1'''. Loop history sample 1.
|-
| 0x2C || Int16 || '''Loop yn 2'''. Loop history sample 2.
|-
| 0x2E || Byte[2] || '''Padding'''.
|}

== DATA ==
{| class="wikitable"
! Offset !! Type !! Description
|-
| 0x00 || Char[4] || '''Section magic'''. Always ''DATA'' in ASCII.
|-
| 0x04 || UInt32 || '''Section size''' in bytes.
|-
| 0x08 || Byte[] || '''Sound data'''.
|}

= Tools =
The following tools can handle BNS files:
* (none)

[[Category:Wii File Formats]]

BNS (File Format) - Revision history

Wexos: Imported from avsys wiki