The BRSTM (Binary Revolution STreaM) file format is used for storing music streams on Wii.
File Format
The file starts with the following header:
| Offset |
Type |
Description
|
| 0x00 |
Char[4] |
File magic. Always RSTM in ASCII.
|
| 0x04 |
UInt16 |
Byte-order-mark. FE FF for big endian, FF FE for little endian.
|
| 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 |
HEAD offset.
|
| 0x14 |
UInt32 |
HEAD section size in bytes.
|
| 0x18 |
UInt32 |
ADPC offset.
|
| 0x1C |
UInt32 |
ADPC section size in bytes.
|
| 0x20 |
UInt32 |
DATA offset.
|
| 0x24 |
UInt32 |
DATA section size in bytes.
|
Reference
| Offset |
Type |
Description
|
| 0x00 |
Byte |
Type ID. Stores the pointer type, 0 means it's an absolute address in memory and 1 means it's an offset relative to a value in the file.
|
| 0x01 |
Byte |
Data type. A reference can link to different structs depending, this value specifies which one. Up to 4 different structs can be used.
|
| 0x02 |
Byte[2] |
Padding.
|
| 0x04 |
UInt32 |
Offset.
|
HEAD
Data Info
| Offset |
Type |
Description
|
| 0x00 |
Byte |
Sound encoding.
| ID |
Description
|
| 0x00 |
PCM 8
|
| 0x01 |
PCM 16
|
| 0x02 |
DSP ADPCM
|
|
| 0x01 |
Byte |
Loop flag.
|
| 0x02 |
Byte |
Number of channels.
|
| 0x03 |
Byte |
Sample rate 24. Contains the upper byte of a 24-bit value.
|
| 0x04 |
UInt16 |
Sample rate.
|
| 0x06 |
UInt16 |
Block header start.
|
| 0x08 |
UInt32 |
Loop start in frames.
|
| 0x0C |
UInt32 |
Loop end in frames.
|
| 0x10 |
UInt32 |
DATA offset.
|
| 0x14 |
UInt32 |
Number of stream blocks.
|
| 0x18 |
UInt32 |
Stream block size in bytes.
|
| 0x1C |
UInt32 |
Stream block size in samples.
|
| 0x20 |
UInt32 |
Last stream block size in bytes.
|
| 0x24 |
UInt32 |
Last stream block size in samples.
|
| 0x28 |
UInt32 |
Last stream block size in bytes, including padding.
|
| 0x2C |
UInt32 |
ADPCM data interval.
|
| 0x30 |
UInt32 |
ADPCM data size.
|
Track Info Table
| Offset |
Type |
Description
|
| 0x00 |
Byte |
Number of track infos.
|
| 0x01 |
Byte |
Data type.
|
| 0x02 |
Byte[2] |
Padding.
|
After comes an array of references which points to each track info.
Track Info
- Data type 0
| Offset |
Type |
Description
|
| 0x00 |
Byte |
Number of channels (N).
|
| 0x01 |
Byte[N] |
Channel index table.
|
- Data type 1
| Offset |
Type |
Description
|
| 0x00 |
Byte |
Volume.
|
| 0x01 |
Byte |
Pan.
|
| 0x02 |
Byte[2] |
Padding.
|
| 0x04 |
UInt32 |
Reserved.
|
| 0x08 |
Byte |
Number of channels (N).
|
| 0x09 |
Byte[N] |
Channel index table.
|
Channel Info Table
| Offset |
Type |
Description
|
| 0x00 |
Byte |
Number of channel infos.
|
| 0x01 |
Byte[3] |
Padding.
|
After comes an array of references which points to each channel info.
Channel Info
A channel info contains data used to decode DSP ADPCM sound data. Each entry has the following structure:
| 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.
|
ADPC
| Offset |
Type |
Description
|
| 0x00 |
Char[4] |
Section magic. Always ADPC in ASCII.
|
| 0x04 |
UInt32 |
Section size in bytes.
|
| 0x08 |
UInt16[][2] |
Seek history. Contains PCM 16 samples of various parts of the stream.
|
DATA
| Offset |
Type |
Description
|
| 0x00 |
Char[4] |
Section magic. Always DATA in ASCII.
|
| 0x04 |
UInt32 |
Section size in bytes.
|
| 0x08 |
UInt32 |
Data offset, relative to this field. Points to the start of the sound data.
|
Tools
The following tools can handle BRSTM files:
- BrawlBox, by Kryal & BlackJax
