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Line 205: − + − There are at least 2 known types of this part:+ − − + − + + + + + + − + − | Used in Super Smash Bros. Brawl + − + − | Used in other games. − + + Line 234:
Line 239: + + + + + + + + + + + + − + − + − The file contains one of this structure for each track+ + − + − ! Size − + − + − | Marker − + − + − | Offset to track description − + − The file contains one of this structure for each track+ + Line 280:
Line 296: − + − The file contains one of this structure for each track Line 340:
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Line 427: − + − It seems to contain some other ADPCM table.+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
→HEAD chunk part 1: Fix variable name
All the offsets are absolute (from beginning of file), except where mentioned.<br/>
All the offsets are absolute (from beginning of file), except where mentioned.<br/>
All the sizes are in bytes, except where mentioned.<br/>
All the sizes are in bytes, except where mentioned.<br/>
Each chunk is padded to a multiple of 0x20.<br/>
=== BRSTM header ===
=== BRSTM header ===
| 0x0030
| 0x0030
| 4
| 4
| Bits per sample? (0x04 for 4-bit ADPCM)
| Bytes per entry in the ADPC table
|}
|}
==== HEAD chunk part 2 ====
==== HEAD chunk part 2 ====
===== Header =====
{| class="wikitable"
{| class="wikitable"
|-
|-
! Type
! Offset
! Marker
! Size
! Description
! Description
|-
|-
| 0x0000
| 1
| Number of tracks
|-
| 0x0001
| 1
| 1
| 0x01000000
| Track Description Type
|-
|-
| 0x0002
| 2
| 2
| 0x01010000
| Padding? (0x00)
|}
|}
===== Header =====
===== Offset table =====
The header contains one of this structure for each track
{| class="wikitable"
{| class="wikitable"
|-
|-
|-
|-
| 0x0000
| 0x0000
| 1
| 0x01
|-
| 0x0001
| 1
| Track description type
|-
| 0x0002
| 2
| Padding? (0x00)
|-
| 0x0004
| 4
| 4
| Marker
| Offset to track description
|}
|}
===== Offset table =====
===== Track Descriptions =====
There are at least 2 known types of track descriptions:
{| class="wikitable"
{| class="wikitable"
|-
|-
! Offset
! Type
! Description
! Description
|-
|-
| 0x0000
| 0
| 4
| Used in Super Smash Bros. Brawl
|-
|-
| 0x0004
| 1
| 4
| Used in other games.
|}
|}
===== Track Description Type 1 =====
The header contains one track description for each track
====== Track Description Type 0 ======
{| class="wikitable"
{| class="wikitable"
|-
|-
|}
|}
===== Track Description Type 2 =====
====== Track Description Type 1 ======
{| class="wikitable"
{| class="wikitable"
|-
|-
===== Offset table =====
===== Offset table =====
The file contains one of this structure for each channel
The header contains one of this structure for each channel
{| class="wikitable"
{| class="wikitable"
|-
|-
===== ADPCM Channel Information =====
===== ADPCM Channel Information =====
The file contains one of this structure for each channel.
The header contains one of this structure for each channel.
{| class="wikitable"
{| class="wikitable"
|-
|-
| 0x002C
| 0x002C
| 2
| 2
| History sample 1
| History sample 1 (Sample - 1)
|-
|-
| 0x002E
| 0x002E
| 2
| 2
| History sample 2
| History sample 2 (Sample - 2)
|-
|-
| 0x0030
| 0x0030
| 2
| 2
| Loop predictor/scale
| Loop predictor/scale<br/>
If BRSTM doesn't loop, these will be the same as the initial predictor/scale and history.
|-
|-
| 0x0032
| 0x0032
| 2
| 2
| Loop History sample 1
| Loop History sample 1 (Sample - 1)
|-
|-
| 0x0034
| 0x0034
| 2
| 2
| Loop History sample 2
| Loop History sample 2 (Sample - 2)
|-
|-
| 0x0036
| 0x0036
=== ADPC chunk ===
=== ADPC chunk ===
The ADPC chunk is typically 1216 bytes long.
The ADPC chunk contains 2 PCM history samples per channel for every entry in the table.<br/>
The number of samples per entry is specified in the HEAD chunk.<br/>
Each entry in the table contains the final two samples from the preceding block.<br/>
The first entry in the table contains the history samples contained in part 3 of the HEAD chunk.
==== Header ====
{| class="wikitable"
|-
! Offset
! Size
! Description
|-
| 0x0000
| 4
| "ADPC" (0x41445043)
|-
| 0x0004
| 4
| Length of entire ADPC section.
|}
==== ADPC table entry====
The size of each entry is the channel count * 4
{| class="wikitable"
|-
! Offset
! Size
! Description
|-
| 0x0000
| 2
| Channel 0 History sample 1
|-
| 0x0002
| 2
| Channel 0 History sample 2
|-
| 0x0004
| 2
| Channel 1 History sample 1
|-
| 0x0006
| 2
| Channel 1 History sample 2
|-
| ...
| 2
| Channel N History sample 1
|-
| ...
| 2
| Channel N History sample 2
|}
=== DATA chunk ===
=== DATA chunk ===
The DATA chunk contains ADPCM sound data.
The DATA chunk contains ADPCM sound data.
==== Header ====
{| class="wikitable"
|-
! Offset
! Size
! Description
|-
| 0x0000
| 4
| "DATA" (0x44415441)
|-
| 0x0004
| 4
| Length of entire DATA section.
|-
| 0x0008
| 4
| Number of padding samples between header and ADPCM data? Always 0x18
|-
| 0x000C
| 0x14
| Padding (0x00)
|}
==== ADPCM Data ====
The ADPCM audio data is interlaced per channel according to the block sizes specified in the header.
{| class="wikitable"
|-
! Description
! Size
|-
| Channel 0 block 0
| Block size
|-
| Channel 1 block 0
| Block size
|-
| Channel 0 block 1
| Block size
|-
| Channel 1 block 1
| Block size
|-
| ...
|
|-
| Channel 0 final block
| Final block size
|-
| Channel 1 final block
| Final block size
|}
[[Category:File formats]]
[[Category:File formats]]