BCWAV: Difference between revisions

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B doesn't stand for Banner, but for Binary (same all of the other NW4C related file formats).
 
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[[Category:File formats]]
[[Category:File formats]]
This document is about the format of Banner's CTR Wave files (BCWAV).
This document is about the format of Binary CTR Wave files (BCWAV). The structure is very similar to Microsoft's Wave file.
 
The structure is very similar to Microsoft's Wave file.
 
Banner CWAV total channels must be 2, and the length of the audio in seconds must be 3 seconds or less.


=== Overview ===
=== Overview ===


Microsoft's Wave structure is RIFF Header which defines the data inside which is WAVE.
Microsoft's WAV structure is RIFF Header which defines the data inside which is WAVE, then the media player expects a "fmt " chunk and a "data" chunk. Nintendo's format uses a CWAV header (no need for a general structure for media, only wave), which points to an INFO struct (the equivalent to fmt) and a DATA struct (the equivalent to data).
 
then the media player expects "fmt " chunk and a "data" chunk.
 
Nintendo's format uses a CWAV Header (no need for a general structure for media, only wave)
 
Which points to an INFO struct (the equivalent to fmt) and a DATA struct (the equivalent to data).


=== Header ===
=== Header ===
Line 26: Line 16:
| 0x004 || 2 || Endianness (0xFEFF = little, 0xFFFE = big)
| 0x004 || 2 || Endianness (0xFEFF = little, 0xFFFE = big)
|-
|-
| 0x006 || 2 || Header Size (0x40)
| 0x006 || 2 || Header Size (0x40 due to [[#Info Block|Info Block]] alignment)
|-
|-
| 0x008 || 4 || Version (0x02010000)
| 0x008 || 4 || Version (0x02010000)
Line 36: Line 26:
| 0x012 || 2 || Reserved
| 0x012 || 2 || Reserved
|-
|-
| 0x014 || 12 || [[BCWAV#Info Block|Info Block]] [[BCWAV#Sized Reference|Sized Reference]] (Offset relative to start of file)
| 0x014 || 12 || [[#Info Block|Info Block]] [[#Sized Reference|Sized Reference]] (Offset relative to start of file)
|-
|-
| 0x020 || 12 || [[BCWAV#Data Block|Data Block]] [[BCWAV#Sized Reference|Sized Reference]] (Offset relative to start of file)
| 0x020 || 12 || [[#Data Block|Data Block]] [[#Sized Reference|Sized Reference]] (Offset relative to start of file)
|-
| 0x02C || 20 || Padding
|}
|}


Line 60: Line 48:
! MAGIC !! TYPE
! MAGIC !! TYPE
|-
|-
| INFO || [[BCWAV#Info Block|Info Block]]
| INFO || [[#Info Block|Info Block]]
|-
|-
| DATA || [[BCWAV#Data Block|Data Block]]
| DATA || [[#Data Block|Data Block]]
|}
|}


Line 71: Line 59:
! OFFSET !! SIZE !!  DESCRIPTION
! OFFSET !! SIZE !!  DESCRIPTION
|-
|-
| 0x000 || 8 || [[BCWAV#Block Header|Block Header]]
| 0x000 || 8 || [[#Block Header|Block Header]]
|-
|-
| 0x008 || 1 || [[BCWAV#Encoding|Encoding]]
| 0x008 || 1 || [[#Encoding|Encoding]]
|-
|-
| 0x009 || 1 || Loop (0 = don't loop, 1 = loop)
| 0x009 || 1 || Loop (0 = don't loop, 1 = loop)
Line 87: Line 75:
| 0x018 || 4 || Reserved
| 0x018 || 4 || Reserved
|-
|-
| 0x01C || 4 + Count * 8 || [[BCWAV#Channel Info|Channel Info]] [[BCWAV#Reference Table|Reference Table]]
| 0x01C || X || [[#Channel Info|Channel Info]] [[#Reference Table|Reference Table]]
|-
| X || X || [[#Channel Info|Channel Info]] Entries
|}
|}


=== Data Block ===
If encoding is DSP ADPCM:


{| class="wikitable" border="1"
{| class="wikitable" border="1"
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! OFFSET !! SIZE !!  DESCRIPTION
! OFFSET !! SIZE !!  DESCRIPTION
|-
|-
| 0x000 || 8 || [[BCWAV#Block Header|Block Header]]
| X || X || [[#DSP ADPCM Info|DSP ADPCM Info]] Entries
|}
 
If encoding is IMA ADPCM:
 
{| class="wikitable" border="1"
|-
! OFFSET !! SIZE !!  DESCRIPTION
|-
|-
| 0x008 || [[BCWAV#Block Header|Block Header]] Size - 8 || Data
| X || X || [[#IMA ADPCM Info|IMA ADPCM Info]] Entries
|}
|}


=== Encoding ===
The info block is aligned to 0x20 bytes.
 
==== Encoding ====


{| class="wikitable" border="1"
{| class="wikitable" border="1"
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|}
|}


=== Channel Info ===
==== Channel Info ====


{| class="wikitable" border="1"
{| class="wikitable" border="1"
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! OFFSET !! SIZE !!  DESCRIPTION
! OFFSET !! SIZE !!  DESCRIPTION
|-
|-
| 0x000 || 8 || Samples [[BCWAV#Reference|Reference]] (Offset relative to [[BCWAV#Data Block|Data Block]] Data field)
| 0x000 || 8 || Samples [[#Reference|Reference]] (Offset relative to [[#Data Block|Data Block]] Data field)
|-
|-
| 0x008 || 8 || ADPCM Info [[BCWAV#Reference|Reference]]  (Offset relative to [[BCWAV#Channel Info|Channel Info]] start)
| 0x008 || 8 || ADPCM Info [[#Reference|Reference]]  (Offset relative to Samples [[#Reference|Reference]] field)
|-
|-
| 0x010 || 4 || Reserved
| 0x010 || 4 || Reserved
|}
|}


=== DSP ADPCM Info ===
===== DSP ADPCM Info =====


{| class="wikitable" border="1"
{| class="wikitable" border="1"
Line 135: Line 134:
! OFFSET !! SIZE !!  DESCRIPTION
! OFFSET !! SIZE !!  DESCRIPTION
|-
|-
| 0x000 || 32 || [[BCWAV#DSP ADPCM Param|Param]]
| 0x000 || 32 || [[#DSP ADPCM Param|Param]]
|-
| 0x020 || 6 || [[#DSP ADPCM Context|Context]]
|-
|-
| 0x020 || 6 || [[BCWAV#DSP ADPCM Context|Context]]
| 0x026 || 6 || Loop [[#DSP ADPCM Context|Context]]
|-
|-
| 0x026 || 6 || Loop [[BCWAV#DSP ADPCM Context|Context]]
| 0x02C || 2 || Padding
|}
|}


=== DSP ADPCM Param ===
====== DSP ADPCM Param ======


{| class="wikitable" border="1"
{| class="wikitable" border="1"
Line 151: Line 152:
|}
|}


=== DSP ADPCM Context ===
====== DSP ADPCM Context ======


{| class="wikitable" border="1"
{| class="wikitable" border="1"
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|}
|}


=== IMA ADPCM Info ===
===== IMA ADPCM Info =====


{| class="wikitable" border="1"
{| class="wikitable" border="1"
Line 172: Line 173:
! OFFSET !! SIZE !!  DESCRIPTION
! OFFSET !! SIZE !!  DESCRIPTION
|-
|-
| 0x000 || 4 || [[BCWAV#IMA ADPCM Context|Context]]
| 0x000 || 4 || [[#IMA ADPCM Context|Context]]
|-
|-
| 0x004 || 4 || Loop [[BCWAV#IMA ADPCM Context|Context]]
| 0x004 || 4 || Loop [[#IMA ADPCM Context|Context]]
|}
|}


=== IMA ADPCM Context ===
====== IMA ADPCM Context ======


{| class="wikitable" border="1"
{| class="wikitable" border="1"
Line 189: Line 190:
| 0x003 || 1 || Padding
| 0x003 || 1 || Padding
|}
|}
=== Data Block ===
{| class="wikitable" border="1"
|-
! OFFSET !! SIZE !!  DESCRIPTION
|-
| 0x000 || 8 || [[#Block Header|Block Header]]
|-
| 0x008 || [[#Block Header|Block Header]] Size Value - 8 || Data
|}
The data block is aligned to 0x20 bytes, as well as the data field's actual sample data.


=== Reference Table ===
=== Reference Table ===
Line 198: Line 212:
| 0x000 || 4 || Count
| 0x000 || 4 || Count
|-
|-
| 0x004 || Count * 8 || [[BCWAV#Reference|References]] (Offsets relative to Count field)
| 0x004 || Count * 8 || [[#Reference|References]] (Offsets relative to Count field)
|}
|}


Line 207: Line 221:
! OFFSET !! SIZE !!  DESCRIPTION
! OFFSET !! SIZE !!  DESCRIPTION
|-
|-
| 0x000 || 8 || [[BCWAV#Reference|Reference]]
| 0x000 || 8 || [[#Reference|Reference]]
|-
|-
| 0x008 || 4 || Size
| 0x008 || 4 || Size
Line 222: Line 236:
| 0x002 || 2 || Padding
| 0x002 || 2 || Padding
|-
|-
| 0x004 || 4 || Offset
| 0x004 || 4 || Offset ("null" = 0xFFFFFFFF)
|}
|}


Line 231: Line 245:
! ID !! TYPE
! ID !! TYPE
|-
|-
| 0x0300 || [[BCWAV#DSP ADPCM Info|DSP ADPCM Info]]
| 0x0300 || [[#DSP ADPCM Info|DSP ADPCM Info]]
|-
|-
| 0x0301 || [[BCWAV#IMA ADPCM Info|IMA ADPCM Info]]
| 0x0301 || [[#IMA ADPCM Info|IMA ADPCM Info]]
|-
|-
| 0x1F00 || [[BCWAV#Data_Block|Sample Data]]
| 0x1F00 || [[#Data_Block|Sample Data]]
|-
|-
| 0x7000 || [[BCWAV#Info Block|Info Block]]
| 0x7000 || [[#Info Block|Info Block]]
|-
|-
| 0x7001 || [[BCWAV#Data Block|Data Block]]
| 0x7001 || [[#Data Block|Data Block]]
|-
|-
| 0x7100 || [[BCWAV#Channel Info|Channel Info]]
| 0x7100 || [[#Channel Info|Channel Info]]
|}
|}

Latest revision as of 14:38, 20 December 2020

This document is about the format of Binary CTR Wave files (BCWAV). The structure is very similar to Microsoft's Wave file.

Overview

Microsoft's WAV structure is RIFF Header which defines the data inside which is WAVE, then the media player expects a "fmt " chunk and a "data" chunk. Nintendo's format uses a CWAV header (no need for a general structure for media, only wave), which points to an INFO struct (the equivalent to fmt) and a DATA struct (the equivalent to data).

Header

OFFSET SIZE DESCRIPTION
0x000 4 Magic (CWAV)
0x004 2 Endianness (0xFEFF = little, 0xFFFE = big)
0x006 2 Header Size (0x40 due to Info Block alignment)
0x008 4 Version (0x02010000)
0x00C 4 File Size
0x010 2 Number of Blocks (2)
0x012 2 Reserved
0x014 12 Info Block Sized Reference (Offset relative to start of file)
0x020 12 Data Block Sized Reference (Offset relative to start of file)

Block Header

OFFSET SIZE DESCRIPTION
0x000 4 Magic
0x004 4 Size

Block Types

MAGIC TYPE
INFO Info Block
DATA Data Block

Info Block

OFFSET SIZE DESCRIPTION
0x000 8 Block Header
0x008 1 Encoding
0x009 1 Loop (0 = don't loop, 1 = loop)
0x00A 2 Padding
0x00C 4 Sample Rate
0x010 4 Loop Start Frame
0x014 4 Loop End Frame
0x018 4 Reserved
0x01C X Channel Info Reference Table
X X Channel Info Entries

If encoding is DSP ADPCM:

OFFSET SIZE DESCRIPTION
X X DSP ADPCM Info Entries

If encoding is IMA ADPCM:

OFFSET SIZE DESCRIPTION
X X IMA ADPCM Info Entries

The info block is aligned to 0x20 bytes.

Encoding

VALUE DESCRIPTION
0 PCM8
1 PCM16
2 DSP ADPCM
3 IMA ADPCM

Channel Info

OFFSET SIZE DESCRIPTION
0x000 8 Samples Reference (Offset relative to Data Block Data field)
0x008 8 ADPCM Info Reference (Offset relative to Samples Reference field)
0x010 4 Reserved
DSP ADPCM Info
OFFSET SIZE DESCRIPTION
0x000 32 Param
0x020 6 Context
0x026 6 Loop Context
0x02C 2 Padding
DSP ADPCM Param
OFFSET SIZE DESCRIPTION
0x000 32 16-bit Coefficients
DSP ADPCM Context
OFFSET SIZE DESCRIPTION
0x000 1 4-bit Predictor + 4-bit Scale
0x001 1 Reserved
0x002 2 Previous Sample
0x004 2 Second Previous Sample
IMA ADPCM Info
OFFSET SIZE DESCRIPTION
0x000 4 Context
0x004 4 Loop Context
IMA ADPCM Context
OFFSET SIZE DESCRIPTION
0x000 2 Data
0x002 1 Table Index
0x003 1 Padding

Data Block

OFFSET SIZE DESCRIPTION
0x000 8 Block Header
0x008 Block Header Size Value - 8 Data

The data block is aligned to 0x20 bytes, as well as the data field's actual sample data.

Reference Table

OFFSET SIZE DESCRIPTION
0x000 4 Count
0x004 Count * 8 References (Offsets relative to Count field)

Sized Reference

OFFSET SIZE DESCRIPTION
0x000 8 Reference
0x008 4 Size

Reference

OFFSET SIZE DESCRIPTION
0x000 2 Type ID
0x002 2 Padding
0x004 4 Offset ("null" = 0xFFFFFFFF)

Reference Types

ID TYPE
0x0300 DSP ADPCM Info
0x0301 IMA ADPCM Info
0x1F00 Sample Data
0x7000 Info Block
0x7001 Data Block
0x7100 Channel Info
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