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bcwav file...
[[Category:File formats]]
This document is about the format of Banner's CTR Wave files (BCWAV).
The structure is very similar to Microsoft's Wave file.
=== Overview ===
Microsoft's Wave structure is RIFF Header which defines the data inside which is WAVE.
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 ===
{| class="wikitable" border="1"
|-
! OFFSET !! SIZE !! DESCRIPTION
|-
| 0x000 || 4 || Magic (CWAV)
|-
| 0x004 || 2 || Endianess (0xFEFF=LE / 0xFFFE=BE)
|-
| 0x006 || 2 || Struct Length
|-
| 0x008 || 4 || Unknown 0
|-
| 0x00C || 4 || File's size
|-
| 0x010 || 4 || Number of chunks (= 2 (INFO & DATA))
|-
| 0x014 || 4 || Info Chunk Flags (0x7000)
|-
| 0x018 || 4 || Info Chunk Offset
|-
| 0x01C || 4 || Info Chunk Length
|-
| 0x020 || 4 || Data Chunk Flags (0x7000)
|-
| 0x024 || 4 || Data Chunk Offset
|-
| 0x028 || 4 || Data Chunk Length
|-
| 0x02C || 0x20 || Reserved (for more chunks offsets)
|}
=== INFO Header ===
{| class="wikitable" border="1"
|-
! OFFSET !! SIZE !! DESCRIPTION
|-
| 0x000 || 4 || Magic (INFO)
|-
| 0x004 || 4 || Length
|-
| 0x008 || 4 || Type
|-
| 0x00C || 4 || Sample Rate
|-
| 0x010 || 4 || Unknown 1
|-
| 0x014 || 4 || Number or samples
|-
| 0x018 || 4 || Unknown 2
|-
| 0x01C || 4 || Channels
|-
| 0x020 || X || The Channels' Data Pointers
|-
| X || X || The Channels' Data
|}
* The channels data pointers are pointers to another struct that points to the actual data (this stucture has flags as well)
{| class="wikitable" border="1"
|-
! OFFSET !! SIZE !! DESCRIPTION
|-
| 0x000 || 4 || Flags
|-
| 0x004 || 4 || Offset (from 0x5C, INFO's channels field)
|}
* The channels data are pointers to the actual data (this stucture has flags as well)
{| class="wikitable" border="1"
|-
! OFFSET !! SIZE !! DESCRIPTION
|-
| 0x000 || 4 || Flags
|-
| 0x004 || 4 || Offset (inside the DATA block data)
|-
| 0x008 || 4 || FFs (0xFFFFFFFF)
|-
| 0x00C || 4 || Padding (Zero)
|}
=== DATA Header ===
{| class="wikitable" border="1"
|-
! OFFSET !! SIZE !! DESCRIPTION
|-
| 0x000 || 4 || Magic (DATA)
|-
| 0x004 || 4 || Length
|}
This document is about the format of Banner's CTR Wave files (BCWAV).
The structure is very similar to Microsoft's Wave file.
=== Overview ===
Microsoft's Wave structure is RIFF Header which defines the data inside which is WAVE.
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 ===
{| class="wikitable" border="1"
|-
! OFFSET !! SIZE !! DESCRIPTION
|-
| 0x000 || 4 || Magic (CWAV)
|-
| 0x004 || 2 || Endianess (0xFEFF=LE / 0xFFFE=BE)
|-
| 0x006 || 2 || Struct Length
|-
| 0x008 || 4 || Unknown 0
|-
| 0x00C || 4 || File's size
|-
| 0x010 || 4 || Number of chunks (= 2 (INFO & DATA))
|-
| 0x014 || 4 || Info Chunk Flags (0x7000)
|-
| 0x018 || 4 || Info Chunk Offset
|-
| 0x01C || 4 || Info Chunk Length
|-
| 0x020 || 4 || Data Chunk Flags (0x7000)
|-
| 0x024 || 4 || Data Chunk Offset
|-
| 0x028 || 4 || Data Chunk Length
|-
| 0x02C || 0x20 || Reserved (for more chunks offsets)
|}
=== INFO Header ===
{| class="wikitable" border="1"
|-
! OFFSET !! SIZE !! DESCRIPTION
|-
| 0x000 || 4 || Magic (INFO)
|-
| 0x004 || 4 || Length
|-
| 0x008 || 4 || Type
|-
| 0x00C || 4 || Sample Rate
|-
| 0x010 || 4 || Unknown 1
|-
| 0x014 || 4 || Number or samples
|-
| 0x018 || 4 || Unknown 2
|-
| 0x01C || 4 || Channels
|-
| 0x020 || X || The Channels' Data Pointers
|-
| X || X || The Channels' Data
|}
* The channels data pointers are pointers to another struct that points to the actual data (this stucture has flags as well)
{| class="wikitable" border="1"
|-
! OFFSET !! SIZE !! DESCRIPTION
|-
| 0x000 || 4 || Flags
|-
| 0x004 || 4 || Offset (from 0x5C, INFO's channels field)
|}
* The channels data are pointers to the actual data (this stucture has flags as well)
{| class="wikitable" border="1"
|-
! OFFSET !! SIZE !! DESCRIPTION
|-
| 0x000 || 4 || Flags
|-
| 0x004 || 4 || Offset (inside the DATA block data)
|-
| 0x008 || 4 || FFs (0xFFFFFFFF)
|-
| 0x00C || 4 || Padding (Zero)
|}
=== DATA Header ===
{| class="wikitable" border="1"
|-
! OFFSET !! SIZE !! DESCRIPTION
|-
| 0x000 || 4 || Magic (DATA)
|-
| 0x004 || 4 || Length
|}