Difference between revisions of "BCWAV"
Steveice10 (talk | contribs) m |
(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 | + | 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 | ||
− | |||
− | |||
=== Overview === | === Overview === | ||
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| 0x018 || 4 || Reserved | | 0x018 || 4 || Reserved | ||
|- | |- | ||
− | | 0x01C || | + | | 0x01C || X || [[#Channel Info|Channel Info]] [[#Reference Table|Reference Table]] |
+ | |- | ||
+ | | X || X || [[#Channel Info|Channel Info]] Entries | ||
|} | |} | ||
− | + | If encoding is DSP ADPCM: | |
+ | |||
+ | {| class="wikitable" border="1" | ||
+ | |- | ||
+ | ! OFFSET !! SIZE !! DESCRIPTION | ||
+ | |- | ||
+ | | X || X || [[#DSP ADPCM Info|DSP ADPCM Info]] Entries | ||
+ | |} | ||
− | + | If encoding is IMA ADPCM: | |
{| class="wikitable" border="1" | {| class="wikitable" border="1" | ||
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! OFFSET !! SIZE !! DESCRIPTION | ! OFFSET !! SIZE !! DESCRIPTION | ||
|- | |- | ||
− | | | + | | X || X || [[#IMA ADPCM Info|IMA ADPCM Info]] Entries |
− | |||
− | |||
|} | |} | ||
− | The | + | The info block is aligned to 0x20 bytes. |
− | === Encoding === | + | ==== 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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| 0x000 || 8 || Samples [[#Reference|Reference]] (Offset relative to [[#Data Block|Data Block]] Data field) | | 0x000 || 8 || Samples [[#Reference|Reference]] (Offset relative to [[#Data Block|Data Block]] Data field) | ||
|- | |- | ||
− | | 0x008 || 8 || ADPCM Info [[#Reference|Reference]] (Offset relative to [[# | + | | 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" | ||
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|} | |} | ||
− | === DSP ADPCM Param === | + | ====== DSP ADPCM Param ====== |
{| class="wikitable" border="1" | {| class="wikitable" border="1" | ||
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|} | |} | ||
− | === 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" | ||
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|} | |} | ||
− | === IMA ADPCM Context === | + | ====== IMA ADPCM Context ====== |
{| class="wikitable" border="1" | {| class="wikitable" border="1" | ||
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| 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 === |
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.
OverviewEdit
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).
HeaderEdit
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 HeaderEdit
OFFSET | SIZE | DESCRIPTION |
---|---|---|
0x000 | 4 | Magic |
0x004 | 4 | Size |
Block TypesEdit
MAGIC | TYPE |
---|---|
INFO | Info Block |
DATA | Data Block |
Info BlockEdit
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.
EncodingEdit
VALUE | DESCRIPTION |
---|---|
0 | PCM8 |
1 | PCM16 |
2 | DSP ADPCM |
3 | IMA ADPCM |
Channel InfoEdit
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 InfoEdit
OFFSET | SIZE | DESCRIPTION |
---|---|---|
0x000 | 32 | Param |
0x020 | 6 | Context |
0x026 | 6 | Loop Context |
0x02C | 2 | Padding |
DSP ADPCM ParamEdit
OFFSET | SIZE | DESCRIPTION |
---|---|---|
0x000 | 32 | 16-bit Coefficients |
DSP ADPCM ContextEdit
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 InfoEdit
OFFSET | SIZE | DESCRIPTION |
---|---|---|
0x000 | 4 | Context |
0x004 | 4 | Loop Context |
IMA ADPCM ContextEdit
OFFSET | SIZE | DESCRIPTION |
---|---|---|
0x000 | 2 | Data |
0x002 | 1 | Table Index |
0x003 | 1 | Padding |
Data BlockEdit
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 TableEdit
OFFSET | SIZE | DESCRIPTION |
---|---|---|
0x000 | 4 | Count |
0x004 | Count * 8 | References (Offsets relative to Count field) |
Sized ReferenceEdit
OFFSET | SIZE | DESCRIPTION |
---|---|---|
0x000 | 8 | Reference |
0x008 | 4 | Size |
ReferenceEdit
OFFSET | SIZE | DESCRIPTION |
---|---|---|
0x000 | 2 | Type ID |
0x002 | 2 | Padding |
0x004 | 4 | Offset ("null" = 0xFFFFFFFF) |
Reference TypesEdit
ID | TYPE |
---|---|
0x0300 | DSP ADPCM Info |
0x0301 | IMA ADPCM Info |
0x1F00 | Sample Data |
0x7000 | Info Block |
0x7001 | Data Block |
0x7100 | Channel Info |