This document is about the format of CTR Streams (CSTM).
The structure is similar to that of a BCWAV, with a few differences, such as its different INFO block format, the addition of a SEEK block, and the organization of the DATA block samples into blocks.
These files are either found in rom:\sound\stream\ or they can be inside of a CSAR.
| OFFSET |
SIZE |
DESCRIPTION
|
| 0x000 |
4 |
Magic (CSTM)
|
| 0x004 |
2 |
Endianness (0xFEFF = little, 0xFFFE = big)
|
| 0x006 |
2 |
Header Size (0x40 due to Info Block alignment)
|
| 0x008 |
4 |
Version (0x02000000)
|
| 0x00C |
4 |
File Size
|
| 0x010 |
2 |
Number of Blocks (3)
|
| 0x012 |
2 |
Reserved
|
| 0x014 |
12 |
Info Block Sized Reference (Offset relative to start of file)
|
| 0x020 |
12 |
Seek Block Sized Reference (Offset relative to start of file)
|
| 0x02C |
12 |
Data Block Sized Reference (Offset relative to start of file)
|
| OFFSET |
SIZE |
DESCRIPTION
|
| 0x000 |
4 |
Magic
|
| 0x004 |
4 |
Size
|
Block TypesEdit
Info BlockEdit
If encoding is DSP ADPCM:
If encoding is IMA ADPCM:
The info block is aligned to 0x20 bytes.
| VALUE |
DESCRIPTION
|
| 0 |
PCM8
|
| 1 |
PCM16
|
| 2 |
DSP ADPCM
|
| 3 |
IMA ADPCM
|
Stream InfoEdit
| OFFSET |
SIZE |
DESCRIPTION
|
| 0x000 |
1 |
Encoding
|
| 0x001 |
1 |
Loop (0 = don't loop, 1 = loop)
|
| 0x002 |
1 |
Channel Count
|
| 0x003 |
1 |
Padding
|
| 0x004 |
4 |
Sample Rate
|
| 0x008 |
4 |
Loop Start Frame
|
| 0x00C |
4 |
Loop End Frame
|
| 0x010 |
4 |
Sample Block Count
|
| 0x014 |
4 |
Sample Block Size
|
| 0x018 |
4 |
Sample Block Sample Count
|
| 0x01C |
4 |
Last Sample Block Size
|
| 0x020 |
4 |
Last Sample Block Sample Count
|
| 0x024 |
4 |
Last Sample Block Padded Size
|
| 0x028 |
4 |
Seek Data Size
|
| 0x02C |
4 |
Seek Interval Sample Count
|
| 0x030 |
8 |
Sample Data Reference (Offset relative to Data Block Data field)
|
Track InfoEdit
| OFFSET |
SIZE |
DESCRIPTION
|
| 0x000 |
1 |
Volume
|
| 0x001 |
1 |
Pan
|
| 0x002 |
2 |
Padding
|
| 0x004 |
8 |
Channel Index Byte Table Reference (Offset relative to Volume field)
|
| 0x00C |
X |
Channel Index Byte Table (Padded to 4 bytes)
|
Byte TableEdit
| OFFSET |
SIZE |
DESCRIPTION
|
| 0x000 |
4 |
Count
|
| 0x004 |
Count |
Elements
|
Channel InfoEdit
| OFFSET |
SIZE |
DESCRIPTION
|
| 0x000 |
8 |
ADPCM Info Reference (Offset relative to this field)
|
DSP ADPCM InfoEdit
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
IMA ADPCM ContextEdit
| OFFSET |
SIZE |
DESCRIPTION
|
| 0x000 |
2 |
Data
|
| 0x002 |
1 |
Table Index
|
| 0x003 |
1 |
Padding
|
Seek BlockEdit
The seek block is aligned to 0x20 bytes.
Data BlockEdit
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