CSMP (File Format)
The .CSMP file format is an audio format seen in Retro Studios games starting in Metroid Prime 3. It's very similar in use to AGSC and usually contains sound affects. Where CSMP differs is the fact that it only contains one sound and is broken up into obvious data chunks with easily identifiable sizes.
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To do: Notate Tropical freeze differences (Paraxade do you know anything?) |
Header
This is the header structure found in Metroid Prime 3 and Donkey Kong Country Returns; Tropical Freeze's seems to be a bit different. The file can be read using a simple while loop; each chunk sets its own size.
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To do: We've had success getting audio out of Tropical Freeze, crediar mentioned ddspadpcm being used in Tropical Freeze. What is it? And can we find any information on it? |
| Offset | Size | Description |
|---|---|---|
| 0x0 | 4 | "CSMP" magic fourCC |
| 0x4 | 4 | Version; always 1 |
Chunk
| Offset | Size | Description |
|---|---|---|
| 0x0 | 4 | Chunk type |
| 0x4 | 4 | Chunk size (N) |
| 0x8+N | End of chunk (usually, subtract 4 when the chunk type is equal to 0x44415441 ["DATA"]) | |
Chunk Types
The structure for each chunk are as follows:
NAME
This chunk just has a null-terminated string; it's the name of the contained sound data.
INFO
| Offset | Size | Description |
|---|---|---|
| 0x0 | 1 | Unknown |
| 0x1 | 1 | Loop Flag |
| 0x2 | 4 | Unknown |
| 0x6 | 2 | Unknown |
| 0x8 | 4 | Volume |
PAD
Padding; just skip this chunk using its size value.
DATA
Refer to the DSP page for details.