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→HEAD chunk
Line 75:
Line 75:
It contains what looks like the ADPCM table and YN1/YN2, twice, probably once for the first part and once for the last (looping) part.<br/>+
−It also contains some other unknown stuff.+
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=== HEAD chunk ===
=== HEAD chunk ===
−The head chunk is typically 256 bytes long.<br/>
+The HEAD chunk contains information about the brstm file, including sample rate, loop information, volume, panning, and information on each of the ADPCM streams.
−This chunk contains 3 internal parts.<br/>
+Part 1 contains general information about the file such as loop information, sample rate, and data needed to deinterleave the audio stream.<br/>
+Part 2 defines the tracks in the file, and contains volume and panning information for each of them.<br/>
+Part 3 contains the information needed to decode the ADPCM audio, including the ADPCM coefficients, and history samples.
+Any internal offsets in the HEAD chunk are based off of byte 8 in the header. e.g. Offset 0x40 would refer to offset 0x48 in the overall header.
+HEAD chunk header
+{| class="wikitable"
+|-
+! Offset
+! Size
+! Description
+|-
+| 0x0000
+| 4
+| "HEAD" (0x48454144)
+|-
+| 0x0004
+| 4
+| Length of entire HEAD section.
+|-
+| 0x0008
+| 4
+| Marker? (0x01000000)
+|-
+| 0x000C
+| 4
+| Offset to HEAD chunk part 1
+|-
+| 0x0010
+| 4
+| Marker? (0x01000000)
+|-
+| 0x0014
+| 4
+| Offset to HEAD chunk part 2
+|-
+| 0x0018
+| 4
+| Marker? (0x01000000)
+|-
+| 0x001C
+| 4
+| Offset to HEAD chunk part 3
+|}
=== ADPC chunk ===
=== ADPC chunk ===