FA-48853 / PCM sample encoding / Member archive

Subbyte code packer: padding modulo · case 03

Already aligned packets receive a whole spurious padding octet.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Pack unsigned codes fitting width 1..7 most-significant bit first after an explicit bit prefix; return octets, significant-bit count and zero tail padding count.

Why this case matters

Offline PCM interchange uses these exact bounded packet and sample representation decisions.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
oracle 3	`[[0], 0, 8]`	`[[], 0, 0]`	Failed

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