FA-49099 / PCM sample encoding / Member archive

Pcm bitplane restore: sample bit offset · case 04

Samples within each PCM bitplane are read in reverse order.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Restore signed PCM sample integers from least-significant-bit-first bitplanes; sample index selects a bit inside each plane, and extra planes are ignored.

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 1	`[3, -2, -3]`	`[-3, -2, 3]`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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