FA-81832 / MIDI event timing / Member archive

Event placement inside an audio render buffer: first sample of the next buffer rendered now · case 02

An event exactly at start+size is given offset size, one past the end of the current buffer.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Input [sample_rate, buffer_start_sample, buffer_size, event_times_us]. Each event maps to sample position us*rate/1000000 rounded half up. Positions before the buffer start are "late", positions at or after start+size are "future", otherwise the offset within the buffer. Invalid rate or size returns None.

Why this case matters

MIDI sequencers, file readers and synth drivers depend on exact event ordering and tick/time arithmetic.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
oracle 0	`[0, 0, 256, 256]`	`[0, 0, "future", "future"]`	Failed

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

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