엄마 목소리 익히기

# The ear's bands (cwkBellows speaker.DEFAULT_THRESHOLDS); the identify answer
# carries the live ones, and these are the fallback.
MATCH_LINE = 0.45
UNCERTAIN_LINE = 0.25

# A correction is enrolled at once when the clip already scores this against
# the voice it is filed under: the ear leaned that way, Dad's word settles it.
AGREES_WITH_PROFILE = UNCERTAIN_LINE
# Two held clips are one voice when their embeddings agree this well. Dad's
# two-second chunks scored 0.38 against his whole profile at the fifth
# percentile and other voices 0.24 at most (PIPPA-SPEAKER-SEPARATION §7.2);
# a clip against a clip asks for the safe side of both.
CLIPS_AGREE = 0.40
# A clip that sounds this much like another enrolled voice is refused: filing
# it would teach the check a lie.
SOUNDS_LIKE_ANOTHER = MATCH_LINE
# A correction carries at most this much speech; Bellows needs 2 s.
CORRECTION_MAX_SECONDS = 30.0
CORRECTION_MIN_SECONDS = 2.0
# Held clips older than this no longer pair with a new one (they are kept).
HELD_PAIRING_DAYS = 30
# A corrected stretch this long or more is kept even when it is under a
# sample's two seconds: it waits in the short pool (see the module doc).
SHORT_CLIP_SECONDS = 0.6
# Harvest: a stretch the check named for someone other than Dad is a
# candidate when it scored at least HARVEST_LINE against that voice, at most
# HARVEST_DAD_CEILING against Dad, and spoke HARVEST_MIN_SECONDS. Mom's live
# stretches scored 0.52-0.54 in the 2026-10-09 test turns and Dad's
# stretches 0.15-0.23 against her; the match line is 0.45.
HARVEST_LINE = 0.50
HARVEST_DAD_CEILING = 0.25
HARVEST_MIN_SECONDS = 2.0
HARVEST_PER_DAY = 4

# How a correction ("that was Mom") is filed: enroll, hold or refuse.
# correction_decision is cwkPippa's rule; the embeddings below are toys.
import math
from statistics import median

MATCH_LINE = 0.45
AGREES_WITH_PROFILE = 0.25    # the ear already leans this way: Dad's word settles it
SOUNDS_LIKE_ANOTHER = MATCH_LINE
CLIPS_AGREE = 0.40            # two held clips are one voice at this cosine


def correction_decision(profile, scores, enrolled):
    own = scores.get(profile)
    rival = max(((p, s) for p, s in scores.items() if p != profile), key=lambda item: item[1], default=None)
    if rival and rival[1] >= SOUNDS_LIKE_ANOTHER and rival[1] > (own if own is not None else -1.0):
        return "refuse", rival
    if profile not in enrolled or (own is not None and own >= AGREES_WITH_PROFILE):
        return "enroll", None
    return "hold", None


def cosine(a, b):
    dot = sum(x * y for x, y in zip(a, b))
    return dot / (math.sqrt(sum(x * x for x in a)) * math.sqrt(sum(y * y for y in b)))


enrolled = ["dad", "mom"]
cases = {
    "Mom's stretch, filed as Mom": {"dad": 0.18, "mom": 0.48},
    "Dad's stretch, filed as Mom": {"dad": 0.61, "mom": 0.21},
    "a stranger, filed as Mom": {"dad": 0.05, "mom": 0.12},
    "Mom far from the mic, filed as Mom": {"dad": 0.10, "mom": 0.19},
}
for name, scores in cases.items():
    decision, rival = correction_decision("mom", scores, enrolled)
    print(f"{name:<36} -> {decision}{f' (sounds like {rival[0]} {rival[1]:.2f})' if rival else ''}")

# Two held clips go in together only when they agree with each other.
held_stranger = [0.9, 0.1, 0.0, 0.4]
held_far_mom = [0.1, 0.8, 0.5, 0.0]
next_far_mom = [0.2, 0.7, 0.6, 0.1]
for name, clip in {"the held stranger": held_stranger, "the held far-away Mom": held_far_mom}.items():
    score = cosine(clip, next_far_mom)
    print(f"next correction vs {name:<22} cosine {score:.2f} -> {'both enrolled' if score >= CLIPS_AGREE else 'still held'}")

# Voice health: a median under the match line over three or more stretches.
recent = [0.52, 0.41, 0.39, 0.44, 0.47]
m = median(recent)
print(f"Mom's last {len(recent)} stretches: median {m:.2f} -> {'tell Dad, offer a re-enrollment' if m < MATCH_LINE else 'healthy'}")

# Output:
# Mom's stretch, filed as Mom          -> enroll
# Dad's stretch, filed as Mom          -> refuse (sounds like dad 0.61)
# a stranger, filed as Mom             -> hold
# Mom far from the mic, filed as Mom   -> hold
# next correction vs the held stranger      cosine 0.31 -> still held
# next correction vs the held far-away Mom  cosine 0.98 -> both enrolled
# Mom's last 5 stretches: median 0.44 -> tell Dad, offer a re-enrollment