# libcamera softISP tuning for the Fairphone 6 main camera (Sony IMX896).
#
# CCMs extracted from the FP6 stock Android tuning blob
# com.qti.tuned.fp6_tsp_imx896.bin (vendor_a.img, sha256 0500766f...c1a5d29f),
# CamX cc13_ope_v2 module, tree root at 0x2709fe: 3 lux zones, 3-5 CCT
# regions each, offsets all zero, rows sum to 1.0. This file carries the
# BRIGHT zone (lux-index trigger 1-200) — the true-color tuning, same
# convention as the sibling ov13b10.yaml. Note the bright zone has only
# three CT nodes and merges D50/D65 into one 4800-6700 K region (node
# placed at its 5750 K midpoint); the lowlight zone has proper 5000/6500 K
# nodes but at reduced saturation (chroma-noise hiding) — see
# chromatix/imx896-ccm-awb-extracted.txt for all 12 matrices.
# CT nodes = the chromatix CCT trigger midpoints: 2800 (A), 4000 (TL84),
# 5750 (merged D50/D65 region).
#
# blackLevel: measured on the FP6 2026-08-17 (raw RDI dark frames, phone
# face-down, min analogue gain): 10-bit pedestal 64.0 exact (mean 63.98,
# median 64, p1/p99 63/65) -> 4096 on the 16-bit scale. The softISP's
# dynamic estimate ran at 48, leaving a 16-code residual the CCM amplified
# into colour casts in dark regions.
#
# Awb whitePoints: the 10-point per-illuminant AWB calibration from the
# same blob (white points @0x1c69ed, gain triplets @0x1c2dba — exact
# reciprocals of each other, cross-validated to float precision). The
# locus below carries the 7 on-locus points as (R gain, B gain), warm to
# cool. The 3 fluorescent points (idx 4-6) are deliberately NOT locus
# nodes: they sit ~0.33 gain units off the A-D50 chord (green side) and
# would zigzag the locus; clampMargin 0.35 admits them instead. CT
# labels: 5000 K is PROVEN (the blob's default gain + CCT anchor at
# index 3); 2856 K (illuminant A) is locked by two independent checks —
# sensor-typical A ratios AND the fluorescent trio projecting onto the
# 2856-5000 chord at ~3960 K, i.e. exactly TL84; the remaining labels
# are geometry-derived approximations (the blob stores no CCT list).
# Same ct scale as the ccms table below. damping = per-stats-frame EMA
# (stats run every 4th frame), ~1 s settling at 30 fps.
#
# PROVENANCE / LICENSE: the matrices are numeric calibration data read out
# of the proprietary vendor blob (measured spectral response of this
# sensor, not authored expression). Shipping decided 2026-08-17 by the
# project owner, consistent with existing practice in this image; NOT
# marked CC0. Durable replacement: measure our own matrices from a colour
# chart with libcamera's tuning tooling.
%YAML 1.1
---
version: 1
algorithms:
  - BlackLevel:
      blackLevel: 4096
  - Awb:
      whitePoints:
        - { ct: 1900, gains: [ 0.878997, 4.771635 ] }
        - { ct: 2300, gains: [ 1.119141, 3.340533 ] }
        - { ct: 2856, gains: [ 1.377957, 2.769483 ] }
        - { ct: 5000, gains: [ 2.037341, 1.809127 ] }
        - { ct: 6504, gains: [ 2.367133, 1.574040 ] }
        - { ct: 7504, gains: [ 2.741927, 1.357219 ] }
        - { ct: 9500, gains: [ 4.508486, 1.012164 ] }
      clampMargin: 0.35
      damping: 0.8
  - Ccm:
      ccms:
        - ct: 2800
          ccm: [ 1.593410, -0.552769, -0.040641,
                -0.166429,  1.170414, -0.003985,
                 0.004114, -0.855526,  1.851411 ]
        - ct: 4000
          ccm: [ 1.612519, -0.785270,  0.172751,
                -0.110672,  1.189965, -0.079293,
                 0.091939, -0.965137,  1.873197 ]
        - ct: 5750
          ccm: [ 1.900000, -0.581250, -0.318750,
                -0.292500,  1.778126, -0.485626,
                 0.014573, -0.734843,  1.720270 ]
  - Adjust:
  - Agc:
  - Af:
...