facetimehd-calibration: fix build (#438028)

# Described on https://github.com/patjak/facetimehd/wiki/Extracting-the-sensor-calibration-files

#

# The whole download is 518MB; the deflate stream we're interested in is 1.2MB.

urlRoot="https://download.info.apple.com/Mac_OS_X/031-30890-20150812-ea191174-4130-11e5-a125-930911ba098f"

curl --insecure -o bootcamp.zip "$urlRoot/bootcamp$version.zip" -r 2338085-3492508

# Add appropriate headers and footers so that zcat extracts cleanly

{ printf '\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\x00'

  cat bootcamp.zip

  printf '\x51\x1f\x86\x78\xcf\x5b\x12\x00'

} | zcat > AppleCamera64.exe

unrar x AppleCamera64.exe AppleCamera.sys

# These offsets and sizes are from the wiki also

dd bs=1 skip=1663920 count=33060 if=AppleCamera.sys of=9112_01XX.dat

dd bs=1 skip=1644880 count=19040 if=AppleCamera.sys of=1771_01XX.dat

dd bs=1 skip=1606800 count=19040 if=AppleCamera.sys of=1871_01XX.dat

dd bs=1 skip=1625840 count=19040 if=AppleCamera.sys of=1874_01XX.dat

mkdir -p "$out/lib/firmware/facetimehd"

cp -a *.dat "$out/lib/firmware/facetimehd"

{

  lib,

  stdenvNoCC,

  fetchurl,

  curl,

  unrar-wrapper,

  pkgs,

}:

let

  version = "5.1.5769";

  # Described on https://github.com/patjak/facetimehd/wiki/Extracting-the-sensor-calibration-files

  # From the wiki page, range extracted with binwalk:

  zipUrl = "https://download.info.apple.com/Mac_OS_X/031-30890-20150812-ea191174-4130-11e5-a125-930911ba098f/bootcamp${version}.zip";

  zipRange = "2338085-3492508"; # the whole download is 518MB, this deflate stream is 1.2MB

  # CRC and length from the ZIP entry header (not strictly necessary, but makes it extract cleanly):

  gzFooter = ''\x51\x1f\x86\x78\xcf\x5b\x12\x00'';

  # Also from the wiki page:

  calibrationFiles = [

    {

      file = "1771_01XX.dat";

      offset = "1644880";

      size = "19040";

    }

    {

      file = "1871_01XX.dat";

      offset = "1606800";

      size = "19040";

    }

    {

      file = "1874_01XX.dat";

      offset = "1625840";

      size = "19040";

    }

    {

      file = "9112_01XX.dat";

      offset = "1663920";

      size = "33060";

    }

  ];

in

stdenvNoCC.mkDerivation {

  pname = "facetimehd-calibration";

  inherit version;

  src = fetchurl {

    url = zipUrl;

    sha256 = "1dzyv457fp6d8ly29sivqn6llwj5ydygx7p8kzvdnsp11zvid2xi";

    curlOpts = "-r ${zipRange}";

  };

  dontUnpack = true;

  dontInstall = true;

  version = "5.1.5769";

  nativeBuildInputs = [ unrar-wrapper ];

  # This is a special sort of fixed-output derivation

  outputHash = "sha256-KQBIlpa68wjQNgBiEnLtl6iEYseNrTlSdq9wiNni16k=";

  outputHashMode = "recursive";

  buildPhase = ''

    { printf '\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\x00'

      cat $src

      printf '${gzFooter}'

    } | zcat > AppleCamera64.exe

    unrar x AppleCamera64.exe AppleCamera.sys

  __structuredAttrs = true;

  builder = ./builder.sh;

    mkdir -p $out/lib/firmware/facetimehd

  ''

  + lib.concatMapStrings (

    {

      file,

      offset,

      size,

    }:

    ''

      dd bs=1 skip=${offset} count=${size} if=AppleCamera.sys of=$out/lib/firmware/facetimehd/${file}

    ''

  ) calibrationFiles;

  nativeBuildInputs = [

    curl

    unrar-wrapper

  ];

  meta = with lib; {

  meta = {

    description = "facetimehd calibration";

    homepage = "https://support.apple.com/kb/DL1837";

    license = licenses.unfree;

    maintainers = with maintainers; [

    license = lib.licenses.unfree;

    maintainers = with lib.maintainers; [

      alexshpilkin

      womfoo

      grahamc

    ];

    platforms = [

      "i686-linux"

      "x86_64-linux"

    ];

    platforms = lib.platforms.all;

    sourceProvenance = with lib.sourceTypes; [ binaryFirmware ];

  };

}