Generalized Crc32 implementation so it can be used for LG (TLL), Panasonic (.bin and .db) and Sony (sdb.xml)

2026-02-06 22:49:03 +01:00 · 2019-07-20 02:08:51 +02:00
parent 8e6d32e557
commit 1e26ef9cd4
4 changed files with 68 additions and 320 deletions
--- a/source/ChanSort.Loader.Panasonic/Serializer.cs
+++ b/source/ChanSort.Loader.Panasonic/Serializer.cs
@@ -12,7 +12,6 @@ namespace ChanSort.Loader.Panasonic
  class Serializer : SerializerBase
  {
    private const string ERR_FileFormatOrEncryption = "File uses an unknown format or encryption";
-    private static readonly int[] headerCypherTable;
    private readonly ChannelList avbtChannels = new ChannelList(SignalSource.AnalogT | SignalSource.Tv | SignalSource.Radio, "Analog Antenna");
    private readonly ChannelList avbcChannels = new ChannelList(SignalSource.AnalogC | SignalSource.Tv | SignalSource.Radio, "Analog Cable");
    private readonly ChannelList dvbtChannels = new ChannelList(SignalSource.DvbT | SignalSource.Tv | SignalSource.Radio, "DVB-T");
@@ -36,272 +35,6 @@ namespace ChanSort.Loader.Panasonic
      Unknown
    }

-
-    #region static ctor / headerCypherTable
-    static Serializer()
-    {
-      headerCypherTable = new[]
-        {
-          0,
-          79764919,
-          159529838,
-          222504665,
-          319059676,
-          398814059,
-          445009330,
-          507990021,
-          638119352,
-          583659535,
-          797628118,
-          726387553,
-          890018660,
-          835552979,
-          1015980042,
-          944750013,
-          1276238704,
-          1221641927,
-          1167319070,
-          1095957929,
-          1595256236,
-          1540665371,
-          1452775106,
-          1381403509,
-          1780037320,
-          1859660671,
-          1671105958,
-          1733955601,
-          2031960084,
-          2111593891,
-          1889500026,
-          1952343757,
-          -1742489888,
-          -1662866601,
-          -1851683442,
-          -1788833735,
-          -1960329156,
-          -1880695413,
-          -2103051438,
-          -2040207643,
-          -1104454824,
-          -1159051537,
-          -1213636554,
-          -1284997759,
-          -1389417084,
-          -1444007885,
-          -1532160278,
-          -1603531939,
-          -734892656,
-          -789352409,
-          -575645954,
-          -646886583,
-          -952755380,
-          -1007220997,
-          -827056094,
-          -898286187,
-          -231047128,
-          -151282273,
-          -71779514,
-          -8804623,
-          -515967244,
-          -436212925,
-          -390279782,
-          -327299027,
-          881225847,
-          809987520,
-          1023691545,
-          969234094,
-          662832811,
-          591600412,
-          771767749,
-          717299826,
-          311336399,
-          374308984,
-          453813921,
-          533576470,
-          25881363,
-          88864420,
-          134795389,
-          214552010,
-          2023205639,
-          2086057648,
-          1897238633,
-          1976864222,
-          1804852699,
-          1867694188,
-          1645340341,
-          1724971778,
-          1587496639,
-          1516133128,
-          1461550545,
-          1406951526,
-          1302016099,
-          1230646740,
-          1142491917,
-          1087903418,
-          -1398421865,
-          -1469785312,
-          -1524105735,
-          -1578704818,
-          -1079922613,
-          -1151291908,
-          -1239184603,
-          -1293773166,
-          -1968362705,
-          -1905510760,
-          -2094067647,
-          -2014441994,
-          -1716953613,
-          -1654112188,
-          -1876203875,
-          -1796572374,
-          -525066777,
-          -462094256,
-          -382327159,
-          -302564546,
-          -206542021,
-          -143559028,
-          -97365931,
-          -17609246,
-          -960696225,
-          -1031934488,
-          -817968335,
-          -872425850,
-          -709327229,
-          -780559564,
-          -600130067,
-          -654598054,
-          1762451694,
-          1842216281,
-          1619975040,
-          1682949687,
-          2047383090,
-          2127137669,
-          1938468188,
-          2001449195,
-          1325665622,
-          1271206113,
-          1183200824,
-          1111960463,
-          1543535498,
-          1489069629,
-          1434599652,
-          1363369299,
-          622672798,
-          568075817,
-          748617968,
-          677256519,
-          907627842,
-          853037301,
-          1067152940,
-          995781531,
-          51762726,
-          131386257,
-          177728840,
-          240578815,
-          269590778,
-          349224269,
-          429104020,
-          491947555,
-          -248556018,
-          -168932423,
-          -122852000,
-          -60002089,
-          -500490030,
-          -420856475,
-          -341238852,
-          -278395381,
-          -685261898,
-          -739858943,
-          -559578920,
-          -630940305,
-          -1004286614,
-          -1058877219,
-          -845023740,
-          -916395085,
-          -1119974018,
-          -1174433591,
-          -1262701040,
-          -1333941337,
-          -1371866206,
-          -1426332139,
-          -1481064244,
-          -1552294533,
-          -1690935098,
-          -1611170447,
-          -1833673816,
-          -1770699233,
-          -2009983462,
-          -1930228819,
-          -2119160460,
-          -2056179517,
-          1569362073,
-          1498123566,
-          1409854455,
-          1355396672,
-          1317987909,
-          1246755826,
-          1192025387,
-          1137557660,
-          2072149281,
-          2135122070,
-          1912620623,
-          1992383480,
-          1753615357,
-          1816598090,
-          1627664531,
-          1707420964,
-          295390185,
-          358241886,
-          404320391,
-          483945776,
-          43990325,
-          106832002,
-          186451547,
-          266083308,
-          932423249,
-          861060070,
-          1041341759,
-          986742920,
-          613929101,
-          542559546,
-          756411363,
-          701822548,
-          -978770311,
-          -1050133554,
-          -869589737,
-          -924188512,
-          -693284699,
-          -764654318,
-          -550540341,
-          -605129092,
-          -475935807,
-          -413084042,
-          -366743377,
-          -287118056,
-          -257573603,
-          -194731862,
-          -114850189,
-          -35218492,
-          -1984365303,
-          -1921392450,
-          -2143631769,
-          -2063868976,
-          -1698919467,
-          -1635936670,
-          -1824608069,
-          -1744851700,
-          -1347415887,
-          -1418654458,
-          -1506661409,
-          -1561119128,
-          -1129027987,
-          -1200260134,
-          -1254728445,
-          -1309196108
-        };
-    }
-    #endregion
-
    #region ctor()
    public Serializer(string inputFile) : base(inputFile)
    {
@@ -461,16 +194,12 @@ namespace ChanSort.Loader.Panasonic
    #endregion

    #region CalcChecksum()
+
    private uint CalcChecksum(byte[] data, int length)
    {
-      uint v = 0xffffffff;
-      for (int i = 0; i < length; i++)
-      {
-        byte b = data[i];
-        v = (v << 8) ^ (uint)headerCypherTable[((v >> 24) ^ b) & 0xFF];
-      }
-      return v;
+      return Crc32.Normal.CalcCrc32(data, 0, length);
    }
+
    #endregion

    #region CleanTempFile()