54 lines
2.2 KiB
C#
54 lines
2.2 KiB
C#
namespace Ryujinx.Graphics.Nvdec.Vp9.Dsp
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{
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internal static class TxfmCommon
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{
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// Constants used by all idct/dct functions
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public const int DctConstBits = 14;
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public const int DctConstRounding = 1 << (DctConstBits - 1);
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public const int UnitQuantShift = 2;
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public const int UnitQuantFactor = 1 << UnitQuantShift;
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// Constants:
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// for (int i = 1; i < 32; ++i)
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// Console.WriteLine("public const short CosPi{0}_64 = {1};", i, MathF.Round(16384 * MathF.Cos(i * MathF.PI / 64)));
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// Note: sin(k * Pi / 64) = cos((32 - k) * Pi / 64)
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public const short CosPi164 = 16364;
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public const short CosPi264 = 16305;
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public const short CosPi364 = 16207;
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public const short CosPi464 = 16069;
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public const short CosPi564 = 15893;
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public const short CosPi664 = 15679;
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public const short CosPi764 = 15426;
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public const short CosPi864 = 15137;
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public const short CosPi964 = 14811;
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public const short CosPi1064 = 14449;
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public const short CosPi1164 = 14053;
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public const short CosPi1264 = 13623;
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public const short CosPi1364 = 13160;
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public const short CosPi1464 = 12665;
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public const short CosPi1564 = 12140;
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public const short CosPi1664 = 11585;
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public const short CosPi1764 = 11003;
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public const short CosPi1864 = 10394;
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public const short CosPi1964 = 9760;
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public const short CosPi2064 = 9102;
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public const short CosPi2164 = 8423;
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public const short CosPi2264 = 7723;
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public const short CosPi2364 = 7005;
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public const short CosPi2464 = 6270;
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public const short CosPi2564 = 5520;
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public const short CosPi2664 = 4756;
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public const short CosPi2764 = 3981;
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public const short CosPi2864 = 3196;
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public const short CosPi2964 = 2404;
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public const short CosPi3064 = 1606;
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public const short CosPi3164 = 804;
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// 16384 * sqrt(2) * sin(kPi / 9) * 2 / 3
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public const short SinPi19 = 5283;
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public const short SinPi29 = 9929;
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public const short SinPi39 = 13377;
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public const short SinPi49 = 15212;
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}
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} |