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55 lines
2.2 KiB
C#
55 lines
2.2 KiB
C#
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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 CosPi1_64 = 16364;
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public const short CosPi2_64 = 16305;
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public const short CosPi3_64 = 16207;
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public const short CosPi4_64 = 16069;
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public const short CosPi5_64 = 15893;
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public const short CosPi6_64 = 15679;
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public const short CosPi7_64 = 15426;
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public const short CosPi8_64 = 15137;
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public const short CosPi9_64 = 14811;
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public const short CosPi10_64 = 14449;
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public const short CosPi11_64 = 14053;
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public const short CosPi12_64 = 13623;
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public const short CosPi13_64 = 13160;
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public const short CosPi14_64 = 12665;
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public const short CosPi15_64 = 12140;
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public const short CosPi16_64 = 11585;
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public const short CosPi17_64 = 11003;
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public const short CosPi18_64 = 10394;
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public const short CosPi19_64 = 9760;
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public const short CosPi20_64 = 9102;
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public const short CosPi21_64 = 8423;
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public const short CosPi22_64 = 7723;
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public const short CosPi23_64 = 7005;
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public const short CosPi24_64 = 6270;
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public const short CosPi25_64 = 5520;
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public const short CosPi26_64 = 4756;
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public const short CosPi27_64 = 3981;
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public const short CosPi28_64 = 3196;
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public const short CosPi29_64 = 2404;
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public const short CosPi30_64 = 1606;
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public const short CosPi31_64 = 804;
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// 16384 * sqrt(2) * sin(kPi / 9) * 2 / 3
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public const short SinPi1_9 = 5283;
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public const short SinPi2_9 = 9929;
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public const short SinPi3_9 = 13377;
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public const short SinPi4_9 = 15212;
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}
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}
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