diff options
Diffstat (limited to 'Ryujinx.Graphics.Nvdec.Vp9/Dsp/TxfmCommon.cs')
| -rw-r--r-- | Ryujinx.Graphics.Nvdec.Vp9/Dsp/TxfmCommon.cs | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Dsp/TxfmCommon.cs b/Ryujinx.Graphics.Nvdec.Vp9/Dsp/TxfmCommon.cs new file mode 100644 index 00000000..e041f2e0 --- /dev/null +++ b/Ryujinx.Graphics.Nvdec.Vp9/Dsp/TxfmCommon.cs @@ -0,0 +1,54 @@ +namespace Ryujinx.Graphics.Nvdec.Vp9.Dsp +{ + internal static class TxfmCommon + { + // Constants used by all idct/dct functions + public const int DctConstBits = 14; + public const int DctConstRounding = 1 << (DctConstBits - 1); + + public const int UnitQuantShift = 2; + public const int UnitQuantFactor = 1 << UnitQuantShift; + + // Constants: + // for (int i = 1; i < 32; ++i) + // Console.WriteLine("public const short CosPi{0}_64 = {1};", i, MathF.Round(16384 * MathF.Cos(i * MathF.PI / 64))); + // Note: sin(k * Pi / 64) = cos((32 - k) * Pi / 64) + public const short CosPi1_64 = 16364; + public const short CosPi2_64 = 16305; + public const short CosPi3_64 = 16207; + public const short CosPi4_64 = 16069; + public const short CosPi5_64 = 15893; + public const short CosPi6_64 = 15679; + public const short CosPi7_64 = 15426; + public const short CosPi8_64 = 15137; + public const short CosPi9_64 = 14811; + public const short CosPi10_64 = 14449; + public const short CosPi11_64 = 14053; + public const short CosPi12_64 = 13623; + public const short CosPi13_64 = 13160; + public const short CosPi14_64 = 12665; + public const short CosPi15_64 = 12140; + public const short CosPi16_64 = 11585; + public const short CosPi17_64 = 11003; + public const short CosPi18_64 = 10394; + public const short CosPi19_64 = 9760; + public const short CosPi20_64 = 9102; + public const short CosPi21_64 = 8423; + public const short CosPi22_64 = 7723; + public const short CosPi23_64 = 7005; + public const short CosPi24_64 = 6270; + public const short CosPi25_64 = 5520; + public const short CosPi26_64 = 4756; + public const short CosPi27_64 = 3981; + public const short CosPi28_64 = 3196; + public const short CosPi29_64 = 2404; + public const short CosPi30_64 = 1606; + public const short CosPi31_64 = 804; + + // 16384 * sqrt(2) * sin(kPi / 9) * 2 / 3 + public const short SinPi1_9 = 5283; + public const short SinPi2_9 = 9929; + public const short SinPi3_9 = 13377; + public const short SinPi4_9 = 15212; + } +} |