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path: root/Ryujinx.Graphics/Texture/IntegerEncoded.cs
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Diffstat (limited to 'Ryujinx.Graphics/Texture/IntegerEncoded.cs')
-rw-r--r--Ryujinx.Graphics/Texture/IntegerEncoded.cs269
1 files changed, 0 insertions, 269 deletions
diff --git a/Ryujinx.Graphics/Texture/IntegerEncoded.cs b/Ryujinx.Graphics/Texture/IntegerEncoded.cs
deleted file mode 100644
index 683cb770..00000000
--- a/Ryujinx.Graphics/Texture/IntegerEncoded.cs
+++ /dev/null
@@ -1,269 +0,0 @@
-using System.Collections;
-using System.Collections.Generic;
-
-namespace Ryujinx.Graphics.Texture
-{
- public struct IntegerEncoded
- {
- public enum EIntegerEncoding
- {
- JustBits,
- Quint,
- Trit
- }
-
- EIntegerEncoding Encoding;
- public int NumberBits { get; private set; }
- public int BitValue { get; private set; }
- public int TritValue { get; private set; }
- public int QuintValue { get; private set; }
-
- public IntegerEncoded(EIntegerEncoding _Encoding, int NumBits)
- {
- Encoding = _Encoding;
- NumberBits = NumBits;
- BitValue = 0;
- TritValue = 0;
- QuintValue = 0;
- }
-
- public bool MatchesEncoding(IntegerEncoded Other)
- {
- return Encoding == Other.Encoding && NumberBits == Other.NumberBits;
- }
-
- public EIntegerEncoding GetEncoding()
- {
- return Encoding;
- }
-
- public int GetBitLength(int NumberVals)
- {
- int TotalBits = NumberBits * NumberVals;
- if (Encoding == EIntegerEncoding.Trit)
- {
- TotalBits += (NumberVals * 8 + 4) / 5;
- }
- else if (Encoding == EIntegerEncoding.Quint)
- {
- TotalBits += (NumberVals * 7 + 2) / 3;
- }
- return TotalBits;
- }
-
- public static IntegerEncoded CreateEncoding(int MaxVal)
- {
- while (MaxVal > 0)
- {
- int Check = MaxVal + 1;
-
- // Is maxVal a power of two?
- if ((Check & (Check - 1)) == 0)
- {
- return new IntegerEncoded(EIntegerEncoding.JustBits, BitArrayStream.PopCnt(MaxVal));
- }
-
- // Is maxVal of the type 3*2^n - 1?
- if ((Check % 3 == 0) && ((Check / 3) & ((Check / 3) - 1)) == 0)
- {
- return new IntegerEncoded(EIntegerEncoding.Trit, BitArrayStream.PopCnt(Check / 3 - 1));
- }
-
- // Is maxVal of the type 5*2^n - 1?
- if ((Check % 5 == 0) && ((Check / 5) & ((Check / 5) - 1)) == 0)
- {
- return new IntegerEncoded(EIntegerEncoding.Quint, BitArrayStream.PopCnt(Check / 5 - 1));
- }
-
- // Apparently it can't be represented with a bounded integer sequence...
- // just iterate.
- MaxVal--;
- }
-
- return new IntegerEncoded(EIntegerEncoding.JustBits, 0);
- }
-
- public static void DecodeTritBlock(
- BitArrayStream BitStream,
- List<IntegerEncoded> ListIntegerEncoded,
- int NumberBitsPerValue)
- {
- // Implement the algorithm in section C.2.12
- int[] m = new int[5];
- int[] t = new int[5];
- int T;
-
- // Read the trit encoded block according to
- // table C.2.14
- m[0] = BitStream.ReadBits(NumberBitsPerValue);
- T = BitStream.ReadBits(2);
- m[1] = BitStream.ReadBits(NumberBitsPerValue);
- T |= BitStream.ReadBits(2) << 2;
- m[2] = BitStream.ReadBits(NumberBitsPerValue);
- T |= BitStream.ReadBits(1) << 4;
- m[3] = BitStream.ReadBits(NumberBitsPerValue);
- T |= BitStream.ReadBits(2) << 5;
- m[4] = BitStream.ReadBits(NumberBitsPerValue);
- T |= BitStream.ReadBits(1) << 7;
-
- int C = 0;
-
- BitArrayStream Tb = new BitArrayStream(new BitArray(new int[] { T }));
- if (Tb.ReadBits(2, 4) == 7)
- {
- C = (Tb.ReadBits(5, 7) << 2) | Tb.ReadBits(0, 1);
- t[4] = t[3] = 2;
- }
- else
- {
- C = Tb.ReadBits(0, 4);
- if (Tb.ReadBits(5, 6) == 3)
- {
- t[4] = 2;
- t[3] = Tb.ReadBit(7);
- }
- else
- {
- t[4] = Tb.ReadBit(7);
- t[3] = Tb.ReadBits(5, 6);
- }
- }
-
- BitArrayStream Cb = new BitArrayStream(new BitArray(new int[] { C }));
- if (Cb.ReadBits(0, 1) == 3)
- {
- t[2] = 2;
- t[1] = Cb.ReadBit(4);
- t[0] = (Cb.ReadBit(3) << 1) | (Cb.ReadBit(2) & ~Cb.ReadBit(3));
- }
- else if (Cb.ReadBits(2, 3) == 3)
- {
- t[2] = 2;
- t[1] = 2;
- t[0] = Cb.ReadBits(0, 1);
- }
- else
- {
- t[2] = Cb.ReadBit(4);
- t[1] = Cb.ReadBits(2, 3);
- t[0] = (Cb.ReadBit(1) << 1) | (Cb.ReadBit(0) & ~Cb.ReadBit(1));
- }
-
- for (int i = 0; i < 5; i++)
- {
- IntegerEncoded IntEncoded = new IntegerEncoded(EIntegerEncoding.Trit, NumberBitsPerValue)
- {
- BitValue = m[i],
- TritValue = t[i]
- };
- ListIntegerEncoded.Add(IntEncoded);
- }
- }
-
- public static void DecodeQuintBlock(
- BitArrayStream BitStream,
- List<IntegerEncoded> ListIntegerEncoded,
- int NumberBitsPerValue)
- {
- // Implement the algorithm in section C.2.12
- int[] m = new int[3];
- int[] q = new int[3];
- int Q;
-
- // Read the trit encoded block according to
- // table C.2.15
- m[0] = BitStream.ReadBits(NumberBitsPerValue);
- Q = BitStream.ReadBits(3);
- m[1] = BitStream.ReadBits(NumberBitsPerValue);
- Q |= BitStream.ReadBits(2) << 3;
- m[2] = BitStream.ReadBits(NumberBitsPerValue);
- Q |= BitStream.ReadBits(2) << 5;
-
- BitArrayStream Qb = new BitArrayStream(new BitArray(new int[] { Q }));
- if (Qb.ReadBits(1, 2) == 3 && Qb.ReadBits(5, 6) == 0)
- {
- q[0] = q[1] = 4;
- q[2] = (Qb.ReadBit(0) << 2) | ((Qb.ReadBit(4) & ~Qb.ReadBit(0)) << 1) | (Qb.ReadBit(3) & ~Qb.ReadBit(0));
- }
- else
- {
- int C = 0;
- if (Qb.ReadBits(1, 2) == 3)
- {
- q[2] = 4;
- C = (Qb.ReadBits(3, 4) << 3) | ((~Qb.ReadBits(5, 6) & 3) << 1) | Qb.ReadBit(0);
- }
- else
- {
- q[2] = Qb.ReadBits(5, 6);
- C = Qb.ReadBits(0, 4);
- }
-
- BitArrayStream Cb = new BitArrayStream(new BitArray(new int[] { C }));
- if (Cb.ReadBits(0, 2) == 5)
- {
- q[1] = 4;
- q[0] = Cb.ReadBits(3, 4);
- }
- else
- {
- q[1] = Cb.ReadBits(3, 4);
- q[0] = Cb.ReadBits(0, 2);
- }
- }
-
- for (int i = 0; i < 3; i++)
- {
- IntegerEncoded IntEncoded = new IntegerEncoded(EIntegerEncoding.Quint, NumberBitsPerValue)
- {
- BitValue = m[i],
- QuintValue = q[i]
- };
- ListIntegerEncoded.Add(IntEncoded);
- }
- }
-
- public static void DecodeIntegerSequence(
- List<IntegerEncoded> DecodeIntegerSequence,
- BitArrayStream BitStream,
- int MaxRange,
- int NumberValues)
- {
- // Determine encoding parameters
- IntegerEncoded IntEncoded = CreateEncoding(MaxRange);
-
- // Start decoding
- int NumberValuesDecoded = 0;
- while (NumberValuesDecoded < NumberValues)
- {
- switch (IntEncoded.GetEncoding())
- {
- case EIntegerEncoding.Quint:
- {
- DecodeQuintBlock(BitStream, DecodeIntegerSequence, IntEncoded.NumberBits);
- NumberValuesDecoded += 3;
-
- break;
- }
-
- case EIntegerEncoding.Trit:
- {
- DecodeTritBlock(BitStream, DecodeIntegerSequence, IntEncoded.NumberBits);
- NumberValuesDecoded += 5;
-
- break;
- }
-
- case EIntegerEncoding.JustBits:
- {
- IntEncoded.BitValue = BitStream.ReadBits(IntEncoded.NumberBits);
- DecodeIntegerSequence.Add(IntEncoded);
- NumberValuesDecoded++;
-
- break;
- }
- }
- }
- }
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2026-01-07 05:01:18 +0000