New NVDEC and VIC implementation (#1384)

* Initial NVDEC and VIC implementation

* Update FFmpeg.AutoGen to 4.3.0

* Add nvdec dependencies for Windows

* Unify some VP9 structures

* Rename VP9 structure fields

* Improvements to Video API

* XML docs for Common.Memory

* Remove now unused or redundant overloads from MemoryAccessor

* NVDEC UV surface read/write scalar paths

* Add FIXME comments about hacky things/stuff that will need to be fixed in the future

* Cleaned up VP9 memory allocation

* Remove some debug logs

* Rename some VP9 structs

* Remove unused struct

* No need to compile Ryujinx.Graphics.Host1x with unsafe anymore

* Name AsyncWorkQueue threads to make debugging easier

* Make Vp9PictureInfo a ref struct

* LayoutConverter no longer needs the depth argument (broken by rebase)

* Pooling of VP9 buffers, plus fix a memory leak on VP9

* Really wish VS could rename projects properly...

* Address feedback

* Remove using

* Catch OperationCanceledException

* Add licensing informations

* Add THIRDPARTY.md to release too

Co-authored-by: Thog <me@thog.eu>

32 files changed, 1777 insertions, 0 deletions

diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/BModeInfo.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/BModeInfo.cs
new file mode 100644
index 00000000..9e1cd8b4
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/BModeInfo.cs
@@ -0,0 +1,10 @@
+using Ryujinx.Common.Memory;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct BModeInfo
+    {
+        public PredictionMode Mode;
+        public Array2<Mv> Mv;  // First, second inter predictor motion vectors
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/BlockSize.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/BlockSize.cs
new file mode 100644
index 00000000..22a48e20
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/BlockSize.cs
@@ -0,0 +1,21 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal enum BlockSize
+    {
+        Block4x4 = 0,
+        Block4x8 = 1,
+        Block8x4 = 2,
+        Block8x8 = 3,
+        Block8x16 = 4,
+        Block16x8 = 5,
+        Block16x16 = 6,
+        Block16x32 = 7,
+        Block32x16 = 8,
+        Block32x32 = 9,
+        Block32x64 = 10,
+        Block64x32 = 11,
+        Block64x64 = 12,
+        BlockSizes = 13,
+        BlockInvalid = BlockSizes
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/Buf2D.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/Buf2D.cs
new file mode 100644
index 00000000..180d5e34
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/Buf2D.cs
@@ -0,0 +1,10 @@
+using Ryujinx.Common.Memory;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct Buf2D
+    {
+        public ArrayPtr<byte> Buf;
+        public int Stride;
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/FrameType.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/FrameType.cs
new file mode 100644
index 00000000..a783999e
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/FrameType.cs
@@ -0,0 +1,8 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal enum FrameType
+    {
+        KeyFrame = 0,
+        InterFrame = 1
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/LoopFilter.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/LoopFilter.cs
new file mode 100644
index 00000000..8dc33bda
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/LoopFilter.cs
@@ -0,0 +1,27 @@
+using Ryujinx.Common.Memory;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct LoopFilter
+    {
+        public int FilterLevel;
+        public int LastFiltLevel;
+
+        public int SharpnessLevel;
+        public int LastSharpnessLevel;
+
+        public bool ModeRefDeltaEnabled;
+        public bool ModeRefDeltaUpdate;
+
+        // 0 = Intra, Last, GF, ARF
+        public Array4<sbyte> RefDeltas;
+        public Array4<sbyte> LastRefDeltas;
+
+        // 0 = ZERO_MV, MV
+        public Array2<sbyte> ModeDeltas;
+        public Array2<sbyte> LastModeDeltas;
+
+        public ArrayPtr<LoopFilterMask> Lfm;
+        public int LfmStride;
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/LoopFilterInfoN.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/LoopFilterInfoN.cs
new file mode 100644
index 00000000..0ac38a7b
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/LoopFilterInfoN.cs
@@ -0,0 +1,10 @@
+using Ryujinx.Common.Memory;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct LoopFilterInfoN
+    {
+        public Array64<LoopFilterThresh> Lfthr;
+        public Array8<Array4<Array2<byte>>> Lvl;
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/LoopFilterMask.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/LoopFilterMask.cs
new file mode 100644
index 00000000..4aff843a
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/LoopFilterMask.cs
@@ -0,0 +1,24 @@
+using Ryujinx.Common.Memory;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    // This structure holds bit masks for all 8x8 blocks in a 64x64 region.
+    // Each 1 bit represents a position in which we want to apply the loop filter.
+    // Left_ entries refer to whether we apply a filter on the border to the
+    // left of the block.   Above_ entries refer to whether or not to apply a
+    // filter on the above border.   Int_ entries refer to whether or not to
+    // apply borders on the 4x4 edges within the 8x8 block that each bit
+    // represents.
+    // Since each transform is accompanied by a potentially different type of
+    // loop filter there is a different entry in the array for each transform size.
+    internal struct LoopFilterMask
+    {
+        public Array4<ulong> LeftY;
+        public Array4<ulong> AboveY;
+        public ulong Int4x4Y;
+        public Array4<ushort> LeftUv;
+        public Array4<ushort> AboveUv;
+        public ushort Int4x4Uv;
+        public Array64<byte> LflY;
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/LoopFilterThresh.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/LoopFilterThresh.cs
new file mode 100644
index 00000000..bea1d115
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/LoopFilterThresh.cs
@@ -0,0 +1,13 @@
+using Ryujinx.Common.Memory;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    // Need to align this structure so when it is declared and
+    // passed it can be loaded into vector registers.
+    internal struct LoopFilterThresh
+    {
+        public Array16<byte> Mblim;
+        public Array16<byte> Lim;
+        public Array16<byte> HevThr;
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/MacroBlockD.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/MacroBlockD.cs
new file mode 100644
index 00000000..f1111528
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/MacroBlockD.cs
@@ -0,0 +1,179 @@
+using Ryujinx.Common.Memory;
+using Ryujinx.Graphics.Video;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct MacroBlockD
+    {
+        public Array3<MacroBlockDPlane> Plane;
+        public byte BmodeBlocksWl;
+        public byte BmodeBlocksHl;
+
+        public Ptr<Vp9BackwardUpdates> Counts;
+        public TileInfo Tile;
+
+        public int MiStride;
+
+        // Grid of 8x8 cells is placed over the block.
+        // If some of them belong to the same mbtree-block
+        // they will just have same mi[i][j] value
+        public ArrayPtr<Ptr<ModeInfo>> Mi;
+        public Ptr<ModeInfo> LeftMi;
+        public Ptr<ModeInfo> AboveMi;
+
+        public uint MaxBlocksWide;
+        public uint MaxBlocksHigh;
+
+        public ArrayPtr<Array3<byte>> PartitionProbs;
+
+        /* Distance of MB away from frame edges */
+        public int MbToLeftEdge;
+        public int MbToRightEdge;
+        public int MbToTopEdge;
+        public int MbToBottomEdge;
+
+        public Ptr<Vp9EntropyProbs> Fc;
+
+        /* pointers to reference frames */
+        public Array2<Ptr<RefBuffer>> BlockRefs;
+
+        /* pointer to current frame */
+        public Surface CurBuf;
+
+        public Array3<ArrayPtr<sbyte>> AboveContext;
+        public Array3<Array16<sbyte>> LeftContext;
+
+        public ArrayPtr<sbyte> AboveSegContext;
+        public Array8<sbyte> LeftSegContext;
+
+        /* Bit depth: 8, 10, 12 */
+        public int Bd;
+
+        public bool Lossless;
+        public bool Corrupted;
+
+        public Ptr<InternalErrorInfo> ErrorInfo;
+
+        public int GetPredContextSegId()
+        {
+            sbyte aboveSip = !AboveMi.IsNull ? AboveMi.Value.SegIdPredicted : (sbyte)0;
+            sbyte leftSip = !LeftMi.IsNull ? LeftMi.Value.SegIdPredicted : (sbyte)0;
+
+            return aboveSip + leftSip;
+        }
+
+        public int GetSkipContext()
+        {
+            int aboveSkip = !AboveMi.IsNull ? AboveMi.Value.Skip : 0;
+            int leftSkip = !LeftMi.IsNull ? LeftMi.Value.Skip : 0;
+            return aboveSkip + leftSkip;
+        }
+
+        public int GetPredContextSwitchableInterp()
+        {
+            // Note:
+            // The mode info data structure has a one element border above and to the
+            // left of the entries corresponding to real macroblocks.
+            // The prediction flags in these dummy entries are initialized to 0.
+            int leftType = !LeftMi.IsNull ? LeftMi.Value.InterpFilter : Constants.SwitchableFilters;
+            int aboveType = !AboveMi.IsNull ? AboveMi.Value.InterpFilter : Constants.SwitchableFilters;
+
+            if (leftType == aboveType)
+            {
+                return leftType;
+            }
+            else if (leftType == Constants.SwitchableFilters)
+            {
+                return aboveType;
+            }
+            else if (aboveType == Constants.SwitchableFilters)
+            {
+                return leftType;
+            }
+            else
+            {
+                return Constants.SwitchableFilters;
+            }
+        }
+
+        // The mode info data structure has a one element border above and to the
+        // left of the entries corresponding to real macroblocks.
+        // The prediction flags in these dummy entries are initialized to 0.
+        // 0 - inter/inter, inter/--, --/inter, --/--
+        // 1 - intra/inter, inter/intra
+        // 2 - intra/--, --/intra
+        // 3 - intra/intra
+        public int GetIntraInterContext()
+        {
+            if (!AboveMi.IsNull && !LeftMi.IsNull)
+            {  // Both edges available
+                bool aboveIntra = !AboveMi.Value.IsInterBlock();
+                bool leftIntra = !LeftMi.Value.IsInterBlock();
+                return leftIntra && aboveIntra ? 3 : (leftIntra || aboveIntra ? 1 : 0);
+            }
+            else if (!AboveMi.IsNull || !LeftMi.IsNull)
+            {  // One edge available
+                return 2 * (!(!AboveMi.IsNull ? AboveMi.Value : LeftMi.Value).IsInterBlock() ? 1 : 0);
+            }
+            return 0;
+        }
+
+        // Returns a context number for the given MB prediction signal
+        // The mode info data structure has a one element border above and to the
+        // left of the entries corresponding to real blocks.
+        // The prediction flags in these dummy entries are initialized to 0.
+        public int GetTxSizeContext()
+        {
+            int maxTxSize = (int)Luts.MaxTxSizeLookup[(int)Mi[0].Value.SbType];
+            int aboveCtx = (!AboveMi.IsNull && AboveMi.Value.Skip == 0) ? (int)AboveMi.Value.TxSize : maxTxSize;
+            int leftCtx = (!LeftMi.IsNull && LeftMi.Value.Skip == 0) ? (int)LeftMi.Value.TxSize : maxTxSize;
+            if (LeftMi.IsNull)
+            {
+                leftCtx = aboveCtx;
+            }
+
+            if (AboveMi.IsNull)
+            {
+                aboveCtx = leftCtx;
+            }
+
+            return (aboveCtx + leftCtx) > maxTxSize ? 1 : 0;
+        }
+
+        public void SetupBlockPlanes(int ssX, int ssY)
+        {
+            int i;
+
+            for (i = 0; i < Constants.MaxMbPlane; i++)
+            {
+                Plane[i].SubsamplingX = i != 0 ? ssX : 0;
+                Plane[i].SubsamplingY = i != 0 ? ssY : 0;
+            }
+        }
+
+        public void SetSkipContext(int miRow, int miCol)
+        {
+            int aboveIdx = miCol * 2;
+            int leftIdx = (miRow * 2) & 15;
+            int i;
+            for (i = 0; i < Constants.MaxMbPlane; ++i)
+            {
+                ref MacroBlockDPlane pd = ref Plane[i];
+                pd.AboveContext = AboveContext[i].Slice(aboveIdx >> pd.SubsamplingX);
+                pd.LeftContext = new ArrayPtr<sbyte>(ref LeftContext[i][leftIdx >> pd.SubsamplingY], 16 - (leftIdx >> pd.SubsamplingY));
+            }
+        }
+
+        internal void SetMiRowCol(ref TileInfo tile, int miRow, int bh, int miCol, int bw, int miRows, int miCols)
+        {
+            MbToTopEdge = -((miRow * Constants.MiSize) * 8);
+            MbToBottomEdge = ((miRows - bh - miRow) * Constants.MiSize) * 8;
+            MbToLeftEdge = -((miCol * Constants.MiSize) * 8);
+            MbToRightEdge = ((miCols - bw - miCol) * Constants.MiSize) * 8;
+
+            // Are edges available for intra prediction?
+            AboveMi = (miRow != 0) ? Mi[-MiStride] : Ptr<ModeInfo>.Null;
+            LeftMi = (miCol > tile.MiColStart) ? Mi[-1] : Ptr<ModeInfo>.Null;
+        }
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/MacroBlockDPlane.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/MacroBlockDPlane.cs
new file mode 100644
index 00000000..ae4ec6f4
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/MacroBlockDPlane.cs
@@ -0,0 +1,21 @@
+using Ryujinx.Common.Memory;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct MacroBlockDPlane
+    {
+        public ArrayPtr<int> DqCoeff;
+        public int SubsamplingX;
+        public int SubsamplingY;
+        public Buf2D Dst;
+        public Array2<Buf2D> Pre;
+        public ArrayPtr<sbyte> AboveContext;
+        public ArrayPtr<sbyte> LeftContext;
+        public Array8<Array2<short>> SegDequant;
+
+        // Number of 4x4s in current block
+        public ushort N4W, N4H;
+        // Log2 of N4W, N4H
+        public byte N4Wl, N4Hl;
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/ModeInfo.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/ModeInfo.cs
new file mode 100644
index 00000000..8ef281d8
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/ModeInfo.cs
@@ -0,0 +1,66 @@
+using Ryujinx.Common.Memory;
+using System.Diagnostics;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct ModeInfo
+    {
+        // Common for both Inter and Intra blocks
+        public BlockSize SbType;
+        public PredictionMode Mode;
+        public TxSize TxSize;
+        public sbyte Skip;
+        public sbyte SegmentId;
+        public sbyte SegIdPredicted;  // Valid only when TemporalUpdate is enabled
+
+        // Only for Intra blocks
+        public PredictionMode UvMode;
+
+        // Only for Inter blocks
+        public byte InterpFilter;
+
+        // if ref_frame[idx] is equal to AltRefFrame then
+        // MacroBlockD.BlockRef[idx] is an altref
+        public Array2<sbyte> RefFrame;
+
+        public Array2<Mv> Mv;
+
+        public Array4<BModeInfo> Bmi;
+
+        public PredictionMode GetYMode(int block)
+        {
+            return SbType < BlockSize.Block8x8 ? Bmi[block].Mode : Mode;
+        }
+
+        public TxSize GetUvTxSize(ref MacroBlockDPlane pd)
+        {
+            Debug.Assert(SbType < BlockSize.Block8x8 ||
+                Luts.SsSizeLookup[(int)SbType][pd.SubsamplingX][pd.SubsamplingY] != BlockSize.BlockInvalid);
+            return Luts.UvTxsizeLookup[(int)SbType][(int)TxSize][pd.SubsamplingX][pd.SubsamplingY];
+        }
+
+        public bool IsInterBlock()
+        {
+            return RefFrame[0] > Constants.IntraFrame;
+        }
+
+        public bool HasSecondRef()
+        {
+            return RefFrame[1] > Constants.IntraFrame;
+        }
+
+        private static readonly int[][] IdxNColumnToSubblock = new int[][]
+        {
+            new int[] { 1, 2 }, new int[] { 1, 3 }, new int[] { 3, 2 }, new int[] { 3, 3 }
+        };
+
+        // This function returns either the appropriate sub block or block's mv
+        // on whether the block_size < 8x8 and we have check_sub_blocks set.
+        public Mv GetSubBlockMv(int whichMv, int searchCol, int blockIdx)
+        {
+            return blockIdx >= 0 && SbType < BlockSize.Block8x8
+                ? Bmi[IdxNColumnToSubblock[blockIdx][searchCol == 0 ? 1 : 0]].Mv[whichMv]
+                : Mv[whichMv];
+        }
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/MotionVectorContext.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/MotionVectorContext.cs
new file mode 100644
index 00000000..319c8dba
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/MotionVectorContext.cs
@@ -0,0 +1,14 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal enum MotionVectorContext
+    {
+        BothZero = 0,
+        ZeroPlusPredicted = 1,
+        BothPredicted = 2,
+        NewPlusNonIntra = 3,
+        BothNew = 4,
+        IntraPlusNonIntra = 5,
+        BothIntra = 6,
+        InvalidCase = 9
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/Mv.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/Mv.cs
new file mode 100644
index 00000000..c1f99ade
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/Mv.cs
@@ -0,0 +1,189 @@
+using Ryujinx.Common.Memory;
+using Ryujinx.Graphics.Video;
+using System;
+using System.Diagnostics;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct Mv
+    {
+        public short Row;
+        public short Col;
+
+        private static readonly byte[] LogInBase2 = new byte[]
+        {
+            0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+            4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
+            5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+            6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+            6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7,
+            7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+            7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+            7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+            7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+            7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8,
+            8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+            8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+            8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+            8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+            8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+            8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+            8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+            8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+            8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+            8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+            9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10
+        };
+
+        public bool UseMvHp()
+        {
+            const int kMvRefThresh = 64;  // Threshold for use of high-precision 1/8 mv
+            return Math.Abs(Row) < kMvRefThresh && Math.Abs(Col) < kMvRefThresh;
+        }
+
+        public static bool MvJointVertical(MvJointType type)
+        {
+            return type == MvJointType.MvJointHzvnz || type == MvJointType.MvJointHnzvnz;
+        }
+
+        public static bool MvJointHorizontal(MvJointType type)
+        {
+            return type == MvJointType.MvJointHnzvz || type == MvJointType.MvJointHnzvnz;
+        }
+
+        private static int MvClassBase(MvClassType c)
+        {
+            return c != 0 ? Constants.Class0Size << ((int)c + 2) : 0;
+        }
+
+        private static MvClassType GetMvClass(int z, Ptr<int> offset)
+        {
+            MvClassType c = (z >= Constants.Class0Size * 4096) ? MvClassType.MvClass10 : (MvClassType)LogInBase2[z >> 3];
+            if (!offset.IsNull)
+            {
+                offset.Value = z - MvClassBase(c);
+            }
+
+            return c;
+        }
+
+        private static void IncMvComponent(int v, ref Vp9BackwardUpdates counts, int comp, int incr, int usehp)
+        {
+            int s, z, c, o = 0, d, e, f;
+            Debug.Assert(v != 0); /* Should not be zero */
+            s = v < 0 ? 1 : 0;
+            counts.Sign[comp][s] += (uint)incr;
+            z = (s != 0 ? -v : v) - 1; /* Magnitude - 1 */
+
+            c = (int)GetMvClass(z, new Ptr<int>(ref o));
+            counts.Classes[comp][c] += (uint)incr;
+
+            d = (o >> 3);     /* Int mv data */
+            f = (o >> 1) & 3; /* Fractional pel mv data */
+            e = (o & 1);      /* High precision mv data */
+
+            if (c == (int)MvClassType.MvClass0)
+            {
+                counts.Class0[comp][d] += (uint)incr;
+                counts.Class0Fp[comp][d][f] += (uint)incr;
+                counts.Class0Hp[comp][e] += (uint)(usehp * incr);
+            }
+            else
+            {
+                int i;
+                int b = c + Constants.Class0Bits - 1;  // Number of bits
+                for (i = 0; i < b; ++i)
+                {
+                    counts.Bits[comp][i][((d >> i) & 1)] += (uint)incr;
+                }
+
+                counts.Fp[comp][f] += (uint)incr;
+                counts.Hp[comp][e] += (uint)(usehp * incr);
+            }
+        }
+
+        private MvJointType GetMvJoint()
+        {
+            if (Row == 0)
+            {
+                return Col == 0 ? MvJointType.MvJointZero : MvJointType.MvJointHnzvz;
+            }
+            else
+            {
+                return Col == 0 ? MvJointType.MvJointHzvnz : MvJointType.MvJointHnzvnz;
+            }
+        }
+
+        internal void IncMv(Ptr<Vp9BackwardUpdates> counts)
+        {
+            if (!counts.IsNull)
+            {
+                MvJointType j = GetMvJoint();
+                ++counts.Value.Joints[(int)j];
+
+                if (MvJointVertical(j))
+                {
+                    IncMvComponent(Row, ref counts.Value, 0, 1, 1);
+                }
+
+                if (MvJointHorizontal(j))
+                {
+                    IncMvComponent(Col, ref counts.Value, 1, 1, 1);
+                }
+            }
+        }
+
+        public void ClampMv(int minCol, int maxCol, int minRow, int maxRow)
+        {
+            Col = (short)Math.Clamp(Col, minCol, maxCol);
+            Row = (short)Math.Clamp(Row, minRow, maxRow);
+        }
+
+        private const int MvBorder = (16 << 3);  // Allow 16 pels in 1/8th pel units
+
+        public void ClampMvRef(ref MacroBlockD xd)
+        {
+            ClampMv(
+                xd.MbToLeftEdge - MvBorder,
+                xd.MbToRightEdge + MvBorder,
+                xd.MbToTopEdge - MvBorder,
+                xd.MbToBottomEdge + MvBorder);
+        }
+
+        public void LowerMvPrecision(bool allowHP)
+        {
+            bool useHP = allowHP && UseMvHp();
+            if (!useHP)
+            {
+                if ((Row & 1) != 0)
+                {
+                    Row += (short)(Row > 0 ? -1 : 1);
+                }
+
+                if ((Col & 1) != 0)
+                {
+                    Col += (short)(Col > 0 ? -1 : 1);
+                }
+            }
+        }
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/Mv32.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/Mv32.cs
new file mode 100644
index 00000000..fb25d18e
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/Mv32.cs
@@ -0,0 +1,8 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct Mv32
+    {
+        public int Row;
+        public int Col;
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/MvClassType.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/MvClassType.cs
new file mode 100644
index 00000000..68a0b59a
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/MvClassType.cs
@@ -0,0 +1,17 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal enum MvClassType
+    {
+        MvClass0 = 0,   /* (0, 2]     integer pel */
+        MvClass1 = 1,   /* (2, 4]     integer pel */
+        MvClass2 = 2,   /* (4, 8]     integer pel */
+        MvClass3 = 3,   /* (8, 16]    integer pel */
+        MvClass4 = 4,   /* (16, 32]   integer pel */
+        MvClass5 = 5,   /* (32, 64]   integer pel */
+        MvClass6 = 6,   /* (64, 128]  integer pel */
+        MvClass7 = 7,   /* (128, 256] integer pel */
+        MvClass8 = 8,   /* (256, 512] integer pel */
+        MvClass9 = 9,   /* (512, 1024] integer pel */
+        MvClass10 = 10, /* (1024,2048] integer pel */
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/MvJointType.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/MvJointType.cs
new file mode 100644
index 00000000..a20cb6d0
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/MvJointType.cs
@@ -0,0 +1,10 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal enum MvJointType
+    {
+        MvJointZero = 0,   /* Zero vector */
+        MvJointHnzvz = 1,  /* Vert zero, hor nonzero */
+        MvJointHzvnz = 2,  /* Hor zero, vert nonzero */
+        MvJointHnzvnz = 3, /* Both components nonzero */
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/MvRef.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/MvRef.cs
new file mode 100644
index 00000000..71949a09
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/MvRef.cs
@@ -0,0 +1,10 @@
+using Ryujinx.Common.Memory;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct MvRef
+    {
+        public Array2<Mv> Mv;
+        public Array2<sbyte> RefFrame;
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/PartitionType.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/PartitionType.cs
new file mode 100644
index 00000000..096f9818
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/PartitionType.cs
@@ -0,0 +1,12 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal enum PartitionType
+    {
+        PartitionNone,
+        PartitionHorz,
+        PartitionVert,
+        PartitionSplit,
+        PartitionTypes,
+        PartitionInvalid = PartitionTypes
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/PlaneType.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/PlaneType.cs
new file mode 100644
index 00000000..790aa2a0
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/PlaneType.cs
@@ -0,0 +1,9 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal enum PlaneType
+    {
+        Y = 0,
+        Uv = 1,
+        PlaneTypes
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/Position.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/Position.cs
new file mode 100644
index 00000000..0d3b56f6
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/Position.cs
@@ -0,0 +1,14 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct Position
+    {
+        public int Row;
+        public int Col;
+
+        public Position(int row, int col)
+        {
+            Row = row;
+            Col = col;
+        }
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/PredictionMode.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/PredictionMode.cs
new file mode 100644
index 00000000..bbb9be9a
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/PredictionMode.cs
@@ -0,0 +1,21 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal enum PredictionMode
+    {
+        DcPred = 0,    // Average of above and left pixels
+        VPred = 1,     // Vertical
+        HPred = 2,     // Horizontal
+        D45Pred = 3,   // Directional 45  deg = round(arctan(1 / 1) * 180 / pi)
+        D135Pred = 4,  // Directional 135 deg = 180 - 45
+        D117Pred = 5,  // Directional 117 deg = 180 - 63
+        D153Pred = 6,  // Directional 153 deg = 180 - 27
+        D207Pred = 7,  // Directional 207 deg = 180 + 27
+        D63Pred = 8,   // Directional 63  deg = round(arctan(2 / 1) * 180 / pi)
+        TmPred = 9,    // True-motion
+        NearestMv = 10,
+        NearMv = 11,
+        ZeroMv = 12,
+        NewMv = 13,
+        MbModeCount = 14
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/RefBuffer.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/RefBuffer.cs
new file mode 100644
index 00000000..9942dd05
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/RefBuffer.cs
@@ -0,0 +1,8 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct RefBuffer
+    {
+        public Surface Buf;
+        public ScaleFactors Sf;
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/ReferenceMode.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/ReferenceMode.cs
new file mode 100644
index 00000000..7cbf9f4e
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/ReferenceMode.cs
@@ -0,0 +1,10 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal enum ReferenceMode
+    {
+        SingleReference = 0,
+        CompoundReference = 1,
+        ReferenceModeSelect = 2,
+        ReferenceModes = 3
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/ScaleFactors.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/ScaleFactors.cs
new file mode 100644
index 00000000..970f9680
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/ScaleFactors.cs
@@ -0,0 +1,451 @@
+using Ryujinx.Common.Memory;
+using System.Runtime.CompilerServices;
+using static Ryujinx.Graphics.Nvdec.Vp9.Dsp.Convolve;
+using static Ryujinx.Graphics.Nvdec.Vp9.Dsp.Filter;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct ScaleFactors
+    {
+        private const int RefScaleShift = 14;
+        private const int RefNoScale = (1 << RefScaleShift);
+        private const int RefInvalidScale = -1;
+
+        private unsafe delegate void ConvolveFn(
+            byte* src,
+            int srcStride,
+            byte* dst,
+            int dstStride,
+            Array8<short>[] filter,
+            int x0Q4,
+            int xStepQ4,
+            int y0Q4,
+            int yStepQ4,
+            int w,
+            int h);
+
+        private unsafe delegate void HighbdConvolveFn(
+            ushort* src,
+            int srcStride,
+            ushort* dst,
+            int dstStride,
+            Array8<short>[] filter,
+            int x0Q4,
+            int xStepQ4,
+            int y0Q4,
+            int yStepQ4,
+            int w,
+            int h,
+            int bd);
+
+        private static readonly unsafe ConvolveFn[][][] PredictX16Y16 = new ConvolveFn[][][]
+        {
+            new ConvolveFn[][]
+            {
+                new ConvolveFn[]
+                {
+                    ConvolveCopy,
+                    ConvolveAvg
+                },
+                new ConvolveFn[]
+                {
+                    Convolve8Vert,
+                    Convolve8AvgVert
+                }
+            },
+            new ConvolveFn[][]
+            {
+                new ConvolveFn[]
+                {
+                    Convolve8Horiz,
+                    Convolve8AvgHoriz
+                },
+                new ConvolveFn[]
+                {
+                    Convolve8,
+                    Convolve8Avg
+                }
+            }
+        };
+
+        private static readonly unsafe ConvolveFn[][][] PredictX16 = new ConvolveFn[][][]
+        {
+            new ConvolveFn[][]
+            {
+                new ConvolveFn[]
+                {
+                    ScaledVert,
+                    ScaledAvgVert
+                },
+                new ConvolveFn[]
+                {
+                    ScaledVert,
+                    ScaledAvgVert
+                }
+            },
+            new ConvolveFn[][]
+            {
+                new ConvolveFn[]
+                {
+                    Scaled2D,
+                    ScaledAvg2D
+                },
+                new ConvolveFn[]
+                {
+                    Scaled2D,
+                    ScaledAvg2D
+                }
+            }
+        };
+
+        private static readonly unsafe ConvolveFn[][][] PredictY16 = new ConvolveFn[][][]
+        {
+            new ConvolveFn[][]
+            {
+                new ConvolveFn[]
+                {
+                    ScaledHoriz,
+                    ScaledAvgHoriz
+                },
+                new ConvolveFn[]
+                {
+                    Scaled2D,
+                    ScaledAvg2D
+                }
+            },
+            new ConvolveFn[][]
+            {
+                new ConvolveFn[]
+                {
+                    ScaledHoriz,
+                    ScaledAvgHoriz
+                },
+                new ConvolveFn[]
+                {
+                    Scaled2D,
+                    ScaledAvg2D
+                }
+            }
+        };
+
+        private static readonly unsafe ConvolveFn[][][] Predict = new ConvolveFn[][][]
+        {
+            new ConvolveFn[][]
+            {
+                new ConvolveFn[]
+                {
+                    Scaled2D,
+                    ScaledAvg2D
+                },
+                new ConvolveFn[]
+                {
+                    Scaled2D,
+                    ScaledAvg2D
+                }
+            },
+            new ConvolveFn[][]
+            {
+                new ConvolveFn[]
+                {
+                    Scaled2D,
+                    ScaledAvg2D
+                },
+                new ConvolveFn[]
+                {
+                    Scaled2D,
+                    ScaledAvg2D
+                }
+            }
+        };
+
+        private static readonly unsafe HighbdConvolveFn[][][] HighbdPredictX16Y16 = new HighbdConvolveFn[][][]
+        {
+            new HighbdConvolveFn[][]
+            {
+                new HighbdConvolveFn[]
+                {
+                    HighbdConvolveCopy,
+                    HighbdConvolveAvg
+                },
+                new HighbdConvolveFn[]
+                {
+                    HighbdConvolve8Vert,
+                    HighbdConvolve8AvgVert
+                }
+            },
+            new HighbdConvolveFn[][]
+            {
+                new HighbdConvolveFn[]
+                {
+                    HighbdConvolve8Horiz,
+                    HighbdConvolve8AvgHoriz
+                },
+                new HighbdConvolveFn[]
+                {
+                    HighbdConvolve8,
+                    HighbdConvolve8Avg
+                }
+            }
+        };
+
+        private static readonly unsafe HighbdConvolveFn[][][] HighbdPredictX16 = new HighbdConvolveFn[][][]
+        {
+            new HighbdConvolveFn[][]
+            {
+                new HighbdConvolveFn[]
+                {
+                    HighbdConvolve8Vert,
+                    HighbdConvolve8AvgVert
+                },
+                new HighbdConvolveFn[]
+                {
+                    HighbdConvolve8Vert,
+                    HighbdConvolve8AvgVert
+                }
+            },
+            new HighbdConvolveFn[][]
+            {
+                new HighbdConvolveFn[]
+                {
+                    HighbdConvolve8,
+                    HighbdConvolve8Avg
+                },
+                new HighbdConvolveFn[]
+                {
+                    HighbdConvolve8,
+                    HighbdConvolve8Avg
+                }
+            }
+        };
+
+        private static readonly unsafe HighbdConvolveFn[][][] HighbdPredictY16 = new HighbdConvolveFn[][][]
+        {
+            new HighbdConvolveFn[][]
+            {
+                new HighbdConvolveFn[]
+                {
+                    HighbdConvolve8Horiz,
+                    HighbdConvolve8AvgHoriz
+                },
+                new HighbdConvolveFn[]
+                {
+                    HighbdConvolve8,
+                    HighbdConvolve8Avg
+                }
+            },
+            new HighbdConvolveFn[][]
+            {
+                new HighbdConvolveFn[]
+                {
+                    HighbdConvolve8Horiz,
+                    HighbdConvolve8AvgHoriz
+                },
+                new HighbdConvolveFn[]
+                {
+                    HighbdConvolve8,
+                    HighbdConvolve8Avg
+                }
+            }
+        };
+
+        private static readonly unsafe HighbdConvolveFn[][][] HighbdPredict = new HighbdConvolveFn[][][]
+        {
+            new HighbdConvolveFn[][]
+            {
+                new HighbdConvolveFn[]
+                {
+                    HighbdConvolve8,
+                    HighbdConvolve8Avg
+                },
+                new HighbdConvolveFn[]
+                {
+                    HighbdConvolve8,
+                    HighbdConvolve8Avg
+                }
+            },
+            new HighbdConvolveFn[][]
+            {
+                new HighbdConvolveFn[]
+                {
+                    HighbdConvolve8,
+                    HighbdConvolve8Avg
+                },
+                new HighbdConvolveFn[]
+                {
+                    HighbdConvolve8,
+                    HighbdConvolve8Avg
+                }
+            }
+        };
+
+        public int XScaleFP;  // Horizontal fixed point scale factor
+        public int YScaleFP;  // Vertical fixed point scale factor
+        public int XStepQ4;
+        public int YStepQ4;
+
+        public int ScaleValueX(int val)
+        {
+            return IsScaled() ? ScaledX(val) : val;
+        }
+
+        public int ScaleValueY(int val)
+        {
+            return IsScaled() ? ScaledY(val) : val;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public unsafe void InterPredict(
+            int horiz,
+            int vert,
+            int avg,
+            byte* src,
+            int srcStride,
+            byte* dst,
+            int dstStride,
+            int subpelX,
+            int subpelY,
+            int w,
+            int h,
+            Array8<short>[] kernel,
+            int xs,
+            int ys)
+        {
+            if (XStepQ4 == 16)
+            {
+                if (YStepQ4 == 16)
+                {
+                    // No scaling in either direction.
+                    PredictX16Y16[horiz][vert][avg](src, srcStride, dst, dstStride, kernel, subpelX, xs, subpelY, ys, w, h);
+                }
+                else
+                {
+                    // No scaling in x direction. Must always scale in the y direction.
+                    PredictX16[horiz][vert][avg](src, srcStride, dst, dstStride, kernel, subpelX, xs, subpelY, ys, w, h);
+                }
+            }
+            else
+            {
+                if (YStepQ4 == 16)
+                {
+                    // No scaling in the y direction. Must always scale in the x direction.
+                    PredictY16[horiz][vert][avg](src, srcStride, dst, dstStride, kernel, subpelX, xs, subpelY, ys, w, h);
+                }
+                else
+                {
+                    // Must always scale in both directions.
+                    Predict[horiz][vert][avg](src, srcStride, dst, dstStride, kernel, subpelX, xs, subpelY, ys, w, h);
+                }
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public unsafe void HighbdInterPredict(
+            int horiz,
+            int vert,
+            int avg,
+            ushort* src,
+            int srcStride,
+            ushort* dst,
+            int dstStride,
+            int subpelX,
+            int subpelY,
+            int w,
+            int h,
+            Array8<short>[] kernel,
+            int xs,
+            int ys,
+            int bd)
+        {
+            if (XStepQ4 == 16)
+            {
+                if (YStepQ4 == 16)
+                {
+                    // No scaling in either direction.
+                    HighbdPredictX16Y16[horiz][vert][avg](src, srcStride, dst, dstStride, kernel, subpelX, xs, subpelY, ys, w, h, bd);
+                }
+                else
+                {
+                    // No scaling in x direction. Must always scale in the y direction.
+                    HighbdPredictX16[horiz][vert][avg](src, srcStride, dst, dstStride, kernel, subpelX, xs, subpelY, ys, w, h, bd);
+                }
+            }
+            else
+            {
+                if (YStepQ4 == 16)
+                {
+                    // No scaling in the y direction. Must always scale in the x direction.
+                    HighbdPredictY16[horiz][vert][avg](src, srcStride, dst, dstStride, kernel, subpelX, xs, subpelY, ys, w, h, bd);
+                }
+                else
+                {
+                    // Must always scale in both directions.
+                    HighbdPredict[horiz][vert][avg](src, srcStride, dst, dstStride, kernel, subpelX, xs, subpelY, ys, w, h, bd);
+                }
+            }
+        }
+
+        private int ScaledX(int val)
+        {
+            return (int)((long)val * XScaleFP >> RefScaleShift);
+        }
+
+        private int ScaledY(int val)
+        {
+            return (int)((long)val * YScaleFP >> RefScaleShift);
+        }
+
+        private static int GetFixedPointScaleFactor(int otherSize, int thisSize)
+        {
+            // Calculate scaling factor once for each reference frame
+            // and use fixed point scaling factors in decoding and encoding routines.
+            // Hardware implementations can calculate scale factor in device driver
+            // and use multiplication and shifting on hardware instead of division.
+            return (otherSize << RefScaleShift) / thisSize;
+        }
+
+        public Mv32 ScaleMv(ref Mv mv, int x, int y)
+        {
+            int xOffQ4 = ScaledX(x << SubpelBits) & SubpelMask;
+            int yOffQ4 = ScaledY(y << SubpelBits) & SubpelMask;
+            Mv32 res = new Mv32()
+            {
+                Row = ScaledY(mv.Row) + yOffQ4,
+                Col = ScaledX(mv.Col) + xOffQ4
+            };
+            return res;
+        }
+
+        public bool IsValidScale()
+        {
+            return XScaleFP != RefInvalidScale && YScaleFP != RefInvalidScale;
+        }
+
+        public bool IsScaled()
+        {
+            return IsValidScale() && (XScaleFP != RefNoScale || YScaleFP != RefNoScale);
+        }
+
+        public static bool ValidRefFrameSize(int refWidth, int refHeight, int thisWidth, int thisHeight)
+        {
+            return 2 * thisWidth >= refWidth &&
+                   2 * thisHeight >= refHeight &&
+                   thisWidth <= 16 * refWidth &&
+                   thisHeight <= 16 * refHeight;
+        }
+
+        public void SetupScaleFactorsForFrame(int otherW, int otherH, int thisW, int thisH)
+        {
+            if (!ValidRefFrameSize(otherW, otherH, thisW, thisH))
+            {
+                XScaleFP = RefInvalidScale;
+                YScaleFP = RefInvalidScale;
+                return;
+            }
+
+            XScaleFP = GetFixedPointScaleFactor(otherW, thisW);
+            YScaleFP = GetFixedPointScaleFactor(otherH, thisH);
+            XStepQ4 = ScaledX(16);
+            YStepQ4 = ScaledY(16);
+        }
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/SegLvlFeatures.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/SegLvlFeatures.cs
new file mode 100644
index 00000000..c3ea3fd8
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/SegLvlFeatures.cs
@@ -0,0 +1,11 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal enum SegLvlFeatures
+    {
+        SegLvlAltQ = 0,      // Use alternate Quantizer ....
+        SegLvlAltLf = 1,     // Use alternate loop filter value...
+        SegLvlRefFrame = 2,  // Optional Segment reference frame
+        SegLvlSkip = 3,      // Optional Segment (0,0) + skip mode
+        SegLvlMax = 4        // Number of features supported
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/Segmentation.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/Segmentation.cs
new file mode 100644
index 00000000..53d1f2cc
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/Segmentation.cs
@@ -0,0 +1,71 @@
+using Ryujinx.Common.Memory;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct Segmentation
+    {
+        private static readonly int[] SegFeatureDataSigned = new int[] { 1, 1, 0, 0 };
+        private static readonly int[] SegFeatureDataMax = new int[] { QuantCommon.MaxQ, Vp9.LoopFilter.MaxLoopFilter, 3, 0 };
+
+        public bool Enabled;
+        public bool UpdateMap;
+        public byte UpdateData;
+        public byte AbsDelta;
+        public bool TemporalUpdate;
+
+        public Array8<Array4<short>> FeatureData;
+        public Array8<uint> FeatureMask;
+        public int AqAvOffset;
+
+        public static byte GetPredProbSegId(ref Array3<byte> segPredProbs, ref MacroBlockD xd)
+        {
+            return segPredProbs[xd.GetPredContextSegId()];
+        }
+
+        public void ClearAllSegFeatures()
+        {
+            MemoryMarshal.CreateSpan(ref FeatureData[0][0], 8 * 4).Fill(0);
+            MemoryMarshal.CreateSpan(ref FeatureMask[0], 8).Fill(0);
+            AqAvOffset = 0;
+        }
+
+        internal void EnableSegFeature(int segmentId, SegLvlFeatures featureId)
+        {
+            FeatureMask[segmentId] |= 1u << (int)featureId;
+        }
+
+        internal static int FeatureDataMax(SegLvlFeatures featureId)
+        {
+            return SegFeatureDataMax[(int)featureId];
+        }
+
+        internal static int IsSegFeatureSigned(SegLvlFeatures featureId)
+        {
+            return SegFeatureDataSigned[(int)featureId];
+        }
+
+        internal void SetSegData(int segmentId, SegLvlFeatures featureId, int segData)
+        {
+            Debug.Assert(segData <= SegFeatureDataMax[(int)featureId]);
+            if (segData < 0)
+            {
+                Debug.Assert(SegFeatureDataSigned[(int)featureId] != 0);
+                Debug.Assert(-segData <= SegFeatureDataMax[(int)featureId]);
+            }
+
+            FeatureData[segmentId][(int)featureId] = (short)segData;
+        }
+
+        internal int IsSegFeatureActive(int segmentId, SegLvlFeatures featureId)
+        {
+            return Enabled && (FeatureMask[segmentId] & (1 << (int)featureId)) != 0 ? 1 : 0;
+        }
+
+        internal short GetSegData(int segmentId, SegLvlFeatures featureId)
+        {
+            return FeatureData[segmentId][(int)featureId];
+        }
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/Surface.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/Surface.cs
new file mode 100644
index 00000000..2b2a173e
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/Surface.cs
@@ -0,0 +1,80 @@
+using Ryujinx.Common.Memory;
+using Ryujinx.Graphics.Video;
+using System;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct Surface : ISurface
+    {
+        public ArrayPtr<byte> YBuffer;
+        public ArrayPtr<byte> UBuffer;
+        public ArrayPtr<byte> VBuffer;
+
+        public unsafe Plane YPlane => new Plane((IntPtr)YBuffer.ToPointer(), YBuffer.Length);
+        public unsafe Plane UPlane => new Plane((IntPtr)UBuffer.ToPointer(), UBuffer.Length);
+        public unsafe Plane VPlane => new Plane((IntPtr)VBuffer.ToPointer(), VBuffer.Length);
+
+        public int Width { get; }
+        public int Height { get; }
+        public int AlignedWidth { get; }
+        public int AlignedHeight { get; }
+        public int Stride { get; }
+        public int UvWidth { get; }
+        public int UvHeight { get; }
+        public int UvAlignedWidth { get; }
+        public int UvAlignedHeight { get; }
+        public int UvStride { get; }
+        public bool HighBd => false;
+
+        private readonly IntPtr _pointer;
+
+        public Surface(int width, int height)
+        {
+            const int border = 32;
+            const int ssX = 1;
+            const int ssY = 1;
+            const bool highbd = false;
+
+            int alignedWidth = (width + 7) & ~7;
+            int alignedHeight = (height + 7) & ~7;
+            int yStride = ((alignedWidth + 2 * border) + 31) & ~31;
+            int yplaneSize = (alignedHeight + 2 * border) * yStride;
+            int uvWidth = alignedWidth >> ssX;
+            int uvHeight = alignedHeight >> ssY;
+            int uvStride = yStride >> ssX;
+            int uvBorderW = border >> ssX;
+            int uvBorderH = border >> ssY;
+            int uvplaneSize = (uvHeight + 2 * uvBorderH) * uvStride;
+
+            int frameSize = (highbd ? 2 : 1) * (yplaneSize + 2 * uvplaneSize);
+
+            IntPtr pointer = Marshal.AllocHGlobal(frameSize);
+            _pointer = pointer;
+            Width = width;
+            Height = height;
+            AlignedWidth = alignedWidth;
+            AlignedHeight = alignedHeight;
+            Stride = yStride;
+            UvWidth = (width + ssX) >> ssX;
+            UvHeight = (height + ssY) >> ssY;
+            UvAlignedWidth = uvWidth;
+            UvAlignedHeight = uvHeight;
+            UvStride = uvStride;
+
+            ArrayPtr<byte> NewPlane(int start, int size, int border)
+            {
+                return new ArrayPtr<byte>(pointer + start + border, size - border);
+            }
+
+            YBuffer = NewPlane(0, yplaneSize, (border * yStride) + border);
+            UBuffer = NewPlane(yplaneSize, uvplaneSize, (uvBorderH * uvStride) + uvBorderW);
+            VBuffer = NewPlane(yplaneSize + uvplaneSize, uvplaneSize, (uvBorderH * uvStride) + uvBorderW);
+        }
+
+        public void Dispose()
+        {
+            Marshal.FreeHGlobal(_pointer);
+        }
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/TileInfo.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/TileInfo.cs
new file mode 100644
index 00000000..67289c47
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/TileInfo.cs
@@ -0,0 +1,85 @@
+using Ryujinx.Graphics.Nvdec.Vp9.Common;
+using System;
+using System.Diagnostics;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct TileInfo
+    {
+        private const int MinTileWidthB64 = 4;
+        private const int MaxTileWidthB64 = 64;
+
+        public int MiRowStart, MiRowEnd;
+        public int MiColStart, MiColEnd;
+
+        public static int MiColsAlignedToSb(int nMis)
+        {
+            return BitUtils.AlignPowerOfTwo(nMis, Constants.MiBlockSizeLog2);
+        }
+
+        private static int GetTileOffset(int idx, int mis, int log2)
+        {
+            int sbCols = MiColsAlignedToSb(mis) >> Constants.MiBlockSizeLog2;
+            int offset = ((idx * sbCols) >> log2) << Constants.MiBlockSizeLog2;
+            return Math.Min(offset, mis);
+        }
+
+        public void SetRow(ref Vp9Common cm, int row)
+        {
+            MiRowStart = GetTileOffset(row, cm.MiRows, cm.Log2TileRows);
+            MiRowEnd = GetTileOffset(row + 1, cm.MiRows, cm.Log2TileRows);
+        }
+
+        public void SetCol(ref Vp9Common cm, int col)
+        {
+            MiColStart = GetTileOffset(col, cm.MiCols, cm.Log2TileCols);
+            MiColEnd = GetTileOffset(col + 1, cm.MiCols, cm.Log2TileCols);
+        }
+
+        public void Init(ref Vp9Common cm, int row, int col)
+        {
+            SetRow(ref cm, row);
+            SetCol(ref cm, col);
+        }
+
+        // Checks that the given miRow, miCol and search point
+        // are inside the borders of the tile.
+        public bool IsInside(int miCol, int miRow, int miRows, ref Position miPos)
+        {
+            return !(miRow + miPos.Row < 0 ||
+                     miCol + miPos.Col < MiColStart ||
+                     miRow + miPos.Row >= miRows ||
+                     miCol + miPos.Col >= MiColEnd);
+        }
+
+        private static int GetMinLog2TileCols(int sb64Cols)
+        {
+            int minLog2 = 0;
+            while ((MaxTileWidthB64 << minLog2) < sb64Cols)
+            {
+                ++minLog2;
+            }
+
+            return minLog2;
+        }
+
+        private static int GetMaxLog2TileCols(int sb64Cols)
+        {
+            int maxLog2 = 1;
+            while ((sb64Cols >> maxLog2) >= MinTileWidthB64)
+            {
+                ++maxLog2;
+            }
+
+            return maxLog2 - 1;
+        }
+
+        public static void GetTileNBits(int miCols, ref int minLog2TileCols, ref int maxLog2TileCols)
+        {
+            int sb64Cols = MiColsAlignedToSb(miCols) >> Constants.MiBlockSizeLog2;
+            minLog2TileCols = GetMinLog2TileCols(sb64Cols);
+            maxLog2TileCols = GetMaxLog2TileCols(sb64Cols);
+            Debug.Assert(minLog2TileCols <= maxLog2TileCols);
+        }
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/TxMode.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/TxMode.cs
new file mode 100644
index 00000000..db914525
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/TxMode.cs
@@ -0,0 +1,12 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    public enum TxMode
+    {
+        Only4X4 = 0,      // Only 4x4 transform used
+        Allow8X8 = 1,     // Allow block transform size up to 8x8
+        Allow16X16 = 2,   // Allow block transform size up to 16x16
+        Allow32X32 = 3,   // Allow block transform size up to 32x32
+        TxModeSelect = 4, // Transform specified for each block
+        TxModes = 5
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/TxSize.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/TxSize.cs
new file mode 100644
index 00000000..994deb2c
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/TxSize.cs
@@ -0,0 +1,11 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    public enum TxSize
+    {
+        Tx4x4 = 0,   // 4x4 transform
+        Tx8x8 = 1,   // 8x8 transform
+        Tx16x16 = 2, // 16x16 transform
+        Tx32x32 = 3, // 32x32 transform
+        TxSizes = 4
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/TxType.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/TxType.cs
new file mode 100644
index 00000000..dbf7251c
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/TxType.cs
@@ -0,0 +1,11 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal enum TxType
+    {
+        DctDct = 0,   // DCT  in both horizontal and vertical
+        AdstDct = 1,  // ADST in vertical, DCT in horizontal
+        DctAdst = 2,  // DCT  in vertical, ADST in horizontal
+        AdstAdst = 3, // ADST in both directions
+        TxTypes = 4
+    }
+}
diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Types/Vp9Common.cs b/Ryujinx.Graphics.Nvdec.Vp9/Types/Vp9Common.cs
new file mode 100644
index 00000000..0dafb820
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Types/Vp9Common.cs
@@ -0,0 +1,334 @@
+using Ryujinx.Common.Memory;
+using Ryujinx.Graphics.Nvdec.Vp9.Common;
+using Ryujinx.Graphics.Video;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal struct Vp9Common
+    {
+        public MacroBlockD Mb;
+
+        public ArrayPtr<TileWorkerData> TileWorkerData;
+
+        public InternalErrorInfo Error;
+
+        public int Width;
+        public int Height;
+
+        public int SubsamplingX;
+        public int SubsamplingY;
+
+        public ArrayPtr<MvRef> PrevFrameMvs;
+        public ArrayPtr<MvRef> CurFrameMvs;
+
+        public Array3<RefBuffer> FrameRefs;
+
+        public FrameType FrameType;
+
+        // Flag signaling that the frame is encoded using only Intra modes.
+        public bool IntraOnly;
+
+        public bool AllowHighPrecisionMv;
+
+        // MBs, MbRows/Cols is in 16-pixel units; MiRows/Cols is in
+        // ModeInfo (8-pixel) units.
+        public int MBs;
+        public int MbRows, MiRows;
+        public int MbCols, MiCols;
+        public int MiStride;
+
+        /* Profile settings */
+        public TxMode TxMode;
+
+        public int BaseQindex;
+        public int YDcDeltaQ;
+        public int UvDcDeltaQ;
+        public int UvAcDeltaQ;
+        public Array8<Array2<short>> YDequant;
+        public Array8<Array2<short>> UvDequant;
+
+        /* We allocate a ModeInfo struct for each macroblock, together with
+           an extra row on top and column on the left to simplify prediction. */
+        public ArrayPtr<ModeInfo> Mip; /* Base of allocated array */
+        public ArrayPtr<ModeInfo> Mi;  /* Corresponds to upper left visible macroblock */
+
+        public ArrayPtr<Ptr<ModeInfo>> MiGridBase;
+        public ArrayPtr<Ptr<ModeInfo>> MiGridVisible;
+
+        // Whether to use previous frame's motion vectors for prediction.
+        public bool UsePrevFrameMvs;
+
+        // Persistent mb segment id map used in prediction.
+        public int SegMapIdx;
+        public int PrevSegMapIdx;
+
+        public Array2<ArrayPtr<byte>> SegMapArray;
+        public ArrayPtr<byte> LastFrameSegMap;
+        public ArrayPtr<byte> CurrentFrameSegMap;
+
+        public byte InterpFilter;
+
+        public LoopFilterInfoN LfInfo;
+
+        public Array4<sbyte> RefFrameSignBias; /* Two state 0, 1 */
+
+        public LoopFilter Lf;
+        public Segmentation Seg;
+
+        // Context probabilities for reference frame prediction
+        public sbyte CompFixedRef;
+        public Array2<sbyte> CompVarRef;
+        public ReferenceMode ReferenceMode;
+
+        public Ptr<Vp9EntropyProbs> Fc;
+        public Ptr<Vp9BackwardUpdates> Counts;
+
+        public bool FrameParallelDecodingMode;
+
+        public int Log2TileCols, Log2TileRows;
+
+        public ArrayPtr<sbyte> AboveSegContext;
+        public ArrayPtr<sbyte> AboveContext;
+        public int AboveContextAllocCols;
+
+        public bool FrameIsIntraOnly()
+        {
+            return FrameType == FrameType.KeyFrame || IntraOnly;
+        }
+
+        public bool CompoundReferenceAllowed()
+        {
+            int i;
+            for (i = 1; i < Constants.RefsPerFrame; ++i)
+            {
+                if (RefFrameSignBias[i + 1] != RefFrameSignBias[1])
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        private static int CalcMiSize(int len)
+        {
+            // Len is in mi units.
+            return len + Constants.MiBlockSize;
+        }
+
+        public void SetMbMi(int width, int height)
+        {
+            int alignedWidth = BitUtils.AlignPowerOfTwo(width, Constants.MiSizeLog2);
+            int alignedHeight = BitUtils.AlignPowerOfTwo(height, Constants.MiSizeLog2);
+
+            MiCols = alignedWidth >> Constants.MiSizeLog2;
+            MiRows = alignedHeight >> Constants.MiSizeLog2;
+            MiStride = CalcMiSize(MiCols);
+
+            MbCols = (MiCols + 1) >> 1;
+            MbRows = (MiRows + 1) >> 1;
+            MBs = MbRows * MbCols;
+        }
+
+        public void AllocTileWorkerData(MemoryAllocator allocator, int tileCols, int tileRows)
+        {
+            TileWorkerData = allocator.Allocate<TileWorkerData>(tileCols * tileRows);
+        }
+
+        public void FreeTileWorkerData(MemoryAllocator allocator)
+        {
+            allocator.Free(TileWorkerData);
+        }
+
+        private void AllocSegMap(MemoryAllocator allocator, int segMapSize)
+        {
+            int i;
+
+            for (i = 0; i < Constants.NumPingPongBuffers; ++i)
+            {
+                SegMapArray[i] = allocator.Allocate<byte>(segMapSize);
+            }
+
+            // Init the index.
+            SegMapIdx = 0;
+            PrevSegMapIdx = 1;
+
+            CurrentFrameSegMap = SegMapArray[SegMapIdx];
+            LastFrameSegMap = SegMapArray[PrevSegMapIdx];
+        }
+
+        private void FreeSegMap(MemoryAllocator allocator)
+        {
+            int i;
+
+            for (i = 0; i < Constants.NumPingPongBuffers; ++i)
+            {
+                allocator.Free(SegMapArray[i]);
+                SegMapArray[i] = ArrayPtr<byte>.Null;
+            }
+
+            CurrentFrameSegMap = ArrayPtr<byte>.Null;
+            LastFrameSegMap = ArrayPtr<byte>.Null;
+        }
+
+        private void DecAllocMi(MemoryAllocator allocator, int miSize)
+        {
+            Mip = allocator.Allocate<ModeInfo>(miSize);
+            MiGridBase = allocator.Allocate<Ptr<ModeInfo>>(miSize);
+        }
+
+        private void DecFreeMi(MemoryAllocator allocator)
+        {
+            allocator.Free(Mip);
+            Mip = ArrayPtr<ModeInfo>.Null;
+            allocator.Free(MiGridBase);
+            MiGridBase = ArrayPtr<Ptr<ModeInfo>>.Null;
+        }
+
+        public void FreeContextBuffers(MemoryAllocator allocator)
+        {
+            DecFreeMi(allocator);
+            FreeSegMap(allocator);
+            allocator.Free(AboveContext);
+            AboveContext = ArrayPtr<sbyte>.Null;
+            allocator.Free(AboveSegContext);
+            AboveSegContext = ArrayPtr<sbyte>.Null;
+            allocator.Free(Lf.Lfm);
+            Lf.Lfm = ArrayPtr<LoopFilterMask>.Null;
+            allocator.Free(CurFrameMvs);
+            CurFrameMvs = ArrayPtr<MvRef>.Null;
+            if (UsePrevFrameMvs)
+            {
+                allocator.Free(PrevFrameMvs);
+                PrevFrameMvs = ArrayPtr<MvRef>.Null;
+            }
+        }
+
+        private void AllocLoopFilter(MemoryAllocator allocator)
+        {
+            // Each lfm holds bit masks for all the 8x8 blocks in a 64x64 region. The
+            // stride and rows are rounded up / truncated to a multiple of 8.
+            Lf.LfmStride = (MiCols + (Constants.MiBlockSize - 1)) >> 3;
+            Lf.Lfm = allocator.Allocate<LoopFilterMask>(((MiRows + (Constants.MiBlockSize - 1)) >> 3) * Lf.LfmStride);
+        }
+
+        public void AllocContextBuffers(MemoryAllocator allocator, int width, int height)
+        {
+            SetMbMi(width, height);
+            int newMiSize = MiStride * CalcMiSize(MiRows);
+            if (newMiSize != 0)
+            {
+                DecAllocMi(allocator, newMiSize);
+            }
+
+            if (MiRows * MiCols != 0)
+            {
+                // Create the segmentation map structure and set to 0.
+                AllocSegMap(allocator, MiRows * MiCols);
+            }
+
+            if (MiCols != 0)
+            {
+                AboveContext = allocator.Allocate<sbyte>(2 * TileInfo.MiColsAlignedToSb(MiCols) * Constants.MaxMbPlane);
+                AboveSegContext = allocator.Allocate<sbyte>(TileInfo.MiColsAlignedToSb(MiCols));
+            }
+
+            AllocLoopFilter(allocator);
+
+            CurFrameMvs = allocator.Allocate<MvRef>(MiRows * MiCols);
+            // Using the same size as the current frame is fine here,
+            // as this is never true when we have a resolution change.
+            if (UsePrevFrameMvs)
+            {
+                PrevFrameMvs = allocator.Allocate<MvRef>(MiRows * MiCols);
+            }
+        }
+
+        private unsafe void DecSetupMi()
+        {
+            Mi = Mip.Slice(MiStride + 1);
+            MiGridVisible = MiGridBase.Slice(MiStride + 1);
+            MemoryUtil.Fill(MiGridBase.ToPointer(), Ptr<ModeInfo>.Null, MiStride * (MiRows + 1));
+        }
+
+        public unsafe void InitContextBuffers()
+        {
+            DecSetupMi();
+            if (!LastFrameSegMap.IsNull)
+            {
+                MemoryUtil.Fill(LastFrameSegMap.ToPointer(), (byte)0, MiRows * MiCols);
+            }
+        }
+
+        private void SetPartitionProbs(ref MacroBlockD xd)
+        {
+            xd.PartitionProbs = FrameIsIntraOnly()
+                ? new ArrayPtr<Array3<byte>>(ref Fc.Value.KfPartitionProb[0], 16)
+                : new ArrayPtr<Array3<byte>>(ref Fc.Value.PartitionProb[0], 16);
+        }
+
+        internal void InitMacroBlockD(ref MacroBlockD xd, ArrayPtr<int> dqcoeff)
+        {
+            int i;
+
+            for (i = 0; i < Constants.MaxMbPlane; ++i)
+            {
+                xd.Plane[i].DqCoeff = dqcoeff;
+                xd.AboveContext[i] = AboveContext.Slice(i * 2 * TileInfo.MiColsAlignedToSb(MiCols));
+
+                if (i == 0)
+                {
+                    MemoryUtil.Copy(ref xd.Plane[i].SegDequant, ref YDequant);
+                }
+                else
+                {
+                    MemoryUtil.Copy(ref xd.Plane[i].SegDequant, ref UvDequant);
+                }
+                xd.Fc = new Ptr<Vp9EntropyProbs>(ref Fc.Value);
+            }
+
+            xd.AboveSegContext = AboveSegContext;
+            xd.MiStride = MiStride;
+            xd.ErrorInfo = new Ptr<InternalErrorInfo>(ref Error);
+
+            SetPartitionProbs(ref xd);
+        }
+
+        public void SetupSegmentationDequant()
+        {
+            const BitDepth bitDepth = BitDepth.Bits8; // TODO: Configurable
+            // Build y/uv dequant values based on segmentation.
+            if (Seg.Enabled)
+            {
+                int i;
+                for (i = 0; i < Constants.MaxSegments; ++i)
+                {
+                    int qIndex = QuantCommon.GetQIndex(ref Seg, i, BaseQindex);
+                    YDequant[i][0] = QuantCommon.DcQuant(qIndex, YDcDeltaQ, bitDepth);
+                    YDequant[i][1] = QuantCommon.AcQuant(qIndex, 0, bitDepth);
+                    UvDequant[i][0] = QuantCommon.DcQuant(qIndex, UvDcDeltaQ, bitDepth);
+                    UvDequant[i][1] = QuantCommon.AcQuant(qIndex, UvAcDeltaQ, bitDepth);
+                }
+            }
+            else
+            {
+                int qIndex = BaseQindex;
+                // When segmentation is disabled, only the first value is used.  The
+                // remaining are don't cares.
+                YDequant[0][0] = QuantCommon.DcQuant(qIndex, YDcDeltaQ, bitDepth);
+                YDequant[0][1] = QuantCommon.AcQuant(qIndex, 0, bitDepth);
+                UvDequant[0][0] = QuantCommon.DcQuant(qIndex, UvDcDeltaQ, bitDepth);
+                UvDequant[0][1] = QuantCommon.AcQuant(qIndex, UvAcDeltaQ, bitDepth);
+            }
+        }
+
+        public void SetupScaleFactors()
+        {
+            for (int i = 0; i < Constants.RefsPerFrame; ++i)
+            {
+                ref RefBuffer refBuf = ref FrameRefs[i];
+                refBuf.Sf.SetupScaleFactorsForFrame(refBuf.Buf.Width, refBuf.Buf.Height, Width, Height);
+            }
+        }
+    }
+}