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using Ryujinx.Common.Memory;
using Ryujinx.Graphics.Nvdec.Vp9.Types;
using System;
using System.Diagnostics;
using System.Runtime.CompilerServices;
using static Ryujinx.Graphics.Nvdec.Vp9.Dsp.Filter;
namespace Ryujinx.Graphics.Nvdec.Vp9
{
internal static class ReconInter
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static unsafe void InterPredictor(
byte* src,
int srcStride,
byte* dst,
int dstStride,
int subpelX,
int subpelY,
ref ScaleFactors sf,
int w,
int h,
int refr,
Array8<short>[] kernel,
int xs,
int ys)
{
sf.InterPredict(
subpelX != 0 ? 1 : 0,
subpelY != 0 ? 1 : 0,
refr,
src,
srcStride,
dst,
dstStride,
subpelX,
subpelY,
w,
h,
kernel,
xs,
ys);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static unsafe void HighbdInterPredictor(
ushort* src,
int srcStride,
ushort* dst,
int dstStride,
int subpelX,
int subpelY,
ref ScaleFactors sf,
int w,
int h,
int refr,
Array8<short>[] kernel,
int xs,
int ys,
int bd)
{
sf.HighbdInterPredict(
subpelX != 0 ? 1 : 0,
subpelY != 0 ? 1 : 0,
refr,
src,
srcStride,
dst,
dstStride,
subpelX,
subpelY,
w,
h,
kernel,
xs,
ys,
bd);
}
private static int RoundMvCompQ4(int value)
{
return (value < 0 ? value - 2 : value + 2) / 4;
}
private static Mv MiMvPredQ4(ref ModeInfo mi, int idx)
{
return new Mv
{
Row = (short)RoundMvCompQ4(
mi.Bmi[0].Mv[idx].Row + mi.Bmi[1].Mv[idx].Row +
mi.Bmi[2].Mv[idx].Row + mi.Bmi[3].Mv[idx].Row),
Col = (short)RoundMvCompQ4(
mi.Bmi[0].Mv[idx].Col + mi.Bmi[1].Mv[idx].Col +
mi.Bmi[2].Mv[idx].Col + mi.Bmi[3].Mv[idx].Col),
};
}
private static int RoundMvCompQ2(int value)
{
return (value < 0 ? value - 1 : value + 1) / 2;
}
private static Mv MiMvPredQ2(ref ModeInfo mi, int idx, int block0, int block1)
{
return new Mv
{
Row = (short)RoundMvCompQ2(
mi.Bmi[block0].Mv[idx].Row +
mi.Bmi[block1].Mv[idx].Row),
Col = (short)RoundMvCompQ2(
mi.Bmi[block0].Mv[idx].Col +
mi.Bmi[block1].Mv[idx].Col),
};
}
public static Mv ClampMvToUmvBorderSb(ref MacroBlockD xd, ref Mv srcMv, int bw, int bh, int ssX, int ssY)
{
// If the MV points so far into the UMV border that no visible pixels
// are used for reconstruction, the subpel part of the MV can be
// discarded and the MV limited to 16 pixels with equivalent results.
int spelLeft = (Constants.Vp9InterpExtend + bw) << SubpelBits;
int spelRight = spelLeft - SubpelShifts;
int spelTop = (Constants.Vp9InterpExtend + bh) << SubpelBits;
int spelBottom = spelTop - SubpelShifts;
Mv clampedMv = new()
{
Row = (short)(srcMv.Row * (1 << (1 - ssY))),
Col = (short)(srcMv.Col * (1 << (1 - ssX))),
};
Debug.Assert(ssX <= 1);
Debug.Assert(ssY <= 1);
clampedMv.ClampMv(
xd.MbToLeftEdge * (1 << (1 - ssX)) - spelLeft,
xd.MbToRightEdge * (1 << (1 - ssX)) + spelRight,
xd.MbToTopEdge * (1 << (1 - ssY)) - spelTop,
xd.MbToBottomEdge * (1 << (1 - ssY)) + spelBottom);
return clampedMv;
}
public static Mv AverageSplitMvs(ref MacroBlockDPlane pd, ref ModeInfo mi, int refr, int block)
{
int ssIdx = ((pd.SubsamplingX > 0 ? 1 : 0) << 1) | (pd.SubsamplingY > 0 ? 1 : 0);
Mv res = new();
switch (ssIdx)
{
case 0:
res = mi.Bmi[block].Mv[refr];
break;
case 1:
res = MiMvPredQ2(ref mi, refr, block, block + 2);
break;
case 2:
res = MiMvPredQ2(ref mi, refr, block, block + 1);
break;
case 3:
res = MiMvPredQ4(ref mi, refr);
break;
default:
Debug.Assert(ssIdx <= 3 && ssIdx >= 0);
break;
}
return res;
}
private static int ScaledBufferOffset(int xOffset, int yOffset, int stride, Ptr<ScaleFactors> sf)
{
int x = !sf.IsNull ? sf.Value.ScaleValueX(xOffset) : xOffset;
int y = !sf.IsNull ? sf.Value.ScaleValueY(yOffset) : yOffset;
return y * stride + x;
}
private static void SetupPredPlanes(
ref Buf2D dst,
ArrayPtr<byte> src,
int stride,
int miRow,
int miCol,
Ptr<ScaleFactors> scale,
int subsamplingX,
int subsamplingY)
{
int x = (Constants.MiSize * miCol) >> subsamplingX;
int y = (Constants.MiSize * miRow) >> subsamplingY;
dst.Buf = src.Slice(ScaledBufferOffset(x, y, stride, scale));
dst.Stride = stride;
}
public static void SetupDstPlanes(
ref Array3<MacroBlockDPlane> planes,
ref Surface src,
int miRow,
int miCol)
{
Span<ArrayPtr<byte>> buffers = stackalloc ArrayPtr<byte>[Constants.MaxMbPlane];
buffers[0] = src.YBuffer;
buffers[1] = src.UBuffer;
buffers[2] = src.VBuffer;
Span<int> strides = stackalloc int[Constants.MaxMbPlane];
strides[0] = src.Stride;
strides[1] = src.UvStride;
strides[2] = src.UvStride;
int i;
for (i = 0; i < Constants.MaxMbPlane; ++i)
{
ref MacroBlockDPlane pd = ref planes[i];
SetupPredPlanes(ref pd.Dst, buffers[i], strides[i], miRow, miCol, Ptr<ScaleFactors>.Null, pd.SubsamplingX, pd.SubsamplingY);
}
}
public static void SetupPrePlanes(
ref MacroBlockD xd,
int idx,
ref Surface src,
int miRow,
int miCol,
Ptr<ScaleFactors> sf)
{
if (!src.YBuffer.IsNull && !src.UBuffer.IsNull && !src.VBuffer.IsNull)
{
Span<ArrayPtr<byte>> buffers = stackalloc ArrayPtr<byte>[Constants.MaxMbPlane];
buffers[0] = src.YBuffer;
buffers[1] = src.UBuffer;
buffers[2] = src.VBuffer;
Span<int> strides = stackalloc int[Constants.MaxMbPlane];
strides[0] = src.Stride;
strides[1] = src.UvStride;
strides[2] = src.UvStride;
int i;
for (i = 0; i < Constants.MaxMbPlane; ++i)
{
ref MacroBlockDPlane pd = ref xd.Plane[i];
SetupPredPlanes(ref pd.Pre[idx], buffers[i], strides[i], miRow, miCol, sf, pd.SubsamplingX, pd.SubsamplingY);
}
}
}
}
}
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