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 static Span <uint> GetTxCounts(ref Vp9BackwardUpdates counts, TxSize maxTxSize, int ctx)
{
switch (maxTxSize)
{
case TxSize.Tx8x8: return(counts.Tx8x8[ctx].ToSpan());
case TxSize.Tx16x16: return(counts.Tx16x16[ctx].ToSpan());
case TxSize.Tx32x32: return(counts.Tx32x32[ctx].ToSpan());
default: Debug.Assert(false, "Invalid maxTxSize."); return(Span <uint> .Empty);
}
}
public BackwardUpdates(ref Vp9BackwardUpdates counts)
{
InterModeCounts = new Array7 <Array3 <Array2 <uint> > >();
for (int i = 0; i < 7; i++)
{
InterModeCounts[i][0][0] = counts.InterMode[i][2];
InterModeCounts[i][0][1] = counts.InterMode[i][0] + counts.InterMode[i][1] + counts.InterMode[i][3];
InterModeCounts[i][1][0] = counts.InterMode[i][0];
InterModeCounts[i][1][1] = counts.InterMode[i][1] + counts.InterMode[i][3];
InterModeCounts[i][2][0] = counts.InterMode[i][1];
InterModeCounts[i][2][1] = counts.InterMode[i][3];
}
YModeCounts = counts.YMode;
UvModeCounts = counts.UvMode;
PartitionCounts = counts.Partition;
SwitchableInterpsCount = counts.SwitchableInterp;
IntraInterCount = counts.IntraInter;
CompInterCount = counts.CompInter;
SingleRefCount = counts.SingleRef;
CompRefCount = counts.CompRef;
Tx32x32 = counts.Tx32x32;
Tx16x16 = counts.Tx16x16;
Tx8x8 = counts.Tx8x8;
MbSkipCount = counts.Skip;
Joints = counts.Joints;
Sign = counts.Sign;
Classes = counts.Classes;
Class0 = counts.Class0;
Bits = counts.Bits;
Class0Fp = counts.Class0Fp;
Fp = counts.Fp;
Class0Hp = counts.Class0Hp;
Hp = counts.Hp;
CoefCounts = counts.Coef;
EobCounts = counts.EobBranch;
}
private static void WriteBackwardUpdates(MemoryManager gmm, uint offset, ref Vp9BackwardUpdates counts)
{
using var backwardUpdatesRegion = gmm.GetWritableRegion(ExtendOffset(offset), Unsafe.SizeOf <BackwardUpdates>());
ref var backwardUpdates = ref MemoryMarshal.Cast <byte, BackwardUpdates>(backwardUpdatesRegion.Memory.Span)[0];