0
0
Fork 0
This repository has been archived on 2024-10-12. You can view files and clone it, but cannot push or open issues or pull requests.
ryujinx-final/Ryujinx.Graphics.Nvdec.Vp9/Dsp/IntraPred.cs

1380 lines
50 KiB
C#
Raw Normal View History

using Ryujinx.Graphics.Nvdec.Vp9.Common;
namespace Ryujinx.Graphics.Nvdec.Vp9.Dsp
{
internal static class IntraPred
{
private static unsafe ref byte Dst(byte* dst, int stride, int x, int y)
{
return ref dst[x + y * stride];
}
private static unsafe ref ushort Dst(ushort* dst, int stride, int x, int y)
{
return ref dst[x + y * stride];
}
private static byte Avg3(byte a, byte b, byte c)
{
return (byte)((a + 2 * b + c + 2) >> 2);
}
private static ushort Avg3(ushort a, ushort b, ushort c)
{
return (ushort)((a + 2 * b + c + 2) >> 2);
}
private static byte Avg2(byte a, byte b)
{
return (byte)((a + b + 1) >> 1);
}
private static ushort Avg2(ushort a, ushort b)
{
return (ushort)((a + b + 1) >> 1);
}
public static unsafe void D207Predictor8x8(byte* dst, int stride, byte* above, byte* left)
{
D207Predictor(dst, stride, 8, above, left);
}
public static unsafe void D207Predictor16x16(byte* dst, int stride, byte* above, byte* left)
{
D207Predictor(dst, stride, 16, above, left);
}
public static unsafe void D207Predictor32x32(byte* dst, int stride, byte* above, byte* left)
{
D207Predictor(dst, stride, 32, above, left);
}
private static unsafe void D207Predictor(byte* dst, int stride, int bs, byte* above, byte* left)
{
int r, c;
// First column
for (r = 0; r < bs - 1; ++r)
{
dst[r * stride] = Avg2(left[r], left[r + 1]);
}
dst[(bs - 1) * stride] = left[bs - 1];
dst++;
// Second column
for (r = 0; r < bs - 2; ++r)
{
dst[r * stride] = Avg3(left[r], left[r + 1], left[r + 2]);
}
dst[(bs - 2) * stride] = Avg3(left[bs - 2], left[bs - 1], left[bs - 1]);
dst[(bs - 1) * stride] = left[bs - 1];
dst++;
// Rest of last row
for (c = 0; c < bs - 2; ++c)
{
dst[(bs - 1) * stride + c] = left[bs - 1];
}
for (r = bs - 2; r >= 0; --r)
{
for (c = 0; c < bs - 2; ++c)
{
dst[r * stride + c] = dst[(r + 1) * stride + c - 2];
}
}
}
public static unsafe void D63Predictor8x8(byte* dst, int stride, byte* above, byte* left)
{
D63Predictor(dst, stride, 8, above, left);
}
public static unsafe void D63Predictor16x16(byte* dst, int stride, byte* above, byte* left)
{
D63Predictor(dst, stride, 16, above, left);
}
public static unsafe void D63Predictor32x32(byte* dst, int stride, byte* above, byte* left)
{
D63Predictor(dst, stride, 32, above, left);
}
private static unsafe void D63Predictor(byte* dst, int stride, int bs, byte* above, byte* left)
{
int r, c;
int size;
for (c = 0; c < bs; ++c)
{
dst[c] = Avg2(above[c], above[c + 1]);
dst[stride + c] = Avg3(above[c], above[c + 1], above[c + 2]);
}
for (r = 2, size = bs - 2; r < bs; r += 2, --size)
{
MemoryUtil.Copy(dst + (r + 0) * stride, dst + (r >> 1), size);
MemoryUtil.Fill(dst + (r + 0) * stride + size, above[bs - 1], bs - size);
MemoryUtil.Copy(dst + (r + 1) * stride, dst + stride + (r >> 1), size);
MemoryUtil.Fill(dst + (r + 1) * stride + size, above[bs - 1], bs - size);
}
}
public static unsafe void D45Predictor8x8(byte* dst, int stride, byte* above, byte* left)
{
D45Predictor(dst, stride, 8, above, left);
}
public static unsafe void D45Predictor16x16(byte* dst, int stride, byte* above, byte* left)
{
D45Predictor(dst, stride, 16, above, left);
}
public static unsafe void D45Predictor32x32(byte* dst, int stride, byte* above, byte* left)
{
D45Predictor(dst, stride, 32, above, left);
}
private static unsafe void D45Predictor(byte* dst, int stride, int bs, byte* above, byte* left)
{
byte aboveRight = above[bs - 1];
byte* dstRow0 = dst;
int x, size;
for (x = 0; x < bs - 1; ++x)
{
dst[x] = Avg3(above[x], above[x + 1], above[x + 2]);
}
dst[bs - 1] = aboveRight;
dst += stride;
for (x = 1, size = bs - 2; x < bs; ++x, --size)
{
MemoryUtil.Copy(dst, dstRow0 + x, size);
MemoryUtil.Fill(dst + size, aboveRight, x + 1);
dst += stride;
}
}
public static unsafe void D117Predictor8x8(byte* dst, int stride, byte* above, byte* left)
{
D117Predictor(dst, stride, 8, above, left);
}
public static unsafe void D117Predictor16x16(byte* dst, int stride, byte* above, byte* left)
{
D117Predictor(dst, stride, 16, above, left);
}
public static unsafe void D117Predictor32x32(byte* dst, int stride, byte* above, byte* left)
{
D117Predictor(dst, stride, 32, above, left);
}
private static unsafe void D117Predictor(byte* dst, int stride, int bs, byte* above, byte* left)
{
int r, c;
// First row
for (c = 0; c < bs; c++)
{
dst[c] = Avg2(above[c - 1], above[c]);
}
dst += stride;
// Second row
dst[0] = Avg3(left[0], above[-1], above[0]);
for (c = 1; c < bs; c++)
{
dst[c] = Avg3(above[c - 2], above[c - 1], above[c]);
}
dst += stride;
// The rest of first col
dst[0] = Avg3(above[-1], left[0], left[1]);
for (r = 3; r < bs; ++r)
{
dst[(r - 2) * stride] = Avg3(left[r - 3], left[r - 2], left[r - 1]);
}
// The rest of the block
for (r = 2; r < bs; ++r)
{
for (c = 1; c < bs; c++)
{
dst[c] = dst[-2 * stride + c - 1];
}
dst += stride;
}
}
public static unsafe void D135Predictor8x8(byte* dst, int stride, byte* above, byte* left)
{
D135Predictor(dst, stride, 8, above, left);
}
public static unsafe void D135Predictor16x16(byte* dst, int stride, byte* above, byte* left)
{
D135Predictor(dst, stride, 16, above, left);
}
public static unsafe void D135Predictor32x32(byte* dst, int stride, byte* above, byte* left)
{
D135Predictor(dst, stride, 32, above, left);
}
private static unsafe void D135Predictor(byte* dst, int stride, int bs, byte* above, byte* left)
{
int i;
byte* border = stackalloc byte[32 + 32 - 1]; // outer border from bottom-left to top-right
// Dst(dst, stride, bs, bs - 2)[0], i.e., border starting at bottom-left
for (i = 0; i < bs - 2; ++i)
{
border[i] = Avg3(left[bs - 3 - i], left[bs - 2 - i], left[bs - 1 - i]);
}
border[bs - 2] = Avg3(above[-1], left[0], left[1]);
border[bs - 1] = Avg3(left[0], above[-1], above[0]);
border[bs - 0] = Avg3(above[-1], above[0], above[1]);
// dst[0][2, size), i.e., remaining top border ascending
for (i = 0; i < bs - 2; ++i)
{
border[bs + 1 + i] = Avg3(above[i], above[i + 1], above[i + 2]);
}
for (i = 0; i < bs; ++i)
{
MemoryUtil.Copy(dst + i * stride, border + bs - 1 - i, bs);
}
}
public static unsafe void D153Predictor8x8(byte* dst, int stride, byte* above, byte* left)
{
D153Predictor(dst, stride, 8, above, left);
}
public static unsafe void D153Predictor16x16(byte* dst, int stride, byte* above, byte* left)
{
D153Predictor(dst, stride, 16, above, left);
}
public static unsafe void D153Predictor32x32(byte* dst, int stride, byte* above, byte* left)
{
D153Predictor(dst, stride, 32, above, left);
}
private static unsafe void D153Predictor(byte* dst, int stride, int bs, byte* above, byte* left)
{
int r, c;
dst[0] = Avg2(above[-1], left[0]);
for (r = 1; r < bs; r++)
{
dst[r * stride] = Avg2(left[r - 1], left[r]);
}
dst++;
dst[0] = Avg3(left[0], above[-1], above[0]);
dst[stride] = Avg3(above[-1], left[0], left[1]);
for (r = 2; r < bs; r++)
{
dst[r * stride] = Avg3(left[r - 2], left[r - 1], left[r]);
}
dst++;
for (c = 0; c < bs - 2; c++)
{
dst[c] = Avg3(above[c - 1], above[c], above[c + 1]);
}
dst += stride;
for (r = 1; r < bs; ++r)
{
for (c = 0; c < bs - 2; c++)
{
dst[c] = dst[-stride + c - 2];
}
dst += stride;
}
}
public static unsafe void VPredictor4x4(byte* dst, int stride, byte* above, byte* left)
{
VPredictor(dst, stride, 4, above, left);
}
public static unsafe void VPredictor8x8(byte* dst, int stride, byte* above, byte* left)
{
VPredictor(dst, stride, 8, above, left);
}
public static unsafe void VPredictor16x16(byte* dst, int stride, byte* above, byte* left)
{
VPredictor(dst, stride, 16, above, left);
}
public static unsafe void VPredictor32x32(byte* dst, int stride, byte* above, byte* left)
{
VPredictor(dst, stride, 32, above, left);
}
private static unsafe void VPredictor(byte* dst, int stride, int bs, byte* above, byte* left)
{
int r;
for (r = 0; r < bs; r++)
{
MemoryUtil.Copy(dst, above, bs);
dst += stride;
}
}
public static unsafe void HPredictor4x4(byte* dst, int stride, byte* above, byte* left)
{
HPredictor(dst, stride, 4, above, left);
}
public static unsafe void HPredictor8x8(byte* dst, int stride, byte* above, byte* left)
{
HPredictor(dst, stride, 8, above, left);
}
public static unsafe void HPredictor16x16(byte* dst, int stride, byte* above, byte* left)
{
HPredictor(dst, stride, 16, above, left);
}
public static unsafe void HPredictor32x32(byte* dst, int stride, byte* above, byte* left)
{
HPredictor(dst, stride, 32, above, left);
}
private static unsafe void HPredictor(byte* dst, int stride, int bs, byte* above, byte* left)
{
int r;
for (r = 0; r < bs; r++)
{
MemoryUtil.Fill(dst, left[r], bs);
dst += stride;
}
}
public static unsafe void TMPredictor4x4(byte* dst, int stride, byte* above, byte* left)
{
TMPredictor(dst, stride, 4, above, left);
}
public static unsafe void TMPredictor8x8(byte* dst, int stride, byte* above, byte* left)
{
TMPredictor(dst, stride, 8, above, left);
}
public static unsafe void TMPredictor16x16(byte* dst, int stride, byte* above, byte* left)
{
TMPredictor(dst, stride, 16, above, left);
}
public static unsafe void TMPredictor32x32(byte* dst, int stride, byte* above, byte* left)
{
TMPredictor(dst, stride, 32, above, left);
}
private static unsafe void TMPredictor(byte* dst, int stride, int bs, byte* above, byte* left)
{
int r, c;
int yTopLeft = above[-1];
for (r = 0; r < bs; r++)
{
for (c = 0; c < bs; c++)
{
dst[c] = BitUtils.ClipPixel(left[r] + above[c] - yTopLeft);
}
dst += stride;
}
}
public static unsafe void Dc128Predictor4x4(byte* dst, int stride, byte* above, byte* left)
{
Dc128Predictor(dst, stride, 4, above, left);
}
public static unsafe void Dc128Predictor8x8(byte* dst, int stride, byte* above, byte* left)
{
Dc128Predictor(dst, stride, 8, above, left);
}
public static unsafe void Dc128Predictor16x16(byte* dst, int stride, byte* above, byte* left)
{
Dc128Predictor(dst, stride, 16, above, left);
}
public static unsafe void Dc128Predictor32x32(byte* dst, int stride, byte* above, byte* left)
{
Dc128Predictor(dst, stride, 32, above, left);
}
private static unsafe void Dc128Predictor(byte* dst, int stride, int bs, byte* above, byte* left)
{
int r;
for (r = 0; r < bs; r++)
{
MemoryUtil.Fill(dst, (byte)128, bs);
dst += stride;
}
}
public static unsafe void DcLeftPredictor4x4(byte* dst, int stride, byte* above, byte* left)
{
DcLeftPredictor(dst, stride, 4, above, left);
}
public static unsafe void DcLeftPredictor8x8(byte* dst, int stride, byte* above, byte* left)
{
DcLeftPredictor(dst, stride, 8, above, left);
}
public static unsafe void DcLeftPredictor16x16(byte* dst, int stride, byte* above, byte* left)
{
DcLeftPredictor(dst, stride, 16, above, left);
}
public static unsafe void DcLeftPredictor32x32(byte* dst, int stride, byte* above, byte* left)
{
DcLeftPredictor(dst, stride, 32, above, left);
}
private static unsafe void DcLeftPredictor(byte* dst, int stride, int bs, byte* above, byte* left)
{
int i, r, expectedDc, sum = 0;
for (i = 0; i < bs; i++)
{
sum += left[i];
}
expectedDc = (sum + (bs >> 1)) / bs;
for (r = 0; r < bs; r++)
{
MemoryUtil.Fill(dst, (byte)expectedDc, bs);
dst += stride;
}
}
public static unsafe void DcTopPredictor4x4(byte* dst, int stride, byte* above, byte* left)
{
DcTopPredictor(dst, stride, 4, above, left);
}
public static unsafe void DcTopPredictor8x8(byte* dst, int stride, byte* above, byte* left)
{
DcTopPredictor(dst, stride, 8, above, left);
}
public static unsafe void DcTopPredictor16x16(byte* dst, int stride, byte* above, byte* left)
{
DcTopPredictor(dst, stride, 16, above, left);
}
public static unsafe void DcTopPredictor32x32(byte* dst, int stride, byte* above, byte* left)
{
DcTopPredictor(dst, stride, 32, above, left);
}
private static unsafe void DcTopPredictor(byte* dst, int stride, int bs, byte* above, byte* left)
{
int i, r, expectedDc, sum = 0;
for (i = 0; i < bs; i++)
{
sum += above[i];
}
expectedDc = (sum + (bs >> 1)) / bs;
for (r = 0; r < bs; r++)
{
MemoryUtil.Fill(dst, (byte)expectedDc, bs);
dst += stride;
}
}
public static unsafe void DcPredictor4x4(byte* dst, int stride, byte* above, byte* left)
{
DcPredictor(dst, stride, 4, above, left);
}
public static unsafe void DcPredictor8x8(byte* dst, int stride, byte* above, byte* left)
{
DcPredictor(dst, stride, 8, above, left);
}
public static unsafe void DcPredictor16x16(byte* dst, int stride, byte* above, byte* left)
{
DcPredictor(dst, stride, 16, above, left);
}
public static unsafe void DcPredictor32x32(byte* dst, int stride, byte* above, byte* left)
{
DcPredictor(dst, stride, 32, above, left);
}
private static unsafe void DcPredictor(byte* dst, int stride, int bs, byte* above, byte* left)
{
int i, r, expectedDc, sum = 0;
int count = 2 * bs;
for (i = 0; i < bs; i++)
{
sum += above[i];
sum += left[i];
}
expectedDc = (sum + (count >> 1)) / count;
for (r = 0; r < bs; r++)
{
MemoryUtil.Fill(dst, (byte)expectedDc, bs);
dst += stride;
}
}
public static unsafe void HePredictor4x4(byte* dst, int stride, byte* above, byte* left)
{
byte h = above[-1];
byte I = left[0];
byte j = left[1];
byte k = left[2];
byte l = left[3];
MemoryUtil.Fill(dst + stride * 0, Avg3(h, I, j), 4);
MemoryUtil.Fill(dst + stride * 1, Avg3(I, j, k), 4);
MemoryUtil.Fill(dst + stride * 2, Avg3(j, k, l), 4);
MemoryUtil.Fill(dst + stride * 3, Avg3(k, l, l), 4);
}
public static unsafe void VePredictor4x4(byte* dst, int stride, byte* above, byte* left)
{
byte h = above[-1];
byte I = above[0];
byte j = above[1];
byte k = above[2];
byte l = above[3];
byte m = above[4];
dst[0] = Avg3(h, I, j);
dst[1] = Avg3(I, j, k);
dst[2] = Avg3(j, k, l);
dst[3] = Avg3(k, l, m);
MemoryUtil.Copy(dst + stride * 1, dst, 4);
MemoryUtil.Copy(dst + stride * 2, dst, 4);
MemoryUtil.Copy(dst + stride * 3, dst, 4);
}
public static unsafe void D207Predictor4x4(byte* dst, int stride, byte* above, byte* left)
{
byte I = left[0];
byte j = left[1];
byte k = left[2];
byte l = left[3];
Dst(dst, stride, 0, 0) = Avg2(I, j);
Dst(dst, stride, 2, 0) = Dst(dst, stride, 0, 1) = Avg2(j, k);
Dst(dst, stride, 2, 1) = Dst(dst, stride, 0, 2) = Avg2(k, l);
Dst(dst, stride, 1, 0) = Avg3(I, j, k);
Dst(dst, stride, 3, 0) = Dst(dst, stride, 1, 1) = Avg3(j, k, l);
Dst(dst, stride, 3, 1) = Dst(dst, stride, 1, 2) = Avg3(k, l, l);
Dst(dst, stride, 3, 2) = Dst(dst, stride, 2, 2) = Dst(dst, stride, 0, 3) = Dst(dst, stride, 1, 3) = Dst(dst, stride, 2, 3) = Dst(dst, stride, 3, 3) = l;
}
public static unsafe void D63Predictor4x4(byte* dst, int stride, byte* above, byte* left)
{
byte a = above[0];
byte b = above[1];
byte c = above[2];
byte d = above[3];
byte e = above[4];
byte f = above[5];
byte g = above[6];
Dst(dst, stride, 0, 0) = Avg2(a, b);
Dst(dst, stride, 1, 0) = Dst(dst, stride, 0, 2) = Avg2(b, c);
Dst(dst, stride, 2, 0) = Dst(dst, stride, 1, 2) = Avg2(c, d);
Dst(dst, stride, 3, 0) = Dst(dst, stride, 2, 2) = Avg2(d, e);
Dst(dst, stride, 3, 2) = Avg2(e, f); // Differs from vp8
Dst(dst, stride, 0, 1) = Avg3(a, b, c);
Dst(dst, stride, 1, 1) = Dst(dst, stride, 0, 3) = Avg3(b, c, d);
Dst(dst, stride, 2, 1) = Dst(dst, stride, 1, 3) = Avg3(c, d, e);
Dst(dst, stride, 3, 1) = Dst(dst, stride, 2, 3) = Avg3(d, e, f);
Dst(dst, stride, 3, 3) = Avg3(e, f, g); // Differs from vp8
}
public static unsafe void D63ePredictor4x4(byte* dst, int stride, byte* above, byte* left)
{
byte a = above[0];
byte b = above[1];
byte c = above[2];
byte d = above[3];
byte e = above[4];
byte f = above[5];
byte g = above[6];
byte h = above[7];
Dst(dst, stride, 0, 0) = Avg2(a, b);
Dst(dst, stride, 1, 0) = Dst(dst, stride, 0, 2) = Avg2(b, c);
Dst(dst, stride, 2, 0) = Dst(dst, stride, 1, 2) = Avg2(c, d);
Dst(dst, stride, 3, 0) = Dst(dst, stride, 2, 2) = Avg2(d, e);
Dst(dst, stride, 3, 2) = Avg3(e, f, g);
Dst(dst, stride, 0, 1) = Avg3(a, b, c);
Dst(dst, stride, 1, 1) = Dst(dst, stride, 0, 3) = Avg3(b, c, d);
Dst(dst, stride, 2, 1) = Dst(dst, stride, 1, 3) = Avg3(c, d, e);
Dst(dst, stride, 3, 1) = Dst(dst, stride, 2, 3) = Avg3(d, e, f);
Dst(dst, stride, 3, 3) = Avg3(f, g, h);
}
public static unsafe void D45Predictor4x4(byte* dst, int stride, byte* above, byte* left)
{
byte a = above[0];
byte b = above[1];
byte c = above[2];
byte d = above[3];
byte e = above[4];
byte f = above[5];
byte g = above[6];
byte h = above[7];
Dst(dst, stride, 0, 0) = Avg3(a, b, c);
Dst(dst, stride, 1, 0) = Dst(dst, stride, 0, 1) = Avg3(b, c, d);
Dst(dst, stride, 2, 0) = Dst(dst, stride, 1, 1) = Dst(dst, stride, 0, 2) = Avg3(c, d, e);
Dst(dst, stride, 3, 0) = Dst(dst, stride, 2, 1) = Dst(dst, stride, 1, 2) = Dst(dst, stride, 0, 3) = Avg3(d, e, f);
Dst(dst, stride, 3, 1) = Dst(dst, stride, 2, 2) = Dst(dst, stride, 1, 3) = Avg3(e, f, g);
Dst(dst, stride, 3, 2) = Dst(dst, stride, 2, 3) = Avg3(f, g, h);
Dst(dst, stride, 3, 3) = h; // differs from vp8
}
public static unsafe void D45ePredictor4x4(byte* dst, int stride, byte* above, byte* left)
{
byte a = above[0];
byte b = above[1];
byte c = above[2];
byte d = above[3];
byte e = above[4];
byte f = above[5];
byte g = above[6];
byte h = above[7];
Dst(dst, stride, 0, 0) = Avg3(a, b, c);
Dst(dst, stride, 1, 0) = Dst(dst, stride, 0, 1) = Avg3(b, c, d);
Dst(dst, stride, 2, 0) = Dst(dst, stride, 1, 1) = Dst(dst, stride, 0, 2) = Avg3(c, d, e);
Dst(dst, stride, 3, 0) = Dst(dst, stride, 2, 1) = Dst(dst, stride, 1, 2) = Dst(dst, stride, 0, 3) = Avg3(d, e, f);
Dst(dst, stride, 3, 1) = Dst(dst, stride, 2, 2) = Dst(dst, stride, 1, 3) = Avg3(e, f, g);
Dst(dst, stride, 3, 2) = Dst(dst, stride, 2, 3) = Avg3(f, g, h);
Dst(dst, stride, 3, 3) = Avg3(g, h, h);
}
public static unsafe void D117Predictor4x4(byte* dst, int stride, byte* above, byte* left)
{
byte I = left[0];
byte j = left[1];
byte k = left[2];
byte x = above[-1];
byte a = above[0];
byte b = above[1];
byte c = above[2];
byte d = above[3];
Dst(dst, stride, 0, 0) = Dst(dst, stride, 1, 2) = Avg2(x, a);
Dst(dst, stride, 1, 0) = Dst(dst, stride, 2, 2) = Avg2(a, b);
Dst(dst, stride, 2, 0) = Dst(dst, stride, 3, 2) = Avg2(b, c);
Dst(dst, stride, 3, 0) = Avg2(c, d);
Dst(dst, stride, 0, 3) = Avg3(k, j, I);
Dst(dst, stride, 0, 2) = Avg3(j, I, x);
Dst(dst, stride, 0, 1) = Dst(dst, stride, 1, 3) = Avg3(I, x, a);
Dst(dst, stride, 1, 1) = Dst(dst, stride, 2, 3) = Avg3(x, a, b);
Dst(dst, stride, 2, 1) = Dst(dst, stride, 3, 3) = Avg3(a, b, c);
Dst(dst, stride, 3, 1) = Avg3(b, c, d);
}
public static unsafe void D135Predictor4x4(byte* dst, int stride, byte* above, byte* left)
{
byte I = left[0];
byte j = left[1];
byte k = left[2];
byte l = left[3];
byte x = above[-1];
byte a = above[0];
byte b = above[1];
byte c = above[2];
byte d = above[3];
Dst(dst, stride, 0, 3) = Avg3(j, k, l);
Dst(dst, stride, 1, 3) = Dst(dst, stride, 0, 2) = Avg3(I, j, k);
Dst(dst, stride, 2, 3) = Dst(dst, stride, 1, 2) = Dst(dst, stride, 0, 1) = Avg3(x, I, j);
Dst(dst, stride, 3, 3) = Dst(dst, stride, 2, 2) = Dst(dst, stride, 1, 1) = Dst(dst, stride, 0, 0) = Avg3(a, x, I);
Dst(dst, stride, 3, 2) = Dst(dst, stride, 2, 1) = Dst(dst, stride, 1, 0) = Avg3(b, a, x);
Dst(dst, stride, 3, 1) = Dst(dst, stride, 2, 0) = Avg3(c, b, a);
Dst(dst, stride, 3, 0) = Avg3(d, c, b);
}
public static unsafe void D153Predictor4x4(byte* dst, int stride, byte* above, byte* left)
{
byte I = left[0];
byte j = left[1];
byte k = left[2];
byte l = left[3];
byte x = above[-1];
byte a = above[0];
byte b = above[1];
byte c = above[2];
Dst(dst, stride, 0, 0) = Dst(dst, stride, 2, 1) = Avg2(I, x);
Dst(dst, stride, 0, 1) = Dst(dst, stride, 2, 2) = Avg2(j, I);
Dst(dst, stride, 0, 2) = Dst(dst, stride, 2, 3) = Avg2(k, j);
Dst(dst, stride, 0, 3) = Avg2(l, k);
Dst(dst, stride, 3, 0) = Avg3(a, b, c);
Dst(dst, stride, 2, 0) = Avg3(x, a, b);
Dst(dst, stride, 1, 0) = Dst(dst, stride, 3, 1) = Avg3(I, x, a);
Dst(dst, stride, 1, 1) = Dst(dst, stride, 3, 2) = Avg3(j, I, x);
Dst(dst, stride, 1, 2) = Dst(dst, stride, 3, 3) = Avg3(k, j, I);
Dst(dst, stride, 1, 3) = Avg3(l, k, j);
}
public static unsafe void HighbdD207Predictor8x8(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD207Predictor(dst, stride, 8, above, left, bd);
}
public static unsafe void HighbdD207Predictor16x16(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD207Predictor(dst, stride, 16, above, left, bd);
}
public static unsafe void HighbdD207Predictor32x32(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD207Predictor(dst, stride, 32, above, left, bd);
}
private static unsafe void HighbdD207Predictor(ushort* dst, int stride, int bs, ushort* above, ushort* left, int bd)
{
int r, c;
// First column.
for (r = 0; r < bs - 1; ++r)
{
dst[r * stride] = Avg2(left[r], left[r + 1]);
}
dst[(bs - 1) * stride] = left[bs - 1];
dst++;
// Second column.
for (r = 0; r < bs - 2; ++r)
{
dst[r * stride] = Avg3(left[r], left[r + 1], left[r + 2]);
}
dst[(bs - 2) * stride] = Avg3(left[bs - 2], left[bs - 1], left[bs - 1]);
dst[(bs - 1) * stride] = left[bs - 1];
dst++;
// Rest of last row.
for (c = 0; c < bs - 2; ++c)
{
dst[(bs - 1) * stride + c] = left[bs - 1];
}
for (r = bs - 2; r >= 0; --r)
{
for (c = 0; c < bs - 2; ++c)
{
dst[r * stride + c] = dst[(r + 1) * stride + c - 2];
}
}
}
public static unsafe void HighbdD63Predictor8x8(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD63Predictor(dst, stride, 8, above, left, bd);
}
public static unsafe void HighbdD63Predictor16x16(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD63Predictor(dst, stride, 16, above, left, bd);
}
public static unsafe void HighbdD63Predictor32x32(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD63Predictor(dst, stride, 32, above, left, bd);
}
private static unsafe void HighbdD63Predictor(ushort* dst, int stride, int bs, ushort* above, ushort* left, int bd)
{
int r, c;
int size;
for (c = 0; c < bs; ++c)
{
dst[c] = Avg2(above[c], above[c + 1]);
dst[stride + c] = Avg3(above[c], above[c + 1], above[c + 2]);
}
for (r = 2, size = bs - 2; r < bs; r += 2, --size)
{
MemoryUtil.Copy(dst + (r + 0) * stride, dst + (r >> 1), size);
MemoryUtil.Fill(dst + (r + 0) * stride + size, above[bs - 1], bs - size);
MemoryUtil.Copy(dst + (r + 1) * stride, dst + stride + (r >> 1), size);
MemoryUtil.Fill(dst + (r + 1) * stride + size, above[bs - 1], bs - size);
}
}
public static unsafe void HighbdD45Predictor8x8(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD45Predictor(dst, stride, 8, above, left, bd);
}
public static unsafe void HighbdD45Predictor16x16(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD45Predictor(dst, stride, 16, above, left, bd);
}
public static unsafe void HighbdD45Predictor32x32(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD45Predictor(dst, stride, 32, above, left, bd);
}
private static unsafe void HighbdD45Predictor(ushort* dst, int stride, int bs, ushort* above, ushort* left, int bd)
{
ushort aboveRight = above[bs - 1];
ushort* dstRow0 = dst;
int x, size;
for (x = 0; x < bs - 1; ++x)
{
dst[x] = Avg3(above[x], above[x + 1], above[x + 2]);
}
dst[bs - 1] = aboveRight;
dst += stride;
for (x = 1, size = bs - 2; x < bs; ++x, --size)
{
MemoryUtil.Copy(dst, dstRow0 + x, size);
MemoryUtil.Fill(dst + size, aboveRight, x + 1);
dst += stride;
}
}
public static unsafe void HighbdD117Predictor8x8(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD117Predictor(dst, stride, 8, above, left, bd);
}
public static unsafe void HighbdD117Predictor16x16(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD117Predictor(dst, stride, 16, above, left, bd);
}
public static unsafe void HighbdD117Predictor32x32(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD117Predictor(dst, stride, 32, above, left, bd);
}
private static unsafe void HighbdD117Predictor(ushort* dst, int stride, int bs, ushort* above, ushort* left, int bd)
{
int r, c;
// First row
for (c = 0; c < bs; c++)
{
dst[c] = Avg2(above[c - 1], above[c]);
}
dst += stride;
// Second row
dst[0] = Avg3(left[0], above[-1], above[0]);
for (c = 1; c < bs; c++)
{
dst[c] = Avg3(above[c - 2], above[c - 1], above[c]);
}
dst += stride;
// The rest of first col
dst[0] = Avg3(above[-1], left[0], left[1]);
for (r = 3; r < bs; ++r)
{
dst[(r - 2) * stride] = Avg3(left[r - 3], left[r - 2], left[r - 1]);
}
// The rest of the block
for (r = 2; r < bs; ++r)
{
for (c = 1; c < bs; c++)
{
dst[c] = dst[-2 * stride + c - 1];
}
dst += stride;
}
}
public static unsafe void HighbdD135Predictor8x8(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD135Predictor(dst, stride, 8, above, left, bd);
}
public static unsafe void HighbdD135Predictor16x16(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD135Predictor(dst, stride, 16, above, left, bd);
}
public static unsafe void HighbdD135Predictor32x32(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD135Predictor(dst, stride, 32, above, left, bd);
}
private static unsafe void HighbdD135Predictor(ushort* dst, int stride, int bs, ushort* above, ushort* left, int bd)
{
int i;
ushort* border = stackalloc ushort[32 + 32 - 1]; // Outer border from bottom-left to top-right
// Dst(dst, stride, bs, bs - 2)[0], i.e., border starting at bottom-left
for (i = 0; i < bs - 2; ++i)
{
border[i] = Avg3(left[bs - 3 - i], left[bs - 2 - i], left[bs - 1 - i]);
}
border[bs - 2] = Avg3(above[-1], left[0], left[1]);
border[bs - 1] = Avg3(left[0], above[-1], above[0]);
border[bs - 0] = Avg3(above[-1], above[0], above[1]);
// dst[0][2, size), i.e., remaining top border ascending
for (i = 0; i < bs - 2; ++i)
{
border[bs + 1 + i] = Avg3(above[i], above[i + 1], above[i + 2]);
}
for (i = 0; i < bs; ++i)
{
MemoryUtil.Copy(dst + i * stride, border + bs - 1 - i, bs);
}
}
public static unsafe void HighbdD153Predictor8x8(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD153Predictor(dst, stride, 8, above, left, bd);
}
public static unsafe void HighbdD153Predictor16x16(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD153Predictor(dst, stride, 16, above, left, bd);
}
public static unsafe void HighbdD153Predictor32x32(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdD153Predictor(dst, stride, 32, above, left, bd);
}
private static unsafe void HighbdD153Predictor(ushort* dst, int stride, int bs, ushort* above, ushort* left, int bd)
{
int r, c;
dst[0] = Avg2(above[-1], left[0]);
for (r = 1; r < bs; r++)
{
dst[r * stride] = Avg2(left[r - 1], left[r]);
}
dst++;
dst[0] = Avg3(left[0], above[-1], above[0]);
dst[stride] = Avg3(above[-1], left[0], left[1]);
for (r = 2; r < bs; r++)
{
dst[r * stride] = Avg3(left[r - 2], left[r - 1], left[r]);
}
dst++;
for (c = 0; c < bs - 2; c++)
{
dst[c] = Avg3(above[c - 1], above[c], above[c + 1]);
}
dst += stride;
for (r = 1; r < bs; ++r)
{
for (c = 0; c < bs - 2; c++)
{
dst[c] = dst[-stride + c - 2];
}
dst += stride;
}
}
public static unsafe void HighbdVPredictor4x4(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdVPredictor(dst, stride, 4, above, left, bd);
}
public static unsafe void HighbdVPredictor8x8(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdVPredictor(dst, stride, 8, above, left, bd);
}
public static unsafe void HighbdVPredictor16x16(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdVPredictor(dst, stride, 16, above, left, bd);
}
public static unsafe void HighbdVPredictor32x32(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdVPredictor(dst, stride, 32, above, left, bd);
}
private static unsafe void HighbdVPredictor(ushort* dst, int stride, int bs, ushort* above, ushort* left, int bd)
{
int r;
for (r = 0; r < bs; r++)
{
MemoryUtil.Copy(dst, above, bs);
dst += stride;
}
}
public static unsafe void HighbdHPredictor4x4(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdHPredictor(dst, stride, 4, above, left, bd);
}
public static unsafe void HighbdHPredictor8x8(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdHPredictor(dst, stride, 8, above, left, bd);
}
public static unsafe void HighbdHPredictor16x16(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdHPredictor(dst, stride, 16, above, left, bd);
}
public static unsafe void HighbdHPredictor32x32(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdHPredictor(dst, stride, 32, above, left, bd);
}
private static unsafe void HighbdHPredictor(ushort* dst, int stride, int bs, ushort* above, ushort* left, int bd)
{
int r;
for (r = 0; r < bs; r++)
{
MemoryUtil.Fill(dst, left[r], bs);
dst += stride;
}
}
public static unsafe void HighbdTMPredictor4x4(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdTMPredictor(dst, stride, 4, above, left, bd);
}
public static unsafe void HighbdTMPredictor8x8(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdTMPredictor(dst, stride, 8, above, left, bd);
}
public static unsafe void HighbdTMPredictor16x16(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdTMPredictor(dst, stride, 16, above, left, bd);
}
public static unsafe void HighbdTMPredictor32x32(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdTMPredictor(dst, stride, 32, above, left, bd);
}
private static unsafe void HighbdTMPredictor(ushort* dst, int stride, int bs, ushort* above, ushort* left, int bd)
{
int r, c;
int yTopLeft = above[-1];
for (r = 0; r < bs; r++)
{
for (c = 0; c < bs; c++)
{
dst[c] = BitUtils.ClipPixelHighbd(left[r] + above[c] - yTopLeft, bd);
}
dst += stride;
}
}
public static unsafe void HighbdDc128Predictor4x4(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdDc128Predictor(dst, stride, 4, above, left, bd);
}
public static unsafe void HighbdDc128Predictor8x8(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdDc128Predictor(dst, stride, 8, above, left, bd);
}
public static unsafe void HighbdDc128Predictor16x16(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdDc128Predictor(dst, stride, 16, above, left, bd);
}
public static unsafe void HighbdDc128Predictor32x32(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdDc128Predictor(dst, stride, 32, above, left, bd);
}
private static unsafe void HighbdDc128Predictor(ushort* dst, int stride, int bs, ushort* above, ushort* left, int bd)
{
int r;
for (r = 0; r < bs; r++)
{
MemoryUtil.Fill(dst, (ushort)(128 << (bd - 8)), bs);
dst += stride;
}
}
public static unsafe void HighbdDcLeftPredictor4x4(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdDcLeftPredictor(dst, stride, 4, above, left, bd);
}
public static unsafe void HighbdDcLeftPredictor8x8(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdDcLeftPredictor(dst, stride, 8, above, left, bd);
}
public static unsafe void HighbdDcLeftPredictor16x16(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdDcLeftPredictor(dst, stride, 16, above, left, bd);
}
public static unsafe void HighbdDcLeftPredictor32x32(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdDcLeftPredictor(dst, stride, 32, above, left, bd);
}
private static unsafe void HighbdDcLeftPredictor(ushort* dst, int stride, int bs, ushort* above, ushort* left, int bd)
{
int i, r, expectedDc, sum = 0;
for (i = 0; i < bs; i++)
{
sum += left[i];
}
expectedDc = (sum + (bs >> 1)) / bs;
for (r = 0; r < bs; r++)
{
MemoryUtil.Fill(dst, (ushort)expectedDc, bs);
dst += stride;
}
}
public static unsafe void HighbdDcTopPredictor4x4(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdDcTopPredictor(dst, stride, 4, above, left, bd);
}
public static unsafe void HighbdDcTopPredictor8x8(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdDcTopPredictor(dst, stride, 8, above, left, bd);
}
public static unsafe void HighbdDcTopPredictor16x16(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdDcTopPredictor(dst, stride, 16, above, left, bd);
}
public static unsafe void HighbdDcTopPredictor32x32(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdDcTopPredictor(dst, stride, 32, above, left, bd);
}
private static unsafe void HighbdDcTopPredictor(ushort* dst, int stride, int bs, ushort* above, ushort* left, int bd)
{
int i, r, expectedDc, sum = 0;
for (i = 0; i < bs; i++)
{
sum += above[i];
}
expectedDc = (sum + (bs >> 1)) / bs;
for (r = 0; r < bs; r++)
{
MemoryUtil.Fill(dst, (ushort)expectedDc, bs);
dst += stride;
}
}
public static unsafe void HighbdDcPredictor4x4(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdDcPredictor(dst, stride, 4, above, left, bd);
}
public static unsafe void HighbdDcPredictor8x8(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdDcPredictor(dst, stride, 8, above, left, bd);
}
public static unsafe void HighbdDcPredictor16x16(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdDcPredictor(dst, stride, 16, above, left, bd);
}
public static unsafe void HighbdDcPredictor32x32(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
HighbdDcPredictor(dst, stride, 32, above, left, bd);
}
private static unsafe void HighbdDcPredictor(ushort* dst, int stride, int bs, ushort* above, ushort* left, int bd)
{
int i, r, expectedDc, sum = 0;
int count = 2 * bs;
for (i = 0; i < bs; i++)
{
sum += above[i];
sum += left[i];
}
expectedDc = (sum + (count >> 1)) / count;
for (r = 0; r < bs; r++)
{
MemoryUtil.Fill(dst, (ushort)expectedDc, bs);
dst += stride;
}
}
public static unsafe void HighbdD207Predictor4x4(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
ushort I = left[0];
ushort j = left[1];
ushort k = left[2];
ushort l = left[3];
Dst(dst, stride, 0, 0) = Avg2(I, j);
Dst(dst, stride, 2, 0) = Dst(dst, stride, 0, 1) = Avg2(j, k);
Dst(dst, stride, 2, 1) = Dst(dst, stride, 0, 2) = Avg2(k, l);
Dst(dst, stride, 1, 0) = Avg3(I, j, k);
Dst(dst, stride, 3, 0) = Dst(dst, stride, 1, 1) = Avg3(j, k, l);
Dst(dst, stride, 3, 1) = Dst(dst, stride, 1, 2) = Avg3(k, l, l);
Dst(dst, stride, 3, 2) = Dst(dst, stride, 2, 2) = Dst(dst, stride, 0, 3) = Dst(dst, stride, 1, 3) = Dst(dst, stride, 2, 3) = Dst(dst, stride, 3, 3) = l;
}
public static unsafe void HighbdD63Predictor4x4(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
ushort a = above[0];
ushort b = above[1];
ushort c = above[2];
ushort d = above[3];
ushort e = above[4];
ushort f = above[5];
ushort g = above[6];
Dst(dst, stride, 0, 0) = Avg2(a, b);
Dst(dst, stride, 1, 0) = Dst(dst, stride, 0, 2) = Avg2(b, c);
Dst(dst, stride, 2, 0) = Dst(dst, stride, 1, 2) = Avg2(c, d);
Dst(dst, stride, 3, 0) = Dst(dst, stride, 2, 2) = Avg2(d, e);
Dst(dst, stride, 3, 2) = Avg2(e, f); // Differs from vp8
Dst(dst, stride, 0, 1) = Avg3(a, b, c);
Dst(dst, stride, 1, 1) = Dst(dst, stride, 0, 3) = Avg3(b, c, d);
Dst(dst, stride, 2, 1) = Dst(dst, stride, 1, 3) = Avg3(c, d, e);
Dst(dst, stride, 3, 1) = Dst(dst, stride, 2, 3) = Avg3(d, e, f);
Dst(dst, stride, 3, 3) = Avg3(e, f, g); // Differs from vp8
}
public static unsafe void HighbdD45Predictor4x4(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
ushort a = above[0];
ushort b = above[1];
ushort c = above[2];
ushort d = above[3];
ushort e = above[4];
ushort f = above[5];
ushort g = above[6];
ushort h = above[7];
Dst(dst, stride, 0, 0) = Avg3(a, b, c);
Dst(dst, stride, 1, 0) = Dst(dst, stride, 0, 1) = Avg3(b, c, d);
Dst(dst, stride, 2, 0) = Dst(dst, stride, 1, 1) = Dst(dst, stride, 0, 2) = Avg3(c, d, e);
Dst(dst, stride, 3, 0) = Dst(dst, stride, 2, 1) = Dst(dst, stride, 1, 2) = Dst(dst, stride, 0, 3) = Avg3(d, e, f);
Dst(dst, stride, 3, 1) = Dst(dst, stride, 2, 2) = Dst(dst, stride, 1, 3) = Avg3(e, f, g);
Dst(dst, stride, 3, 2) = Dst(dst, stride, 2, 3) = Avg3(f, g, h);
Dst(dst, stride, 3, 3) = h; // Differs from vp8
}
public static unsafe void HighbdD117Predictor4x4(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
ushort I = left[0];
ushort j = left[1];
ushort k = left[2];
ushort x = above[-1];
ushort a = above[0];
ushort b = above[1];
ushort c = above[2];
ushort d = above[3];
Dst(dst, stride, 0, 0) = Dst(dst, stride, 1, 2) = Avg2(x, a);
Dst(dst, stride, 1, 0) = Dst(dst, stride, 2, 2) = Avg2(a, b);
Dst(dst, stride, 2, 0) = Dst(dst, stride, 3, 2) = Avg2(b, c);
Dst(dst, stride, 3, 0) = Avg2(c, d);
Dst(dst, stride, 0, 3) = Avg3(k, j, I);
Dst(dst, stride, 0, 2) = Avg3(j, I, x);
Dst(dst, stride, 0, 1) = Dst(dst, stride, 1, 3) = Avg3(I, x, a);
Dst(dst, stride, 1, 1) = Dst(dst, stride, 2, 3) = Avg3(x, a, b);
Dst(dst, stride, 2, 1) = Dst(dst, stride, 3, 3) = Avg3(a, b, c);
Dst(dst, stride, 3, 1) = Avg3(b, c, d);
}
public static unsafe void HighbdD135Predictor4x4(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
ushort I = left[0];
ushort j = left[1];
ushort k = left[2];
ushort l = left[3];
ushort x = above[-1];
ushort a = above[0];
ushort b = above[1];
ushort c = above[2];
ushort d = above[3];
Dst(dst, stride, 0, 3) = Avg3(j, k, l);
Dst(dst, stride, 1, 3) = Dst(dst, stride, 0, 2) = Avg3(I, j, k);
Dst(dst, stride, 2, 3) = Dst(dst, stride, 1, 2) = Dst(dst, stride, 0, 1) = Avg3(x, I, j);
Dst(dst, stride, 3, 3) = Dst(dst, stride, 2, 2) = Dst(dst, stride, 1, 1) = Dst(dst, stride, 0, 0) = Avg3(a, x, I);
Dst(dst, stride, 3, 2) = Dst(dst, stride, 2, 1) = Dst(dst, stride, 1, 0) = Avg3(b, a, x);
Dst(dst, stride, 3, 1) = Dst(dst, stride, 2, 0) = Avg3(c, b, a);
Dst(dst, stride, 3, 0) = Avg3(d, c, b);
}
public static unsafe void HighbdD153Predictor4x4(ushort* dst, int stride, ushort* above, ushort* left, int bd)
{
ushort I = left[0];
ushort j = left[1];
ushort k = left[2];
ushort l = left[3];
ushort x = above[-1];
ushort a = above[0];
ushort b = above[1];
ushort c = above[2];
Dst(dst, stride, 0, 0) = Dst(dst, stride, 2, 1) = Avg2(I, x);
Dst(dst, stride, 0, 1) = Dst(dst, stride, 2, 2) = Avg2(j, I);
Dst(dst, stride, 0, 2) = Dst(dst, stride, 2, 3) = Avg2(k, j);
Dst(dst, stride, 0, 3) = Avg2(l, k);
Dst(dst, stride, 3, 0) = Avg3(a, b, c);
Dst(dst, stride, 2, 0) = Avg3(x, a, b);
Dst(dst, stride, 1, 0) = Dst(dst, stride, 3, 1) = Avg3(I, x, a);
Dst(dst, stride, 1, 1) = Dst(dst, stride, 3, 2) = Avg3(j, I, x);
Dst(dst, stride, 1, 2) = Dst(dst, stride, 3, 3) = Avg3(k, j, I);
Dst(dst, stride, 1, 3) = Avg3(l, k, j);
}
}
}