1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
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 readonly 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);
}
}
}
|
