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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);
}
}
}
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