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using Ryujinx.Common.Memory;
using Ryujinx.Graphics.Nvdec.Vp9.Common;
using Ryujinx.Graphics.Nvdec.Vp9.Types;
using Ryujinx.Graphics.Video;
using System;
namespace Ryujinx.Graphics.Nvdec.Vp9
{
public sealed class Decoder : IVp9Decoder
{
public bool IsHardwareAccelerated => false;
private readonly MemoryAllocator _allocator = new();
public ISurface CreateSurface(int width, int height) => new Surface(width, height);
private static ReadOnlySpan<byte> LiteralToFilter => new byte[]
{
Constants.EightTapSmooth,
Constants.EightTap,
Constants.EightTapSharp,
Constants.Bilinear,
};
public unsafe bool Decode(
ref Vp9PictureInfo pictureInfo,
ISurface output,
ReadOnlySpan<byte> bitstream,
ReadOnlySpan<Vp9MvRef> mvsIn,
Span<Vp9MvRef> mvsOut)
{
Vp9Common cm = new()
{
FrameType = pictureInfo.IsKeyFrame ? FrameType.KeyFrame : FrameType.InterFrame,
IntraOnly = pictureInfo.IntraOnly,
Width = output.Width,
Height = output.Height,
SubsamplingX = 1,
SubsamplingY = 1,
UsePrevFrameMvs = pictureInfo.UsePrevInFindMvRefs,
RefFrameSignBias = pictureInfo.RefFrameSignBias,
BaseQindex = pictureInfo.BaseQIndex,
YDcDeltaQ = pictureInfo.YDcDeltaQ,
UvAcDeltaQ = pictureInfo.UvAcDeltaQ,
UvDcDeltaQ = pictureInfo.UvDcDeltaQ,
};
cm.Mb.Lossless = pictureInfo.Lossless;
cm.Mb.Bd = 8;
cm.TxMode = (TxMode)pictureInfo.TransformMode;
cm.AllowHighPrecisionMv = pictureInfo.AllowHighPrecisionMv;
cm.InterpFilter = (byte)pictureInfo.InterpFilter;
if (cm.InterpFilter != Constants.Switchable)
{
cm.InterpFilter = LiteralToFilter[cm.InterpFilter];
}
cm.ReferenceMode = (ReferenceMode)pictureInfo.ReferenceMode;
cm.CompFixedRef = pictureInfo.CompFixedRef;
cm.CompVarRef = pictureInfo.CompVarRef;
cm.Log2TileCols = pictureInfo.Log2TileCols;
cm.Log2TileRows = pictureInfo.Log2TileRows;
cm.Seg.Enabled = pictureInfo.SegmentEnabled;
cm.Seg.UpdateMap = pictureInfo.SegmentMapUpdate;
cm.Seg.TemporalUpdate = pictureInfo.SegmentMapTemporalUpdate;
cm.Seg.AbsDelta = (byte)pictureInfo.SegmentAbsDelta;
cm.Seg.FeatureMask = pictureInfo.SegmentFeatureEnable;
cm.Seg.FeatureData = pictureInfo.SegmentFeatureData;
cm.Lf.ModeRefDeltaEnabled = pictureInfo.ModeRefDeltaEnabled;
cm.Lf.RefDeltas = pictureInfo.RefDeltas;
cm.Lf.ModeDeltas = pictureInfo.ModeDeltas;
cm.Fc = new Ptr<Vp9EntropyProbs>(ref pictureInfo.Entropy);
cm.Counts = new Ptr<Vp9BackwardUpdates>(ref pictureInfo.BackwardUpdateCounts);
cm.FrameRefs[0].Buf = (Surface)pictureInfo.LastReference;
cm.FrameRefs[1].Buf = (Surface)pictureInfo.GoldenReference;
cm.FrameRefs[2].Buf = (Surface)pictureInfo.AltReference;
cm.Mb.CurBuf = (Surface)output;
cm.Mb.SetupBlockPlanes(1, 1);
int tileCols = 1 << pictureInfo.Log2TileCols;
int tileRows = 1 << pictureInfo.Log2TileRows;
// Video usually have only 4 columns, so more threads won't make a difference for those.
// Try to not take all CPU cores for video decoding.
int maxThreads = Math.Min(4, Environment.ProcessorCount / 2);
cm.AllocTileWorkerData(_allocator, tileCols, tileRows, maxThreads);
cm.AllocContextBuffers(_allocator, output.Width, output.Height);
cm.InitContextBuffers();
cm.SetupSegmentationDequant();
cm.SetupScaleFactors();
SetMvs(ref cm, mvsIn);
fixed (byte* dataPtr = bitstream)
{
try
{
if (maxThreads > 1 && tileRows == 1 && tileCols > 1)
{
DecodeFrame.DecodeTilesMt(ref cm, new ArrayPtr<byte>(dataPtr, bitstream.Length), maxThreads);
}
else
{
DecodeFrame.DecodeTiles(ref cm, new ArrayPtr<byte>(dataPtr, bitstream.Length));
}
}
catch (InternalErrorException)
{
return false;
}
}
GetMvs(ref cm, mvsOut);
cm.FreeTileWorkerData(_allocator);
cm.FreeContextBuffers(_allocator);
return true;
}
private static void SetMvs(ref Vp9Common cm, ReadOnlySpan<Vp9MvRef> mvs)
{
if (mvs.Length > cm.PrevFrameMvs.Length)
{
throw new ArgumentException($"Size mismatch, expected: {cm.PrevFrameMvs.Length}, but got: {mvs.Length}.");
}
for (int i = 0; i < mvs.Length; i++)
{
ref var mv = ref cm.PrevFrameMvs[i];
mv.Mv[0].Row = mvs[i].Mvs[0].Row;
mv.Mv[0].Col = mvs[i].Mvs[0].Col;
mv.Mv[1].Row = mvs[i].Mvs[1].Row;
mv.Mv[1].Col = mvs[i].Mvs[1].Col;
mv.RefFrame[0] = (sbyte)mvs[i].RefFrames[0];
mv.RefFrame[1] = (sbyte)mvs[i].RefFrames[1];
}
}
private static void GetMvs(ref Vp9Common cm, Span<Vp9MvRef> mvs)
{
if (mvs.Length > cm.CurFrameMvs.Length)
{
throw new ArgumentException($"Size mismatch, expected: {cm.CurFrameMvs.Length}, but got: {mvs.Length}.");
}
for (int i = 0; i < mvs.Length; i++)
{
ref var mv = ref cm.CurFrameMvs[i];
mvs[i].Mvs[0].Row = mv.Mv[0].Row;
mvs[i].Mvs[0].Col = mv.Mv[0].Col;
mvs[i].Mvs[1].Row = mv.Mv[1].Row;
mvs[i].Mvs[1].Col = mv.Mv[1].Col;
mvs[i].RefFrames[0] = mv.RefFrame[0];
mvs[i].RefFrames[1] = mv.RefFrame[1];
}
}
public void Dispose() => _allocator.Dispose();
}
}
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