NVDEC implementation using FFmpeg (#443)

* Initial nvdec implementation using FFmpeg

* Fix swapped channels on the video decoder and the G8R8 texture format

* Fix texture samplers not being set properly (regression)

* Rebased

* Remove unused code introduced on the rebase

* Add support for RGBA8 output format on the video image composer

* Correct spacing

* Some fixes for rebase and other tweaks

* Allow size mismatch on frame copy

* Get rid of GetHostAddress calls on VDec

1 files changed, 79 insertions, 0 deletions

diff --git a/Ryujinx.Graphics/VDec/Vp9FrameHeader.cs b/Ryujinx.Graphics/VDec/Vp9FrameHeader.cs
new file mode 100644
index 00000000..bdba6de5
--- /dev/null
+++ b/Ryujinx.Graphics/VDec/Vp9FrameHeader.cs
@@ -0,0 +1,79 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Graphics.VDec
+{
+    [StructLayout(LayoutKind.Sequential, Pack = 2)]
+    struct Vp9FrameDimensions
+    {
+        public short Width;
+        public short Height;
+        public short SubsamplingX; //?
+        public short SubsamplingY; //?
+    }
+
+    [StructLayout(LayoutKind.Sequential, Pack = 1)]
+    struct Vp9FrameHeader
+    {
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+        public Vp9FrameDimensions[] RefFrames;
+
+        public Vp9FrameDimensions CurrentFrame;
+
+        public int Flags;
+
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
+        public byte[] RefFrameSignBias;
+
+        public byte LoopFilterLevel;
+        public byte LoopFilterSharpness;
+
+        public byte  BaseQIndex;
+        public sbyte DeltaQYDc;
+        public sbyte DeltaQUvDc;
+        public sbyte DeltaQUvAc;
+
+        [MarshalAs(UnmanagedType.I1)]
+        public bool Lossless;
+
+        public byte TxMode;
+
+        [MarshalAs(UnmanagedType.I1)]
+        public bool AllowHighPrecisionMv;
+
+        public byte RawInterpolationFilter;
+        public byte CompPredMode;
+        public byte FixCompRef;
+        public byte VarCompRef0;
+        public byte VarCompRef1;
+
+        public byte TileColsLog2;
+        public byte TileRowsLog2;
+
+        [MarshalAs(UnmanagedType.I1)]
+        public bool SegmentationEnabled;
+
+        [MarshalAs(UnmanagedType.I1)]
+        public bool SegmentationUpdate;
+
+        [MarshalAs(UnmanagedType.I1)]
+        public bool SegmentationTemporalUpdate;
+
+        [MarshalAs(UnmanagedType.I1)]
+        public bool SegmentationAbsOrDeltaUpdate;
+
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8 * 4, ArraySubType = UnmanagedType.I1)]
+        public bool[] FeatureEnabled;
+
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8 * 4)]
+        public short[] FeatureData;
+
+        [MarshalAs(UnmanagedType.I1)]
+        public bool LoopFilterDeltaEnabled;
+
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
+        public sbyte[] LoopFilterRefDeltas;
+
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
+        public sbyte[] LoopFilterModeDeltas;
+    }
+}
\ No newline at end of file