New NVDEC and VIC implementation (#1384)

* Initial NVDEC and VIC implementation

* Update FFmpeg.AutoGen to 4.3.0

* Add nvdec dependencies for Windows

* Unify some VP9 structures

* Rename VP9 structure fields

* Improvements to Video API

* XML docs for Common.Memory

* Remove now unused or redundant overloads from MemoryAccessor

* NVDEC UV surface read/write scalar paths

* Add FIXME comments about hacky things/stuff that will need to be fixed in the future

* Cleaned up VP9 memory allocation

* Remove some debug logs

* Rename some VP9 structs

* Remove unused struct

* No need to compile Ryujinx.Graphics.Host1x with unsafe anymore

* Name AsyncWorkQueue threads to make debugging easier

* Make Vp9PictureInfo a ref struct

* LayoutConverter no longer needs the depth argument (broken by rebase)

* Pooling of VP9 buffers, plus fix a memory leak on VP9

* Really wish VS could rename projects properly...

* Address feedback

* Remove using

* Catch OperationCanceledException

* Add licensing informations

* Add THIRDPARTY.md to release too

Co-authored-by: Thog <me@thog.eu>

Ryujinx.Graphics.Nvdec.Vp9/Types/PredictionMode.cs

@@ -0,0 +1,21 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    internal enum PredictionMode
+    {
+        DcPred = 0,    // Average of above and left pixels
+        VPred = 1,     // Vertical
+        HPred = 2,     // Horizontal
+        D45Pred = 3,   // Directional 45  deg = round(arctan(1 / 1) * 180 / pi)
+        D135Pred = 4,  // Directional 135 deg = 180 - 45
+        D117Pred = 5,  // Directional 117 deg = 180 - 63
+        D153Pred = 6,  // Directional 153 deg = 180 - 27
+        D207Pred = 7,  // Directional 207 deg = 180 + 27
+        D63Pred = 8,   // Directional 63  deg = round(arctan(2 / 1) * 180 / pi)
+        TmPred = 9,    // True-motion
+        NearestMv = 10,
+        NearMv = 11,
+        ZeroMv = 12,
+        NewMv = 13,
+        MbModeCount = 14
+    }
+}