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/TxMode.cs

@@ -0,0 +1,12 @@
+namespace Ryujinx.Graphics.Nvdec.Vp9.Types
+{
+    public enum TxMode
+    {
+        Only4X4 = 0,      // Only 4x4 transform used
+        Allow8X8 = 1,     // Allow block transform size up to 8x8
+        Allow16X16 = 2,   // Allow block transform size up to 16x16
+        Allow32X32 = 3,   // Allow block transform size up to 32x32
+        TxModeSelect = 4, // Transform specified for each block
+        TxModes = 5
+    }
+}