From 4d02a2d2c0451b4de1f6de3bbce54c457cacebe2 Mon Sep 17 00:00:00 2001
From: gdkchan <gab.dark.100@gmail.com>
Date: Sun, 12 Jul 2020 00:07:01 -0300
Subject: 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/Common/BitUtils.cs | 59 +++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 Ryujinx.Graphics.Nvdec.Vp9/Common/BitUtils.cs

(limited to 'Ryujinx.Graphics.Nvdec.Vp9/Common/BitUtils.cs')

diff --git a/Ryujinx.Graphics.Nvdec.Vp9/Common/BitUtils.cs b/Ryujinx.Graphics.Nvdec.Vp9/Common/BitUtils.cs
new file mode 100644
index 00000000..a7c6d148
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.Vp9/Common/BitUtils.cs
@@ -0,0 +1,59 @@
+using System;
+using System.Diagnostics;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9.Common
+{
+    internal static class BitUtils
+    {
+        // FIXME: Enable inlining here after AVX2 gather bug is fixed.
+        // [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static byte ClipPixel(int val)
+        {
+            return (byte)((val > 255) ? 255 : (val < 0) ? 0 : val);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static ushort ClipPixelHighbd(int val, int bd)
+        {
+            return bd switch
+            {
+                10 => (ushort)Math.Clamp(val, 0, 1023),
+                12 => (ushort)Math.Clamp(val, 0, 4095),
+                _ => (ushort)Math.Clamp(val, 0, 255)
+            };
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int RoundPowerOfTwo(int value, int n)
+        {
+            return (value + (1 << (n - 1))) >> n;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static long RoundPowerOfTwo(long value, int n)
+        {
+            return (value + (1L << (n - 1))) >> n;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int AlignPowerOfTwo(int value, int n)
+        {
+            return (value + ((1 << n) - 1)) & ~((1 << n) - 1);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private static int GetMsb(uint n)
+        {
+            Debug.Assert(n != 0);
+            return 31 ^ BitOperations.LeadingZeroCount(n);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int GetUnsignedBits(uint numValues)
+        {
+            return numValues > 0 ? GetMsb(numValues) + 1 : 0;
+        }
+    }
+}
-- 
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