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.H264/Decoder.cs | 40 ++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 Ryujinx.Graphics.Nvdec.H264/Decoder.cs

(limited to 'Ryujinx.Graphics.Nvdec.H264/Decoder.cs')

diff --git a/Ryujinx.Graphics.Nvdec.H264/Decoder.cs b/Ryujinx.Graphics.Nvdec.H264/Decoder.cs
new file mode 100644
index 00000000..7a7e184a
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.H264/Decoder.cs
@@ -0,0 +1,40 @@
+using Ryujinx.Graphics.Video;
+using System;
+
+namespace Ryujinx.Graphics.Nvdec.H264
+{
+    public class Decoder : IH264Decoder
+    {
+        public bool IsHardwareAccelerated => false;
+
+        private const int WorkBufferSize = 0x200;
+
+        private readonly byte[] _workBuffer = new byte[WorkBufferSize];
+
+        private readonly FFmpegContext _context = new FFmpegContext();
+
+        public ISurface CreateSurface(int width, int height)
+        {
+            return new Surface();
+        }
+
+        public bool Decode(ref H264PictureInfo pictureInfo, ISurface output, ReadOnlySpan<byte> bitstream)
+        {
+            Span<byte> bs = Prepend(bitstream, SpsAndPpsReconstruction.Reconstruct(ref pictureInfo, _workBuffer));
+
+            return _context.DecodeFrame((Surface)output, bs) == 0;
+        }
+
+        private static byte[] Prepend(ReadOnlySpan<byte> data, ReadOnlySpan<byte> prep)
+        {
+            byte[] output = new byte[data.Length + prep.Length];
+
+            prep.CopyTo(output);
+            data.CopyTo(new Span<byte>(output).Slice(prep.Length));
+
+            return output;
+        }
+
+        public void Dispose() => _context.Dispose();
+    }
+}
-- 
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