1 files changed, 40 insertions, 0 deletions
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();
+    }
+}