Remove dependency for FFmpeg.AutoGen and Update FFmpeg to 5.0.1 for Windows (#3466)

* Remove dependency for FFMpeg.AutoGen

Also prepare for FFMpeg 5.0 and 5.1

* Update Ryujinx.Graphics.Nvdec.Dependencies to 5.0.1-build10

* Address gdkchan's comments

* Address Ack's comment

* Address gdkchan's comment

1 files changed, 23 insertions, 0 deletions

diff --git a/Ryujinx.Graphics.Nvdec.FFmpeg/Native/FFCodecLegacy.cs b/Ryujinx.Graphics.Nvdec.FFmpeg/Native/FFCodecLegacy.cs
new file mode 100644
index 00000000..910270a5
--- /dev/null
+++ b/Ryujinx.Graphics.Nvdec.FFmpeg/Native/FFCodecLegacy.cs
@@ -0,0 +1,23 @@
+using System;
+
+namespace Ryujinx.Graphics.Nvdec.FFmpeg.Native
+{
+    struct FFCodecLegacy<T> where T: struct
+    {
+#pragma warning disable CS0649
+        public T Base;
+        public uint CapsInternalOrCbType;
+        public int PrivDataSize;
+        public IntPtr UpdateThreadContext;
+        public IntPtr UpdateThreadContextForUser;
+        public IntPtr Defaults;
+        public IntPtr InitStaticData;
+        public IntPtr Init;
+        public IntPtr EncodeSub;
+        public IntPtr Encode2;
+        public IntPtr Decode;
+#pragma warning restore CS0649
+
+        // NOTE: There is more after, but the layout kind of changed a bit and we don't need more than this. This is safe as we only manipulate this behind a reference.
+    }
+}