1 files changed, 99 insertions, 0 deletions
diff --git a/src/Ryujinx.Audio/Renderer/Utils/FileHardwareDevice.cs b/src/Ryujinx.Audio/Renderer/Utils/FileHardwareDevice.cs
new file mode 100644
index 00000000..d49313ea
--- /dev/null
+++ b/src/Ryujinx.Audio/Renderer/Utils/FileHardwareDevice.cs
@@ -0,0 +1,99 @@
+using Ryujinx.Audio.Integration;
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace Ryujinx.Audio.Renderer.Utils
+{
+    /// <summary>
+    /// A <see cref="IHardwareDevice"/> that outputs to a wav file.
+    /// </summary>
+    public class FileHardwareDevice : IHardwareDevice
+    {
+        private FileStream _stream;
+        private uint _channelCount;
+        private uint _sampleRate;
+
+        private const int HeaderSize = 44;
+
+        public FileHardwareDevice(string path, uint channelCount, uint sampleRate)
+        {
+            _stream = File.OpenWrite(path);
+            _channelCount = channelCount;
+            _sampleRate = sampleRate;
+
+            _stream.Seek(HeaderSize, SeekOrigin.Begin);
+        }
+
+        private void UpdateHeader()
+        {
+            var writer = new BinaryWriter(_stream);
+
+            long currentPos = writer.Seek(0, SeekOrigin.Current);
+
+            writer.Seek(0, SeekOrigin.Begin);
+
+            writer.Write("RIFF"u8);
+            writer.Write((int)(writer.BaseStream.Length - 8));
+            writer.Write("WAVE"u8);
+            writer.Write("fmt "u8);
+            writer.Write(16);
+            writer.Write((short)1);
+            writer.Write((short)GetChannelCount());
+            writer.Write(GetSampleRate());
+            writer.Write(GetSampleRate() * GetChannelCount() * sizeof(short));
+            writer.Write((short)(GetChannelCount() * sizeof(short)));
+            writer.Write((short)(sizeof(short) * 8));
+            writer.Write("data"u8);
+            writer.Write((int)(writer.BaseStream.Length - HeaderSize));
+
+            writer.Seek((int)currentPos, SeekOrigin.Begin);
+        }
+
+        public void AppendBuffer(ReadOnlySpan<short> data, uint channelCount)
+        {
+            _stream.Write(MemoryMarshal.Cast<short, byte>(data));
+
+            UpdateHeader();
+            _stream.Flush();
+        }
+
+        public void SetVolume(float volume)
+        {
+            // Do nothing, volume is not used for FileHardwareDevice at the moment.
+        }
+
+        public float GetVolume()
+        {
+            // FileHardwareDevice does not incorporate volume.
+            return 0;
+        }
+
+        public uint GetChannelCount()
+        {
+            return _channelCount;
+        }
+
+        public uint GetSampleRate()
+        {
+            return _sampleRate;
+        }
+
+        public void Dispose()
+        {
+            Dispose(true);
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (disposing)
+            {
+                _stream?.Flush();
+                _stream?.Dispose();
+
+                _stream = null;
+            }
+        }
+    }
+}
+\ No newline at end of file