SDK20 and REV15 support (ryubing/ryujinx!50)

See merge request ryubing/ryujinx!50

src/Ryujinx.Audio/Renderer/Server/Upsampler/UpsamplerInfo.cs

@@ -0,0 +1,68 @@
+using System;
+
+namespace Ryujinx.Audio.Renderer.Server.Upsampler
+{
+    /// <summary>
+    /// Server state for a upsampling.
+    /// </summary>
+    public class UpsamplerInfo
+    {
+        /// <summary>
+        /// The output buffer containing the target samples.
+        /// </summary>
+        public Memory<float> OutputBuffer { get; }
+
+        /// <summary>
+        /// The target sample count.
+        /// </summary>
+        public uint SampleCount { get; }
+
+        /// <summary>
+        /// The index of the <see cref="UpsamplerInfo"/>. (used to free it)
+        /// </summary>
+        private readonly int _index;
+
+        /// <summary>
+        /// The <see cref="UpsamplerManager"/>.
+        /// </summary>
+        private readonly UpsamplerManager _manager;
+
+        /// <summary>
+        /// The source sample count.
+        /// </summary>
+        public uint SourceSampleCount;
+
+        /// <summary>
+        /// The input buffer indices of the buffers holding the samples that need upsampling.
+        /// </summary>
+        public ushort[] InputBufferIndices;
+
+        /// <summary>
+        /// State of each input buffer index kept across invocations of the upsampler.
+        /// </summary>
+        public UpsamplerBufferState[] BufferStates;
+
+        /// <summary>
+        /// Create a new <see cref="UpsamplerInfo"/>.
+        /// </summary>
+        /// <param name="manager">The upsampler manager.</param>
+        /// <param name="index">The index of the <see cref="UpsamplerInfo"/>. (used to free it)</param>
+        /// <param name="outputBuffer">The output buffer used to contain the target samples.</param>
+        /// <param name="sampleCount">The target sample count.</param>
+        public UpsamplerInfo(UpsamplerManager manager, int index, Memory<float> outputBuffer, uint sampleCount)
+        {
+            _manager = manager;
+            _index = index;
+            OutputBuffer = outputBuffer;
+            SampleCount = sampleCount;
+        }
+
+        /// <summary>
+        /// Release the <see cref="UpsamplerInfo"/>.
+        /// </summary>
+        public void Release()
+        {
+            _manager.Free(_index);
+        }
+    }
+}