From 009e6bcd1b4d55f511fc947d2d029f3f68b50d5d Mon Sep 17 00:00:00 2001
From: merry <git@mary.rs>
Date: Fri, 20 Jan 2023 20:46:13 +0000
Subject: Audio: Implement PCM24 output (#4321)

---
 Ryujinx.Audio/Renderer/Dsp/PcmHelper.cs | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

(limited to 'Ryujinx.Audio/Renderer')

diff --git a/Ryujinx.Audio/Renderer/Dsp/PcmHelper.cs b/Ryujinx.Audio/Renderer/Dsp/PcmHelper.cs
index 1459e3a0..0233a8d7 100644
--- a/Ryujinx.Audio/Renderer/Dsp/PcmHelper.cs
+++ b/Ryujinx.Audio/Renderer/Dsp/PcmHelper.cs
@@ -37,19 +37,32 @@ namespace Ryujinx.Audio.Renderer.Dsp
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static TOutput ConvertSample<TInput, TOutput>(TInput value) where TInput: INumber<TInput>, IMinMaxValue<TInput> where TOutput : INumber<TOutput>, IMinMaxValue<TOutput>
+        public static void ConvertSampleToPcm8(Span<sbyte> output, ReadOnlySpan<short> input)
         {
-            TInput conversionRate = TInput.CreateSaturating(TOutput.MaxValue / TOutput.CreateSaturating(TInput.MaxValue));
+            for (int i = 0; i < input.Length; i++)
+            {
+                // Output most significant byte
+                output[i] = (sbyte)(input[i] >> 8);
+            }
+        }
 
-            return TOutput.CreateSaturating(value * conversionRate);
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void ConvertSampleToPcm24(Span<byte> output, ReadOnlySpan<short> input)
+        {
+            for (int i = 0; i < input.Length; i++)
+            {
+                output[i * 3 + 2] = (byte)(input[i] >> 8);
+                output[i * 3 + 1] = (byte)(input[i] & 0xff);
+                output[i * 3 + 0] = 0;
+            }
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static void Convert<TInput, TOutput>(Span<TOutput> output, ReadOnlySpan<TInput> input) where TInput : INumber<TInput>, IMinMaxValue<TInput> where TOutput : INumber<TOutput>, IMinMaxValue<TOutput>
+        public static void ConvertSampleToPcm32(Span<int> output, ReadOnlySpan<short> input)
         {
             for (int i = 0; i < input.Length; i++)
             {
-                output[i] = ConvertSample<TInput, TOutput>(input[i]);
+                output[i] = ((int)input[i]) << 16;
             }
         }
 
-- 
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