From f556c80d0230056335632b60c71f1567e177239e Mon Sep 17 00:00:00 2001
From: Mary <me@thog.eu>
Date: Fri, 26 Feb 2021 01:11:56 +0100
Subject: Haydn: Part 1 (#2007)

* Haydn: Part 1

Based on my reverse of audio 11.0.0.

As always, core implementation under LGPLv3 for the same reasons as for Amadeus.

This place the bases of a more flexible audio system while making audout & audin accurate.

This have the following improvements:
- Complete reimplementation of audout and audin.
- Audin currently only have a dummy backend.
- Dramatically reduce CPU usage by up to 50% in common cases (SoundIO and OpenAL).
- Audio Renderer now can output to 5.1 devices when supported.
- Audio Renderer init its backend on demand instead of keeping two up all the time.
- All backends implementation are now in their own project.
- Ryujinx.Audio.Renderer was renamed Ryujinx.Audio and was refactored because of this.

As a note, games having issues with OpenAL haven't improved and will not
because of OpenAL design (stopping when buffers finish playing causing
possible audio "pops" when buffers are very small).

* Update for latest hexkyz's edits on Switchbrew

* audren: Rollback channel configuration changes

* Address gdkchan's comments

* Fix typo in OpenAL backend driver

* Address last comments

* Fix a nit

* Address gdkchan's comments
---
 .../Renderer/Utils/AudioProcessorMemoryManager.cs  | 75 ++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 Ryujinx.Audio/Renderer/Utils/AudioProcessorMemoryManager.cs

(limited to 'Ryujinx.Audio/Renderer/Utils/AudioProcessorMemoryManager.cs')

diff --git a/Ryujinx.Audio/Renderer/Utils/AudioProcessorMemoryManager.cs b/Ryujinx.Audio/Renderer/Utils/AudioProcessorMemoryManager.cs
new file mode 100644
index 00000000..99cbfcdc
--- /dev/null
+++ b/Ryujinx.Audio/Renderer/Utils/AudioProcessorMemoryManager.cs
@@ -0,0 +1,75 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System.Runtime.CompilerServices;
+
+using DspAddress = System.UInt64;
+using CpuAddress = System.UInt64;
+
+namespace Ryujinx.Audio.Renderer.Utils
+{
+    /// <summary>
+    /// The <see cref="Dsp.AudioProcessor"/> memory management
+    /// </summary>
+    /// <remarks>This is stub for the most part but is kept to permit LLE if wanted.</remarks>
+    static class AudioProcessorMemoryManager
+    {
+        /// <summary>
+        /// Map the given <see cref="CpuAddress"/> to the <see cref="Dsp.AudioProcessor"/> address space.
+        /// </summary>
+        /// <param name="processHandle">The process owning the CPU memory.</param>
+        /// <param name="cpuAddress">The <see cref="CpuAddress"/> to map.</param>
+        /// <param name="size">The size of the CPU memory region to map.</param>
+        /// <returns>The address on the <see cref="Dsp.AudioProcessor"/> address space.</returns>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static DspAddress Map(uint processHandle, CpuAddress cpuAddress, ulong size)
+        {
+            return cpuAddress;
+        }
+
+        /// <summary>
+        /// Unmap the given <see cref="CpuAddress"/> from the <see cref="Dsp.AudioProcessor"/> address space.
+        /// </summary>
+        /// <param name="processHandle">The process owning the CPU memory.</param>
+        /// <param name="cpuAddress">The <see cref="CpuAddress"/> to unmap.</param>
+        /// <param name="size">The size of the CPU memory region to unmap.</param>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void Unmap(uint processHandle, CpuAddress cpuAddress, ulong size)
+        {
+        }
+
+        /// <summary>
+        /// Invalidate the <see cref="Dsp.AudioProcessor"/> data cache at the given address.
+        /// </summary>
+        /// <param name="address">The base DSP address to invalidate</param>
+        /// <param name="size">The size of the DSP memory region to invalidate.</param>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void InvalidateDspCache(DspAddress address, ulong size)
+        {
+        }
+
+        /// <summary>
+        /// Invalidate the CPU data cache at the given address.
+        /// </summary>
+        /// <param name="address">The base <see cref="CpuAddress"/> to invalidate</param>
+        /// <param name="size">The size of the CPU memory region to invalidate.</param>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void InvalidateDataCache(CpuAddress address, ulong size)
+        {
+        }
+    }
+}
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