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

1 files changed, 67 insertions, 0 deletions

diff --git a/Ryujinx.Audio/Renderer/Common/BehaviourParameter.cs b/Ryujinx.Audio/Renderer/Common/BehaviourParameter.cs
new file mode 100644
index 00000000..0de3d571
--- /dev/null
+++ b/Ryujinx.Audio/Renderer/Common/BehaviourParameter.cs
@@ -0,0 +1,67 @@
+//
+// 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.InteropServices;
+
+namespace Ryujinx.Audio.Renderer.Common
+{
+    /// <summary>
+    /// Represents the input parameter for <see cref="Server.BehaviourContext"/>.
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential, Pack = 1)]
+    public struct BehaviourParameter
+    {
+        /// <summary>
+        /// The current audio renderer revision in use.
+        /// </summary>
+        public int UserRevision;
+
+        /// <summary>
+        /// Reserved/padding.
+        /// </summary>
+        private uint _padding;
+
+        /// <summary>
+        /// The flags given controlling behaviour of the audio renderer
+        /// </summary>
+        /// <remarks>See <see cref="Server.BehaviourContext.UpdateFlags(ulong)"/> and <see cref="Server.BehaviourContext.IsMemoryPoolForceMappingEnabled"/>.</remarks>
+        public ulong Flags;
+
+        /// <summary>
+        /// Represents an error during <see cref="Server.AudioRenderSystem.Update(System.Memory{byte}, System.Memory{byte}, System.ReadOnlyMemory{byte})"/>.
+        /// </summary>
+        [StructLayout(LayoutKind.Sequential, Pack = 1)]
+        public struct ErrorInfo
+        {
+            /// <summary>
+            /// The error code to report.
+            /// </summary>
+            public ResultCode ErrorCode;
+
+            /// <summary>
+            /// Reserved/padding.
+            /// </summary>
+            private uint _padding;
+
+            /// <summary>
+            /// Extra information given with the <see cref="ResultCode"/>
+            /// </summary>
+            /// <remarks>This is usually used to report a faulting cpu address when a <see cref="Server.MemoryPool.MemoryPoolState"/> mapping fail.</remarks>
+            public ulong ExtraErrorInfo;
+        }
+    }
+}