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, 118 insertions, 0 deletions

diff --git a/Ryujinx.Audio/Renderer/Server/Performance/PerformanceFrameHeaderVersion1.cs b/Ryujinx.Audio/Renderer/Server/Performance/PerformanceFrameHeaderVersion1.cs
new file mode 100644
index 00000000..b0757b37
--- /dev/null
+++ b/Ryujinx.Audio/Renderer/Server/Performance/PerformanceFrameHeaderVersion1.cs
@@ -0,0 +1,118 @@
+//
+// 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.Server.Performance
+{
+    /// <summary>
+    /// Implementation of <see cref="IPerformanceHeader"/> for performance metrics version 1.
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential, Pack = 1, Size = 0x18)]
+    public struct PerformanceFrameHeaderVersion1 : IPerformanceHeader
+    {
+        /// <summary>
+        /// The magic of the performance header.
+        /// </summary>
+        public uint Magic;
+
+        /// <summary>
+        /// The total count of entries in this frame.
+        /// </summary>
+        public int EntryCount;
+
+        /// <summary>
+        /// The total count of detailed entries in this frame.
+        /// </summary>
+        public int EntryDetailCount;
+
+        /// <summary>
+        /// The offset of the next performance header.
+        /// </summary>
+        public int NextOffset;
+
+        /// <summary>
+        /// The total time taken by all the commands profiled.
+        /// </summary>
+        public int TotalProcessingTime;
+
+        /// <summary>
+        /// The count of voices that were dropped.
+        /// </summary>
+        public uint VoiceDropCount;
+
+        public int GetEntryCount()
+        {
+            return EntryCount;
+        }
+
+        public int GetEntryCountOffset()
+        {
+            return 4;
+        }
+
+        public int GetEntryDetailCount()
+        {
+            return EntryDetailCount;
+        }
+
+        public void SetDspRunningBehind(bool isRunningBehind)
+        {
+            // NOTE: Not present in version 1
+        }
+
+        public void SetEntryCount(int entryCount)
+        {
+            EntryCount = entryCount;
+        }
+
+        public void SetEntryDetailCount(int entryDetailCount)
+        {
+            EntryDetailCount = entryDetailCount;
+        }
+
+        public void SetIndex(uint index)
+        {
+            // NOTE: Not present in version 1
+        }
+
+        public void SetMagic(uint magic)
+        {
+            Magic = magic;
+        }
+
+        public void SetNextOffset(int nextOffset)
+        {
+            NextOffset = nextOffset;
+        }
+
+        public void SetStartRenderingTicks(ulong startTicks)
+        {
+            // NOTE: not present in version 1
+        }
+
+        public void SetTotalProcessingTime(int totalProcessingTime)
+        {
+            TotalProcessingTime = totalProcessingTime;
+        }
+
+        public void SetVoiceDropCount(uint voiceCount)
+        {
+            VoiceDropCount = voiceCount;
+        }
+    }
+}