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

Ryujinx.Audio/Renderer/Server/Performance/IPerformanceHeader.cs

@@ -0,0 +1,97 @@
+//
+// 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/>.
+//
+
+namespace Ryujinx.Audio.Renderer.Server.Performance
+{
+    /// <summary>
+    /// The header of a performance frame.
+    /// </summary>
+    public interface IPerformanceHeader
+    {
+        /// <summary>
+        /// Get the entry count offset in this structure.
+        /// </summary>
+        /// <returns>The entry count offset in this structure.</returns>
+        int GetEntryCountOffset();
+
+        /// <summary>
+        /// Set the DSP running behind flag.
+        /// </summary>
+        /// <param name="isRunningBehind">The flag.</param>
+        void SetDspRunningBehind(bool isRunningBehind);
+
+        /// <summary>
+        /// Set the count of voices that were dropped.
+        /// </summary>
+        /// <param name="voiceCount">The count of voices that were dropped.</param>
+        void SetVoiceDropCount(uint voiceCount);
+
+        /// <summary>
+        /// Set the start ticks of the <see cref="Dsp.AudioProcessor"/>. (before sending commands)
+        /// </summary>
+        /// <param name="startTicks">The start ticks of the <see cref="Dsp.AudioProcessor"/>. (before sending commands)</param>
+        void SetStartRenderingTicks(ulong startTicks);
+
+        /// <summary>
+        /// Set the header magic.
+        /// </summary>
+        /// <param name="magic">The header magic.</param>
+        void SetMagic(uint magic);
+
+        /// <summary>
+        /// Set the offset of the next performance header.
+        /// </summary>
+        /// <param name="nextOffset">The offset of the next performance header.</param>
+        void SetNextOffset(int nextOffset);
+
+        /// <summary>
+        /// Set the total time taken by all the commands profiled.
+        /// </summary>
+        /// <param name="totalProcessingTime">The total time taken by all the commands profiled.</param>
+        void SetTotalProcessingTime(int totalProcessingTime);
+
+        /// <summary>
+        /// Set the index of this performance frame.
+        /// </summary>
+        /// <param name="index">The index of this performance frame.</param>
+        void SetIndex(uint index);
+
+        /// <summary>
+        /// Get the total count of entries in this frame.
+        /// </summary>
+        /// <returns>The total count of entries in this frame.</returns>
+        int GetEntryCount();
+
+        /// <summary>
+        /// Get the total count of detailed entries in this frame.
+        /// </summary>
+        /// <returns>The total count of detailed entries in this frame.</returns>
+        int GetEntryDetailCount();
+
+        /// <summary>
+        /// Set the total count of entries in this frame.
+        /// </summary>
+        /// <param name="entryCount">The total count of entries in this frame.</param>
+        void SetEntryCount(int entryCount);
+
+        /// <summary>
+        /// Set the total count of detailed entries in this frame.
+        /// </summary>
+        /// <param name="entryDetailCount">The total count of detailed entries in this frame.</param>
+        void SetEntryDetailCount(int entryDetailCount);
+    }
+}