1 files changed, 334 insertions, 0 deletions
diff --git a/Ryujinx.Audio/Renderer/Server/AudioRendererManager.cs b/Ryujinx.Audio/Renderer/Server/AudioRendererManager.cs
new file mode 100644
index 00000000..ec847948
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+++ b/Ryujinx.Audio/Renderer/Server/AudioRendererManager.cs
@@ -0,0 +1,334 @@
+//
+// 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 Ryujinx.Audio.Integration;
+using Ryujinx.Audio.Renderer.Dsp;
+using Ryujinx.Audio.Renderer.Parameter;
+using Ryujinx.Common.Logging;
+using Ryujinx.Memory;
+using System;
+using System.Diagnostics;
+using System.Threading;
+
+namespace Ryujinx.Audio.Renderer.Server
+{
+    /// <summary>
+    /// The audio renderer manager.
+    /// </summary>
+    public class AudioRendererManager : IDisposable
+    {
+        /// <summary>
+        /// Lock used for session allocation.
+        /// </summary>
+        private object _sessionLock = new object();
+
+        /// <summary>
+        /// Lock used to control the <see cref="AudioProcessor"/> running state.
+        /// </summary>
+        private object _audioProcessorLock = new object();
+
+        /// <summary>
+        /// The session ids allocation table.
+        /// </summary>
+        private int[] _sessionIds;
+
+        /// <summary>
+        /// The events linked to each session.
+        /// </summary>
+        private IWritableEvent[] _sessionsSystemEvent;
+
+        /// <summary>
+        /// The <see cref="AudioRenderSystem"/> sessions instances.
+        /// </summary>
+        private AudioRenderSystem[] _sessions;
+
+        /// <summary>
+        /// The count of active sessions.
+        /// </summary>
+        private int _activeSessionCount;
+
+        /// <summary>
+        /// The worker thread used to run <see cref="SendCommands"/>.
+        /// </summary>
+        private Thread _workerThread;
+
+        /// <summary>
+        /// Indicate if the worker thread and <see cref="AudioProcessor"/> are running.
+        /// </summary>
+        private bool _isRunning;
+
+        /// <summary>
+        /// The audio device driver to create audio outputs.
+        /// </summary>
+        private IHardwareDeviceDriver _deviceDriver;
+
+        /// <summary>
+        /// The <see cref="AudioProcessor"/> instance associated to this manager.
+        /// </summary>
+        public AudioProcessor Processor { get; }
+
+        /// <summary>
+        /// Create a new <see cref="AudioRendererManager"/>.
+        /// </summary>
+        public AudioRendererManager()
+        {
+            Processor = new AudioProcessor();
+            _sessionIds = new int[Constants.AudioRendererSessionCountMax];
+            _sessions = new AudioRenderSystem[Constants.AudioRendererSessionCountMax];
+            _activeSessionCount = 0;
+
+            for (int i = 0; i < _sessionIds.Length; i++)
+            {
+                _sessionIds[i] = i;
+            }
+        }
+
+        /// <summary>
+        /// Initialize the <see cref="AudioRendererManager"/>.
+        /// </summary>
+        /// <param name="sessionSystemEvents">The events associated to each session.</param>
+        /// <param name="deviceDriver">The device driver to use to create audio outputs.</param>
+        public void Initialize(IWritableEvent[] sessionSystemEvents, IHardwareDeviceDriver deviceDriver)
+        {
+            _sessionsSystemEvent = sessionSystemEvents;
+            _deviceDriver = deviceDriver;
+        }
+
+        /// <summary>
+        /// Get the work buffer size required by a session.
+        /// </summary>
+        /// <param name="parameter">The user configuration</param>
+        /// <returns>The work buffer size required by a session.</returns>
+        public static ulong GetWorkBufferSize(ref AudioRendererConfiguration parameter)
+        {
+            return AudioRenderSystem.GetWorkBufferSize(ref parameter);
+        }
+
+        /// <summary>
+        /// Acquire a new session id.
+        /// </summary>
+        /// <returns>A new session id.</returns>
+        private int AcquireSessionId()
+        {
+            lock (_sessionLock)
+            {
+                int index = _activeSessionCount;
+
+                Debug.Assert(index < _sessionIds.Length);
+
+                int sessionId = _sessionIds[index];
+
+                _sessionIds[index] = -1;
+
+                _activeSessionCount++;
+
+                Logger.Info?.Print(LogClass.AudioRenderer, $"Registered new renderer ({sessionId})");
+
+                return sessionId;
+            }
+        }
+
+        /// <summary>
+        /// Release a given <paramref name="sessionId"/>.
+        /// </summary>
+        /// <param name="sessionId">The session id to release.</param>
+        private void ReleaseSessionId(int sessionId)
+        {
+            lock (_sessionLock)
+            {
+                Debug.Assert(_activeSessionCount > 0);
+
+                int newIndex = --_activeSessionCount;
+
+                _sessionIds[newIndex] = sessionId;
+            }
+
+            Logger.Info?.Print(LogClass.AudioRenderer, $"Unregistered renderer ({sessionId})");
+        }
+
+        /// <summary>
+        /// Check if there is any audio renderer active.
+        /// </summary>
+        /// <returns>Returns true if there is any audio renderer active.</returns>
+        private bool HasAnyActiveRendererLocked()
+        {
+            foreach (AudioRenderSystem renderer in _sessions)
+            {
+                if (renderer != null)
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// Start the <see cref="AudioProcessor"/> and worker thread.
+        /// </summary>
+        private void StartLocked()
+        {
+            _isRunning = true;
+
+            // TODO: virtual device mapping (IAudioDevice)
+            Processor.Start(_deviceDriver);
+
+            _workerThread = new Thread(SendCommands)
+            {
+                Name = "AudioRendererManager.Worker"
+            };
+
+            _workerThread.Start();
+        }
+
+        /// <summary>
+        /// Stop the <see cref="AudioProcessor"/> and worker thread.
+        /// </summary>
+        private void StopLocked()
+        {
+            _isRunning = false;
+
+            _workerThread.Join();
+            Processor.Stop();
+
+            Logger.Info?.Print(LogClass.AudioRenderer, "Stopped audio renderer");
+        }
+
+        /// <summary>
+        /// Worker main function. This is used to dispatch audio renderer commands to the <see cref="AudioProcessor"/>.
+        /// </summary>
+        private void SendCommands()
+        {
+            Logger.Info?.Print(LogClass.AudioRenderer, "Starting audio renderer");
+            Processor.Wait();
+
+            while (_isRunning)
+            {
+                lock (_sessionLock)
+                {
+                    foreach(AudioRenderSystem renderer in _sessions)
+                    {
+                        renderer?.SendCommands();
+                    }
+                }
+
+                Processor.Signal();
+                Processor.Wait();
+            }
+        }
+
+        /// <summary>
+        /// Register a new <see cref="AudioRenderSystem"/>.
+        /// </summary>
+        /// <param name="renderer">The <see cref="AudioRenderSystem"/> to register.</param>
+        private void Register(AudioRenderSystem renderer)
+        {
+            lock (_sessionLock)
+            {
+                _sessions[renderer.GetSessionId()] = renderer;
+            }
+
+            lock (_audioProcessorLock)
+            {
+                if (!_isRunning)
+                {
+                    StartLocked();
+                }
+            }
+        }
+
+        /// <summary>
+        /// Unregister a new <see cref="AudioRenderSystem"/>.
+        /// </summary>
+        /// <param name="renderer">The <see cref="AudioRenderSystem"/> to unregister.</param>
+        internal void Unregister(AudioRenderSystem renderer)
+        {
+            lock (_sessionLock)
+            {
+                int sessionId = renderer.GetSessionId();
+
+                _sessions[renderer.GetSessionId()] = null;
+
+                ReleaseSessionId(sessionId);
+            }
+
+            lock (_audioProcessorLock)
+            {
+                if (_isRunning && !HasAnyActiveRendererLocked())
+                {
+                    StopLocked();
+                }
+            }
+        }
+
+        /// <summary>
+        /// Open a new <see cref="AudioRenderSystem"/>
+        /// </summary>
+        /// <param name="renderer">The new <see cref="AudioRenderSystem"/></param>
+        /// <param name="memoryManager">The memory manager that will be used for all guest memory operations.</param>
+        /// <param name="parameter">The user configuration</param>
+        /// <param name="appletResourceUserId">The applet resource user id of the application.</param>
+        /// <param name="workBufferAddress">The guest work buffer address.</param>
+        /// <param name="workBufferSize">The guest work buffer size.</param>
+        /// <param name="processHandle">The process handle of the application.</param>
+        /// <returns>A <see cref="ResultCode"/> reporting an error or a success.</returns>
+        public ResultCode OpenAudioRenderer(out AudioRenderSystem renderer, IVirtualMemoryManager memoryManager, ref AudioRendererConfiguration parameter, ulong appletResourceUserId, ulong workBufferAddress, ulong workBufferSize, uint processHandle)
+        {
+            int sessionId = AcquireSessionId();
+
+            AudioRenderSystem audioRenderer = new AudioRenderSystem(this, _sessionsSystemEvent[sessionId]);
+
+            ResultCode result = audioRenderer.Initialize(ref parameter, processHandle, workBufferAddress, workBufferSize, sessionId, appletResourceUserId, memoryManager);
+
+            if (result == ResultCode.Success)
+            {
+                renderer = audioRenderer;
+
+                Register(renderer);
+            }
+            else
+            {
+                ReleaseSessionId(sessionId);
+
+                renderer = null;
+            }
+
+            return result;
+        }
+
+        public void Dispose()
+        {
+            Dispose(true);
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (disposing)
+            {
+                lock (_audioProcessorLock)
+                {
+                    if (_isRunning)
+                    {
+                        StopLocked();
+                    }
+                }
+
+                Processor.Dispose();
+            }
+        }
+    }
+}