Basic audio support

Implement IAudioOut.
Small corrections on AudIAudioRenderer.
Add glitched audio playback support through OpenAL.

5 files changed, 211 insertions, 7 deletions

diff --git a/README.md b/README.md
index 1c8850de..857ba680 100644
--- a/README.md
+++ b/README.md
@@ -8,3 +8,6 @@ Contributions are always welcome.
 
 To run this emulator, you need the .NET Core 2.0 (or higher) SDK.
 Run `dotnet run -c Release -- game.nro` inside the Ryujinx solution folder.
+
+Audio is partially supported (glitched) on Windows, you need to install the OpenAL Core SDK :
+https://openal.org/downloads/OpenAL11CoreSDK.zip
diff --git a/Ryujinx/OsHle/Ipc/IpcHandler.cs b/Ryujinx/OsHle/Ipc/IpcHandler.cs
index 50968014..4e57889a 100644
--- a/Ryujinx/OsHle/Ipc/IpcHandler.cs
+++ b/Ryujinx/OsHle/Ipc/IpcHandler.cs
@@ -127,8 +127,20 @@ namespace Ryujinx.OsHle.Ipc
             //IAudioRenderer
             { (typeof(AudIAudioRenderer), 4), AudIAudioRenderer.RequestUpdateAudioRenderer },
             { (typeof(AudIAudioRenderer), 5), AudIAudioRenderer.StartAudioRenderer         },
+            { (typeof(AudIAudioRenderer), 6), AudIAudioRenderer.StopAudioRenderer          },
             { (typeof(AudIAudioRenderer), 7), AudIAudioRenderer.QuerySystemEvent           },
 
+            //IAudioOut
+            { (typeof(AudIAudioOut), 0), AudIAudioOut.GetAudioOutState             },
+            { (typeof(AudIAudioOut), 1), AudIAudioOut.StartAudioOut                },
+            { (typeof(AudIAudioOut), 2), AudIAudioOut.StopAudioOut                 },
+            { (typeof(AudIAudioOut), 3), AudIAudioOut.AppendAudioOutBuffer         },
+            { (typeof(AudIAudioOut), 4), AudIAudioOut.RegisterBufferEvent          },
+            { (typeof(AudIAudioOut), 5), AudIAudioOut.GetReleasedAudioOutBuffer    },
+            { (typeof(AudIAudioOut), 6), AudIAudioOut.ContainsAudioOutBuffer       },
+            { (typeof(AudIAudioOut), 7), AudIAudioOut.AppendAudioOutBuffer_ex      },
+            { (typeof(AudIAudioOut), 8), AudIAudioOut.GetReleasedAudioOutBuffer_ex },
+
             //IFile
             { (typeof(FspSrvIFile), 0), FspSrvIFile.Read  },
             { (typeof(FspSrvIFile), 1), FspSrvIFile.Write },
diff --git a/Ryujinx/OsHle/Objects/AudIAudioOut.cs b/Ryujinx/OsHle/Objects/AudIAudioOut.cs
new file mode 100644
index 00000000..f9b8d1ca
--- /dev/null
+++ b/Ryujinx/OsHle/Objects/AudIAudioOut.cs
@@ -0,0 +1,164 @@
+using ChocolArm64.Memory;
+using Ryujinx.OsHle.Handles;
+using Ryujinx.OsHle.Ipc;
+using System.Collections.Generic;
+using System.IO;
+using static Ryujinx.OsHle.Objects.ObjHelper;
+using OpenTK.Audio;
+using OpenTK.Audio.OpenAL; // https://openal.org/downloads/OpenAL11CoreSDK.zip Needed!
+using System;
+
+namespace Ryujinx.OsHle.Objects
+{
+    class AudIAudioOut
+    {
+        enum AudioOutState
+        {
+            Started,
+            Stopped
+        };
+
+        //IAudioOut
+        private static AudioOutState State = AudioOutState.Stopped;
+        private static List<long> KeysQueue = new List<long>();
+
+        //OpenAL
+        private static bool OpenALInstalled = true;
+        private static AudioContext AudioCtx;
+        private static int Source;
+        private static int Buffer;
+
+        //Return State of IAudioOut
+        public static long GetAudioOutState(ServiceCtx Context)
+        {
+            Context.ResponseData.Write((int)State);
+
+            return 0;
+        }
+
+        public static long StartAudioOut(ServiceCtx Context)
+        {
+            if (State == AudioOutState.Stopped)
+            {
+                State = AudioOutState.Started;
+
+                try
+                { 
+                    AudioCtx = new AudioContext(); //Create the audio context
+                }
+                catch (Exception ex)
+                {
+                    Console.WriteLine("OpenAL Error! PS: Install OpenAL Core SDK!");
+                    OpenALInstalled = false;
+                }
+
+                if(OpenALInstalled) AL.Listener(ALListenerf.Gain, (float)8.0); //Add more gain to it
+            }
+
+            return 0;
+        }
+
+        public static long StopAudioOut(ServiceCtx Context)
+        {
+            if (State == AudioOutState.Started)
+            {
+                if (OpenALInstalled)
+                { 
+                    if (AudioCtx == null) //Needed to call the instance of AudioContext()
+                        return 0;
+
+                    AL.SourceStop(Source);
+                    AL.DeleteSource(Source);
+                }
+                State = AudioOutState.Stopped;
+            }
+
+            return 0;
+        }
+
+        public static long AppendAudioOutBuffer(ServiceCtx Context)
+        {
+            long BufferId = Context.RequestData.ReadInt64();
+
+            KeysQueue.Insert(0, BufferId);
+
+            byte[] AudioOutBuffer = AMemoryHelper.ReadBytes(Context.Memory, Context.Request.SendBuff[0].Position, 0x28);
+            using (MemoryStream MS = new MemoryStream(AudioOutBuffer))
+            {
+                BinaryReader Reader = new BinaryReader(MS);
+                long PointerToSampleDataPointer = Reader.ReadInt64();
+                long PointerToSampleData = Reader.ReadInt64();
+                long CapacitySampleBuffer = Reader.ReadInt64();
+                long SizeDataSampleBuffer = Reader.ReadInt64();
+                long Unknown = Reader.ReadInt64();
+
+                byte[] AudioSampleBuffer = AMemoryHelper.ReadBytes(Context.Memory, PointerToSampleData, (int)SizeDataSampleBuffer);
+
+                if (OpenALInstalled)
+                {
+                    if (AudioCtx == null) //Needed to call the instance of AudioContext()
+                        return 0;
+
+                    Buffer = AL.GenBuffer();
+                    AL.BufferData(Buffer, ALFormat.Stereo16, AudioSampleBuffer, AudioSampleBuffer.Length, 48000);
+
+                    Source = AL.GenSource();
+                    AL.SourceQueueBuffer(Source, Buffer);
+                }
+            }
+
+            return 0;
+        }
+
+        public static long RegisterBufferEvent(ServiceCtx Context)
+        {
+            int Handle = Context.Ns.Os.Handles.GenerateId(new HEvent());
+
+            Context.Response.HandleDesc = IpcHandleDesc.MakeCopy(Handle);
+
+            return 0;
+        }
+
+        public static long GetReleasedAudioOutBuffer(ServiceCtx Context)
+        {
+            long TempKey = 0;
+
+            if(KeysQueue.Count > 0)
+            {
+                TempKey = KeysQueue[KeysQueue.Count - 1];
+                KeysQueue.Remove(KeysQueue[KeysQueue.Count - 1]);
+            }
+
+            AMemoryHelper.WriteBytes(Context.Memory, Context.Request.ReceiveBuff[0].Position, System.BitConverter.GetBytes(TempKey));
+
+            Context.ResponseData.Write((int)TempKey);
+
+            if (OpenALInstalled)
+            {
+                if (AudioCtx == null) //Needed to call the instance of AudioContext()
+                    return 0;
+
+                AL.SourcePlay(Source);
+                int[] FreeBuffers = AL.SourceUnqueueBuffers(Source, 1);
+                AL.DeleteBuffers(FreeBuffers);
+            }
+
+            return 0;
+        }
+
+        public static long ContainsAudioOutBuffer(ServiceCtx Context)
+        {
+            return 0;
+        }
+
+        public static long AppendAudioOutBuffer_ex(ServiceCtx Context)
+        {
+            return 0;
+        }
+
+        public static long GetReleasedAudioOutBuffer_ex(ServiceCtx Context)
+        {
+            return 0;
+        }
+    }
+}
diff --git a/Ryujinx/OsHle/Objects/AudIAudioRenderer.cs b/Ryujinx/OsHle/Objects/AudIAudioRenderer.cs
index 84ac4e04..35a5b82d 100644
--- a/Ryujinx/OsHle/Objects/AudIAudioRenderer.cs
+++ b/Ryujinx/OsHle/Objects/AudIAudioRenderer.cs
@@ -1,15 +1,20 @@
+using Ryujinx.OsHle.Handles;
+using Ryujinx.OsHle.Ipc;
+
 namespace Ryujinx.OsHle.Objects
 {
     class AudIAudioRenderer
     {
         public static long RequestUpdateAudioRenderer(ServiceCtx Context)
         {
+            //buffer < unknown, 5, 0 >) -> (buffer < unknown, 6, 0 >, buffer < unknown, 6, 0 >
+
             long Position = Context.Request.ReceiveBuff[0].Position;
 
             //0x40 bytes header
-            Context.Memory.WriteInt32(Position + 0x4,  0xb0); //Behavior Out State Size? (note: this is the last section)
-            Context.Memory.WriteInt32(Position + 0x8,  0x18e0); //Memory Pool Out State Size?
-            Context.Memory.WriteInt32(Position + 0xc,  0x600); //Voice Out State Size?
+            Context.Memory.WriteInt32(Position + 0x4, 0xb0); //Behavior Out State Size? (note: this is the last section)
+            Context.Memory.WriteInt32(Position + 0x8, 0x18e0); //Memory Pool Out State Size?
+            Context.Memory.WriteInt32(Position + 0xc, 0x600); //Voice Out State Size?
             Context.Memory.WriteInt32(Position + 0x14, 0xe0); //Effect Out State Size?
             Context.Memory.WriteInt32(Position + 0x1c, 0x20); //Sink Out State Size?
             Context.Memory.WriteInt32(Position + 0x20, 0x10); //Performance Out State Size?
@@ -28,8 +33,17 @@ namespace Ryujinx.OsHle.Objects
             return 0;
         }
 
+        public static long StopAudioRenderer(ServiceCtx Context)
+        {
+            return 0;
+        }
+
         public static long QuerySystemEvent(ServiceCtx Context)
         {
+            int Handle = Context.Ns.Os.Handles.GenerateId(new HEvent());
+
+            Context.Response.HandleDesc = IpcHandleDesc.MakeCopy(Handle);
+
             return 0;
         }
     }
diff --git a/Ryujinx/OsHle/Services/ServiceAud.cs b/Ryujinx/OsHle/Services/ServiceAud.cs
index 96e7e548..18401ae9 100644
--- a/Ryujinx/OsHle/Services/ServiceAud.cs
+++ b/Ryujinx/OsHle/Services/ServiceAud.cs
@@ -21,10 +21,21 @@ namespace Ryujinx.OsHle.Services
 
         public static long AudOutOpenAudioOut(ServiceCtx Context)
         {
-            Context.ResponseData.Write(48000);
-            Context.ResponseData.Write(2);
-            Context.ResponseData.Write(2);
-            Context.ResponseData.Write(0);
+            MakeObject(Context, new AudIAudioOut());
+
+            Context.ResponseData.Write(48000); //Sample Rate
+            Context.ResponseData.Write(2); //Channel Count
+            Context.ResponseData.Write(2); //PCM Format
+            /*  
+                0 - Invalid
+                1 - INT8
+                2 - INT16
+                3 - INT24
+                4 - INT32
+                5 - PCM Float
+                6 - ADPCM
+            */
+            Context.ResponseData.Write(0); //Unknown
 
             return 0;
         }