mirror of
https://github.com/GreemDev/Ryujinx.git
synced 2024-12-04 22:37:57 +01:00
348 lines
9.0 KiB
C#
348 lines
9.0 KiB
C#
using OpenTK.Audio;
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using OpenTK.Audio.OpenAL;
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Runtime.InteropServices;
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using System.Threading;
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namespace Ryujinx.Audio.OpenAL
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{
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public class OpenALAudioOut : IAalOutput, IDisposable
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{
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private const int MaxTracks = 256;
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private const int MaxReleased = 32;
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private AudioContext Context;
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private class Track : IDisposable
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{
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public int SourceId { get; private set; }
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public int SampleRate { get; private set; }
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public ALFormat Format { get; private set; }
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private ReleaseCallback Callback;
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public PlaybackState State { get; set; }
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private ConcurrentDictionary<long, int> Buffers;
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private Queue<long> QueuedTagsQueue;
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private Queue<long> ReleasedTagsQueue;
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private bool Disposed;
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public Track(int SampleRate, ALFormat Format, ReleaseCallback Callback)
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{
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this.SampleRate = SampleRate;
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this.Format = Format;
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this.Callback = Callback;
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State = PlaybackState.Stopped;
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SourceId = AL.GenSource();
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Buffers = new ConcurrentDictionary<long, int>();
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QueuedTagsQueue = new Queue<long>();
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ReleasedTagsQueue = new Queue<long>();
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}
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public bool ContainsBuffer(long Tag)
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{
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foreach (long QueuedTag in QueuedTagsQueue)
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{
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if (QueuedTag == Tag)
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{
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return true;
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}
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}
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return false;
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}
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public long[] GetReleasedBuffers(int Count)
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{
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AL.GetSource(SourceId, ALGetSourcei.BuffersProcessed, out int ReleasedCount);
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ReleasedCount += ReleasedTagsQueue.Count;
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if (Count > ReleasedCount)
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{
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Count = ReleasedCount;
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}
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List<long> Tags = new List<long>();
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while (Count-- > 0 && ReleasedTagsQueue.TryDequeue(out long Tag))
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{
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Tags.Add(Tag);
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}
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while (Count-- > 0 && QueuedTagsQueue.TryDequeue(out long Tag))
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{
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AL.SourceUnqueueBuffers(SourceId, 1);
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Tags.Add(Tag);
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}
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return Tags.ToArray();
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}
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public int AppendBuffer(long Tag)
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{
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if (Disposed)
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{
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throw new ObjectDisposedException(nameof(Track));
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}
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int Id = AL.GenBuffer();
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Buffers.AddOrUpdate(Tag, Id, (Key, OldId) =>
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{
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AL.DeleteBuffer(OldId);
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return Id;
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});
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QueuedTagsQueue.Enqueue(Tag);
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return Id;
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}
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public void CallReleaseCallbackIfNeeded()
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{
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AL.GetSource(SourceId, ALGetSourcei.BuffersProcessed, out int ReleasedCount);
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if (ReleasedCount > 0)
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{
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//If we signal, then we also need to have released buffers available
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//to return when GetReleasedBuffers is called.
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//If playback needs to be re-started due to all buffers being processed,
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//then OpenAL zeros the counts (ReleasedCount), so we keep it on the queue.
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while (ReleasedCount-- > 0 && QueuedTagsQueue.TryDequeue(out long Tag))
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{
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AL.SourceUnqueueBuffers(SourceId, 1);
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ReleasedTagsQueue.Enqueue(Tag);
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}
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Callback();
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}
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}
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public void Dispose()
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{
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Dispose(true);
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}
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protected virtual void Dispose(bool Disposing)
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{
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if (Disposing && !Disposed)
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{
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Disposed = true;
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AL.DeleteSource(SourceId);
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foreach (int Id in Buffers.Values)
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{
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AL.DeleteBuffer(Id);
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}
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}
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}
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}
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private ConcurrentDictionary<int, Track> Tracks;
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private Thread AudioPollerThread;
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private bool KeepPolling;
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public OpenALAudioOut()
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{
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Context = new AudioContext();
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Tracks = new ConcurrentDictionary<int, Track>();
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KeepPolling = true;
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AudioPollerThread = new Thread(AudioPollerWork);
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AudioPollerThread.Start();
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}
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private void AudioPollerWork()
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{
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do
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{
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foreach (Track Td in Tracks.Values)
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{
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lock (Td)
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{
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Td.CallReleaseCallbackIfNeeded();
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}
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}
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//If it's not slept it will waste cycles.
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Thread.Sleep(10);
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}
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while (KeepPolling);
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foreach (Track Td in Tracks.Values)
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{
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Td.Dispose();
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}
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Tracks.Clear();
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}
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public int OpenTrack(int SampleRate, int Channels, ReleaseCallback Callback)
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{
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Track Td = new Track(SampleRate, GetALFormat(Channels), Callback);
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for (int Id = 0; Id < MaxTracks; Id++)
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{
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if (Tracks.TryAdd(Id, Td))
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{
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return Id;
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}
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}
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return -1;
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}
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private ALFormat GetALFormat(int Channels)
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{
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switch (Channels)
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{
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case 1: return ALFormat.Mono16;
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case 2: return ALFormat.Stereo16;
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case 6: return ALFormat.Multi51Chn16Ext;
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}
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throw new ArgumentOutOfRangeException(nameof(Channels));
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}
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public void CloseTrack(int Track)
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{
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if (Tracks.TryRemove(Track, out Track Td))
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{
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lock (Td)
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{
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Td.Dispose();
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}
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}
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}
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public bool ContainsBuffer(int Track, long Tag)
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{
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if (Tracks.TryGetValue(Track, out Track Td))
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{
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lock (Td)
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{
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return Td.ContainsBuffer(Tag);
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}
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}
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return false;
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}
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public long[] GetReleasedBuffers(int Track, int MaxCount)
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{
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if (Tracks.TryGetValue(Track, out Track Td))
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{
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lock (Td)
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{
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return Td.GetReleasedBuffers(MaxCount);
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}
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}
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return null;
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}
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public void AppendBuffer<T>(int Track, long Tag, T[] Buffer) where T : struct
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{
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if (Tracks.TryGetValue(Track, out Track Td))
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{
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lock (Td)
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{
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int BufferId = Td.AppendBuffer(Tag);
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int Size = Buffer.Length * Marshal.SizeOf<T>();
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AL.BufferData<T>(BufferId, Td.Format, Buffer, Size, Td.SampleRate);
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AL.SourceQueueBuffer(Td.SourceId, BufferId);
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StartPlaybackIfNeeded(Td);
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}
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}
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}
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public void Start(int Track)
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{
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if (Tracks.TryGetValue(Track, out Track Td))
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{
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lock (Td)
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{
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Td.State = PlaybackState.Playing;
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StartPlaybackIfNeeded(Td);
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}
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}
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}
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private void StartPlaybackIfNeeded(Track Td)
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{
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AL.GetSource(Td.SourceId, ALGetSourcei.SourceState, out int StateInt);
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ALSourceState State = (ALSourceState)StateInt;
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if (State != ALSourceState.Playing && Td.State == PlaybackState.Playing)
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{
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AL.SourcePlay(Td.SourceId);
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}
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}
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public void Stop(int Track)
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{
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if (Tracks.TryGetValue(Track, out Track Td))
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{
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lock (Td)
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{
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Td.State = PlaybackState.Stopped;
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AL.SourceStop(Td.SourceId);
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}
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}
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}
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public PlaybackState GetState(int Track)
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{
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if (Tracks.TryGetValue(Track, out Track Td))
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{
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return Td.State;
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}
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return PlaybackState.Stopped;
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}
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public void Dispose()
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{
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Dispose(true);
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}
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protected virtual void Dispose(bool Disposing)
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{
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if (Disposing)
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{
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KeepPolling = false;
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}
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}
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}
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} |