mirror of
https://github.com/GreemDev/Ryujinx.git
synced 2024-12-23 23:15:47 +00:00
283 lines
7.3 KiB
C#
283 lines
7.3 KiB
C#
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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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namespace Ryujinx.Audio.OpenAL
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{
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public class OpenALAudioOut : IAalOutput
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{
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private const int MaxTracks = 256;
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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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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 bool Disposed;
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public Track(int SampleRate, ALFormat Format)
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{
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this.SampleRate = SampleRate;
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this.Format = Format;
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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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}
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public int GetBufferId(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 long[] GetReleasedBuffers()
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{
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ClearReleased();
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List<long> Tags = new List<long>();
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foreach (long Tag in Buffers.Keys)
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{
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if (!ContainsBuffer(Tag))
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{
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Tags.Add(Tag);
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}
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}
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return Tags.ToArray();
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}
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public void ClearReleased()
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{
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SyncQueuedTags();
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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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AL.SourceUnqueueBuffers(SourceId, ReleasedCount);
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}
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}
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public bool ContainsBuffer(long Tag)
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{
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SyncQueuedTags();
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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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private void SyncQueuedTags()
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{
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AL.GetSource(SourceId, ALGetSourcei.BuffersQueued, out int QueuedCount);
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AL.GetSource(SourceId, ALGetSourcei.BuffersProcessed, out int ReleasedCount);
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QueuedCount -= ReleasedCount;
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while (QueuedTagsQueue.Count > QueuedCount)
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{
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QueuedTagsQueue.Dequeue();
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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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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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}
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public int OpenTrack(int SampleRate, int Channels, out AudioFormat Format)
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{
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Format = AudioFormat.PcmInt16;
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Track Td = new Track(SampleRate, GetALFormat(Channels, Format));
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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, AudioFormat Format)
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{
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if (Channels < 1 || Channels > 2)
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{
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throw new ArgumentOutOfRangeException(nameof(Channels));
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}
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if (Channels == 1)
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{
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switch (Format)
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{
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case AudioFormat.PcmInt8: return ALFormat.Mono8;
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case AudioFormat.PcmInt16: return ALFormat.Mono16;
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}
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}
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else /* if (Channels == 2) */
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{
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switch (Format)
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{
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case AudioFormat.PcmInt8: return ALFormat.Stereo8;
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case AudioFormat.PcmInt16: return ALFormat.Stereo16;
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}
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}
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throw new ArgumentException(nameof(Format));
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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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Td.Dispose();
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}
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}
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public void AppendBuffer(int Track, long Tag, byte[] Buffer)
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{
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if (Tracks.TryGetValue(Track, out Track Td))
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{
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int BufferId = Td.GetBufferId(Tag);
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AL.BufferData(BufferId, Td.Format, Buffer, Buffer.Length, 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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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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return Td.ContainsBuffer(Tag);
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}
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return false;
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}
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public long[] GetReleasedBuffers(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.GetReleasedBuffers();
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}
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return null;
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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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Td.State = PlaybackState.Playing;
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StartPlaybackIfNeeded(Td);
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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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Td.ClearReleased();
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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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Td.State = PlaybackState.Stopped;
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AL.SourceStop(Td.SourceId);
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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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}
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}
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