JinxRyu/Ryujinx.Audio/Renderers/SoundIo/SoundIoAudioOut.cs
Mary 5b26e4ef94
Misc audio fixes (#1348)
Changes:

    Implement software surround downmixing (fix #796).
    Fix a crash when no audio renderer were created when stopping emulation.

NOTE: This PR also disable support of 5.1 surround on the OpenAL backend as we cannot detect if the hardware directly support it. (the downmixing applied by OpenAL on Windows is terribly slow)
2020-08-18 21:03:55 +02:00

330 lines
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10 KiB
C#

using Ryujinx.Audio.SoundIo;
using SoundIOSharp;
using System;
using System.Collections.Generic;
namespace Ryujinx.Audio
{
/// <summary>
/// An audio renderer that uses libsoundio as the audio backend
/// </summary>
public class SoundIoAudioOut : IAalOutput
{
/// <summary>
/// The maximum amount of tracks we can issue simultaneously
/// </summary>
private const int MaximumTracks = 256;
/// <summary>
/// The volume of audio renderer
/// </summary>
private float _volume = 1.0f;
/// <summary>
/// True if the volume of audio renderer have changed
/// </summary>
private bool _volumeChanged;
/// <summary>
/// The <see cref="SoundIO"/> audio context
/// </summary>
private SoundIO _audioContext;
/// <summary>
/// The <see cref="SoundIODevice"/> audio device
/// </summary>
private SoundIODevice _audioDevice;
/// <summary>
/// An object pool containing <see cref="SoundIoAudioTrack"/> objects
/// </summary>
private SoundIoAudioTrackPool _trackPool;
/// <summary>
/// True if SoundIO is supported on the device
/// </summary>
public static bool IsSupported
{
get
{
return IsSupportedInternal();
}
}
/// <summary>
/// Constructs a new instance of a <see cref="SoundIoAudioOut"/>
/// </summary>
public SoundIoAudioOut()
{
_audioContext = new SoundIO();
_audioContext.Connect();
_audioContext.FlushEvents();
_audioDevice = FindNonRawDefaultAudioDevice(_audioContext, true);
_trackPool = new SoundIoAudioTrackPool(_audioContext, _audioDevice, MaximumTracks);
}
public bool SupportsChannelCount(int channels)
{
return _audioDevice.SupportsChannelCount(channels);
}
/// <summary>
/// Creates a new audio track with the specified parameters
/// </summary>
/// <param name="sampleRate">The requested sample rate</param>
/// <param name="hardwareChannels">The requested hardware channels</param>
/// <param name="virtualChannels">The requested virtual channels</param>
/// <param name="callback">A <see cref="ReleaseCallback" /> that represents the delegate to invoke when a buffer has been released by the audio track</param>
/// <returns>The created track's Track ID</returns>
public int OpenHardwareTrack(int sampleRate, int hardwareChannels, int virtualChannels, ReleaseCallback callback)
{
if (!_trackPool.TryGet(out SoundIoAudioTrack track))
{
return -1;
}
// Open the output. We currently only support 16-bit signed LE
track.Open(sampleRate, hardwareChannels, virtualChannels, callback, SoundIOFormat.S16LE);
return track.TrackID;
}
/// <summary>
/// Stops playback and closes the track specified by <paramref name="trackId"/>
/// </summary>
/// <param name="trackId">The ID of the track to close</param>
public void CloseTrack(int trackId)
{
if (_trackPool.TryGet(trackId, out SoundIoAudioTrack track))
{
// Close and dispose of the track
track.Close();
// Recycle the track back into the pool
_trackPool.Put(track);
}
}
/// <summary>
/// Returns a value indicating whether the specified buffer is currently reserved by the specified track
/// </summary>
/// <param name="trackId">The track to check</param>
/// <param name="bufferTag">The buffer tag to check</param>
public bool ContainsBuffer(int trackId, long bufferTag)
{
if (_trackPool.TryGet(trackId, out SoundIoAudioTrack track))
{
return track.ContainsBuffer(bufferTag);
}
return false;
}
/// <summary>
/// Gets a list of buffer tags the specified track is no longer reserving
/// </summary>
/// <param name="trackId">The track to retrieve buffer tags from</param>
/// <param name="maxCount">The maximum amount of buffer tags to retrieve</param>
/// <returns>Buffers released by the specified track</returns>
public long[] GetReleasedBuffers(int trackId, int maxCount)
{
if (_trackPool.TryGet(trackId, out SoundIoAudioTrack track))
{
List<long> bufferTags = new List<long>();
while(maxCount-- > 0 && track.ReleasedBuffers.TryDequeue(out long tag))
{
bufferTags.Add(tag);
}
return bufferTags.ToArray();
}
return new long[0];
}
/// <summary>
/// Appends an audio buffer to the specified track
/// </summary>
/// <typeparam name="T">The sample type of the buffer</typeparam>
/// <param name="trackId">The track to append the buffer to</param>
/// <param name="bufferTag">The internal tag of the buffer</param>
/// <param name="buffer">The buffer to append to the track</param>
public void AppendBuffer<T>(int trackId, long bufferTag, T[] buffer) where T : struct
{
if (_trackPool.TryGet(trackId, out SoundIoAudioTrack track))
{
if (_volumeChanged)
{
track.AudioStream.SetVolume(_volume);
_volumeChanged = false;
}
track.AppendBuffer(bufferTag, buffer);
}
}
/// <summary>
/// Starts playback
/// </summary>
/// <param name="trackId">The ID of the track to start playback on</param>
public void Start(int trackId)
{
if (_trackPool.TryGet(trackId, out SoundIoAudioTrack track))
{
track.Start();
}
}
/// <summary>
/// Stops playback
/// </summary>
/// <param name="trackId">The ID of the track to stop playback on</param>
public void Stop(int trackId)
{
if (_trackPool.TryGet(trackId, out SoundIoAudioTrack track))
{
track.Stop();
}
}
/// <summary>
/// Get playback volume
/// </summary>
public float GetVolume() => _volume;
/// <summary>
/// Set playback volume
/// </summary>
/// <param name="volume">The volume of the playback</param>
public void SetVolume(float volume)
{
if (!_volumeChanged)
{
_volume = volume;
_volumeChanged = true;
}
}
/// <summary>
/// Gets the current playback state of the specified track
/// </summary>
/// <param name="trackId">The track to retrieve the playback state for</param>
public PlaybackState GetState(int trackId)
{
if (_trackPool.TryGet(trackId, out SoundIoAudioTrack track))
{
return track.State;
}
return PlaybackState.Stopped;
}
/// <summary>
/// Releases the unmanaged resources used by the <see cref="SoundIoAudioOut" />
/// </summary>
public void Dispose()
{
_trackPool.Dispose();
_audioContext.Disconnect();
_audioContext.Dispose();
}
/// <summary>
/// Searches for a shared version of the default audio device
/// </summary>
/// <param name="audioContext">The <see cref="SoundIO"/> audio context</param>
/// <param name="fallback">Whether to fallback to the raw default audio device if a non-raw device cannot be found</param>
private static SoundIODevice FindNonRawDefaultAudioDevice(SoundIO audioContext, bool fallback = false)
{
SoundIODevice defaultAudioDevice = audioContext.GetOutputDevice(audioContext.DefaultOutputDeviceIndex);
if (!defaultAudioDevice.IsRaw)
{
return defaultAudioDevice;
}
for (int i = 0; i < audioContext.BackendCount; i++)
{
SoundIODevice audioDevice = audioContext.GetOutputDevice(i);
if (audioDevice.Id == defaultAudioDevice.Id && !audioDevice.IsRaw)
{
return audioDevice;
}
}
return fallback ? defaultAudioDevice : null;
}
/// <summary>
/// Determines if SoundIO can connect to a supported backend
/// </summary>
/// <returns></returns>
private static bool IsSupportedInternal()
{
SoundIO context = null;
SoundIODevice device = null;
SoundIOOutStream stream = null;
bool backendDisconnected = false;
try
{
context = new SoundIO();
context.OnBackendDisconnect = (i) => {
backendDisconnected = true;
};
context.Connect();
context.FlushEvents();
if (backendDisconnected)
{
return false;
}
if (context.OutputDeviceCount == 0)
{
return false;
}
device = FindNonRawDefaultAudioDevice(context);
if (device == null || backendDisconnected)
{
return false;
}
stream = device.CreateOutStream();
if (stream == null || backendDisconnected)
{
return false;
}
return true;
}
catch
{
return false;
}
finally
{
if (stream != null)
{
stream.Dispose();
}
if (context != null)
{
context.Dispose();
}
}
}
}
}