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using Ryujinx.Audio.Common;
using Ryujinx.Audio.Integration;
using Ryujinx.Common.Logging;
using Ryujinx.Memory;
using Ryujinx.SDL2.Common;
using System;
using System.Collections.Concurrent;
using System.Runtime.InteropServices;
using System.Threading;
using static Ryujinx.Audio.Integration.IHardwareDeviceDriver;
using static SDL2.SDL;
namespace Ryujinx.Audio.Backends.SDL2
{
public class SDL2HardwareDeviceDriver : IHardwareDeviceDriver
{
private readonly ManualResetEvent _updateRequiredEvent;
private readonly ManualResetEvent _pauseEvent;
private readonly ConcurrentDictionary<SDL2HardwareDeviceSession, byte> _sessions;
private readonly bool _supportSurroundConfiguration;
public float Volume { get; set; }
// TODO: Add this to SDL2-CS
// NOTE: We use a DllImport here because of marshaling issue for spec.
#pragma warning disable SYSLIB1054
[DllImport("SDL2")]
private static extern int SDL_GetDefaultAudioInfo(IntPtr name, out SDL_AudioSpec spec, int isCapture);
#pragma warning restore SYSLIB1054
public SDL2HardwareDeviceDriver()
{
_updateRequiredEvent = new ManualResetEvent(false);
_pauseEvent = new ManualResetEvent(true);
_sessions = new ConcurrentDictionary<SDL2HardwareDeviceSession, byte>();
SDL2Driver.Instance.Initialize();
int res = SDL_GetDefaultAudioInfo(IntPtr.Zero, out var spec, 0);
if (res != 0)
{
Logger.Error?.Print(LogClass.Application,
$"SDL_GetDefaultAudioInfo failed with error \"{SDL_GetError()}\"");
_supportSurroundConfiguration = true;
}
else
{
_supportSurroundConfiguration = spec.channels >= 6;
}
Volume = 1f;
}
public static bool IsSupported => IsSupportedInternal();
private static bool IsSupportedInternal()
{
uint device = OpenStream(SampleFormat.PcmInt16, Constants.TargetSampleRate, Constants.ChannelCountMax, Constants.TargetSampleCount, null);
if (device != 0)
{
SDL_CloseAudioDevice(device);
}
return device != 0;
}
public ManualResetEvent GetUpdateRequiredEvent()
{
return _updateRequiredEvent;
}
public ManualResetEvent GetPauseEvent()
{
return _pauseEvent;
}
public IHardwareDeviceSession OpenDeviceSession(Direction direction, IVirtualMemoryManager memoryManager, SampleFormat sampleFormat, uint sampleRate, uint channelCount)
{
if (channelCount == 0)
{
channelCount = 2;
}
if (sampleRate == 0)
{
sampleRate = Constants.TargetSampleRate;
}
if (direction != Direction.Output)
{
throw new NotImplementedException("Input direction is currently not implemented on SDL2 backend!");
}
SDL2HardwareDeviceSession session = new(this, memoryManager, sampleFormat, sampleRate, channelCount);
_sessions.TryAdd(session, 0);
return session;
}
internal bool Unregister(SDL2HardwareDeviceSession session)
{
return _sessions.TryRemove(session, out _);
}
private static SDL_AudioSpec GetSDL2Spec(SampleFormat requestedSampleFormat, uint requestedSampleRate, uint requestedChannelCount, uint sampleCount)
{
return new SDL_AudioSpec
{
channels = (byte)requestedChannelCount,
format = GetSDL2Format(requestedSampleFormat),
freq = (int)requestedSampleRate,
samples = (ushort)sampleCount,
};
}
internal static ushort GetSDL2Format(SampleFormat format)
{
return format switch
{
SampleFormat.PcmInt8 => AUDIO_S8,
SampleFormat.PcmInt16 => AUDIO_S16,
SampleFormat.PcmInt32 => AUDIO_S32,
SampleFormat.PcmFloat => AUDIO_F32,
_ => throw new ArgumentException($"Unsupported sample format {format}"),
};
}
internal static uint OpenStream(SampleFormat requestedSampleFormat, uint requestedSampleRate, uint requestedChannelCount, uint sampleCount, SDL_AudioCallback callback)
{
SDL_AudioSpec desired = GetSDL2Spec(requestedSampleFormat, requestedSampleRate, requestedChannelCount, sampleCount);
desired.callback = callback;
uint device = SDL_OpenAudioDevice(IntPtr.Zero, 0, ref desired, out SDL_AudioSpec got, 0);
if (device == 0)
{
Logger.Error?.Print(LogClass.Application, $"SDL2 open audio device initialization failed with error \"{SDL_GetError()}\"");
return 0;
}
bool isValid = got.format == desired.format && got.freq == desired.freq && got.channels == desired.channels;
if (!isValid)
{
Logger.Error?.Print(LogClass.Application, "SDL2 open audio device is not valid");
SDL_CloseAudioDevice(device);
return 0;
}
return device;
}
public void Dispose()
{
GC.SuppressFinalize(this);
Dispose(true);
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
foreach (SDL2HardwareDeviceSession session in _sessions.Keys)
{
session.Dispose();
}
SDL2Driver.Instance.Dispose();
_pauseEvent.Dispose();
}
}
public bool SupportsSampleRate(uint sampleRate)
{
return true;
}
public bool SupportsSampleFormat(SampleFormat sampleFormat)
{
return sampleFormat != SampleFormat.PcmInt24;
}
public bool SupportsChannelCount(uint channelCount)
{
if (channelCount == 6)
{
return _supportSurroundConfiguration;
}
return true;
}
public bool SupportsDirection(Direction direction)
{
// TODO: add direction input when supported.
return direction == Direction.Output;
}
}
}
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