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using Ryujinx.Audio.Backends.Common;
using Ryujinx.Audio.Backends.Dummy;
using Ryujinx.Audio.Common;
using Ryujinx.Audio.Integration;
using Ryujinx.Common.Logging;
using Ryujinx.Memory;
using System;
using System.Threading;
using static Ryujinx.Audio.Integration.IHardwareDeviceDriver;
namespace Ryujinx.Audio.Backends.CompatLayer
{
public class CompatLayerHardwareDeviceDriver : IHardwareDeviceDriver
{
private IHardwareDeviceDriver _realDriver;
public static bool IsSupported => true;
public CompatLayerHardwareDeviceDriver(IHardwareDeviceDriver realDevice)
{
_realDriver = realDevice;
}
public void Dispose()
{
_realDriver.Dispose();
}
public ManualResetEvent GetUpdateRequiredEvent()
{
return _realDriver.GetUpdateRequiredEvent();
}
public ManualResetEvent GetPauseEvent()
{
return _realDriver.GetPauseEvent();
}
private uint SelectHardwareChannelCount(uint targetChannelCount)
{
if (_realDriver.SupportsChannelCount(targetChannelCount))
{
return targetChannelCount;
}
return targetChannelCount switch
{
6 => SelectHardwareChannelCount(2),
2 => SelectHardwareChannelCount(1),
1 => throw new ArgumentException("No valid channel configuration found!"),
_ => throw new ArgumentException($"Invalid targetChannelCount {targetChannelCount}")
};
}
private SampleFormat SelectHardwareSampleFormat(SampleFormat targetSampleFormat)
{
if (_realDriver.SupportsSampleFormat(targetSampleFormat))
{
return targetSampleFormat;
}
// Attempt conversion from PCM16.
if (targetSampleFormat == SampleFormat.PcmInt16)
{
// Prefer PCM32 if we need to convert.
if (_realDriver.SupportsSampleFormat(SampleFormat.PcmInt32))
{
return SampleFormat.PcmInt32;
}
// If not supported, PCM float provides the best quality with a cost lower than PCM24.
if (_realDriver.SupportsSampleFormat(SampleFormat.PcmFloat))
{
return SampleFormat.PcmFloat;
}
if (_realDriver.SupportsSampleFormat(SampleFormat.PcmInt24))
{
return SampleFormat.PcmInt24;
}
// If nothing is truly supported, attempt PCM8 at the cost of losing quality.
if (_realDriver.SupportsSampleFormat(SampleFormat.PcmInt8))
{
return SampleFormat.PcmInt8;
}
}
throw new ArgumentException("No valid sample format configuration found!");
}
public IHardwareDeviceSession OpenDeviceSession(Direction direction, IVirtualMemoryManager memoryManager, SampleFormat sampleFormat, uint sampleRate, uint channelCount, float volume)
{
if (channelCount == 0)
{
channelCount = 2;
}
if (sampleRate == 0)
{
sampleRate = Constants.TargetSampleRate;
}
volume = Math.Clamp(volume, 0, 1);
if (!_realDriver.SupportsDirection(direction))
{
if (direction == Direction.Input)
{
Logger.Warning?.Print(LogClass.Audio, "The selected audio backend doesn't support audio input, fallback to dummy...");
return new DummyHardwareDeviceSessionInput(this, memoryManager, sampleFormat, sampleRate, channelCount);
}
throw new NotImplementedException();
}
SampleFormat hardwareSampleFormat = SelectHardwareSampleFormat(sampleFormat);
uint hardwareChannelCount = SelectHardwareChannelCount(channelCount);
IHardwareDeviceSession realSession = _realDriver.OpenDeviceSession(direction, memoryManager, hardwareSampleFormat, sampleRate, hardwareChannelCount, volume);
if (hardwareChannelCount == channelCount && hardwareSampleFormat == sampleFormat)
{
return realSession;
}
if (hardwareSampleFormat != sampleFormat)
{
Logger.Warning?.Print(LogClass.Audio, $"{sampleFormat} isn't supported by the audio device, conversion to {hardwareSampleFormat} will happen.");
if (hardwareSampleFormat < sampleFormat)
{
Logger.Warning?.Print(LogClass.Audio, $"{hardwareSampleFormat} has lower quality than {sampleFormat}, expect some loss in audio fidelity.");
}
}
if (direction == Direction.Input)
{
Logger.Warning?.Print(LogClass.Audio, $"The selected audio backend doesn't support the requested audio input configuration, fallback to dummy...");
// TODO: We currently don't support audio input upsampling/downsampling, implement this.
realSession.Dispose();
return new DummyHardwareDeviceSessionInput(this, memoryManager, sampleFormat, sampleRate, channelCount);
}
// It must be a HardwareDeviceSessionOutputBase.
if (realSession is not HardwareDeviceSessionOutputBase realSessionOutputBase)
{
throw new InvalidOperationException($"Real driver session class type isn't based on {typeof(HardwareDeviceSessionOutputBase).Name}.");
}
// If we need to do post processing before sending to the hardware device, wrap around it.
return new CompatLayerHardwareDeviceSession(realSessionOutputBase, sampleFormat, channelCount);
}
public bool SupportsChannelCount(uint channelCount)
{
return channelCount == 1 || channelCount == 2 || channelCount == 6;
}
public bool SupportsSampleFormat(SampleFormat sampleFormat)
{
// TODO: More formats.
return sampleFormat == SampleFormat.PcmInt16;
}
public bool SupportsSampleRate(uint sampleRate)
{
// TODO: More sample rates.
return sampleRate == Constants.TargetSampleRate;
}
public IHardwareDeviceDriver GetRealDeviceDriver()
{
return _realDriver;
}
public bool SupportsDirection(Direction direction)
{
return direction == Direction.Input || direction == Direction.Output;
}
}
}
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