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using Ryujinx.Audio.Backends.Common;
using Ryujinx.Audio.Common;
using Ryujinx.Audio.Renderer.Dsp;
using System;
using System.Runtime.InteropServices;
namespace Ryujinx.Audio.Backends.CompatLayer
{
class CompatLayerHardwareDeviceSession : HardwareDeviceSessionOutputBase
{
private readonly HardwareDeviceSessionOutputBase _realSession;
private readonly SampleFormat _userSampleFormat;
private readonly uint _userChannelCount;
public CompatLayerHardwareDeviceSession(HardwareDeviceSessionOutputBase realSession, SampleFormat userSampleFormat, uint userChannelCount) : base(realSession.MemoryManager, realSession.RequestedSampleFormat, realSession.RequestedSampleRate, userChannelCount)
{
_realSession = realSession;
_userSampleFormat = userSampleFormat;
_userChannelCount = userChannelCount;
}
public override void Dispose()
{
_realSession.Dispose();
}
public override ulong GetPlayedSampleCount()
{
return _realSession.GetPlayedSampleCount();
}
public override float GetVolume()
{
return _realSession.GetVolume();
}
public override void PrepareToClose()
{
_realSession.PrepareToClose();
}
public override void QueueBuffer(AudioBuffer buffer)
{
SampleFormat realSampleFormat = _realSession.RequestedSampleFormat;
if (_userSampleFormat != realSampleFormat)
{
if (_userSampleFormat != SampleFormat.PcmInt16)
{
throw new NotImplementedException("Converting formats other than PCM16 is not supported.");
}
int userSampleCount = buffer.Data.Length / BackendHelper.GetSampleSize(_userSampleFormat);
ReadOnlySpan<short> samples = MemoryMarshal.Cast<byte, short>(buffer.Data);
byte[] convertedSamples = new byte[BackendHelper.GetSampleSize(realSampleFormat) * userSampleCount];
switch (realSampleFormat)
{
case SampleFormat.PcmInt8:
PcmHelper.ConvertSampleToPcm8(MemoryMarshal.Cast<byte, sbyte>(convertedSamples), samples);
break;
case SampleFormat.PcmInt24:
PcmHelper.ConvertSampleToPcm24(convertedSamples, samples);
break;
case SampleFormat.PcmInt32:
PcmHelper.ConvertSampleToPcm32(MemoryMarshal.Cast<byte, int>(convertedSamples), samples);
break;
case SampleFormat.PcmFloat:
PcmHelper.ConvertSampleToPcmFloat(MemoryMarshal.Cast<byte, float>(convertedSamples), samples);
break;
default:
throw new NotImplementedException($"Sample format conversion from {_userSampleFormat} to {realSampleFormat} not implemented.");
}
buffer.Data = convertedSamples;
}
_realSession.QueueBuffer(buffer);
}
public override bool RegisterBuffer(AudioBuffer buffer, byte[] samples)
{
if (samples == null)
{
return false;
}
if (_userChannelCount != _realSession.RequestedChannelCount)
{
if (_userSampleFormat != SampleFormat.PcmInt16)
{
throw new NotImplementedException("Downmixing formats other than PCM16 is not supported.");
}
ReadOnlySpan<short> samplesPCM16 = MemoryMarshal.Cast<byte, short>(samples);
if (_userChannelCount == 6)
{
samplesPCM16 = Downmixing.DownMixSurroundToStereo(samplesPCM16);
if (_realSession.RequestedChannelCount == 1)
{
samplesPCM16 = Downmixing.DownMixStereoToMono(samplesPCM16);
}
}
else if (_userChannelCount == 2 && _realSession.RequestedChannelCount == 1)
{
samplesPCM16 = Downmixing.DownMixStereoToMono(samplesPCM16);
}
else
{
throw new NotImplementedException($"Downmixing from {_userChannelCount} to {_realSession.RequestedChannelCount} not implemented.");
}
samples = MemoryMarshal.Cast<short, byte>(samplesPCM16).ToArray();
}
AudioBuffer fakeBuffer = new()
{
BufferTag = buffer.BufferTag,
DataPointer = buffer.DataPointer,
DataSize = (ulong)samples.Length,
};
bool result = _realSession.RegisterBuffer(fakeBuffer, samples);
if (result)
{
buffer.Data = fakeBuffer.Data;
buffer.DataSize = fakeBuffer.DataSize;
}
return result;
}
public override void SetVolume(float volume)
{
_realSession.SetVolume(volume);
}
public override void Start()
{
_realSession.Start();
}
public override void Stop()
{
_realSession.Stop();
}
public override void UnregisterBuffer(AudioBuffer buffer)
{
_realSession.UnregisterBuffer(buffer);
}
public override bool WasBufferFullyConsumed(AudioBuffer buffer)
{
return _realSession.WasBufferFullyConsumed(buffer);
}
}
}
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