MoonWorks/src/Audio/ReverbEffect.cs

80 lines
2.1 KiB
C#

using System;
using System.Runtime.InteropServices;
namespace MoonWorks.Audio
{
/// <summary>
/// Use this in conjunction with SourceVoice.SetReverbEffectChain to add reverb to a voice.
/// </summary>
public unsafe class ReverbEffect : SubmixVoice
{
// Defaults based on FAUDIOFX_I3DL2_PRESET_GENERIC
public static FAudio.FAudioFXReverbParameters DefaultParams = new FAudio.FAudioFXReverbParameters
{
WetDryMix = 100.0f,
ReflectionsDelay = 7,
ReverbDelay = 11,
RearDelay = FAudio.FAUDIOFX_REVERB_DEFAULT_REAR_DELAY,
PositionLeft = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION,
PositionRight = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION,
PositionMatrixLeft = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION_MATRIX,
PositionMatrixRight = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION_MATRIX,
EarlyDiffusion = 15,
LateDiffusion = 15,
LowEQGain = 8,
LowEQCutoff = 4,
HighEQGain = 8,
HighEQCutoff = 6,
RoomFilterFreq = 5000f,
RoomFilterMain = -10f,
RoomFilterHF = -1f,
ReflectionsGain = -26.0200005f,
ReverbGain = 10.0f,
DecayTime = 1.49000001f,
Density = 100.0f,
RoomSize = FAudio.FAUDIOFX_REVERB_DEFAULT_ROOM_SIZE
};
public ReverbEffect(AudioDevice audioDevice, uint processingStage) : base(audioDevice, 1, audioDevice.DeviceDetails.OutputFormat.Format.nSamplesPerSec, processingStage)
{
/* Init reverb */
IntPtr reverb;
FAudio.FAudioCreateReverb(out reverb, 0);
var chain = new FAudio.FAudioEffectChain();
var descriptor = new FAudio.FAudioEffectDescriptor
{
InitialState = 1,
OutputChannels = 1,
pEffect = reverb
};
chain.EffectCount = 1;
chain.pEffectDescriptors = (nint) (&descriptor);
FAudio.FAudioVoice_SetEffectChain(
Handle,
ref chain
);
FAudio.FAPOBase_Release(reverb);
SetParams(DefaultParams);
}
public void SetParams(in FAudio.FAudioFXReverbParameters reverbParams)
{
fixed (FAudio.FAudioFXReverbParameters* reverbParamsPtr = &reverbParams)
{
FAudio.FAudioVoice_SetEffectParameters(
Handle,
0,
(nint) reverbParamsPtr,
(uint) Marshal.SizeOf<FAudio.FAudioFXReverbParameters>(),
0
);
}
}
}
}