104 lines
3.0 KiB
C#
104 lines
3.0 KiB
C#
using System;
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using System.Runtime.InteropServices;
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namespace MoonWorks.Audio
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{
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// sound instances can send their audio to this voice to add reverb
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public unsafe class ReverbEffect : AudioResource
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{
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private IntPtr voice;
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public IntPtr Voice => voice;
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public ReverbEffect(AudioDevice audioDevice) : base(audioDevice)
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{
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/* Init reverb */
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IntPtr reverb;
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FAudio.FAudioCreateReverb(out reverb, 0);
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IntPtr chainPtr;
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chainPtr = (nint) NativeMemory.Alloc(
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(nuint) Marshal.SizeOf<FAudio.FAudioEffectChain>()
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);
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FAudio.FAudioEffectChain* reverbChain = (FAudio.FAudioEffectChain*) chainPtr;
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reverbChain->EffectCount = 1;
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reverbChain->pEffectDescriptors = (nint) NativeMemory.Alloc(
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(nuint) Marshal.SizeOf<FAudio.FAudioEffectDescriptor>()
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);
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FAudio.FAudioEffectDescriptor* reverbDescriptor =
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(FAudio.FAudioEffectDescriptor*) reverbChain->pEffectDescriptors;
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reverbDescriptor->InitialState = 1;
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reverbDescriptor->OutputChannels = (uint) (
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(audioDevice.DeviceDetails.OutputFormat.Format.nChannels == 6) ? 6 : 1
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);
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reverbDescriptor->pEffect = reverb;
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FAudio.FAudio_CreateSubmixVoice(
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audioDevice.Handle,
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out voice,
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1, /* omnidirectional reverb */
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audioDevice.DeviceDetails.OutputFormat.Format.nSamplesPerSec,
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0,
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0,
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IntPtr.Zero,
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chainPtr
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);
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FAudio.FAPOBase_Release(reverb);
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NativeMemory.Free((void*) reverbChain->pEffectDescriptors);
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NativeMemory.Free((void*) chainPtr);
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/* Init reverb params */
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// Defaults based on FAUDIOFX_I3DL2_PRESET_GENERIC
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FAudio.FAudioFXReverbParameters reverbParams;
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reverbParams.WetDryMix = 100.0f;
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reverbParams.ReflectionsDelay = 7;
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reverbParams.ReverbDelay = 11;
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reverbParams.RearDelay = FAudio.FAUDIOFX_REVERB_DEFAULT_REAR_DELAY;
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reverbParams.PositionLeft = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION;
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reverbParams.PositionRight = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION;
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reverbParams.PositionMatrixLeft = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION_MATRIX;
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reverbParams.PositionMatrixRight = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION_MATRIX;
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reverbParams.EarlyDiffusion = 15;
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reverbParams.LateDiffusion = 15;
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reverbParams.LowEQGain = 8;
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reverbParams.LowEQCutoff = 4;
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reverbParams.HighEQGain = 8;
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reverbParams.HighEQCutoff = 6;
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reverbParams.RoomFilterFreq = 5000f;
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reverbParams.RoomFilterMain = -10f;
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reverbParams.RoomFilterHF = -1f;
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reverbParams.ReflectionsGain = -26.0200005f;
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reverbParams.ReverbGain = 10.0f;
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reverbParams.DecayTime = 1.49000001f;
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reverbParams.Density = 100.0f;
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reverbParams.RoomSize = FAudio.FAUDIOFX_REVERB_DEFAULT_ROOM_SIZE;
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SetParams(reverbParams);
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}
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public void SetParams(in FAudio.FAudioFXReverbParameters reverbParams)
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{
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fixed (FAudio.FAudioFXReverbParameters* reverbParamsPtr = &reverbParams)
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{
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FAudio.FAudioVoice_SetEffectParameters(
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voice,
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0,
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(nint) reverbParamsPtr,
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(uint) Marshal.SizeOf<FAudio.FAudioFXReverbParameters>(),
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0
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);
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}
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}
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protected override void Destroy()
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{
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FAudio.FAudioVoice_DestroyVoice(Voice);
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}
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}
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}
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