public unsafe void AttachReverb(IntPtr voice)
{
// Only create a reverb voice if they ask for it!
if (ReverbVoice == IntPtr.Zero)
{
IntPtr reverb;
FAudio.FAudioCreateReverb(out reverb, 0);
IntPtr chainPtr;
chainPtr = Marshal.AllocHGlobal(
Marshal.SizeOf(typeof(FAudio.FAudioEffectChain))
);
FAudio.FAudioEffectChain *reverbChain = (FAudio.FAudioEffectChain *)chainPtr;
reverbChain->EffectCount = 1;
reverbChain->pEffectDescriptors = Marshal.AllocHGlobal(
Marshal.SizeOf(typeof(FAudio.FAudioEffectDescriptor))
);
FAudio.FAudioEffectDescriptor *reverbDesc =
(FAudio.FAudioEffectDescriptor *)reverbChain->pEffectDescriptors;
reverbDesc->InitialState = 1;
reverbDesc->OutputChannels = (uint)(
(DeviceDetails.OutputFormat.Format.nChannels == 6) ? 6 : 1
);
reverbDesc->pEffect = reverb;
FAudio.FAudio_CreateSubmixVoice(
Handle,
out ReverbVoice,
1, /* Reverb will be omnidirectional */
DeviceDetails.OutputFormat.Format.nSamplesPerSec,
0,
0,
IntPtr.Zero,
chainPtr
);
FAudio.FAPOBase_Release(reverb);
Marshal.FreeHGlobal(reverbChain->pEffectDescriptors);
Marshal.FreeHGlobal(chainPtr);
// Defaults based on FAUDIOFX_I3DL2_PRESET_GENERIC
IntPtr rvbParamsPtr = Marshal.AllocHGlobal(
Marshal.SizeOf(typeof(FAudio.FAudioFXReverbParameters))
);
FAudio.FAudioFXReverbParameters *rvbParams = (FAudio.FAudioFXReverbParameters *)rvbParamsPtr;
rvbParams->WetDryMix = 100.0f;
rvbParams->ReflectionsDelay = 7;
rvbParams->ReverbDelay = 11;
rvbParams->RearDelay = FAudio.FAUDIOFX_REVERB_DEFAULT_REAR_DELAY;
rvbParams->PositionLeft = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION;
rvbParams->PositionRight = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION;
rvbParams->PositionMatrixLeft = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION_MATRIX;
rvbParams->PositionMatrixRight = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION_MATRIX;
rvbParams->EarlyDiffusion = 15;
rvbParams->LateDiffusion = 15;
rvbParams->LowEQGain = 8;
rvbParams->LowEQCutoff = 4;
rvbParams->HighEQGain = 8;
rvbParams->HighEQCutoff = 6;
rvbParams->RoomFilterFreq = 5000f;
rvbParams->RoomFilterMain = -10f;
rvbParams->RoomFilterHF = -1f;
rvbParams->ReflectionsGain = -26.0200005f;
rvbParams->ReverbGain = 10.0f;
rvbParams->DecayTime = 1.49000001f;
rvbParams->Density = 100.0f;
rvbParams->RoomSize = FAudio.FAUDIOFX_REVERB_DEFAULT_ROOM_SIZE;
FAudio.FAudioVoice_SetEffectParameters(
ReverbVoice,
0,
rvbParamsPtr,
(uint)Marshal.SizeOf(typeof(FAudio.FAudioFXReverbParameters)),
0
);
Marshal.FreeHGlobal(rvbParamsPtr);
reverbSends = new FAudio.FAudioVoiceSends();
reverbSends.SendCount = 2;
reverbSends.pSends = Marshal.AllocHGlobal(
2 * Marshal.SizeOf(typeof(FAudio.FAudioSendDescriptor))
);
FAudio.FAudioSendDescriptor *sendDesc = (FAudio.FAudioSendDescriptor *)reverbSends.pSends;
sendDesc[0].Flags = 0;
sendDesc[0].pOutputVoice = MasterVoice;
sendDesc[1].Flags = 0;
sendDesc[1].pOutputVoice = ReverbVoice;
}
// Oh hey here's where we actually attach it
FAudio.FAudioVoice_SetOutputVoices(
voice,
ref reverbSends
);
}