Hi,
I am trying to send audio to Skype from virtual mic, using SYSVAD example. At
the moment I can successfully send audio to any voip program from mic wxcept
skype. When I start skype call, music gets muted to silence and white noise
intensifies. If I listen to mic directly, sound is still coming and it sounds
perfectly, but skype still removes it (maybe it things it’s noise). I’ve found
this document: https://www.microsoft.com/en-us/download/details.aspx?id=42523, ;
in which they say, that if driver doesn’t implement NS and AEC, skype adds
them. I think these two effects destroys my sound, so I want to say to skype,
that I already applied these effects to RAW mic data. For validating effects, I
am using this program
https://code.msdn.microsoft.com/windowsapps/Audio-effects-discovery-5fd65c15.
In minwavert.cpp I added this function:
NTSTATUS
CMiniportWaveRT::PropertyHandler_MicAudioEffectsDiscoveryEffectsList
(
_In_ PPCPROPERTY_REQUEST PropertyRequest
)
/*++
Routine Description:
Handles (
KSPROPSETID_AudioEffectsDiscovery,KSPROPERTY_AUDIOEFFECTSDISCOVERY_EFFECTSLIST )
Arguments:
PropertyRequest -
Return Value:
NT status code.
--*/
{
PAGED_CODE();
DPF_ENTER(("[PropertyHandler_MicAudioEffectsDiscoveryEffectsList]"));
NTSTATUS ntStatus = STATUS_INVALID_PARAMETER;
ULONG nPinId = (ULONG)-1;
//
// Validate Pin ID.
//
if (PropertyRequest->InstanceSize >= sizeof(ULONG))
{
nPinId = *(PULONG(PropertyRequest->Instance));
// This prop is valid only on streaming pins.
if (IsSystemRenderPin(nPinId) ||
IsSystemCapturePin(nPinId))
{
ntStatus = STATUS_SUCCESS;
}
else if (IsBridgePin(nPinId) ||
IsLoopbackPin(nPinId) ||
IsOffloadPin(nPinId))
{
ntStatus = STATUS_NOT_SUPPORTED;
}
}
IF_FAILED_JUMP(ntStatus, Done);
//
// Valid actions: get and basicsupport.
//
ntStatus = STATUS_INVALID_PARAMETER;
if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
{
ntStatus =
PropertyHandler_BasicSupport
(
PropertyRequest,
KSPROPERTY_TYPE_BASICSUPPORT | KSPROPERTY_TYPE_GET,
VT_ILLEGAL
);
}
else if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
{
//ASSERT(m_BthHfpDevice != NULL);
//
// bHfpNrecPresent is set to TRUE when the HF
(remote device) handles NR + EC.
// Note that GetNRECDisableStatus() returns
TRUE if the HF notified the AG to disable
// the NR + EC locally.
//
//BOOL bHfpNrecPresent =
m_BthHfpDevice->IsNRECSupported() && m_BthHfpDevice->GetNRECDisableStatus();
// If it is HFP render pin (data flow in) or if
the NR-EC is not supported,
// return size 0 effect list
if (IsSystemRenderPin(nPinId)) //||
!bHfpNrecPresent)
{
PropertyRequest->ValueSize = 0;
ntStatus = STATUS_SUCCESS;
}
else
{
// Compute total size, two
effects: NS and EC (see below).
ULONG cbMinSize =
sizeof(GUID) * 2;
if (PropertyRequest->ValueSize
== 0)
{
PropertyRequest->ValueSize = cbMinSize;
ntStatus =
STATUS_BUFFER_OVERFLOW;
}
else if
(PropertyRequest->ValueSize < cbMinSize)
{
ntStatus =
STATUS_BUFFER_TOO_SMALL;
}
else
{
PGUID
effectList = PGUID(PropertyRequest->Value);
*effectList =
AUDIO_EFFECT_TYPE_ACOUSTIC_ECHO_CANCELLATION;
*(effectList +
1) = AUDIO_EFFECT_TYPE_NOISE_SUPPRESSION;
PropertyRequest->ValueSize = cbMinSize;
ntStatus =
STATUS_SUCCESS;
}
}
}
Done:
return ntStatus;
}
In minwavert.cpp in PropertyHandler_WaveFilter I added:
else if (IsEqualGUIDAligned(*PropertyRequest->PropertyItem->Set,
KSPROPSETID_AudioEffectsDiscovery))
{
DbgBreakPoint();
switch (PropertyRequest->PropertyItem->Id)
{
case
KSPROPERTY_AUDIOEFFECTSDISCOVERY_EFFECTSLIST:
ntStatus =
pWaveHelper->PropertyHandler_MicAudioEffectsDiscoveryEffectsList(PropertyRequest);
break;
}
}
And in micinwavtable.h, in PropertiesMicInWaveFiler[], I added:
…
,
{
&KSPROPSETID_AudioEffectsDiscovery,
KSPROPERTY_AUDIOEFFECTSDISCOVERY_EFFECTSLIST,
KSPROPERTY_TYPE_GET |
KSPROPERTY_TYPE_BASICSUPPORT,
PropertyHandler_WaveFilter
},
…
What I am missing? AEC and NS effects doesn’t show up in sample Effect program.
Also PropertyHandler_MicAudioEffectsDiscoveryEffectsList function never is
called. How could I say to skype, that I applied these effects myself, so that
skype doesn’t degrade audio to noise. Thanks in advance.
