[wdmaudiodev] Re: USB midi driver?
- From: Waldemar Haszlakiewicz <waldemar.haszlakiewicz@xxxxxxxx>
- To: Jeff Pages <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 24 Nov 2004 11:32:34 +0100
JP> I have a similar problem with multiple PCI wave input devices. Each device
is identical,
JP> but they are physically connected to different audio sources and it is
important for the
JP> application to be able to distinguish them reliably and consistently across
reboots. I still
JP> don't have a really satisfactory solution to this.
This should solve your problem(AVStream driver type):
NTSTATUS card_c::RegisterChannelsToSystem_Wave
(
)
{
#ifdef DBG_AND_LOGGER
Procedure_Start_Local( "card_c::RegisterChannelsToSystem_Wave" );
#endif
NTSTATUS Status = STATUS_UNSUCCESSFUL;
WCHAR buffer_friendlyName[64];
WCHAR buffer_interfaceName[32];
unsigned long cardType;
unsigned long i;
unsigned long j;
KSFILTER_DESCRIPTOR* pFilterDescriptor;
unsigned long serialNumber;
//Define card type.
if ( type == CARD_TYPE_424 )
{
cardType = 424;
pFilterDescriptor = (KSFILTER_DESCRIPTOR*)
&FilterDescriptor_Wave96;
}
else if ( type == CARD_TYPE_496 )
{
cardType = 496;
pFilterDescriptor = (KSFILTER_DESCRIPTOR*)
&FilterDescriptor_Wave96;
}
else
{
cardType = 824;
pFilterDescriptor = (KSFILTER_DESCRIPTOR*)
&FilterDescriptor_Wave48;
}
//Get card serial number.
for ( serialNumber = 0; serialNumber < WAVE8_MAX_CARDS; serialNumber++ )
{
//Check for empty space.
if ( glClass.cards[serialNumber] == NULL )
{
//We found an empty space.
Status = STATUS_SUCCESS;
break;
}
}
//Define filters.
if ( SUCCESS( Status ) )
{
//Convert serialNumber to 1 based number.
++serialNumber;
//Register channels.
for ( i = 0; i < numberOfStereoChannels; i++ )
{
//Convert stereo to mono (channel numbers) and convert
//to 1 based number.
j = i*2 + 1;
//Create strings.
swprintf(
buffer_friendlyName,
L"WavePro%d(%d) ch. %d-%d",
cardType,
serialNumber,
j,
j+1
);
swprintf(
buffer_interfaceName,
L"GLI%d(%d) %d-%d",
cardType,
serialNumber,
j,
j+1
);
//Register filter interface.
Status = RegisterFilterInterface(
buffer_interfaceName,
buffer_friendlyName
);
//Register filter to system.
if ( SUCCESS( Status ) )
{
Status = KsCreateFilterFactory(
cardDeviceObject->FunctionalDeviceObject,
pFilterDescriptor,
buffer_interfaceName,
NULL,
0,
NULL,
NULL,
&pFilterFactories[i]
);
}
if ( Status != STATUS_SUCCESS )
{
break;
}
}
}
#ifdef DBG_AND_LOGGER
Procedure_Exit( "card_c::RegisterChannelsToSystem_Wave", Status );
#endif
return Status;
}
NTSTATUS card_c::UnregisterChannelsFromSystem_Wave
(
)
{
#ifdef DBG_AND_LOGGER
Procedure_Start_Local( "card_c::UnregisterChannelsFromSystem_Wave" );
#endif
NTSTATUS Status = STATUS_UNSUCCESSFUL;
WCHAR buffer_interfaceName[32];
unsigned long cardType;
unsigned long i;
unsigned long j;
unsigned long serialNumber;
//Define card type.
if ( type == CARD_TYPE_424 )
{
cardType = 424;
}
else if ( type == CARD_TYPE_496 )
{
cardType = 496;
}
else
{
cardType = 824;
}
//Get serialNumber.
//Be carefull as this procedure can be called even if card failed to install.
for ( serialNumber = 0; serialNumber < WAVE8_MAX_CARDS; serialNumber++ )
{
//Check if the card was installed.
if ( glClass.cards[serialNumber] == this )
{
//We found it.
Status = STATUS_SUCCESS;
break;
}
}
if ( Status != STATUS_SUCCESS )
{
//Card wasn't installed -> find first empty space.
for ( serialNumber = 0; serialNumber < WAVE8_MAX_CARDS;
serialNumber++ )
{
if ( glClass.cards[serialNumber] == NULL )
{
//We found it.
Status = STATUS_SUCCESS;
break;
}
}
}
//Define filters.
if ( SUCCESS( Status ) )
{
//Convert serialNumber to 1 based number.
++serialNumber;
//Unregister.
for ( i = 0; i < numberOfStereoChannels; i++ )
{
if ( pFilterFactories[i] == NULL )
{
//There are no more pFilterFactories after 1st NULL.
break;
}
//Convert stereo to mono (channel numbers) and convert
//to 1 based number.
j = i*2 + 1;
//Create strings.
swprintf(
buffer_interfaceName,
L"GLI%d(%d) %d-%d",
cardType,
serialNumber,
j,
j+1
);
//Disable filter factory.
DisableFilterInterface( buffer_interfaceName );
//Release filter factories
KsDeleteFilterFactory( pFilterFactories[i] );
pFilterFactories[i] = NULL;
}
}
#ifdef DBG_AND_LOGGER
Procedure_Exit( "card_c::UnregisterChannelsFromSystem_Wave", Status );
#endif
return Status;
}
UNICODE_STRING FriendlyName_USTR =
{
sizeof( FRIENDLY_NAME ),
sizeof( FRIENDLY_NAME ),
&FRIENDLY_NAME
};
UNICODE_STRING CLSID_USTR =
{
sizeof( sCLSID ),
sizeof( sCLSID ),
&sCLSID
};
NTSTATUS card_c::RegisterFilterInterface
(
IN PWCHAR interfaceName,
IN PWCHAR friendlyName
)
{
#ifdef DBG_AND_LOGGER
Procedure_Start_Local( "card_c::RegisterFilterInterface" );
#endif
NTSTATUS Status;
HANDLE hKey_interface = 0;
GUID* interfaceClassGuid;
UNICODE_STRING referenceName;
UNICODE_STRING symbolicLinkName;
//Convert PWCHAR to UNICODE_STRING.
RtlInitUnicodeString( &referenceName, interfaceName );
//Register interface and set it's registry values.
for ( int i = 0; i< 3; i++ )
{
//Get class GUID.
switch ( i )
{
case 0 :
interfaceClassGuid = (GUID*) &KSCATEGORY_AUDIO;
break;
case 1 :
interfaceClassGuid = (GUID*) &KSCATEGORY_RENDER;
break;
case 2 :
interfaceClassGuid = (GUID*) &KSCATEGORY_CAPTURE;
break;
default:;
}
//Register Interface
Status = IoRegisterDeviceInterface(
cardDeviceObject->PhysicalDeviceObject,
interfaceClassGuid,
&referenceName,
&symbolicLinkName
);
//Set CLSID and FriendlyName interface values.
if ( SUCCESS( Status ) )
{
//Open interface registry handle.
Status = IoOpenDeviceInterfaceRegistryKey(
&symbolicLinkName,
KEY_WRITE,
&hKey_interface
);
//Set registry values.
if ( SUCCESS( Status ) )
{
//Set CLSID value.
Status = ZwSetValueKey(
hKey_interface,
&CLSID_USTR,
0,
REG_SZ,
&guid_CLSID_Value_W,
sizeof( guid_CLSID_Value_W ) + sizeof( WCHAR )
);
//Set FriendlyName value.
if ( SUCCESS( Status ) )
{
Status = ZwSetValueKey(
hKey_interface,
&FriendlyName_USTR,
0,
REG_SZ,
friendlyName,
( wcslen( friendlyName ) + 1
)*sizeof( WCHAR )
);
}
//Release resources
ZwClose( hKey_interface );
}
if ( SUCCESS( Status ) )
{
//Enable interface.
Status = IoSetDeviceInterfaceState(
&symbolicLinkName,
TRUE
);
}
//Release resources
RtlFreeUnicodeString( &symbolicLinkName );
}
//Failed?
if ( Status != STATUS_SUCCESS )
{
break;
}
}
#ifdef DBG_AND_LOGGER
Procedure_Exit( "card_c::RegisterFilterInterface", Status );
#endif
return Status;
}
NTSTATUS card_c::DisableFilterInterface
(
IN PWCHAR interfaceName
)
{
#ifdef DBG_AND_LOGGER
Procedure_Start_Local( "card_c::DisableFilterInterface" );
#endif
NTSTATUS Status;
HANDLE hKey_interface = 0;
GUID* interfaceClassGuid;
UNICODE_STRING referenceName;
UNICODE_STRING symbolicLinkName;
//Convert PWCHAR to UNICODE_STRING.
RtlInitUnicodeString( &referenceName, interfaceName );
//Register interface and set it's registry values.
for ( int i = 0; i< 3; i++ )
{
//Get class GUID.
switch ( i )
{
case 0 :
interfaceClassGuid = (GUID*) &KSCATEGORY_AUDIO;
break;
case 1 :
interfaceClassGuid = (GUID*) &KSCATEGORY_RENDER;
break;
case 2 :
interfaceClassGuid = (GUID*) &KSCATEGORY_CAPTURE;
break;
default:;
}
//Get Interface
Status = IoRegisterDeviceInterface(
cardDeviceObject->PhysicalDeviceObject,
interfaceClassGuid,
&referenceName,
&symbolicLinkName
);
if ( SUCCESS( Status ) )
{
//Disable interface->we don't want that system will link
//the interface to our driver when is not present anymore.
Status = IoSetDeviceInterfaceState(
&symbolicLinkName,
FALSE
);
//Release resources
RtlFreeUnicodeString( &symbolicLinkName );
}
}
#ifdef DBG_AND_LOGGER
Procedure_Exit( "card_c::DisableFilterInterface", Status );
#endif
return Status;
}
******************
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