2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS Kernel Streaming
4 * FILE: drivers/wdm/audio/legacy/wdmaud/deviface.c
5 * PURPOSE: System Audio graph builder
6 * PROGRAMMER: Andrew Greenwood
11 const GUID KSPROPSETID_Pin
= {0x8C134960L
, 0x51AD, 0x11CF, {0x87, 0x8A, 0x94, 0xF8, 0x01, 0xC1, 0x00, 0x00}};
12 const GUID KSPROPSETID_Connection
= {0x1D58C920L
, 0xAC9B, 0x11CF, {0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00}};
13 const GUID KSPROPSETID_Sysaudio
= {0xCBE3FAA0L
, 0xCC75, 0x11D0, {0xB4, 0x65, 0x00, 0x00, 0x1A, 0x18, 0x18, 0xE6}};
14 const GUID KSPROPSETID_General
= {0x1464EDA5L
, 0x6A8F, 0x11D1, {0x9A, 0xA7, 0x00, 0xA0, 0xC9, 0x22, 0x31, 0x96}};
15 const GUID KSINTERFACESETID_Standard
= {0x1A8766A0L
, 0x62CE, 0x11CF, {0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00}};
16 const GUID KSMEDIUMSETID_Standard
= {0x4747B320L
, 0x62CE, 0x11CF, {0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00}};
17 const GUID KSDATAFORMAT_TYPE_AUDIO
= {0x73647561L
, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
18 const GUID KSDATAFORMAT_SUBTYPE_PCM
= {0x00000001L
, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
19 const GUID KSDATAFORMAT_SPECIFIER_WAVEFORMATEX
= {0x05589f81L
, 0xc356, 0x11ce, {0xbf, 0x01, 0x00, 0xaa, 0x00, 0x55, 0x59, 0x5a}};
20 const GUID KSPROPSETID_Topology
= {0x720D4AC0L
, 0x7533, 0x11D0, {0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00}};
28 Irp
->IoStatus
.Information
= Length
;
29 Irp
->IoStatus
.Status
= Status
;
30 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
37 IN PDEVICE_OBJECT DeviceObject
,
38 IN PWDMAUD_DEVICE_INFO DeviceInfo
,
39 IN PWDMAUD_CLIENT ClientInfo
,
44 ULONG Count
, BytesReturned
, Index
, SubIndex
, Result
, NumPins
;
46 KSPIN_COMMUNICATION Communication
;
47 KSPIN_DATAFLOW DataFlow
;
48 PWDMAUD_DEVICE_EXTENSION DeviceExtension
;
50 if (DeviceInfo
->DeviceType
!= WAVE_OUT_DEVICE_TYPE
&& DeviceInfo
->DeviceType
!= WAVE_IN_DEVICE_TYPE
)
52 DPRINT1("FIXME: Unsupported device type %x\n", DeviceInfo
->DeviceType
);
53 return STATUS_UNSUCCESSFUL
;
56 Pin
.Property
.Set
= KSPROPSETID_Sysaudio
;
57 Pin
.Property
.Id
= KSPROPERTY_SYSAUDIO_DEVICE_COUNT
;
58 Pin
.Property
.Flags
= KSPROPERTY_TYPE_GET
;
60 DeviceExtension
= (PWDMAUD_DEVICE_EXTENSION
)DeviceObject
->DeviceExtension
;
62 Status
= KsSynchronousIoControlDevice(DeviceExtension
->FileObject
, KernelMode
, IOCTL_KS_PROPERTY
, (PVOID
)&Pin
, sizeof(KSPROPERTY
), (PVOID
)&Count
, sizeof(ULONG
), &BytesReturned
);
63 if (!NT_SUCCESS(Status
))
64 return STATUS_UNSUCCESSFUL
;
67 for(Index
= 0; Index
< Count
; Index
++)
69 /* query number of pins */
70 Pin
.Reserved
= Index
; // see sysaudio
71 Pin
.Property
.Flags
= KSPROPERTY_TYPE_GET
;
72 Pin
.Property
.Set
= KSPROPSETID_Pin
;
73 Pin
.Property
.Id
= KSPROPERTY_PIN_CTYPES
;
76 Status
= KsSynchronousIoControlDevice(DeviceExtension
->FileObject
, KernelMode
, IOCTL_KS_PROPERTY
, (PVOID
)&Pin
, sizeof(KSP_PIN
), (PVOID
)&NumPins
, sizeof(ULONG
), &BytesReturned
);
77 if (NT_SUCCESS(Status
))
79 /* enumerate now all pins */
80 for(SubIndex
= 0; SubIndex
< NumPins
; SubIndex
++)
83 Pin
.Property
.Id
= KSPROPERTY_PIN_COMMUNICATION
;
84 Communication
= KSPIN_COMMUNICATION_NONE
;
86 /* get pin communication type */
87 KsSynchronousIoControlDevice(DeviceExtension
->FileObject
, KernelMode
, IOCTL_KS_PROPERTY
, (PVOID
)&Pin
, sizeof(KSP_PIN
), (PVOID
)&Communication
, sizeof(KSPIN_COMMUNICATION
), &BytesReturned
);
89 Pin
.Property
.Id
= KSPROPERTY_PIN_DATAFLOW
;
92 /* get pin dataflow type */
93 KsSynchronousIoControlDevice(DeviceExtension
->FileObject
, KernelMode
, IOCTL_KS_PROPERTY
, (PVOID
)&Pin
, sizeof(KSP_PIN
), (PVOID
)&DataFlow
, sizeof(KSPIN_DATAFLOW
), &BytesReturned
);
95 if (DeviceInfo
->DeviceType
== WAVE_OUT_DEVICE_TYPE
)
97 if (Communication
== KSPIN_COMMUNICATION_SINK
&& DataFlow
== KSPIN_DATAFLOW_IN
)
99 if(DeviceInfo
->DeviceIndex
== Result
)
101 /* found the index */
104 return STATUS_SUCCESS
;
110 else if (DeviceInfo
->DeviceType
== WAVE_IN_DEVICE_TYPE
)
112 if (Communication
== KSPIN_COMMUNICATION_SINK
&& DataFlow
== KSPIN_DATAFLOW_OUT
)
114 if(DeviceInfo
->DeviceIndex
== Result
)
116 /* found the index */
119 return STATUS_SUCCESS
;
128 return STATUS_UNSUCCESSFUL
;
133 IN PDEVICE_OBJECT DeviceObject
,
135 IN PWDMAUD_DEVICE_INFO DeviceInfo
,
136 IN PWDMAUD_CLIENT ClientInfo
)
138 SYSAUDIO_INSTANCE_INFO InstanceInfo
;
139 PWDMAUD_DEVICE_EXTENSION DeviceExtension
;
142 ACCESS_MASK DesiredAccess
= 0;
144 KSPIN_CONNECT
* PinConnect
;
146 KSDATAFORMAT_WAVEFORMATEX
* DataFormat
;
151 if (DeviceInfo
->DeviceType
== MIXER_DEVICE_TYPE
)
153 return WdmAudControlOpenMixer(DeviceObject
, Irp
, DeviceInfo
, ClientInfo
);
156 if (DeviceInfo
->DeviceType
!= WAVE_OUT_DEVICE_TYPE
&& DeviceInfo
->DeviceType
!= WAVE_IN_DEVICE_TYPE
)
158 DPRINT1("FIXME: only waveout / wavein devices are supported\n");
159 return SetIrpIoStatus(Irp
, STATUS_UNSUCCESSFUL
, 0);
162 if (DeviceInfo
->u
.WaveFormatEx
.wFormatTag
!= WAVE_FORMAT_PCM
)
164 DPRINT("FIXME: Only WAVE_FORMAT_PCM is supported RequestFormat %x\n", DeviceInfo
->u
.WaveFormatEx
.wFormatTag
);
165 return SetIrpIoStatus(Irp
, STATUS_UNSUCCESSFUL
, 0);
168 Status
= GetFilterIdAndPinId(DeviceObject
, DeviceInfo
, ClientInfo
, &FilterId
, &PinId
);
169 if (!NT_SUCCESS(Status
))
171 DPRINT1("Invalid device index %u\n", DeviceInfo
->DeviceIndex
);
172 return SetIrpIoStatus(Irp
, STATUS_UNSUCCESSFUL
, 0);
175 /* close pin handle which uses same virtual audio device id and pin id */
176 FreeIndex
= (ULONG
)-1;
177 for(Index
= 0; Index
< ClientInfo
->NumPins
; Index
++)
179 if (ClientInfo
->hPins
[Index
].FilterId
== FilterId
&& ClientInfo
->hPins
[Index
].PinId
== PinId
&& ClientInfo
->hPins
[Index
].Handle
&& ClientInfo
->hPins
[Index
].Type
== DeviceInfo
->DeviceType
)
181 ZwClose(ClientInfo
->hPins
[Index
].Handle
);
182 ClientInfo
->hPins
[Index
].Handle
= NULL
;
188 Length
= sizeof(KSDATAFORMAT_WAVEFORMATEX
) + sizeof(KSPIN_CONNECT
);
189 PinConnect
= ExAllocatePool(NonPagedPool
, Length
);
193 return SetIrpIoStatus(Irp
, STATUS_NO_MEMORY
, 0);
196 DeviceExtension
= (PWDMAUD_DEVICE_EXTENSION
)DeviceObject
->DeviceExtension
;
198 if (DeviceInfo
->DeviceType
== WAVE_IN_DEVICE_TYPE
||
199 DeviceInfo
->DeviceType
== MIDI_IN_DEVICE_TYPE
||
200 DeviceInfo
->DeviceType
== MIXER_DEVICE_TYPE
)
202 DesiredAccess
|= GENERIC_READ
;
205 if (DeviceInfo
->DeviceType
== WAVE_OUT_DEVICE_TYPE
||
206 DeviceInfo
->DeviceType
== MIDI_OUT_DEVICE_TYPE
||
207 DeviceInfo
->DeviceType
== AUX_DEVICE_TYPE
||
208 DeviceInfo
->DeviceType
== MIXER_DEVICE_TYPE
)
210 DesiredAccess
|= GENERIC_WRITE
;
213 PinConnect
->Interface
.Set
= KSINTERFACESETID_Standard
;
214 PinConnect
->Interface
.Id
= KSINTERFACE_STANDARD_STREAMING
;
215 PinConnect
->Interface
.Flags
= 0;
216 PinConnect
->Medium
.Set
= KSMEDIUMSETID_Standard
;
217 PinConnect
->Medium
.Id
= KSMEDIUM_TYPE_ANYINSTANCE
;
218 PinConnect
->Medium
.Flags
= 0;
219 PinConnect
->PinToHandle
= NULL
;
220 PinConnect
->PinId
= PinId
;
221 PinConnect
->Priority
.PriorityClass
= KSPRIORITY_NORMAL
;
222 PinConnect
->Priority
.PrioritySubClass
= 1;
225 DataFormat
= (KSDATAFORMAT_WAVEFORMATEX
*) (PinConnect
+ 1);
226 DataFormat
->WaveFormatEx
.wFormatTag
= DeviceInfo
->u
.WaveFormatEx
.wFormatTag
;
227 DataFormat
->WaveFormatEx
.nChannels
= DeviceInfo
->u
.WaveFormatEx
.nChannels
;
228 DataFormat
->WaveFormatEx
.nSamplesPerSec
= DeviceInfo
->u
.WaveFormatEx
.nSamplesPerSec
;
229 DataFormat
->WaveFormatEx
.nBlockAlign
= DeviceInfo
->u
.WaveFormatEx
.nBlockAlign
;
230 DataFormat
->WaveFormatEx
.nAvgBytesPerSec
= DeviceInfo
->u
.WaveFormatEx
.nAvgBytesPerSec
;
231 DataFormat
->WaveFormatEx
.wBitsPerSample
= DeviceInfo
->u
.WaveFormatEx
.wBitsPerSample
;
232 DataFormat
->WaveFormatEx
.cbSize
= 0;
233 DataFormat
->DataFormat
.FormatSize
= sizeof(KSDATAFORMAT
) + sizeof(WAVEFORMATEX
);
234 DataFormat
->DataFormat
.Flags
= 0;
235 DataFormat
->DataFormat
.Reserved
= 0;
236 DataFormat
->DataFormat
.MajorFormat
= KSDATAFORMAT_TYPE_AUDIO
;
238 DataFormat
->DataFormat
.SubFormat
= KSDATAFORMAT_SUBTYPE_PCM
;
239 DataFormat
->DataFormat
.Specifier
= KSDATAFORMAT_SPECIFIER_WAVEFORMATEX
;
240 DataFormat
->DataFormat
.SampleSize
= 4;
242 /* setup property request */
243 InstanceInfo
.Property
.Set
= KSPROPSETID_Sysaudio
;
244 InstanceInfo
.Property
.Id
= KSPROPERTY_SYSAUDIO_INSTANCE_INFO
;
245 InstanceInfo
.Property
.Flags
= KSPROPERTY_TYPE_SET
;
246 InstanceInfo
.Flags
= 0;
247 InstanceInfo
.DeviceNumber
= FilterId
;
249 /* first open the virtual device */
250 Status
= KsSynchronousIoControlDevice(DeviceExtension
->FileObject
, KernelMode
, IOCTL_KS_PROPERTY
, (PVOID
)&InstanceInfo
, sizeof(SYSAUDIO_INSTANCE_INFO
), NULL
, 0, &BytesReturned
);
252 if (!NT_SUCCESS(Status
))
255 ExFreePool(PinConnect
);
256 return SetIrpIoStatus(Irp
, Status
, sizeof(WDMAUD_DEVICE_INFO
));
259 /* now create the pin */
260 Status
= KsCreatePin(DeviceExtension
->hSysAudio
, PinConnect
, DesiredAccess
, &PinHandle
);
262 /* free create info */
263 ExFreePool(PinConnect
);
265 if (NT_SUCCESS(Status
))
267 PWDMAUD_HANDLE Handels
;
269 if (FreeIndex
!= (ULONG
)-1)
271 /* re-use a free index */
272 ClientInfo
->hPins
[Index
].Handle
= PinHandle
;
273 ClientInfo
->hPins
[Index
].FilterId
= FilterId
;
274 ClientInfo
->hPins
[Index
].PinId
= PinId
;
275 ClientInfo
->hPins
[Index
].Type
= DeviceInfo
->DeviceType
;
277 DeviceInfo
->hDevice
= PinHandle
;
278 return SetIrpIoStatus(Irp
, Status
, sizeof(WDMAUD_DEVICE_INFO
));
281 Handels
= ExAllocatePool(NonPagedPool
, sizeof(WDMAUD_HANDLE
) * (ClientInfo
->NumPins
+1));
285 if (ClientInfo
->NumPins
)
287 RtlMoveMemory(Handels
, ClientInfo
->hPins
, sizeof(WDMAUD_HANDLE
) * ClientInfo
->NumPins
);
288 ExFreePool(ClientInfo
->hPins
);
291 ClientInfo
->hPins
= Handels
;
292 ClientInfo
->hPins
[ClientInfo
->NumPins
].Handle
= PinHandle
;
293 ClientInfo
->hPins
[ClientInfo
->NumPins
].Type
= DeviceInfo
->DeviceType
;
294 ClientInfo
->hPins
[ClientInfo
->NumPins
].FilterId
= FilterId
;
295 ClientInfo
->hPins
[ClientInfo
->NumPins
].PinId
= PinId
;
296 ClientInfo
->NumPins
++;
298 DeviceInfo
->hDevice
= PinHandle
;
302 DeviceInfo
->hDevice
= NULL
;
305 return SetIrpIoStatus(Irp
, Status
, sizeof(WDMAUD_DEVICE_INFO
));
309 WdmAudControlDeviceType(
310 IN PDEVICE_OBJECT DeviceObject
,
312 IN PWDMAUD_DEVICE_INFO DeviceInfo
,
313 IN PWDMAUD_CLIENT ClientInfo
)
316 ULONG Count
, BytesReturned
, Index
, SubIndex
, Result
, NumPins
;
318 KSPIN_COMMUNICATION Communication
;
319 KSPIN_DATAFLOW DataFlow
;
320 PWDMAUD_DEVICE_EXTENSION DeviceExtension
;
322 if (DeviceInfo
->DeviceType
== MIXER_DEVICE_TYPE
)
324 DeviceInfo
->DeviceCount
= GetNumOfMixerDevices(DeviceObject
);
325 return SetIrpIoStatus(Irp
, STATUS_SUCCESS
, sizeof(WDMAUD_DEVICE_INFO
));
328 if (DeviceInfo
->DeviceType
!= WAVE_OUT_DEVICE_TYPE
&& DeviceInfo
->DeviceType
!= WAVE_IN_DEVICE_TYPE
)
330 DPRINT1("FIXME: Unsupported device type %x\n", DeviceInfo
->DeviceType
);
331 return SetIrpIoStatus(Irp
, STATUS_UNSUCCESSFUL
, 0);
334 Pin
.Property
.Set
= KSPROPSETID_Sysaudio
;
335 Pin
.Property
.Id
= KSPROPERTY_SYSAUDIO_DEVICE_COUNT
;
336 Pin
.Property
.Flags
= KSPROPERTY_TYPE_GET
;
338 DeviceExtension
= (PWDMAUD_DEVICE_EXTENSION
)DeviceObject
->DeviceExtension
;
339 Status
= KsSynchronousIoControlDevice(DeviceExtension
->FileObject
, KernelMode
, IOCTL_KS_PROPERTY
, (PVOID
)&Pin
, sizeof(KSPROPERTY
), (PVOID
)&Count
, sizeof(ULONG
), &BytesReturned
);
340 if (!NT_SUCCESS(Status
))
342 DPRINT1("KSPROPERTY_SYSAUDIO_DEVICE_COUNT failed with %x\n", Status
);
343 return SetIrpIoStatus(Irp
, Status
, sizeof(WDMAUD_DEVICE_INFO
));
346 /* now enumerate all available filters */
347 for(Index
= 0; Index
< Count
; Index
++)
349 /* query number of pins */
350 Pin
.Reserved
= Index
; // see sysaudio
351 Pin
.Property
.Flags
= KSPROPERTY_TYPE_GET
;
352 Pin
.Property
.Set
= KSPROPSETID_Pin
;
353 Pin
.Property
.Id
= KSPROPERTY_PIN_CTYPES
;
356 Status
= KsSynchronousIoControlDevice(DeviceExtension
->FileObject
, KernelMode
, IOCTL_KS_PROPERTY
, (PVOID
)&Pin
, sizeof(KSP_PIN
), (PVOID
)&NumPins
, sizeof(ULONG
), &BytesReturned
);
357 if (NT_SUCCESS(Status
))
359 /* enumerate now all pins */
360 for(SubIndex
= 0; SubIndex
< NumPins
; SubIndex
++)
362 Pin
.PinId
= SubIndex
;
363 Pin
.Property
.Id
= KSPROPERTY_PIN_COMMUNICATION
;
364 Communication
= KSPIN_COMMUNICATION_NONE
;
366 /* get pin communication type */
367 Status
= KsSynchronousIoControlDevice(DeviceExtension
->FileObject
, KernelMode
, IOCTL_KS_PROPERTY
, (PVOID
)&Pin
, sizeof(KSP_PIN
), (PVOID
)&Communication
, sizeof(KSPIN_COMMUNICATION
), &BytesReturned
);
368 if (!NT_SUCCESS(Status
))
371 Pin
.Property
.Id
= KSPROPERTY_PIN_DATAFLOW
;
374 /* get pin dataflow type */
375 Status
= KsSynchronousIoControlDevice(DeviceExtension
->FileObject
, KernelMode
, IOCTL_KS_PROPERTY
, (PVOID
)&Pin
, sizeof(KSP_PIN
), (PVOID
)&DataFlow
, sizeof(KSPIN_DATAFLOW
), &BytesReturned
);
376 if (!NT_SUCCESS(Status
))
379 if (DeviceInfo
->DeviceType
== WAVE_OUT_DEVICE_TYPE
)
381 if (Communication
== KSPIN_COMMUNICATION_SINK
&& DataFlow
== KSPIN_DATAFLOW_IN
)
384 else if (DeviceInfo
->DeviceType
== WAVE_IN_DEVICE_TYPE
)
386 if (Communication
== KSPIN_COMMUNICATION_SINK
&& DataFlow
== KSPIN_DATAFLOW_OUT
)
393 /* store result count */
394 DeviceInfo
->DeviceCount
= Result
;
396 DPRINT1("WdmAudControlDeviceType Status %x Devices %u\n", Status
, DeviceInfo
->DeviceCount
);
397 return SetIrpIoStatus(Irp
, STATUS_SUCCESS
, sizeof(WDMAUD_DEVICE_INFO
));
401 WdmAudControlDeviceState(
402 IN PDEVICE_OBJECT DeviceObject
,
404 IN PWDMAUD_DEVICE_INFO DeviceInfo
,
405 IN PWDMAUD_CLIENT ClientInfo
)
411 PFILE_OBJECT FileObject
;
413 //DPRINT1("WdmAudControlDeviceState\n");
415 Status
= ObReferenceObjectByHandle(DeviceInfo
->hDevice
, GENERIC_READ
| GENERIC_WRITE
, IoFileObjectType
, KernelMode
, (PVOID
*)&FileObject
, NULL
);
416 if (!NT_SUCCESS(Status
))
418 DPRINT1("Error: invalid device handle provided %p\n", DeviceInfo
->hDevice
);
419 return SetIrpIoStatus(Irp
, STATUS_UNSUCCESSFUL
, 0);
422 Property
.Set
= KSPROPSETID_Connection
;
423 Property
.Id
= KSPROPERTY_CONNECTION_STATE
;
424 Property
.Flags
= KSPROPERTY_TYPE_SET
;
426 State
= DeviceInfo
->u
.State
;
428 Status
= KsSynchronousIoControlDevice(FileObject
, KernelMode
, IOCTL_KS_PROPERTY
, (PVOID
)&Property
, sizeof(KSPROPERTY
), (PVOID
)&State
, sizeof(KSSTATE
), &BytesReturned
);
430 ObDereferenceObject(FileObject
);
432 //DPRINT1("WdmAudControlDeviceState Status %x\n", Status);
433 return SetIrpIoStatus(Irp
, Status
, sizeof(WDMAUD_DEVICE_INFO
));
438 IN PKSDATARANGE_AUDIO DataRangeAudio
,
439 ULONG SampleFrequency
,
447 if (DataRangeAudio
->MinimumSampleFrequency
<= SampleFrequency
&& DataRangeAudio
->MaximumSampleFrequency
>= SampleFrequency
)
449 if (DataRangeAudio
->MinimumBitsPerSample
<= 8 && DataRangeAudio
->MaximumBitsPerSample
>= 8)
452 if (DataRangeAudio
->MaximumChannels
>= 2)
454 Result
|= Stereo8Bit
;
458 if (DataRangeAudio
->MinimumBitsPerSample
<= 16 && DataRangeAudio
->MaximumBitsPerSample
>= 16)
461 if (DataRangeAudio
->MaximumChannels
>= 2)
463 Result
|= Stereo8Bit
;
471 PKEY_VALUE_PARTIAL_INFORMATION
474 IN PUNICODE_STRING KeyName
)
478 PKEY_VALUE_PARTIAL_INFORMATION PartialInformation
;
480 /* now query MatchingDeviceId key */
481 Status
= ZwQueryValueKey(hSubKey
, KeyName
, KeyValuePartialInformation
, NULL
, 0, &Length
);
483 /* check for success */
484 if (Status
!= STATUS_BUFFER_TOO_SMALL
)
487 /* allocate a buffer for key data */
488 PartialInformation
= ExAllocatePool(NonPagedPool
, Length
);
490 if (!PartialInformation
)
494 /* now query MatchingDeviceId key */
495 Status
= ZwQueryValueKey(hSubKey
, KeyName
, KeyValuePartialInformation
, PartialInformation
, Length
, &Length
);
497 /* check for success */
498 if (!NT_SUCCESS(Status
))
500 ExFreePool(PartialInformation
);
504 if (PartialInformation
->Type
!= REG_SZ
)
506 /* invalid key type */
507 ExFreePool(PartialInformation
);
511 return PartialInformation
;
519 IN ULONG ProductNameSize
,
520 OUT LPWSTR ProductName
)
522 PKEY_VALUE_PARTIAL_INFORMATION PartialInformation
;
523 UNICODE_STRING DriverDescName
= RTL_CONSTANT_STRING(L
"DriverDesc");
524 UNICODE_STRING MatchingDeviceIdName
= RTL_CONSTANT_STRING(L
"MatchingDeviceId");
528 /* read MatchingDeviceId value */
529 PartialInformation
= ReadKeyValue(hSubKey
, &MatchingDeviceIdName
);
531 if (!PartialInformation
)
532 return STATUS_UNSUCCESSFUL
;
535 /* extract last '&' */
536 DeviceName
= wcsrchr((LPWSTR
)PartialInformation
->Data
, L
'&');
539 DeviceName
[0] = L
'\0';
541 Length
= wcslen((LPWSTR
)PartialInformation
->Data
);
543 DPRINT("DeviceName %S PnpName %S Length %u\n", (LPWSTR
)PartialInformation
->Data
, PnpName
, Length
);
545 if (_wcsnicmp((LPWSTR
)PartialInformation
->Data
, &PnpName
[4], Length
))
547 ExFreePool(PartialInformation
);
548 return STATUS_NO_MATCH
;
552 ExFreePool(PartialInformation
);
554 /* read DriverDescName value */
555 PartialInformation
= ReadKeyValue(hSubKey
, &DriverDescName
);
558 Length
= min(ProductNameSize
* sizeof(WCHAR
), PartialInformation
->DataLength
);
559 RtlMoveMemory(ProductName
, (PVOID
)PartialInformation
->Data
, Length
);
561 /* zero terminate it */
562 ProductName
[ProductNameSize
-1] = L
'\0';
565 ExFreePool(PartialInformation
);
567 return STATUS_SUCCESS
;
575 IN ULONG ProductNameSize
,
576 OUT LPWSTR ProductName
)
578 UNICODE_STRING KeyName
= RTL_CONSTANT_STRING(L
"\\Registry\\Machine\\System\\CurrentControlSet\\Control\\Class\\{4D36E96C-E325-11CE-BFC1-08002BE10318}");
580 UNICODE_STRING SubKeyName
;
582 OBJECT_ATTRIBUTES ObjectAttributes
;
583 HANDLE hKey
, hSubKey
;
586 PKEY_FULL_INFORMATION KeyInformation
;
588 for(Index
= 0; Index
< wcslen(PnpName
); Index
++)
590 if (PnpName
[Index
] == '#')
591 PnpName
[Index
] = L
'\\';
595 /* initialize key attributes */
596 InitializeObjectAttributes(&ObjectAttributes
, &KeyName
, OBJ_CASE_INSENSITIVE
| OBJ_OPENIF
, NULL
, NULL
);
599 Status
= ZwOpenKey(&hKey
, GENERIC_READ
, &ObjectAttributes
);
601 /* check for success */
602 if (!NT_SUCCESS(Status
))
605 /* query num of subkeys */
606 Status
= ZwQueryKey(hKey
, KeyFullInformation
, NULL
, 0, &Length
);
608 if (Status
!= STATUS_BUFFER_TOO_SMALL
)
610 DPRINT1("ZwQueryKey failed with %x\n", Status
);
616 /* allocate key information struct */
617 KeyInformation
= ExAllocatePool(NonPagedPool
, Length
);
622 return STATUS_INSUFFICIENT_RESOURCES
;
625 /* query num of subkeys */
626 Status
= ZwQueryKey(hKey
, KeyFullInformation
, (PVOID
)KeyInformation
, Length
, &Length
);
628 if (!NT_SUCCESS(Status
))
630 DPRINT1("ZwQueryKey failed with %x\n", Status
);
631 ExFreePool(KeyInformation
);
636 /* now iterate through all subkeys */
637 for(Index
= 0; Index
< KeyInformation
->SubKeys
; Index
++)
639 /* subkeys are always in the format 0000-XXXX */
640 swprintf(SubKey
, L
"%04u", Index
);
642 /* initialize subkey name */
643 RtlInitUnicodeString(&SubKeyName
, SubKey
);
645 /* initialize key attributes */
646 InitializeObjectAttributes(&ObjectAttributes
, &SubKeyName
, OBJ_CASE_INSENSITIVE
| OBJ_OPENIF
, hKey
, NULL
);
648 /* open the sub key */
649 Status
= ZwOpenKey(&hSubKey
, GENERIC_READ
, &ObjectAttributes
);
651 /* check for success */
652 if (NT_SUCCESS(Status
))
654 /* compare product name */
655 Status
= CompareProductName(hSubKey
, PnpName
, ProductNameSize
, ProductName
);
660 if (NT_SUCCESS(Status
))
666 ExFreePool(KeyInformation
);
671 /* no matching key found */
679 IN PDEVICE_OBJECT DeviceObject
,
681 IN PWDMAUD_DEVICE_INFO DeviceInfo
,
682 IN PWDMAUD_CLIENT ClientInfo
)
684 PWDMAUD_DEVICE_EXTENSION DeviceExtension
;
685 NTSTATUS Status
= STATUS_UNSUCCESSFUL
;
687 KSCOMPONENTID ComponentId
;
688 KSMULTIPLE_ITEM
* MultipleItem
;
690 PKSDATARANGE_AUDIO DataRangeAudio
;
691 PKSDATARANGE DataRange
;
698 WCHAR DeviceName
[MAX_PATH
];
700 DPRINT("WdmAudCapabilities entered\n");
702 Status
= GetFilterIdAndPinId(DeviceObject
, DeviceInfo
, ClientInfo
, &FilterId
, &PinId
);
703 if (!NT_SUCCESS(Status
))
705 DPRINT1("Invalid device index provided %u\n", DeviceInfo
->DeviceIndex
);
706 return SetIrpIoStatus(Irp
, STATUS_INVALID_PARAMETER
, 0);
709 PinProperty
.PinId
= FilterId
;
710 PinProperty
.Property
.Set
= KSPROPSETID_Sysaudio
;
711 PinProperty
.Property
.Id
= KSPROPERTY_SYSAUDIO_COMPONENT_ID
;
712 PinProperty
.Property
.Flags
= KSPROPERTY_TYPE_GET
;
714 RtlZeroMemory(&ComponentId
, sizeof(KSCOMPONENTID
));
716 DeviceExtension
= (PWDMAUD_DEVICE_EXTENSION
)DeviceObject
->DeviceExtension
;
717 Status
= KsSynchronousIoControlDevice(DeviceExtension
->FileObject
, KernelMode
, IOCTL_KS_PROPERTY
, (PVOID
)&PinProperty
, sizeof(KSP_PIN
), (PVOID
)&ComponentId
, sizeof(KSCOMPONENTID
), &BytesReturned
);
718 if (NT_SUCCESS(Status
))
720 DeviceInfo
->u
.WaveOutCaps
.wMid
= ComponentId
.Manufacturer
.Data1
- 0xd5a47fa7;
721 DeviceInfo
->u
.WaveOutCaps
.vDriverVersion
= MAKELONG(ComponentId
.Version
, ComponentId
.Revision
);
724 /* retrieve pnp base name */
725 PinProperty
.PinId
= FilterId
;
726 PinProperty
.Property
.Set
= KSPROPSETID_Sysaudio
;
727 PinProperty
.Property
.Id
= KSPROPERTY_SYSAUDIO_DEVICE_INTERFACE_NAME
;
728 PinProperty
.Property
.Flags
= KSPROPERTY_TYPE_GET
;
730 Status
= KsSynchronousIoControlDevice(DeviceExtension
->FileObject
, KernelMode
, IOCTL_KS_PROPERTY
, (PVOID
)&PinProperty
, sizeof(KSP_PIN
), (PVOID
)DeviceName
, sizeof(DeviceName
), &BytesReturned
);
731 if (NT_SUCCESS(Status
))
733 /* find product name */
734 Status
= FindProductName(DeviceName
, MAXPNAMELEN
, DeviceInfo
->u
.WaveOutCaps
.szPname
);
736 /* check for success */
737 if (!NT_SUCCESS(Status
))
739 DeviceInfo
->u
.WaveOutCaps
.szPname
[0] = L
'\0';
743 PinProperty
.Reserved
= DeviceInfo
->DeviceIndex
;
744 PinProperty
.PinId
= PinId
;
745 PinProperty
.Property
.Set
= KSPROPSETID_Pin
;
746 PinProperty
.Property
.Id
= KSPROPERTY_PIN_DATARANGES
;
747 PinProperty
.Property
.Flags
= KSPROPERTY_TYPE_GET
;
750 Status
= KsSynchronousIoControlDevice(DeviceExtension
->FileObject
, KernelMode
, IOCTL_KS_PROPERTY
, (PVOID
)&PinProperty
, sizeof(KSP_PIN
), (PVOID
)NULL
, 0, &BytesReturned
);
751 if (Status
!= STATUS_BUFFER_TOO_SMALL
)
753 return SetIrpIoStatus(Irp
, Status
, 0);
756 MultipleItem
= ExAllocatePool(NonPagedPool
, BytesReturned
);
760 return SetIrpIoStatus(Irp
, STATUS_NO_MEMORY
, 0);
763 Status
= KsSynchronousIoControlDevice(DeviceExtension
->FileObject
, KernelMode
, IOCTL_KS_PROPERTY
, (PVOID
)&PinProperty
, sizeof(KSP_PIN
), (PVOID
)MultipleItem
, BytesReturned
, &BytesReturned
);
764 if (!NT_SUCCESS(Status
))
766 ExFreePool(MultipleItem
);
767 return SetIrpIoStatus(Irp
, Status
, 0);
770 DataRange
= (PKSDATARANGE
) (MultipleItem
+ 1);
771 for(Index
= 0; Index
< MultipleItem
->Count
; Index
++)
773 if (DeviceInfo
->DeviceType
== WAVE_OUT_DEVICE_TYPE
|| DeviceInfo
->DeviceType
== WAVE_IN_DEVICE_TYPE
)
775 if (DataRange
->FormatSize
== sizeof(KSDATARANGE_AUDIO
))
777 DataRangeAudio
= (PKSDATARANGE_AUDIO
)DataRange
;
779 if (IsEqualGUIDAligned(&DataRangeAudio
->DataRange
.MajorFormat
, &KSDATAFORMAT_TYPE_AUDIO
) &&
780 IsEqualGUIDAligned(&DataRangeAudio
->DataRange
.SubFormat
, &KSDATAFORMAT_SUBTYPE_PCM
) &&
781 IsEqualGUIDAligned(&DataRangeAudio
->DataRange
.Specifier
, &KSDATAFORMAT_SPECIFIER_WAVEFORMATEX
))
783 DPRINT("Min Sample %u Max Sample %u Min Bits %u Max Bits %u Max Channel %u\n", DataRangeAudio
->MinimumSampleFrequency
, DataRangeAudio
->MaximumSampleFrequency
,
784 DataRangeAudio
->MinimumBitsPerSample
, DataRangeAudio
->MaximumBitsPerSample
, DataRangeAudio
->MaximumChannels
);
786 dwFormats
|= CheckFormatSupport(DataRangeAudio
, 11025, WAVE_FORMAT_1M08
, WAVE_FORMAT_1S08
, WAVE_FORMAT_1M16
, WAVE_FORMAT_1S16
);
787 dwFormats
|= CheckFormatSupport(DataRangeAudio
, 22050, WAVE_FORMAT_2M08
, WAVE_FORMAT_2S08
, WAVE_FORMAT_2M16
, WAVE_FORMAT_2S16
);
788 dwFormats
|= CheckFormatSupport(DataRangeAudio
, 44100, WAVE_FORMAT_4M08
, WAVE_FORMAT_4S08
, WAVE_FORMAT_4M16
, WAVE_FORMAT_4S16
);
789 dwFormats
|= CheckFormatSupport(DataRangeAudio
, 48000, WAVE_FORMAT_48M08
, WAVE_FORMAT_48S08
, WAVE_FORMAT_48M16
, WAVE_FORMAT_48S16
);
790 dwFormats
|= CheckFormatSupport(DataRangeAudio
, 96000, WAVE_FORMAT_96M08
, WAVE_FORMAT_96S08
, WAVE_FORMAT_96M16
, WAVE_FORMAT_96S16
);
793 wChannels
= DataRangeAudio
->MaximumChannels
;
794 dwSupport
= WAVECAPS_VOLUME
; //FIXME get info from nodes
798 DataRange
= (PKSDATARANGE
)((PUCHAR
)DataRange
+ DataRange
->FormatSize
);
801 DeviceInfo
->u
.WaveOutCaps
.dwFormats
= dwFormats
;
802 DeviceInfo
->u
.WaveOutCaps
.dwSupport
= dwSupport
;
803 DeviceInfo
->u
.WaveOutCaps
.wChannels
= wChannels
;
805 ExFreePool(MultipleItem
);
807 return SetIrpIoStatus(Irp
, Status
, sizeof(WDMAUD_DEVICE_INFO
));
813 IN PDEVICE_OBJECT DeviceObject
,
815 IN PWDMAUD_DEVICE_INFO DeviceInfo
,
816 IN PWDMAUD_CLIENT ClientInfo
)
820 for(Index
= 0; Index
< ClientInfo
->NumPins
; Index
++)
822 if (ClientInfo
->hPins
[Index
].Handle
== DeviceInfo
->hDevice
&& ClientInfo
->hPins
[Index
].Type
!= MIXER_DEVICE_TYPE
)
824 DPRINT1("Closing device %p\n", DeviceInfo
->hDevice
);
825 ZwClose(DeviceInfo
->hDevice
);
826 ClientInfo
->hPins
[Index
].Handle
= NULL
;
827 SetIrpIoStatus(Irp
, STATUS_SUCCESS
, sizeof(WDMAUD_DEVICE_INFO
));
828 return STATUS_SUCCESS
;
831 SetIrpIoStatus(Irp
, STATUS_INVALID_PARAMETER
, sizeof(WDMAUD_DEVICE_INFO
));
832 return STATUS_INVALID_PARAMETER
;
838 IN PDEVICE_OBJECT DeviceObject
,
840 IN PWDMAUD_DEVICE_INFO DeviceInfo
,
841 IN PWDMAUD_CLIENT ClientInfo
)
843 PFILE_OBJECT FileObject
;
846 KSALLOCATOR_FRAMING Framing
;
849 /* Get sysaudio pin file object */
850 Status
= ObReferenceObjectByHandle(DeviceInfo
->hDevice
, GENERIC_WRITE
, IoFileObjectType
, KernelMode
, (PVOID
*)&FileObject
, NULL
);
851 if (!NT_SUCCESS(Status
))
853 DPRINT1("Invalid buffer handle %x\n", DeviceInfo
->hDevice
);
854 return SetIrpIoStatus(Irp
, Status
, 0);
857 /* Setup get framing request */
858 Property
.Id
= KSPROPERTY_CONNECTION_ALLOCATORFRAMING
;
859 Property
.Flags
= KSPROPERTY_TYPE_GET
;
860 Property
.Set
= KSPROPSETID_Connection
;
862 Status
= KsSynchronousIoControlDevice(FileObject
, KernelMode
, IOCTL_KS_PROPERTY
, (PVOID
)&Property
, sizeof(KSPROPERTY
), (PVOID
)&Framing
, sizeof(KSALLOCATOR_FRAMING
), &BytesReturned
);
864 if (NT_SUCCESS(Status
))
866 /* Store framesize */
867 DeviceInfo
->u
.FrameSize
= Framing
.FrameSize
;
870 /* Release file object */
871 ObDereferenceObject(FileObject
);
873 return SetIrpIoStatus(Irp
, Status
, sizeof(WDMAUD_DEVICE_INFO
));
881 IN PDEVICE_OBJECT DeviceObject
,
884 PIO_STACK_LOCATION IoStack
;
885 PWDMAUD_DEVICE_INFO DeviceInfo
;
886 PWDMAUD_CLIENT ClientInfo
;
888 IoStack
= IoGetCurrentIrpStackLocation(Irp
);
890 DPRINT("WdmAudDeviceControl entered\n");
892 if (IoStack
->Parameters
.DeviceIoControl
.InputBufferLength
< sizeof(WDMAUD_DEVICE_INFO
))
894 /* invalid parameter */
895 DPRINT1("Input buffer too small size %u expected %u\n", IoStack
->Parameters
.DeviceIoControl
.InputBufferLength
, sizeof(WDMAUD_DEVICE_INFO
));
896 return SetIrpIoStatus(Irp
, STATUS_INVALID_PARAMETER
, 0);
899 DeviceInfo
= (PWDMAUD_DEVICE_INFO
)Irp
->AssociatedIrp
.SystemBuffer
;
901 if (DeviceInfo
->DeviceType
< MIN_SOUND_DEVICE_TYPE
|| DeviceInfo
->DeviceType
> MAX_SOUND_DEVICE_TYPE
)
903 /* invalid parameter */
904 DPRINT1("Error: device type not set\n");
905 return SetIrpIoStatus(Irp
, STATUS_INVALID_PARAMETER
, 0);
908 if (!IoStack
->FileObject
)
910 /* file object parameter */
911 DPRINT1("Error: file object is not attached\n");
912 return SetIrpIoStatus(Irp
, STATUS_UNSUCCESSFUL
, 0);
914 ClientInfo
= (PWDMAUD_CLIENT
)IoStack
->FileObject
->FsContext
;
916 DPRINT("WdmAudDeviceControl entered\n");
918 switch(IoStack
->Parameters
.DeviceIoControl
.IoControlCode
)
920 case IOCTL_OPEN_WDMAUD
:
921 return WdmAudControlOpen(DeviceObject
, Irp
, DeviceInfo
, ClientInfo
);
922 case IOCTL_GETNUMDEVS_TYPE
:
923 return WdmAudControlDeviceType(DeviceObject
, Irp
, DeviceInfo
, ClientInfo
);
924 case IOCTL_SETDEVICE_STATE
:
925 return WdmAudControlDeviceState(DeviceObject
, Irp
, DeviceInfo
, ClientInfo
);
926 case IOCTL_GETCAPABILITIES
:
927 return WdmAudCapabilities(DeviceObject
, Irp
, DeviceInfo
, ClientInfo
);
928 case IOCTL_CLOSE_WDMAUD
:
929 return WdmAudIoctlClose(DeviceObject
, Irp
, DeviceInfo
, ClientInfo
);
930 case IOCTL_GETFRAMESIZE
:
931 return WdmAudFrameSize(DeviceObject
, Irp
, DeviceInfo
, ClientInfo
);
934 case IOCTL_GETVOLUME
:
935 case IOCTL_SETVOLUME
:
937 DPRINT1("Unhandeled %x\n", IoStack
->Parameters
.DeviceIoControl
.IoControlCode
);
941 return SetIrpIoStatus(Irp
, STATUS_NOT_IMPLEMENTED
, 0);
946 WdmAudWriteCompletion(
947 IN PDEVICE_OBJECT DeviceObject
,
952 ASSERT(LowerIrp
->PendingReturned
== FALSE
);
953 /* get original irp */
957 Irp
->IoStatus
.Status
= LowerIrp
->IoStatus
.Status
;
958 Irp
->IoStatus
.Information
= LowerIrp
->IoStatus
.Information
;
959 /* complete request */
960 IoCompleteRequest(Irp
, IO_SOUND_INCREMENT
);
961 /* return success to free irp */
962 return STATUS_SUCCESS
;
969 IN PDEVICE_OBJECT DeviceObject
,
972 PIO_STACK_LOCATION IoStack
;
973 PWDMAUD_DEVICE_INFO DeviceInfo
;
974 PWDMAUD_CLIENT ClientInfo
;
975 NTSTATUS Status
= STATUS_SUCCESS
;
977 PFILE_OBJECT FileObject
;
980 PCONTEXT_WRITE Packet
;
982 //LARGE_INTEGER Offset;
983 IO_STATUS_BLOCK IoStatusBlock
;
985 IoStack
= IoGetCurrentIrpStackLocation(Irp
);
987 //DPRINT("WdmAudWrite entered\n");
989 if (IoStack
->Parameters
.Write
.Length
< sizeof(WDMAUD_DEVICE_INFO
))
991 /* invalid parameter */
992 DPRINT1("Input buffer too small size %u expected %u\n", IoStack
->Parameters
.Write
.Length
, sizeof(WDMAUD_DEVICE_INFO
));
993 return SetIrpIoStatus(Irp
, STATUS_INVALID_PARAMETER
, 0);
996 DeviceInfo
= (PWDMAUD_DEVICE_INFO
)MmGetMdlVirtualAddress(Irp
->MdlAddress
);
999 Status
= ObReferenceObjectByHandle(DeviceInfo
->hDevice
, GENERIC_WRITE
, IoFileObjectType
, KernelMode
, (PVOID
*)&FileObject
, NULL
);
1000 if (!NT_SUCCESS(Status
))
1002 DPRINT1("Invalid buffer handle %x\n", DeviceInfo
->hDevice
);
1003 return SetIrpIoStatus(Irp
, Status
, 0);
1007 //DPRINT("DeviceInfo %p %p %p\n", DeviceInfo, Irp->MdlAddress->StartVa, Irp->MdlAddress->MappedSystemVa);
1008 if (DeviceInfo
->DeviceType
< MIN_SOUND_DEVICE_TYPE
|| DeviceInfo
->DeviceType
> MAX_SOUND_DEVICE_TYPE
)
1010 /* invalid parameter */
1011 DPRINT1("Error: device type not set\n");
1012 ObDereferenceObject(FileObject
);
1013 return SetIrpIoStatus(Irp
, STATUS_INVALID_PARAMETER
, 0);
1016 if (!IoStack
->FileObject
)
1018 /* file object parameter */
1019 DPRINT1("Error: file object is not attached\n");
1020 ObDereferenceObject(FileObject
);
1021 return SetIrpIoStatus(Irp
, STATUS_UNSUCCESSFUL
, 0);
1023 ClientInfo
= (PWDMAUD_CLIENT
)IoStack
->FileObject
->FsContext
;
1026 /* setup stream context */
1027 Packet
= (PCONTEXT_WRITE
)ExAllocatePool(NonPagedPool
, sizeof(CONTEXT_WRITE
));
1031 return SetIrpIoStatus(Irp
, STATUS_NO_MEMORY
, 0);
1034 Packet
->Header
.FrameExtent
= DeviceInfo
->BufferSize
;
1035 Packet
->Header
.DataUsed
= DeviceInfo
->BufferSize
;
1036 Packet
->Header
.Size
= sizeof(KSSTREAM_HEADER
);
1037 Packet
->Header
.PresentationTime
.Numerator
= 1;
1038 Packet
->Header
.PresentationTime
.Denominator
= 1;
1041 Buffer
= ExAllocatePool(NonPagedPool
, DeviceInfo
->BufferSize
);
1046 ObDereferenceObject(FileObject
);
1047 return SetIrpIoStatus(Irp
, STATUS_NO_MEMORY
, 0);
1049 Packet
->Header
.Data
= Buffer
;
1051 Mdl
= IoAllocateMdl(DeviceInfo
->Buffer
, DeviceInfo
->BufferSize
, FALSE
, FALSE
, FALSE
);
1056 ObDereferenceObject(FileObject
);
1058 return SetIrpIoStatus(Irp
, STATUS_NO_MEMORY
, 0);
1063 MmProbeAndLockPages(Mdl
, UserMode
, IoReadAccess
);
1065 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER
)
1067 /* Exception, get the error code */
1068 Status
= _SEH2_GetExceptionCode();
1072 if (!NT_SUCCESS(Status
))
1074 DPRINT1("Invalid buffer supplied\n");
1078 ObDereferenceObject(FileObject
);
1079 return SetIrpIoStatus(Irp
, Status
, 0);
1082 SystemBuffer
= MmGetSystemAddressForMdlSafe(Mdl
, NormalPagePriority
);
1085 DPRINT1("Invalid buffer supplied\n");
1089 ObDereferenceObject(FileObject
);
1090 return SetIrpIoStatus(Irp
, STATUS_INSUFFICIENT_RESOURCES
, 0);
1093 RtlMoveMemory(Buffer
, SystemBuffer
, DeviceInfo
->BufferSize
);
1098 KsStreamIo(FileObject
, NULL
, NULL
, NULL
, NULL
, 0, &IoStatusBlock
, Packet
, sizeof(CONTEXT_WRITE
), KSSTREAM_WRITE
, UserMode
);
1099 /* dereference file object */
1100 ObDereferenceObject(FileObject
);
1101 return IoStatusBlock
.Status
;
1103 Offset
.QuadPart
= 0L;
1105 /* now build the irp */
1106 LowerIrp
= IoBuildAsynchronousFsdRequest (IRP_MJ_WRITE
,
1107 IoGetRelatedDeviceObject(FileObject
),
1109 sizeof(KSSTREAM_HEADER
),
1115 /* failed to create an associated irp */
1118 ObDereferenceObject(FileObject
);
1120 return SetIrpIoStatus(Irp
, STATUS_INSUFFICIENT_RESOURCES
, 0);
1123 /* get next stack location */
1124 IoStack
= IoGetNextIrpStackLocation(LowerIrp
);
1126 /* attach file object */
1127 IoStack
->FileObject
= FileObject
;
1129 /* set a completion routine */
1130 IoSetCompletionRoutine(LowerIrp
, WdmAudWriteCompletion
, (PVOID
)Irp
, TRUE
, TRUE
, TRUE
);
1132 /* mark irp as pending */
1133 IoMarkIrpPending(Irp
);
1135 /* call the driver */
1136 Status
= IoCallDriver(IoGetRelatedDeviceObject(FileObject
), LowerIrp
);
1138 /* dereference file object */
1139 ObDereferenceObject(FileObject
);
1141 return STATUS_PENDING
;