const GUID KSCATEGORY_SYSAUDIO = {0xA7C7A5B1L, 0x5AF3, 0x11D1, {0x9C, 0xED, 0x00, 0xA0, 0x24, 0xBF, 0x04, 0x07}};
const GUID KSCATEGORY_WDMAUD = {0x3E227E76L, 0x690D, 0x11D2, {0x81, 0x61, 0x00, 0x00, 0xF8, 0x77, 0x5B, 0xF1}};
+IO_WORKITEM_ROUTINE WdmAudInitWorkerRoutine;
+IO_TIMER_ROUTINE WdmAudTimerRoutine;
+
+VOID
+NTAPI
+WdmAudInitWorkerRoutine(
+ IN PDEVICE_OBJECT DeviceObject,
+ IN PVOID Context)
+{
+ NTSTATUS Status;
+ PWDMAUD_DEVICE_EXTENSION DeviceExtension;
+ ULONG DeviceCount;
+
+ /* get device extension */
+ DeviceExtension = (PWDMAUD_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
+
+ /* get device count */
+ DeviceCount = GetSysAudioDeviceCount(DeviceObject);
+
+ DPRINT("WdmAudInitWorkerRoutine SysAudioDeviceCount %ld\n", DeviceCount);
+
+ /* was a device added / removed */
+ if (DeviceCount != DeviceExtension->SysAudioDeviceCount)
+ {
+ /* init mmixer library */
+ Status = WdmAudMixerInitialize(DeviceObject);
+ DPRINT("WdmAudMixerInitialize Status %x WaveIn %lu WaveOut %lu Mixer %lu\n", Status, WdmAudGetWaveInDeviceCount(), WdmAudGetWaveOutDeviceCount(), WdmAudGetMixerDeviceCount());
+
+ /* store sysaudio device count */
+ DeviceExtension->SysAudioDeviceCount = DeviceCount;
+ }
+
+ /* signal completion */
+ KeSetEvent(&DeviceExtension->InitializationCompletionEvent, IO_NO_INCREMENT, FALSE);
+
+ /* reset work item status indicator */
+ InterlockedDecrement((volatile long *)&DeviceExtension->WorkItemActive);
+}
+
+VOID
+NTAPI
+WdmAudTimerRoutine(
+ IN PDEVICE_OBJECT DeviceObject,
+ IN PVOID Context)
+{
+ PWDMAUD_DEVICE_EXTENSION DeviceExtension;
+
+ /* get device extension */
+ DeviceExtension = (PWDMAUD_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
+
+ if (InterlockedCompareExchange((volatile long *)&DeviceExtension->WorkItemActive, 1, 0) == 0)
+ {
+ /* queue work item */
+ IoQueueWorkItem(DeviceExtension->WorkItem, WdmAudInitWorkerRoutine, DelayedWorkQueue, (PVOID)DeviceExtension);
+ }
+}
+
NTSTATUS
NTAPI
WdmAudInstallDevice(
return Status;
}
- /* clear device extension */
+ /* get device extension */
DeviceExtension = (PWDMAUD_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
RtlZeroMemory(DeviceExtension, sizeof(WDMAUD_DEVICE_EXTENSION));
+ /* allocate work item */
+ DeviceExtension->WorkItem = IoAllocateWorkItem(DeviceObject);
+ if (!DeviceExtension->WorkItem)
+ {
+ /* failed to allocate work item */
+ IoDeleteDevice(DeviceObject);
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
/* register device interfaces */
Status = WdmAudRegisterDeviceInterface(DeviceObject, DeviceExtension);
if (!NT_SUCCESS(Status))
/* initialize spinlock */
KeInitializeSpinLock(&DeviceExtension->Lock);
+ /* initialization completion event */
+ KeInitializeEvent(&DeviceExtension->InitializationCompletionEvent, NotificationEvent, FALSE);
+
+ /* initialize timer */
+ IoInitializeTimer(DeviceObject, WdmAudTimerRoutine, (PVOID)WdmAudTimerRoutine);
+
/* find available sysaudio devices */
Status = WdmAudOpenSysAudioDevices(DeviceObject, DeviceExtension);
if (!NT_SUCCESS(Status))
IoDeleteDevice(DeviceObject);
return Status;
}
+
/* allocate ks device header */
Status = KsAllocateDeviceHeader(&DeviceExtension->DeviceHeader, 0, NULL);
if (!NT_SUCCESS(Status))
return Status;
}
- Status = WdmAudMixerInitialize(DeviceObject);
- DPRINT("WdmAudMixerInitialize Status %x WaveIn %lu WaveOut %lu Mixer %lu\n", Status, WdmAudGetWaveInDeviceCount(), WdmAudGetWaveOutDeviceCount(), WdmAudGetMixerDeviceCount());
+ /* start the timer */
+ IoStartTimer(DeviceObject);
DeviceObject->Flags |= DO_DIRECT_IO | DO_POWER_PAGABLE;
DeviceObject->Flags &= ~ DO_DEVICE_INITIALIZING;
goto cleanup;
}
- RtlAppendUnicodeToString(&DeviceEntry->DeviceName, L"\\??\\");
- RtlAppendUnicodeStringToString(&DeviceEntry->DeviceName, DeviceName);
+ /* open device */
+ Status = OpenDevice(DeviceName, &DeviceEntry->Handle, &DeviceEntry->FileObject);
+ if (NT_SUCCESS(Status))
+ {
+ /* copy device name */
+ RtlAppendUnicodeStringToString(&DeviceEntry->DeviceName, DeviceName);
+ }
+ else
+ {
+ /* the device name needs to be prefixed */
+ RtlAppendUnicodeToString(&DeviceEntry->DeviceName, L"\\??\\");
+ RtlAppendUnicodeStringToString(&DeviceEntry->DeviceName, DeviceName);
- Status = OpenDevice(&DeviceEntry->DeviceName, &DeviceEntry->Handle, &DeviceEntry->FileObject);
+ /* open device */
+ Status = OpenDevice(&DeviceEntry->DeviceName, &DeviceEntry->Handle, &DeviceEntry->FileObject);
+ }
- if (!NT_SUCCESS(Status))
- {
- goto cleanup;
- }
+ if (!NT_SUCCESS(Status))
+ {
+ goto cleanup;
+ }
/* fetch device extension */
DeviceExtension = (PSYSAUDIODEVEXT)DeviceObject->DeviceExtension;