PFNKSDEVICESETPOWER callback function (ks.h)
AVStream calls a minidriver's AVStrMiniDeviceSetPower routine when it receives an IRP_MN_SET_POWER.
Syntax
PFNKSDEVICESETPOWER Pfnksdevicesetpower;
void Pfnksdevicesetpower(
[in] PKSDEVICE Device,
[in] PIRP Irp,
[in] DEVICE_POWER_STATE To,
[in] DEVICE_POWER_STATE From
)
{...}
Parameters
[in] Device
Pointer to the KSDEVICE structure that received the IRP_MN_SET_POWER.
[in] Irp
The IRP_MN_SET_POWER issued by Device.
[in] To
The target device power state.
[in] From
The current device power state.
Return value
None
Remarks
If a driver has registered its device for idle detection, the power manager sends an IRP_MN_SET_POWER to change the power state of an idle device.
The minidriver specifies this routine's address in the SetPower member of its KSDEVICE_DISPATCH structure.
This routine is optional.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Available in Microsoft Windows XP and later operating systems and DirectX 8.0 and later DirectX versions. |
| Target Platform | Desktop |
| Header | ks.h (include Ks.h) |