IOCTL_SBAUD_GET_VOLUMEPROPERTYVALUES IOCTL (sidebandaudio.h)
Audio driver can call IOCTL_SBAUD_GET_VOLUMEPROPERTYVALUES to query the volume stepped data ranges and min/max values for all of the channels. These values should then be returned for KSPROPERTY_AUDIO_VOLUMELEVEL basic support.
Major code
Input buffer
Endpoint index.
Input buffer length
Size of ULONG.
Output buffer
KSPROPERTY_DESCRIPTION followed by KSPROPERTY_MEMBERSHEADER and Volume stepped data ranges as documented in KSPROPERTY_DESCRIPTION and KSPROPERTY_MEMBERSHEADER.
Output buffer length
Size of KSPROPERTY_DESCRIPTION in addition to all the KSPROPERTY_MEMBERSHEADER and step ranges. This size was returned in SIDEBANDAUDIO_ENDPOINT_DESCRIPTOR::VolumePropertyValuesSize.
Input / Output buffer
Input Endpoint Index and output KSPROPERTY_DESCRIPTION share the same buffer.
Input / Output buffer length
Allocated buffer should be of length SIDEBANDAUDIO_ENDPOINT_DESCRIPTOR::VolumePropertyValuesSize.
Status block
Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful. Otherwise, Status to the appropriate error condition as a NTSTATUS code. For more information, see NTSTATUS Values.
Remarks
This IOCTL can only be called from kernel mode.
Requirements
| Requirement | Value |
|---|---|
| Header | sidebandaudio.h |