KSPROPERTY_AUDIOENGINE_BUFFER_SIZE_RANGE

The KSPROPERTY_AUDIOENGINE_BUFFER_SIZE_RANGE property indicates the minimum and maximum size of buffer that the hardware audio engine can support for a given data format, at the instance when it is called. The buffer size is specified in bytes.

Usage Summary Table

Return Value

A KSPROPERTY_AUDIOENGINE_BUFFER_SIZE_RANGE property request returns STATUS_SUCCESS to indicate that it has completed successfully. Otherwise, the request returns an appropriate error status code.

Remarks

It is important to note that before a caller calls the KSPROPERTY_AUDIOENGINE_BUFFER_SIZE_RANGE property, the caller fills in the fields of a KSDATAFORMAT_WAVEFORMATEX structure. So when KSPROPERTY_AUDIOENGINE_BUFFER_SIZE_RANGE is called, the audio driver receives a KSP_NODE followed by a filled-in KSDATAFORMAT_WAVEFORMATEX structure from the caller. The driver uses the data format information in this structure to determine the min and max buffer sizes to accommodate the specified data format. Upon a successful call to this property, the kernel streaming (KS) filter then fills in the MinBufferBytes and MaxBufferBytes fields of the KSAUDIOENGINE_BUFFER_SIZE_RANGE structure.

Requirements

See also

KSAUDIOENGINE_BUFFER_SIZE_RANGE

KSDATAFORMAT_WAVEFORMATEX

KSPROPERTY_AUDIOENGINE