// ksmedia.h

typedef struct {
  LARGE_INTEGER    TimerFrequency;
  LARGE_INTEGER    TimeStamp1;
  KSAUDIO_POSITION Position;
  LARGE_INTEGER    TimeStamp2;
} KSAUDIO_POSITIONEX, *PKSAUDIO_POSITIONEX;
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Windows Driver Kit DDI reference (ns-ksmedia-ksaudio_positionex)

KSAUDIO_POSITIONEX structure

Description

The KSAUDIO_POSITIONEX structure specifies the stream position and the associated timestamp information for a kernel streaming (KS)-based audio driver.

Members

`TimerFrequency`

Specifies the number of ticks per second for the timer that produces the timestamps.

`TimeStamp1`

Specifies the timestamp that is taken immediately prior to the acquisition of the position information.

`Position`

Specifies the position of the read cursor and the write cursor in the audio buffer of an audio stream.

`TimeStamp2`

Specifies the timestamp that is taken immediately after the acquisition of the position information.

Remarks

A KS-based audio driver can use the KSAUDIO_POSITIONEX structure along with the KSPROPERTY_AUDIO_POSITIONEX property to return a stream position and a timestamp.

KSAUDIO_POSITIONEX - NtDoc