PERFINFO_DSHOW_AUDIOBREAK Structure

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Microsoft DirectShow 9.0

PERFINFO_DSHOW_AUDIOBREAK Structure

The PERFINFO_DSHOW_AUDIOBREAK structure contains data for a trace event of type GUID_AUDIOBREAK.

The DirectSound Renderer filter logs this event when there is a break in the audio stream.

Syntax

typedef struct PERFINFO_DSHOW_AUDIOBREAK {
    ULONGLONG    cycleCounter;
    ULONGLONG    dshowClock;
    ULONGLONG    sampleTime;
    ULONGLONG    sampleDuration;
} PERFINFO_DSHOW_AUDIOBREAK, *PPERFINFO_DSHOW_AUDIOBREAK;

Members

cycleCounter

Latest clock cycle count (RDTSC instruction).

dshowClock

Current write position in the DirectSound buffer.

sampleTime

Start of the audio break in the DirectSound buffer.

sampleDuration

Duration of the break, in milliseconds.

Remarks

To enable this event, you must set the AUDIOBREAK_BIT flag in the EnableFlag parameter when you call EnableTrace. This flag is defined in the header file Dxmperf.h, which is included in the DirectShow base classes.

To log this event from a DirectShow filter, use the PERFLOG_AUDIOBREAK macro, which is defined in Dxmperf.h.

Requirements

Header: Perfstruct.h.

See Also