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// ------------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
// File Name:
//
// PreComp.h
//
// Abstract:
//
// Precompiled common headers
//
// -------------------------------------------------------------------------------
// Number of milliseconds that the test will be delayed to wait for the stream to stabilize
#define DELAY_FOR_STABILIZE 100
// Number of milliseconds in a second
#define MILLISECONDS_PER_SECOND 1000
// Number of microseconds in a second
#define MICROSECONDS_PER_SECOND 1000000
// Number of HNS units in one second
#define HNSTIME_UNITS_PER_SECOND 10000000
// Number of HNS units in one millisecond
#define HNSTIME_UNITS_PER_MILLISECOND 10000
// Number of HNS units per microsecond
#define HNSTIME_UNITS_PER_MICROSECOND 10
typedef double (*TIMEPROC) (void);
double tpQPC(void);
typedef struct _tag_tm
{
TIMEPROC Proc;
LPCSTR strRep;
} TIMER_MECHANISM, * PTIMER_MECHANISM;
// ----------------------------------------------------------
// Timer functions
extern "C" __kernel_entry NTSYSCALLAPI NTSTATUS NTAPI NtSetTimerResolution(
_In_ ULONG DesiredTime, _In_ BOOLEAN SetResolution, _Out_ PULONG ActualTime);
// 1 ms timer resolution
static ULONG timerResolution = (1 * 10000);
static ULONG actualTimerResolution;
// ------------------------------------------------------------------------------
// structs used to hold results of perf tests
#define DATA_POINTS 100
typedef struct
{
double testTime; // Time the sample was taken, in milliseconds, relative to the start of the sample collection
double positionTime; // Time of the reported position, in milliseconds, relative to the start of the sample collection
double position; // Position, in seconds, relative to the start of the sample collection
} POSITION_SET, * PPOSITION_SET;
typedef struct
{
PPOSITION_SET argPosSets;
ULONG cPosSets;
ULONG ctLatencyMeas;
ULONG csBufferMeas;
double bytesPerSecond; // measured (in bytes/sec, NOT samples/sec)
double dOffset; // measured
} PERF_RESULTS, * PPERF_RESULTS;
typedef struct
{
WAVEFORMATEXTENSIBLE wfxFormat;
PERF_RESULTS perfResults; //
} FORMAT_ENTRY, * PFORMAT_ENTRY;
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