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windows-xp/Source/XPSP1/NT/multimedia/dshow/tools/dsperf/dsperf.cpp

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/*++
Copyright © 2000 Microsoft Corporation
Module Name:
dsperf.c
Abstract:
This module contains the implementation of the DShow performance counter
provider. It acts as a WMI event tracing controller and consumer and exposes
standard NT performance counters.
Author:
Arthur Zwiegincew (arthurz) 05-Oct-00
Revision History:
05-Oct-00 - Created
--*/
#include <windows.h>
#include <winperf.h>
#include <stdio.h>
#include <wmistr.h>
#include <evntrace.h>
#include <initguid.h>
#include <math.h>
#include "dscounters.h"
#define WMIPERF
#include <perfstruct.h>
typedef LONG LOGICAL;
GUID KmixerGuid =
{ 0xe5a43a19, 0x6de0, 0x44f8, 0xb0, 0xd7, 0x77, 0x2d, 0xbd, 0xe4, 0x6c, 0xc0 };
GUID PortclsGuid =
{ 0x9d447297, 0xc576, 0x4015, 0x87, 0xb5, 0xa5, 0xa6, 0x98, 0xfd, 0x4d, 0xd1 };
GUID UsbaudioGuid =
{ 0xd6464a84, 0xa358, 0x4013, 0xa1, 0xe8, 0x6e, 0x2f, 0xb4, 0x8a, 0xab, 0x93 };
//
// Video glitch threshold. When abs(PresentationTime - RenderTime) > this value,
// we consider the event a glitch.
//
#define GLITCH_THRESHOLD 30 /* ms */ * 10000 /* 1 ms / 100 ns */
//
// Performance data.
//
ULONG VideoGlitches;
ULONG VideoGlitchesPerSec;
ULONG VideoFrameRate;
ULONG VideoJitter;
ULONG DsoundGlitches;
ULONG KmixerGlitches;
ULONG PortclsGlitches;
ULONG UsbaudioGlitches;
ULONG VideoGlitchesSinceLastMeasurement;
ULONG FramesRendered;
ULONGLONG LastMeasurementTime;
#define JITTER_HISTORY_BUFFER_SIZE 200
LONGLONG FrameJitterHistory[JITTER_HISTORY_BUFFER_SIZE];
ULONG NextJitterEntry;
//
// DSHOW WMI provider GUID.
//
GUID ControlGuid = GUID_DSHOW_CTL;
//
// Event tracing-related globals.
//
HANDLE MonitorThread;
HANDLE ResetThread;
TRACEHANDLE LoggerHandle;
TRACEHANDLE ConsumerHandle;
EVENT_TRACE_LOGFILE Logfile;
ULONGLONG LastBufferFlushTime;
//
// Performance monitoring structures.
//
typedef struct _DSHOW_PERF_DATA_DEFINITION {
PERF_OBJECT_TYPE ObjectType;
PERF_COUNTER_DEFINITION VideoGlitches;
PERF_COUNTER_DEFINITION VideoGlitchesPerSec;
PERF_COUNTER_DEFINITION VideoFrameRate;
PERF_COUNTER_DEFINITION VideoJitter;
PERF_COUNTER_DEFINITION DsoundGlitches;
PERF_COUNTER_DEFINITION KmixerGlitches;
PERF_COUNTER_DEFINITION PortclsGlitches;
PERF_COUNTER_DEFINITION UsbaudioGlitches;
} DSHOW_PERF_DATA_DEFINITION, *PDSHOW_PERF_DATA_DEFINITION;
typedef struct _DSHOW_PERF_COUNTERS {
PERF_COUNTER_BLOCK CounterBlock;
ULONG Pad;
ULONG VideoGlitches;
ULONG VideoGlitchesPerSec;
ULONG VideoFrameRate;
ULONG VideoJitter;
ULONG DsoundGlitches;
ULONG KmixerGlitches;
ULONG PortclsGlitches;
ULONG UsbaudioGlitches;
//ULONG Pad2;
//ULONG Pad3;
} DSHOW_PERF_COUNTERS, *PDSHOW_PERF_COUNTERS;
//
// Perfmon-related globals.
//
DSHOW_PERF_DATA_DEFINITION DshowPerfDataDefinition;
LONG OpenCount = 0; // Keeps track of how many threads have open ds counters.
LOGICAL Initialized = 0; // Fixes an initialization race condition.
//
// Function prototypes.
//
PM_OPEN_PROC PerfOpen;
PM_CLOSE_PROC PerfClose;
PM_COLLECT_PROC PerfCollect;
DWORD
WINAPI
MonitorThreadProc (
LPVOID Param
);
DWORD
WINAPI
ResetThreadProc (
LPVOID Param
);
VOID
TerminateLogging (
VOID
);
////////////////////////////////////////////////////////////////////////////
ULONG
APIENTRY
PerfOpen (
LPWSTR DevNames
)
/*++
Routine Description:
This routine initializes data collection.
Arguments:
DevNames - Supplies a REG_MULTISZ of object IDs of the devices to be opened.
Return Value:
ERROR_SUCCESS - OK.
<multiple failure codes> - initialization failed.
Note:
On remote connections, this function may be called more than once
by multiple threads.
--*/
{
PDSHOW_PERF_DATA_DEFINITION Def = &DshowPerfDataDefinition;
ULONG FirstCounter;
ULONG FirstHelp;
HKEY PerfKey;
LOGICAL WasInitialized;
ULONG Type;
ULONG Size;
LONG status;
//
// Initialize counters.
//
VideoGlitches = 0;
VideoGlitchesSinceLastMeasurement = 0;
VideoFrameRate = 0;
DsoundGlitches = 0;
KmixerGlitches = 0;
PortclsGlitches = 0;
UsbaudioGlitches = 0;
FramesRendered = 0;
NextJitterEntry = 0;
GetSystemTimeAsFileTime ((FILETIME*)&LastMeasurementTime);
//
// Since WinLogon is multithreaded and will call this routine in order to
// service remote performance queries, this library must keep track of how
// many threads have accessed it). The registry routines will limit access
// to the initialization routine to only one thread at a time.
//
WasInitialized = InterlockedCompareExchange (&Initialized, 0, 0);
if (!WasInitialized) {
//
// Create the monitor thread.
//
MonitorThread = CreateThread (NULL, 0, MonitorThreadProc, 0, 0, NULL);
if (MonitorThread == NULL) {
return GetLastError();
}
//
// Create the reset thread.
//
ResetThread = CreateThread (NULL, 0, ResetThreadProc, 0, 0, NULL);
if (ResetThread == NULL) {
return GetLastError();
}
//
// Get counter and help index base values from the registry.
//
status = RegOpenKeyEx (HKEY_LOCAL_MACHINE,
"SYSTEM\\CurrentControlSet\\Services\\DSPerf\\Performance",
0L, KEY_READ, &PerfKey);
if (status != ERROR_SUCCESS) {
return status;
}
Size = sizeof (ULONG);
status = RegQueryValueEx (PerfKey, "First Counter", 0L, &Type,
(LPBYTE) &FirstCounter, &Size);
if (status != ERROR_SUCCESS) {
RegCloseKey (PerfKey);
return status;
}
Size = sizeof (ULONG);
status = RegQueryValueEx (PerfKey, "First Help", 0L, &Type,
(LPBYTE) &FirstHelp, &Size);
if (status != ERROR_SUCCESS) {
RegCloseKey (PerfKey);
return status;
}
RegCloseKey (PerfKey);
//
// Fill the data definition structure.
//
Def->ObjectType.TotalByteLength = sizeof (DSHOW_PERF_DATA_DEFINITION) +
sizeof (DSHOW_PERF_COUNTERS);
Def->ObjectType.DefinitionLength = sizeof (DSHOW_PERF_DATA_DEFINITION);
Def->ObjectType.HeaderLength = sizeof (PERF_OBJECT_TYPE);
Def->ObjectType.ObjectNameTitleIndex = DSHOWPERF_OBJ + FirstCounter;
Def->ObjectType.ObjectNameTitle = NULL;
Def->ObjectType.ObjectHelpTitleIndex = DSHOWPERF_OBJ + FirstHelp;
Def->ObjectType.ObjectHelpTitle = NULL;
Def->ObjectType.DetailLevel = PERF_DETAIL_NOVICE;
Def->ObjectType.NumCounters = (sizeof (DSHOW_PERF_DATA_DEFINITION) -
sizeof (PERF_OBJECT_TYPE)) /
sizeof (PERF_COUNTER_DEFINITION);
Def->ObjectType.DefaultCounter = -1;
Def->ObjectType.NumInstances = PERF_NO_INSTANCES;
Def->ObjectType.CodePage = 0;
Def->ObjectType.PerfFreq.QuadPart = 10000000;
///
Def->VideoGlitches.ByteLength = sizeof (PERF_COUNTER_DEFINITION);
Def->VideoGlitches.CounterNameTitleIndex = DSHOWPERF_VIDEO_GLITCHES + FirstCounter;
Def->VideoGlitches.CounterNameTitle = NULL;
Def->VideoGlitches.CounterHelpTitleIndex = DSHOWPERF_VIDEO_GLITCHES + FirstHelp;
Def->VideoGlitches.CounterHelpTitle = NULL;
Def->VideoGlitches.DefaultScale = -1;
Def->VideoGlitches.DetailLevel = PERF_DETAIL_NOVICE;
Def->VideoGlitches.CounterType = PERF_COUNTER_RAWCOUNT;
Def->VideoGlitches.CounterSize = sizeof (ULONG);
Def->VideoGlitches.CounterOffset = FIELD_OFFSET (DSHOW_PERF_COUNTERS, VideoGlitches);
///
Def->VideoGlitchesPerSec.ByteLength = sizeof (PERF_COUNTER_DEFINITION);
Def->VideoGlitchesPerSec.CounterNameTitleIndex = DSHOWPERF_VIDEO_GLITCHES_SEC + FirstCounter;
Def->VideoGlitchesPerSec.CounterNameTitle = NULL;
Def->VideoGlitchesPerSec.CounterHelpTitleIndex = DSHOWPERF_VIDEO_GLITCHES_SEC + FirstHelp;
Def->VideoGlitchesPerSec.CounterHelpTitle = NULL;
Def->VideoGlitchesPerSec.DefaultScale = 0;
Def->VideoGlitchesPerSec.DetailLevel = PERF_DETAIL_NOVICE;
Def->VideoGlitchesPerSec.CounterType = PERF_COUNTER_RAWCOUNT;
Def->VideoGlitchesPerSec.CounterSize = sizeof (ULONG);
Def->VideoGlitchesPerSec.CounterOffset = FIELD_OFFSET (DSHOW_PERF_COUNTERS, VideoGlitchesPerSec);
///
Def->VideoFrameRate.ByteLength = sizeof (PERF_COUNTER_DEFINITION);
Def->VideoFrameRate.CounterNameTitleIndex = DSHOWPERF_FRAME_RATE + FirstCounter;
Def->VideoFrameRate.CounterNameTitle = NULL;
Def->VideoFrameRate.CounterHelpTitleIndex = DSHOWPERF_FRAME_RATE + FirstHelp;
Def->VideoFrameRate.CounterHelpTitle = NULL;
Def->VideoFrameRate.DefaultScale = 0;
Def->VideoFrameRate.DetailLevel = PERF_DETAIL_NOVICE;
Def->VideoFrameRate.CounterType = PERF_COUNTER_RAWCOUNT;
Def->VideoFrameRate.CounterSize = sizeof (ULONG);
Def->VideoFrameRate.CounterOffset = FIELD_OFFSET (DSHOW_PERF_COUNTERS, VideoFrameRate);
///
Def->VideoJitter.ByteLength = sizeof (PERF_COUNTER_DEFINITION);
Def->VideoJitter.CounterNameTitleIndex = DSHOWPERF_JITTER + FirstCounter;
Def->VideoJitter.CounterNameTitle = NULL;
Def->VideoJitter.CounterHelpTitleIndex = DSHOWPERF_JITTER + FirstHelp;
Def->VideoJitter.CounterHelpTitle = NULL;
Def->VideoJitter.DefaultScale = 1;
Def->VideoJitter.DetailLevel = PERF_DETAIL_NOVICE;
Def->VideoJitter.CounterType = PERF_COUNTER_RAWCOUNT;
Def->VideoJitter.CounterSize = sizeof (ULONG);
Def->VideoJitter.CounterOffset = FIELD_OFFSET (DSHOW_PERF_COUNTERS, VideoJitter);
///
Def->DsoundGlitches.ByteLength = sizeof (PERF_COUNTER_DEFINITION);
Def->DsoundGlitches.CounterNameTitleIndex = DSHOWPERF_DSOUND_GLITCHES + FirstCounter;
Def->DsoundGlitches.CounterNameTitle = NULL;
Def->DsoundGlitches.CounterHelpTitleIndex = DSHOWPERF_DSOUND_GLITCHES + FirstHelp;
Def->DsoundGlitches.CounterHelpTitle = NULL;
Def->DsoundGlitches.DefaultScale = -1;
Def->DsoundGlitches.DetailLevel = PERF_DETAIL_NOVICE;
Def->DsoundGlitches.CounterType = PERF_COUNTER_RAWCOUNT;
Def->DsoundGlitches.CounterSize = sizeof (ULONG);
Def->DsoundGlitches.CounterOffset = FIELD_OFFSET (DSHOW_PERF_COUNTERS, DsoundGlitches);
///
Def->KmixerGlitches.ByteLength = sizeof (PERF_COUNTER_DEFINITION);
Def->KmixerGlitches.CounterNameTitleIndex = DSHOWPERF_KMIXER_GLITCHES + FirstCounter;
Def->KmixerGlitches.CounterNameTitle = NULL;
Def->KmixerGlitches.CounterHelpTitleIndex = DSHOWPERF_KMIXER_GLITCHES + FirstHelp;
Def->KmixerGlitches.CounterHelpTitle = NULL;
Def->KmixerGlitches.DefaultScale = -1;
Def->KmixerGlitches.DetailLevel = PERF_DETAIL_NOVICE;
Def->KmixerGlitches.CounterType = PERF_COUNTER_RAWCOUNT;
Def->KmixerGlitches.CounterSize = sizeof (ULONG);
Def->KmixerGlitches.CounterOffset = FIELD_OFFSET (DSHOW_PERF_COUNTERS, KmixerGlitches);
///
Def->PortclsGlitches.ByteLength = sizeof (PERF_COUNTER_DEFINITION);
Def->PortclsGlitches.CounterNameTitleIndex = DSHOWPERF_PORTCLS_GLITCHES + FirstCounter;
Def->PortclsGlitches.CounterNameTitle = NULL;
Def->PortclsGlitches.CounterHelpTitleIndex = DSHOWPERF_PORTCLS_GLITCHES + FirstHelp;
Def->PortclsGlitches.CounterHelpTitle = NULL;
Def->PortclsGlitches.DefaultScale = -1;
Def->PortclsGlitches.DetailLevel = PERF_DETAIL_NOVICE;
Def->PortclsGlitches.CounterType = PERF_COUNTER_RAWCOUNT;
Def->PortclsGlitches.CounterSize = sizeof (ULONG);
Def->PortclsGlitches.CounterOffset = FIELD_OFFSET (DSHOW_PERF_COUNTERS, PortclsGlitches);
///
Def->UsbaudioGlitches.ByteLength = sizeof (PERF_COUNTER_DEFINITION);
Def->UsbaudioGlitches.CounterNameTitleIndex = DSHOWPERF_USBAUDIO_GLITCHES + FirstCounter;
Def->UsbaudioGlitches.CounterNameTitle = NULL;
Def->UsbaudioGlitches.CounterHelpTitleIndex = DSHOWPERF_USBAUDIO_GLITCHES + FirstHelp;
Def->UsbaudioGlitches.CounterHelpTitle = NULL;
Def->UsbaudioGlitches.DefaultScale = -1;
Def->UsbaudioGlitches.DetailLevel = PERF_DETAIL_NOVICE;
Def->UsbaudioGlitches.CounterType = PERF_COUNTER_RAWCOUNT;
Def->UsbaudioGlitches.CounterSize = sizeof (ULONG);
Def->UsbaudioGlitches.CounterOffset = FIELD_OFFSET (DSHOW_PERF_COUNTERS, UsbaudioGlitches);
}
InterlockedExchange (&Initialized, 1);
InterlockedIncrement (&OpenCount);
return ERROR_SUCCESS;
}
////////////////////////////////////////////////////////////////////////////
ULONG
APIENTRY
PerfClose (
VOID
)
/*++
Routine Description:
This routine cleans up after data collection.
Arguments:
None.
Return Value:
ERROR_SUCCESS.
Note:
On remote connections, this function may be called more than once
by multiple threads.
--*/
{
ULONG NewOpenCount;
NewOpenCount = InterlockedDecrement (&OpenCount);
if (NewOpenCount == 0) {
//
// Last thread has closed the counter. Perform cleanup here.
//
TerminateLogging();
}
return ERROR_SUCCESS;
}
////////////////////////////////////////////////////////////////////////////
ULONG
APIENTRY
PerfCollect (
IN LPWSTR ValueName,
IN OUT LPVOID* PData,
IN OUT LPDWORD TotalBytes,
OUT LPDWORD NumObjectTypes
)
/*++
Routine Description:
This routine provides perf mon data.
Arguments:
ValueName - Supplies a string specified by the performance monitor program
in a call to the RegQueryValueEx function.
PData - Supplies the address of the buffer to receive the completed
PERF_DATA_BLOCK and subordinate structures. This routine will
append its data to the buffer starting at the point referenced
by *PData.
Receives the pointer to the first byte after the data structure
added by this routine.
TotalBytes - Supplies the size in bytes of the buffer referenced by PData.
Receives the number of bytes added by this routine.
NumObjectTypes - Receives the number of objects added by this routine.
Return Value:
ERROR_MORE_DATA - if the buffer passed is too small to hold data.
ERROR_SUCCESS - if success or any other error.
Errors are also reported to the event log. AZFIX
--*/
{
PDSHOW_PERF_DATA_DEFINITION PerfDataDefinition;
PDSHOW_PERF_COUNTERS PerfCounters;
FILETIME FileTime;
ULONG SpaceNeeded;
SpaceNeeded = sizeof (DSHOW_PERF_DATA_DEFINITION) +
sizeof (DSHOW_PERF_COUNTERS);
if (!Initialized) {
*TotalBytes = 0;
*NumObjectTypes = 0;
return ERROR_SUCCESS; // This is OK.
}
if (*TotalBytes < SpaceNeeded) {
*TotalBytes = 0;
*NumObjectTypes = 0;
return ERROR_MORE_DATA;
}
//
// Copy the object and counter definitions.
//
PerfDataDefinition = (PDSHOW_PERF_DATA_DEFINITION)(*PData);
RtlMoveMemory (PerfDataDefinition, &DshowPerfDataDefinition,
sizeof (DSHOW_PERF_DATA_DEFINITION));
GetSystemTimeAsFileTime (&FileTime);
RtlCopyMemory (&PerfDataDefinition->ObjectType.PerfTime.QuadPart,
&FileTime, sizeof (LONGLONG));
PerfDataDefinition->ObjectType.NumInstances = -1;
PerfDataDefinition->ObjectType.TotalByteLength = SpaceNeeded;
//
// Fill in counter data.
//
PerfCounters = (PDSHOW_PERF_COUNTERS)(PerfDataDefinition + 1);
PerfCounters->CounterBlock.ByteLength = sizeof (DSHOW_PERF_COUNTERS);
PerfCounters->VideoGlitches = VideoGlitches;
PerfCounters->VideoGlitchesPerSec = VideoGlitchesPerSec;
PerfCounters->VideoFrameRate = VideoFrameRate;
PerfCounters->VideoJitter = VideoJitter;
PerfCounters->DsoundGlitches = DsoundGlitches;
PerfCounters->KmixerGlitches = KmixerGlitches;
PerfCounters->PortclsGlitches = PortclsGlitches;
PerfCounters->UsbaudioGlitches = UsbaudioGlitches;
//
// Update out parameters.
//
*PData = (PVOID)(PerfCounters + 1);
*TotalBytes = SpaceNeeded;
*NumObjectTypes = 1;
return ERROR_SUCCESS;
}
////////////////////////////////////////////////////////////////////////////
VOID
TerminateLogging (
VOID
)
{
ULONG status;
int i;
struct EVENT_TRACE_INFO {
EVENT_TRACE_PROPERTIES TraceProperties;
char Logger[256];
char LogFileName[256];
} Info;
ZeroMemory (&Info, sizeof (Info));
Info.TraceProperties.LoggerNameOffset = sizeof (EVENT_TRACE_PROPERTIES);
Info.TraceProperties.LogFileNameOffset = sizeof (EVENT_TRACE_PROPERTIES) + 256;
Info.TraceProperties.Wnode.BufferSize = sizeof (Info);
ControlTrace (0, "DSPerf", &Info.TraceProperties, EVENT_TRACE_CONTROL_QUERY);
ControlTraceA (LoggerHandle, NULL, &Info.TraceProperties, EVENT_TRACE_CONTROL_STOP);
if (MonitorThread != NULL) {
EnableTrace (FALSE, 0, 0, &ControlGuid, LoggerHandle);
TerminateThread (MonitorThread, 0);
}
if (ResetThread != NULL) {
TerminateThread (ResetThread, 0);
}
for (i = 0; i < 100; i += 1) {
Sleep (50);
status = CloseTrace (ConsumerHandle);
if (status == ERROR_SUCCESS) {
break;
}
}
EnableTrace (FALSE, 0, 0, &ControlGuid, LoggerHandle);
}
////////////////////////////////////////////////////////////////////////////
VOID
WINAPI
EventCallback (
IN PEVENT_TRACE Event
)
{
PPERFINFO_DSHOW_AVREND PerfInfoAvRend;
PPERFINFO_DSHOW_AUDIOGLITCH PerfInfoAudioGlitch;
ULONG i;
LONGLONG PresentationDelta;
if (IsEqualGUID (Event->Header.Guid, GUID_VIDEOREND)) {
FramesRendered += 1;
PerfInfoAvRend = (PPERFINFO_DSHOW_AVREND)Event->MofData;
PresentationDelta = PerfInfoAvRend->dshowClock - PerfInfoAvRend->sampleTime;
FrameJitterHistory[NextJitterEntry] = PresentationDelta;
if (NextJitterEntry < JITTER_HISTORY_BUFFER_SIZE - 1) {
NextJitterEntry += 1;
}
if (labs ((int)PresentationDelta) > GLITCH_THRESHOLD) {
//
// Video glitch.
//
VideoGlitches += 1;
VideoGlitchesSinceLastMeasurement += 1;
}
}
else if (IsEqualGUID (Event->Header.Guid, GUID_DSOUNDGLITCH)) {
PerfInfoAudioGlitch = (PPERFINFO_DSHOW_AUDIOGLITCH)Event->MofData;
if (PerfInfoAudioGlitch->glitchType == 1) {
DsoundGlitches += 1;
}
}
else if (IsEqualGUID (Event->Header.Guid, KmixerGuid)) {
PerfInfoAudioGlitch = (PPERFINFO_DSHOW_AUDIOGLITCH)Event->MofData;
KmixerGlitches += 1;
}
else if (IsEqualGUID (Event->Header.Guid, PortclsGuid)) {
PerfInfoAudioGlitch = (PPERFINFO_DSHOW_AUDIOGLITCH)Event->MofData;
PortclsGlitches += 1;
}
else if (IsEqualGUID (Event->Header.Guid, UsbaudioGuid)) {
PerfInfoAudioGlitch = (PPERFINFO_DSHOW_AUDIOGLITCH)Event->MofData;
UsbaudioGlitches += 1;
}
}
////////////////////////////////////////////////////////////////////////////
ULONG
WINAPI
BufferCallback (
PEVENT_TRACE_LOGFILE Log
)
{
ULONGLONG CurrentTime;
double TimeDelta;
double JitterMean;
double Jitter;
double x;
ULONG i;
//
// Extend the reset timer (indirectly).
//
GetSystemTimeAsFileTime ((FILETIME*)&LastBufferFlushTime);
//
// Calculate rates.
//
GetSystemTimeAsFileTime ((FILETIME*)&CurrentTime);
TimeDelta = (double)(CurrentTime - LastMeasurementTime) / 10000000.0L;
if (CurrentTime > LastMeasurementTime) {
VideoGlitchesPerSec = (ULONG)((double)VideoGlitchesSinceLastMeasurement / TimeDelta);
VideoFrameRate = (ULONG)((double)FramesRendered / TimeDelta);
}
else {
VideoGlitchesPerSec = 0;
VideoFrameRate = 0;
}
//
// Calculate jitter.
//
if (NextJitterEntry > 1) {
JitterMean = 0.0L;
for (i = 0; i < NextJitterEntry; i += 1) {
JitterMean += (double)FrameJitterHistory[i];
}
JitterMean /= (double)NextJitterEntry;
Jitter = 0.0L;
for (i = 0; i < NextJitterEntry; i += 1) {
x = (double)FrameJitterHistory[i] - JitterMean;
Jitter += (x * x);
}
Jitter /= (double)(NextJitterEntry - 1);
Jitter = sqrt (Jitter) / 10000.0L;
VideoJitter = (ULONG)Jitter;
}
else {
VideoJitter = 0;
}
LastMeasurementTime = CurrentTime;
VideoGlitchesSinceLastMeasurement = 0;
FramesRendered = 0;
NextJitterEntry = 0;
return TRUE;
}
////////////////////////////////////////////////////////////////////////////
DWORD
WINAPI
MonitorThreadProc (
LPVOID Param
)
{
struct EVENT_TRACE_INFO {
EVENT_TRACE_PROPERTIES TraceProperties;
char Logger[256];
} Info;
UNREFERENCED_PARAMETER (Param);
ULONG status;
//
// Start the controller.
//
ZeroMemory (&Info, sizeof (Info));
Info.TraceProperties.Wnode.BufferSize = sizeof (Info);
Info.TraceProperties.Wnode.Flags = WNODE_FLAG_TRACED_GUID;
Info.TraceProperties.Wnode.Guid = ControlGuid;
Info.TraceProperties.BufferSize = 4096;
Info.TraceProperties.MinimumBuffers = 8;
Info.TraceProperties.MaximumBuffers = 16;
Info.TraceProperties.LogFileMode = EVENT_TRACE_REAL_TIME_MODE;
Info.TraceProperties.FlushTimer = 1;
Info.TraceProperties.EnableFlags = 1;
Info.TraceProperties.AgeLimit = 1;
Info.TraceProperties.LoggerNameOffset = sizeof (Info.TraceProperties);
strcpy (Info.Logger, "DSPerf");
status = StartTrace (&LoggerHandle, "DSPerf", &Info.TraceProperties);
if (status != ERROR_SUCCESS) {
return 0;
}
status = EnableTrace (TRUE, 0x1f, 0, &ControlGuid, LoggerHandle);
if (status != ERROR_SUCCESS) {
return 0;
}
//
// Start the consumer.
//
ZeroMemory (&Logfile, sizeof (Logfile));
Logfile.LoggerName = "DSPerf";
Logfile.LogFileMode = EVENT_TRACE_REAL_TIME_MODE;
Logfile.BufferCallback = BufferCallback;
Logfile.EventCallback = EventCallback;
ConsumerHandle = OpenTrace (&Logfile);
if (ConsumerHandle == (TRACEHANDLE)INVALID_HANDLE_VALUE) {
return 0;
}
//
// Consume. This call returns when logging is stopped.
//
status = ProcessTrace (&ConsumerHandle, 1, NULL, NULL);
if (status != ERROR_SUCCESS) {
return 1;
}
return 1;
}
////////////////////////////////////////////////////////////////////////////
DWORD
WINAPI
ResetThreadProc (
LPVOID Param
)
{
ULONGLONG Time;
for (;;) {
Sleep (500);
GetSystemTimeAsFileTime ((FILETIME*)&Time);
if (Time - LastBufferFlushTime > 15000000I64) {
FramesRendered = 0;
NextJitterEntry = 0;
VideoGlitchesPerSec = 0;
VideoFrameRate = 0;
VideoJitter = 0;
}
}
}