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timing.cpp
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timing.cpp
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/* kkapture: intrusive demo video capturing.
* Copyright (c) 2005-2010 Fabian "ryg/farbrausch" Giesen.
*
* This program is free software; you can redistribute and/or modify it under
* the terms of the Artistic License, Version 2.0beta5, or (at your opinion)
* any later version; all distributions of this program should contain this
* license in a file named "LICENSE.txt".
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT UNLESS REQUIRED BY
* LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER OR CONTRIBUTOR
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "stdafx.h"
#include "videocapturetimer.h"
#include "video.h"
#include <malloc.h>
#include <process.h>
#pragma comment(lib, "winmm.lib")
// events
static HANDLE nextFrameEvent = 0;
static HANDLE resyncEvent = 0;
static HANDLE noOneWaiting = 0;
static HANDLE stuckTimer = 0;
static HANDLE stuckThread = 0;
static HANDLE endStuckEvent = 0;
static LONGLONG perfFrequency = 0;
static volatile LONG resyncCounter = 0;
static volatile LONG waitCounter = 0;
// trampolines
static BOOL (__stdcall *Real_QueryPerformanceFrequency)(LARGE_INTEGER *lpFrequency) = QueryPerformanceFrequency;
static BOOL (__stdcall *Real_QueryPerformanceCounter)(LARGE_INTEGER *lpPerformaceCount) = QueryPerformanceCounter;
static DWORD (__stdcall *Real_GetTickCount)() = GetTickCount;
static DWORD (__stdcall *Real_timeGetTime)() = timeGetTime;
static MMRESULT (__stdcall *Real_timeGetSystemTime)(MMTIME *pmmt,UINT cbmmt) = timeGetSystemTime;
VOID (__stdcall *Real_Sleep)(DWORD dwMilliseconds) = Sleep;
DWORD (__stdcall *Real_WaitForSingleObject)(HANDLE hHandle,DWORD dwMilliseconds) = WaitForSingleObject;
static DWORD (__stdcall *Real_WaitForMultipleObjects)(DWORD nCount,CONST HANDLE *lpHandles,BOOL bWaitAll,DWORD dwMilliseconds) = WaitForMultipleObjects;
static DWORD (__stdcall *Real_MsgWaitForMultipleObjects)(DWORD nCount,CONST HANDLE *lpHandles,BOOL bWaitAll,DWORD dwMilliseconds,DWORD dwWakeMask) = MsgWaitForMultipleObjects;
static void (__stdcall *Real_GetSystemTimeAsFileTime)(FILETIME *time) = GetSystemTimeAsFileTime;
static void (__stdcall *Real_GetSystemTime)(SYSTEMTIME *time) = GetSystemTime;
static MMRESULT (__stdcall *Real_timeSetEvent)(UINT uDelay,UINT uResolution,LPTIMECALLBACK fptc,DWORD_PTR dwUser,UINT fuEvent) = timeSetEvent;
static MMRESULT (__stdcall *Real_timeKillEvent)(UINT uTimerID) = timeKillEvent;
static UINT_PTR (__stdcall *Real_SetTimer)(HWND hWnd,UINT_PTR uIDEvent,UINT uElapse,TIMERPROC lpTimerFunc) = SetTimer;
// if timer functions are called frequently in a single frame, assume the app is waiting for the
// current time to change and advance it. this is the threshold for "frequent" calls.
static const LONG MAX_TIMERQUERY_PER_FRAME = 256*1024;
// timer seeds
static bool TimersSeeded = false;
static CRITICAL_SECTION TimerSeedLock;
static LARGE_INTEGER firstTimeQPC;
static DWORD firstTimeTGT;
static FILETIME firstTimeGSTAFT;
static volatile LONG timerHammeringCounter = 0;
static void seedAllTimers()
{
if(!TimersSeeded)
{
EnterCriticalSection(&TimerSeedLock);
if(!TimersSeeded)
{
Real_QueryPerformanceCounter(&firstTimeQPC);
firstTimeTGT = Real_timeGetTime();
Real_GetSystemTimeAsFileTime(&firstTimeGSTAFT);
// never actually mark timers as seeded in the first frame (i.e. before anything
// was presented) - you get problems with config dialogs etc. otherweise
TimersSeeded = getFrameTiming() != 0;
}
LeaveCriticalSection(&TimerSeedLock);
}
}
static int getFrameTimingAndSeed()
{
if(params.FrequentTimerCheck && InterlockedIncrement(&timerHammeringCounter) == MAX_TIMERQUERY_PER_FRAME)
{
printLog("timing: application is hammering timer calls, advancing time. (frame = %d)\n",getFrameTiming());
skipFrame();
}
int frame = getFrameTiming();
seedAllTimers();
return frame;
}
// actual timing functions
BOOL __stdcall Mine_QueryPerformanceFrequency(LARGE_INTEGER *lpFrequency)
{
if(lpFrequency)
lpFrequency->QuadPart = perfFrequency;
return TRUE;
}
BOOL __stdcall Mine_QueryPerformanceCounter(LARGE_INTEGER *lpCounter)
{
int frame = getFrameTimingAndSeed();
if(lpCounter)
lpCounter->QuadPart = firstTimeQPC.QuadPart + ULongMulDiv(perfFrequency,frame*frameRateDenom,frameRateScaled);
return TRUE;
}
DWORD __stdcall Mine_GetTickCount()
{
// before the first frame is finished, time still progresses normally
int frame = getFrameTimingAndSeed();
return firstTimeTGT + UMulDiv(frame,1000*frameRateDenom,frameRateScaled);
}
DWORD __stdcall Mine_timeGetTime()
{
int frame = getFrameTimingAndSeed();
return firstTimeTGT + UMulDiv(frame,1000*frameRateDenom,frameRateScaled);
}
MMRESULT __stdcall Mine_timeGetSystemTime(MMTIME *pmmt,UINT cbmmt)
{
return Real_timeGetSystemTime(pmmt,cbmmt);
}
void __stdcall Mine_GetSystemTimeAsFileTime(FILETIME *time)
{
int frame = getFrameTimingAndSeed();
LONGLONG baseTime = *((LONGLONG *) &firstTimeGSTAFT);
LONGLONG elapsedSince = ULongMulDiv(10000000,frame * frameRateDenom,frameRateScaled);
LONGLONG finalTime = baseTime + elapsedSince;
*((LONGLONG *) time) = finalTime;
}
void __stdcall Mine_GetSystemTime(SYSTEMTIME *time)
{
FILETIME filetime;
Mine_GetSystemTimeAsFileTime(&filetime);
FileTimeToSystemTime(&filetime,time);
}
// --- event timers
static const int MaxEventTimers = 256;
struct EventTimerDef
{
UINT Delay;
LPTIMECALLBACK Callback;
DWORD_PTR User;
UINT Flags;
int Counter;
bool Dead;
bool Used;
};
static EventTimerDef EventTimer[MaxEventTimers];
static CRITICAL_SECTION TimerAllocLock;
static MMRESULT __stdcall Mine_timeSetEvent(UINT uDelay,UINT uResolution,LPTIMECALLBACK fptc,DWORD_PTR dwUser,UINT fuEvent)
{
if(!uDelay) // don't even try to create a timer without delay
return 0;
EnterCriticalSection(&TimerAllocLock);
// try to find a free slot
int i;
for(i=0;i<MaxEventTimers;i++)
if(!EventTimer[i].Used)
break;
if(i == MaxEventTimers) // no free slot found
{
printLog("timing: OUT OF EVENT TIMER SLOTS.\n");
LeaveCriticalSection(&TimerAllocLock);
return 0;
}
// fill out timer struct
EventTimerDef *timer = &EventTimer[i];
timer->Delay = uDelay;
timer->Counter = uDelay;
timer->Callback = fptc;
timer->User = dwUser;
timer->Flags = fuEvent;
timer->Dead = false;
timer->Used = true;
LeaveCriticalSection(&TimerAllocLock);
return i + 1;
}
static MMRESULT __stdcall Mine_timeKillEvent(UINT uTimerID)
{
if(!uTimerID || uTimerID > MaxEventTimers)
return MMSYSERR_INVALPARAM;
EventTimerDef *timer = &EventTimer[uTimerID-1];
if(!timer->Used)
return MMSYSERR_INVALPARAM;
timer->Used = false;
return TIMERR_NOERROR;
}
static void FireTimer(UINT index)
{
EventTimerDef *timer = &EventTimer[index];
if(timer->Flags & TIME_CALLBACK_EVENT_SET)
SetEvent((HANDLE) timer->Callback);
else if(timer->Flags & TIME_CALLBACK_EVENT_PULSE)
PulseEvent((HANDLE) timer->Callback);
else // function
timer->Callback(index+1,0,timer->User,0,0);
}
static void ProcessEventTimers(int TimeElapsed)
{
EnterCriticalSection(&TimerAllocLock);
for(int i=0;i<MaxEventTimers;i++)
{
EventTimerDef *timer = &EventTimer[i];
if(timer->Used && !timer->Dead)
{
timer->Counter -= TimeElapsed;
while(timer->Counter <= 0)
{
FireTimer(i);
if(timer->Flags & TIME_PERIODIC)
timer->Counter += timer->Delay;
else
{
timer->Dead = true;
break;
}
}
}
}
LeaveCriticalSection(&TimerAllocLock);
}
// --- user32 timers
static UINT_PTR __stdcall Mine_SetTimer(HWND hWnd,UINT_PTR nIDEvent,UINT uElapse,TIMERPROC lpTimerFunc)
{
return Real_SetTimer(hWnd,nIDEvent,1,lpTimerFunc);
}
// --- wait scheduling
static void IncrementWaiting()
{
InterlockedIncrement(&waitCounter);
}
static void DecrementWaiting()
{
if(InterlockedDecrement(&waitCounter) == 0)
SetEvent(noOneWaiting);
}
// --- everything that sleeps may accidentially take more than one frame.
// this causes soundsystems to bug, so we have to fix it here.
VOID __stdcall Mine_Sleep(DWORD dwMilliseconds)
{
if(dwMilliseconds)
{
Real_WaitForSingleObject(resyncEvent,INFINITE);
IncrementWaiting();
if(params.MakeSleepsLastOneFrame)
Real_WaitForSingleObject(nextFrameEvent,dwMilliseconds);
else
Real_WaitForSingleObject(nextFrameEvent,params.SleepTimeout);
DecrementWaiting();
}
else
Real_Sleep(0);
}
DWORD __stdcall Mine_WaitForSingleObject(HANDLE hHandle,DWORD dwMilliseconds)
{
if(dwMilliseconds <= 0x7fffffff)
{
Real_WaitForSingleObject(resyncEvent,INFINITE);
IncrementWaiting();
HANDLE handles[] = { hHandle, nextFrameEvent };
DWORD result = Real_WaitForMultipleObjects(2,handles,FALSE,dwMilliseconds);
DecrementWaiting();
if(result == WAIT_OBJECT_0+1)
result = WAIT_TIMEOUT;
return result;
}
else
return Real_WaitForSingleObject(hHandle,dwMilliseconds);
}
DWORD __stdcall Mine_WaitForMultipleObjects(DWORD nCount,CONST HANDLE *lpHandles,BOOL bWaitAll,DWORD dwMilliseconds)
{
// infinite waits are always passed through
if(dwMilliseconds >= 0x7fffffff)
return Real_WaitForMultipleObjects(nCount,lpHandles,bWaitAll,dwMilliseconds);
else
{
// waitalls are harder to fake, so we just clamp them to timeout 0.
if(bWaitAll)
return Real_WaitForMultipleObjects(nCount,lpHandles,TRUE,0);
else
{
// we can't use new/delete, this might be called from a context
// where they don't work (such as after clib deinit)
HANDLE *handles = (HANDLE *) _alloca((nCount + 1) * sizeof(HANDLE));
memcpy(handles,lpHandles,nCount*sizeof(HANDLE));
handles[nCount] = nextFrameEvent;
Real_WaitForSingleObject(resyncEvent,INFINITE);
IncrementWaiting();
DWORD result = Real_WaitForMultipleObjects(nCount+1,handles,FALSE,dwMilliseconds);
if(result == WAIT_OBJECT_0+nCount)
result = WAIT_TIMEOUT;
DecrementWaiting();
return result;
}
}
}
DWORD __stdcall Mine_MsgWaitForMultipleObjects(DWORD nCount,CONST HANDLE *lpHandles,BOOL bWaitAll,DWORD dwMilliseconds,DWORD dwWakeMask)
{
// infinite waits are always passed through
if(dwMilliseconds >= 0x7fffffff)
return Real_MsgWaitForMultipleObjects(nCount,lpHandles,bWaitAll,dwMilliseconds,dwWakeMask);
else
{
// waitalls are harder to fake, so we just clamp them to timeout 0.
if(bWaitAll)
return Real_MsgWaitForMultipleObjects(nCount,lpHandles,TRUE,0,dwWakeMask);
else
{
// we can't use new/delete, this might be called from a context
// where they don't work (such as after clib deinit)
HANDLE *handles = (HANDLE *) _alloca((nCount + 1) * sizeof(HANDLE));
memcpy(handles,lpHandles,nCount*sizeof(HANDLE));
handles[nCount] = nextFrameEvent;
Real_WaitForSingleObject(resyncEvent,INFINITE);
IncrementWaiting();
DWORD result = Real_MsgWaitForMultipleObjects(nCount+1,handles,FALSE,dwMilliseconds,dwWakeMask);
if(result == WAIT_OBJECT_0+nCount)
result = WAIT_TIMEOUT;
DecrementWaiting();
return result;
}
}
}
static int currentFrame = 0;
static int realStartTime = 0;
static unsigned int __stdcall stuckThreadProc(void *arg)
{
HANDLE handles[2];
handles[0] = endStuckEvent;
handles[1] = stuckTimer;
while(Real_WaitForMultipleObjects(2,handles,FALSE,INFINITE) != WAIT_OBJECT_0)
{
printLog("timing: frame %d timed out, advancing time manually...\n", currentFrame);
skipFrame();
//nextFrame();
}
return 0;
}
void initTiming(bool interceptAnything)
{
timeBeginPeriod(1);
nextFrameEvent = CreateEvent(0,TRUE,FALSE,0);
resyncEvent = CreateEvent(0,TRUE,TRUE,0);
noOneWaiting = CreateEvent(0,TRUE,FALSE,0);
stuckTimer = CreateWaitableTimer(0,TRUE,0);
endStuckEvent = CreateEvent(0,TRUE,FALSE,0);
memset(EventTimer,0,sizeof(EventTimer));
InitializeCriticalSection(&TimerAllocLock);
InitializeCriticalSection(&TimerSeedLock);
LARGE_INTEGER freq;
QueryPerformanceFrequency(&freq);
perfFrequency = freq.QuadPart;
if(interceptAnything)
{
HookFunction(&Real_QueryPerformanceFrequency, Mine_QueryPerformanceFrequency);
HookFunction(&Real_QueryPerformanceCounter, Mine_QueryPerformanceCounter);
HookFunction(&Real_GetTickCount, Mine_GetTickCount);
HookFunction(&Real_timeGetTime, Mine_timeGetTime);
HookFunction(&Real_Sleep, Mine_Sleep);
HookFunction(&Real_WaitForSingleObject, Mine_WaitForSingleObject);
HookFunction(&Real_WaitForMultipleObjects, Mine_WaitForMultipleObjects);
HookFunction(&Real_MsgWaitForMultipleObjects, Mine_MsgWaitForMultipleObjects);
HookFunction(&Real_GetSystemTimeAsFileTime, Mine_GetSystemTimeAsFileTime);
HookFunction(&Real_GetSystemTime, Mine_GetSystemTime);
HookFunction(&Real_timeSetEvent, Mine_timeSetEvent);
HookFunction(&Real_timeKillEvent, Mine_timeKillEvent);
HookFunction(&Real_SetTimer, Mine_SetTimer);
}
stuckThread = (HANDLE) _beginthreadex(0,0,stuckThreadProc,0,0,0);
}
void doneTiming()
{
// terminate "stuck" thread
SetEvent(endStuckEvent);
Real_WaitForSingleObject(stuckThread,500);
CloseHandle(stuckThread);
CloseHandle(stuckTimer);
// make sure all currently active waits are finished
ResetEvent(resyncEvent);
SetEvent(nextFrameEvent);
if(waitCounter)
ResetEvent(noOneWaiting);
else
SetEvent(noOneWaiting);
while(Real_WaitForSingleObject(noOneWaiting,5) == WAIT_TIMEOUT)
if(!waitCounter)
break;
// these functions depend on critical sections that we're about to delete.
UnhookFunction(&Real_timeSetEvent);
UnhookFunction(&Real_timeKillEvent);
UnhookFunction(&Real_SetTimer);
EnterCriticalSection(&TimerAllocLock);
LeaveCriticalSection(&TimerAllocLock);
DeleteCriticalSection(&TimerAllocLock);
EnterCriticalSection(&TimerSeedLock);
TimersSeeded = true;
LeaveCriticalSection(&TimerSeedLock);
DeleteCriticalSection(&TimerSeedLock);
// we have to remove those, because code we call on deinitilization (especially directshow related)
// might be using them.
UnhookFunction(&Real_Sleep);
UnhookFunction(&Real_WaitForSingleObject);
UnhookFunction(&Real_WaitForMultipleObjects);
UnhookFunction(&Real_MsgWaitForMultipleObjects);
CloseHandle(nextFrameEvent);
CloseHandle(resyncEvent);
CloseHandle(noOneWaiting);
CloseHandle(endStuckEvent);
int runTime = Real_timeGetTime() - realStartTime;
timeEndPeriod(1);
if(runTime)
{
int rate = MulDiv(currentFrame,100*1000,runTime);
printLog("timing: %d.%02d frames per second on average\n",rate/100,rate%100);
}
}
void graphicsInitTiming()
{
if(params.EnableAutoSkip)
{
LARGE_INTEGER due;
due.QuadPart = -10*1000*__int64(params.FirstFrameTimeout);
SetWaitableTimer(stuckTimer,&due,0,0,0,FALSE);
}
}
void resetTiming()
{
currentFrame = 0;
}
void nextFrameTiming()
{
ResetEvent(resyncEvent);
SetEvent(nextFrameEvent);
if(waitCounter)
ResetEvent(noOneWaiting);
else
SetEvent(noOneWaiting);
while(Real_WaitForSingleObject(noOneWaiting,5) == WAIT_TIMEOUT)
if(!waitCounter)
break;
ResetEvent(nextFrameEvent);
SetEvent(resyncEvent);
DWORD oldFrameTime = UMulDiv(currentFrame,1000*frameRateDenom,frameRateScaled);
DWORD newFrameTime = UMulDiv(currentFrame+1,1000*frameRateDenom,frameRateScaled);
ProcessEventTimers(newFrameTime - oldFrameTime);
if(!currentFrame)
realStartTime = Real_timeGetTime();
if(params.EnableAutoSkip)
{
LARGE_INTEGER due;
due.QuadPart = -10*1000*__int64(params.FrameTimeout);
SetWaitableTimer(stuckTimer,&due,0,0,0,FALSE);
}
if(exitNextFrame)
{
printLog("main: clean exit requested, doing my best...\n");
ExitProcess(0);
}
// make sure there's always a message in the queue for next frame
// (some old hjb intros stop when there's no new messages)
PostMessage(GetForegroundWindow(),WM_NULL,0,0);
currentFrame++;
timerHammeringCounter = 0;
}
int getFrameTiming()
{
return currentFrame;
}