166 lines
4.6 KiB
C++
166 lines
4.6 KiB
C++
/*==========================================================================
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*
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* Copyright (C) 1999 Microsoft Corporation. All Rights Reserved.
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*
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* File: timer.cpp
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* Content: Class to handle multimedia timers
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*
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* History:
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* Date By Reason
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* ==== == ======
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* 10/05/99 rodtoll Added DPF_MODNAMEs
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* 01/14/2000 rodtoll Updated to use DWORD_PTR to allow proper 64-bit operation
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*
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***************************************************************************/
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#include "dxvutilspch.h"
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// ORIGINAL HEADER:
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//
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// Timer.cpp
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//
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// This file is from the MSDN, Visual Studuio 6.0 Edition
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//
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// Article:
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// Streaming Wave Files With DirectSound
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//
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// Author:
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// Mark McCulley, Microsoft Corporation
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//
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#undef DPF_SUBCOMP
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#define DPF_SUBCOMP DN_SUBCOMP_VOICE
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static bool TimeKillSynchronousFlagAvailable( void );
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static MMRESULT CompatibleTimeSetEvent( UINT uDelay, UINT uResolution, LPTIMECALLBACK lpTimeProc, DWORD_PTR dwUser, UINT fuEvent );
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// constructor
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#undef DPF_MODNAME
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#define DPF_MODNAME "Timer::Timer"
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Timer::Timer (void)
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{
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DPFX(DPFPREP, DVF_INFOLEVEL, "Timer::Timer\n\r");
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m_nIDTimer = NULL;
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}
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// Destructor
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#undef DPF_MODNAME
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#define DPF_MODNAME "Timer::~Timer"
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Timer::~Timer (void)
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{
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DPFX(DPFPREP, DVF_INFOLEVEL, "Timer::~Timer\n\r");
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if (m_nIDTimer)
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{
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timeKillEvent (m_nIDTimer);
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}
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}
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// Create
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#undef DPF_MODNAME
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#define DPF_MODNAME "Timer::Create"
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BOOL Timer::Create (UINT nPeriod, UINT nRes, DWORD_PTR dwUser, TIMERCALLBACK pfnCallback)
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{
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BOOL bRtn = SUCCESS; // assume success
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DPFX(DPFPREP, DVF_INFOLEVEL, "Timer::Create\n\r");
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DNASSERT (pfnCallback);
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DNASSERT (nPeriod > 10);
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DNASSERT (nPeriod >= nRes);
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m_nPeriod = nPeriod;
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m_nRes = nRes;
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m_dwUser = dwUser;
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m_pfnCallback = pfnCallback;
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if ((m_nIDTimer = CompatibleTimeSetEvent (m_nPeriod, m_nRes, TimeProc, (DWORD_PTR) this, TIME_PERIODIC | TIME_KILL_SYNCHRONOUS)) == NULL)
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{
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bRtn = FAILURE;
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}
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return (bRtn);
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}
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/******************************************************************************
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CompatibleTimeSetEvent
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CompatibleTimeSetEvent() unsets the TIME_KILL_SYNCHRONOUS flag before calling
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timeSetEvent() if the current operating system does not support the
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TIME_KILL_SYNCHRONOUS flag. TIME_KILL_SYNCHRONOUS is supported on Windows XP and
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later operating systems.
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Parameters:
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- The same parameters as timeSetEvent(). See timeSetEvent()'s documentation in
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the Platform SDK for more information.
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Return Value:
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- The same return value as timeSetEvent(). See timeSetEvent()'s documentation in
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the Platform SDK for more information.
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******************************************************************************/
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MMRESULT CompatibleTimeSetEvent( UINT uDelay, UINT uResolution, LPTIMECALLBACK lpTimeProc, DWORD_PTR dwUser, UINT fuEvent )
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{
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static bool fCheckedVersion = false;
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static bool fTimeKillSynchronousFlagAvailable = false;
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if( !fCheckedVersion ) {
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fTimeKillSynchronousFlagAvailable = TimeKillSynchronousFlagAvailable();
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fCheckedVersion = true;
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}
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if( !fTimeKillSynchronousFlagAvailable ) {
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fuEvent = fuEvent & (TIME_ONESHOT |
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TIME_PERIODIC |
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TIME_CALLBACK_FUNCTION |
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TIME_CALLBACK_EVENT_SET |
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TIME_CALLBACK_EVENT_PULSE);
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}
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return timeSetEvent( uDelay, uResolution, lpTimeProc, dwUser, fuEvent );
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}
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bool TimeKillSynchronousFlagAvailable( void )
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{
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OSVERSIONINFO osverinfo;
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osverinfo.dwOSVersionInfoSize = sizeof(osverinfo);
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if( GetVersionEx( &osverinfo ) ) {
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// Windows XP's major version is 5 and its' minor version is 1.
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// timeSetEvent() started supporting the TIME_KILL_SYNCHRONOUS flag
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// in Windows XP.
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if( (osverinfo.dwMajorVersion > 5) ||
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( (osverinfo.dwMajorVersion == 5) && (osverinfo.dwMinorVersion >= 1) ) ) {
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return true;
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}
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}
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return false;
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}
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// Timer proc for multimedia timer callback set with timeSetTime().
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//
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// Calls procedure specified when Timer object was created. The
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// dwUser parameter contains "this" pointer for associated Timer object.
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//
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#undef DPF_MODNAME
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#define DPF_MODNAME "Timer::TimeProc"
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void CALLBACK Timer::TimeProc(UINT uID, UINT uMsg, DWORD_PTR dwUser, DWORD_PTR dw1, DWORD_PTR dw2)
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{
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// dwUser contains ptr to Timer object
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Timer * ptimer = (Timer *) dwUser;
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if( ptimer != NULL )
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{
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// Call user-specified callback and pass back user specified data
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(ptimer->m_pfnCallback) (ptimer->m_dwUser);
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}
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}
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