59 lines
1.1 KiB
C++
59 lines
1.1 KiB
C++
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//
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// Multimedia timer support
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//
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#include "DebugOut.h"
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#include "MMTimer.h"
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// <20>R<EFBFBD><52><EFBFBD>X<EFBFBD>g<EFBFBD><67><EFBFBD>N<EFBFBD>^/<2F>f<EFBFBD>X<EFBFBD>g<EFBFBD><67><EFBFBD>N<EFBFBD>^<5E>ׂ̈̃C<CC83><43><EFBFBD>X<EFBFBD>^<5E><><EFBFBD>X
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static CMMTimer MMTimer;
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BOOL CMMTimer::m_bInitialize = FALSE;
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BOOL CMMTimer::m_bHigh = FALSE;
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SQWORD CMMTimer::m_hpFrequency = 0;
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CMMTimer::CMMTimer()
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{
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// 1ms<6D>P<EFBFBD>ʂ<EFBFBD><CA82>ۏ<DB8F><D882><EFBFBD><EFBFBD>ׂ<EFBFBD><D782><EFBFBD><EFBFBD>ɌĂԁc<D481>Ȃイ<F182BF82>d<EFBFBD>l<EFBFBD><6C><EFBFBD><EFBFBD>
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if( !m_bInitialize ) {
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if( ::timeBeginPeriod( 1 ) == TIMERR_NOERROR )
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m_bInitialize = TRUE;
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}
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// <20>n<EFBFBD>C<EFBFBD>p<EFBFBD>t<EFBFBD>H<EFBFBD>[<5B>}<7D><><EFBFBD>X<EFBFBD>J<EFBFBD>E<EFBFBD><45><EFBFBD>^<5E>ł̎<C582><CC8E>Ԍv<D48C><76><EFBFBD>p
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if( ::QueryPerformanceFrequency( (LARGE_INTEGER*)&m_hpFrequency ) ) {
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DEBUGOUT( "CMMTimer:Use high performance counter.(QueryPerformanceCounter)\n" );
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m_bHigh = TRUE;
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}
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}
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CMMTimer::~CMMTimer()
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{
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if( m_bInitialize ) {
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::timeEndPeriod( 1 );
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m_bInitialize = FALSE;
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}
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}
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SQWORD CMMTimer::GetMMTimer()
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{
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if( m_bHigh ) {
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SQWORD freq;
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::QueryPerformanceCounter( (LARGE_INTEGER*)&freq );
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return freq;
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}
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return (SQWORD)::timeGetTime();
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}
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FLOAT CMMTimer::CalcTimeDifference( SQWORD t0, SQWORD t1 )
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{
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if( m_bHigh ) {
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return (FLOAT)(1000.0*(double)(t1-t0)/(double)m_hpFrequency);
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}
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return (FLOAT)(t1-t0)*1000.0f;
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}
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