Masterclock TCR1000 Manual de usuario descargar pdf (Pagina 3)

TCR1000SDK–Rev.3.0.0   Page3

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Introduction

TheTCRSoftwareDevelopmentKit(SDK)isaWindowsdynamic‐linklibrary(DLL)whichdefinesan

applicationprogramminginterface(API)supportfilessotheDLLcanbeused.TheSDKforthe

TCR1000timecodereadercarddriveriscompatiblewithWindowsXP,Windows7,Server2003,and

Server2008.ThereDLLcomesintwoversions,oneforx32systemsandoneforx64systems.To

operate,theSDKrequiresaninstalledandcorrectlyfunctioningdriverfortheTCR1000timecode

readercard.

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TheSDKsupportsSMPTE(allformats)andIRIG(BandB1formats)timecodeoperation,and

automaticallydeterminesthecorrectinternaloperation.DatesupportisalsoprovidedforSMPTE

(Leitch

TM

format)andIRIG(IEEE1344).TheSDKalsoprovidesaccesstoallusergroups(SMPTE)and

controlfunctions(IRIG)forapplicationsthatrequireaccesstospecialinformationinthesefields.The

SDKalsoprovidesacallbackmechanismforTCR1000interrupts,whereapplicationscandefineuser‐

levelroutinesthatwillbeexecuted

whentheinterruptsoccur.

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TheSDKsupportstwomethodsofobtaining timecodefromtheTCR1000.The

TCR1000_ApiPollTimeCode()functionprovidesasimplisticbutlessaccuratemethodofobtaining

timecode.Theaccuracyofapolledtimecodeisonlyplusorminustheframerate(e.g.forSMPTE30

frames/secondtimecode,±33ms).TheSDKalsoprovidesanasynchronoustimenotification

mechanismwherebyauser‐suppliedcallbackfunctioniscalledwhensignificanteventsoccurduring

timecodedecodingoperation.Thetimeprovidedwithsucheventsistime‐stampedwiththe

Windowshigh‐performancetimeratthetimetheeventoccurs.Thetimestampcanthenbeusedto

deriveprecisereal‐timeinformation(+/‐2millesecond).[SeetheincludedVCSampledemonstration

applicationforanexampleofcomputinghigh‐precisiontime.]

AbbreviationsUsed

Thefollowingabbreviationsareusedinthisdocumentation:



API–TheapplicationprogramminginterfaceservicesprovidedbytheTCR.DLLlibrary

TCR1000–ReferstotheTCR1000timecodereadercard

SMPTE–SocietyofMotionPicture&TelevisionEngineers‐definedtimecodeformat

IRIG–RangeCommander’sCouncil/InterrangeInstrumentationGroup‐definedtimecodeformat

Windows–OneoftheMicrosoftWindowsoper atingsystems(XP,Windows7,Server2003,Server

2008)

Driver–TheTCR1000timecodereadercarddriverfortheWindowsoperationsystem.

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Recommendingreading:

• SMPTE12M‐TimeandControlCodeStandard

• RangeCommander’sCouncilIRIGStandard200‐95–SerialTimeCodeFormats

• IEEE1344‐1995–Timezone&dateencodingforIRIG‐BandIRIG‐B1timecodes

• Leitch

ApplicationNote–TimeCodeTutorial‐LongitudinalSMPTETimeCodeforNTSCColor

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