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//

//  File:       QTFrameStepper.h

//

//  Contains:   Functions to step frame-by-frame through a QuickTime movie.

//

//  Written by: Tim Monroe

//

//  Copyright:  © 1997 by Apple Computer, Inc., all rights reserved.

//

//  Change History (most recent first):

//

//     <1>      12/22/97    rtm     first file

//     

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//

// header files

//

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#ifndef __MOVIES__

#include <Movies.h>

#endif

#ifndef __FIXMATH__

#include <FixMath.h>

#endif

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//

// constants

//

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#define kBogusStartingTime  -1          // an invalid starting time

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//

// function prototypes

//

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static OSErr                QTStep_GetStartTimeOfFirstVideoSample (Movie theMovie, TimeValue *theTime);

static OSErr                QTStep_DrawVideoSampleAtTime (Movie theMovie, TimeValue theTime);

static OSErr                QTStep_DrawVideoSampleNextOrPrev (Movie theMovie, Fixed theRate);

OSErr                       QTStep_GoToFirstVideoSample (Movie theMovie);

OSErr                       QTStep_GoToNextVideoSample (Movie theMovie);

OSErr                       QTStep_GoToPrevVideoSample (Movie theMovie);

OSErr                       QTStep_MCGoToFirstVideoSample (MovieController theMC);

OSErr                       QTStep_MCGoToNextVideoSample (MovieController theMC);

OSErr                       QTStep_MCGoToPrevVideoSample (MovieController theMC);

long                        QTStep_GetFrameCount (Track theTrack);