QuickTime 4 Reference

Creating a Track Time Table

Listing 17 illustrates how to use the MakeTrackTimeTable function to create a time table for the tracks in a movie.

Listing 17 Creating a time table for movie tracks



 
OSErr       theErr = noErr;

WindowPtr   movieWindow = nil;

Movie       theMovie = nil;

Track       theTrack;

long        trackCount,

            trackIndex,

            retDataRefSkew;

TimeValue   startTime,

            endTime,

            timeIncrement;

short       firstDataRefIndex,

            lastDataRefIndex;

Handle      offsets,

            offsetsSet [32];



err = GetDisplayedMovie (&movieWindow, &theMovie);



timeIncrement = GetMovieTimeScale (theMovie);

firstDataRefIndex = -1;

lastDataRefIndex = -1;

trackCount = GetMovieTrackCount (theMovie);



for (trackIndex = 1; trackIndex <= trackCount; trackIndex++)

{

    theTrack = GetMovieIndTrack (theMovie, trackIndex);

    offsets = NewHandle (0);

    offsetsSet [trackIndex - 1] = offsets;

    startTime = GetTrackOffset (theTrack);

    endTime = GetTrackDuration (theTrack);

    err = MakeTrackTimeTable (theTrack, (long **) offsets, 

                startTime, endTime, timeIncrement, 

                firstDataRefIndex, lastDataRefIndex, &retDataRefSkew);

}



// dispose handles

for (trackIndex = 1; trackIndex <= trackCount; trackIndex++)

{

    DisposeHandle (offsetsSet [trackIndex - 1]);

}