[Mxflib-developers] Event Tracks

[Oliver M. <ol...@me...>]

Matt:

at the moment, we have Timeline Tracks and Static Tracks, no Event
Tracks

class Package contains:

//! Add a timeline track to the package
TrackPtr AddTrack(ULPtr DataDef, Uint32 TrackNumber, Rational EditRate,
std::string TrackName = "", Uint32 TrackID = 0);

//! Add a static track to the package
TrackPtr AddTrack(ULPtr DataDef, Uint32 TrackNumber, std::string
TrackName = "", Uint32 TrackID = 0);


and then specifically for DM:


TrackPtr AddDMTrack(Rational EditRate, std::string TrackName =
"Descriptive Track", Uint32 TrackID = 0);
TrackPtr AddDMTrack(Uint32 TrackNumber, Rational EditRate, std::string
TrackName = "Descriptive Track", Uint32 TrackID = 0)

// Add a STATIC DM Track
TrackPtr AddDMTrack(std::string TrackName = "Descriptive Track", Uint32
TrackID = 0);
TrackPtr AddDMTrack(Uint32 TrackNumber, std::string TrackName =
"Descriptive Track", Uint32 TrackID = 0);



I propose adding:

const Int64 EventUnspecified = -1;
const Int64 EventInstantaneous = 0;

//! Add an event track to the package
TrackPtr AddTrack(ULPtr DataDef, Uint32 TrackNumber, Rational EditRate,
Int64 DefaultDuration = EventUnspecified, std::string TrackName = "",
Uint32 TrackID = 0);

/* this has 6 arguments to distinguish it from the others.

the default value of DefaultDuration is the const EventUnspecified which
has the distinguished value, and (I suppose) should be used when adding
a DMSegment, if SetDuration() has not been called. */

// Add an EVENT DM Track
TrackPtr AddDMTrack(Rational EditRate, Int64 DefaultDuration =
EventUnspecified, std::string TrackName = "Descriptive Track", Uint32
TrackID = 0);
TrackPtr AddDMTrack(Uint32 TrackNumber, Rational EditRate, Int64
DefaultDuration = EventUnspecified, std::string TrackName = "Descriptive
Track", Uint32 TrackID = 0)





Does this work for you?
If so, when is the right moment to add to SF?
Should we make another release first (especially since asdcplib is now
building upon the current HEAD revision)?

thanks
Oliver