otio.swift

class Marker {
}

class Element {
    var layers = [CGImage?]() // this will become an ImageIndex that refers to a jpg, tile, etc
    var markers = [Int]()
    var start_frame = Int(0)
    var end_frame_ex = Int(0)
    var in_frame = Int(0)
    var out_frame_ex = Int(0)
}

struct TrackIndex : Hashable {
    var i : Int
}
struct ElementIndex : Hashable {
    var i : Int
}
struct MarkerIndex : Hashable {
    var i : Int
}

@objc(Sequence) public
class Sequence : NSObject {
    // elements and markers are concrete
    var elements = [ElementIndex : Element]()
    var markers = [MarkerIndex : Marker]()

    // the sequence structure is encoded in this graph
    var tracks = [TrackIndex : [ElementIndex]]()
    var markerToElement = [MarkerIndex : ElementIndex]()
    var elementToTrack = [ElementIndex : TrackIndex]()

    override init() {}

    // a stub to stand in for the real application
    func addNewBoardAndSketch(_ : Int?) {}

    // render the sequence into an interval tree
    // it's the composition as it existed at the time of iteration
    func sequence() -> AugmentedIntervalTree<Int, ElementIndex> {
        var r = AugmentedIntervalTree<Int, ElementIndex>()
        for (index, element) in elements {
            r.insert(Interval<Int, ElementIndex>(start: element.start_frame,
                                                 end: element.end_frame_ex,
                                                 data: index))
        }
        return r
    }

}