public override PopTimeline.StreamDataItem GetNearestOrNextStreamData(PopTimeline.DataStreamMeta _StreamMeta, ref PopTimeline.TimeUnit Time)
{
var StreamMeta = (VideoStreamMeta)_StreamMeta;
var BlockStream = VideoStreams[StreamMeta.StreamIndex];
var NextData = BlockStream.GetNearestStreamDataGreaterThanEqual(Time);
var Next = NextData.Value;
Time = Next.GetStartTime();
return(Next);
}
public override PopTimeline.StreamDataItem GetNearestOrPrevStreamData(PopTimeline.DataStreamMeta _StreamMeta, ref PopTimeline.TimeUnit Time)
{
var StreamMeta = (VideoStreamMeta)_StreamMeta;
var BlockStream = VideoStreams[StreamMeta.StreamIndex];
var PrevData = BlockStream.GetNearestStreamDataLessThanEqual(Time);
var Prev = PrevData.Value;
Time = Prev.GetStartTime();
return(Prev);
}
public override List <PopTimeline.StreamDataItem> GetStreamData(PopTimeline.DataStreamMeta _StreamMeta, PopTimeline.TimeUnit MinTime, PopTimeline.TimeUnit MaxTime)
{
var StreamMeta = (VideoStreamMeta)_StreamMeta;
var BlockStream = VideoStreams[StreamMeta.StreamIndex];
var Data = new List <PopTimeline.StreamDataItem>();
var Blocks = BlockStream.Blocks;
if (Blocks.Count == 0)
{
return(Data);
}
// find start with binary chop.
// find TAIL and work backwards as nearestprev will be last time, but if we do min we can start out of range
System.Func <int, VideoPacket> GetAt = (Index) =>
{
return(Blocks[Index]);
};
System.Func <VideoPacket, BinaryChop.CompareDirection> Compare = (OtherBlock) =>
{
return(OtherBlock.GetTimeDirection(MaxTime));
};
int?MaxMatch;
int?MaxNearestPrev;
BinaryChop.Search(0, Blocks.Count - 1, GetAt, Compare, out MaxNearestPrev, out MaxMatch);
int Last = MaxNearestPrev.Value;
// go earlier
for (int b = Last; b >= 0; b--)
{
var Block = Blocks[b];
var CompareDir = Block.GetTimeDirection(MinTime);
// if min time is AFTER block, block is before min
if (CompareDir == BinaryChop.CompareDirection.After)
{
break;
}
Data.Insert(0, Block);
}
return(Data);
}
public StreamAndTime(DataStreamMeta Stream, TimeUnit Time)
{
this.Stream = Stream;
this.Time = Time;
}
public abstract StreamDataItem GetNearestOrNextStreamData(DataStreamMeta StreamMeta, ref TimeUnit Time);
public abstract List <StreamDataItem> GetStreamData(DataStreamMeta StreamMeta, TimeUnit MinTime, TimeUnit MaxTime);