public void AddBlock(VideoPacket NewBlock)
{
// need to insert at the correct time
var Blocks = this.Blocks;
System.Func <int, VideoPacket> GetAt = (Index) =>
{
return(Blocks[Index]);
};
System.Func <VideoPacket, BinaryChop.CompareDirection> Compare = (OtherBlock) =>
{
//return OtherBlock.GetLineIndexDirection(NewBlock.StartLine);
return(OtherBlock.GetTimeDirection(NewBlock.GetStartTime()));
};
int?Match;
int?NearestPrev;
if (Blocks.Count == 0)
{
Match = null;
NearestPrev = -1;
}
else
{
BinaryChop.Search(0, Blocks.Count - 1, GetAt, Compare, out NearestPrev, out Match);
if (Match.HasValue)
{
throw new System.Exception("Block already exists in stream");
}
}
Blocks.Insert(NearestPrev.Value + 1, NewBlock);
}
public VideoPacket?GetNearestStreamDataLessThanEqual(PopTimeline.TimeUnit Time)
{
var Blocks = this.Blocks;
if (Blocks.Count == 0)
{
return(null);
}
System.Func <int, VideoPacket> GetAt = (Index) =>
{
return(Blocks[Index]);
};
System.Func <VideoPacket, BinaryChop.CompareDirection> Compare = (OtherBlock) =>
{
return(OtherBlock.GetTimeDirection(Time));
};
int?Match;
int?Nearest;
BinaryChop.Search(0, Blocks.Count - 1, GetAt, Compare, out Nearest, out Match);
// nothing at/before this time
if (Nearest.Value < 0)
{
return(null);
}
return(GetAt(Nearest.Value));
}
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);
}
void GetStreamDataIndex(PopTimeline.TimeUnit Time, out int?Match, out int?Nearest)
{
var Blocks = this.Blocks;
if (Blocks.Count == 0)
{
Match = null;
Nearest = null;
return;
}
System.Func <int, VideoPacket> GetAt = (Index) =>
{
return(Blocks[Index]);
};
System.Func <VideoPacket, BinaryChop.CompareDirection> Compare = (OtherBlock) =>
{
return(OtherBlock.GetTimeDirection(Time));
};
BinaryChop.Search(0, Blocks.Count - 1, GetAt, Compare, out Nearest, out Match);
}
public VideoPacket?GetNearestStreamDataGreaterThanEqual(PopTimeline.TimeUnit Time)
{
var Blocks = this.Blocks;
if (Blocks.Count == 0)
{
return(null);
}
System.Func <int, VideoPacket> GetAt = (Index) =>
{
return(Blocks[Index]);
};
System.Func <VideoPacket, BinaryChop.CompareDirection> Compare = (OtherBlock) =>
{
return(OtherBlock.GetTimeDirection(Time));
};
int?Match;
int?Nearest;
BinaryChop.Search(0, Blocks.Count - 1, GetAt, Compare, out Nearest, out Match);
if (Match.HasValue)
{
return(GetAt(Match.Value));
}
// next must the one after prev
var Next = Nearest.Value + 1;
if (Next >= Blocks.Count)
{
return(null);
}
return(GetAt(Next));
}