void OnTimeSelected(PopTimeline.TimeUnit SelectedTime)
{
// find keyframe closest to time
var VideoStream = Sink.GetVideoStream(VideoStreamName);
var Packet = VideoStream.GetNearestStreamDataLessThanEqual(SelectedTime);
// todo: avoid infinite loop properly
var InfLoopCheck = 1000;
while (Packet.HasValue && --InfLoopCheck > 0)
{
if (Packet.Value.Sample.IsKeyframe)
{
break;
}
// look for previous
var PrevTime = new PopTimeline.TimeUnit(Packet.Value.GetStartTime().Time - 1);
Packet = VideoStream.GetNearestStreamDataLessThanEqual(PrevTime);
}
if (InfLoopCheck <= 0)
{
Packet = null;
}
if (Packet == null)
{
throw new System.Exception("Failed to find keyframe before " + SelectedTime);
}
var HeaderData = VideoStream.TrackMeta.SampleDescriptions[0].Data;
var PacketData = Sink.GetFileData(Packet.Value.Sample.DataPosition, Packet.Value.Sample.DataSize);
// just h264 current expects annexb format. Mp4 is probably in AVCC (see meta!)
HeaderData = PopX.H264.GetH264AnnexB(HeaderData);
PacketData = PopX.H264.GetH264AnnexB(PacketData);
OnH264Data.Invoke(HeaderData, PacketData);
}
