public override bool Navigate(Guid playbackId, NavigateCriteria navigateCriteria)
{
DateTime cur;
lock (_playbackLockObj)
{
if (!_playbackCursors.TryGetValue(playbackId, out cur))
{
throw new KeyNotFoundException(nameof(playbackId));
}
}
// TODO: implement below to do proper update of cursor
switch (navigateCriteria)
{
case NavigateCriteria.First:
break;
case NavigateCriteria.Last:
break;
case NavigateCriteria.Previous:
break;
case NavigateCriteria.Next:
break;
case NavigateCriteria.PreviousSequence:
break;
case NavigateCriteria.NextSequence:
break;
}
lock (_playbackLockObj)
{
_playbackCursors[playbackId] = cur;
}
return(true);
}
public override bool Navigate(Guid playbackId, NavigateCriteria navigateCriteria)
{
PlaybackSession session;
DateTime cur;
lock (_playbackLockObj)
{
if (!_playbackSessions.TryGetValue(playbackId, out session))
{
throw new KeyNotFoundException(nameof(playbackId));
}
}
cur = session.Cursor;
int sequenceNumber = session.SequenceNumber;
bool atVideo = IsAtVideo(cur);
Toolbox.Log.Trace("Navigate - " + navigateCriteria + ", From:" + cur.ToString("o"));
switch (navigateCriteria)
{
case NavigateCriteria.First:
cur = new DateTime(DateTime.UtcNow.Year, DateTime.UtcNow.Month, DateTime.UtcNow.Day);
break;
case NavigateCriteria.Last:
cur = DateTime.UtcNow;
break;
case NavigateCriteria.Previous:
cur = cur - _frameDistance;
if (!IsAtVideo(cur))
{
cur = PreviousSequence(cur);
sequenceNumber -= 1;
}
break;
case NavigateCriteria.Next:
if (atVideo)
{
cur = cur + _frameDistance;
if (!IsAtVideo(cur))
{
cur = NextSequence(cur);
sequenceNumber += 1;
}
}
else
{
cur = NextSequence(cur);
sequenceNumber += 1;
}
break;
case NavigateCriteria.PreviousSequence:
cur = PreviousSequence(cur);
sequenceNumber -= 1;
break;
case NavigateCriteria.NextSequence:
cur = NextSequence(cur);
sequenceNumber += 1;
break;
}
Toolbox.Log.Trace(" --- now at:{0}", cur.ToString("o"));
lock (_playbackLockObj)
{
session.Cursor = cur;
session.SequenceNumber = sequenceNumber;
}
return(true);
}
