private int NextFragment(int prevfragment)
{
if (prevfragment == FragmentCount)
{
return(prevfragment);
}
prevfragment++;
Fragment f = FragmentFromFragmentNumber(prevfragment);
if (f.DiscontinuityIndicator.HasValue)
{
int idx = FragmentTables.IndexOf(f) + 1;
prevfragment = idx < FragmentTables.Count ? FragmentTables.ElementAt(idx).Value.FirstFragment : FragmentCount;
}
return(prevfragment);
}
private Fragment FragmentFromFragmentNumber(int fragment)
{
if (FragmentTables.Count == 1)
{
return(FragmentTables.ElementAt(0).Value);
}
for (int x = 0; x < FragmentTables.Count - 1; x++)
{
Fragment cu = FragmentTables.ElementAt(x).Value;
Fragment ne = FragmentTables.ElementAt(x + 1).Value;
if (fragment >= cu.FirstFragment && fragment < ne.FirstFragment)
{
return(cu);
}
}
return(FragmentTables.ElementAt(FragmentTables.Count - 1).Value);
}
public void InitFragments()
{
Segment first_segment = SegmentTables[SegmentTables.Keys.Min()];
Segment last_segment = SegmentTables[SegmentTables.Keys.Max()];
Fragment first_fragment = FragmentTables[FragmentTables.Keys.Min()];
Fragment last_fragment = FragmentTables[FragmentTables.Keys.Max()];
if ((last_fragment.FragmentDuration == 0) && (last_fragment.DiscontinuityIndicator.HasValue && last_fragment.DiscontinuityIndicator == 0))
{
Live = false;
FragmentTables.Remove(FragmentTables.Keys.Max());
last_fragment = FragmentTables[FragmentTables.Keys.Max()];
}
InvalidFragCount = false;
Segment prev = null;
FragmentCount = 0;
foreach (int n in SegmentTables.Keys)
{
Segment seg = SegmentTables[n];
if (prev != null)
{
FragmentCount += (seg.FirstEntry - prev.FirstEntry - 1) * prev.NumFragments;
}
FragmentCount += seg.NumFragments;
prev = seg;
}
if ((FragmentCount & 0x80000000) != 0x80000000)
{
FragmentCount += first_fragment.FirstFragment - 1;
}
else
{
FragmentCount = 0;
InvalidFragCount = true;
}
if (FragmentCount < last_fragment.FirstFragment)
{
FragmentCount = last_fragment.FirstFragment;
}
if (SegmentStart == -1)
{
SegmentStart = Live ? last_segment.FirstEntry : first_segment.FirstEntry;
if (SegmentStart < 1)
{
SegmentStart = 1;
}
}
if (FragmentStart == -1)
{
if (Live && !InvalidFragCount)
{
FragmentStart = FragmentCount - 2;
}
else
{
FragmentStart = first_fragment.FirstFragment - 1;
if (FragmentStart < 0)
{
FragmentStart = 0;
}
}
}
}
