public static VideoChunk First(VideoEvent @event)
{
if (@event.Type != VideoEventType.Add)
{
throw new InvalidOperationException($"Unexpected video event type '{@event.Type}'.");
}
return(new VideoChunk
{
Segments = new[] { @event.Segment },
StartTimestamp = @event.Timestamp,
});
}
public VideoChunk Next(VideoEvent @event)
{
StopTimestamp = @event.Timestamp;
switch (@event.Type)
{
case VideoEventType.Add:
return(new VideoChunk
{
Segments = Segments.Concat(new[] { @event.Segment }).ToArray(),
StartTimestamp = @event.Timestamp
});
case VideoEventType.Remove:
var segments = Segments.Where(x => x != @event.LastSegment).ToArray();
if (segments.Length == 0)
{
return(null);
}
return(new VideoChunk
{
Segments = segments,
StartTimestamp = @event.Timestamp
});
case VideoEventType.Update:
return(new VideoChunk
{
Segments = Segments.Where(x => x != @event.LastSegment).Concat(new[] { @event.Segment }).ToArray(),
StartTimestamp = @event.Timestamp
});
default:
throw new InvalidOperationException($"Unexpected video event type '{@event.Type}'.");
}
}