/// <summary>
/// merges the given Filterchain to the Filtergraph
/// </summary>
/// <param name="filterchain">the filterchain to be added to the filtergraph</param>
/// <param name="optionType">the option specifying how the merge should declare a winner</param>
public Filtergraph Merge(Filterchain filterchain, FFmpegMergeOptionType optionType)
{
var indexOfItem = IndexOf(filterchain);
if (indexOfItem != -1 && optionType == FFmpegMergeOptionType.NewWins)
{
FilterchainList.RemoveAt(indexOfItem);
filterchain.Owner = this;
FilterchainList.Insert(indexOfItem, filterchain);
}
else if (indexOfItem == -1)
{
Add(filterchain);
}
return(this);
}
public override string ToString()
{
//perform simple validation on filter graph
if (FilterchainList.Count == 0)
{
throw new InvalidOperationException("Filtergraph must contain at least one Filterchain.");
}
var filtergraph = new StringBuilder(100);
FilterchainList.ForEach(filterchain =>
{
if (filtergraph.Length > 0)
{
filtergraph.Append(";");
}
filtergraph.Append(filterchain.ToString());
});
//return the formatted filter command string
return(filtergraph.ToString());
}
/// <summary>
/// removes all the Filterchain matching the provided criteria
/// </summary>
/// <param name="pred">the predicate of required criteria</param>
public Filtergraph RemoveAll(Predicate <Filterchain> pred)
{
FilterchainList.RemoveAll(pred);
return(this);
}
/// <summary>
/// removes the Filterchain at the given index from the Filtergraph
/// </summary>
/// <param name="index">the index of the desired Filterchain to be removed from the Filtergraph</param>
public Filtergraph RemoveAt(int index)
{
FilterchainList.RemoveAt(index);
return(this);
}
/// <summary>
/// adds the given Filterchain to the Filtergraph
/// </summary>
/// <param name="filterchain">the filterchain to be added to the filtergraph</param>
public Filtergraph Add(Filterchain filterchain)
{
filterchain.Owner = this;
FilterchainList.Add(filterchain);
return(this);
}
public int IndexOf(Filterchain filterchain)
{
return(FilterchainList.FindIndex(f => f.Id == filterchain.Id));
}
public bool Contains(Filterchain filterchain)
{
return(FilterchainList.Any(f => f.Id == filterchain.Id));
}
