private IEnumerable <RiffElement> GetChildren(List <byte> bytes)
{
var result = new List <RiffElement>();
for (int i = 0; i < bytes.Count;)
{
int elementSize = GetInt32FromByteSequence(bytes.GetRange(i + 4, 4)) + 8;
if ((elementSize & 1) != 0)
{
elementSize++;
}
RiffElement element;
int startPosition = this.StartPosition + 12;
if (GetFourCCFromBytes(bytes.GetRange(i, 4)) == "LIST")
{
element = new RiffList(startPosition + i, this);
}
else
{
var id = GetFourCCFromBytes(bytes.GetRange(i, 4));
switch (id)
{
case "avih":
element = new RiffChunk <AviMainHeader>(startPosition + i, this);
break;
case "strh":
element = new RiffChunk <AviStreamHeader>(startPosition + i, this);
break;
default:
element = new RiffChunk <byte>(startPosition + i, this);
break;
}
}
element.Parse(bytes.GetRange(i, elementSize));
result.Add(element);
i += elementSize;
}
return(result);
}
private IEnumerable <RiffElement> GetChunk <T>(RiffList list) where T : struct
{
foreach (var child in list.Children)
{
if (child is RiffChunk <T> )
{
yield return(child);
}
}
foreach (var newList in list.Children.Where(x => x is RiffList))
{
var result = this.GetChunk <T>(newList as RiffList);
if (!result.Any())
{
break;
}
foreach (var element in result.ToList())
{
yield return(element);
}
}
}
public RiffList(int startPosition, RiffList parent) : base(startPosition, parent)
{
}
protected RiffElement(int startPosition, RiffList parent)
{
this.StartPosition = startPosition;
this.Parent = parent;
}
