public AviHeaderList(TagLib.File file, long position, int length)
{
if (file == null)
{
throw new ArgumentNullException("file");
}
List list = new List(file, position, length);
if (!list.ContainsKey("avih"))
{
throw new CorruptFileException("Avi header not found.");
}
ByteVector header_data = list ["avih"][0];
if (header_data.Count != 0x38)
{
throw new CorruptFileException("Invalid header length.");
}
header = new AviHeader(header_data);
foreach (ByteVector list_data in list["LIST"])
{
if (list_data.StartsWith("strl"))
{
codecs.Add(AviStream.ParseStreamList(list_data).Codec);
}
}
}
public static AviStream ParseStreamList(ByteVector data)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
AviStream stream = null;
int pos = 4;
if (data.StartsWith("strl"))
{
while (pos + 8 < data.Count)
{
ByteVector id = data.Mid(pos, 4);
int block_length = (int)data.Mid(pos + 4, 4).ToUInt(false);
if (id == "strh" && stream == null)
{
AviStreamHeader stream_header = new AviStreamHeader(data, pos + 8);
if (stream_header.Type == "vids")
{
stream = new AviVideoStream(stream_header);
}
else if (stream_header.Type == "auds")
{
stream = new AviAudioStream(stream_header);
}
}
else if (stream != null)
{
stream.ParseItem(id, data, pos + 8, block_length);
}
pos += block_length + 8;
}
}
return(stream);
}
