/// <summary>
/// Reads the file until all streams have finished their
/// property and tagging data.
/// </summary>
/// <param name="pages">
/// A <see cref="T:System.Collections.Generic.List`1"/>
/// object to be filled with <see cref="Page" /> objects as
/// they are read, or <see langword="null"/> if the pages
/// are not to be stored.
/// </param>
/// <param name="end">
/// A <see cref="long" /> value reference to be updated to
/// the postion of the first page not read by the current
/// instance.
/// </param>
/// <returns>
/// A <see cref="T:System.Collections.Generic.Dictionary`2"
/// /> object containing stream serial numbers as the keys
/// <see cref="Bitstream" /> objects as the values.
/// </returns>
private Dictionary<uint, Bitstream> ReadStreams (List<Page> pages,
out long end)
{
Dictionary<uint, Bitstream> streams =
new Dictionary<uint, Bitstream> ();
List<Bitstream> active_streams = new List<Bitstream> ();
long position = 0;
do {
Bitstream stream = null;
Page page = new Page (this, position);
if ((page.Header.Flags &
PageFlags.FirstPageOfStream) != 0) {
stream = new Bitstream (page);
streams.Add (page.Header
.StreamSerialNumber, stream);
active_streams.Add (stream);
}
if (stream == null)
stream = streams [
page.Header.StreamSerialNumber];
if (active_streams.Contains (stream)
&& stream.ReadPage (page))
active_streams.Remove (stream);
if (pages != null)
pages.Add (page);
position += page.Size;
} while (active_streams.Count > 0);
end = position;
return streams;
}
private Dictionary<uint, Bitstream> ReadStreams(List<Page> pages, out long end)
{
Dictionary<uint, Bitstream> dictionary = new Dictionary<uint, Bitstream>();
List<Bitstream> list = new List<Bitstream>();
long position = 0L;
do
{
Bitstream bitstream = null;
Page page = new Page(this, position);
if (((byte) (page.Header.Flags & PageFlags.FirstPageOfStream)) != 0)
{
bitstream = new Bitstream(page);
dictionary.Add(page.Header.StreamSerialNumber, bitstream);
list.Add(bitstream);
}
if (bitstream == null)
{
bitstream = dictionary[page.Header.StreamSerialNumber];
}
if (list.Contains(bitstream) && bitstream.ReadPage(page))
{
list.Remove(bitstream);
}
if (pages != null)
{
pages.Add(page);
}
position += page.Size;
}
while (list.Count > 0);
end = position;
return dictionary;
}
