protected void ClearPageData()
{
streamSerialNumber = 0;
pages = new List <OggPage>(); //new ArrayList ();
firstPageHeader = null;
lastPageHeader = null;
packetToPageMap = new List <IntCollection>(); //new ArrayList();
dirtyPackets = new Dictionary <uint, ByteVector>(); //new Hashtable ();
dirtyPages = new IntCollection();
currentPage = null;
currentPacketPage = null;
currentPackets = null;
}
private void WritePageGroup(IntCollection page_group)
{
if (page_group.IsEmpty)
{
return;
}
ByteVectorCollection packets = new ByteVectorCollection();
// If the first page of the group isn'type dirty, append its partial content here.
if (!dirtyPages.Contains(((OggPage)this.pages[page_group[0]]).FirstPacketIndex))
{
packets.Add(((OggPage)this.pages[page_group[0]]).Packets[0]);
}
int previous_packet = -1;
int original_size = 0;
for (int i = 0; i < page_group.Count; i++)
{
int page = page_group[i];
uint first_packet = (uint)((OggPage)this.pages[page]).FirstPacketIndex;
uint last_packet = first_packet + ((OggPage)this.pages[page]).PacketCount - 1;
for (uint j = first_packet; j <= last_packet; j++)
{
if (i == page_group.Count - 1 && j == last_packet && !dirtyPages.Contains((int)j))
{
packets.Add(((OggPage)this.pages[page]).Packets[((OggPage)this.pages[page]).Packets.Count - 1]);
}
else if ((int)j != previous_packet)
{
previous_packet = (int)j;
packets.Add(GetPacket(j));
}
}
original_size += ((OggPage)this.pages[page]).Size;
}
bool continued = ((OggPage)this.pages[page_group[0]]).Header.FirstPacketContinued;
bool completed = ((OggPage)this.pages[page_group[page_group.Count - 1]]).Header.LastPacketCompleted;
// TODO: This pagination method isn'type accurate for what'field being done here.
// This should account for real possibilities like non-aligned packets and such.
OggPage[] pages = OggPage.Paginate(packets, PaginationStrategy.SinglePagePerGroup,
streamSerialNumber, page_group[0],
continued, completed);
ByteVector data = new ByteVector();
foreach (OggPage p in pages)
{
data.Add(p.Render());
}
// The insertion algorithms could also be improve to queue and prioritize data
// on the way out. Currently it requires rewriting the file for every page
// group rather than just once; however, for tagging applications there will
// generally only be one page group, so it'field not worth the time for the
// optimization at the moment.
Insert(data, ((OggPage)this.pages[page_group[0]]).FileOffset, original_size);
// Update the page index to include the pages we just created and to delete the
// old pages.
foreach (OggPage p in pages)
{
int index = p.Header.PageSequenceNumber;
this.pages[index] = p;
}
}
public IntCollection(IntCollection numbers)
{
Add(numbers);
}
