public bool ReadPage(Page page)
{
if (page == null)
{
throw new ArgumentNullException("page");
}
ByteVector[] packets = page.Packets;
for (int i = 0; i < packets.Length; i++)
{
if ((((byte) (page.Header.Flags & PageFlags.FirstPacketContinued)) == 0) && (this.previous_packet != null))
{
if (this.ReadPacket(this.previous_packet))
{
return true;
}
this.previous_packet = null;
}
ByteVector data = packets[i];
if (((i == 0) && (((byte) (page.Header.Flags & PageFlags.FirstPacketContinued)) != 0)) && (this.previous_packet != null))
{
this.previous_packet.Add(data);
data = this.previous_packet;
}
this.previous_packet = null;
if (i == (packets.Length - 1))
{
this.previous_packet = new ByteVector(data);
}
else if (this.ReadPacket(data))
{
return true;
}
}
return false;
}
public Bitstream(Page page)
{
if (page == null)
{
throw new ArgumentNullException("page");
}
this.codec = TagLib.Ogg.Codec.GetCodec(page.Packets[0]);
this.first_absolute_granular_position = page.Header.AbsoluteGranularPosition;
}
public Bitstream (Page page)
{
if (page == null)
throw new ArgumentNullException ("page");
// Assume that the first packet is completely enclosed. This should be
// sufficient for codec recognition.
_codec = Codec.GetCodec (page.Packets [0]);
_first_absolute_granular_position = page.Header.AbsoluteGranularPosition;
}
public void AddPage (Page page)
{
pages_read ++;
if (first_page_header == null)
first_page_header = page.Header;
if (page.Packets.Length == 0)
return;
ByteVector[] page_packets = page.Packets;
for (int i = 0; i < page_packets.Length; i ++) {
if ((page.Header.Flags & PageFlags
.FirstPacketContinued) != 0 && i == 0 &&
packets.Count > 0)
packets [packets.Count - 1].Add (page_packets [0]);
else
packets.Add (page_packets [i]);
}
}
public bool ReadPage (Page page)
{
if (page == null)
throw new ArgumentNullException ("page");
ByteVector[] packets = page.Packets;
for (int i = 0; i < packets.Length; i ++)
{
if ((page.Header.Flags & PageFlags.FirstPacketContinued) == 0 && _previous_packet != null)
{
if (ReadPacket (_previous_packet))
return true;
_previous_packet = null;
}
ByteVector packet = packets [i];
// If we're at the first packet of the page, and we're continuing an
// old packet, combine the old with the new.
if (i == 0 && (page.Header.Flags & PageFlags.FirstPacketContinued) != 0 && _previous_packet != null)
{
_previous_packet.Add (packet);
packet = _previous_packet;
}
_previous_packet = null;
// If we're at the last packet of the page, store it.
if (i == packets.Length - 1)
_previous_packet = new ByteVector (packet);
// Otherwise, we need to process it.
else if (ReadPacket (packet))
return true;
}
return false;
}
public void AddPage(Page page)
{
this.pages_read++;
if (!this.first_page_header.HasValue)
{
this.first_page_header = new PageHeader?(page.Header);
}
if (page.Packets.Length != 0)
{
ByteVector[] packets = page.Packets;
for (int i = 0; i < packets.Length; i++)
{
if (((((byte) (page.Header.Flags & PageFlags.FirstPacketContinued)) != 0) && (i == 0)) && (this.packets.Count > 0))
{
this.packets[this.packets.Count - 1].Add(packets[0]);
}
else
{
this.packets.Add(packets[i]);
}
}
}
}
/// <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;
}
