public void Remove()
{
ByteVectorCollection list = BuildList();
list.Remove("DEF");
Assert.AreEqual("ABCGHI", list.ToByteVector("").ToString());
}
/// <summary>
/// Replaces the comment packet in a collection of packets
/// with the rendered version of a Xiph comment or inserts a
/// comment packet if the stream lacks one.
/// </summary>
/// <param name="packets">
/// A <see cref="ByteVectorCollection" /> object containing
/// a collection of packets.
/// </param>
/// <param name="comment">
/// A <see cref="XiphComment" /> object to store the rendered
/// version of in <paramref name="packets" />.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="packets" /> or <paramref name="comment"
/// /> is <see langword="null" />.
/// </exception>
public override void SetCommentPacket(ByteVectorCollection packets,
XiphComment comment)
{
if (packets == null)
{
throw new ArgumentNullException("packets");
}
if (comment == null)
{
throw new ArgumentNullException("comment");
}
ByteVector data = new ByteVector((byte)0x03);
data.Add(id);
data.Add(comment.Render(true));
if (packets.Count > 1 && PacketType(packets [1]) == 0x03)
{
if (data.Count < packets [1].Count)
{
data.Add(new ByteVector(packets [1].Count - data.Count, 0));
}
packets [1] = data;
}
else
{
packets.Insert(1, data);
}
}
/// <summary>
/// Replaces the comment packet in a collection of packets
/// with the rendered version of a Xiph comment or inserts a
/// comment packet if the stream lacks one.
/// </summary>
/// <param name="packets">
/// A <see cref="ByteVectorCollection" /> object containing
/// a collection of packets.
/// </param>
/// <param name="comment">
/// A <see cref="XiphComment" /> object to store the rendered
/// version of in <paramref name="packets" />.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="packets" /> or <paramref name="comment"
/// /> is <see langword="null" />.
/// </exception>
public override void SetCommentPacket(ByteVectorCollection packets,
XiphComment comment)
{
if (packets == null)
{
throw new ArgumentNullException("packets");
}
if (comment == null)
{
throw new ArgumentNullException("comment");
}
ByteVector data = new ByteVector();
data.Add(magic_signature_comment);
data.Add(comment.Render(true));
if (packets.Count > 1 && MagicSignature(packets [1])
== magic_signature_comment)
{
packets [1] = data;
}
else
{
packets.Insert(1, data);
}
}
public Page(ByteVectorCollection packets, PageHeader header) : this(header)
{
if (packets == null)
{
throw new ArgumentNullException("packets");
}
this.packets = new ByteVectorCollection(packets);
List<int> list = new List<int>();
IEnumerator<ByteVector> enumerator = packets.GetEnumerator();
try
{
while (enumerator.MoveNext())
{
ByteVector current = enumerator.Current;
list.Add(current.Count);
}
}
finally
{
if (enumerator == null)
{
}
enumerator.Dispose();
}
header.PacketSizes = list.ToArray();
}
/// <summary>
/// Gets the number of lacing value bytes that would be
/// required for a given packet.
/// </summary>
/// <param name="packets">
/// A <see cref="ByteVectorCollection" /> object containing
/// the packet.
/// </param>
/// <param name="index">
/// A <see cref="int" /> value containing the index of the
/// packet to compute.
/// </param>
/// <returns>
/// A <see cref="int" /> value containing the number of bytes
/// needed to store the length.
/// </returns>
static int GetLacingValueLength(ByteVectorCollection packets, int index)
{
int size = packets[index].Count;
return(size / 0xff + ((index + 1 < packets.Count ||
size % 0xff > 0) ? 1 : 0));
}
public void Insert()
{
ByteVectorCollection list = BuildList();
list.Insert(1, "QUACK");
Assert.AreEqual("ABC,QUACK,DEF,GHI", list.ToByteVector(",").ToString());
}
private static ByteVectorCollection BuildList()
{
ByteVectorCollection list = new ByteVectorCollection();
list.Add("ABC");
list.Add("DEF");
list.Add("GHI");
return list;
}
public void Contains()
{
ByteVectorCollection list = BuildList();
Assert.IsTrue(list.Contains("DEF"));
Assert.IsFalse(list.Contains("CDEFG"));
Assert.AreEqual(2, list.ToByteVector("").Find("CDEFG"));
}
private static ByteVectorCollection BuildList()
{
ByteVectorCollection list = new ByteVectorCollection();
list.Add("ABC");
list.Add("DEF");
list.Add("GHI");
return(list);
}
static ByteVectorCollection BuildList()
{
var list = new ByteVectorCollection {
"ABC",
"DEF",
"GHI"
};
return(list);
}
protected override void ParseFields(ByteVector data, byte version)
{
ByteVectorCollection fields = ByteVectorCollection.Split(data, (byte)0);
if (fields.Count != 2)
{
return;
}
owner = fields[0].ToString(StringType.Latin1);
identifier = fields[1];
}
public void SetText(ByteVector type, string text)
{
if (string.IsNullOrEmpty(text))
{
ilst_box.RemoveChild(FixId(type));
return;
}
ByteVectorCollection l = new ByteVectorCollection();
l.Add(ByteVector.FromString(text, StringType.UTF8));
SetData(type, l, (uint)AppleDataBox.FlagType.ContainsText);
}
public void SetValue(ByteVector id, ByteVectorCollection value)
{
if (id == null)
{
throw new ArgumentNullException("id");
}
if (id.Count != 4)
{
throw new ArgumentException("ID must be 4 bytes long.", "id");
}
fields.SetValue(id, value);
}
public void SetData(ByteVector type, ByteVectorCollection data, uint flags)
{
if (data == null || data.Count == 0)
{
ClearData(type);
return;
}
AppleDataBox[] boxes = new AppleDataBox[data.Count];
for (int i = 0; i < data.Count; i++)
{
boxes[i] = new AppleDataBox(data[i], flags);
}
SetData(type, boxes);
}
/// <summary>
/// Populates the values in the current instance by parsing
/// its field data in a specified version.
/// </summary>
/// <param name="data">
/// A <see cref="ByteVector" /> object containing the
/// extracted field data.
/// </param>
/// <param name="version">
/// A <see cref="byte" /> indicating the ID3v2 version the
/// field data is encoded in.
/// </param>
protected override void ParseFields(ByteVector data, byte version)
{
if (data.Count < 1)
{
throw new CorruptFileException("A private frame must contain at least 1 byte.");
}
var l = ByteVectorCollection.Split(data, ByteVector.TextDelimiter(StringType.Latin1), 1, 2);
if (l.Count == 2)
{
Owner = l[0].ToString(StringType.Latin1);
PrivateData = l[1];
}
}
public Page(ByteVectorCollection packets, PageHeader header) :
this(header)
{
if (packets == null)
{
throw new ArgumentNullException("packets");
}
this.packets = new ByteVectorCollection(packets);
List <int> packet_sizes = new List <int>();
foreach (ByteVector v in packets)
{
packet_sizes.Add(v.Count);
}
header.PacketSizes = packet_sizes.ToArray();
}
public Page (ByteVectorCollection packets, PageHeader header) : this (header)
{
if (packets == null)
throw new ArgumentNullException ("packets");
this.packets = packets;
List<int> packet_sizes = new List<int> ();
// Build a page from the list of packets.
foreach (ByteVector v in packets)
packet_sizes.Add (v.Count);
header.PacketSizes = packet_sizes.ToArray ();
}
public override void SetCommentPacket (ByteVectorCollection packets, XiphComment comment)
{
if (packets == null)
throw new ArgumentNullException ("packets");
if (comment == null)
throw new ArgumentNullException ("comment");
ByteVector data = new ByteVector ((byte) 0x03);
data.Add (id);
data.Add (comment.Render (true));
if (packets.Count > 1 && PacketType (packets [1]) == 0x03)
packets [1] = data;
else
packets.Insert (1, data);
}
//////////////////////////////////////////////////////////////////////////
// public methods
//////////////////////////////////////////////////////////////////////////
public OggPage(OggFile file, long pageOffset)
{
this.file = file;
this.fileOffset = pageOffset;
//packetOffset = 0;
//dataSize = 0;
header = new OggPageHeader(file, pageOffset);
firstPacketIndex = -1;
packets = new ByteVectorCollection();
if (file != null)
{
packetOffset = fileOffset + header.Size;
dataSize = header.DataSize;
}
}
/// <summary>
/// Constructs and initializes a new instance of
/// <see
/// cref="Page" />
/// with a specified header and packets.
/// </summary>
/// <param name="packets">
/// A <see cref="ByteVectorCollection" /> object containing
/// packets to use for the new instance.
/// </param>
/// <param name="header">
/// A <see cref="PageHeader" /> object to use as the header of
/// the new instance.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="packets" /> is <see langword="null" />.
/// </exception>
public Page(ByteVectorCollection packets, PageHeader header)
: this(header)
{
if (packets == null)
{
throw new ArgumentNullException(nameof(packets));
}
this.packets = new ByteVectorCollection(packets);
var packet_sizes = new List <int>();
// Build a page from the list of packets.
foreach (var v in packets)
{
packet_sizes.Add(v.Count);
}
header.PacketSizes = packet_sizes.ToArray();
}
/// <summary>
/// Sets the text for a specified box type.
/// </summary>
/// <param name="type">
/// A <see cref="ByteVector" /> object containing the type to
/// add to the new instance.
/// </param>
/// <param name="text">
/// A <see cref="string[]" /> containing text to store.
/// </param>
public void SetText(ByteVector type, string [] text)
{
// Remove empty data and return.
if (text == null)
{
ilst_box.RemoveChild(FixId(type));
return;
}
// Create a list...
ByteVectorCollection l = new ByteVectorCollection();
// and populate it with the ByteVectorized strings.
foreach (string value in text)
{
l.Add(ByteVector.FromString(value,
StringType.UTF8));
}
// Send our final byte vectors to SetData
SetData(type, l, (uint)
AppleDataBox.FlagType.ContainsText);
}
public override void SetCommentPacket(ByteVectorCollection packets, XiphComment comment)
{
if (packets == null)
{
throw new ArgumentNullException("packets");
}
if (comment == null)
{
throw new ArgumentNullException("comment");
}
byte[] data = new byte[] { 0x81 };
ByteVector item = new ByteVector(data) {
id,
comment.Render(1)
};
if ((packets.Count > 1) && (PacketType(packets[1]) == 0x81))
{
packets[1] = item;
}
else
{
packets.Insert(1, item);
}
}
/// <summary>
/// Repaginates the pages passed into the current instance to
/// handle changes made to the Xiph comment.
/// </summary>
/// <param name="change">
/// A <see cref="int" /> value reference containing the
/// the difference between the number of pages returned and
/// the number of pages that were added to the class.
/// </param>
/// <returns>
/// A <see cref="T:Page[]" /> containing the new page
/// collection.
/// </returns>
public Page [] Paginate(out int change)
{
// Ogg Pagination: Welcome to sucksville!
// If you don't understand this, you're not alone.
// It is confusing as Hell.
// TODO: Document this method, in the mean time, there
// is always http://xiph.org/ogg/doc/framing.html
if (pages_read == 0)
{
change = 0;
return(new Page [0]);
}
int count = pages_read;
ByteVectorCollection packets = new ByteVectorCollection(
this.packets);
PageHeader first_header = (PageHeader)first_page_header;
List <Page> pages = new List <Page> ();
uint index = 0;
bool bos = first_header.PageSequenceNumber == 0;
if (bos)
{
pages.Add(new Page(new ByteVectorCollection(packets [0]), first_header));
index++;
packets.RemoveAt(0);
count--;
}
int lacing_per_page = 0xfc;
if (count > 0)
{
int total_lacing_bytes = 0;
for (int i = 0; i < packets.Count; i++)
{
total_lacing_bytes += GetLacingValueLength(
packets, i);
}
lacing_per_page = Math.Min(total_lacing_bytes / count + 1, lacing_per_page);
}
int lacing_bytes_used = 0;
ByteVectorCollection page_packets = new ByteVectorCollection();
bool first_packet_continued = false;
while (packets.Count > 0)
{
int packet_bytes = GetLacingValueLength(packets, 0);
int remaining = lacing_per_page - lacing_bytes_used;
bool whole_packet = packet_bytes <= remaining;
if (whole_packet)
{
page_packets.Add(packets [0]);
lacing_bytes_used += packet_bytes;
packets.RemoveAt(0);
}
else
{
page_packets.Add(packets [0].Mid(0, remaining * 0xff));
packets [0] = packets [0].Mid(remaining * 0xff);
lacing_bytes_used += remaining;
}
if (lacing_bytes_used == lacing_per_page)
{
pages.Add(new Page(page_packets,
new PageHeader(first_header,
index, first_packet_continued ?
PageFlags.FirstPacketContinued :
PageFlags.None)));
page_packets = new ByteVectorCollection();
lacing_bytes_used = 0;
index++;
count--;
first_packet_continued = !whole_packet;
}
}
if (page_packets.Count > 0)
{
pages.Add(new Page(page_packets,
new PageHeader(
first_header.StreamSerialNumber,
index, first_packet_continued ?
PageFlags.FirstPacketContinued :
PageFlags.None)));
index++;
count--;
}
change = -count;
return(pages.ToArray());
}
private static int GetLacingValueLength(ByteVectorCollection packets, int index)
{
int count = packets[index].Count;
return ((count / 0xff) + ((((index + 1) >= packets.Count) && ((count % 0xff) <= 0)) ? 0 : 1));
}
protected Page (PageHeader header)
{
this.header = header;
packets = new ByteVectorCollection ();
}
public Page[] Paginate(out int change)
{
if (this.pages_read == 0)
{
change = 0;
return new Page[0];
}
int num = this.pages_read;
ByteVectorCollection packets = new ByteVectorCollection(this.packets);
PageHeader header = this.first_page_header.Value;
List<Page> list = new List<Page>();
uint offset = 0;
if (header.PageSequenceNumber == 0)
{
ByteVector[] vectorArray1 = new ByteVector[] { packets[0] };
list.Add(new Page(new ByteVectorCollection(vectorArray1), header));
offset++;
packets.RemoveAt(0);
num--;
}
int num3 = 0xfc;
if (num > 0)
{
int num4 = 0;
for (int i = 0; i < packets.Count; i++)
{
num4 += GetLacingValueLength(packets, i);
}
num3 = Math.Min((num4 / num) + 1, num3);
}
int num6 = 0;
ByteVectorCollection vectors2 = new ByteVectorCollection();
bool flag2 = false;
while (packets.Count > 0)
{
int lacingValueLength = GetLacingValueLength(packets, 0);
int num8 = num3 - num6;
bool flag3 = lacingValueLength <= num8;
if (flag3)
{
vectors2.Add(packets[0]);
num6 += lacingValueLength;
packets.RemoveAt(0);
}
else
{
vectors2.Add(packets[0].Mid(0, num8 * 0xff));
packets[0] = packets[0].Mid(num8 * 0xff);
num6 += num8;
}
if (num6 == num3)
{
list.Add(new Page(vectors2, new PageHeader(header, offset, !flag2 ? PageFlags.None : PageFlags.FirstPacketContinued)));
vectors2 = new ByteVectorCollection();
num6 = 0;
offset++;
num--;
flag2 = !flag3;
}
}
if (vectors2.Count > 0)
{
list.Add(new Page(vectors2, new PageHeader(header.StreamSerialNumber, offset, !flag2 ? PageFlags.None : PageFlags.FirstPacketContinued)));
offset++;
num--;
}
change = -num;
return list.ToArray();
}
/// <summary>
/// Replaces the comment packet in a collection of packets
/// with the rendered version of a Xiph comment or inserts a
/// comment packet if the stream lacks one.
/// </summary>
/// <param name="packets">
/// A <see cref="ByteVectorCollection" /> object containing
/// a collection of packets.
/// </param>
/// <param name="comment">
/// A <see cref="XiphComment" /> object to store the rendered
/// version of in <paramref name="packets" />.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="packets" /> or <paramref name="comment"
/// /> is <see langword="null" />.
/// </exception>
public override void SetCommentPacket (ByteVectorCollection packets,
XiphComment comment)
{
if (packets == null)
throw new ArgumentNullException ("packets");
if (comment == null)
throw new ArgumentNullException ("comment");
ByteVector data = new ByteVector ();
data.Add (magic_signature_comment);
data.Add (comment.Render (true));
if (packets.Count > 1 && MagicSignature (packets [1])
== magic_signature_comment)
packets [1] = data;
else
packets.Insert (1, data);
}
public void SetValue(ByteVector id, ByteVectorCollection value)
{
fields.SetValue(id, value);
}
/// <summary>
/// Gets the number of lacing value bytes that would be
/// required for a given packet.
/// </summary>
/// <param name="packets">
/// A <see cref="ByteVectorCollection" /> object containing
/// the packet.
/// </param>
/// <param name="index">
/// A <see cref="int" /> value containing the index of the
/// packet to compute.
/// </param>
/// <returns>
/// A <see cref="int" /> value containing the number of bytes
/// needed to store the length.
/// </returns>
private static int GetLacingValueLength(ByteVectorCollection packets,
int index)
{
int size = packets[index].Count;
return size / 0xff + ((index + 1 < packets.Count ||
size % 0xff > 0) ? 1 : 0);
}
/// <summary> /// Replaces the comment packet in a collection of packets /// with the rendered version of a Xiph comment or inserts a /// comment packet if the stream lacks one. /// </summary> /// <param name="packets"> /// A <see cref="ByteVectorCollection" /> object containing /// a collection of packets. /// </param> /// <param name="comment"> /// A <see cref="XiphComment" /> object to store the rendered /// version of in <paramref name="packets" />. /// </param> /// <exception cref="ArgumentNullException"> /// <paramref name="packets" /> or <paramref name="comment" /// /> is <see langword="null" />. /// </exception> public abstract void SetCommentPacket (ByteVectorCollection packets, XiphComment comment);
public Page[] Paginate(out int change)
{
if (pages_read == 0)
{
change = 0;
return(new Page[0]);
}
int count = pages_read;
ByteVectorCollection packets = new ByteVectorCollection(this.packets);
PageHeader first_header = (PageHeader)first_page_header;
List <Page> pages = new List <Page>();
uint index = 0;
bool bos = first_header.PageSequenceNumber == 0;
if (bos)
{
pages.Add(new Page(new ByteVectorCollection(packets[0]), first_header));
index++;
packets.RemoveAt(0);
count--;
}
int lacing_per_page = 0xfc;
if (count > 0)
{
int total_lacing_bytes = 0;
for (int i = 0; i < packets.Count; i++)
{
total_lacing_bytes += GetLacingValueLength(packets, i);
}
lacing_per_page = Math.Min(total_lacing_bytes / count + 1, lacing_per_page);
}
int lacing_bytes_used = 0;
ByteVectorCollection page_packets = new ByteVectorCollection();
bool first_packet_continued = false;
while (packets.Count > 0)
{
int packet_bytes = GetLacingValueLength(packets, 0);
int remaining = lacing_per_page - lacing_bytes_used;
bool whole_packet = packet_bytes <= remaining;
if (whole_packet)
{
page_packets.Add(packets[0]);
lacing_bytes_used += packet_bytes;
packets.RemoveAt(0);
}
else
{
page_packets.Add(packets[0].Mid(0, remaining * 0xff));
packets[0] = packets[0].Mid(remaining * 0xff);
lacing_bytes_used += remaining;
}
if (lacing_bytes_used == lacing_per_page)
{
pages.Add(new Page(page_packets, new PageHeader(first_header, index, first_packet_continued?PageFlags.FirstPacketContinued:PageFlags.None)));
page_packets = new ByteVectorCollection();
lacing_bytes_used = 0;
index++;
count--;
first_packet_continued = !whole_packet;
}
}
if (page_packets.Count > 0)
{
pages.Add(new Page(page_packets, new PageHeader(first_header.StreamSerialNumber, index, first_packet_continued?PageFlags.FirstPacketContinued:PageFlags.None)));
index++;
count--;
}
change = -count;
return(pages.ToArray());
}
public void SetValue(ByteVector id, ByteVectorCollection value)
{
if (id == null)
{
throw new ArgumentNullException("id");
}
if (id.Count != 4)
{
throw new ArgumentException("ID must be 4 bytes long.", "id");
}
this.fields.SetValue(id, value);
}
public static OggPage[] Paginate(ByteVectorCollection packets, PaginationStrategy strategy, uint streamSerialNumber,
int firstPage, bool firstPacketContinued, bool lastPacketCompleted, bool containsLastPacket)
{
ArrayList l = new ArrayList();
int totalSize = 0;
foreach (ByteVector b in packets)
totalSize += b.Count;
if (strategy == PaginationStrategy.Repaginate || totalSize + packets.Count > 255 * 256)
{
TagLibDebugger.Debug ("Ogg.Page.Paginate() -- Sorry! Repagination is not yet implemented.");
return (OggPage[]) l.ToArray(typeof(OggPage));
}
// TODO: Handle creation of multiple pages here with appropriate pagination.
OggPage p = new OggPage(packets, streamSerialNumber, firstPage, firstPacketContinued,
lastPacketCompleted, containsLastPacket);
l.Add (p);
return (OggPage[]) l.ToArray(typeof(OggPage));
}
protected OggPage (ByteVectorCollection packets, uint stream_serial_number,
int page_number)
: this (packets, stream_serial_number, page_number, false)
{
}
protected OggPage (ByteVectorCollection packets, uint stream_serial_number,
int page_number, bool first_packet_continued)
: this (packets, stream_serial_number, page_number,
first_packet_continued, true)
{
}
protected OggPage (ByteVectorCollection packets, uint stream_serial_number,
int page_number, bool first_packet_continued,
bool last_packet_completed, bool contains_last_packet)
{
//file = null;
fileOffset = -1;
//packetOffset = 0;
//dataSize = 0;
header = new OggPageHeader();
firstPacketIndex = -1;
this.packets = packets;
ByteVector data = new ByteVector();
ArrayList packet_sizes = new ArrayList();
header.FirstPageOfStream = (page_number == 0 && !first_packet_continued);
header.LastPageOfStream = contains_last_packet;
header.FirstPacketContinued = first_packet_continued;
header.LastPacketCompleted = last_packet_completed;
header.StreamSerialNumber = stream_serial_number;
header.PageSequenceNumber = page_number;
// Build a page from the text of packets.
foreach (ByteVector v in packets)
{
packet_sizes.Add (v.Count);
data.Add (v);
}
header.SetPacketSizes((int[]) packet_sizes.ToArray(typeof(int)));
}
public void SetValue (ByteVector id, ByteVectorCollection value)
{
fields.SetValue (id, value);
}
/// <summary>
/// Repaginates the pages passed into the current instance to
/// handle changes made to the Xiph comment.
/// </summary>
/// <param name="change">
/// A <see cref="int" /> value reference containing the
/// the difference between the number of pages returned and
/// the number of pages that were added to the class.
/// </param>
/// <returns>
/// A <see cref="Page[]" /> containing the new page
/// collection.
/// </returns>
public Page[] Paginate(out int change)
{
// Ogg Pagination: Welcome to sucksville!
// If you don't understand this, you're not alone.
// It is confusing as Hell.
// TODO: Document this method, in the mean time, there
// is always http://xiph.org/ogg/doc/framing.html
if (pages_read == 0)
{
change = 0;
return new Page[0];
}
int count = pages_read;
ByteVectorCollection packets = new ByteVectorCollection(
this.packets);
PageHeader first_header = (PageHeader)first_page_header;
List<Page> pages = new List<Page>();
uint index = 0;
bool bos = first_header.PageSequenceNumber == 0;
if (bos)
{
pages.Add(new Page(new ByteVectorCollection(packets[0]), first_header));
index++;
packets.RemoveAt(0);
count--;
}
int lacing_per_page = 0xfc;
if (count > 0)
{
int total_lacing_bytes = 0;
for (int i = 0; i < packets.Count; i++)
total_lacing_bytes += GetLacingValueLength(
packets, i);
lacing_per_page = Math.Min(total_lacing_bytes / count + 1, lacing_per_page);
}
int lacing_bytes_used = 0;
ByteVectorCollection page_packets = new ByteVectorCollection();
bool first_packet_continued = false;
while (packets.Count > 0)
{
int packet_bytes = GetLacingValueLength(packets, 0);
int remaining = lacing_per_page - lacing_bytes_used;
bool whole_packet = packet_bytes <= remaining;
if (whole_packet)
{
page_packets.Add(packets[0]);
lacing_bytes_used += packet_bytes;
packets.RemoveAt(0);
}
else
{
page_packets.Add(packets[0].Mid(0, remaining * 0xff));
packets[0] = packets[0].Mid(remaining * 0xff);
lacing_bytes_used += remaining;
}
if (lacing_bytes_used == lacing_per_page)
{
pages.Add(new Page(page_packets,
new PageHeader(first_header,
index, first_packet_continued ?
PageFlags.FirstPacketContinued :
PageFlags.None)));
page_packets = new ByteVectorCollection();
lacing_bytes_used = 0;
index++;
count--;
first_packet_continued = !whole_packet;
}
}
if (page_packets.Count > 0)
{
pages.Add(new Page(page_packets,
new PageHeader(
first_header.StreamSerialNumber,
index, first_packet_continued ?
PageFlags.FirstPacketContinued :
PageFlags.None)));
index++;
count--;
}
change = -count;
return pages.ToArray();
}
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 ByteVector GetPacket(uint index)
{
// Check to see if we're called setPacket() for this packet since the last
// save:
if (dirtyPackets.ContainsKey(index))
return dirtyPackets[index];
// If we haven'type indexed the page where the packet we're interested in starts,
// begin reading pages until we have.
while (packetToPageMap.Count <= index)
if (!NextPage())
{
TagLibDebugger.Debug("Ogg.File.Packet() -- Could not find the requested packet.");
return null;
}
// Start reading at the first page that contains part (or all) of this packet.
// If the last read stopped at the packet that we're interested in, don'type
// reread its packet text. (This should make sequential packet reads fast.)
int pageIndex = ((IntCollection)packetToPageMap[(int)index])[0];
if (currentPacketPage != pages[pageIndex])
{
currentPacketPage = pages[pageIndex];
currentPackets = currentPacketPage.Packets;
}
// If the packet is completely contained in the first page that it'field in, then
// just return it now.
if ((currentPacketPage.ContainsPacket((int)index) & ContainsPacketSettings.CompletePacket) != 0)
return currentPackets[(int)(index - currentPacketPage.FirstPacketIndex)];
// If the packet is *not* completely contained in the first page that it'field a
// part of then that packet trails off the end of the page. Continue appending
// the pages' packet data until we hit a page that either does not end with the
// packet that we're fetching or where the last packet is complete.
ByteVector packet = currentPackets[currentPackets.Count - 1];
while ((currentPacketPage.ContainsPacket((int)index) & ContainsPacketSettings.EndsWithPacket) != 0
&& !currentPacketPage.Header.LastPacketCompleted)
{
pageIndex++;
if (pageIndex == pages.Count && !NextPage())
{
TagLibDebugger.Debug("Ogg.File.Packet() -- Could not find the requested packet.");
return null;
}
currentPacketPage = (OggPage)pages[pageIndex];
currentPackets = currentPacketPage.Packets;
packet.Add(currentPackets[0]);
}
return packet;
}
/// <summary>
/// Constructs and intializes a new instance of <see
/// cref="Page" /> with a specified header and no packets.
/// </summary>
/// <param name="header">
/// A <see cref="PageHeader"/> object to use as the header of
/// the new instance.
/// </param>
protected Page(PageHeader header)
{
this.header = header;
packets = new ByteVectorCollection();
}
public static OggPage[] Paginate(ByteVectorCollection packets, PaginationStrategy strategy, uint streamSerialNumber,
int firstPage, bool firstPacketContinued)
{
return Paginate(packets, strategy, streamSerialNumber, firstPage,
firstPacketContinued, true);
}
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;
}
public abstract void SetCommentPacket(ByteVectorCollection packets, XiphComment comment);
public static OggPage[] Paginate(ByteVectorCollection packets, PaginationStrategy strategy, uint streamSerialNumber,
int firstPage)
{
return Paginate(packets, strategy, streamSerialNumber, firstPage, false);
}
