public ResidueTemplate(
ResidueType residueType,
ResidueLimitType limitType,
int grouping,
ResidueEntry residue,
IStaticCodeBook bookAux,
IStaticCodeBook booxAuxManaged,
IStaticBookBlock booksBase,
IStaticBookBlock booksBaseManaged)
{
ResidueType = residueType;
LimitType = limitType;
Residue = residue;
BookAux = bookAux;
BookAuxManaged = booxAuxManaged;
BooksBase = booksBase;
BooksBaseManaged = booksBaseManaged;
Grouping = grouping;
}
private static void FillBooks(
CodecSetup codecSetup,
ResidueEntry r,
IStaticCodeBook bookAux,
IStaticBookBlock bookBlock)
{
for (var i = 0; i < r.Partitions; i++)
{
for (var k = 0; k < 4; k++)
{
if ((i < bookBlock.Books.Length) &&
(k < bookBlock.Books[i].Length) &&
(bookBlock.Books[i][k] != null))
{
r.SecondStages[i] |= 1 << k;
}
}
}
r.GroupBook = GetOrAddBook(codecSetup, bookAux);
var booklist = 0;
for (var i = 0; i < r.Partitions; i++)
{
for (var k = 0; k < 4; k++)
{
if ((i < bookBlock.Books.Length) &&
(k < bookBlock.Books[i].Length))
{
var sourceBook = bookBlock.Books[i][k];
if (sourceBook != null)
{
var bookid = GetOrAddBook(codecSetup, sourceBook);
r.BookList[booklist++] = bookid;
}
}
}
}
}
public ResidueLookup(ResidueEntry residue, CodeBook[] fullBooks)
{
_residue = residue;
_phraseBook = fullBooks[residue.GroupBook];
var acc = 0;
var maxstage = 0;
_partitionBooks = new CodeBook[residue.Partitions][];
for (var j = 0; j < _partitionBooks.Length; j++)
{
var stages = Encoding.Log(residue.SecondStages[j]);
if (stages == 0)
{
continue;
}
if (stages > maxstage)
{
maxstage = stages;
}
_partitionBooks[j] = new CodeBook[stages];
for (var k = 0; k < stages; k++)
{
if ((residue.SecondStages[j] & (1 << k)) != 0)
{
_partitionBooks[j][k] = fullBooks[residue.BookList[acc++]];
}
}
}
_stages = maxstage;
}
private static void PackResidue(EncodeBuffer buffer, ResidueEntry residue)
{
buffer.Write((uint)residue.Begin, 24);
buffer.Write((uint)residue.End, 24);
buffer.Write((uint)(residue.Grouping - 1), 24);
// residue vectors to group and code with a partitioned book
buffer.Write((uint)(residue.Partitions - 1), 6); // possible partition choices
buffer.Write((uint)residue.GroupBook, 8); // group huffman book
var acc = 0;
// secondstages is a bitmask; as encoding progresses pass by pass, a
// bitmask of one indicates this partition class has bits to write this pass
for (var j = 0; j < residue.Partitions; j++)
{
if (Encoding.Log(residue.SecondStages[j]) > 3)
{
// yes, this is a minor hack due to not thinking ahead
buffer.Write((uint)residue.SecondStages[j], 3);
buffer.Write(1, 1);
buffer.Write((uint)residue.SecondStages[j] >> 3, 5);
}
else
{
buffer.Write((uint)residue.SecondStages[j], 4); // trailing zero
}
acc += Count(residue.SecondStages[j]);
}
for (var j = 0; j < acc; j++)
{
buffer.Write((uint)residue.BookList[j], 8);
}
}
