/// <summary>
/// Initializes a new instance of the <see cref="PdfJsHuffmanTable"/> struct.
/// </summary>
/// <param name="memoryManager">The <see cref="MemoryManager"/> to use for buffer allocations.</param>
/// <param name="lengths">The code lengths</param>
/// <param name="values">The huffman values</param>
public PdfJsHuffmanTable(MemoryManager memoryManager, byte[] lengths, byte[] values)
{
// TODO: Replace FakeBuffer<T> usages with standard or array orfixed-sized arrays
this.lookahead = memoryManager.AllocateFake <short>(256);
this.valOffset = memoryManager.AllocateFake <short>(18);
this.maxcode = memoryManager.AllocateFake <long>(18);
using (IBuffer <short> huffsize = memoryManager.Allocate <short>(257))
using (IBuffer <short> huffcode = memoryManager.Allocate <short>(257))
{
GenerateSizeTable(lengths, huffsize.Span);
GenerateCodeTable(huffsize.Span, huffcode.Span);
GenerateDecoderTables(lengths, huffcode.Span, this.valOffset.Span, this.maxcode.Span);
GenerateLookaheadTables(lengths, values, this.lookahead.Span);
}
this.huffval = memoryManager.AllocateManagedByteBuffer(values.Length, true);
Buffer.BlockCopy(values, 0, this.huffval.Array, 0, values.Length);
this.MaxCode = this.maxcode.Array;
this.ValOffset = this.valOffset.Array;
this.HuffVal = this.huffval.Array;
this.Lookahead = this.lookahead.Array;
}
