Method IntegerCompressor

src/integercompressor.cpp:47–107

#endif

IntegerCompressor::IntegerCompressor(ArithmeticEncoder* enc, U32 bits, U32 contexts, U32 bits_high, U32 range)
{
  assert(enc);
  this->enc = enc;
  this->dec = 0;
  this->bits = bits;
  this->contexts = contexts;
  this->bits_high = bits_high;
  this->range = range;

  if (range) // the corrector's significant bits and range
  {
    corr_bits = 0;
    corr_range = range;
    while (range)
    {
      range = range >> 1;
      corr_bits++;
    }
    if (corr_range == (1u << (corr_bits-1)))
    {
      corr_bits--;
    }
		// the corrector must fall into this interval
    corr_min = -((I32)(corr_range/2));
  	corr_max = corr_min + corr_range - 1;
  }
  else if (bits && bits < 32)
  {
    corr_bits = bits;
    corr_range = 1u << bits;
		// the corrector must fall into this interval
    corr_min = -((I32)(corr_range/2));
  	corr_max = corr_min + corr_range - 1;
  }
	else
	{
    corr_bits = 32;
		corr_range = 0;
		// the corrector must fall into this interval
    corr_min = I32_MIN;
    corr_max = I32_MAX;
	}

  k = 0;

  mBits = 0;
  mCorrector = 0;

#ifdef CREATE_HISTOGRAMS
  corr_histogram = (int**)malloc_las(sizeof(int*) * (corr_bits + 1));
  for (int k = 0; k <= corr_bits; k++)
  {
    corr_histogram[k] = (int*)malloc_las(sizeof(int) * ((1 << k) + 1));
    for (int c = 0; c <= (1<<k); c++)
    {
      corr_histogram[k][c] = 0;
    }