Function WriteBand_Fmt26

AudioEncode/aencode.cpp:510–558

}

void WriteBand_Fmt26(Encoder &enc, int32_t colIndex, uint32_t formatId) {
  const float currBlockValue = static_cast<float>(enc.m_currBlockBitValue);
  const float halfCurrBlockValue = currBlockValue * 0.5f;
  const int32_t minValue = static_cast<int32_t>(ceilf(-32767.0f / currBlockValue));
  const int32_t maxValue = static_cast<int32_t>(floorf(32767.0f / currBlockValue));
  const float *pColumnData = &enc.m_levelSlots[enc.m_levels][colIndex];

  int32_t currSampleIdx = enc.m_samples_per_subband;
  while (currSampleIdx) {
    --currSampleIdx;

    int32_t val = (int32_t)floorf((*pColumnData + halfCurrBlockValue) / currBlockValue);
    if (minValue > val) {
      val = minValue;
    } else if (maxValue < val) {
      val = maxValue;
    }

    pColumnData += enc.m_numColumns;
    if (!val) {
      if (currSampleIdx) {
        int32_t testVal = (int32_t)floorf((*pColumnData + halfCurrBlockValue) / currBlockValue);
        if (!testVal) {
          enc.m_bits.WriteBits(0, 1);

          if (currSampleIdx == 0)
            return;

          --currSampleIdx;
          pColumnData += enc.m_numColumns;
          continue;
        }
      }

      enc.m_bits.WriteBits(1, 2);
      continue;
    }

    enc.m_bits.WriteBits(3, 2);

    if (val >= 0) {
      val += 3;
    } else {
      val += 4;
    }

    enc.m_bits.WriteBits(val, 3);
  }
}

void WriteBand_Fmt27(Encoder &enc, int32_t colIndex, uint32_t formatId) {
  const float currBlockValue = static_cast<float>(enc.m_currBlockBitValue);