| 208 | } |
| 209 | |
| 210 | void WriteBand_Fmt18(Encoder &enc, int32_t colIndex, uint32_t formatId) { |
| 211 | const float currBlockBitValue = static_cast<float>(enc.m_currBlockBitValue); |
| 212 | const float halfCurrBlockBitValue = enc.m_currBlockBitValue * 0.5f; |
| 213 | const int32_t minValue = (int32_t)ceilf(-32767.0f / currBlockBitValue); |
| 214 | const int32_t maxValue = (int32_t)floorf(32767.0f / currBlockBitValue); |
| 215 | |
| 216 | const float *pCurrSample = &enc.m_levelSlots[enc.m_levels][colIndex]; |
| 217 | int32_t currSampleIndex = enc.m_samples_per_subband; |
| 218 | while (currSampleIndex) { |
| 219 | --currSampleIndex; |
| 220 | int32_t val = (int32_t)floorf((*pCurrSample + halfCurrBlockBitValue) / currBlockBitValue); |
| 221 | if (minValue > val) { |
| 222 | val = minValue; |
| 223 | } else if (val > maxValue) { |
| 224 | val = maxValue; |
| 225 | } |
| 226 | |
| 227 | pCurrSample += enc.m_numColumns; |
| 228 | |
| 229 | if (!val) { |
| 230 | enc.m_bits.WriteBits(0, 1); |
| 231 | continue; |
| 232 | } |
| 233 | |
| 234 | enc.m_bits.WriteBits(1, 1); |
| 235 | enc.m_bits.WriteBits((val == 1) ? 1 : 0, 1); |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | void WriteBand_Fmt19(Encoder &enc, int32_t colIndex, uint32_t formatId) { |
| 240 | const float currBlockBitValue = static_cast<float>(enc.m_currBlockBitValue); |