| 645 | } |
| 646 | |
| 647 | int SetupEncoder(Encoder &enc, int someVal, float std_lo_filter[], float std_hi_filter[], int8_t levels, |
| 648 | int samples_per_subband) { |
| 649 | enc.m_someVal = someVal; |
| 650 | enc.m_lo_filter = std_lo_filter; |
| 651 | enc.m_hi_filter = std_hi_filter; |
| 652 | enc.m_levels = levels; |
| 653 | enc.m_numColumns = 1 << levels; |
| 654 | enc.m_samples_per_subband = samples_per_subband; |
| 655 | enc.m_samplesPerBlock = samples_per_subband * enc.m_numColumns; |
| 656 | |
| 657 | int adjustedSomeVal = (((someVal < -1) ? (someVal + 1) : (someVal)) + 1) >> 1; |
| 658 | enc.m_adjustedSamplesTimeNumColumns = adjustedSomeVal * (enc.m_numColumns - 1); |
| 659 | enc.m_levelSlots = reinterpret_cast<float **>(malloc(sizeof(float *) * (levels + 1))); |
| 660 | if (enc.m_levelSlots == NULL) |
| 661 | return 0; |
| 662 | |
| 663 | if (levels >= 0) { |
| 664 | for (int8_t i = 0; i <= levels; ++i) { |
| 665 | int extraSamples = 0; |
| 666 | if (i != levels) { |
| 667 | extraSamples = (someVal - 1) << i; |
| 668 | } |
| 669 | |
| 670 | float *blockData = reinterpret_cast<float *>(malloc((enc.m_samplesPerBlock + extraSamples) * sizeof(float))); |
| 671 | enc.m_levelSlots[i] = blockData; |
| 672 | if (blockData == NULL) |
| 673 | return 0; |
| 674 | |
| 675 | memset(blockData, 0, (enc.m_samplesPerBlock + extraSamples) * sizeof(float)); |
| 676 | enc.m_levelSlots[i] += extraSamples; |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | enc.m_pFormatIdPerColumn = reinterpret_cast<uint32_t *>(malloc(enc.m_numColumns * sizeof(uint32_t))); |
| 681 | if (enc.m_pFormatIdPerColumn == NULL) |
| 682 | return 0; |
| 683 | |
| 684 | enc.m_sampleCount = 0; |
| 685 | |
| 686 | int32_t edxOffset = |
| 687 | ((enc.m_samplesPerBlock * sizeof(float) * 25) - enc.m_adjustedSamplesTimeNumColumns) % enc.m_samplesPerBlock; |
| 688 | enc.m_pCurrBlockData = enc.m_levelSlots[0] + edxOffset; |
| 689 | enc.m_blockSamplesRemaining = enc.m_samplesPerBlock - edxOffset; |
| 690 | enc.m_bandWriteEnabled = 0; |
| 691 | enc.m_finishedReading = 0; |
| 692 | return 1; |
| 693 | } |
| 694 | |
| 695 | void DestroyEncoder(Encoder &enc) { |
| 696 | if (enc.m_levelSlots != NULL) { |