mirror of
https://github.com/crskycode/GARbro.git
synced 2024-11-24 06:05:35 +08:00
6a89368023
also reorganized Entis-related classes and enums. static math methods moved to separate static class.
969 lines
39 KiB
C#
969 lines
39 KiB
C#
// *****************************************************************************
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// E R I S A - L i b r a r y
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// -----------------------------------------------------------------------------
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// Copyright (C) 2002-2007 Leshade Entis, Entis-soft. All rights reserved.
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// *****************************************************************************
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//
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// C# port by morkt
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//
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using System;
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using System.Diagnostics;
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using GameRes.Utility;
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namespace GameRes.Formats.Entis
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{
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internal class MioInfoHeader
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{
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public int Version;
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public CvType Transformation;
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public EriCode Architecture;
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public int ChannelCount;
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public uint SamplesPerSec;
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public uint BlocksetCount;
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public int SubbandDegree;
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public uint AllSampleCount;
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public uint LappedDegree;
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public uint BitsPerSample;
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}
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internal class MioDataHeader
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{
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public byte Version;
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public byte Flags;
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public uint SampleCount;
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}
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internal struct EriSinCos
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{
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public float rSin;
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public float rCos;
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}
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internal class MioDecoder
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{
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MioInfoHeader m_mioih;
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uint m_nBufLength = 0;
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int[] m_ptrBuffer1;
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int[] m_ptrBuffer2;
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sbyte[] m_ptrBuffer3;
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byte[] m_ptrBuffer4;
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byte[] m_ptrDivisionTable;
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byte[] m_ptrRevolveCode;
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int[] m_ptrWeightCode;
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int[] m_ptrCoefficient;
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float[] m_ptrMatrixBuf;
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float[] m_ptrInternalBuf;
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float[] m_ptrWorkBuf;
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float[] m_ptrWeightTable;
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float[] m_ptrLastDCT;
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int m_ptrNextDivision;
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int m_ptrNextRevCode;
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int m_ptrNextWeight;
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int m_ptrNextCoefficient;
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int m_ptrNextSource;
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int m_ptrLastDCTBuf;
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int m_nSubbandDegree;
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int m_nDegreeNum;
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EriSinCos[] m_pRevolveParam;
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readonly int[] m_nFrequencyPoint = new int[7];
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public MioDecoder (MioInfoHeader info)
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{
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m_nBufLength = 0;
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m_mioih = info;
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if (!Initialize())
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throw new InvalidFormatException();
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}
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bool Initialize ()
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{
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if ((m_mioih.ChannelCount != 1) && (m_mioih.ChannelCount != 2))
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{
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return false;
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}
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if (m_mioih.Transformation == CvType.Lossless_ERI)
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{
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if (m_mioih.Architecture != EriCode.RunlengthHuffman)
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{
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return false;
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}
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if ((m_mioih.BitsPerSample != 8) && (m_mioih.BitsPerSample != 16))
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{
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return false;
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}
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}
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else if ((m_mioih.Transformation == CvType.LOT_ERI)
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|| (m_mioih.Transformation == CvType.LOT_ERI_MSS))
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{
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if ((m_mioih.Architecture != EriCode.RunlengthGamma)
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&& (m_mioih.Architecture != EriCode.RunlengthHuffman)
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&& (m_mioih.Architecture != EriCode.Nemesis))
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{
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return false;
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}
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if (m_mioih.BitsPerSample != 16)
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{
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return false;
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}
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if ((m_mioih.SubbandDegree < 8) || (m_mioih.SubbandDegree > Erisa.MAX_DCT_DEGREE))
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{
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return false;
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}
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if (m_mioih.LappedDegree != 1)
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{
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return false;
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}
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int subband = (sizeof(float) << m_mioih.SubbandDegree) / sizeof(float);
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int block_size = m_mioih.ChannelCount * subband;
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m_ptrBuffer1 = new int[block_size];
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m_ptrMatrixBuf = new float[block_size];
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m_ptrInternalBuf = new float[block_size];
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m_ptrWorkBuf = new float[subband];
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m_ptrWeightTable = new float[subband];
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uint nBlocksetSamples = (uint)(m_mioih.ChannelCount << m_mioih.SubbandDegree);
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uint nLappedSamples = nBlocksetSamples * m_mioih.LappedDegree;
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if (nLappedSamples > 0)
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{
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m_ptrLastDCT = new float[nLappedSamples];
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}
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InitializeWithDegree (m_mioih.SubbandDegree);
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}
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else
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{
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return false;
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}
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return true;
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}
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public bool DecodeSound (ERISADecodeContext context, MioDataHeader datahdr, byte[] ptrWaveBuf, int wave_pos)
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{
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context.FlushBuffer();
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if (m_mioih.Transformation == CvType.Lossless_ERI)
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{
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if (m_mioih.BitsPerSample == 8)
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{
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return DecodeSoundPCM8 (context, datahdr, ptrWaveBuf, wave_pos);
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}
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else if (m_mioih.BitsPerSample == 16)
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{
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return DecodeSoundPCM16 (context, datahdr, ptrWaveBuf, wave_pos);
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}
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}
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else if ((m_mioih.Transformation == CvType.LOT_ERI)
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|| (m_mioih.Transformation == CvType.LOT_ERI_MSS))
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{
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if ((m_mioih.ChannelCount != 2) || (m_mioih.Transformation == CvType.LOT_ERI))
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{
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return DecodeSoundDCT (context, datahdr, ptrWaveBuf, wave_pos);
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}
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else
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{
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return DecodeSoundDCT_MSS (context, datahdr, ptrWaveBuf, wave_pos);
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}
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}
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return false;
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}
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bool DecodeSoundPCM8 (ERISADecodeContext context, MioDataHeader datahdr, byte[] ptrWaveBuf, int wave_pos)
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{
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uint nSampleCount = datahdr.SampleCount;
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if (nSampleCount > m_nBufLength)
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{
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m_ptrBuffer3 = new sbyte [nSampleCount * m_mioih.ChannelCount];
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m_nBufLength = nSampleCount;
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}
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if (0 != (datahdr.Flags & MIO_LEAD_BLOCK))
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{
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(context as HuffmanDecodeContext).PrepareToDecodeERINACode();
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}
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uint nBytes = nSampleCount * (uint)m_mioih.ChannelCount;
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if (context.DecodeBytes (m_ptrBuffer3, nBytes) < nBytes)
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{
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return false;
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}
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int ptrSrcBuf = 0; // (PBYTE) m_ptrBuffer3;
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int nStep = m_mioih.ChannelCount;
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for (int i = 0; i < m_mioih.ChannelCount; i ++ )
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{
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int ptrDstBuf = wave_pos + i;
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sbyte bytValue = 0;
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for (uint j = 0; j < nSampleCount; j++)
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{
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bytValue += m_ptrBuffer3[ptrSrcBuf++];
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ptrWaveBuf[ptrDstBuf] = (byte)bytValue;
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ptrDstBuf += nStep;
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}
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}
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return true;
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}
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bool DecodeSoundPCM16 (ERISADecodeContext context, MioDataHeader datahdr, byte[] ptrWaveBuf, int wave_pos)
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{
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uint nSampleCount = datahdr.SampleCount;
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uint nChannelCount = (uint)m_mioih.ChannelCount;
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uint nAllSampleCount = nSampleCount * nChannelCount;
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uint nBytes = nAllSampleCount * sizeof(short);
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if (ptrWaveBuf.Length < wave_pos + (int)nBytes)
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return false;
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if (nSampleCount > m_nBufLength)
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{
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m_ptrBuffer3 = new sbyte[nBytes];
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m_ptrBuffer4 = new byte[nBytes];
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m_nBufLength = nSampleCount;
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}
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if (0 != (datahdr.Flags & MIO_LEAD_BLOCK))
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{
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(context as HuffmanDecodeContext).PrepareToDecodeERINACode();
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}
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if (context.DecodeBytes (m_ptrBuffer3, nBytes) < nBytes)
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{
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return false;
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}
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int pbytSrcBuf1, pbytSrcBuf2, pbytDstBuf;
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for (int i = 0; i < m_mioih.ChannelCount; i++)
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{
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int nOffset = i * (int)nSampleCount * sizeof(short);
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pbytSrcBuf1 = nOffset; // ((PBYTE) m_ptrBuffer3) + nOffset;
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pbytSrcBuf2 = pbytSrcBuf1 + (int)nSampleCount; // pbytSrcBuf1 + nSampleCount;
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pbytDstBuf = nOffset; // ((PBYTE) m_ptrBuffer4) + nOffset;
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for (uint j = 0; j < nSampleCount; j ++)
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{
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sbyte bytLow = m_ptrBuffer3[pbytSrcBuf2 + j];
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sbyte bytHigh = m_ptrBuffer3[pbytSrcBuf1 + j];
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m_ptrBuffer4[pbytDstBuf + j * sizeof(short) + 0] = (byte)bytLow;
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m_ptrBuffer4[pbytDstBuf + j * sizeof(short) + 1] = (byte)(bytHigh ^ (bytLow >> 7));
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}
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}
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if (m_ptrBuffer4.Length < nBytes)
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return false;
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unsafe
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{
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fixed (byte* rawBuffer4 = m_ptrBuffer4, rawWaveBuf = &ptrWaveBuf[wave_pos])
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{
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int nStep = m_mioih.ChannelCount;
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short* ptrSrcBuf = (short*)rawBuffer4;
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for (int i = 0; i < m_mioih.ChannelCount; i++)
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{
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short* ptrDstBuf = (short*)rawWaveBuf + i; // (SWORD*) ptrWaveBuf;
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short wValue = 0;
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short wDelta = 0;
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for (uint j = 0; j < nSampleCount; j++)
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{
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wDelta += *ptrSrcBuf++;
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wValue += wDelta;
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*ptrDstBuf = wValue;
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ptrDstBuf += nStep;
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}
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}
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}
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}
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return true;
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}
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static readonly int[] FreqWidth = new int[7] { -6, -6, -5, -4, -3, -2, -1 };
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void InitializeWithDegree (int nSubbandDegree)
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{
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m_pRevolveParam = Erisa.CreateRevolveParameter (nSubbandDegree);
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for (int i = 0, j = 0; i < 7; i ++)
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{
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int nFrequencyWidth = 1 << (nSubbandDegree + FreqWidth[i]);
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m_nFrequencyPoint[i] = j + (nFrequencyWidth / 2);
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j += nFrequencyWidth;
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}
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m_nSubbandDegree = nSubbandDegree;
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m_nDegreeNum = 1 << nSubbandDegree;
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}
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const uint MIO_LEAD_BLOCK = 0x01;
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bool DecodeSoundDCT (ERISADecodeContext context, MioDataHeader datahdr, byte[] ptrWaveBuf, int wave_pos)
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{
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uint i, j, k;
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uint nDegreeWidth = 1u << m_mioih.SubbandDegree;
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uint nSampleCount = (datahdr.SampleCount + nDegreeWidth - 1) & ~(nDegreeWidth - 1);
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uint nSubbandCount = (nSampleCount >> m_mioih.SubbandDegree);
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uint nChannelCount = (uint)m_mioih.ChannelCount;
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uint nAllSampleCount = nSampleCount * nChannelCount;
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uint nAllSubbandCount = nSubbandCount * nChannelCount;
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if (nSampleCount > m_nBufLength)
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{
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m_ptrBuffer2 = new int[nAllSampleCount];
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m_ptrBuffer3 = new sbyte[nAllSampleCount * sizeof(short)];
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m_ptrDivisionTable = new byte[nAllSubbandCount];
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m_ptrWeightCode = new int[nAllSubbandCount * 5];
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m_ptrCoefficient = new int[nAllSubbandCount * 5];
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m_nBufLength = nSampleCount;
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}
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if (context.GetABit() != 0)
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{
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return false;
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}
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int[] pLastDivision = new int [nChannelCount];
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m_ptrNextDivision = 0; // within m_ptrDivisionTable;
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m_ptrNextWeight = 0; // within m_ptrWeightCode;
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m_ptrNextCoefficient = 0; // within m_ptrCoefficient;
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for (i = 0; i < nChannelCount; i++)
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{
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pLastDivision[i] = -1;
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}
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for (i = 0; i < nSubbandCount; i++)
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{
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for (j = 0; j < nChannelCount; j++)
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{
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int nDivisionCode = (int)context.GetNBits(2);
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m_ptrDivisionTable[m_ptrNextDivision++] = (byte)nDivisionCode;
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if (nDivisionCode != pLastDivision[j])
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{
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if (i != 0)
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{
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m_ptrWeightCode[m_ptrNextWeight++] = (int)context.GetNBits (32);
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m_ptrCoefficient[m_ptrNextCoefficient++] = (int)context.GetNBits (16);
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}
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pLastDivision[j] = nDivisionCode;
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}
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uint nDivisionCount = 1u << nDivisionCode;
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for (k = 0; k < nDivisionCount; k ++)
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{
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m_ptrWeightCode[m_ptrNextWeight++] = (int)context.GetNBits (32);
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m_ptrCoefficient[m_ptrNextCoefficient++] = (int)context.GetNBits (16);
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}
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}
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}
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if (nSubbandCount > 0)
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{
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for (i = 0; i < nChannelCount; i++)
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{
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m_ptrWeightCode[m_ptrNextWeight++] = (int)context.GetNBits (32);
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m_ptrCoefficient[m_ptrNextCoefficient++] = (int)context.GetNBits (16);
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}
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}
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if (context.GetABit() != 0)
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{
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return false;
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}
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if (0 != (datahdr.Flags & MIO_LEAD_BLOCK))
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{
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if (m_mioih.Architecture != EriCode.Nemesis)
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{
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(context as HuffmanDecodeContext).PrepareToDecodeERINACode();
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}
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else
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{
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throw new NotImplementedException ("Nemesis encoding not implemented");
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// context.PrepareToDecodeERISACode();
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}
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}
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else if (m_mioih.Architecture == EriCode.Nemesis)
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{
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throw new NotImplementedException ("Nemesis encoding not implemented");
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// context.InitializeERISACode();
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}
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if (m_mioih.Architecture != EriCode.Nemesis)
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{
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if (context.DecodeBytes (m_ptrBuffer3, nAllSampleCount * 2 ) < nAllSampleCount * 2)
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{
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return false;
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}
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int ptrHBuf = 0; // within m_ptrBuffer3;
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int ptrLBuf = (int)nAllSampleCount; // within m_ptrBuffer3
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for (i = 0; i < nDegreeWidth; i++)
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{
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int ptrQuantumized = (int)i; // within (PINT) m_ptrBuffer2
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for (j = 0; j < nAllSubbandCount; j++)
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{
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int nLow = m_ptrBuffer3[ptrLBuf++];
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int nHigh = m_ptrBuffer3[ptrHBuf++] ^ (nLow >> 8);
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m_ptrBuffer2[ptrQuantumized] = (nLow & 0xFF) | (nHigh << 8);
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ptrQuantumized += (int)nDegreeWidth;
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}
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}
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}
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else
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{
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throw new NotImplementedException ("Nemesis encoding not implemented");
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/*
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if (context.DecodeERISACodeWords (m_ptrBuffer3, nAllSampleCount) < nAllSampleCount)
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{
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return false;
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}
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for (i = 0; i < nAllSampleCount; i++)
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{
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((PINT)m_ptrBuffer2)[i] = ((SWORD*)m_ptrBuffer3)[i];
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}
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*/
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}
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uint nSamples;
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uint[] pRestSamples = new uint [nChannelCount];
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int[] ptrDstBuf = new int [nChannelCount]; // indices within ptrWaveBuf
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m_ptrNextDivision = 0; // within m_ptrDivisionTable;
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m_ptrNextWeight = 0; // within m_ptrWeightCode;
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m_ptrNextCoefficient = 0; // within m_ptrCoefficient;
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m_ptrNextSource = 0; // within (PINT) m_ptrBuffer2;
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for (i = 0; i < nChannelCount; i++)
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{
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pLastDivision[i] = -1;
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pRestSamples[i] = datahdr.SampleCount;
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ptrDstBuf[i] = wave_pos + (int)i*sizeof(short);
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}
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int nCurrentDivision = -1;
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for (i = 0; i < nSubbandCount; i++)
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{
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for (j = 0; j < nChannelCount; j++)
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{
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int nDivisionCode = m_ptrDivisionTable[m_ptrNextDivision++];
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int nDivisionCount = 1 << nDivisionCode;
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int nChannelStep = (int)(nDegreeWidth * m_mioih.LappedDegree * j);
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m_ptrLastDCTBuf = nChannelStep; // within m_ptrLastDCT
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bool fLeadBlock = false;
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if (pLastDivision[j] != nDivisionCode)
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{
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if (i != 0)
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{
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if (nCurrentDivision != pLastDivision[j])
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{
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InitializeWithDegree (m_mioih.SubbandDegree - pLastDivision[j]);
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nCurrentDivision = pLastDivision[j];
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}
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nSamples = pRestSamples[j];
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if (nSamples > m_nDegreeNum)
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{
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nSamples = (uint)m_nDegreeNum;
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}
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DecodePostBlock (ptrWaveBuf, ptrDstBuf[j], nSamples);
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pRestSamples[j] -= nSamples;
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ptrDstBuf[j] += (int)(nSamples * nChannelCount * sizeof(short));
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}
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pLastDivision[j] = (int)nDivisionCode;
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fLeadBlock = true;
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}
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if (nCurrentDivision != nDivisionCode)
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{
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InitializeWithDegree (m_mioih.SubbandDegree - nDivisionCode);
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nCurrentDivision = nDivisionCode;
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}
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for (k = 0; k < nDivisionCount; k++)
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{
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if (fLeadBlock)
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{
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DecodeLeadBlock();
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fLeadBlock = false;
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}
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else
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{
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nSamples = pRestSamples[j];
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if (nSamples > m_nDegreeNum)
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{
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nSamples = (uint)m_nDegreeNum;
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}
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DecodeInternalBlock (ptrWaveBuf, ptrDstBuf[j], nSamples);
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pRestSamples[j] -= nSamples;
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ptrDstBuf[j] += (int)(nSamples * nChannelCount * sizeof(short));
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}
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}
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}
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}
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if (nSubbandCount > 0)
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{
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for (i = 0; i < nChannelCount; i ++)
|
|
{
|
|
int nChannelStep = (int)(nDegreeWidth * m_mioih.LappedDegree * i);
|
|
m_ptrLastDCTBuf = nChannelStep; // within m_ptrLastDCT
|
|
|
|
if (nCurrentDivision != pLastDivision[i])
|
|
{
|
|
InitializeWithDegree (m_mioih.SubbandDegree - pLastDivision[i]);
|
|
nCurrentDivision = pLastDivision[i];
|
|
}
|
|
nSamples = pRestSamples[i];
|
|
if (nSamples > m_nDegreeNum)
|
|
{
|
|
nSamples = (uint)m_nDegreeNum;
|
|
}
|
|
DecodePostBlock (ptrWaveBuf, ptrDstBuf[i], nSamples);
|
|
pRestSamples[i] -= nSamples;
|
|
ptrDstBuf[i] += (int)(nSamples * nChannelCount * sizeof(short));
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void DecodeInternalBlock (byte[] ptrDst, int iDst, uint nSamples)
|
|
{
|
|
int nWeightCode = m_ptrWeightCode[m_ptrNextWeight++];
|
|
int nCoefficient = m_ptrCoefficient[m_ptrNextCoefficient++];
|
|
IQuantumize (m_ptrMatrixBuf, 0, m_ptrBuffer2, m_ptrNextSource, m_nDegreeNum, nWeightCode, nCoefficient);
|
|
m_ptrNextSource += (int)m_nDegreeNum;
|
|
|
|
Erisa.OddGivensInverseMatrix (m_ptrMatrixBuf, 0, m_pRevolveParam, m_nSubbandDegree);
|
|
Erisa.FastIPLOT (m_ptrMatrixBuf, 0, m_nSubbandDegree);
|
|
Erisa.FastILOT (m_ptrWorkBuf, m_ptrLastDCT, m_ptrLastDCTBuf, m_ptrMatrixBuf, 0, m_nSubbandDegree);
|
|
|
|
Array.Copy (m_ptrMatrixBuf, 0, m_ptrLastDCT, m_ptrLastDCTBuf, m_nDegreeNum);
|
|
Array.Copy (m_ptrWorkBuf, 0, m_ptrMatrixBuf, 0, m_nDegreeNum);
|
|
|
|
Erisa.FastIDCT (m_ptrInternalBuf, m_ptrMatrixBuf, 0, 1, m_ptrWorkBuf, m_nSubbandDegree);
|
|
if (nSamples != 0)
|
|
{
|
|
Erisa.RoundR32ToWordArray (ptrDst, iDst, m_mioih.ChannelCount, m_ptrInternalBuf, (int)nSamples);
|
|
}
|
|
}
|
|
|
|
void DecodeLeadBlock ()
|
|
{
|
|
int nWeightCode = m_ptrWeightCode[m_ptrNextWeight++];
|
|
int nCoefficient = m_ptrCoefficient[m_ptrNextCoefficient++];
|
|
uint i;
|
|
uint nHalfDegree = (uint)m_nDegreeNum / 2;
|
|
for (i = 0; i < nHalfDegree; i++)
|
|
{
|
|
m_ptrBuffer1[i * 2] = 0;
|
|
m_ptrBuffer1[i * 2 + 1] = m_ptrBuffer2[m_ptrNextSource++];
|
|
}
|
|
IQuantumize (m_ptrLastDCT, m_ptrLastDCTBuf, m_ptrBuffer1, 0, m_nDegreeNum, nWeightCode, nCoefficient);
|
|
Erisa.OddGivensInverseMatrix (m_ptrLastDCT, m_ptrLastDCTBuf, m_pRevolveParam, m_nSubbandDegree);
|
|
for (i = 0; i < m_nDegreeNum; i += 2)
|
|
{
|
|
m_ptrLastDCT[m_ptrLastDCTBuf + i] = m_ptrLastDCT[m_ptrLastDCTBuf + i + 1];
|
|
}
|
|
Erisa.FastIPLOT (m_ptrLastDCT, m_ptrLastDCTBuf, m_nSubbandDegree);
|
|
}
|
|
|
|
void DecodePostBlock (byte[] ptrDst, int iDst, uint nSamples)
|
|
{
|
|
int nWeightCode = m_ptrWeightCode[m_ptrNextWeight++];
|
|
int nCoefficient = m_ptrCoefficient[m_ptrNextCoefficient++];
|
|
uint i;
|
|
uint nHalfDegree = (uint)m_nDegreeNum / 2;
|
|
for (i = 0; i < nHalfDegree; i++)
|
|
{
|
|
m_ptrBuffer1[i * 2] = 0;
|
|
m_ptrBuffer1[i * 2 + 1] = m_ptrBuffer2[m_ptrNextSource++];
|
|
}
|
|
IQuantumize (m_ptrMatrixBuf, 0, m_ptrBuffer1, 0, m_nDegreeNum, nWeightCode, nCoefficient);
|
|
Erisa.OddGivensInverseMatrix (m_ptrMatrixBuf, 0, m_pRevolveParam, m_nSubbandDegree);
|
|
|
|
for (i = 0; i < m_nDegreeNum; i += 2)
|
|
{
|
|
m_ptrMatrixBuf[i] = - m_ptrMatrixBuf[i + 1];
|
|
}
|
|
|
|
Erisa.FastIPLOT (m_ptrMatrixBuf, 0, m_nSubbandDegree);
|
|
Erisa.FastILOT (m_ptrWorkBuf, m_ptrLastDCT, m_ptrLastDCTBuf, m_ptrMatrixBuf, 0, m_nSubbandDegree);
|
|
|
|
Array.Copy (m_ptrWorkBuf, 0, m_ptrMatrixBuf, 0, m_nDegreeNum);
|
|
|
|
Erisa.FastIDCT (m_ptrInternalBuf, m_ptrMatrixBuf, 0, 1, m_ptrWorkBuf, m_nSubbandDegree);
|
|
if (nSamples != 0)
|
|
{
|
|
Erisa.RoundR32ToWordArray (ptrDst, iDst, m_mioih.ChannelCount, m_ptrInternalBuf, (int)nSamples);
|
|
}
|
|
}
|
|
|
|
bool DecodeSoundDCT_MSS (ERISADecodeContext context, MioDataHeader datahdr, byte[] ptrWaveBuf, int wave_pos)
|
|
{
|
|
uint nDegreeWidth = 1u << m_mioih.SubbandDegree;
|
|
uint nSampleCount = (datahdr.SampleCount + nDegreeWidth - 1) & ~(nDegreeWidth - 1);
|
|
uint nSubbandCount = (nSampleCount >> m_mioih.SubbandDegree);
|
|
uint nChannelCount = (uint)m_mioih.ChannelCount;
|
|
uint nAllSampleCount = nSampleCount * nChannelCount;
|
|
uint nAllSubbandCount = nSubbandCount;
|
|
|
|
if (nSampleCount > m_nBufLength)
|
|
{
|
|
m_ptrBuffer2 = new int[nAllSampleCount];
|
|
m_ptrBuffer3 = new sbyte[nAllSampleCount * sizeof(short)];
|
|
m_ptrDivisionTable = new byte[nAllSubbandCount];
|
|
m_ptrRevolveCode = new byte[nAllSubbandCount * 10];
|
|
m_ptrWeightCode = new int[nAllSubbandCount * 10];
|
|
m_ptrCoefficient = new int[nAllSubbandCount * 10];
|
|
m_nBufLength = nSampleCount;
|
|
}
|
|
if (context.GetABit() != 0)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
int nLastDivision = -1;
|
|
m_ptrNextDivision = 0; // within m_ptrDivisionTable;
|
|
m_ptrNextRevCode = 0; // within m_ptrRevolveCode;
|
|
m_ptrNextWeight = 0; // within m_ptrWeightCode;
|
|
m_ptrNextCoefficient = 0; // within m_ptrCoefficient;
|
|
|
|
uint i, j, k;
|
|
for (i = 0; i < nSubbandCount; i ++)
|
|
{
|
|
int nDivisionCode = (int)context.GetNBits (2);
|
|
m_ptrDivisionTable[m_ptrNextDivision++] = (byte)nDivisionCode;
|
|
|
|
bool fLeadBlock = false;
|
|
if (nDivisionCode != nLastDivision)
|
|
{
|
|
if (i != 0)
|
|
{
|
|
m_ptrRevolveCode[m_ptrNextRevCode++] = (byte)context.GetNBits (2);
|
|
m_ptrWeightCode[m_ptrNextWeight++] = (int)context.GetNBits (32);
|
|
m_ptrCoefficient[m_ptrNextCoefficient++] = (int)context.GetNBits (16);
|
|
}
|
|
fLeadBlock = true;
|
|
nLastDivision = nDivisionCode;
|
|
}
|
|
uint nDivisionCount = 1u << nDivisionCode;
|
|
for (k = 0; k < nDivisionCount; k++)
|
|
{
|
|
if (fLeadBlock)
|
|
{
|
|
m_ptrRevolveCode[m_ptrNextRevCode++] = (byte)context.GetNBits (2);
|
|
fLeadBlock = false;
|
|
}
|
|
else
|
|
{
|
|
m_ptrRevolveCode[m_ptrNextRevCode++] = (byte)context.GetNBits (4);
|
|
}
|
|
m_ptrWeightCode[m_ptrNextWeight++] = (int)context.GetNBits (32);
|
|
m_ptrCoefficient[m_ptrNextCoefficient++] = (int)context.GetNBits (16);
|
|
}
|
|
}
|
|
if (nSubbandCount > 0)
|
|
{
|
|
m_ptrRevolveCode[m_ptrNextRevCode++] = (byte)context.GetNBits (2);
|
|
m_ptrWeightCode[m_ptrNextWeight++] = (int)context.GetNBits (32);
|
|
m_ptrCoefficient[m_ptrNextCoefficient++] = (int)context.GetNBits (16);
|
|
}
|
|
if (context.GetABit() != 0)
|
|
{
|
|
return false;
|
|
}
|
|
if (0 != (datahdr.Flags & MIO_LEAD_BLOCK))
|
|
{
|
|
if (m_mioih.Architecture != EriCode.Nemesis)
|
|
{
|
|
(context as HuffmanDecodeContext).PrepareToDecodeERINACode();
|
|
}
|
|
else
|
|
{
|
|
throw new NotImplementedException ("Nemesis encoding not implemented");
|
|
// context.PrepareToDecodeERISACode( );
|
|
}
|
|
}
|
|
else if (m_mioih.Architecture == EriCode.Nemesis)
|
|
{
|
|
throw new NotImplementedException ("Nemesis encoding not implemented");
|
|
// context.InitializeERISACode( );
|
|
}
|
|
if (m_mioih.Architecture != EriCode.Nemesis)
|
|
{
|
|
if (context.DecodeBytes (m_ptrBuffer3, nAllSampleCount * 2) < nAllSampleCount * 2)
|
|
{
|
|
return false;
|
|
}
|
|
int ptrHBuf = 0; // within m_ptrBuffer3;
|
|
int ptrLBuf = (int)nAllSampleCount; // within m_ptrBuffer3
|
|
|
|
for (i = 0; i < nDegreeWidth * 2; i++)
|
|
{
|
|
int ptrQuantumized = (int)i; // within (PINT) m_ptrBuffer2
|
|
for (j = 0; j < nAllSubbandCount; j++)
|
|
{
|
|
int nLow = m_ptrBuffer3[ptrLBuf++];
|
|
int nHigh = m_ptrBuffer3[ptrHBuf++] ^ (nLow >> 8);
|
|
m_ptrBuffer2[ptrQuantumized] = (nLow & 0xFF) | (nHigh << 8);
|
|
ptrQuantumized += (int)nDegreeWidth * 2;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
throw new NotImplementedException ("Nemesis encoding not implemented");
|
|
/*
|
|
if ( context.DecodeERISACodeWords
|
|
( (SWORD*) m_ptrBuffer3, nAllSampleCount ) < nAllSampleCount )
|
|
{
|
|
return false;
|
|
}
|
|
for ( i = 0; i < nAllSampleCount; i ++ )
|
|
{
|
|
((PINT)m_ptrBuffer2)[i] = ((SWORD*)m_ptrBuffer3)[i];
|
|
}
|
|
*/
|
|
}
|
|
uint nSamples;
|
|
uint nRestSamples = datahdr.SampleCount;
|
|
// int ptrDstBuf = wave_pos; // within (SWORD*) ptrWaveBuf;
|
|
|
|
nLastDivision = -1;
|
|
m_ptrNextDivision = 0; // m_ptrDivisionTable;
|
|
m_ptrNextRevCode = 0; // m_ptrRevolveCode;
|
|
m_ptrNextWeight = 0; // m_ptrWeightCode;
|
|
m_ptrNextCoefficient = 0; // m_ptrCoefficient;
|
|
m_ptrNextSource = 0; // (PINT) m_ptrBuffer2;
|
|
|
|
for (i = 0; i < nSubbandCount; i++)
|
|
{
|
|
int nDivisionCode = m_ptrDivisionTable[m_ptrNextDivision++];
|
|
uint nDivisionCount = 1u << nDivisionCode;
|
|
|
|
bool fLeadBlock = false;
|
|
if (nLastDivision != nDivisionCode)
|
|
{
|
|
if (i != 0)
|
|
{
|
|
nSamples = Math.Min (nRestSamples, (uint)m_nDegreeNum);
|
|
DecodePostBlock_MSS (ptrWaveBuf, wave_pos, nSamples);
|
|
nRestSamples -= nSamples;
|
|
wave_pos += (int)(nSamples * nChannelCount * sizeof(short));
|
|
}
|
|
InitializeWithDegree (m_mioih.SubbandDegree - nDivisionCode);
|
|
nLastDivision = nDivisionCode;
|
|
fLeadBlock = true;
|
|
}
|
|
for (k = 0; k < nDivisionCount; k++)
|
|
{
|
|
if (fLeadBlock)
|
|
{
|
|
DecodeLeadBlock_MSS();
|
|
fLeadBlock = false;
|
|
}
|
|
else
|
|
{
|
|
nSamples = nRestSamples;
|
|
if (nSamples > m_nDegreeNum)
|
|
{
|
|
nSamples = (uint)m_nDegreeNum;
|
|
}
|
|
DecodeInternalBlock_MSS (ptrWaveBuf, wave_pos, nSamples);
|
|
nRestSamples -= nSamples;
|
|
wave_pos += (int)(nSamples * nChannelCount * sizeof(short));
|
|
}
|
|
}
|
|
}
|
|
if (nSubbandCount > 0)
|
|
{
|
|
nSamples = nRestSamples;
|
|
if (nSamples > m_nDegreeNum)
|
|
{
|
|
nSamples = (uint)m_nDegreeNum;
|
|
}
|
|
DecodePostBlock_MSS (ptrWaveBuf, wave_pos, nSamples);
|
|
nRestSamples -= nSamples;
|
|
wave_pos += (int)(nSamples * nChannelCount) * sizeof(short);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void DecodeLeadBlock_MSS ()
|
|
{
|
|
uint i, j;
|
|
uint nHalfDegree = (uint)m_nDegreeNum / 2;
|
|
int nWeightCode = m_ptrWeightCode[m_ptrNextWeight++];
|
|
int nCoefficient = m_ptrCoefficient[m_ptrNextCoefficient++];
|
|
int ptrLapBuf = 0; // within m_ptrLastDCT;
|
|
|
|
for (i = 0; i < 2; i++)
|
|
{
|
|
int ptrSrcBuf = 0; // within (PINT) m_ptrBuffer1;
|
|
for (j = 0; j < nHalfDegree; j++)
|
|
{
|
|
m_ptrBuffer1[ptrSrcBuf + j * 2] = 0;
|
|
m_ptrBuffer1[ptrSrcBuf + j * 2 + 1] = m_ptrBuffer2[m_ptrNextSource++];
|
|
}
|
|
IQuantumize (m_ptrLastDCT, ptrLapBuf, m_ptrBuffer1, ptrSrcBuf, m_nDegreeNum, nWeightCode, nCoefficient);
|
|
ptrLapBuf += (int)m_nDegreeNum;
|
|
}
|
|
int nRevCode = m_ptrRevolveCode[m_ptrNextRevCode++];
|
|
|
|
int ptrLapBuf1 = 0; // m_ptrLastDCT;
|
|
int ptrLapBuf2 = (int)m_nDegreeNum; // m_ptrLastDCT
|
|
|
|
float rSin = (float)Math.Sin (nRevCode * Math.PI / 8);
|
|
float rCos = (float)Math.Cos (nRevCode * Math.PI / 8);
|
|
Erisa.Revolve2x2 (m_ptrLastDCT, ptrLapBuf1, m_ptrLastDCT, ptrLapBuf2, rSin, rCos, 1, m_nDegreeNum);
|
|
|
|
ptrLapBuf = 0; //m_ptrLastDCT;
|
|
for (i = 0; i < 2; i++)
|
|
{
|
|
Erisa.OddGivensInverseMatrix (m_ptrLastDCT, ptrLapBuf, m_pRevolveParam, m_nSubbandDegree);
|
|
|
|
for (j = 0; j < m_nDegreeNum; j += 2)
|
|
{
|
|
m_ptrLastDCT[ptrLapBuf + j] = m_ptrLastDCT[ptrLapBuf + j + 1];
|
|
}
|
|
Erisa.FastIPLOT (m_ptrLastDCT, ptrLapBuf, m_nSubbandDegree);
|
|
ptrLapBuf += (int)m_nDegreeNum;
|
|
}
|
|
}
|
|
|
|
void DecodeInternalBlock_MSS (byte[] ptrDst, int iDst, uint nSamples)
|
|
{
|
|
int ptrSrcBuf = 0; // m_ptrMatrixBuf;
|
|
int ptrLapBuf = 0; // m_ptrLastDCT;
|
|
|
|
int nWeightCode = m_ptrWeightCode[m_ptrNextWeight++];
|
|
int nCoefficient = m_ptrCoefficient[m_ptrNextCoefficient++];
|
|
|
|
for (int i = 0; i < 2; i++)
|
|
{
|
|
IQuantumize (m_ptrMatrixBuf, ptrSrcBuf, m_ptrBuffer2, m_ptrNextSource, m_nDegreeNum, nWeightCode, nCoefficient);
|
|
m_ptrNextSource += m_nDegreeNum;
|
|
ptrSrcBuf += m_nDegreeNum;
|
|
}
|
|
int nRevCode = m_ptrRevolveCode[m_ptrNextRevCode++];
|
|
int nRevCode1 = (nRevCode >> 2) & 0x03;
|
|
int nRevCode2 = (nRevCode & 0x03);
|
|
|
|
int ptrSrcBuf1 = 0; // m_ptrMatrixBuf;
|
|
int ptrSrcBuf2 = m_nDegreeNum; // m_ptrMatrixBuf + m_nDegreeNum;
|
|
|
|
float rSin = (float) Math.Sin (nRevCode1 * Math.PI / 8);
|
|
float rCos = (float) Math.Cos (nRevCode1 * Math.PI / 8);
|
|
Erisa.Revolve2x2 (m_ptrMatrixBuf, ptrSrcBuf1, m_ptrMatrixBuf, ptrSrcBuf2, rSin, rCos, 2, m_nDegreeNum / 2);
|
|
|
|
rSin = (float) Math.Sin (nRevCode2 * Math.PI / 8);
|
|
rCos = (float) Math.Cos (nRevCode2 * Math.PI / 8);
|
|
Erisa.Revolve2x2 (m_ptrMatrixBuf, ptrSrcBuf1 + 1, m_ptrMatrixBuf, ptrSrcBuf2 + 1, rSin, rCos, 2, m_nDegreeNum / 2);
|
|
|
|
ptrSrcBuf = 0; // m_ptrMatrixBuf;
|
|
|
|
for (int i = 0; i < 2; i++)
|
|
{
|
|
Erisa.OddGivensInverseMatrix (m_ptrMatrixBuf, ptrSrcBuf, m_pRevolveParam, m_nSubbandDegree);
|
|
Erisa.FastIPLOT (m_ptrMatrixBuf, ptrSrcBuf, m_nSubbandDegree);
|
|
Erisa.FastILOT (m_ptrWorkBuf, m_ptrLastDCT, ptrLapBuf, m_ptrMatrixBuf, ptrSrcBuf, m_nSubbandDegree);
|
|
|
|
Array.Copy (m_ptrMatrixBuf, ptrSrcBuf, m_ptrLastDCT, ptrLapBuf, m_nDegreeNum);
|
|
Array.Copy (m_ptrWorkBuf, 0, m_ptrMatrixBuf, ptrSrcBuf, m_nDegreeNum);
|
|
|
|
Erisa.FastIDCT (m_ptrInternalBuf, m_ptrMatrixBuf, ptrSrcBuf, 1, m_ptrWorkBuf, m_nSubbandDegree);
|
|
if (nSamples != 0)
|
|
{
|
|
Erisa.RoundR32ToWordArray (ptrDst, iDst + (int)i*2, 2, m_ptrInternalBuf, (int)nSamples);
|
|
}
|
|
ptrSrcBuf += m_nDegreeNum;
|
|
ptrLapBuf += m_nDegreeNum;
|
|
}
|
|
}
|
|
|
|
void DecodePostBlock_MSS (byte[] ptrDst, int iDst, uint nSamples)
|
|
{
|
|
int ptrLapBuf = 0; // m_ptrLastDCT;
|
|
int ptrSrcBuf = 0; // m_ptrMatrixBuf;
|
|
|
|
int i, j;
|
|
uint nHalfDegree = (uint)m_nDegreeNum / 2u;
|
|
int nWeightCode = m_ptrWeightCode[m_ptrNextWeight++];
|
|
int nCoefficient = m_ptrCoefficient[m_ptrNextCoefficient++];
|
|
|
|
for (i = 0; i < 2; i++)
|
|
{
|
|
for (j = 0; j < nHalfDegree; j++)
|
|
{
|
|
m_ptrBuffer1[j * 2] = 0;
|
|
m_ptrBuffer1[j * 2 + 1] = m_ptrBuffer2[m_ptrNextSource++];
|
|
}
|
|
IQuantumize (m_ptrMatrixBuf, ptrSrcBuf, m_ptrBuffer1, 0, m_nDegreeNum, nWeightCode, nCoefficient);
|
|
ptrSrcBuf += m_nDegreeNum;
|
|
}
|
|
float rSin, rCos;
|
|
int nRevCode = m_ptrRevolveCode[m_ptrNextRevCode++];
|
|
|
|
int ptrSrcBuf1 = 0; // m_ptrMatrixBuf;
|
|
int ptrSrcBuf2 = m_nDegreeNum; // m_ptrMatrixBuf + m_nDegreeNum;
|
|
|
|
rSin = (float) Math.Sin (nRevCode * Math.PI / 8);
|
|
rCos = (float) Math.Cos (nRevCode * Math.PI / 8);
|
|
Erisa.Revolve2x2 (m_ptrMatrixBuf, ptrSrcBuf1, m_ptrMatrixBuf, ptrSrcBuf2, rSin, rCos, 1, m_nDegreeNum);
|
|
|
|
ptrSrcBuf = 0; // m_ptrMatrixBuf;
|
|
|
|
for (i = 0; i < 2; i ++)
|
|
{
|
|
Erisa.OddGivensInverseMatrix (m_ptrMatrixBuf, ptrSrcBuf, m_pRevolveParam, m_nSubbandDegree);
|
|
|
|
for (j = 0; j < m_nDegreeNum; j += 2)
|
|
{
|
|
m_ptrMatrixBuf[ptrSrcBuf + j] = -m_ptrMatrixBuf[ptrSrcBuf + j + 1];
|
|
}
|
|
Erisa.FastIPLOT (m_ptrMatrixBuf, ptrSrcBuf, m_nSubbandDegree);
|
|
Erisa.FastILOT (m_ptrWorkBuf, m_ptrLastDCT, ptrLapBuf, m_ptrMatrixBuf, ptrSrcBuf, m_nSubbandDegree);
|
|
|
|
Array.Copy (m_ptrWorkBuf, 0, m_ptrMatrixBuf, ptrSrcBuf, m_nDegreeNum);
|
|
|
|
Erisa.FastIDCT (m_ptrInternalBuf, m_ptrMatrixBuf, ptrSrcBuf, 1, m_ptrWorkBuf, m_nSubbandDegree);
|
|
if (nSamples != 0)
|
|
{
|
|
Erisa.RoundR32ToWordArray (ptrDst, iDst + (int)i*2, 2, m_ptrInternalBuf, (int)nSamples);
|
|
}
|
|
ptrLapBuf += m_nDegreeNum;
|
|
ptrSrcBuf += m_nDegreeNum;
|
|
}
|
|
}
|
|
|
|
void IQuantumize (float[] ptrDestination, int dst, int[] ptrQuantumized, int qsrc, int nDegreeNum, int nWeightCode, int nCoefficient)
|
|
{
|
|
int i, j;
|
|
double rMatrixScale = Math.Sqrt (2.0 / nDegreeNum);
|
|
double rCoefficient = rMatrixScale * nCoefficient;
|
|
double[] rAvgRatio = new double[7];
|
|
for (i = 0; i < 6; i++)
|
|
{
|
|
rAvgRatio[i] = 1.0 / Math.Pow (2.0, (((nWeightCode >> (i * 5)) & 0x1F) - 15) * 0.5);
|
|
}
|
|
rAvgRatio[6] = 1.0;
|
|
for (i = 0; i < m_nFrequencyPoint[0]; i++)
|
|
{
|
|
m_ptrWeightTable[i] = (float) rAvgRatio[0];
|
|
}
|
|
for (j = 1; j < 7; j++)
|
|
{
|
|
double a = rAvgRatio[j - 1];
|
|
double k = (rAvgRatio[j] - a) / (m_nFrequencyPoint[j] - m_nFrequencyPoint[j - 1]);
|
|
while (i < m_nFrequencyPoint[j])
|
|
{
|
|
m_ptrWeightTable[i] = (float)(k * (i - m_nFrequencyPoint[j - 1]) + a);
|
|
i++;
|
|
}
|
|
}
|
|
while (i < nDegreeNum)
|
|
{
|
|
m_ptrWeightTable[i++] = (float)rAvgRatio[6];
|
|
}
|
|
float rOddWeight = (float)((((nWeightCode >> 30) & 0x03) + 0x02) / 2.0);
|
|
for (i = 15; i < nDegreeNum; i += 16)
|
|
{
|
|
m_ptrWeightTable[i] *= rOddWeight;
|
|
}
|
|
m_ptrWeightTable[nDegreeNum-1] = (float) nCoefficient;
|
|
for (i = 0; i < nDegreeNum; i++)
|
|
{
|
|
m_ptrWeightTable[i] = 1.0F / m_ptrWeightTable[i];
|
|
}
|
|
for (i = 0; i < nDegreeNum; i ++)
|
|
{
|
|
ptrDestination[dst + i] = (float) (rCoefficient * m_ptrWeightTable[i] * ptrQuantumized[qsrc+i]);
|
|
}
|
|
}
|
|
}
|
|
}
|