/*
* 21.04.2004 Original verion. davagin@udm.ru.
*-----------------------------------------------------------------------
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*----------------------------------------------------------------------
*/
package davaguine.jmac.decoder;
import davaguine.jmac.info.CompressionLevel;
import davaguine.jmac.info.SpecialFrame;
import davaguine.jmac.tools.JMACException;
import java.io.IOException;
import java.util.Arrays;
/**
* Author: Dmitry Vaguine
* Date: 04.03.2004
* Time: 14:51:31
*/
public class APEDecompressCore {
public APEDecompressCore(IAPEDecompress pAPEDecompress) {
m_pAPEDecompress = pAPEDecompress;
//initialize the bit array
m_pUnBitArray = UnBitArrayBase.CreateUnBitArray(pAPEDecompress, pAPEDecompress.getApeInfoFileVersion());
if (pAPEDecompress.getApeInfoFileVersion() >= 3930)
throw new JMACException("Wrong Version");
m_pAntiPredictorX = AntiPredictor.CreateAntiPredictor(pAPEDecompress.getApeInfoCompressionLevel(), pAPEDecompress.getApeInfoFileVersion());
m_pAntiPredictorY = AntiPredictor.CreateAntiPredictor(pAPEDecompress.getApeInfoCompressionLevel(), pAPEDecompress.getApeInfoFileVersion());
m_pDataX = new int[pAPEDecompress.getApeInfoBlocksPerFrame() + 16];
m_pDataY = new int[pAPEDecompress.getApeInfoBlocksPerFrame() + 16];
m_pTempData = new int[pAPEDecompress.getApeInfoBlocksPerFrame() + 16];
m_nBlocksProcessed = 0;
}
public void GenerateDecodedArrays(int nBlocks, int nSpecialCodes, int nFrameIndex) throws IOException {
if (m_pAPEDecompress.getApeInfoChannels() == 2) {
if ((nSpecialCodes & SpecialFrame.SPECIAL_FRAME_LEFT_SILENCE) > 0 && (nSpecialCodes & SpecialFrame.SPECIAL_FRAME_RIGHT_SILENCE) > 0) {
Arrays.fill(m_pDataX, 0, nBlocks, 0);
Arrays.fill(m_pDataY, 0, nBlocks, 0);
} else if ((nSpecialCodes & SpecialFrame.SPECIAL_FRAME_PSEUDO_STEREO) > 0) {
GenerateDecodedArray(m_pDataX, nBlocks, nFrameIndex, m_pAntiPredictorX);
Arrays.fill(m_pDataY, 0, nBlocks, 0);
} else {
GenerateDecodedArray(m_pDataX, nBlocks, nFrameIndex, m_pAntiPredictorX);
GenerateDecodedArray(m_pDataY, nBlocks, nFrameIndex, m_pAntiPredictorY);
}
} else {
if ((nSpecialCodes & SpecialFrame.SPECIAL_FRAME_LEFT_SILENCE) > 0)
Arrays.fill(m_pDataX, 0, nBlocks, 0);
else
GenerateDecodedArray(m_pDataX, nBlocks, nFrameIndex, m_pAntiPredictorX);
}
}
public void GenerateDecodedArray(int[] Input_Array, int Number_of_Elements, int Frame_Index, AntiPredictor pAntiPredictor) throws IOException {
final int nFrameBytes = m_pAPEDecompress.getApeInfoFrameBytes(Frame_Index);
//run the prediction sequence
switch (m_pAPEDecompress.getApeInfoCompressionLevel()) {
case CompressionLevel.COMPRESSION_LEVEL_FAST:
if (m_pAPEDecompress.getApeInfoFileVersion() < 3320) {
m_pUnBitArray.GenerateArray(m_pTempData, Number_of_Elements, nFrameBytes);
pAntiPredictor.AntiPredict(m_pTempData, Input_Array, Number_of_Elements);
} else {
m_pUnBitArray.GenerateArray(Input_Array, Number_of_Elements, nFrameBytes);
pAntiPredictor.AntiPredict(Input_Array, null, Number_of_Elements);
}
break;
case CompressionLevel.COMPRESSION_LEVEL_NORMAL:
{
//get the array from the bitstream
m_pUnBitArray.GenerateArray(m_pTempData, Number_of_Elements, nFrameBytes);
pAntiPredictor.AntiPredict(m_pTempData, Input_Array, Number_of_Elements);
break;
}
case CompressionLevel.COMPRESSION_LEVEL_HIGH:
//get the array from the bitstream
m_pUnBitArray.GenerateArray(m_pTempData, Number_of_Elements, nFrameBytes);
pAntiPredictor.AntiPredict(m_pTempData, Input_Array, Number_of_Elements);
break;
case CompressionLevel.COMPRESSION_LEVEL_EXTRA_HIGH:
long nNumberOfCoefficients;
if (m_pAPEDecompress.getApeInfoFileVersion() < 3320) {
nNumberOfCoefficients = m_pUnBitArray.DecodeValue(DecodeValueMethod.DECODE_VALUE_METHOD_X_BITS, 4);
for (int z = 0; z <= nNumberOfCoefficients; z++) {
aryCoefficientsA[z] = m_pUnBitArray.DecodeValue(DecodeValueMethod.DECODE_VALUE_METHOD_X_BITS, 6);
aryCoefficientsB[z] = m_pUnBitArray.DecodeValue(DecodeValueMethod.DECODE_VALUE_METHOD_X_BITS, 6);
}
m_pUnBitArray.GenerateArray(m_pTempData, Number_of_Elements, nFrameBytes);
((AntiPredictorExtraHigh0000To3320) pAntiPredictor).AntiPredict(m_pTempData, Input_Array, Number_of_Elements, (int) nNumberOfCoefficients, aryCoefficientsA, aryCoefficientsB);
} else if (m_pAPEDecompress.getApeInfoFileVersion() < 3600) {
nNumberOfCoefficients = m_pUnBitArray.DecodeValue(DecodeValueMethod.DECODE_VALUE_METHOD_X_BITS, 3);
for (int z = 0; z <= nNumberOfCoefficients; z++) {
aryCoefficientsA[z] = m_pUnBitArray.DecodeValue(DecodeValueMethod.DECODE_VALUE_METHOD_X_BITS, 5);
aryCoefficientsB[z] = m_pUnBitArray.DecodeValue(DecodeValueMethod.DECODE_VALUE_METHOD_X_BITS, 5);
}
m_pUnBitArray.GenerateArray(m_pTempData, Number_of_Elements, nFrameBytes);
((AntiPredictorExtraHigh3320To3600) pAntiPredictor).AntiPredict(m_pTempData, Input_Array, Number_of_Elements, (int) nNumberOfCoefficients, aryCoefficientsA, aryCoefficientsB);
} else if (m_pAPEDecompress.getApeInfoFileVersion() < 3700) {
nNumberOfCoefficients = m_pUnBitArray.DecodeValue(DecodeValueMethod.DECODE_VALUE_METHOD_X_BITS, 3);
for (int z = 0; z <= nNumberOfCoefficients; z++) {
aryCoefficientsA[z] = m_pUnBitArray.DecodeValue(DecodeValueMethod.DECODE_VALUE_METHOD_X_BITS, 6);
aryCoefficientsB[z] = m_pUnBitArray.DecodeValue(DecodeValueMethod.DECODE_VALUE_METHOD_X_BITS, 6);
}
m_pUnBitArray.GenerateArray(m_pTempData, Number_of_Elements, nFrameBytes);
((AntiPredictorExtraHigh3600To3700) pAntiPredictor).AntiPredict(m_pTempData, Input_Array, Number_of_Elements, (int) nNumberOfCoefficients, aryCoefficientsA, aryCoefficientsB);
} else if (m_pAPEDecompress.getApeInfoFileVersion() < 3800) {
nNumberOfCoefficients = m_pUnBitArray.DecodeValue(DecodeValueMethod.DECODE_VALUE_METHOD_X_BITS, 3);
for (int z = 0; z <= nNumberOfCoefficients; z++) {
aryCoefficientsA[z] = m_pUnBitArray.DecodeValue(DecodeValueMethod.DECODE_VALUE_METHOD_X_BITS, 6);
aryCoefficientsB[z] = m_pUnBitArray.DecodeValue(DecodeValueMethod.DECODE_VALUE_METHOD_X_BITS, 6);
}
m_pUnBitArray.GenerateArray(m_pTempData, Number_of_Elements, nFrameBytes);
((AntiPredictorExtraHigh3700To3800) pAntiPredictor).AntiPredict(m_pTempData, Input_Array, Number_of_Elements, (int) nNumberOfCoefficients, aryCoefficientsA, aryCoefficientsB);
} else {
m_pUnBitArray.GenerateArray(m_pTempData, Number_of_Elements, nFrameBytes);
((AntiPredictorExtraHigh3800ToCurrent) pAntiPredictor).AntiPredict(m_pTempData, Input_Array, Number_of_Elements, m_pAPEDecompress.getApeInfoFileVersion());
}
break;
}
}
public UnBitArrayBase GetUnBitArrray() {
return m_pUnBitArray;
}
private long[] aryCoefficientsA = new long[64];
private long[] aryCoefficientsB = new long[64];
public int[] m_pTempData;
public int[] m_pDataX;
public int[] m_pDataY;
public AntiPredictor m_pAntiPredictorX;
public AntiPredictor m_pAntiPredictorY;
public UnBitArrayBase m_pUnBitArray;
public UnBitArrayState m_BitArrayStateX = new UnBitArrayState();
public UnBitArrayState m_BitArrayStateY = new UnBitArrayState();
public IAPEDecompress m_pAPEDecompress;
public int m_nBlocksProcessed;
}