Alien-FreeImage
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src/Source/LibJXR/image/decode/segdec.c view on Meta::CPAN
}
iCBPCY = pSC->MBInfo.iCBP[(i + 1) & 0xf];
assert (MAX_CHANNELS == 16);
}
/** update model at end of MB **/
UpdateModelMB (cf, iChannels, aLaplacianMean, &(pContext->m_aModelAC));
return ICERR_OK;
}
/*************************************************************************
DecodeSignificantAbsLevel
*************************************************************************/
#ifndef X86OPT_INLINE
static Int DecodeSignificantAbsLevel (struct CAdaptiveHuffman *pAHexpt, BitIOInfo* pIO)
#else
static __forceinline Int DecodeSignificantAbsLevel (struct CAdaptiveHuffman *pAHexpt, BitIOInfo* pIO)
#endif
{
UInt iIndex;
Int iFixed, iLevel;
static const Int aRemap[] = { 2, 3, 4, 6, 10, 14 };
static const Int aFixedLength[] = { 0, 0, 1, 2, 2, 2 };
iIndex = (UInt)getHuff (pAHexpt->m_hufDecTable, pIO);
assert(iIndex <= 6);
pAHexpt->m_iDiscriminant += pAHexpt->m_pDelta[iIndex];
if (iIndex < 2) {
iLevel = iIndex + 2; // = aRemap[iIndex]
}
else if (iIndex < 6) {
iFixed = aFixedLength[iIndex];
iLevel = aRemap[iIndex] + _getBit16 (pIO, iFixed);
}
else{
iFixed = _getBit16 (pIO, 4) + 4;
if (iFixed == 19) {
iFixed += _getBit16 (pIO, 2);
if (iFixed == 22) {
iFixed += _getBit16 (pIO, 3);
}
}
iLevel = 2 + (1 << iFixed);
iIndex = getBit32 (pIO, iFixed);
iLevel += iIndex;
}
return iLevel;
}
U8 decodeQPIndex(BitIOInfo* pIO,U8 cBits)
{
if(_getBit16(pIO, 1) == 0)
return 0;
return (U8)(_getBit16(pIO, cBits) + 1);
}
/*************************************************************************
DecodeSecondStageCoeff
*************************************************************************/
Int DecodeMacroblockLowpass (CWMImageStrCodec * pSC, CCodingContext *pContext,
Int iMBX, Int iMBYdummy)
{
const COLORFORMAT cf = pSC->m_param.cfColorFormat;
const Int iChannels = (Int) pSC->m_param.cNumChannels;
const Int iFullPlanes = (cf == YUV_420 || cf == YUV_422) ? 2 : iChannels;
Int k;
CAdaptiveScan *pScan = pContext->m_aScanLowpass;
BitIOInfo* pIO = pContext->m_pIOLP;
Int iModelBits = pContext->m_aModelLP.m_iFlcBits[0];
Int aRLCoeffs[32], iNumNonzero = 0, iIndex = 0;
Int aLaplacianMean[2] = { 0, 0}, *pLM = aLaplacianMean;
Int iChannel, iCBP = 0;
#ifndef ARMOPT_BITIO // ARM opt always uses 32-bit version of getBits
U32 (*getBits)(BitIOInfo* pIO, U32 cBits) = _getBit16;
#endif
CWMIMBInfo * pMBInfo = &pSC->MBInfo;
I32 *aDC[MAX_CHANNELS];
UNREFERENCED_PARAMETER( iMBX );
UNREFERENCED_PARAMETER( iMBYdummy );
readIS_L1(pSC, pIO);
if((pSC->WMISCP.bfBitstreamFormat != SPATIAL) && (pSC->pTile[pSC->cTileColumn].cBitsLP > 0)) // MB-based LP QP index
pMBInfo->iQIndexLP = decodeQPIndex(pIO, pSC->pTile[pSC->cTileColumn].cBitsLP);
// set arrays
for (k = 0; k < (Int) pSC->m_param.cNumChannels; k++) {
aDC[k & 15] = pMBInfo->iBlockDC[k];
}
/** reset adaptive scan totals **/
if (pSC->m_bResetRGITotals) {
int iScale = 2;
int iWeight = iScale * 16;
pScan[0].uTotal = MAXTOTAL;
for (k = 1; k < 16; k++) {
pScan[k].uTotal = iWeight;
iWeight -= iScale;
}
}
/** in raw mode, this can take 6% of the bits in the extreme low rate case!!! **/
if (cf == YUV_420 || cf == YUV_422 || cf == YUV_444) {
int iCountM = pContext->m_iCBPCountMax, iCountZ = pContext->m_iCBPCountZero;
int iMax = iFullPlanes * 4 - 5; /* actually (1 << iNChannels) - 1 **/
if (iCountZ <= 0 || iCountM < 0) {
iCBP = 0;
if (_getBool16 (pIO)) {
iCBP = 1;
k = _getBit16 (pIO, iFullPlanes - 1);
if (k) {
iCBP = k * 2 + _getBit16(pIO, 1);
}
}
if (iCountM < iCountZ)
iCBP = iMax - iCBP;
}
else {
iCBP = _getBit16(pIO, iFullPlanes);
}
src/Source/LibJXR/image/decode/segdec.c view on Meta::CPAN
if (pCoeffs[k]) {
Int r1 = _rotl(pCoeffs[k], iModelBits);
pCoeffs[k] = (r1 ^ getBits(pIO, iModelBits)) - (r1 & iMask);
}
#else // WIN32
if (pCoeffs[k] > 0) {
pCoeffs[k] <<= iModelBits;
pCoeffs[k] += getBits (pIO, iModelBits);
}
else if (pCoeffs[k] < 0) {
pCoeffs[k] <<= iModelBits;
pCoeffs[k] -= getBits (pIO, iModelBits);
}
#endif // WIN32
else {
//pCoeffs[k] = getBits (pIO, iModelBits);
//if (pCoeffs[k] && _getBool16 (pIO))
// pCoeffs[k] = -pCoeffs[k];
Int r1 = _peekBit16 (pIO, iModelBits + 1);
pCoeffs[k] = ((r1 >> 1) ^ (-(r1 & 1))) + (r1 & 1);
_flushBit16 (pIO, iModelBits + (pCoeffs[k] != 0));
}
}
}
}
pLM = aLaplacianMean + 1;
iModelBits = pContext->m_aModelLP.m_iFlcBits[1];
iCBP >>= 1;
}
UpdateModelMB (cf, iChannels, aLaplacianMean, &(pContext->m_aModelLP));
if (pSC->m_bResetContext) {
AdaptLowpassDec(pContext);
}
return ICERR_OK;
}
/*************************************************************************
8 bit YUV 420 macroblock decode function with 4x4 transform
Index order is as follows:
Y: U: V:
0 1 4 5 16 17 20 21
2 3 6 7 18 19 22 23
8 9 12 13
10 11 14 15
DCAC coefficients stored for 4x4 - offsets (x == no storage)
Y:
x x x [0..3]
x x x [4..7]
x x x [8..11]
[16..19] [20..23] [24..27] [28..31,12..15]
U, V:
x [0..3]
[8..11] [4..7,12..15]
*************************************************************************/
Int DecodeMacroblockDC(CWMImageStrCodec * pSC, CCodingContext *pContext, Int iMBX, Int iMBY)
{
CWMITile * pTile = pSC->pTile + pSC->cTileColumn;
CWMIMBInfo * pMBInfo = &pSC->MBInfo;
const COLORFORMAT cf = pSC->m_param.cfColorFormat;
const Int iChannels = (Int) pSC->m_param.cNumChannels;
BitIOInfo* pIO = pContext->m_pIODC;
Int iIndex, i;
Int aLaplacianMean[2] = { 0, 0}, *pLM = aLaplacianMean;
Int iModelBits = pContext->m_aModelDC.m_iFlcBits[0];
struct CAdaptiveHuffman *pAH;
Int iQDCY, iQDCU, iQDCV;
// const Int iChromaElements = (cf == YUV_420) ? 8 * 8 : ((cf == YUV_422) ? 8 * 16 : 16 * 16);
UNREFERENCED_PARAMETER( iMBX );
UNREFERENCED_PARAMETER( iMBY );
for (i = 0; i < iChannels; i++)
memset (pMBInfo->iBlockDC[i], 0, 16 * sizeof (I32));
readIS_L1(pSC, pIO);
pMBInfo->iQIndexLP = pMBInfo->iQIndexHP = 0;
if(pSC->WMISCP.bfBitstreamFormat == SPATIAL && pSC->WMISCP.sbSubband != SB_DC_ONLY){
if(pTile->cBitsLP > 0) // MB-based LP QP index
pMBInfo->iQIndexLP = decodeQPIndex(pIO, pTile->cBitsLP);
if( pSC->WMISCP.sbSubband != SB_NO_HIGHPASS && pTile->cBitsHP > 0) // MB-based HP QP index
pMBInfo->iQIndexHP = decodeQPIndex(pIO, pTile->cBitsHP);
}
if(pTile->cBitsHP == 0 && pTile->cNumQPHP > 1) // use LP QP
pMBInfo->iQIndexHP = pMBInfo->iQIndexLP;
if (pMBInfo->iQIndexLP >= pTile->cNumQPLP || pMBInfo->iQIndexHP >= pTile->cNumQPHP)
return ICERR_ERROR;
if(cf == Y_ONLY || cf == CMYK || cf == NCOMPONENT) {
for (i = 0; i < iChannels; i++) {
iQDCY = 0;
/** get luminance DC **/
if (_getBool16 (pIO)) {
iQDCY = DecodeSignificantAbsLevel(pContext->m_pAHexpt[3], pIO) - 1;
*pLM += 1;
}
if (iModelBits) {
iQDCY = (iQDCY << iModelBits) | _getBit16(pIO, iModelBits);
}
if (iQDCY && _getBool16 (pIO))
iQDCY = -iQDCY;
pMBInfo->iBlockDC[i][0] = iQDCY;
pLM = aLaplacianMean + 1;
iModelBits = pContext->m_aModelDC.m_iFlcBits[1];
}
}
else {
/** find significant level in 3D **/
pAH = pContext->m_pAHexpt[2];
iIndex = getHuff (pAH->m_hufDecTable, pIO);
iQDCY = iIndex >> 2;
iQDCU = (iIndex >> 1) & 1;
iQDCV = iIndex & 1;
/** get luminance DC **/
if (iQDCY) {
iQDCY = DecodeSignificantAbsLevel(pContext->m_pAHexpt[3], pIO) - 1;
*pLM += 1;
}
if (iModelBits) {
iQDCY = (iQDCY << iModelBits) | _getBit16(pIO, iModelBits);
}
if (iQDCY && _getBool16 (pIO))
iQDCY = -iQDCY;
pMBInfo->iBlockDC[0][0] = iQDCY;
/** get chrominance DC **/
pLM = aLaplacianMean + 1;
iModelBits = pContext->m_aModelDC.m_iFlcBits[1];
if (iQDCU) {
iQDCU = DecodeSignificantAbsLevel(pContext->m_pAHexpt[4], pIO) - 1;
*pLM += 1;
}
if (iModelBits) {
iQDCU = (iQDCU << iModelBits) | _getBit16(pIO, iModelBits);
}
if (iQDCU && _getBool16 (pIO))
iQDCU = -iQDCU;
pMBInfo->iBlockDC[1][0] = iQDCU;
if (iQDCV) {
iQDCV = DecodeSignificantAbsLevel(pContext->m_pAHexpt[4], pIO) - 1;
*pLM += 1;
}
if (iModelBits) {
iQDCV = (iQDCV << iModelBits) | _getBit16(pIO, iModelBits);
}
if (iQDCV && _getBool16 (pIO))
iQDCV = -iQDCV;
pMBInfo->iBlockDC[2][0] = iQDCV;
}
UpdateModelMB (cf, iChannels, aLaplacianMean, &(pContext->m_aModelDC));
if(((!(pSC->WMISCP.bfBitstreamFormat != FREQUENCY || pSC->m_Dparam->cThumbnailScale < 16)) || pSC->WMISCP.sbSubband == SB_DC_ONLY) && pSC->m_bResetContext){
Int kk;
for (kk = 2; kk < 5; kk++) {
if (ICERR_OK != AdaptDecFixed (pContext->m_pAHexpt[kk])) {
return ICERR_ERROR;
}
}
}
return ICERR_OK;
}
/*************************************************************************
DecodeMacroblockHighpass
*************************************************************************/
Int DecodeMacroblockHighpass (CWMImageStrCodec *pSC, CCodingContext *pContext,
Int iMBX, Int iMBY)
{
/** reset adaptive scan totals **/
if (pSC->m_bResetRGITotals) {
int iScale = 2, k;
int iWeight = iScale * 16;
pContext->m_aScanHoriz[0].uTotal = pContext->m_aScanVert[0].uTotal = MAXTOTAL;
for (k = 1; k < 16; k++) {
pContext->m_aScanHoriz[k].uTotal = pContext->m_aScanVert[k].uTotal = iWeight;
iWeight -= iScale;
}
}
if((pSC->WMISCP.bfBitstreamFormat != SPATIAL) && (pSC->pTile[pSC->cTileColumn].cBitsHP > 0)) { // MB-based HP QP index
pSC->MBInfo.iQIndexHP = decodeQPIndex(pContext->m_pIOAC, pSC->pTile[pSC->cTileColumn].cBitsHP);
if (pSC->MBInfo.iQIndexHP >= pSC->pTile[pSC->cTileColumn].cNumQPHP)
goto ErrorExit;
}
else if(pSC->pTile[pSC->cTileColumn].cBitsHP == 0 && pSC->pTile[pSC->cTileColumn].cNumQPHP > 1) // use LP QP
pSC->MBInfo.iQIndexHP = pSC->MBInfo.iQIndexLP;
DecodeCBP (pSC, pContext);
predCBPDec(pSC, pContext);
if (DecodeCoeffs (pSC, pContext, iMBX, iMBY,
pContext->m_pIOAC, pContext->m_pIOFL) != ICERR_OK)
goto ErrorExit;
if (pSC->m_bResetContext) {
AdaptHighpassDec(pContext);
}
return ICERR_OK;
ErrorExit:
return ICERR_ERROR;
}
/*************************************************************************
Adapt
*************************************************************************/
Int AdaptLowpassDec(CCodingContext * pSC)
{
Int kk;
for (kk = 0; kk < CONTEXTX + CTDC; kk++) {
if (ICERR_OK != AdaptDecFixed (pSC->m_pAHexpt[kk])) {
goto ErrorExit;
}
}
return ICERR_OK;
ErrorExit:
return ICERR_ERROR;
}
Int AdaptHighpassDec(CCodingContext * pSC)
{
Int kk;
if (ICERR_OK != AdaptDecFixed (pSC->m_pAdaptHuffCBPCY)) {
goto ErrorExit;
( run in 0.454 second using v1.01-cache-2.11-cpan-71847e10f99 )