/**
* \brief Convert fitted Data Matrix region into a decoded message
* \param dec
* \param reg
* \param fix
* \return Decoded message
*/
extern DmtxMessage *
dmtxDecodeMatrixRegion(DmtxDecode *dec, DmtxRegion *reg, int fix)
{
DmtxMessage *msg;
DmtxVector2 topLeft, topRight, bottomLeft, bottomRight;
DmtxPixelLoc pxTopLeft, pxTopRight, pxBottomLeft, pxBottomRight;
msg = dmtxMessageCreate(reg->sizeIdx, DmtxFormatMatrix);
if(msg == NULL)
return NULL;
if(PopulateArrayFromMatrix(dec, reg, msg) != DmtxPass) {
dmtxMessageDestroy(&msg);
return NULL;
}
/* maybe place remaining logic into new dmtxDecodePopulatedArray()
function so other people can pass in their own arrays */
ModulePlacementEcc200(msg->array, msg->code,
reg->sizeIdx, DmtxModuleOnRed | DmtxModuleOnGreen | DmtxModuleOnBlue);
if(RsDecode(msg->code, reg->sizeIdx, fix) == DmtxFail)
{
dmtxMessageDestroy(&msg);
return NULL;
}
topLeft.X = bottomLeft.X = topLeft.Y = topRight.Y = -0.1;
topRight.X = bottomRight.X = bottomLeft.Y = bottomRight.Y = 1.1;
dmtxMatrix3VMultiplyBy(&topLeft, reg->fit2raw);
dmtxMatrix3VMultiplyBy(&topRight, reg->fit2raw);
dmtxMatrix3VMultiplyBy(&bottomLeft, reg->fit2raw);
dmtxMatrix3VMultiplyBy(&bottomRight, reg->fit2raw);
pxTopLeft.X = (int)(0.5 + topLeft.X);
pxTopLeft.Y = (int)(0.5 + topLeft.Y);
pxBottomLeft.X = (int)(0.5 + bottomLeft.X);
pxBottomLeft.Y = (int)(0.5 + bottomLeft.Y);
pxTopRight.X = (int)(0.5 + topRight.X);
pxTopRight.Y = (int)(0.5 + topRight.Y);
pxBottomRight.X = (int)(0.5 + bottomRight.X);
pxBottomRight.Y = (int)(0.5 + bottomRight.Y);
CacheFillQuad(dec, pxTopLeft, pxTopRight, pxBottomRight, pxBottomLeft);
DecodeDataStream(msg, reg->sizeIdx, NULL);
return msg;
}
//纠错
void ContentDecoder::CorrectDataBlocks()
{
int i,j,k;
int numSucceededCorrections = 0;
int numCorrectionFailures = 0;
m_ncAllCodeWord=QR_VersonInfo[m_nVersion].ncAllCodeWord;//int dataCapacity = qrCodeSymbol.getDataCapacity();
m_ncDataCodeWord = QR_VersonInfo[m_nVersion].ncDataCodeWord[m_nLevel];//...
m_ncRSCodeWord=m_ncAllCodeWord-m_ncDataCodeWord;//int numErrorCollectionCode = qrCodeSymbol.getNumErrorCollectionCode();
int ncBlock1 = QR_VersonInfo[m_nVersion].RS_BlockInfo1[m_nLevel].ncRSBlock;//...
int ncBlock2 = QR_VersonInfo[m_nVersion].RS_BlockInfo2[m_nLevel].ncRSBlock;//...
int ncBlockSum = ncBlock1 + ncBlock2;//int numRSBlocks = qrCodeSymbol.getNumRSBlocks();
int eccPerRSBlock = m_ncRSCodeWord / ncBlockSum;
if (ncBlockSum == 1)
{
RsDecode corrector = RsDecode(eccPerRSBlock / 2);
int ret = corrector.decode(m_byAllCodeWord,m_ncAllCodeWord);
if (ret > 0)
numSucceededCorrections += ret;
else if (ret < 0)
numCorrectionFailures++;
for(i=0;i<m_ncDataCodeWord;i++)
m_byDataCodeWord[i]=m_byAllCodeWord[i];
}
else
{ //interleave data blocks because symbol has 2 or more RS blocks
int * dataBlocks = new int[m_ncAllCodeWord];
memset(dataBlocks, 0, m_ncAllCodeWord);
int numLongerRSBlocks = m_ncAllCodeWord % ncBlockSum;
if (numLongerRSBlocks == 0)
{ //symbol has only 1 type of RS block
int lengthRSBlock = m_ncAllCodeWord / ncBlockSum;
unsigned char ** RSBlocks = new unsigned char * [ncBlockSum];//...
for(k=0;k<ncBlockSum;k++)
{
RSBlocks[k] = new unsigned char [lengthRSBlock];
memset(RSBlocks[k], 0, lengthRSBlock);
}//int[][] RSBlocks = new int[ncBlockSum][lengthRSBlock];
//obtain RS blocks
for (i = 0; i < ncBlockSum; i++)
{
for (j = 0; j < lengthRSBlock; j++)
{
RSBlocks[i][j] = m_byAllCodeWord[j * ncBlockSum + i];
}
RsDecode corrector = RsDecode(eccPerRSBlock / 2);
int ret = corrector.decode(RSBlocks[i],lengthRSBlock);
if (ret > 0)
numSucceededCorrections += ret;
else if (ret < 0)
numCorrectionFailures++;
}
//obtain only data part
int p = 0;
for (i = 0; i < ncBlockSum; i++)
{
for (j = 0; j < lengthRSBlock - eccPerRSBlock; j++)
{
dataBlocks[p++] = RSBlocks[i][j];
}
}
}
else
{ //symbol has 2 types of RS blocks
int lengthShorterRSBlock = m_ncAllCodeWord / ncBlockSum;
int lengthLongerRSBlock = m_ncAllCodeWord / ncBlockSum + 1;
int numShorterRSBlocks = ncBlockSum - numLongerRSBlocks;
unsigned char ** shorterRSBlocks = new unsigned char * [numShorterRSBlocks];//...
for(k=0;k<numShorterRSBlocks;k++)
{
shorterRSBlocks[k] = new unsigned char [lengthShorterRSBlock];
memset(shorterRSBlocks[k], 0, lengthShorterRSBlock);
}//int[][] shorterRSBlocks = new int[numShorterRSBlocks][lengthShorterRSBlock];
unsigned char ** longerRSBlocks = new unsigned char * [numLongerRSBlocks];//...
for(k=0;k<numLongerRSBlocks;k++)
{
longerRSBlocks[k] = new unsigned char [lengthLongerRSBlock];
memset(longerRSBlocks[k], 0, lengthLongerRSBlock);
}//int[][] longerRSBlocks = new int[numLongerRSBlocks][lengthLongerRSBlock];
for (int i = 0; i < ncBlockSum; i++)
{
if (i < numShorterRSBlocks)
{ //get shorter RS Block(s)
int mod = 0;
for (int j = 0; j < lengthShorterRSBlock; j++)
{
if (j == lengthShorterRSBlock - eccPerRSBlock)
mod = numLongerRSBlocks;
shorterRSBlocks[i][j] = m_byAllCodeWord[j * ncBlockSum + i + mod];
}
//canvas.println("eccPerRSBlock(shorter)=" + eccPerRSBlock );
RsDecode corrector = RsDecode(eccPerRSBlock / 2);
int ret = corrector.decode(shorterRSBlocks[i],lengthShorterRSBlock);
if (ret > 0)
numSucceededCorrections += ret;
else if (ret < 0)
numCorrectionFailures++;
}
else
{ //get longer RS Blocks
int mod = 0;
for (int j = 0; j < lengthLongerRSBlock; j++)
{
if (j == lengthShorterRSBlock - eccPerRSBlock)
mod = numShorterRSBlocks;
longerRSBlocks[i - numShorterRSBlocks][j] = m_byAllCodeWord[j * ncBlockSum + i - mod];
}
//canvas.println("eccPerRSBlock(longer)=" + eccPerRSBlock );
RsDecode corrector = RsDecode(eccPerRSBlock / 2);
int ret = corrector.decode(longerRSBlocks[i-numShorterRSBlocks],lengthLongerRSBlock);
if (ret > 0)
numSucceededCorrections += ret;
else if (ret < 0)
numCorrectionFailures++;
}
}
int p = 0;
for (int i = 0; i < ncBlockSum; i++)
{
if (i < numShorterRSBlocks)
{
for (int j = 0; j < lengthShorterRSBlock - eccPerRSBlock; j++)
{
dataBlocks[p++] = shorterRSBlocks[i][j];
}
}
else
{
for (int j = 0; j < lengthLongerRSBlock - eccPerRSBlock; j++)
{
dataBlocks[p++] = longerRSBlocks[i - numShorterRSBlocks][j];
}
}
}
}
/*if (numSucceededCorrections > 0)
{
char s[10];
itoa(numSucceededCorrections,s,10);
AfxMessageBox(s);//" data errors corrected successfully."numSucceededCorrections
}
else
AfxMessageBox("No errors found.");*/
for(i=0;i<m_ncDataCodeWord;i++)
m_byDataCodeWord[i]=dataBlocks[i];
}
}
