cv::Mat uncompressData(const unsigned char * bytes, unsigned long size)
{
cv::Mat data;
if(bytes && size>=3*sizeof(int))
{
//last 3 int elements are matrix size and type
int height = *((int*)&bytes[size-3*sizeof(int)]);
int width = *((int*)&bytes[size-2*sizeof(int)]);
int type = *((int*)&bytes[size-1*sizeof(int)]);
data = cv::Mat(height, width, type);
uLongf totalUncompressed = uLongf(data.total())*uLongf(data.elemSize());
int errCode = uncompress(
(Bytef*)data.data,
&totalUncompressed,
(const Bytef*)bytes,
uLong(size));
if(errCode == Z_MEM_ERROR)
{
UERROR("Z_MEM_ERROR : Insufficient memory.");
}
else if(errCode == Z_BUF_ERROR)
{
UERROR("Z_BUF_ERROR : The buffer dest was not large enough to hold the uncompressed data.");
}
else if(errCode == Z_DATA_ERROR)
{
UERROR("Z_DATA_ERROR : The compressed data (referenced by source) was corrupted.");
}
}
return data;
}
cv::Mat uncompressData(const unsigned char * bytes, unsigned long size)
{
cv::Mat data;
if(bytes && size>=3*sizeof(int))
{
//last 3 int elements are matrix size and type
int height = *((int*)&bytes[size-3*sizeof(int)]);
int width = *((int*)&bytes[size-2*sizeof(int)]);
int type = *((int*)&bytes[size-1*sizeof(int)]);
// If the size is higher, it may be a wrong data format.
UASSERT_MSG(height>=0 && height<10000 &&
width>=0 && width<10000,
uFormat("size=%d, height=%d width=%d type=%d", size, height, width, type).c_str());
data = cv::Mat(height, width, type);
uLongf totalUncompressed = uLongf(data.total())*uLongf(data.elemSize());
int errCode = uncompress(
(Bytef*)data.data,
&totalUncompressed,
(const Bytef*)bytes,
uLong(size));
if(errCode == Z_MEM_ERROR)
{
UERROR("Z_MEM_ERROR : Insufficient memory.");
}
else if(errCode == Z_BUF_ERROR)
{
UERROR("Z_BUF_ERROR : The buffer dest was not large enough to hold the uncompressed data.");
}
else if(errCode == Z_DATA_ERROR)
{
UERROR("Z_DATA_ERROR : The compressed data (referenced by source) was corrupted.");
}
}
return data;
}
