Intel® Software Network

Hi everyone,

I am trying to encode image data from a managed byte array (.Net) via the UIC Samples / the "image" classes from the sample applications (picnic and transcoder).

I thought about this:

// execution status
ExcStatus res, resOut;

// image class --> after reading the raw data this holds the image information
// image is param to 2. encoding step
CIppImage img;

// Parameter for the raw data reading step
PARAMS_RAW param;

// buffer in which the raw bytes are copied:(
Ipp8u* buf;

int len = imageData->Length;

// 1. put data in CMemBuffInput (unmanaged code)
CMemBuffInput cmi;

buf = (Ipp8u*)ippMalloc(len);

// use pinpointer to prevent data from being garbage collected
pin_ptr<Byte> p = &imageData[0];

cmi.Open(p,len);

//set raw params
param.height = height;
param.width = width;
param.nchannels = 3;
param.precision = 8;
param.offset = 0;
param.color = JC_RGB;

// 2. use Raw::ReadImageRaw(
res = ReadImageRAW(cmi, param, img);

bool rawSuccess = IsOk(res);

img.Color(JC_RGB);

// 4. define output stream
CMemBuffOutput mo;
Ipp8u* bufOut;

bufOut = (Ipp8u*)ippMalloc(len);
mo.Open(bufOut, len);

resOut = SaveImageRAW(img, param, mo);

bool rawWriteSuccess = IsOk(resOut);

PARAMS_BMP params_bmp;

resOut = SaveImageBMP(img, params_bmp, mo);

bool bmpWriteSuccess = IsOk(resOut);

Question: Is this the way the UIC usage is intended? Unfortunately, the Saving as BMP returns no error code but crashes with Visual Studio complaining about a corrupted Heap with this message:

HEAP[appname.exe]: Invalid Address specified to RtlFreeHeap( 00170000,
10015988 )
Windows has triggered a breakpoint in appname.exe.

This may be due to a corruption of the heap, and indicates a bug in
appname.exe or any of the DLLs it has loaded.


Any hint on how to solve this problem or to tackle my encoding task would be highly appreciated,

Many thanks in advance and kind regards,

Norman