Forums - Wrong result when using the fastCV haar transformation function

Hi I try to do the haar wavelet transformation with my Y channel image data(a single plane image), I use the function fcvDWTHaaru8(ySrc,yWidth,yHeight,yStride,yDst,yWidth*sizeof(int16_t));

here ySrc is the pointer to my Y buffer and the data type is unit8*;

yWidth,yHeight,yStride is my image width,height and stride, yWidth = 4160, yheight = 3120 and yStride = 4160;

I apply a new buffer to store my transfromed result, int16_t* yDst = (int16_t*) malloc(yBuffersize*sizeof(int16_t)), yBuffersize is the size of  Y image buffer;

for the last param, I follow the instruction from this function, it should be the "srcWidth * sizeof(int16_t)"  (yWidth*sizeof(int16_t));

but when I dump the result from my mobile phone and use the YUV viewer software to check it (I  just do 1 level decomposition),

(LL,LH,HL,HH) the LH,HL,HH parts look OK, but there is no image info for the LL part, this LL part is all black in the YUV viewer,

I do not know how to figure out this problem, if anyone can help me? thanks