Dequantize data block
SSE2
| FwStatus | fwiQuantInv8x8_JPEG_16s_C1I | ( | Fw16s * pSrcDst, const Fw16u * pQuantInvTable ); |
| pQuantInvTable | Pointer to the inverse quantization table (decoder). | |
| pSrcDst | Pointer to a location in a buffer that contains both the source and destination. |
This function reads a block of uncompressed image data, dequantizes the values, and writes an 8X8 data block of DCT coefficients to the same location.
Dequantization is performed using the following formula.
s[vu] = (sq[vu]*Q[vu])
Because quantization is lossy, some of the data may be saturated and require up-sampling.