Dequantize and transform with level shift
SSE2
| FwStatus | fwiDCTQuantInv8x8LS_JPEG_16s8u_C1R | ( | const Fw16s * pSrc, Fw8u * pDst, int dstStep, const Fw16u * pQuantInvTable ); |
| dstStep | Destination buffer step size (width of the buffer in bytes). | |
| pDst | Pointer to a location in a destination buffer. | |
| pQuantInvTable | Pointer to the inverse quantization table (decoder). | |
| pSrc | Pointer to a location in a source buffer. |
This function reads a block of uncompressed image data in a source buffer, performs dequantization and inverse DCT, level-shifts the signed values to unsigned values, then writes an 8X8 data block to a destination buffer.