Downsample row (H2V1)
| FwStatus | fwiSampleDownRowH2V1_Box_JPEG_8u_C1 | ( | const Fw8u * pSrc, int srcWidth, Fw8u * pDst ); |
| pDst | Pointer to a location in a destination buffer. | |
| pSrc | Pointer to a location in a source buffer. | |
| srcWidth | Width of the source row in pixels. |
This function steps through a row of pixel data in a source buffer, performs 2:1 horizontal and 1:1 vertical (4:2:2) chrominance downsampling without smoothing, and writes the output data to a destination buffer.
Row ends are defined by the two source pointers. Ordered dither rounding is used (0.5 is rounded up or down at alternate pixel locations).