Downsample row (H2V1)


FwStatus   fwiSampleDownRowH2V1_Box_JPEG_8u_C1 ( const Fw8u * pSrcint srcWidthFw8u * 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).