pub fn ff_simple_idct48_int16_8bit(block: &mut [i16; 64], col0: usize)Expand description
Transform one 4x8 coefficient half in place without adding it to a pixel
destination. This is the transform portion of FFmpeg’s
ff_simple_idct48_add() used by WMV3 Simple/Main when RES_FASTTX=0.
col0 is 0 for the left half and 4 for the right half.