Scale a rectangle of pixels in src with src_stride to dest with dest_stride using the horizontal scaler hscaler and the vertical scaler vscale.
For a given pixel at out_offset, get the first required input pixel at in_offset and the n_taps filter coefficients.
Get the maximum number of taps for scale.
Horizontally scale the pixels in src to dest, starting from dest_offset for width samples.
#GstVideoScaler is a utility object for rescaling and resampling video frames using various interpolation / sampling methods.