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.
One or both of hscale and vscale can be NULL to only perform scaling in
one dimension or do a copy without scaling.
x and y are the coordinates in the destination image to process.
a vertical #GstVideoScaler
a #GstVideoFormat for srcs and dest
source pixels
source pixels stride
destination pixels
destination pixels stride
the horizontal destination offset
the vertical destination offset
the number of output pixels to scale
the number of output lines to scale
Free a previously allocated #GstVideoScaler scale.
For a given pixel at out_offset, get the first required input pixel at
in_offset and the n_taps filter coefficients.
Note that for interlaced content, in_offset needs to be incremented with
2 to get the next input line.
an output offset
Get the maximum number of taps for scale.
Horizontally scale the pixels in src to dest, starting from dest_offset
for width samples.
a #GstVideoFormat for src and dest
source pixels
destination pixels
the horizontal destination offset
the number of pixels to scale
Vertically combine width pixels in the lines in src_lines to dest.
dest is the location of the target line at dest_offset and
srcs are the input lines for dest_offset.
a #GstVideoFormat for srcs and dest
source pixels lines
destination pixels
the vertical destination offset
the number of pixels to scale
#GstVideoScaler is a utility object for rescaling and resampling video frames using various interpolation / sampling methods.