libavfilter/scale: Populate ow/oh when using 0 as w/h
The input width and height is known at parse time so there's no reason ow/oh should not be usable when using 0 as the width or height expression. Previously in "scale=0:ow" ow would be set to "0" which works, conveniently, as "scale=0:0" is perfectly valid input but this breaks down when you do something like "scale=0:ow/4" which one could reasonably expect to work as well, but does not as ow is 0 not the real value. This change handles the 0 case for w/h immediately so the ow/oh variables work as expected. Consequently, the rest of the code does not need to handle 0 input. w/h will always be > 0 or < 0. The second explicit (int) cast ensures that ow/oh appear as integers as a user might expect when dealing with pixel dimensions. Signed-off-by:Kevin Mark <kmark937@gmail.com> Signed-off-by:
Ronald S. Bultje <rsbultje@gmail.com>
Showing
Please register or sign in to comment