avfilter/scale: add function to check expressions
authorGyan Doshi <ffmpeg@gyani.pro>
Tue, 31 Dec 2019 11:45:01 +0000 (17:15 +0530)
committerGyan Doshi <ffmpeg@gyani.pro>
Wed, 15 Jan 2020 05:56:49 +0000 (11:26 +0530)
commitce2cfa67aa26e70717eb8b184f232b9c41b81001
treec22a784ae2443a5c72437ac20c2011f8b7b4630d
parent6310fbd543f0c61b258d3993f28286eb0360ff87
avfilter/scale: add function to check expressions

Allows finer identification and logging of invalid expressions and use
of a single list for symbols and their index for both scale and
scale2ref.
libavfilter/vf_scale.c