vf_hwmap: Add device derivation
authorMark Thompson <sw@jkqxz.net>
Sat, 4 Mar 2017 23:57:41 +0000 (23:57 +0000)
committerMark Thompson <sw@jkqxz.net>
Wed, 14 Jun 2017 21:27:34 +0000 (22:27 +0100)
commitb2ef1f42badd1c5731816a3959b6dbb62187dbcc
tree074ec69284aac2752fc398aba402085400be2572
parentd59c6a3aebc20cc64cb7a46401cb55f02f4cbe09
vf_hwmap: Add device derivation

Also refactor a little and improve error messages to make failure
cases easier to understand.

(cherry picked from commit 38cb05f1c89cae1862b360d4e7e3f0cd2b5bbb67)
libavfilter/vf_hwmap.c