avcodec/shorten: Move buffer allocation and offset init to end of read_header()
authorMichael Niedermayer <michael@niedermayer.cc>
Sun, 10 Sep 2017 19:10:16 +0000 (21:10 +0200)
committerMichael Niedermayer <michael@niedermayer.cc>
Sun, 17 Sep 2017 13:57:27 +0000 (15:57 +0200)
commit19045efd0573b1c54d10db04c7f5426a2741bf14
tree0c0dd6e3fb868f9390ecb0c01c5029500c8bbb29
parent33e67eb80cf2d67198828f9430815ef319ffae6e
avcodec/shorten: Move buffer allocation and offset init to end of read_header()

They are time consuming operations, performing them after the other checks
improves the speed with damaged input dramatically.

Fixes: Timeout
Fixes: 2928/clusterfuzz-testcase-4992812120539136

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 380659604f2692b625928a3a76a1c046f473c9f6)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/shorten.c