[FFmpeg-devel] [PATCH][RFC]lavu/mem: Do not realloc in av_fast_alloc() if size == min_size

Carl Eugen Hoyos ceffmpeg at gmail.com
Sat Dec 30 15:44:54 EET 2017


FFmpeg has an arbitrary allocation limit (2G iirc), av_fast_realloc()
increases the allocation even if the requested is equal the already
allocated size. I believe this can lead to unnecessary OOM (no
testcase) if the requested (and already allocated) size is close to
our limit.
Additionally, this avoids an over-allocation for the mov stts patch I just sent.
Attached patch changes the behaviour introduced 15 years ago.

Please comment, Carl Eugen
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