[FFmpeg-devel] [PATCH] Reduce usage of strcmp when setting default options

Edward Hervey bilboed
Mon Nov 2 21:12:34 CET 2009

Hi all,

 While doing some profiling, I noticed that av_opt_set_defaults2 would
end up doing a rather big number of strcmp calls.

 The problem was that av_opt_set_defaults2 would, for each AVOption:
 * call av_set_* ... with the name of the option as the argument
 * av_set_* would... search for the AVOption based on the name.

 The following patch creates some variants of the existing av_set_*
functions that take an AVOption directly instead of the name of an

 The new functions are static and not exposed, if some people want them
to be public, I can add that.

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