[FFmpeg-devel] [PATCH] Use ff_thread_once() to initialize sin/cos static tables.

[Derek Buitenhuis]

On 10/25/2015 11:44 AM, Michael Niedermayer wrote:
>> One could argue this is not a representative sample. It's a single small file,
>> which must always init (as opposed to a longer running process such as Chrome.
>> Whereas if you have a longer sample, it wouldn't even be within the margin of
>> error, I bet.
> 
> If the usecase is to probe many files, then file duration would not
> help hideing the init time. (to fill a GUI list or whatever)

I reject this notion. You are completely discounting that people use
libavcodec *as a library*, and not via CLI.

> Also startup time for normal playback itself does matter, as its
> part of user vissible responsiveness, the user clicks play in his
> players playlist and if that isnt instantaneaously starting playback
> the user notices. So IMO startup time is not irrelevant

I agree, but neither is thread-safety. Perhaps there is a middle ground.

- Derek