Andreas Rheinhardt 16bb8247b4 avcodec/mpegaudiodsp: Make initializing synth windows thread-safe ...

These arrays are used by the Musepack decoders, the MPEG audio decoders
as well as qdm2 and up until now, these arrays might be initialized more
than once, leading to potential data races as well as unnecessary
initializations. Therefore this commit ensures that each array will only
be initialized once.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

2020-11-24 11:35:03 +01:00

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