So that our perfectionist translators get a chance to reach 100% before
we release

(It probably should have been called AquireLock then)

The p_dest object is indeed locked by the calling method (cf mediacontrol_snapshot in src/control/mediacontrol_audio_video.c).

This reverts commit ebbde26e.

It was always set equal to the input's i_bitspersample, which caused
crashes in some transcoding sessions.

Unfortunately taglib does not accept fd's or FILE*, so i ported the code from src/text/unicode.c open() to here.