Slow seeking with large MP3 files #900
NworbLegin
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Hi miniaudio users,
I'm currently coding playback of mp3 files for a cross-platform app (windows, iOS, Android) and I was hitting some really large delays seeking to a playback point. Our audiobook mp3 files are >45 mins, and the seek times in debug builds were really slowing down our development. (Seek times in a release build were also a little slow too - expecially on lower-end mobile devices).
It looks like this slowdown is caused by miniaudio attempting to seek through the mp3 file dynamically at run-time in a fairly inefficient fall-back process.
One thing that doesn't seem to be documented that seems to help with this is to specify a value for the
ma_decoder_configthat is passed intoma_decoder_init_file.As far as I can tell this will create the specified number of seek points when the file is initialised. These seek points are then used as pre-generated indexes to speed up the seeking at run-time.
Maybe this should be documented somewhere. (Or maybe it is and I've missed it!)
I hope this helps someone.
Cheers
Nigella
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