Fix audio/video desync caused by floating point cumulative errors

[Stypox]

What is it?

• Bug fix (user facing)
• Feature (user facing)
• Code base improvement (dev facing)
• Meta improvement to the project (dev facing)

Description of the changes in your PR

After doing a git bisect I found out which commit caused the desync to appear: 3855e48
The problem was that the value of playback speed, even though displayed as 1.0x, was instead 1.00267911. This was probably caused by cumulative floating point errors after saving and restoring the value many times from shared preferences. This PR rounds speed and pitch to 2 decimal places before saving them or feeding them to the player, so that any floating point error is eliminated and the issue is not there anymore.

Fixes the following issue(s)

• fixes Audio/Video desync #3550

Testing apk

The reason as to why having a playback speed very near 1.0 caused desync is still unknown to me, but I tested this PR with the settings provided at #3550 (comment) and the issue is not there anymore (I am sure it was there before with the same setup).
@LukasThyWalls @juantxorena @ajtpak @mgolden356 @Godecki @macearl @vadiof @loque036 @B0pol @coolsan06 @theScrabi could you test this apk and confirm it fixes the issue?
app-debug.zip

Agreement

• I carefully read the contribution guidelines and agree to them.

[mgolden356]

This works on my end so far, after a ten minute video. Due to the nature of the variability of when I get desyncs, I may be updating this in the future. Thank you! This was my number one pressing concern with NewPipe.

Works so far after a 2 hour video at 1x speed at 720p. That's pretty good by any stretch of the imagination. Will comment further.

This makes a lot of sense. I always export and import my data and settings. And this must be why at first the desync takes a while to show up, but then it starts being there all the time/constant. The 1.01x, the not importing settings, everything.

If it's relevant I have a Moto g7 power Android 9 latest security.

[theScrabi]

Yop works like a charm on my aquaris X lineage 16.1

[coolsan06]

It works really well with Android 9 in a v30.