[Webkit-unassigned] [Bug 230553] Playing back MediaElementAudioSources with loop: true do not loop seamlessly

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=230553

--- Comment #4 from Chris Dumez <cdumez at apple.com> ---
(In reply to jujjyl from comment #3)
> Actually now I realize there is a better test case for the bug in my suite. 
> 
> Better STR:
> 
> 1. Visit
> http://clb.confined.space/audio_test_suite/car_acceleration_high/
> car_acceleration_high.html
> 2. Click the first compressed playback button:
> "car_acceleration_high_44100hz_706kbs_mono_int16.wav"
> 
> that showcases the distinct pause between loops.
> 
> Made a video to showcase the issue:
> 
> http://clb.confined.space/bugs/Safari_looping_compressed_audio_bug.mkv
> 
> The gap between the loops was tested to occur on the following setups:
> 
> MacBook Pro (13-inch, 2016, Four Thunderbolt 3 Ports)
>  - macOS Catalina 10.15.6 (19G2021)
>  - STP Release 122 (Safari 14.2, WebKit 15612.1.6.2)
> 
> MacBook Pro (13-inch, 2016, Four Thunderbolt 3 Ports) (same from above)
>  - macOS Catalina 10.15.6 (19G2021)
>  - Safari 14.0 (15610.1.28.1.9, 15610)
> 
> 
> Mac mini (2018)
>  - macOS Big Sur 11.6 (20G165)
>  - Safari 14.1.2 (16611.3.10.1.6)
> 
> Mac mini (2018) (same from above)
>  - macOS Big Sur 11.6 (20G165)
>  - STP Release 132 (Safari 15.4, WebKit 16613.1.1.5)

I clicked on the first button. It played through once (without hiccup) but it didn't loop.
I tried the same thing in Chrome and the behavior was exactly the same.

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