[Bug 680779] No well-defined semantics for 100% volume on playbin2 - leaky abstraction

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=680779

Sebastian Dröge (slomo) <slomo at coaxion.net> changed:

           What    |Removed                     |Added
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             Status|NEW                         |NEEDINFO
                 CC|                            |slomo at coaxion.net

--- Comment #3 from Sebastian Dröge (slomo) <slomo at coaxion.net> ---
I would consider this as NOTABUG for GStreamer. The semantics are well defined
in playbin: 100% (==1.0) means that the samples we send to the sink are not
scaled, 0.5 means every sample is scaled by 0.5, 2.0 means it's scaled by 2.0.
That is 100% is whatever the default of the sound system is, 0.5 is -6dB and
2.0 is +6dB. (dB = 20 * log_10(linear_scale))


It might be that pulsesink implements the GstStreamVolume interface wrong
though, it should do exactly what I described above with PulseAudio API.

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