[vlc-devel] [PATCH] mmdevice: use IAudioStreamVolume to change volume
thomas at gllm.fr
Mon Apr 9 13:18:31 CEST 2018
On Mon, Apr 9, 2018, at 12:37, Rémi Denis-Courmont wrote:
> Le 9 avril 2018 11:23:01 GMT+03:00, Jean-Baptiste Kempf
> <jb at videolan.org> a écrit :
> >On Mon, 9 Apr 2018, at 10:13, Rémi Denis-Courmont wrote:
> >> We of course already considered that. It obviously leads to
> >> basically all the time on properly mixed streams.
> >As most of the output are in float, are you sure about that?
> >Jean-Baptiste Kempf - President
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> Oh I am sure it will work by accident for some cases and fail miserably
> in others. I don't know all the WASAPI backends and filters. As it is a
> plugable system, nobody knows.
> The only thing I know for sure is that:
> - it will utterly fail when integer format is used,
Indeed. We could force FL32 output for integers inputs but I'm afraid of possible precision loss (specially for S24/S32).
> - audio will eventually be integer, as DACs cannot do float.
Yes but this won't change anything, the float -> integer conversion will be done at the end after processing all filters, no ?
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