[vlc-devel] [RFC PATCH 17/17] spdif: set "spdif" option true by default

Rémi Denis-Courmont remi at remlab.net
Wed Jul 27 10:23:13 CEST 2016

Le 2016-07-25 18:58, Jean-Baptiste Kempf a écrit :
> On 25 Jul, Rémi Denis-Courmont wrote :
>> What prevents S/PDIF by default on unmanaged audio outputs, such as 
>> ALSA?
> Don't they need their own option?


Some outputs cannnot "negotiate" S/PDIF support. They just take it as 
if it were a signed 16-bits PCM stream, and assume that the wiring is 
accordingly. ALSA is among them. Those outputs need a 
disabled-by-default option.

Other outputs negotiate S/PDIF at the API level, with either the link 
layer (e.g. HDMI) or OS configuration as back-end. They need either no 
option or a mostly redundant enabled-by-default option. WASAPI, 
PulseAudio come to mind.

And the remaining ones just don't support S/PDIF at all.

So I think the notion of a global decoder-level option is doomed, since 
there would be contradictory requirements for the default value.

Rémi Denis-Courmont

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