[pulseaudio-discuss] [PATCH] sink-input: Relax initial volume setting restrictions

Arun Raghavan arun.raghavan at collabora.co.uk
Thu May 10 22:23:48 PDT 2012

On Wed, 2012-05-09 at 20:43 +0530, Arun Raghavan wrote:
> [I don't expect major objections to this, but since we're in the midst of a
> freeze, playing it safe]
> The extended stream creation API introduced subtle breakage at the time
> of sink input creation. The sample spec (and thus channel count) is no
> longer guaranteed to be available during the PA_SINK_INPUT_NEW hook
> (since multiple formats may be specified and a single format might only
> be fixed after all hooks are called).
> To deal with this, instead of asserting on mismatched channel maps in
> whatever volume is set by a hook, we remap the set volume to the desired
> number of channels.
> ---

Turns out this is all a big lie. The volume setting happens in the
fixate hook. I'm going to leave this out for now. I think in the long
term we'll need to have a cleaner and better-documented explanation of
what happens in what hook for module-writers, but for now, things work

-- Arun

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