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Allow for overriding reasons tracks stay muted #335

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Allow for overriding reasons tracks stay muted #335

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26 changes: 19 additions & 7 deletions index.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -946,13 +946,13 @@ interface MediaSession {
<a>In parallel</a>, run the following steps:
<ol>
<li>
Let <var>applyPausePolicy</var> be <code>true</code> if the user agent
Let <var>implementPausePolicy</var> be <code>true</code> if the user agent
implements a policy of <dfn>pausing all input sources</dfn> of type
<var>captureKind</var> in response to UI and <code>false</code>
otherwise.
</li>
<li>
If <var>applyPausePolicy</var> is <code>true</code>, run the following
If <var>implementPausePolicy</var> is <code>true</code>, run the following
substeps:
<ol>
<li>
Expand Down Expand Up @@ -983,18 +983,30 @@ interface MediaSession {
</li>
<li>Resolve <var>p</var> with <code>undefined</code>.</li>
<li>
If <var>applyPausePolicy</var> is <code>true</code>, run the following
If <var>implementPausePolicy</var> is <code>true</code>, run the following
substeps:
<ol>
<li>
Let <var>newMutedState</var> be <code>true</code> if
<var>active</var> is
<code>false</code> and <code>false</code> otherwise.</li>
<li>
For each {{MediaStreamTrack}} whose source is of type
<var>captureKind</var>,
<a>queue a task</a> to [$set a track's muted state$] to
<var>newMutedState</var>.
For each {{MediaStreamTrack}} <var>track</var> whose source
is of type <var>captureKind</var>, <a>queue a task</a> to run
the following substep:
<ol>
<li>
Provided <var>track</var> is not [=MediaStreamTrack/muted=]
by the user agent for reasons that override its [=pausing all
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In this case, we might be again in capture state UI out of sync with the device mute state.
It seems to me that, in the usual case of capturing with only one device, UA should instead deny the request.

It is really only when there are multiple capture devices that is fine to do what you are suggesting (In that case the capture state UI will also be in sync since at least one device will restart capture).

It seems a note for implementors stating the reasons to override and/or deny might be helpful.

input sources | pausing policy=],
[$set a track's muted state | set the muted state$] of
<var>track</var> to <var>newMutedState</var>.
</li>
<p class=note>
Overriding reasons might include a physical mute button on
the device.
</p>
</ol>
</li>
</ol>
</li>
Expand Down
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