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Move creation of MST after device selection. #833

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Dec 9, 2021
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Move creation of MST after device selection. #833

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19a1df8
Move creation of MST after device selection.
jan-ivar Dec 2, 2021
a3dcd97
Update getusermedia.html
jan-ivar Dec 9, 2021
05974c5
Update getusermedia.html
jan-ivar Dec 9, 2021
6bb4555
Update getusermedia.html
jan-ivar Dec 9, 2021
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39 changes: 24 additions & 15 deletions getusermedia.html
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Expand Up @@ -3523,11 +3523,12 @@ <h2>Methods</h2>
<var>requestedMediaTypes</var>, run the following steps:</p>
<ol>
<li>
<p>For each possible <var>source</var> for
media of type <var>kind</var>,
[=create a MediaStreamTrack=] with <var>source</var>
and the value <code>false</code>.</p>
<p>Call this set of tracks the
<p>For each possible configuration of each possible
source device of media of type <var>kind</var>, conceive a
<dfn>candidate</dfn> as a placeholder for an eventual
{{MediaStreamTrack}} configured with a <a>settings
dictionary</a> comprised of its specific settings.</p>
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<p>Call this set of candidates the
<var>candidateSet</var>.</p>
<p>If <var>candidateSet</var> is the empty set,
[= reject =] <var>p</var> with a new
Expand All @@ -3554,9 +3555,9 @@ <h2>Methods</h2>
these steps.</p></li>
<li>
<p>Run the <a>SelectSettings</a> algorithm on each
track in <var>candidateSet</var> with <var>CS</var>
candidate in <var>candidateSet</var> with <var>CS</var>
as the constraint set. If the algorithm returns
<code>undefined</code>, remove the track from
<code>undefined</code>, remove the candidate from
<var>candidateSet</var>. This eliminates devices
unable to satisfy the constraints, by verifying that
at least one settings dictionary exists that
Expand All @@ -3580,7 +3581,7 @@ <h2>Methods</h2>
candidate devices in <var>candidateSet</var> that are
not attached to a live {{MediaStreamTrack}}
in the current browsing context. Remove from
<var>candidateSet</var> any device for which the
<var>candidateSet</var> any candidate whose device's
permission state is {{PermissionState/"denied"}}.</p>
<p>If <var>candidateSet</var> is now empty,
indicating that all devices of this type are in state
Expand All @@ -3594,7 +3595,7 @@ <h2>Methods</h2>
Failure</em> below.</p>
</li>
<li>
<p>Add all tracks from <var>candidateSet</var> to
<p>Add all candidates from <var>candidateSet</var> to
<var>finalSet</var>.</p>
</li>
</ol>
Expand Down Expand Up @@ -3633,13 +3634,12 @@ <h2>Methods</h2>
MUST disclose whether permission will be granted only to
the device chosen, or to all devices of that
<var>kind</var>.</p>
<p>Let <var>track</var> be the provided media, which
MUST be precisely one track of type <var>kind</var> from
<var>finalSet</var>. The decision of which track to
<p>Let <var>finalCandidate</var> be the provided media, which
MUST be precisely one candidate of type <var>kind</var> from
<var>finalSet</var>. The decision of which candidate to
choose from the <var>finalSet</var> is completely up to
the User Agent and may be determined by asking the user.
Once selected, the source of the
{{MediaStreamTrack}} MUST NOT change.</p>
</p>
<p>The User Agent SHOULD use the value of the computed
<a>fitness distance</a> from the <a>SelectSettings</a>
algorithm as an input to the selection algorithm.
Expand Down Expand Up @@ -3677,14 +3677,23 @@ <h2>Methods</h2>
Otherwise, restart these sub steps with the updated <var>finalSet</var>.</p>
</li>
<li>
<p>Using the granted device's deviceId, <var>deviceId</var>, set
<p>Let <var>grantedDevice</var> be
<var>finalCandidate</var>'s source device.</p>
<li>
<p>Using <var>grantedDevice</var>'s deviceId, <var>deviceId</var>, set
{{MediaDevices/[[devicesLiveMap]]}}[<var>deviceId</var>] to
<code>true</code>, if it isn’t already <code>true</code>,
and set the
{{MediaDevices/[[devicesAccessibleMap]]}}[<var>deviceId</var>] to
<code>true</code>, if it isn’t already
<code>true</code>.</p>
</li>
<li>
<p>Let <var>track</var> be the result of
[=create a MediaStreamTrack|creating a MediaStreamTrack=]
with <var>grantedDevice</var> and the value <code>false</code>.
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The source of the {{MediaStreamTrack}} MUST NOT change.</p>
</li>
<li>
<p>Add <var>track</var> to <var>stream</var>'s track set.</p>
</li>
Expand Down