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Add spatialScalability to VideoConfiguration #189

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merged 4 commits into from
Apr 5, 2022
Merged

Add spatialScalability to VideoConfiguration #189

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67794ca
Add spatialScalability to VideoConfiguration
drkron Jan 17, 2022
25e1288
Fix duplicate definition
drkron Jan 17, 2022
73b1fc4
Review comments
drkron Jan 25, 2022
ee9acf7
Clarify default mode for scalabilityMode
drkron Feb 8, 2022
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18 changes: 17 additions & 1 deletion index.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -380,6 +380,7 @@ spec: secure-contexts; urlPrefix: https://www.w3.org/TR/secure-contexts/
ColorGamut colorGamut;
TransferFunction transferFunction;
DOMString scalabilityMode;
boolean spatialScalability;
};
</pre>

Expand Down Expand Up @@ -475,9 +476,24 @@ spec: secure-contexts; urlPrefix: https://www.w3.org/TR/secure-contexts/

<p>
If present, the <dfn for='VideoConfiguration' dict-member>scalabilityMode</dfn>
member represents the scalability mode as defined in [[webrtc-svc]].
member represents the scalability mode as defined in [[webrtc-svc]]. If
absent, the implementer defined default mode for this {{contentType}} is
assumed (i.e., the mode you get if you don't specify one via
{{RTCRtpSender/setParameters()}}). scalabilityMode is only applicable
to the {{MediaEncodingType}} {{MediaEncodingType/webrtc}}.
</p>

<p>
If present, the <dfn for='VideoConfiguration' dict-member>spatialScalability</dfn>
member represents the ability to do spatial prediction, that is,
using frames of a resolution different than the current resolution as
dependencies. If absent, spatialScalability will default to
<code>false</code>. spatialScalability is closely coupled to
{{scalabilityMode}} in the sense that streams encoded with modes using
spatial scalability (e.g. "L2T1") can only be decoded if
spatialScalability is supported. spatialScalability is only applicable
to {{MediaDecodingConfiguration}}.
</p>
</section>

<section>
Expand Down