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Fix a few editorial aspects #46

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Sep 23, 2020
Merged

Fix a few editorial aspects #46

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3ece5d9
Fix a few editorial aspects
dontcallmedom Sep 1, 2020
9757b3c
Fix typo in property name and improve bikeshed markup
dontcallmedom Sep 1, 2020
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40 changes: 12 additions & 28 deletions index.bs
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Expand Up @@ -4,30 +4,14 @@ Shortname: webrtc-media-streams
Level: None
Status: ED
Group: webrtc
Repository: w3c/webrtc-insertable-streams/
Repository: w3c/webrtc-insertable-streams
URL: https://w3c.github.io/webrtc-insertable-streams/
Editor: Harald Alvestrand, Google https://google.com, hta@google.com
Editor: Guido Urdaneta, Google https://google.com, guidou@google.com
Abstract: This API defines an API surface for manipulating the bits on
Abstract: MediaStreamTracks being sent via an RTCPeerConnection.
Abstract: {{MediaStreamTrack}}s being sent via an {{RTCPeerConnection}}.
Markup Shorthands: css no, markdown yes
</pre>
<pre class='anchors'>
spec: WEBRTC; urlPrefix: https://w3c.github.io/webrtc-pc/
type: interface
text: RTCPeerConnection; url: #dom-rtcpeerconnection
type: dictionary
text: RTCConfiguration; url: #dom-rtcconfiguration
spec: WEB-CODECS; urlPrefix: https://github.com/WICG/web-codecs/
type: interface
text: AudioEncoder; url: #dom-audioencoder
type: interface
text: AudioDecoder; url: #dom-audiodecoder
type: interface
text: VideoEncoder; url: #dom-videoencoder
type: interface
text: VideoDecoder; url: #dom-videodecoder
</pre>
<pre class=biblio>
{
"WEB-CODECS": {
Expand Down Expand Up @@ -151,27 +135,27 @@ argument, ensure that the codec is disabled and produces no output.
### Stream creation ### {#stream-creation}

Let the {{RTCRtpSender}} or {{RTCRtpReceiver}} have an internal slot,
[[\Streams]], initialized to null.
`[[Streams]]`, initialized to null.

When {{RTCRtpSender/createEncodedStreams}}() is
called, run the following steps:

* If the {{RTCPeerConnection}}'s configuration does not have {{RTCConfiguration/encodedInsertableStreams}} set to "true", throw an {{InvalidStateError}} and abort these steps.
* If the data source does not permit access, throw an {{InvalidAccessError}} and abort these steps.
* If [[\Streams]] is not null, throw an {{InvalidStateError}}.
* Create an {{RTCInsertableStreams}} object 's'.
* Set s.readable to a ReadableStream representing the encoded data source.
* Set s.writable to a WritableStream representing the encoded data sink.
* If `[[Streams]]` is not null, throw an {{InvalidStateError}}.
* Create an {{RTCInsertableStreams}} object |s|.
* Set |s|.{{RTCInsertableStreams/readable}} to a {{ReadableStream}} representing the encoded data source.
* Set |s|.{{RTCInsertableStreams/writable}} to a {{WritableStream}} representing the encoded data sink.
* Enable the encoded data source.
* Store 's' in the internal slot [[\Streams]].
* Return 's'
* Store |s| in the internal slot `[[Streams]]`.
* Return |s|

### Stream processing ### {#stream-processing}

When a frame is produced from the encoded data source, place it on the
[[\Streams]].readableStream'.
`[[Streams]]`.{{RTCInsertableStreams/readable}}.

When a frame appears on the [[\Streams]].writable, do the following:
When a frame appears on the `[[Streams]]`.{{RTCInsertableStreams/writable}}, do the following:
* Check that the frame is a a valid frame that has been created by the encoded data source; if it is not, discard it. A processor cannot create frames, or move frames between streams.
* Check that the frame's {{RTCEncodedVideoFrame/timestamp}} is equal to or larger than any previously received frame. A processor cannot reorder frames, although it may delay them or drop them.
* Process the frame as if it came directly from the encoded data source.
Expand All @@ -191,6 +175,6 @@ otherwise unavailable, which allows some fingerprinting surface.

# Examples # {#examples}

See the explainer document.
See the [explainer document](https://github.com/w3c/webrtc-insertable-streams/blob/master/explainer.md#code-examples).


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