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Redefine SendCodecs and ReceiveCodecs #2935

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merged 16 commits into from
Feb 23, 2024
Merged

Redefine SendCodecs and ReceiveCodecs #2935

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9499ffa
Redefine SendCodecs and ReceiveCodecs
alvestrand Feb 6, 2024
acfa8ad
Add 'execute the following steps'
alvestrand Feb 15, 2024
a02178e
Warn about the list being conceptual
alvestrand Feb 18, 2024
0ae0d13
Update webrtc.html
alvestrand Feb 22, 2024
7d73f7e
Update webrtc.html
alvestrand Feb 22, 2024
46fbc87
Link "tuple" concept
alvestrand Feb 23, 2024
fd0ddb7
Update amendments.json
alvestrand Feb 23, 2024
59c796f
Fix commas
alvestrand Feb 23, 2024
988bf42
make setCodecPreferences only look at receive codecs
fippo Nov 28, 2023
0946871
try amendment
fippo Feb 1, 2024
090c77b
Assign id of changed markup more granularly
dontcallmedom Feb 1, 2024
008968a
add test coverage annotation for sdp munging
fippo Jan 18, 2024
7932c68
remove setCodecPreferences note already covered by JSEP
fippo Feb 20, 2024
842ff68
Fix commas
alvestrand Feb 23, 2024
74e2ba4
Merge branch 'main' into redefine-codecs
alvestrand Feb 23, 2024
c2d1b55
Add id of changed section to base recommendation
dontcallmedom Feb 23, 2024
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90 changes: 58 additions & 32 deletions webrtc.html
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Original file line number Diff line number Diff line change
Expand Up @@ -2246,11 +2246,13 @@ <h4>
</li>
<li>
<p>
Set
<var>transceiver</var>.{{RTCRtpTransceiver/[[Receiver]]}}.{{RTCRtpReceiver/[[ReceiveCodecs]]}}
to the codecs that <var>description</var>
negotiates for receiving and which the user
agent is currently prepared to receive.
For each of the codecs that <var>description</var> negotiates for receiving, execute the following steps:
<ol>
<li>Locate the matching codec description in <var>transceiver</var>.{{RTCRtpTransceiver/[[Receiver]]}}.{{RTCRtpReceiver/[[ReceiveCodecs]]}}.</li>
<li>If the matching codec description is not found, abort these steps.</li>
<li>Set the "enabled" flag in the matching codec description to "true".</li>
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</ol>

</p>
<p class='note'>
If the <var>direction</var> is
Expand Down Expand Up @@ -2299,13 +2301,15 @@ <h4>
</li>
<li>
<p>
Set
<var>transceiver</var>.{{RTCRtpTransceiver/[[Sender]]}}.{{RTCRtpSender/[[SendCodecs]]}}
to the codecs that <var>description</var>
negotiates for sending and which the user
agent is currently capable of sending,
and set
<var>transceiver</var>.{{RTCRtpTransceiver/[[Sender]]}}.{{RTCRtpSender/[[LastReturnedParameters]]}}
For each of the codecs that <var>description</var> negotiates for sending, execute the following steps:
<ol>
<li>Locate the matching codec description in <var>transceiver</var>.{{RTCRtpTransceiver/[[Sender]]}}.{{RTCRtpSender/[[SendCodecs]]}}.</li>
<li>If the matching codec description is not found, abort these steps.</li>
<li>Set the "enabled" flag in the matching codec description to "true".</li>
</ol>
</li>
<li>
Set <var>transceiver</var>.{{RTCRtpTransceiver/[[Sender]]}}.{{RTCRtpSender/[[LastReturnedParameters]]}}
to <code>null</code>.
</p>
</li>
Expand Down Expand Up @@ -2573,11 +2577,12 @@ <h4>
</li>
<li>
<p>
Set
<var>transceiver</var>.{{RTCRtpTransceiver/[[Receiver]]}}.{{RTCRtpReceiver/[[ReceiveCodecs]]}}
to the codecs that <var>description</var>
negotiates for receiving and which the user
agent is currently prepared to receive.
For each of the codecs that <var>description</var> negotiates for receiving, execute the following steps:
<ol>
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<li>Locate the matching codec description in <var>transceiver</var>.{{RTCRtpTransceiver/[[Receiver]]}}.{{RTCRtpReceiver/[[ReceiveCodecs]]}}.</li>
<li>If the matching codec description is not found, abort these steps.</li>
<li>Set the "enabled" flag in the matching codec description to "true".</li>
</ol>
</p>
</li>
<li>
Expand All @@ -2590,11 +2595,12 @@ <h4>
<ol>
<li>
<p>
Set
<var>transceiver</var>.{{RTCRtpTransceiver/[[Sender]]}}.{{RTCRtpSender/[[SendCodecs]]}}
to the codecs that <var>description</var>
negotiates for sending and which the user
agent is currently capable of sending.
For each of the codecs that <var>description</var> negotiates for sending, execute the following steps:
<ol>
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<li>Locate the matching codec description in <var>transceiver</var>.{{RTCRtpTransceiver/[[Sender]]}}.{{RTCRtpSender/[[SendCodecs]]}}.</li>
<li>If the matching codec description is not found, abort these steps.</li>
<li>Set the "enabled" flag in the matching codec description to "true".</li>
</ol>
</p>
</li>
<li>
Expand Down Expand Up @@ -3787,8 +3793,7 @@ <h2>
<var>transceiver</var>.{{RTCRtpTransceiver/direction}}
is {{RTCRtpTransceiverDirection/"sendonly"}}
or {{RTCRtpTransceiverDirection/"sendrecv"}},
exclude any codecs not included in the
[=RTCRtpSender/list of implemented send codecs=] for
include all codecs in the <var>transceiver</var>'s {{RTCRtpTransceiver/[[Sender]]}}'s {{RTCRtpSender/[[SendCodecs]]}} for which the "enabled" flag is "true".
<var>kind</var>.
</p>
</li>
Expand All @@ -3798,9 +3803,7 @@ <h2>
<var>transceiver</var>.{{RTCRtpTransceiver/direction}}
is {{RTCRtpTransceiverDirection/"recvonly"}}
or {{RTCRtpTransceiverDirection/"sendrecv"}},
exclude any codecs not included in the
[=list of implemented receive codecs=] for
<var>kind</var>.
include all codecs in the <var>transceiver</var>'s {{RTCRtpTransceiver/[[Receiver]]}}'s {{RTCRtpReceiver/[[ReceiveCodecs]]}} for which the "enabled" flag is "true".
</p>
</li>
</ol>
Expand Down Expand Up @@ -8851,8 +8854,10 @@ <h3>
<li>
<p>
Let <var>sender</var> have a <dfn class="export" data-dfn-for="RTCRtpSender">[[\SendCodecs]]</dfn> internal
slot, representing a list of {{RTCRtpCodecParameters}}
dictionaries, and initialized to an empty list.
slot, representing a list where each element contains an {{RTCRtpCodecParameters}}
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dictionary and an "enabled" boolean, and initialized to the
[=RTCRtpSender/list of implemented send codecs=], with the "enabled" flag
set in an implementation defined manner.
</p>
</li>
<li class="no-test-needed">
Expand Down Expand Up @@ -8968,6 +8973,15 @@ <h2>
dictionaries representing the most optimistic view of the codecs the user
agent supports for sending media of the given <var>kind</var> (video or audio).
</p>
<p class="note">
This conceptual list contains every combination of parameters that
the user agent is capable of processing. In practice, this would
be implemented as a piece of code that parses the parameters and
determines whether they are acceptable or not, but this is highly
codec dependent, so for the purpose of specification, we work with
a conceptual list containing all acceptable parameter combinations.
</p>

<p>
The <dfn>list of implemented header extensions for sending</dfn>, given
<var>kind</var>, is an [=implementation-defined=] list of
Expand Down Expand Up @@ -9232,8 +9246,9 @@ <h2>
</li>
<li data-tests=
"RTCRtpParameters-codecs.html,protocol/video-codecs.https.html">
{{RTCRtpParameters/codecs}} is set to the value of the
{{RTCRtpSender/[[SendCodecs]]}} internal slot.
{{RTCRtpParameters/codecs}} is set to the codecs from the
{{RTCRtpSender/[[SendCodecs]]}} internal slot where the
"enabled" flag is true.
</li>
<li data-tests="RTCRtpParameters-encodings.html">
{{RTCRtpParameters/rtcp}}.{{RTCRtcpParameters/cname}} is
Expand Down Expand Up @@ -10265,7 +10280,9 @@ <h3>
<p>
Let <var>receiver</var> have a <dfn data-dfn-for="RTCRtpReceiver">[[\ReceiveCodecs]]</dfn>
internal slot, representing a list of {{RTCRtpCodecParameters}}
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dictionaries, and initialized to an empty list.
dictionaries, and initialized to an list containing all the codecs in the
<a>list of implemented receive codecs</a> for <var>kind</var>, and with the "enabled" flag
set in an implementation defined manner.
</p>
</li>
<li>
Expand Down Expand Up @@ -10379,6 +10396,14 @@ <h2>
the codecs the user agent supports for receiving media of the given
<var>kind</var> (video or audio).
</p>
<p class="note">
This conceptual list contains every combination of parameters that
the user agent is capable of processing. In practice, this would
be implemented as a piece of code that parses the parameters and
determines whether they are acceptable or not, but this is highly
codec dependent, so for the purpose of specification, we work with
a conceptual list containing all acceptable parameter combinations.
</p>
<p>
The <dfn>list of implemented header extensions for receiving</dfn>, given
<var>kind</var>, is an [=implementation-defined=] list of
Expand Down Expand Up @@ -10427,6 +10452,7 @@ <h2>
<li data-tests="RTCRtpReceiver-getParameters.html">
<p>
{{RTCRtpParameters/codecs}} is set to the value of the
"enabled" codecs from the
{{RTCRtpReceiver/[[ReceiveCodecs]]}} internal slot.
</p>
<div class="note">
Expand Down
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