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Add support for RFC5576 source-level attributes.

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This allows the sender parameters sprop-maxcapturerate and
 sprop-stereo to be specified on a per-SSRC basis, instead of just
 per m-line.
This commit is contained in:
Timothy B. Terriberry 2012-11-21 18:48:09 -08:00
parent dd2520cd50
commit 239e9a3385
1 changed files with 24 additions and 5 deletions
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29
doc/draft-spittka-payload-rtp-opus.xml
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@ -11,6 +11,7 @@
<!ENTITY rfc2974 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.2974.xml'>
<!ENTITY rfc2326 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.2326.xml'>
<!ENTITY rfc3555 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.3555.xml'>
<!ENTITY rfc5576 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.5576.xml'>
<!ENTITY rfc6562 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.6562.xml'>
]>
@ -703,14 +704,31 @@
name. The RTP clock rate in "a=rtpmap" MUST be 48000 and the number of
channels MUST be 2.</t>
<t>The optional media type parameters "ptime" and "maxptime" are
<t>The OPTIONAL media type parameters "ptime" and "maxptime" are
mapped to "a=ptime" and "a=maxptime" attributes, respectively, in the
SDP.</t>
<t>All remaining media type parameters are mapped to the "a=fmtp"
attribute in the SDP by copying them directly from the media type
parameter string as a semicolon-separated list of parameter=value
pairs (e.g. maxaveragebitrate=20000).</t>
<t>The OPTIONAL media type parameters "maxaveragebitrate",
"minptime", "stereo", "cbr", "useinbandfec", and "usedtx", when
present, MUST be included in the "a=fmtp" attribute in the SDP,
expressed as a media type string in the form of a
semicolon-separated list of parameter=value pairs (e.g.,
maxaveragebitrate=20000). They MUST NOT be specified in an "fmtp"
source attribute parameter.</t>
<t>The OPTIONAL media type parameters "sprop-maxcapturerate",
and "sprop-stereo" MAY be mapped to the "a=fmtp" SDP attribute by
copying them directly from the media type parameter string as part
of the semicolon-separated list of parameter=value pairs (e.g.,
sprop-stereo=1). These same OPTIONAL media type parameters MAY also
be specified using an "fmtp" source attribute as described in
Section&nbsp;6.3 of&nbsp;<xref target="RFC5576"/>. They MAY be
specified in both places, in which case the "fmtp" source attribute
parameter overrides the one found on the "a=fmtp" line. The value
of any parameter which is not specified in the "fmtp" source
attribute parameter MUST be taken from the "a=fmtp" line, if it is
present there.</t>
</list>
</t>
@ -896,6 +914,7 @@
&rfc3264;
&rfc2974;
&rfc2326;
&rfc5576;
&rfc6562;
</references>