From 239e9a338502db58c125ac3de0a46954295f9666 Mon Sep 17 00:00:00 2001
From: "Timothy B. Terriberry" <tterribe@xiph.org>
Date: Wed, 21 Nov 2012 18:48:09 -0800
Subject: [PATCH] Add support for RFC5576 source-level attributes.
This allows the sender parameters sprop-maxcapturerate and
sprop-stereo to be specified on a per-SSRC basis, instead of just
per m-line.
---
doc/draft-spittka-payload-rtp-opus.xml | 29 +++++++++++++++++++++-----
1 file changed, 24 insertions(+), 5 deletions(-)
diff --git a/doc/draft-spittka-payload-rtp-opus.xml b/doc/draft-spittka-payload-rtp-opus.xml
index ed073c978..ee99bd66e 100644
--- a/doc/draft-spittka-payload-rtp-opus.xml
+++ b/doc/draft-spittka-payload-rtp-opus.xml
@@ -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 6.3 of <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>
--
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