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<?xml version="1.0" ?>
<node name="/Call1_Content_Media_Description_Interface_RTCP_Feedback1" xmlns:tp="http://telepathy.freedesktop.org/wiki/DbusSpec#extensions-v0">
<tp:copyright> Copyright © 2005-2010 Nokia Corporation </tp:copyright>
<tp:copyright> Copyright © 2005-2010 Collabora Ltd </tp:copyright>
<tp:license xmlns="http://www.w3.org/1999/xhtml">
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
</tp:license>
<interface name="im.telepathy.v1.Call1.Content.MediaDescription.Interface.RTCPFeedback1">
<tp:added version="0.25.2">(as stable API)</tp:added>
<tp:requires interface="im.telepathy.v1.Call1.Content.MediaDescription"/>
<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
<p>This codec offer interface provides a method of signalling
support for RTCP feedback, documented by <em>Extended RTP
Profile for Real-time Transport Control Protocol (RTCP)-Based
Feedback (RTP/AVPF)</em> (RFC 4585).</p>
<p>The codec identifiers used in the description of the Feedback Messages
sent in the <tp:dbus-ref
namespace="imt1.Call1.Content.MediaDescription">Accept</tp:dbus-ref>'s
should match those used for the RemoteCodecs in the same Accept call.
</p>
<p>For more details on what RTCP Feedback can do and how to use
it, one should refer to
<a href="http://www.faqs.org/rfcs/rfc4585.html">RFC 4585</a>.</p>
</tp:docstring>
<tp:struct name="RTCP_Feedback_Message_Properties">
<tp:added version="0.22.1"/>
<tp:changed version="0.23.4">This struct is also used by Call, but
in call, the CM should know about RTP profiles, and never use MAXUINT
as a default value, because it complicates things unnecessarily.
</tp:changed>
<tp:member type="u" name="RTCPMinimumInterval">
<tp:docstring>
The minimum interval between two regular RTCP packets in
milliseconds for this content. If no special value is
required, 5000 (5 seconds) should be used in RTP/AVP, and a
lower value in RTP/AVPF (by default, 0).
</tp:docstring>
</tp:member>
<tp:member type="a(sss)" tp:type="RTCP_Feedback_Message[]"
name="Messages">
<tp:docstring>
The RTCP feedback messages for this codec.
</tp:docstring>
</tp:member>
</tp:struct>
<tp:struct name="RTCP_Feedback_Message"
array-name="RTCP_Feedback_Message_List">
<tp:added version="0.22.1"/>
<tp:docstring>
A struct defining an RTCP feedback message.
</tp:docstring>
<tp:member type="s" name="Type">
<tp:docstring>
Feedback type, for example "ack", "nack", or "ccm".
</tp:docstring>
</tp:member>
<tp:member type="s" name="Subtype">
<tp:docstring>
Feedback subtype, according to the Type, can be an empty string (""),
if there is no subtype.
For example, generic nack is Type="nack" Subtype="".
</tp:docstring>
</tp:member>
<tp:member type="s" name="Parameters">
<tp:docstring>
Feedback parameters as a string. Format is defined in the relevant RFC
</tp:docstring>
</tp:member>
</tp:struct>
<tp:mapping name="RTCP_Feedback_Message_Map">
<tp:added version="0.22.1"/>
<tp:docstring>
A map of codec and its feedback properties.
</tp:docstring>
<tp:member type="u" name="Codec_Identifier">
<tp:docstring>
Numeric identifier for the codec. This will be used as the
PT in the SDP or content description.
</tp:docstring>
</tp:member>
<tp:member type="(ua(sss))" tp:type="RTCP_Feedback_Message_Properties"
name="Properties">
<tp:docstring>
The RTCP feedback properties for this codec.
</tp:docstring>
</tp:member>
</tp:mapping>
<property name="FeedbackMessages" type="a{u(ua(sss))}"
tp:type="RTCP_Feedback_Message_Map"
access="read" tp:name-for-bindings="Feedback_Messages">
<tp:docstring>
A map of remote feedback codec properties that are supported.
</tp:docstring>
</property>
<property name="DoesAVPF" type="b"
access="read" tp:name-for-bindings="Does_AVPF">
<tp:docstring>
True if the remote contact supports Audio-Visual Profile
Feedback (AVPF), otherwise False.
</tp:docstring>
</property>
</interface>
</node>
<!-- vim:set sw=2 sts=2 et ft=xml: -->
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