4ab68eec96
SDP is a detail of PeerConnection and is not used by anything in p2p, so it belongs in the pc/ directory. This also allows MediaContentDescription to be inlined in the future. Bug: webrtc:8620 Change-Id: I38b65ede9942e29eb15035ab29f2be988da1e5ce Reviewed-on: https://webrtc-review.googlesource.com/33781 Reviewed-by: Niklas Enbom <niklas.enbom@webrtc.org> Reviewed-by: Peter Thatcher <pthatcher@webrtc.org> Commit-Queue: Steve Anton <steveanton@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21376}
79 lines
2.6 KiB
C++
79 lines
2.6 KiB
C++
/*
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* Copyright 2004 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef PC_RTCPMUXFILTER_H_
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#define PC_RTCPMUXFILTER_H_
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#include "pc/sessiondescription.h"
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namespace cricket {
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// RTCP Muxer, as defined in RFC 5761 (http://tools.ietf.org/html/rfc5761)
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class RtcpMuxFilter {
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public:
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RtcpMuxFilter();
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// Whether RTCP mux has been negotiated with a final answer (not provisional).
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bool IsFullyActive() const;
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// Whether RTCP mux has been negotiated with a provisional answer; this means
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// a later answer could disable RTCP mux, and so the RTCP transport should
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// not be disposed yet.
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bool IsProvisionallyActive() const;
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// Whether the filter is active, i.e. has RTCP mux been properly negotiated,
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// either with a final or provisional answer.
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bool IsActive() const;
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// Make the filter active (fully, not provisionally) regardless of the
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// current state. This should be used when an endpoint *requires* RTCP mux.
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void SetActive();
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// Specifies whether the offer indicates the use of RTCP mux.
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bool SetOffer(bool offer_enable, ContentSource src);
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// Specifies whether the provisional answer indicates the use of RTCP mux.
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bool SetProvisionalAnswer(bool answer_enable, ContentSource src);
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// Specifies whether the answer indicates the use of RTCP mux.
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bool SetAnswer(bool answer_enable, ContentSource src);
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private:
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bool ExpectOffer(bool offer_enable, ContentSource source);
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bool ExpectAnswer(ContentSource source);
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enum State {
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// RTCP mux filter unused.
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ST_INIT,
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// Offer with RTCP mux enabled received.
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// RTCP mux filter is not active.
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ST_RECEIVEDOFFER,
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// Offer with RTCP mux enabled sent.
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// RTCP mux filter can demux incoming packets but is not active.
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ST_SENTOFFER,
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// RTCP mux filter is active but the sent answer is only provisional.
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// When the final answer is set, the state transitions to ST_ACTIVE or
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// ST_INIT.
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ST_SENTPRANSWER,
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// RTCP mux filter is active but the received answer is only provisional.
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// When the final answer is set, the state transitions to ST_ACTIVE or
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// ST_INIT.
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ST_RECEIVEDPRANSWER,
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// Offer and answer set, RTCP mux enabled. It is not possible to de-activate
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// the filter.
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ST_ACTIVE
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};
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State state_;
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bool offer_enable_;
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};
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} // namespace cricket
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#endif // PC_RTCPMUXFILTER_H_
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