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diff --git a/dom/media/webrtc/libwebrtcglue/MediaConduitControl.h b/dom/media/webrtc/libwebrtcglue/MediaConduitControl.h
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index 0000000000..a860fab146
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+++ b/dom/media/webrtc/libwebrtcglue/MediaConduitControl.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef DOM_MEDIA_WEBRTC_LIBWEBRTCGLUE_MEDIACONDUITCONTROL_H_
+#define DOM_MEDIA_WEBRTC_LIBWEBRTCGLUE_MEDIACONDUITCONTROL_H_
+
+#include "jsapi/RTCDTMFSender.h"  // For DtmfEvent
+#include "mozilla/StateMirroring.h"
+#include "RtpRtcpConfig.h"
+#include <vector>
+#include <string>
+#include "mozilla/Maybe.h"
+#include "CodecConfig.h"                   // For Audio/VideoCodecConfig
+#include "api/rtp_parameters.h"            // For webrtc::RtpExtension
+#include "api/video_codecs/video_codec.h"  // For webrtc::VideoCodecMode
+
+namespace mozilla {
+
+using RtpExtList = std::vector<webrtc::RtpExtension>;
+using Ssrc = uint32_t;
+using Ssrcs = std::vector<uint32_t>;
+
+/**
+ * These are the interfaces used to control the async conduits. Some parameters
+ * are common, and some are tied to the conduit type. See
+ * MediaSessionConduit::InitConduitControl for how they are used.
+ *
+ * Put simply, the implementer of the interfaces below may set its canonicals on
+ * any thread, and the conduits will react to those changes accordingly, on
+ * their dedicated worker thread. One instance of these interfaces could control
+ * multiple conduits as each canonical can connect to any number of mirrors.
+ */
+
+class MediaConduitControlInterface {
+ public:
+  virtual AbstractCanonical<bool>* CanonicalReceiving() = 0;
+  virtual AbstractCanonical<bool>* CanonicalTransmitting() = 0;
+  virtual AbstractCanonical<Ssrcs>* CanonicalLocalSsrcs() = 0;
+  virtual AbstractCanonical<std::string>* CanonicalLocalCname() = 0;
+  virtual AbstractCanonical<std::string>* CanonicalMid() = 0;
+  virtual AbstractCanonical<Ssrc>* CanonicalRemoteSsrc() = 0;
+  virtual AbstractCanonical<std::string>* CanonicalSyncGroup() = 0;
+  virtual AbstractCanonical<RtpExtList>* CanonicalLocalRecvRtpExtensions() = 0;
+  virtual AbstractCanonical<RtpExtList>* CanonicalLocalSendRtpExtensions() = 0;
+};
+
+class AudioConduitControlInterface : public MediaConduitControlInterface {
+ public:
+  virtual AbstractCanonical<Maybe<AudioCodecConfig>>*
+  CanonicalAudioSendCodec() = 0;
+  virtual AbstractCanonical<std::vector<AudioCodecConfig>>*
+  CanonicalAudioRecvCodecs() = 0;
+  virtual MediaEventSource<DtmfEvent>& OnDtmfEvent() = 0;
+};
+
+class VideoConduitControlInterface : public MediaConduitControlInterface {
+ public:
+  virtual AbstractCanonical<Ssrcs>* CanonicalLocalVideoRtxSsrcs() = 0;
+  virtual AbstractCanonical<Ssrc>* CanonicalRemoteVideoRtxSsrc() = 0;
+  virtual AbstractCanonical<Maybe<VideoCodecConfig>>*
+  CanonicalVideoSendCodec() = 0;
+  virtual AbstractCanonical<Maybe<RtpRtcpConfig>>*
+  CanonicalVideoSendRtpRtcpConfig() = 0;
+  virtual AbstractCanonical<std::vector<VideoCodecConfig>>*
+  CanonicalVideoRecvCodecs() = 0;
+  virtual AbstractCanonical<Maybe<RtpRtcpConfig>>*
+  CanonicalVideoRecvRtpRtcpConfig() = 0;
+  virtual AbstractCanonical<webrtc::VideoCodecMode>*
+  CanonicalVideoCodecMode() = 0;
+};
+
+}  // namespace mozilla
+
+#endif