Adding "adapter" ORTC objects on top of ChannelManager/BaseChannel/etc.

webrtc/api/ortcrtpreceiverinterface.h

+/*
+ *  Copyright 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+// This file contains interfaces for RtpReceivers
+// http://w3c.github.io/webrtc-pc/#rtcrtpreceiver-interface
+
+#ifndef WEBRTC_API_ORTCRTPRECEIVERINTERFACE_H_
+#define WEBRTC_API_ORTCRTPRECEIVERINTERFACE_H_
+
+#include "webrtc/api/mediastreaminterface.h"
+#include "webrtc/api/mediatypes.h"
+#include "webrtc/api/rtcerror.h"
+#include "webrtc/api/rtpparameters.h"
+#include "webrtc/api/rtptransportinterface.h"
+
+namespace webrtc {
+
+// Note: Since receiver capabilities may depend on how the OrtcFactory was
+// created, instead of a static "GetCapabilities" method on this interface,
+// there is a "GetRtpReceiverCapabilities" method on the OrtcFactory.
+class OrtcRtpReceiverInterface {
+ public:
+  virtual ~OrtcRtpReceiverInterface() {}
+
+  // Returns a track representing the media received by this receiver.
+  //
+  // Will never be null. There is a 1:1 mapping between receivers and remote
+  // MediaStreamTracks.
+  virtual rtc::scoped_refptr<MediaStreamTrackInterface> GetTrack() const = 0;
+
+  // Switches to receiving media on a new transport.
+  virtual RTCError SetTransport(RtpTransportInterface* transport) = 0;
+  // Returns previously set (or constructed-with) transport.
+  virtual RtpTransportInterface* GetTransport() const = 0;
+
+  // Allows the parameters of a receiver to be changed after being constructed.
+  // There are no limitations to how the parameters can be changed after
+  // construction, as long as they're valid (for example, they can't use the
+  // same payload type for two codecs).
+  //
+  // Equivalent to "receive" in the ORTC API.
+  virtual RTCError SetParameters(const RtpParameters& parameters) = 0;
+  // Returns previously set (or constructed-with) parameters.
+  virtual RtpParameters GetParameters() const = 0;
+
+  // This isn't really necessary, since an RtpReceiver always has a track and
+  // thus you can call GetTrack()->kind(). But it's added here for parity with
+  // OrtcRtpSenderInterface.
+  virtual cricket::MediaType GetKind() const = 0;
+
+  // TODO(deadbeef): GetContributingSources
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_API_ORTCRTPRECEIVERINTERFACE_H_