Add a minimal RtpTransport class for use by BaseChannel.

webrtc/pc/rtptransport.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.
+ */
+
+#ifndef WEBRTC_PC_RTPTRANSPORT_H_
+#define WEBRTC_PC_RTPTRANSPORT_H_
+
+namespace rtc {
+
+class PacketTransportInternal;
+
+}  // namespace rtc
+
+namespace webrtc {
+
+class RtpTransport {
+ public:
+  RtpTransport(const RtpTransport&) = delete;
+  RtpTransport& operator=(const RtpTransport&) = delete;
+
+  explicit RtpTransport(bool rtcp_mux_required)
+      : rtcp_mux_required_(rtcp_mux_required) {}
+
+  bool rtcp_mux_required() const { return rtcp_mux_required_; }
+
+  rtc::PacketTransportInternal* rtp_packet_transport() const {
+    return rtp_packet_transport_;
+  }
+  void set_rtp_packet_transport(rtc::PacketTransportInternal* rtp) {
+    rtp_packet_transport_ = rtp;
+  }
+
+  rtc::PacketTransportInternal* rtcp_packet_transport() const {
+    return rtcp_packet_transport_;
+  }
+  void set_rtcp_packet_transport(rtc::PacketTransportInternal* rtcp);
+
+ private:
+  // True if RTCP-multiplexing is required. rtcp_packet_transport_ should
+  // always be null in this case.
+  const bool rtcp_mux_required_;
+
+  // TODO(zstein): Revisit ownership here - transports are currently owned by
+  // TransportController
+  rtc::PacketTransportInternal* rtp_packet_transport_ = nullptr;
+  rtc::PacketTransportInternal* rtcp_packet_transport_ = nullptr;
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_PC_RTPTRANSPORT_H_