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

webrtc/ortc/rtptransportshim.cc

+/*
+ *  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.
+ */
+
+#include "webrtc/ortc/rtptransportshim.h"
+
+#include <algorithm>  // For find.
+#include <set>
+#include <sstream>
+
+#include "webrtc/api/proxy.h"
+#include "webrtc/base/helpers.h"
+#include "webrtc/base/logging.h"
+
+namespace {
+
+static const int kDefaultRtcpCnameLength = 16;
+
+}  // namespace
+
+namespace webrtc {
+
+BEGIN_OWNED_PROXY_MAP(RtpTransport)
+PROXY_SIGNALING_THREAD_DESTRUCTOR()
+PROXY_CONSTMETHOD0(PacketTransportInterface*, GetRtpPacketTransport)
+PROXY_CONSTMETHOD0(PacketTransportInterface*, GetRtcpPacketTransport)
+PROXY_METHOD1(RTCError, SetRtcpParameters, const RtcpParameters&)
+PROXY_CONSTMETHOD0(RtcpParameters, GetRtcpParameters)
+protected:
+RtpTransportShim* GetInternal() override {
+  return internal();
+}
+END_PROXY_MAP()
+
+// static
+RTCErrorOr<std::unique_ptr<RtpTransportInterface>>
+RtpTransportShim::CreateProxied(
+    const RtcpParameters& rtcp_parameters,
+    PacketTransportInterface* rtp,
+    PacketTransportInterface* rtcp,
+    RtpTransportControllerInterface* rtp_transport_controller) {
+  if (!rtp) {
+    return CreateAndLogError(RTCErrorType::INVALID_PARAMETER,
+                             "Must provide an RTP packet transport.");
+  }
+  if (!rtcp_parameters.mux && !rtcp) {
+    return CreateAndLogError(
+        RTCErrorType::INVALID_PARAMETER,
+        "Must provide an RTCP packet transport when RTCP muxing is not used.");
+  }
+  if (rtcp_parameters.mux) {
+    rtcp = nullptr;
+  }
+  if (!rtp_transport_controller) {
+    return CreateAndLogError(RTCErrorType::INVALID_PARAMETER,
+                             "Must provide an RTP transport controller.");
+  }
+  RtpTransportControllerShim* internal_controller =
+      rtp_transport_controller->GetInternal();
+  return RtpTransportProxyWithInternal<RtpTransportShim>::Create(
+      internal_controller->signaling_thread(),
+      internal_controller->worker_thread(),
+      new RtpTransportShim(rtcp_parameters, rtp, rtcp, internal_controller));
+}
+
+RTCErrorOr<std::unique_ptr<RtpTransportInterface>>
+RtpTransportShim::CreateProxied(
+    const RtcpParameters& rtcp_parameters,
+    PacketTransportInterface* rtp,
+    PacketTransportInterface* rtcp,
+    std::unique_ptr<RtpTransportControllerInterface> rtp_transport_controller) {
+  auto result =
+      CreateProxied(rtcp_parameters, rtp, rtcp, rtp_transport_controller.get());
+  // If RtpTransport was successfully created, transfer ownership of
+  // |rtp_transport_controller|. Otherwise it will go out of scope and be
+  // deleted automatically.
+  if (result.ok()) {
+    result.value()->GetInternal()->owned_rtp_transport_controller_.reset(
+        rtp_transport_controller.release());
+  }
+  return result;
+}
+
+RtpTransportShim::~RtpTransportShim() {
+  rtp_transport_controller_->RemoveTransport(this);
+}
+
+PacketTransportInterface* RtpTransportShim::GetRtpPacketTransport() const {
+  return rtp_packet_transport_;
+}
+
+PacketTransportInterface* RtpTransportShim::GetRtcpPacketTransport() const {
+  return rtcp_packet_transport_;
+}
+
+RTCError RtpTransportShim::SetRtcpParameters(const RtcpParameters& parameters) {
+  if (!parameters.mux && rtcp_parameters_.mux) {
+    return CreateAndLogError(webrtc::RTCErrorType::INVALID_STATE,
+                             "Can't disable RTCP muxing after enabling.");
+  }
+  RTCError err = rtp_transport_controller_->SetRtcpParameters(parameters, this);
+  if (!err.ok()) {
+    return err;
+  }
+  rtcp_parameters_ = parameters;
+  if (parameters.mux) {
+    rtcp_packet_transport_ = nullptr;
+  }
+  return RTCError();
+}
+
+RtpTransportShim::RtpTransportShim(
+    const RtcpParameters& rtcp_parameters,
+    PacketTransportInterface* rtp,
+    PacketTransportInterface* rtcp,
+    RtpTransportControllerShim* rtp_transport_controller)
+    : rtp_packet_transport_(rtp),
+      rtcp_packet_transport_(rtcp),
+      rtp_transport_controller_(rtp_transport_controller),
+      rtcp_parameters_(rtcp_parameters) {
+  RTC_DCHECK(rtp_transport_controller);
+  if (rtcp_parameters_.cname.empty()) {
+    if (!rtc::CreateRandomString(kDefaultRtcpCnameLength,
+                                 &rtcp_parameters_.cname)) {
+      LOG(LS_ERROR) << "Failed to generate CNAME.";
+      RTC_NOTREACHED();
+    }
+  }
+  rtp_transport_controller_->AddTransport(this);
+}
+
+}  // namespace webrtc