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

webrtc/ortc/ortcfactory.cc

Index: webrtc/ortc/ortcfactory.cc
diff --git a/webrtc/ortc/ortcfactory.cc b/webrtc/ortc/ortcfactory.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a6a018155f0b00e82ad8b0ee53977345e6c44218
--- /dev/null
+++ b/webrtc/ortc/ortcfactory.cc
@@ -0,0 +1,472 @@
+/*
+ *  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/ortcfactory.h"
+
+#include <sstream>
+#include <vector>
+#include <utility>  // For std::move.
+
+#include "webrtc/api/proxy.h"
+#include "webrtc/api/mediastreamtrackproxy.h"
+#include "webrtc/api/rtcerror.h"
+#include "webrtc/api/videosourceproxy.h"
+#include "webrtc/base/asyncpacketsocket.h"
+#include "webrtc/base/bind.h"
+#include "webrtc/base/checks.h"
+#include "webrtc/base/helpers.h"
+#include "webrtc/base/logging.h"
+#include "webrtc/logging/rtc_event_log/rtc_event_log.h"
+#include "webrtc/media/base/mediaconstants.h"
+#include "webrtc/modules/audio_coding/codecs/builtin_audio_decoder_factory.h"
+#include "webrtc/ortc/ortcrtpreceiveradapter.h"
+#include "webrtc/ortc/ortcrtpsenderadapter.h"
+#include "webrtc/ortc/rtpparametersconversion.h"
+#include "webrtc/ortc/rtptransportadapter.h"
+#include "webrtc/ortc/rtptransportcontrolleradapter.h"
+#include "webrtc/p2p/base/basicpacketsocketfactory.h"
+#include "webrtc/p2p/base/udptransport.h"
+#include "webrtc/pc/channelmanager.h"
+#include "webrtc/pc/localaudiosource.h"
+#include "webrtc/pc/audiotrack.h"
+#include "webrtc/pc/videocapturertracksource.h"
+#include "webrtc/pc/videotrack.h"
+
+namespace {
+
+const int kDefaultRtcpCnameLength = 16;
+
+// Asserts that all of the built-in capabilities can be converted to
+// RtpCapabilities. If they can't, something's wrong (for example, maybe a new
+// feedback mechanism is supported, but an enum value wasn't added to
+// rtpparameters.h).
+template <typename C>
+webrtc::RtpCapabilities ToRtpCapabilitiesWithAsserts(
+    const std::vector<C>& cricket_codecs,
+    const cricket::RtpHeaderExtensions& cricket_extensions) {
+  webrtc::RtpCapabilities capabilities =
+      webrtc::ToRtpCapabilities(cricket_codecs, cricket_extensions);
+  RTC_DCHECK_EQ(capabilities.codecs.size(), cricket_codecs.size());
+  for (size_t i = 0; i < capabilities.codecs.size(); ++i) {
+    RTC_DCHECK_EQ(capabilities.codecs[i].rtcp_feedback.size(),
+                  cricket_codecs[i].feedback_params.params().size());
+  }
+  RTC_DCHECK_EQ(capabilities.header_extensions.size(),
+                cricket_extensions.size());
+  return capabilities;
+}
+
+}  // namespace
+
+namespace webrtc {
+
+// Note that this proxy class uses the network thread as the "worker" thread.
+BEGIN_OWNED_PROXY_MAP(OrtcFactory)
+PROXY_SIGNALING_THREAD_DESTRUCTOR()
+PROXY_METHOD0(RTCErrorOr<std::unique_ptr<RtpTransportControllerInterface>>,
+              CreateRtpTransportController)
+PROXY_METHOD4(RTCErrorOr<std::unique_ptr<RtpTransportInterface>>,
+              CreateRtpTransport,
+              const RtcpParameters&,
+              PacketTransportInterface*,
+              PacketTransportInterface*,
+              RtpTransportControllerInterface*)
+PROXY_CONSTMETHOD1(RtpCapabilities,
+                   GetRtpSenderCapabilities,
+                   cricket::MediaType)
+PROXY_METHOD2(RTCErrorOr<std::unique_ptr<OrtcRtpSenderInterface>>,
+              CreateRtpSender,
+              rtc::scoped_refptr<MediaStreamTrackInterface>,
+              RtpTransportInterface*)
+PROXY_METHOD2(RTCErrorOr<std::unique_ptr<OrtcRtpSenderInterface>>,
+              CreateRtpSender,
+              cricket::MediaType,
+              RtpTransportInterface*)
+PROXY_CONSTMETHOD1(RtpCapabilities,
+                   GetRtpReceiverCapabilities,
+                   cricket::MediaType)
+PROXY_METHOD2(RTCErrorOr<std::unique_ptr<OrtcRtpReceiverInterface>>,
+              CreateRtpReceiver,
+              cricket::MediaType,
+              RtpTransportInterface*)
+PROXY_WORKER_METHOD3(RTCErrorOr<std::unique_ptr<UdpTransportInterface>>,
+                     CreateUdpTransport,
+                     int,
+                     uint16_t,
+                     uint16_t)
+PROXY_METHOD1(rtc::scoped_refptr<AudioSourceInterface>,
+              CreateAudioSource,
+              const cricket::AudioOptions&)
+PROXY_METHOD2(rtc::scoped_refptr<VideoTrackSourceInterface>,
+              CreateVideoSource,
+              std::unique_ptr<cricket::VideoCapturer>,
+              const MediaConstraintsInterface*)
+PROXY_METHOD2(rtc::scoped_refptr<VideoTrackInterface>,
+              CreateVideoTrack,
+              const std::string&,
+              VideoTrackSourceInterface*)
+PROXY_METHOD2(rtc::scoped_refptr<AudioTrackInterface>,
+              CreateAudioTrack,
+              const std::string&,
+              AudioSourceInterface*)
+END_PROXY_MAP()
+
+// static
+RTCErrorOr<std::unique_ptr<OrtcFactoryInterface>> OrtcFactory::Create(
+    rtc::Thread* network_thread,
+    rtc::Thread* signaling_thread,
+    rtc::NetworkManager* network_manager,
+    rtc::PacketSocketFactory* socket_factory,
+    AudioDeviceModule* adm,
+    std::unique_ptr<cricket::MediaEngineInterface> media_engine) {
+  // Hop to signaling thread if needed.
+  if (signaling_thread && !signaling_thread->IsCurrent()) {
+    return signaling_thread
+        ->Invoke<RTCErrorOr<std::unique_ptr<OrtcFactoryInterface>>>(
+            RTC_FROM_HERE,
+            rtc::Bind(&OrtcFactoryInterface::Create, network_thread,
+                      signaling_thread, network_manager, socket_factory, adm));
+  }
+  std::unique_ptr<OrtcFactory> new_factory(new OrtcFactory(
+      network_thread, signaling_thread, network_manager, socket_factory, adm));
+  RTCError err = new_factory->Initialize(std::move(media_engine));
+  if (!err.ok()) {
+    return err;
+  }
+  // Return a proxy so that any calls on the returned object (including
+  // destructor) happen on the signaling thread.
+  return OrtcFactoryProxy::Create(new_factory->signaling_thread(),
+                                  new_factory->network_thread(),
+                                  new_factory.release());
+}
+
+RTCErrorOr<std::unique_ptr<OrtcFactoryInterface>> OrtcFactoryInterface::Create(
+    rtc::Thread* network_thread,
+    rtc::Thread* signaling_thread,
+    rtc::NetworkManager* network_manager,
+    rtc::PacketSocketFactory* socket_factory,
+    AudioDeviceModule* adm) {
+  return OrtcFactory::Create(network_thread, signaling_thread, network_manager,
+                             socket_factory, adm, nullptr);
+}
+
+OrtcFactory::OrtcFactory(rtc::Thread* network_thread,
+                         rtc::Thread* signaling_thread,
+                         rtc::NetworkManager* network_manager,
+                         rtc::PacketSocketFactory* socket_factory,
+                         AudioDeviceModule* adm)
+    : network_thread_(network_thread),
+      signaling_thread_(signaling_thread),
+      network_manager_(network_manager),
+      socket_factory_(socket_factory),
+      adm_(adm),
+      null_event_log_(RtcEventLog::CreateNull()),
+      audio_decoder_factory_(CreateBuiltinAudioDecoderFactory()) {
+  if (!rtc::CreateRandomString(kDefaultRtcpCnameLength, &default_cname_)) {
+    LOG(LS_ERROR) << "Failed to generate CNAME?";
+    RTC_NOTREACHED();
+  }
+  if (!network_thread_) {
+    owned_network_thread_ = rtc::Thread::CreateWithSocketServer();
+    owned_network_thread_->Start();
+    network_thread_ = owned_network_thread_.get();
+  }
+
+  // The worker thread is created internally because it's an implementation
+  // detail, and consumers of the API don't need to really know about it.
+  worker_thread_ = rtc::Thread::Create();
+  worker_thread_->Start();
+
+  if (signaling_thread_) {
+    RTC_DCHECK_RUN_ON(signaling_thread_);
+  } else {
+    signaling_thread_ = rtc::Thread::Current();
+    if (!signaling_thread_) {
+      // If this thread isn't already wrapped by an rtc::Thread, create a
+      // wrapper and own it in this class.
+      signaling_thread_ = rtc::ThreadManager::Instance()->WrapCurrentThread();
+      wraps_signaling_thread_ = true;
+    }
+  }
+  if (!network_manager_) {
+    owned_network_manager_.reset(new rtc::BasicNetworkManager());
+    network_manager_ = owned_network_manager_.get();
+  }
+  if (!socket_factory_) {
+    owned_socket_factory_.reset(
+        new rtc::BasicPacketSocketFactory(network_thread_));
+    socket_factory_ = owned_socket_factory_.get();
+  }
+}
+
+OrtcFactory::~OrtcFactory() {
+  RTC_DCHECK_RUN_ON(signaling_thread_);
+  if (wraps_signaling_thread_) {
+    rtc::ThreadManager::Instance()->UnwrapCurrentThread();
+  }
+}
+
+RTCErrorOr<std::unique_ptr<RtpTransportControllerInterface>>
+OrtcFactory::CreateRtpTransportController() {
+  RTC_DCHECK_RUN_ON(signaling_thread_);
+  return RtpTransportControllerAdapter::CreateProxied(
+      cricket::MediaConfig(), channel_manager_.get(), null_event_log_.get(),
+      signaling_thread_, worker_thread_.get());
+}
+
+RTCErrorOr<std::unique_ptr<RtpTransportInterface>>
+OrtcFactory::CreateRtpTransport(
+    const RtcpParameters& rtcp_parameters,
+    PacketTransportInterface* rtp,
+    PacketTransportInterface* rtcp,
+    RtpTransportControllerInterface* transport_controller) {
+  RTC_DCHECK_RUN_ON(signaling_thread_);
+  RtcpParameters copied_parameters = rtcp_parameters;
+  if (copied_parameters.cname.empty()) {
+    copied_parameters.cname = default_cname_;
+  }
+  if (transport_controller) {
+    return RtpTransportAdapter::CreateProxied(copied_parameters, rtp, rtcp,
+                                              transport_controller);
+  } else {
+    // If |transport_controller| is null, create one automatically, which the
+    // returned RtpTransport will own.
+    auto result = CreateRtpTransportController();
+    if (!result.ok()) {
+      return result.MoveError();
+    }
+    return RtpTransportAdapter::CreateProxied(copied_parameters, rtp, rtcp,
+                                              result.MoveValue());
+  }
+}
+
+RtpCapabilities OrtcFactory::GetRtpSenderCapabilities(
+    cricket::MediaType kind) const {
+  RTC_DCHECK_RUN_ON(signaling_thread_);
+  switch (kind) {
+    case cricket::MEDIA_TYPE_AUDIO: {
+      cricket::AudioCodecs cricket_codecs;
+      cricket::RtpHeaderExtensions cricket_extensions;
+      channel_manager_->GetSupportedAudioSendCodecs(&cricket_codecs);
+      channel_manager_->GetSupportedAudioRtpHeaderExtensions(
+          &cricket_extensions);
+      return ToRtpCapabilitiesWithAsserts(cricket_codecs, cricket_extensions);
+    }
+    case cricket::MEDIA_TYPE_VIDEO: {
+      cricket::VideoCodecs cricket_codecs;
+      cricket::RtpHeaderExtensions cricket_extensions;
+      channel_manager_->GetSupportedVideoCodecs(&cricket_codecs);
+      channel_manager_->GetSupportedVideoRtpHeaderExtensions(
+          &cricket_extensions);
+      return ToRtpCapabilitiesWithAsserts(cricket_codecs, cricket_extensions);
+    }
+    case cricket::MEDIA_TYPE_DATA:
+      return RtpCapabilities();
+  }
+}
+
+RTCErrorOr<std::unique_ptr<OrtcRtpSenderInterface>>
+OrtcFactory::CreateRtpSender(
+    rtc::scoped_refptr<MediaStreamTrackInterface> track,
+    RtpTransportInterface* transport) {
+  RTC_DCHECK_RUN_ON(signaling_thread_);
+  if (!track) {
+    LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
+                         "Cannot pass null track into CreateRtpSender.");
+  }
+  auto result =
+      CreateRtpSender(cricket::MediaTypeFromString(track->kind()), transport);
+  if (!result.ok()) {
+    return result;
+  }
+  auto err = result.value()->SetTrack(track);
+  if (!err.ok()) {
+    return err;
+  }
+  return result;
+}
+
+RTCErrorOr<std::unique_ptr<OrtcRtpSenderInterface>>
+OrtcFactory::CreateRtpSender(cricket::MediaType kind,
+                             RtpTransportInterface* transport) {
+  RTC_DCHECK_RUN_ON(signaling_thread_);
+  if (kind == cricket::MEDIA_TYPE_DATA) {
+    LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
+                         "Cannot create data RtpSender.");
+  }
+  if (!transport) {
+    LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
+                         "Cannot pass null transport into CreateRtpSender.");
+  }
+  return transport->GetInternal()
+      ->rtp_transport_controller()
+      ->CreateProxiedRtpSender(kind, transport);
+}
+
+RtpCapabilities OrtcFactory::GetRtpReceiverCapabilities(
+    cricket::MediaType kind) const {
+  RTC_DCHECK_RUN_ON(signaling_thread_);
+  switch (kind) {
+    case cricket::MEDIA_TYPE_AUDIO: {
+      cricket::AudioCodecs cricket_codecs;
+      cricket::RtpHeaderExtensions cricket_extensions;
+      channel_manager_->GetSupportedAudioReceiveCodecs(&cricket_codecs);
+      channel_manager_->GetSupportedAudioRtpHeaderExtensions(
+          &cricket_extensions);
+      return ToRtpCapabilitiesWithAsserts(cricket_codecs, cricket_extensions);
+    }
+    case cricket::MEDIA_TYPE_VIDEO: {
+      cricket::VideoCodecs cricket_codecs;
+      cricket::RtpHeaderExtensions cricket_extensions;
+      channel_manager_->GetSupportedVideoCodecs(&cricket_codecs);
+      channel_manager_->GetSupportedVideoRtpHeaderExtensions(
+          &cricket_extensions);
+      return ToRtpCapabilitiesWithAsserts(cricket_codecs, cricket_extensions);
+    }
+    case cricket::MEDIA_TYPE_DATA:
+      return RtpCapabilities();
+  }
+}
+
+RTCErrorOr<std::unique_ptr<OrtcRtpReceiverInterface>>
+OrtcFactory::CreateRtpReceiver(cricket::MediaType kind,
+                               RtpTransportInterface* transport) {
+  RTC_DCHECK_RUN_ON(signaling_thread_);
+  if (kind == cricket::MEDIA_TYPE_DATA) {
+    LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
+                         "Cannot create data RtpReceiver.");
+  }
+  if (!transport) {
+    LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
+                         "Cannot pass null transport into CreateRtpReceiver.");
+  }
+  return transport->GetInternal()
+      ->rtp_transport_controller()
+      ->CreateProxiedRtpReceiver(kind, transport);
+}
+
+// UdpTransport expects all methods to be called on one thread, which needs to
+// be the network thread, since that's where its socket can safely be used. So
+// return a proxy to the created UdpTransport.
+BEGIN_OWNED_PROXY_MAP(UdpTransport)
+PROXY_WORKER_THREAD_DESTRUCTOR()
+PROXY_WORKER_CONSTMETHOD0(rtc::SocketAddress, GetLocalAddress)
+PROXY_WORKER_METHOD1(bool, SetRemoteAddress, const rtc::SocketAddress&)
+PROXY_WORKER_CONSTMETHOD0(rtc::SocketAddress, GetRemoteAddress)
+protected:
+rtc::PacketTransportInternal* GetInternal() override {
+  return internal();
+}
+END_PROXY_MAP()
+
+RTCErrorOr<std::unique_ptr<UdpTransportInterface>>
+OrtcFactory::CreateUdpTransport(int family,
+                                uint16_t min_port,
+                                uint16_t max_port) {
+  RTC_DCHECK_RUN_ON(network_thread_);
+  if (family != AF_INET && family != AF_INET6) {
+    LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
+                         "Address family must be AF_INET or AF_INET6.");
+  }
+  if (min_port > max_port) {
+    LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_RANGE,
+                         "Port range invalid; minimum port must be less than "
+                         "or equal to max port.");
+  }
+  std::unique_ptr<rtc::AsyncPacketSocket> socket(
+      socket_factory_->CreateUdpSocket(
+          rtc::SocketAddress(rtc::GetAnyIP(family), 0), min_port, max_port));
+  if (!socket) {
+    // Only log at warning level, because this method may be called with
+    // specific port ranges to determine if a port is available, expecting the
+    // possibility of an error.
+    LOG_AND_RETURN_ERROR_EX(RTCErrorType::RESOURCE_EXHAUSTED,
+                            "Local socket allocation failure.", LS_WARNING);
+  }
+  LOG(LS_INFO) << "Created UDP socket with address "
+               << socket->GetLocalAddress().ToSensitiveString() << ".";
+  // Make a unique debug name (for logging/diagnostics only).
+  std::ostringstream oss;
+  static int udp_id = 0;
+  oss << "udp" << udp_id++;
+  return UdpTransportProxyWithInternal<cricket::UdpTransport>::Create(
+      signaling_thread_, network_thread_,
+      new cricket::UdpTransport(oss.str(), std::move(socket)));
+}
+
+rtc::scoped_refptr<AudioSourceInterface> OrtcFactory::CreateAudioSource(
+    const cricket::AudioOptions& options) {
+  RTC_DCHECK_RUN_ON(signaling_thread_);
+  return rtc::scoped_refptr<LocalAudioSource>(
+      LocalAudioSource::Create(&options));
+}
+
+rtc::scoped_refptr<VideoTrackSourceInterface> OrtcFactory::CreateVideoSource(
+    std::unique_ptr<cricket::VideoCapturer> capturer,
+    const MediaConstraintsInterface* constraints) {
+  RTC_DCHECK_RUN_ON(signaling_thread_);
+  rtc::scoped_refptr<VideoTrackSourceInterface> source(
+      VideoCapturerTrackSource::Create(
+          worker_thread_.get(), std::move(capturer), constraints, false));
+  return VideoTrackSourceProxy::Create(signaling_thread_, worker_thread_.get(),
+                                       source);
+}
+
+rtc::scoped_refptr<VideoTrackInterface> OrtcFactory::CreateVideoTrack(
+    const std::string& id,
+    VideoTrackSourceInterface* source) {
+  RTC_DCHECK_RUN_ON(signaling_thread_);
+  rtc::scoped_refptr<VideoTrackInterface> track(VideoTrack::Create(id, source));
+  return VideoTrackProxy::Create(signaling_thread_, worker_thread_.get(),
+                                 track);
+}
+
+rtc::scoped_refptr<AudioTrackInterface> OrtcFactory::CreateAudioTrack(
+    const std::string& id,
+    AudioSourceInterface* source) {
+  RTC_DCHECK_RUN_ON(signaling_thread_);
+  rtc::scoped_refptr<AudioTrackInterface> track(AudioTrack::Create(id, source));
+  return AudioTrackProxy::Create(signaling_thread_, track);
+}
+
+RTCError OrtcFactory::Initialize(
+    std::unique_ptr<cricket::MediaEngineInterface> media_engine) {
+  RTC_DCHECK_RUN_ON(signaling_thread_);
+  // TODO(deadbeef): Get rid of requirement to hop to worker thread here.
+  if (!media_engine) {
+    media_engine =
+        worker_thread_->Invoke<std::unique_ptr<cricket::MediaEngineInterface>>(
+            RTC_FROM_HERE, rtc::Bind(&OrtcFactory::CreateMediaEngine_w, this));
+  }
+
+  channel_manager_.reset(new cricket::ChannelManager(
+      std::move(media_engine), worker_thread_.get(), network_thread_));
+  channel_manager_->SetVideoRtxEnabled(true);
+  if (!channel_manager_->Init()) {
+    LOG_AND_RETURN_ERROR(RTCErrorType::INTERNAL_ERROR,
+                         "Failed to initialize ChannelManager.");
+  }
+  return RTCError::OK();
+}
+
+std::unique_ptr<cricket::MediaEngineInterface>
+OrtcFactory::CreateMediaEngine_w() {
+  RTC_DCHECK_RUN_ON(worker_thread_.get());
+  // The null arguments are optional factories that could be passed into the
+  // OrtcFactory, but aren't yet.
+  //
+  // Note that |adm_| may be null, in which case the platform-specific default
+  // AudioDeviceModule will be used.
+  return std::unique_ptr<cricket::MediaEngineInterface>(
+      cricket::WebRtcMediaEngineFactory::Create(adm_, audio_decoder_factory_,
+                                                nullptr, nullptr, nullptr));
+}
+
+}  // namespace webrtc