Standalone Receiver: Integration with ApplicationAgent.

Makes the standalone cast receiver a full Cast V2 Receiver with a
launchable "Mirroring App." Replaces "CastAgent" with three modules:

MirroringApplication (new): A front-end launcher and message port for a
ReceiverSession (and a StreamingPlaybackController, which manages the
playback UI).

ApplicatonAgent (prior patch): An implementation of the Cast V2
Application Control spec, able to launch applications and route messages
to/from them.

CastService (new): Glues it all together, from a network server socket,
through the Cast Channel infrastructure, through the ApplicationAgent
and MirroringApplication, to a ReceiverSession and playback GUI.

Bug: b/170134354
Change-Id: I9640a3d0c40f174d9f03bc26ee3c2f160736e290
Reviewed-on: https://chromium-review.googlesource.com/c/openscreen/+/2481853
Commit-Queue: Yuri Wiitala <miu@chromium.org>
Reviewed-by: Jordan Bayles <jophba@chromium.org>

1 files changed, 77 insertions, 0 deletions

diff --git a/cast/standalone_receiver/cast_service.h b/cast/standalone_receiver/cast_service.h
new file mode 100644
index 00000000..99137de2
--- /dev/null
+++ b/cast/standalone_receiver/cast_service.h
@@ -0,0 +1,77 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CAST_STANDALONE_RECEIVER_CAST_SERVICE_H_
+#define CAST_STANDALONE_RECEIVER_CAST_SERVICE_H_
+
+#include <memory>
+#include <string>
+
+#include "cast/common/public/service_info.h"
+#include "cast/receiver/application_agent.h"
+#include "cast/receiver/channel/static_credentials.h"
+#include "cast/receiver/public/receiver_socket_factory.h"
+#include "cast/standalone_receiver/mirroring_application.h"
+#include "discovery/common/reporting_client.h"
+#include "discovery/public/dns_sd_service_factory.h"
+#include "discovery/public/dns_sd_service_publisher.h"
+#include "platform/api/serial_delete_ptr.h"
+#include "platform/base/error.h"
+#include "platform/base/ip_address.h"
+
+namespace openscreen {
+
+struct InterfaceInfo;
+class TaskRunner;
+class TlsConnectionFactory;
+
+namespace cast {
+
+// Assembles all the necessary components and manages their lifetimes, to create
+// a full Cast Receiver on the network, with the following overall
+// functionality:
+//
+//   * Listens for TCP connections on port 8010.
+//   * Establishes TLS tunneling over those connections.
+//   * Wraps a CastSocket API around the TLS connections.
+//   * Manages available receiver-side applications.
+//   * Provides a Cast V2 Mirroring application (media streaming playback in an
+//     on-screen window).
+//   * Publishes over mDNS to be discoverable to all senders on the same LAN.
+class CastService final : public discovery::ReportingClient {
+ public:
+  CastService(TaskRunner* task_runner,
+              const InterfaceInfo& interface,
+              GeneratedCredentials credentials,
+              const std::string& friendly_name,
+              const std::string& model_name,
+              bool enable_discovery = true);
+
+  ~CastService() final;
+
+ private:
+  using LazyDeletedDiscoveryService = SerialDeletePtr<discovery::DnsSdService>;
+  using LazyDeletedDiscoveryPublisher =
+      SerialDeletePtr<discovery::DnsSdServicePublisher<ServiceInfo>>;
+
+  // discovery::ReportingClient overrides.
+  void OnFatalError(Error error) final;
+  void OnRecoverableError(Error error) final;
+
+  const IPEndpoint local_endpoint_;
+  const GeneratedCredentials credentials_;
+
+  ApplicationAgent agent_;
+  MirroringApplication mirroring_application_;
+  ReceiverSocketFactory socket_factory_;
+  std::unique_ptr<TlsConnectionFactory> connection_factory_;
+
+  LazyDeletedDiscoveryService discovery_service_;
+  LazyDeletedDiscoveryPublisher discovery_publisher_;
+};
+
+}  // namespace cast
+}  // namespace openscreen
+
+#endif  // CAST_STANDALONE_RECEIVER_CAST_SERVICE_H_