cef/libcef/browser/media_router/media_router_manager.cc

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// Copyright (c) 2020 The Chromium Embedded Framework Authors. All rights
// reserved. Use of this source code is governed by a BSD-style license that
// can be found in the LICENSE file.
#include "libcef/browser/media_router/media_router_manager.h"
#include "libcef/browser/browser_context.h"
#include "libcef/browser/thread_util.h"
#include "components/media_router/browser/media_router_factory.h"
#include "components/media_router/browser/media_routes_observer.h"
#include "components/media_router/browser/route_message_observer.h"
#include "components/media_router/browser/route_message_util.h"
namespace {
const int kTimeoutMs = 5 * 1000;
const char kDefaultPresentationUrl[] = "https://google.com";
} // namespace
class CefMediaRoutesObserver : public media_router::MediaRoutesObserver {
public:
explicit CefMediaRoutesObserver(CefMediaRouterManager* manager)
: media_router::MediaRoutesObserver(manager->GetMediaRouter()),
manager_(manager) {}
void OnRoutesUpdated(const std::vector<media_router::MediaRoute>& routes,
const std::vector<media_router::MediaRoute::Id>&
joinable_route_ids) override {
manager_->routes_ = routes;
manager_->NotifyCurrentRoutes();
}
private:
CefMediaRouterManager* const manager_;
DISALLOW_COPY_AND_ASSIGN(CefMediaRoutesObserver);
};
// Used to receive messages if PresentationConnection is not supported.
class CefRouteMessageObserver : public media_router::RouteMessageObserver {
public:
CefRouteMessageObserver(CefMediaRouterManager* manager,
const media_router::MediaRoute& route)
: media_router::RouteMessageObserver(manager->GetMediaRouter(),
route.media_route_id()),
manager_(manager),
route_(route) {}
void OnMessagesReceived(
CefMediaRouterManager::MediaMessageVector messages) override {
manager_->OnMessagesReceived(route_, messages);
}
private:
CefMediaRouterManager* const manager_;
const media_router::MediaRoute route_;
DISALLOW_COPY_AND_ASSIGN(CefRouteMessageObserver);
};
// Used for messaging and route status notifications with Cast.
class CefPresentationConnection : public blink::mojom::PresentationConnection {
public:
explicit CefPresentationConnection(
CefMediaRouterManager* manager,
const media_router::MediaRoute& route,
media_router::mojom::RoutePresentationConnectionPtr connections)
: manager_(manager),
route_(route),
connection_receiver_(this, std::move(connections->connection_receiver)),
connection_remote_(std::move(connections->connection_remote)) {}
void OnMessage(
blink::mojom::PresentationConnectionMessagePtr message) override {
CefMediaRouterManager::MediaMessageVector messages;
if (message->is_message()) {
messages.push_back(media_router::message_util::RouteMessageFromString(
message->get_message()));
} else if (message->is_data()) {
messages.push_back(media_router::message_util::RouteMessageFromData(
message->get_data()));
}
if (!messages.empty()) {
manager_->OnMessagesReceived(route_, messages);
}
}
void DidChangeState(
blink::mojom::PresentationConnectionState state) override {
// May result in |this| being deleted, so post async and allow the call
// stack to unwind.
CEF_POST_TASK(
CEF_UIT,
base::BindOnce(&CefMediaRouterManager::OnRouteStateChange,
manager_->weak_ptr_factory_.GetWeakPtr(), route_,
content::PresentationConnectionStateChangeInfo(state)));
}
void DidClose(
blink::mojom::PresentationConnectionCloseReason reason) override {
DidChangeState(blink::mojom::PresentationConnectionState::CLOSED);
}
void SendRouteMessage(const std::string& message) {
connection_remote_->OnMessage(
blink::mojom::PresentationConnectionMessage::NewMessage(message));
}
private:
CefMediaRouterManager* const manager_;
const media_router::MediaRoute route_;
// Used to receive messages from the MRP.
mojo::Receiver<blink::mojom::PresentationConnection> connection_receiver_;
// Used to send messages to the MRP.
mojo::Remote<blink::mojom::PresentationConnection> connection_remote_;
DISALLOW_COPY_AND_ASSIGN(CefPresentationConnection);
};
CefMediaRouterManager::CefMediaRouterManager(
content::BrowserContext* browser_context)
: browser_context_(browser_context),
query_result_manager_(GetMediaRouter()),
weak_ptr_factory_(this) {
// Perform initialization.
GetMediaRouter()->OnUserGesture();
query_result_manager_.AddObserver(this);
// A non-empty presentation URL to required for discovery of Cast devices.
query_result_manager_.SetSourcesForCastMode(
media_router::MediaCastMode::PRESENTATION,
{media_router::MediaSource::ForPresentationUrl(
GURL(kDefaultPresentationUrl))},
url::Origin());
routes_observer_ = std::make_unique<CefMediaRoutesObserver>(this);
}
CefMediaRouterManager::~CefMediaRouterManager() {
CEF_REQUIRE_UIT();
for (auto& observer : observers_) {
observers_.RemoveObserver(&observer);
observer.OnMediaRouterDestroyed();
}
query_result_manager_.RemoveObserver(this);
}
void CefMediaRouterManager::AddObserver(Observer* observer) {
CEF_REQUIRE_UIT();
observers_.AddObserver(observer);
}
void CefMediaRouterManager::RemoveObserver(Observer* observer) {
CEF_REQUIRE_UIT();
observers_.RemoveObserver(observer);
}
void CefMediaRouterManager::NotifyCurrentSinks() {
CEF_REQUIRE_UIT();
for (auto& observer : observers_) {
observer.OnMediaSinks(sinks_);
}
}
void CefMediaRouterManager::NotifyCurrentRoutes() {
CEF_REQUIRE_UIT();
for (auto& observer : observers_) {
observer.OnMediaRoutes(routes_);
}
}
void CefMediaRouterManager::CreateRoute(
const media_router::MediaSource::Id& source_id,
const media_router::MediaSink::Id& sink_id,
const url::Origin& origin,
CreateRouteResultCallback callback) {
GetMediaRouter()->CreateRoute(
source_id, sink_id, origin, nullptr /* web_contents */,
base::BindOnce(&CefMediaRouterManager::OnCreateRoute,
weak_ptr_factory_.GetWeakPtr(), std::move(callback)),
base::TimeDelta::FromMilliseconds(kTimeoutMs), false /* incognito */);
}
void CefMediaRouterManager::SendRouteMessage(
const media_router::MediaRoute::Id& route_id,
const std::string& message) {
// Must use PresentationConnection to send messages if it exists.
auto state = GetRouteState(route_id);
if (state && state->presentation_connection_) {
state->presentation_connection_->SendRouteMessage(message);
return;
}
GetMediaRouter()->SendRouteMessage(route_id, message);
}
void CefMediaRouterManager::TerminateRoute(
const media_router::MediaRoute::Id& route_id) {
GetMediaRouter()->TerminateRoute(route_id);
}
void CefMediaRouterManager::OnResultsUpdated(const MediaSinkVector& sinks) {
sinks_ = sinks;
NotifyCurrentSinks();
}
media_router::MediaRouter* CefMediaRouterManager::GetMediaRouter() const {
CEF_REQUIRE_UIT();
return media_router::MediaRouterFactory::GetApiForBrowserContext(
browser_context_);
}
void CefMediaRouterManager::OnCreateRoute(
CreateRouteResultCallback callback,
media_router::mojom::RoutePresentationConnectionPtr connection,
const media_router::RouteRequestResult& result) {
CEF_REQUIRE_UIT();
if (result.route()) {
CreateRouteState(*result.route(), std::move(connection));
}
std::move(callback).Run(result);
}
void CefMediaRouterManager::OnRouteStateChange(
const media_router::MediaRoute& route,
const content::PresentationConnectionStateChangeInfo& info) {
CEF_REQUIRE_UIT();
if (info.state == blink::mojom::PresentationConnectionState::CLOSED ||
info.state == blink::mojom::PresentationConnectionState::TERMINATED) {
RemoveRouteState(route.media_route_id());
}
for (auto& observer : observers_) {
observer.OnMediaRouteStateChange(route, info);
}
}
void CefMediaRouterManager::OnMessagesReceived(
const media_router::MediaRoute& route,
const MediaMessageVector& messages) {
CEF_REQUIRE_UIT();
for (auto& observer : observers_) {
observer.OnMediaRouteMessages(route, messages);
}
}
void CefMediaRouterManager::CreateRouteState(
const media_router::MediaRoute& route,
media_router::mojom::RoutePresentationConnectionPtr connection) {
const auto route_id = route.media_route_id();
auto state = std::make_unique<RouteState>();
if (!connection.is_null()) {
// PresentationConnection must be used for messaging and status
// notifications if it exists.
state->presentation_connection_ =
std::make_unique<CefPresentationConnection>(this, route,
std::move(connection));
} else {
// Fallback if PresentationConnection is not supported.
state->message_observer_ =
std::make_unique<CefRouteMessageObserver>(this, route);
state->state_subscription_ =
GetMediaRouter()->AddPresentationConnectionStateChangedCallback(
route_id,
base::BindRepeating(&CefMediaRouterManager::OnRouteStateChange,
weak_ptr_factory_.GetWeakPtr(), route));
}
route_state_map_.insert(std::make_pair(route_id, std::move(state)));
}
CefMediaRouterManager::RouteState* CefMediaRouterManager::GetRouteState(
const media_router::MediaRoute::Id& route_id) {
const auto it = route_state_map_.find(route_id);
if (it != route_state_map_.end())
return it->second.get();
return nullptr;
}
void CefMediaRouterManager::RemoveRouteState(
const media_router::MediaRoute::Id& route_id) {
auto it = route_state_map_.find(route_id);
if (it != route_state_map_.end())
route_state_map_.erase(it);
}