cef/libcef/browser/media_router/media_router_impl.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_impl.h"
#include "libcef/browser/media_router/media_route_impl.h"
#include "libcef/browser/media_router/media_router_manager.h"
#include "libcef/browser/media_router/media_sink_impl.h"
#include "libcef/browser/media_router/media_source_impl.h"
#include "libcef/browser/thread_util.h"
namespace {
// Do not keep a reference to the object returned by this method.
CefBrowserContext* GetBrowserContext(const CefBrowserContext::Getter& getter) {
CEF_REQUIRE_UIT();
DCHECK(!getter.is_null());
// Will return nullptr if the BrowserContext has been shut down.
return getter.Run();
}
} // namespace
class CefRegistrationImpl : public CefRegistration,
public CefMediaRouterManager::Observer {
public:
explicit CefRegistrationImpl(CefRefPtr<CefMediaObserver> observer)
: observer_(observer) {
DCHECK(observer_);
}
CefRegistrationImpl(const CefRegistrationImpl&) = delete;
CefRegistrationImpl& operator=(const CefRegistrationImpl&) = delete;
~CefRegistrationImpl() override {
CEF_REQUIRE_UIT();
// May be null if OnMediaRouterDestroyed was called.
if (browser_context_getter_.is_null())
return;
auto browser_context = GetBrowserContext(browser_context_getter_);
if (!browser_context)
return;
browser_context->GetMediaRouterManager()->RemoveObserver(this);
}
void Initialize(const CefBrowserContext::Getter& browser_context_getter) {
CEF_REQUIRE_UIT();
DCHECK(!browser_context_getter.is_null());
DCHECK(browser_context_getter_.is_null());
browser_context_getter_ = browser_context_getter;
auto browser_context = GetBrowserContext(browser_context_getter_);
if (!browser_context)
return;
browser_context->GetMediaRouterManager()->AddObserver(this);
}
private:
// CefMediaRouterManager::Observer methods:
void OnMediaRouterDestroyed() override { browser_context_getter_.Reset(); }
void OnMediaSinks(
const CefMediaRouterManager::MediaSinkVector& sinks) override {
std::vector<CefRefPtr<CefMediaSink>> cef_sinks;
for (const auto& sink : sinks) {
cef_sinks.push_back(new CefMediaSinkImpl(sink.sink));
}
observer_->OnSinks(cef_sinks);
}
void OnMediaRoutes(
const CefMediaRouterManager::MediaRouteVector& routes) override {
std::vector<CefRefPtr<CefMediaRoute>> cef_routes;
for (const auto& route : routes) {
cef_routes.push_back(MakeCefRoute(route));
}
observer_->OnRoutes(cef_routes);
}
void OnMediaRouteMessages(
const media_router::MediaRoute& route,
const CefMediaRouterManager::MediaMessageVector& messages) override {
CefRefPtr<CefMediaRoute> cef_route = MakeCefRoute(route);
for (const auto& message : messages) {
if (message->type == media_router::mojom::RouteMessage::Type::TEXT) {
if (message->message.has_value()) {
const std::string& str = *(message->message);
observer_->OnRouteMessageReceived(cef_route, str.c_str(), str.size());
}
} else if (message->type ==
media_router::mojom::RouteMessage::Type::BINARY) {
if (message->data.has_value()) {
const std::vector<uint8_t>& data = *(message->data);
observer_->OnRouteMessageReceived(cef_route, data.data(),
data.size());
}
}
}
}
void OnMediaRouteStateChange(
const media_router::MediaRoute& route,
const content::PresentationConnectionStateChangeInfo& info) override {
observer_->OnRouteStateChanged(MakeCefRoute(route),
ToConnectionState(info.state));
}
CefRefPtr<CefMediaRoute> MakeCefRoute(const media_router::MediaRoute& route) {
return new CefMediaRouteImpl(route, browser_context_getter_);
}
static CefMediaObserver::ConnectionState ToConnectionState(
blink::mojom::PresentationConnectionState state) {
switch (state) {
case blink::mojom::PresentationConnectionState::CONNECTING:
return CEF_MRCS_CONNECTING;
case blink::mojom::PresentationConnectionState::CONNECTED:
return CEF_MRCS_CONNECTED;
case blink::mojom::PresentationConnectionState::CLOSED:
return CEF_MRCS_CLOSED;
case blink::mojom::PresentationConnectionState::TERMINATED:
return CEF_MRCS_TERMINATED;
}
NOTREACHED();
return CEF_MRCS_UNKNOWN;
}
CefRefPtr<CefMediaObserver> observer_;
CefBrowserContext::Getter browser_context_getter_;
IMPLEMENT_REFCOUNTING_DELETE_ON_UIT(CefRegistrationImpl);
};
CefMediaRouterImpl::CefMediaRouterImpl() = default;
void CefMediaRouterImpl::Initialize(
const CefBrowserContext::Getter& browser_context_getter,
CefRefPtr<CefCompletionCallback> callback) {
CEF_REQUIRE_UIT();
DCHECK(!initialized_);
DCHECK(!browser_context_getter.is_null());
DCHECK(browser_context_getter_.is_null());
browser_context_getter_ = browser_context_getter;
initialized_ = true;
if (!init_callbacks_.empty()) {
for (auto& callback : init_callbacks_) {
std::move(callback).Run();
}
init_callbacks_.clear();
}
if (callback) {
// Execute client callback asynchronously for consistency.
CEF_POST_TASK(CEF_UIT, base::BindOnce(&CefCompletionCallback::OnComplete,
callback.get()));
}
}
CefRefPtr<CefRegistration> CefMediaRouterImpl::AddObserver(
CefRefPtr<CefMediaObserver> observer) {
if (!observer)
return nullptr;
CefRefPtr<CefRegistrationImpl> registration =
new CefRegistrationImpl(observer);
StoreOrTriggerInitCallback(base::BindOnce(
&CefMediaRouterImpl::InitializeRegistrationInternal, this, registration));
return registration.get();
}
CefRefPtr<CefMediaSource> CefMediaRouterImpl::GetSource(const CefString& urn) {
if (urn.empty())
return nullptr;
// Check for a valid URL and supported Cast/DIAL schemes.
GURL presentation_url(urn.ToString());
if (!media_router::IsValidPresentationUrl(presentation_url)) {
return nullptr;
}
if (presentation_url.SchemeIsHTTPOrHTTPS()) {
// We don't support tab/desktop mirroring, which is what Cast uses for
// arbitrary HTTP/HTTPS URLs (see CastMediaSource).
return nullptr;
}
return new CefMediaSourceImpl(presentation_url);
}
void CefMediaRouterImpl::NotifyCurrentSinks() {
StoreOrTriggerInitCallback(
base::BindOnce(&CefMediaRouterImpl::NotifyCurrentSinksInternal, this));
}
void CefMediaRouterImpl::CreateRoute(
CefRefPtr<CefMediaSource> source,
CefRefPtr<CefMediaSink> sink,
CefRefPtr<CefMediaRouteCreateCallback> callback) {
StoreOrTriggerInitCallback(base::BindOnce(
&CefMediaRouterImpl::CreateRouteInternal, this, source, sink, callback));
}
void CefMediaRouterImpl::NotifyCurrentRoutes() {
StoreOrTriggerInitCallback(
base::BindOnce(&CefMediaRouterImpl::NotifyCurrentRoutesInternal, this));
}
void CefMediaRouterImpl::InitializeRegistrationInternal(
CefRefPtr<CefRegistrationImpl> registration) {
DCHECK(ValidContext());
registration->Initialize(browser_context_getter_);
}
void CefMediaRouterImpl::NotifyCurrentSinksInternal() {
DCHECK(ValidContext());
auto browser_context = GetBrowserContext(browser_context_getter_);
if (!browser_context)
return;
browser_context->GetMediaRouterManager()->NotifyCurrentSinks();
}
void CefMediaRouterImpl::CreateRouteInternal(
CefRefPtr<CefMediaSource> source,
CefRefPtr<CefMediaSink> sink,
CefRefPtr<CefMediaRouteCreateCallback> callback) {
DCHECK(ValidContext());
std::string error;
auto browser_context = GetBrowserContext(browser_context_getter_);
if (!browser_context) {
error = "Context is not valid";
} else if (!source) {
error = "Source is empty or invalid";
} else if (!sink) {
error = "Sink is empty or invalid";
} else if (!sink->IsCompatibleWith(source)) {
error = "Sink is not compatible with source";
}
if (!error.empty()) {
LOG(WARNING) << "Media route creation failed: " << error;
if (callback) {
callback->OnMediaRouteCreateFinished(CEF_MRCR_UNKNOWN_ERROR, error,
nullptr);
}
return;
}
auto source_impl = static_cast<CefMediaSourceImpl*>(source.get());
auto sink_impl = static_cast<CefMediaSinkImpl*>(sink.get());
browser_context->GetMediaRouterManager()->CreateRoute(
source_impl->source().id(), sink_impl->sink().id(), url::Origin(),
base::BindOnce(&CefMediaRouterImpl::CreateRouteCallback, this, callback));
}
void CefMediaRouterImpl::NotifyCurrentRoutesInternal() {
DCHECK(ValidContext());
auto browser_context = GetBrowserContext(browser_context_getter_);
if (!browser_context)
return;
browser_context->GetMediaRouterManager()->NotifyCurrentRoutes();
}
void CefMediaRouterImpl::CreateRouteCallback(
CefRefPtr<CefMediaRouteCreateCallback> callback,
const media_router::RouteRequestResult& result) {
DCHECK(ValidContext());
if (result.result_code() != media_router::mojom::RouteRequestResultCode::OK) {
LOG(WARNING) << "Media route creation failed: " << result.error() << " ("
<< result.result_code() << ")";
}
if (!callback)
return;
CefRefPtr<CefMediaRoute> route;
if (result.result_code() == media_router::mojom::RouteRequestResultCode::OK &&
result.route()) {
route = new CefMediaRouteImpl(*result.route(), browser_context_getter_);
}
callback->OnMediaRouteCreateFinished(
static_cast<cef_media_route_create_result_t>(result.result_code()),
result.error(), route);
}
void CefMediaRouterImpl::StoreOrTriggerInitCallback(
base::OnceClosure callback) {
if (!CEF_CURRENTLY_ON_UIT()) {
CEF_POST_TASK(
CEF_UIT, base::BindOnce(&CefMediaRouterImpl::StoreOrTriggerInitCallback,
this, std::move(callback)));
return;
}
if (initialized_) {
std::move(callback).Run();
} else {
init_callbacks_.emplace_back(std::move(callback));
}
}
bool CefMediaRouterImpl::ValidContext() const {
return CEF_CURRENTLY_ON_UIT() && initialized_;
}
// CefMediaRouter methods ------------------------------------------------------
// static
CefRefPtr<CefMediaRouter> CefMediaRouter::GetGlobalMediaRouter(
CefRefPtr<CefCompletionCallback> callback) {
return CefRequestContext::GetGlobalContext()->GetMediaRouter(callback);
}