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Add support for media device discovery and messaging (fixes issue #2900)

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Chromium supports communication with media devices on the local network via
the Cast and DIAL protocols. This takes two primary forms:

1. Messaging, where strings representing state information are passed between
   the client and a dedicated receiver app on the media device. The receiver
   app communicates directly with an app-specific backend service to retrieve
   and possibly control media playback.
2. Tab/desktop mirroring, where the media contents are streamed directly from
   the browser to a generic streaming app on the media device and playback is
   controlled by the browser.

This change adds support for device discovery and messaging (but not
mirroring) with functionality exposed via the new CefMediaRouter interface.

To test: Navigate to http://tests/media_router in cefclient and follow the
on-screen instructions.
This commit is contained in:
Marshall Greenblatt
2020-03-19 11:34:15 -04:00
parent fecd582035
commit 03fd5b15da
69 changed files with 5402 additions and 33 deletions
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20
libcef/browser/browser_context.cc
View File

@ -11,6 +11,7 @@
#include "libcef/browser/context.h"
#include "libcef/browser/download_manager_delegate.h"
#include "libcef/browser/extensions/extension_system.h"
#include "libcef/browser/media_router/media_router_manager.h"
#include "libcef/browser/prefs/browser_prefs.h"
#include "libcef/browser/request_context_impl.h"
#include "libcef/browser/ssl_host_state_delegate.h"
@ -164,6 +165,11 @@ base::LazyInstance<ImplManager>::DestructorAtExit g_manager =
base::LazyInstance<ImplManager>::Leaky g_manager = LAZY_INSTANCE_INITIALIZER;
#endif
CefBrowserContext* GetSelf(base::WeakPtr<CefBrowserContext> self) {
CEF_REQUIRE_UIT();
return self.get();
}
} // namespace
// Creates and manages VisitedLinkEventListener objects for each
@ -220,8 +226,9 @@ class CefVisitedLinkListener : public visitedlink::VisitedLinkWriter::Listener {
};
CefBrowserContext::CefBrowserContext(const CefRequestContextSettings& settings)
: settings_(settings) {
: settings_(settings), weak_ptr_factory_(this) {
g_manager.Get().AddImpl(this);
getter_ = base::BindRepeating(GetSelf, weak_ptr_factory_.GetWeakPtr());
}
CefBrowserContext::~CefBrowserContext() {
@ -233,6 +240,9 @@ CefBrowserContext::~CefBrowserContext() {
// Unregister the context first to avoid re-entrancy during shutdown.
g_manager.Get().RemoveImpl(this, cache_path_);
// Destroy objects that may hold references to the MediaRouter.
media_router_manager_.reset();
// Send notifications to clean up objects associated with this Profile.
MaybeSendDestroyedNotification();
@ -812,3 +822,11 @@ bool CefBrowserContext::IsPrintPreviewSupported() const {
return !GetPrefs()->GetBoolean(prefs::kPrintPreviewDisabled);
}
CefMediaRouterManager* CefBrowserContext::GetMediaRouterManager() {
CEF_REQUIRE_UIT();
if (!media_router_manager_) {
media_router_manager_.reset(new CefMediaRouterManager(this));
}
return media_router_manager_.get();
}