Index: chrome/browser/media/router/media_sink_service.h |
diff --git a/chrome/browser/media/router/media_sink_service.h b/chrome/browser/media/router/media_sink_service.h |
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+// Copyright 2017 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 CHROME_BROWSER_MEDIA_ROUTER_MEDIA_SINK_SERVICE_H_ |
+#define CHROME_BROWSER_MEDIA_ROUTER_MEDIA_SINK_SERVICE_H_ |
+ |
+#include <memory> |
+#include <vector> |
+ |
+#include "base/callback.h" |
+#include "chrome/browser/media/router/media_sink.h" |
+ |
+namespace media_router { |
+ |
+class MediaSinksObserver; |
+ |
+// A service which can be used to start background discovery and resolution of |
+// MediaSinks. Often these are remote devices, like Chromecast. In addition, the |
+// service is capable of answering MediaSink queries using the sinks that it |
+// generated. |
+// This class is not thread safe. All methods must be called from the IO thread. |
+class MediaSinkService { |
+ public: |
+ // Callback to be invoked when this class finishes sink discovering. |
+ // Arg 0: Sinks discovered and resolved by the service. |
+ using OnSinksDiscoveredCallback = |
+ base::Callback<void(const std::vector<MediaSink>&)>; |
+ |
+ explicit MediaSinkService( |
+ const OnSinksDiscoveredCallback& sinks_discovered_callback); |
+ |
+ virtual ~MediaSinkService(); |
+ |
+ // Starts sink discovery. No-ops if already started. |
+ // Sinks discovered and resolved are continuously passed to |
+ // |callback|. |
+ virtual void Start() = 0; |
+ |
+ // Adds a sink query to observe for MediaSink updates. |
+ // Multiple observers can be added for a given MediaSource. |
+ // Start() must be called first. This class does not take |
+ // ownership of |observer|. |
+ virtual void AddSinkQuery(MediaSinksObserver* observer) = 0; |
+ |
+ // Removes a sink query and stops observing MediaSink updates. No-op if |
+ // |observer| is not registered with this class. |
+ virtual void RemoveSinkQuery(MediaSinksObserver* observer) = 0; |
+ |
+ protected: |
+ OnSinksDiscoveredCallback sinks_discovered_callback_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(MediaSinkService); |
+}; |
+ |
+} // namespace media_router |
+ |
+#endif // CHROME_BROWSER_MEDIA_ROUTER_MEDIA_SINK_SERVICE_H_ |