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// Copyright 2015 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_PRESENTATION_MEDIA_SINKS_OBSERVER_H_
#define CHROME_BROWSER_MEDIA_ROUTER_PRESENTATION_MEDIA_SINKS_OBSERVER_H_
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "chrome/browser/media/router/media_sinks_observer.h"
#include "content/public/browser/presentation_service_delegate.h"
namespace content {
class PresentationScreenAvailabilityListener;
}
namespace media_router {
class MediaRouter;
class MediaSource;
// Receives SinkQueryResults for |source| from |router| and propagates results
// to |listener|. |listener| is notified only when availability status has
// changed, i.e. sinks have become available or sinks are no longer available.
class PresentationMediaSinksObserver : public MediaSinksObserver {
public:
// |router|: Media router that publishes sink query results.
// |listener|: Notified when sinks availability changes.
// |source|: Filters available sink.
// Does not take ownership of |listener| or |router|.
PresentationMediaSinksObserver(
MediaRouter* router,
content::PresentationScreenAvailabilityListener* listener,
const MediaSource& source);
~PresentationMediaSinksObserver() override;
// MediaSinksObserver implementation.
void OnSinksReceived(const std::vector<MediaSink>& result) override;
content::PresentationScreenAvailabilityListener* listener() const {
return listener_;
}
private:
enum Availability { UNKNOWN, AVAILABLE, UNAVAILABLE };
content::PresentationScreenAvailabilityListener* listener_;
Availability previous_availablity_;
DISALLOW_COPY_AND_ASSIGN(PresentationMediaSinksObserver);
};
} // namespace media_router
#endif // CHROME_BROWSER_MEDIA_ROUTER_PRESENTATION_MEDIA_SINKS_OBSERVER_H_
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