chrome/browser/media/router/presentation_session_messages_observer.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_MEDIA_ROUTER_PRESENTATION_SESSION_MESSAGES_OBSERVER_H_
   6 #define CHROME_BROWSER_MEDIA_ROUTER_PRESENTATION_SESSION_MESSAGES_OBSERVER_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/scoped_vector.h"
  10 #include "chrome/browser/media/router/media_route.h"
  11 #include "content/public/browser/presentation_service_delegate.h"
  12 #include "content/public/browser/presentation_session.h"
  13
  14 namespace media_router {
  15
  16 class MediaRouter;
  17
  18 // Observes messages originating from the MediaSink connected to a MediaRoute
  19 // that represents a presentation.
  20 // Messages are received from MediaRouter via |OnMessagesReceived|, where
  21 // |message_cb_| will be invoked.
  22 class PresentationSessionMessagesObserver {
  23  public:
  24   // |message_cb|: The callback to invoke whenever messages are received.
  25   // |route_id|: ID of MediaRoute to listen for messages.
  26   PresentationSessionMessagesObserver(
  27       const content::PresentationSessionMessageCallback& message_cb,
  28       const MediaRoute::Id& route_id,
  29       MediaRouter* router);
  30   ~PresentationSessionMessagesObserver();
  31
  32   // Invoked by |router_| whenever messages are received. Invokes |message_cb_|
  33   // with |messages|.
  34   // |messages| is guaranteed to be non-empty.
  35   // If |pass_ownership| is true, then this observer may reuse buffers from the
  36   // contents of |messages| without copying.
  37   void OnMessagesReceived(
  38       const ScopedVector<content::PresentationSessionMessage>& messages,
  39       bool pass_ownership);
  40
  41   const MediaRoute::Id& route_id() const { return route_id_; }
  42
  43  private:
  44   content::PresentationSessionMessageCallback message_cb_;
  45   const MediaRoute::Id route_id_;
  46   MediaRouter* const router_;
  47
  48   DISALLOW_COPY_AND_ASSIGN(PresentationSessionMessagesObserver);
  49 };
  50
  51 }  // namespace media_router
  52
  53 #endif  // CHROME_BROWSER_MEDIA_ROUTER_PRESENTATION_SESSION_MESSAGES_OBSERVER_H_