blob: da9f517967fce9f322c9569b61bb961212ccfeb8 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
// 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_MEDIA_SINKS_OBSERVER_H_
#define CHROME_BROWSER_MEDIA_ROUTER_MEDIA_SINKS_OBSERVER_H_
#include <vector>
#include "base/macros.h"
#include "chrome/browser/media/router/media_sink.h"
#include "chrome/browser/media/router/media_source.h"
namespace media_router {
class MediaRouter;
// Base class for observing when the collection of sinks compatible with
// a MediaSource has been updated.
// A MediaSinksObserver implementation can be registered to MediaRouter to
// receive results. It can then interpret / process the results accordingly.
// More documentation can be found at
// docs.google.com/document/d/1RDXdzi2y7lRuL08HAe-qlSJG2DMz2iH3gBzMs0IRR78
class MediaSinksObserver {
public:
// Constructs an observer that will observe for sinks compatible
// with |source|.
MediaSinksObserver(MediaRouter* router, const MediaSource& source);
virtual ~MediaSinksObserver();
// Registers with MediaRouter to start observing. Must be called before the
// observer will start receiving updates. Returns |true| if the observer is
// initialized. This method is no-op if the observer is already initialized.
bool Init();
// This function is invoked when the list of sinks compatible
// with |source_| has been updated.
// Implementations may not perform operations that modify the Media Router's
// observer list. In particular, invoking this observer's destructor within
// OnSinksReceived will result in undefined behavior.
virtual void OnSinksReceived(const std::vector<MediaSink>& sinks) {}
const MediaSource& source() const { return source_; }
private:
const MediaSource source_;
MediaRouter* router_;
bool initialized_;
DISALLOW_COPY_AND_ASSIGN(MediaSinksObserver);
};
} // namespace media_router
#endif // CHROME_BROWSER_MEDIA_ROUTER_MEDIA_SINKS_OBSERVER_H_
|
