blob: c702366321e2c1c27ffbabf06f7efe4a7a977b3a (
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
56
57
58
59
60
61
62
63
64
65
66
|
// Copyright 2014 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 CONTENT_RENDERER_MEDIA_MEDIA_STREAM_H_
#define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_H_
#include <string>
#include <vector>
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/threading/thread_checker.h"
#include "content/common/content_export.h"
#include "third_party/WebKit/public/platform/WebMediaStream.h"
namespace content {
// MediaStreamObserver can be used to get notifications of when a track is
// added or removed from a MediaStream.
class MediaStreamObserver {
public:
// TrackAdded is called |track| is added to the observed MediaStream.
virtual void TrackAdded(const blink::WebMediaStreamTrack& track) = 0;
// TrackRemoved is called |track| is added to the observed MediaStream.
virtual void TrackRemoved(const blink::WebMediaStreamTrack& track) = 0;
protected:
virtual ~MediaStreamObserver() {}
};
// MediaStream is the Chrome representation of blink::WebMediaStream.
// It is owned by blink::WebMediaStream as blink::WebMediaStream::ExtraData.
// Its lifetime is the same as the blink::WebMediaStream instance it belongs to.
class CONTENT_EXPORT MediaStream
: NON_EXPORTED_BASE(public blink::WebMediaStream::ExtraData) {
public:
MediaStream();
~MediaStream() override;
// Returns an instance of MediaStream. This method will never return NULL.
static MediaStream* GetMediaStream(
const blink::WebMediaStream& stream);
// Adds an observer to this MediaStream. Its the callers responsibility to
// remove the observer before the destruction of the MediaStream.
void AddObserver(MediaStreamObserver* observer);
void RemoveObserver(MediaStreamObserver* observer);
// Called by MediaStreamCenter when a track has been added to a stream stream.
bool AddTrack(const blink::WebMediaStreamTrack& track);
// Called by MediaStreamCenter when a track has been removed from |stream|.
bool RemoveTrack(const blink::WebMediaStreamTrack& track);
private:
base::ThreadChecker thread_checker_;
std::vector<MediaStreamObserver*> observers_;
DISALLOW_COPY_AND_ASSIGN(MediaStream);
};
} // namespace content
#endif // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_H_
|
