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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
// Copyright (c) 2012 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.
//
// AudioInputDeviceManager manages the audio input devices. In particular it
// communicates with MediaStreamManager and AudioInputRendererHost on the
// browser IO thread, handles queries like enumerate/open/close from
// MediaStreamManager and start/stop from AudioInputRendererHost.
// The work for enumerate/open/close is handled asynchronously on Media Stream
// device thread, while start/stop are synchronous on the IO thread.
#ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_
#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_
#include <map>
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "base/threading/thread.h"
#include "content/browser/renderer_host/media/media_stream_provider.h"
#include "content/common/content_export.h"
#include "content/common/media/media_stream_options.h"
#include "content/public/common/media_stream_request.h"
namespace media {
class AudioManager;
}
namespace content {
class AudioInputDeviceManagerEventHandler;
class CONTENT_EXPORT AudioInputDeviceManager : public MediaStreamProvider {
public:
// Calling Start() with this kFakeOpenSessionId will open the default device,
// even though Open() has not been called. This is used to be able to use the
// AudioInputDeviceManager before MediaStream is implemented.
static const int kFakeOpenSessionId;
explicit AudioInputDeviceManager(media::AudioManager* audio_manager);
// MediaStreamProvider implementation, called on IO thread.
virtual void Register(MediaStreamProviderListener* listener,
base::MessageLoopProxy* device_thread_loop) OVERRIDE;
virtual void Unregister() OVERRIDE;
virtual void EnumerateDevices() OVERRIDE;
virtual int Open(const StreamDeviceInfo& device) OVERRIDE;
virtual void Close(int session_id) OVERRIDE;
// Functions used by AudioInputRenderHost, called on IO thread.
// Starts the device referenced by the session id.
void Start(int session_id, AudioInputDeviceManagerEventHandler* handler);
// Stops the device referenced by the session id.
void Stop(int session_id);
void UseFakeDevice();
bool ShouldUseFakeDevice() const;
private:
typedef std::map<int, AudioInputDeviceManagerEventHandler*> EventHandlerMap;
typedef std::map<int, StreamDeviceInfo> StreamDeviceMap;
virtual ~AudioInputDeviceManager();
// Enumerates audio input devices on media stream device thread.
void EnumerateOnDeviceThread();
// Opens the device on media stream device thread.
void OpenOnDeviceThread(int session_id, const StreamDeviceInfo& device);
// Closes the deivce on the media stream device thread.
void CloseOnDeviceThread(int session_id);
// Callback used by EnumerateOnDeviceThread(), called with a list of
// enumerated devices on IO thread.
void DevicesEnumeratedOnIOThread(StreamDeviceInfoArray* devices);
// Callback used by OpenOnDeviceThread(), called with the session_id
// referencing the opened device on IO thread.
void OpenedOnIOThread(MediaStreamType type, int session_id);
// Callback used by CloseOnDeviceThread(), called with the session_id
// referencing the closed device on IO thread.
void ClosedOnIOThread(MediaStreamType type, int session_id);
// Verifies that the calling thread is media stream device thread.
bool IsOnDeviceThread() const;
// Only accessed on Browser::IO thread.
MediaStreamProviderListener* listener_;
int next_capture_session_id_;
EventHandlerMap event_handlers_;
bool use_fake_device_;
// Only accessed from media stream device thread.
StreamDeviceMap devices_;
media::AudioManager* const audio_manager_;
// The message loop of media stream device thread that this object runs on.
scoped_refptr<base::MessageLoopProxy> device_loop_;
DISALLOW_COPY_AND_ASSIGN(AudioInputDeviceManager);
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_
|
