1 // Copyright (c) 2012 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.
5 // AudioInputDeviceManager manages the audio input devices. In particular it
6 // communicates with MediaStreamManager and AudioInputRendererHost on the
7 // browser IO thread, handles queries like
8 // enumerate/open/close/GetOpenedDeviceInfoById from MediaStreamManager and
9 // GetOpenedDeviceInfoById from AudioInputRendererHost.
10 // The work for enumerate/open/close is handled asynchronously on Media Stream
11 // device thread, while GetOpenedDeviceInfoById is synchronous on the IO thread.
13 #ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_
14 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_
18 #include "base/basictypes.h"
19 #include "base/memory/ref_counted.h"
20 #include "base/threading/thread.h"
21 #include "content/browser/renderer_host/media/media_stream_provider.h"
22 #include "content/common/content_export.h"
23 #include "content/common/media/media_stream_options.h"
24 #include "content/public/common/media_stream_request.h"
25 #include "media/audio/audio_device_name.h"
33 class CONTENT_EXPORT AudioInputDeviceManager : public MediaStreamProvider {
35 // Calling Start() with this kFakeOpenSessionId will open the default device,
36 // even though Open() has not been called. This is used to be able to use the
37 // AudioInputDeviceManager before MediaStream is implemented.
38 // TODO(xians): Remove it when the webrtc unittest does not need it any more.
39 static const int kFakeOpenSessionId;
41 explicit AudioInputDeviceManager(media::AudioManager* audio_manager);
43 // Gets the opened device info by |session_id|. Returns NULL if the device
44 // is not opened, otherwise the opened device. Called on IO thread.
45 const StreamDeviceInfo* GetOpenedDeviceInfoById(int session_id);
47 // MediaStreamProvider implementation, called on IO thread.
48 virtual void Register(MediaStreamProviderListener* listener,
49 const scoped_refptr<base::SingleThreadTaskRunner>&
50 device_task_runner) OVERRIDE;
51 virtual void Unregister() OVERRIDE;
52 virtual void EnumerateDevices(MediaStreamType stream_type) OVERRIDE;
53 virtual int Open(const StreamDeviceInfo& device) OVERRIDE;
54 virtual void Close(int session_id) OVERRIDE;
57 bool ShouldUseFakeDevice() const;
59 #if defined(OS_CHROMEOS)
60 // Registers and unregisters that a stream using keyboard mic has been opened
61 // or closed. Keeps count of how many such streams are open and activates and
62 // inactivates the keyboard mic accordingly. The (in)activation is done on the
63 // UI thread and for the register case a callback must therefor be provided
64 // which is called when activated.
65 // Called on the IO thread.
66 void RegisterKeyboardMicStream(const base::Closure& callback);
67 void UnregisterKeyboardMicStream();
71 // Used by the unittests to get a list of fake devices.
72 friend class MediaStreamDispatcherHostTest;
73 void GetFakeDeviceNames(media::AudioDeviceNames* device_names);
75 typedef std::vector<StreamDeviceInfo> StreamDeviceList;
76 virtual ~AudioInputDeviceManager();
78 // Enumerates audio input devices on media stream device thread.
79 void EnumerateOnDeviceThread(MediaStreamType stream_type);
80 // Opens the device on media stream device thread.
81 void OpenOnDeviceThread(int session_id, const StreamDeviceInfo& info);
83 // Callback used by EnumerateOnDeviceThread(), called with a list of
84 // enumerated devices on IO thread.
85 void DevicesEnumeratedOnIOThread(MediaStreamType stream_type,
86 scoped_ptr<StreamDeviceInfoArray> devices);
87 // Callback used by OpenOnDeviceThread(), called with the session_id
88 // referencing the opened device on IO thread.
89 void OpenedOnIOThread(int session_id, const StreamDeviceInfo& info);
90 // Callback used by CloseOnDeviceThread(), called with the session_id
91 // referencing the closed device on IO thread.
92 void ClosedOnIOThread(MediaStreamType type, int session_id);
94 // Verifies that the calling thread is media stream device thread.
95 bool IsOnDeviceThread() const;
97 // Helper to return iterator to the device referenced by |session_id|. If no
98 // device is found, it will return devices_.end().
99 StreamDeviceList::iterator GetDevice(int session_id);
101 #if defined(OS_CHROMEOS)
102 // Calls Cras audio handler and sets keyboard mic active status.
103 void SetKeyboardMicStreamActiveOnUIThread(bool active);
106 // Only accessed on Browser::IO thread.
107 MediaStreamProviderListener* listener_;
108 int next_capture_session_id_;
109 bool use_fake_device_;
110 StreamDeviceList devices_;
112 #if defined(OS_CHROMEOS)
113 // Keeps count of how many streams are using keyboard mic.
114 int keyboard_mic_streams_count_;
117 media::AudioManager* const audio_manager_; // Weak.
119 // The message loop of media stream device thread that this object runs on.
120 scoped_refptr<base::SingleThreadTaskRunner> device_task_runner_;
122 DISALLOW_COPY_AND_ASSIGN(AudioInputDeviceManager);
125 } // namespace content
127 #endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_