content/browser/renderer_host/media/audio_input_device_manager.h

   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.
   4 //
   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.
  12
  13 #ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_
  14 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_
  15
  16 #include <map>
  17
  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"
  26
  27 namespace media {
  28 class AudioManager;
  29 }
  30
  31 namespace content {
  32
  33 class CONTENT_EXPORT AudioInputDeviceManager : public MediaStreamProvider {
  34  public:
  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;
  40
  41   explicit AudioInputDeviceManager(media::AudioManager* audio_manager);
  42
  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);
  46
  47   void Unregister();
  48
  49   // MediaStreamProvider implementation, called on IO thread.
  50   void Register(MediaStreamProviderListener* listener,
  51                 const scoped_refptr<base::SingleThreadTaskRunner>&
  52                     device_task_runner) override;
  53   void EnumerateDevices(MediaStreamType stream_type) override;
  54   int Open(const StreamDeviceInfo& device) override;
  55   void Close(int session_id) override;
  56
  57   void UseFakeDevice();
  58   bool ShouldUseFakeDevice() const;
  59
  60 #if defined(OS_CHROMEOS)
  61   // Registers and unregisters that a stream using keyboard mic has been opened
  62   // or closed. Keeps count of how many such streams are open and activates and
  63   // inactivates the keyboard mic accordingly. The (in)activation is done on the
  64   // UI thread and for the register case a callback must therefor be provided
  65   // which is called when activated.
  66   // Called on the IO thread.
  67   void RegisterKeyboardMicStream(const base::Closure& callback);
  68   void UnregisterKeyboardMicStream();
  69 #endif
  70
  71  private:
  72   // Used by the unittests to get a list of fake devices.
  73   friend class MediaStreamDispatcherHostTest;
  74   void GetFakeDeviceNames(media::AudioDeviceNames* device_names);
  75
  76   typedef std::vector<StreamDeviceInfo> StreamDeviceList;
  77   ~AudioInputDeviceManager() override;
  78
  79   // Enumerates audio input devices on media stream device thread.
  80   void EnumerateOnDeviceThread(MediaStreamType stream_type);
  81   // Opens the device on media stream device thread.
  82   void OpenOnDeviceThread(int session_id, const StreamDeviceInfo& info);
  83
  84   // Callback used by EnumerateOnDeviceThread(), called with a list of
  85   // enumerated devices on IO thread.
  86   void DevicesEnumeratedOnIOThread(MediaStreamType stream_type,
  87                                    scoped_ptr<StreamDeviceInfoArray> devices);
  88   // Callback used by OpenOnDeviceThread(), called with the session_id
  89   // referencing the opened device on IO thread.
  90   void OpenedOnIOThread(int session_id, const StreamDeviceInfo& info);
  91   // Callback used by CloseOnDeviceThread(), called with the session_id
  92   // referencing the closed device on IO thread.
  93   void ClosedOnIOThread(MediaStreamType type, int session_id);
  94
  95   // Verifies that the calling thread is media stream device thread.
  96   bool IsOnDeviceThread() const;
  97
  98   // Helper to return iterator to the device referenced by |session_id|. If no
  99   // device is found, it will return devices_.end().
 100   StreamDeviceList::iterator GetDevice(int session_id);
 101
 102 #if defined(OS_CHROMEOS)
 103   // Calls Cras audio handler and sets keyboard mic active status.
 104   void SetKeyboardMicStreamActiveOnUIThread(bool active);
 105 #endif
 106
 107   // Only accessed on Browser::IO thread.
 108   MediaStreamProviderListener* listener_;
 109   int next_capture_session_id_;
 110   bool use_fake_device_;
 111   StreamDeviceList devices_;
 112
 113 #if defined(OS_CHROMEOS)
 114   // Keeps count of how many streams are using keyboard mic.
 115   int keyboard_mic_streams_count_;
 116 #endif
 117
 118   media::AudioManager* const audio_manager_;  // Weak.
 119
 120   // The message loop of media stream device thread that this object runs on.
 121   scoped_refptr<base::SingleThreadTaskRunner> device_task_runner_;
 122
 123   DISALLOW_COPY_AND_ASSIGN(AudioInputDeviceManager);
 124 };
 125
 126 }  // namespace content
 127
 128 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_