Add ability to retrieve capabilities for audio input devices to MediaDevicesDispatcherHost.

content/browser/renderer_host/media/media_devices_dispatcher_host.h

 // Copyright 2016 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_BROWSER_RENDERER_HOST_MEDIA_MEDIA_DEVICES_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_DEVICES_DISPATCHER_HOST_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 38 matching lines @@
 
   // ::mojom::MediaDevicesDispatcherHost implementation.
   void EnumerateDevices(bool request_audio_input,
                         bool request_video_input,
                         bool request_audio_output,
                         const url::Origin& security_origin,
                         EnumerateDevicesCallback client_callback) override;
   void GetVideoInputCapabilities(
       const url::Origin& security_origin,
       GetVideoInputCapabilitiesCallback client_callback) override;
+  void GetAudioInputCapabilities(
+      const url::Origin& security_origin,
+      GetAudioInputCapabilitiesCallback client_callback) override;
   void SubscribeDeviceChangeNotifications(
       MediaDeviceType type,
       uint32_t subscription_id,
       const url::Origin& security_origin) override;
   void UnsubscribeDeviceChangeNotifications(MediaDeviceType type,
                                             uint32_t subscription_id) override;
 
   // MediaDeviceChangeSubscriber implementation.
   void OnDevicesChanged(MediaDeviceType type,
                         const MediaDeviceInfoArray& device_infos) override;
@@ skipping 22 matching lines @@
       const url::Origin& security_origin,
       GetVideoInputCapabilitiesCallback client_callback,
       const std::string& default_device_id);
 
   void FinalizeGetVideoInputCapabilities(
       const url::Origin& security_origin,
       GetVideoInputCapabilitiesCallback client_callback,
       const std::string& default_device_id,
       const media::VideoCaptureDeviceDescriptors& device_descriptors);
 
+  void GotDefaultAudioInputDeviceID(const url::Origin& security_origin,
+                                    const std::string& default_device_id);
+
+  void GotAudioInputEnumeration(const url::Origin& security_origin,
+                                const std::string& default_device_id,
+                                const MediaDeviceEnumeration& enumeration);
+
+  void GotAudioInputParameters(size_t index,
+                               const media::AudioParameters& parameters);
+
+  void FinalizeGetAudioInputCapabilities();
+
   // Returns the currently supported video formats for the given |device_id|.
   media::VideoCaptureFormats GetVideoInputFormats(const std::string& device_id);
 
   struct SubscriptionInfo;
   void NotifyDeviceChangeOnUIThread(
       const std::vector<SubscriptionInfo>& subscriptions,
       MediaDeviceType type,
       const MediaDeviceInfoArray& device_infos);
 
   // The following const fields can be accessed on any thread.
   const int render_process_id_;
   const int render_frame_id_;
   const std::string device_id_salt_;
   const std::string group_id_salt_;
 
   // The following fields can only be accessed on the IO thread.
   MediaStreamManager* media_stream_manager_;
   std::unique_ptr<MediaDevicesPermissionChecker> permission_checker_;
   std::vector<SubscriptionInfo>
       device_change_subscriptions_[NUM_MEDIA_DEVICE_TYPES];
 
   // This field can only be accessed on the UI thread.
   ::mojom::MediaDevicesListenerPtr device_change_listener_;
 
+  // Queued requests for audio-input capabilities.
+  std::vector<GetAudioInputCapabilitiesCallback>
+      pending_audio_input_capabilities_callbacks_;
+  size_t num_pending_audio_input_parameters_;
+  std::vector<::mojom::AudioInputDeviceCapabilities>
+      current_audio_input_capabilities_;
+
   base::WeakPtrFactory<MediaDevicesDispatcherHost> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaDevicesDispatcherHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_DEVICES_DISPATCHER_HOST_H_