Implement HasInputDevices in CrasAudioManager

chromeos/audio/cras_audio_handler.cc

 // Copyright (c) 2013 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.
 
 #include "chromeos/audio/cras_audio_handler.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/bind.h"
@@ skipping 885 matching lines @@
     } else {
       // ditto input node case.
       if (!active_output_node_id_ || hotplug_output_nodes.empty() ||
           IsNodeInTheList(output_devices_pq_.top().id, hotplug_output_nodes)) {
         SwitchToDevice(output_devices_pq_.top(), true);
       }
     }
   }
 }
 
+void CrasAudioHandler::UpdateAudioManagerHasInputDevices() {
+  AudioDeviceList devices;
+  GetAudioDevices(&devices);
+  for (size_t i = 0; i < devices.size(); ++i) {
+    if (devices[i].is_input && devices[i].is_for_simple_usage) {
+      media::AudioManager::Get()->SetHasInputDevices(true);
+      return;
+    }
+  }
+  media::AudioManager::Get()->SetHasInputDevices(false);
+}
+
 void CrasAudioHandler::HandleGetNodes(const chromeos::AudioNodeList& node_list,
                                       bool success) {
   if (!success) {
     LOG_IF(ERROR, log_errors_) << "Failed to retrieve audio nodes data";
     return;
   }
 
   UpdateDevicesAndSwitchActive(node_list);
+  UpdateAudioManagerHasInputDevices();
   FOR_EACH_OBSERVER(AudioObserver, observers_, OnAudioNodesChanged());
 }
 
 void CrasAudioHandler::HandleGetNodesError(const std::string& error_name,
                                            const std::string& error_msg) {
   LOG_IF(ERROR, log_errors_) << "Failed to call GetNodes: "
       << error_name  << ": " << error_msg;
 }
 
 void CrasAudioHandler::AddAdditionalActiveNode(uint64_t node_id, bool notify) {
@@ skipping 46 matching lines @@
       active_output_node_id_ = 0;
     chromeos::DBusThreadManager::Get()
         ->GetCrasAudioClient()
         ->RemoveActiveOutputNode(node_id);
     if (notify)
       NotifyActiveNodeChanged(false);
   }
 }
 
 }  // namespace chromeos