Reduce power logging and UMA stats when AGC is disabled

media/audio/audio_input_controller.h

 // 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.
 
 #ifndef MEDIA_AUDIO_AUDIO_INPUT_CONTROLLER_H_
 #define MEDIA_AUDIO_AUDIO_INPUT_CONTROLLER_H_
 
 #include <string>
 #include "base/atomicops.h"
 #include "base/callback.h"
@@ skipping 170 matching lines @@
   // The audio device will be created on the audio thread, and when that is
   // done, the event handler will receive an OnCreated() call from that same
   // thread. |user_input_monitor| is used for typing detection and can be NULL.
   static scoped_refptr<AudioInputController> CreateLowLatency(
       AudioManager* audio_manager,
       EventHandler* event_handler,
       const AudioParameters& params,
       const std::string& device_id,
       // External synchronous writer for audio controller.
       SyncWriter* sync_writer,
-      UserInputMonitor* user_input_monitor);
+      UserInputMonitor* user_input_monitor,
+      const bool agc_is_enabled);
 
   // Factory method for creating an AudioInputController with an existing
   // |stream| for low-latency mode, taking ownership of |stream|. The stream
   // will be opened on the audio thread, and when that is done, the event
   // handler will receive an OnCreated() call from that same thread.
   // |user_input_monitor| is used for typing detection and can be NULL.
   static scoped_refptr<AudioInputController> CreateForStream(
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
       EventHandler* event_handler,
       AudioInputStream* stream,
@@ skipping 12 matching lines @@
   // is called.
   // It is safe to call this method more than once. Calls after the first one
   // will have no effect.
   // This method trampolines to the audio thread.
   virtual void Close(const base::Closure& closed_task);
 
   // Sets the capture volume of the input stream. The value 0.0 corresponds
   // to muted and 1.0 to maximum volume.
   virtual void SetVolume(double volume);
 
-  // Sets the Automatic Gain Control (AGC) state of the input stream.
-  // Changing the AGC state is not supported while recording is active.
-  virtual void SetAutomaticGainControl(bool enabled);
-
   // AudioInputCallback implementation. Threading details depends on the
   // device-specific implementation.
   virtual void OnData(AudioInputStream* stream,
                       const AudioBus* source,
                       uint32 hardware_delay_bytes,
                       double volume) override;
   virtual void OnError(AudioInputStream* stream) override;
 
   bool SharedMemoryAndSyncSocketMode() const { return sync_writer_ != NULL; }
 
@@ skipping 22 matching lines @@
     SILENCE_STATE_NO_MEASUREMENT = 0,
     SILENCE_STATE_ONLY_AUDIO = 1,
     SILENCE_STATE_ONLY_SILENCE = 2,
     SILENCE_STATE_AUDIO_AND_SILENCE = 3,
     SILENCE_STATE_MAX = SILENCE_STATE_AUDIO_AND_SILENCE
   };
 #endif
 
   AudioInputController(EventHandler* handler,
                        SyncWriter* sync_writer,
-                       UserInputMonitor* user_input_monitor);
+                       UserInputMonitor* user_input_monitor,
+                       const bool agc_is_enabled);
   virtual ~AudioInputController();
 
   // Methods called on the audio thread (owned by the AudioManager).
   void DoCreate(AudioManager* audio_manager,
                 const AudioParameters& params,
                 const std::string& device_id);
   void DoCreateForLowLatency(AudioManager* audio_manager,
                              const AudioParameters& params,
                              const std::string& device_id);
   void DoCreateForStream(AudioInputStream* stream_to_control);
   void DoRecord();
   void DoClose();
   void DoReportError();
   void DoSetVolume(double volume);
-  void DoSetAutomaticGainControl(bool enabled);
   void DoOnData(scoped_ptr<AudioBus> data);
   void DoLogAudioLevels(float level_dbfs, int microphone_volume_percent);
 
   // Method to check if we get recorded data after a stream was started,
   // and log the result to UMA.
   void FirstCheckForNoData();
 
   // Method which ensures that OnError() is triggered when data recording
   // times out. Called on the audio thread.
   void DoCheckForNoData();
@@ skipping 48 matching lines @@
 
   // SyncWriter is used only in low-latency mode for synchronous writing.
   SyncWriter* sync_writer_;
 
   static Factory* factory_;
 
   double max_volume_;
 
   UserInputMonitor* user_input_monitor_;
 
+  const bool agc_is_enabled_;
+
 #if defined(AUDIO_POWER_MONITORING)
   // Enabled in DoCrete() but not in DoCreateForStream().
   bool power_measurement_is_enabled_;
 
   // Updated each time a power measurement is performed.
   base::TimeTicks last_audio_level_log_time_;
 
   // Whether the silence state should sent as UMA stat.
   bool log_silence_state_;
 
   // The silence report sent as UMA stat at the end of a session.
   SilenceState silence_state_;
 #endif
 
   size_t prev_key_down_count_;
 
   // Time when a low-latency stream is created.
   base::TimeTicks low_latency_create_time_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioInputController);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_INPUT_CONTROLLER_H_