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      1 /*
      2  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_GAIN_CONTROL_IMPL_H_
     12 #define WEBRTC_MODULES_AUDIO_PROCESSING_GAIN_CONTROL_IMPL_H_
     13 
     14 #include <vector>
     15 
     16 #include "webrtc/modules/audio_processing/include/audio_processing.h"
     17 #include "webrtc/modules/audio_processing/processing_component.h"
     18 
     19 namespace webrtc {
     20 
     21 class AudioBuffer;
     22 class CriticalSectionWrapper;
     23 
     24 class GainControlImpl : public GainControl,
     25                         public ProcessingComponent {
     26  public:
     27   GainControlImpl(const AudioProcessing* apm,
     28                   CriticalSectionWrapper* crit);
     29   virtual ~GainControlImpl();
     30 
     31   int ProcessRenderAudio(AudioBuffer* audio);
     32   int AnalyzeCaptureAudio(AudioBuffer* audio);
     33   int ProcessCaptureAudio(AudioBuffer* audio);
     34 
     35   // ProcessingComponent implementation.
     36   virtual int Initialize() OVERRIDE;
     37 
     38   // GainControl implementation.
     39   virtual bool is_enabled() const OVERRIDE;
     40   virtual int stream_analog_level() OVERRIDE;
     41 
     42  private:
     43   // GainControl implementation.
     44   virtual int Enable(bool enable) OVERRIDE;
     45   virtual int set_stream_analog_level(int level) OVERRIDE;
     46   virtual int set_mode(Mode mode) OVERRIDE;
     47   virtual Mode mode() const OVERRIDE;
     48   virtual int set_target_level_dbfs(int level) OVERRIDE;
     49   virtual int target_level_dbfs() const OVERRIDE;
     50   virtual int set_compression_gain_db(int gain) OVERRIDE;
     51   virtual int compression_gain_db() const OVERRIDE;
     52   virtual int enable_limiter(bool enable) OVERRIDE;
     53   virtual bool is_limiter_enabled() const OVERRIDE;
     54   virtual int set_analog_level_limits(int minimum, int maximum) OVERRIDE;
     55   virtual int analog_level_minimum() const OVERRIDE;
     56   virtual int analog_level_maximum() const OVERRIDE;
     57   virtual bool stream_is_saturated() const OVERRIDE;
     58 
     59   // ProcessingComponent implementation.
     60   virtual void* CreateHandle() const OVERRIDE;
     61   virtual int InitializeHandle(void* handle) const OVERRIDE;
     62   virtual int ConfigureHandle(void* handle) const OVERRIDE;
     63   virtual void DestroyHandle(void* handle) const OVERRIDE;
     64   virtual int num_handles_required() const OVERRIDE;
     65   virtual int GetHandleError(void* handle) const OVERRIDE;
     66 
     67   const AudioProcessing* apm_;
     68   CriticalSectionWrapper* crit_;
     69   Mode mode_;
     70   int minimum_capture_level_;
     71   int maximum_capture_level_;
     72   bool limiter_enabled_;
     73   int target_level_dbfs_;
     74   int compression_gain_db_;
     75   std::vector<int> capture_levels_;
     76   int analog_capture_level_;
     77   bool was_analog_level_set_;
     78   bool stream_is_saturated_;
     79 };
     80 }  // namespace webrtc
     81 
     82 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_GAIN_CONTROL_IMPL_H_
     83