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      1 /*
      2  *  Copyright (c) 2011 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_MAIN_SOURCE_GAIN_CONTROL_IMPL_H_
     12 #define WEBRTC_MODULES_AUDIO_PROCESSING_MAIN_SOURCE_GAIN_CONTROL_IMPL_H_
     13 
     14 #include <vector>
     15 
     16 #include "audio_processing.h"
     17 #include "processing_component.h"
     18 
     19 namespace webrtc {
     20 class AudioProcessingImpl;
     21 class AudioBuffer;
     22 
     23 class GainControlImpl : public GainControl,
     24                         public ProcessingComponent {
     25  public:
     26   explicit GainControlImpl(const AudioProcessingImpl* apm);
     27   virtual ~GainControlImpl();
     28 
     29   int ProcessRenderAudio(AudioBuffer* audio);
     30   int AnalyzeCaptureAudio(AudioBuffer* audio);
     31   int ProcessCaptureAudio(AudioBuffer* audio);
     32 
     33   // ProcessingComponent implementation.
     34   virtual int Initialize();
     35   virtual int get_version(char* version, int version_len_bytes) const;
     36 
     37   // GainControl implementation.
     38   virtual bool is_enabled() const;
     39 
     40  private:
     41   // GainControl implementation.
     42   virtual int Enable(bool enable);
     43   virtual int set_stream_analog_level(int level);
     44   virtual int stream_analog_level();
     45   virtual int set_mode(Mode mode);
     46   virtual Mode mode() const;
     47   virtual int set_target_level_dbfs(int level);
     48   virtual int target_level_dbfs() const;
     49   virtual int set_compression_gain_db(int gain);
     50   virtual int compression_gain_db() const;
     51   virtual int enable_limiter(bool enable);
     52   virtual bool is_limiter_enabled() const;
     53   virtual int set_analog_level_limits(int minimum, int maximum);
     54   virtual int analog_level_minimum() const;
     55   virtual int analog_level_maximum() const;
     56   virtual bool stream_is_saturated() const;
     57 
     58   // ProcessingComponent implementation.
     59   virtual void* CreateHandle() const;
     60   virtual int InitializeHandle(void* handle) const;
     61   virtual int ConfigureHandle(void* handle) const;
     62   virtual int DestroyHandle(void* handle) const;
     63   virtual int num_handles_required() const;
     64   virtual int GetHandleError(void* handle) const;
     65 
     66   const AudioProcessingImpl* apm_;
     67   Mode mode_;
     68   int minimum_capture_level_;
     69   int maximum_capture_level_;
     70   bool limiter_enabled_;
     71   int target_level_dbfs_;
     72   int compression_gain_db_;
     73   std::vector<int> capture_levels_;
     74   int analog_capture_level_;
     75   bool was_analog_level_set_;
     76   bool stream_is_saturated_;
     77 };
     78 }  // namespace webrtc
     79 
     80 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_MAIN_SOURCE_GAIN_CONTROL_IMPL_H_
     81