Removed the dependency in GainControlImpl on the ProcessingComponent class

webrtc/modules/audio_processing/gain_control_impl.h

Index: webrtc/modules/audio_processing/gain_control_impl.h
diff --git a/webrtc/modules/audio_processing/gain_control_impl.h b/webrtc/modules/audio_processing/gain_control_impl.h
index 942a1835e445ed48969d2f97ecedf2c1109cef01..54b8ea79209e88e72b31aa43f38f8bd20b04131c 100644
--- a/webrtc/modules/audio_processing/gain_control_impl.h
+++ b/webrtc/modules/audio_processing/gain_control_impl.h
@@ -14,6 +14,7 @@
 #include <memory>
 #include <vector>
 
+#include "webrtc/base/constructormagic.h"
 #include "webrtc/base/criticalsection.h"
 #include "webrtc/base/thread_annotations.h"
 #include "webrtc/common_audio/swap_queue.h"
@@ -24,20 +25,18 @@ namespace webrtc {
 
 class AudioBuffer;
 
-class GainControlImpl : public GainControl,
-                        public ProcessingComponent {
+class GainControlImpl : public GainControl {
  public:
   GainControlImpl(const AudioProcessing* apm,
                   rtc::CriticalSection* crit_render,
                   rtc::CriticalSection* crit_capture);
-  virtual ~GainControlImpl();
+  ~GainControlImpl() override;
 
   int ProcessRenderAudio(AudioBuffer* audio);
   int AnalyzeCaptureAudio(AudioBuffer* audio);
   int ProcessCaptureAudio(AudioBuffer* audio);
 
-  // ProcessingComponent implementation.
-  int Initialize() override;
+  void Initialize();
 
   // GainControl implementation.
   bool is_enabled() const override;
@@ -49,6 +48,8 @@ class GainControlImpl : public GainControl,
   void ReadQueuedRenderData();
 
  private:
+  class GainController;
+
   // GainControl implementation.
   int Enable(bool enable) override;
   int set_stream_analog_level(int level) override;
@@ -63,15 +64,10 @@ class GainControlImpl : public GainControl,
   int analog_level_maximum() const override;
   bool stream_is_saturated() const override;
 
-  // ProcessingComponent implementation.
-  void* CreateHandle() const override;
-  int InitializeHandle(void* handle) const override;
-  int ConfigureHandle(void* handle) const override;
-  void DestroyHandle(void* handle) const override;
-  size_t num_handles_required() const override;
-  int GetHandleError(void* handle) const override;
+  size_t num_handles_required() const;
 
   void AllocateRenderQueue();
+  int Configure();
 
   // Not guarded as its public API is thread safe.
   const AudioProcessing* apm_;
@@ -79,13 +75,14 @@ class GainControlImpl : public GainControl,
   rtc::CriticalSection* const crit_render_ ACQUIRED_BEFORE(crit_capture_);
   rtc::CriticalSection* const crit_capture_;
 
+  bool enabled_ = false;
+
   Mode mode_ GUARDED_BY(crit_capture_);
   int minimum_capture_level_ GUARDED_BY(crit_capture_);
   int maximum_capture_level_ GUARDED_BY(crit_capture_);
   bool limiter_enabled_ GUARDED_BY(crit_capture_);
   int target_level_dbfs_ GUARDED_BY(crit_capture_);
   int compression_gain_db_ GUARDED_BY(crit_capture_);
-  std::vector<int> capture_levels_ GUARDED_BY(crit_capture_);
   int analog_capture_level_ GUARDED_BY(crit_capture_);
   bool was_analog_level_set_ GUARDED_BY(crit_capture_);
   bool stream_is_saturated_ GUARDED_BY(crit_capture_);
@@ -99,6 +96,10 @@ class GainControlImpl : public GainControl,
   std::unique_ptr<
       SwapQueue<std::vector<int16_t>, RenderQueueItemVerifier<int16_t>>>
       render_signal_queue_;
+
+  std::vector<std::unique_ptr<GainController>> gain_controllers_;
+
+  RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(GainControlImpl);
 };
 }  // namespace webrtc