1 /*
2  *  Copyright (c) 2017 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 MODULES_AUDIO_PROCESSING_AEC3_OUTPUT_SELECTOR_H_
12 #define MODULES_AUDIO_PROCESSING_AEC3_OUTPUT_SELECTOR_H_
13 
14 #include "api/array_view.h"
15 #include "rtc_base/constructormagic.h"
16 
17 namespace webrtc {
18 
19 // Performs the selection between which of the linear aec output and the
20 // microphone signal should be used as the echo suppressor output.
21 class OutputSelector {
22  public:
23   OutputSelector();
24   ~OutputSelector();
25 
26   // Forms the most appropriate output signal.
27   void FormLinearOutput(bool use_subtractor_output,
28                         rtc::ArrayView<const float> subtractor_output,
29                         rtc::ArrayView<float> capture);
30 
31   // Returns true if the linear aec output is the one used.
UseSubtractorOutput()32   bool UseSubtractorOutput() const { return use_subtractor_output_; }
33 
34  private:
35   bool use_subtractor_output_ = false;
36   RTC_DISALLOW_COPY_AND_ASSIGN(OutputSelector);
37 };
38 
39 }  // namespace webrtc
40 
41 #endif  // MODULES_AUDIO_PROCESSING_AEC3_OUTPUT_SELECTOR_H_
42