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_ECHO_PATH_VARIABILITY_H_
12 #define MODULES_AUDIO_PROCESSING_AEC3_ECHO_PATH_VARIABILITY_H_
13 
14 namespace webrtc {
15 
16 struct EchoPathVariability {
17   enum class DelayAdjustment {
18     kNone,
19     kBufferReadjustment,
20     kBufferFlush,
21     kDelayReset,
22     kNewDetectedDelay
23   };
24 
25   EchoPathVariability(bool gain_change,
26                       DelayAdjustment delay_change,
27                       bool clock_drift);
28 
AudioPathChangedEchoPathVariability29   bool AudioPathChanged() const {
30     return gain_change || delay_change != DelayAdjustment::kNone;
31   }
32   bool gain_change;
33   DelayAdjustment delay_change;
34   bool clock_drift;
35 };
36 
37 }  // namespace webrtc
38 
39 #endif  // MODULES_AUDIO_PROCESSING_AEC3_ECHO_PATH_VARIABILITY_H_
40