1 /* 2 * Copyright (c) 2014 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 #include "webrtc/modules/audio_processing/typing_detection.h" 12 13 namespace webrtc { 14 15 TypingDetection::TypingDetection() 16 : time_active_(0), 17 time_since_last_typing_(0), 18 penalty_counter_(0), 19 counter_since_last_detection_update_(0), 20 detection_to_report_(false), 21 new_detection_to_report_(false), 22 time_window_(10), 23 cost_per_typing_(100), 24 reporting_threshold_(300), 25 penalty_decay_(1), 26 type_event_delay_(2), 27 report_detection_update_period_(1) { 28 } 29 30 TypingDetection::~TypingDetection() {} 31 32 bool TypingDetection::Process(bool key_pressed, bool vad_activity) { 33 if (vad_activity) 34 time_active_++; 35 else 36 time_active_ = 0; 37 38 // Keep track if time since last typing event 39 if (key_pressed) 40 time_since_last_typing_ = 0; 41 else 42 ++time_since_last_typing_; 43 44 if (time_since_last_typing_ < type_event_delay_ && 45 vad_activity && 46 time_active_ < time_window_) { 47 penalty_counter_ += cost_per_typing_; 48 if (penalty_counter_ > reporting_threshold_) 49 new_detection_to_report_ = true; 50 } 51 52 if (penalty_counter_ > 0) 53 penalty_counter_ -= penalty_decay_; 54 55 if (++counter_since_last_detection_update_ == 56 report_detection_update_period_) { 57 detection_to_report_ = new_detection_to_report_; 58 new_detection_to_report_ = false; 59 counter_since_last_detection_update_ = 0; 60 } 61 62 return detection_to_report_; 63 } 64 65 int TypingDetection::TimeSinceLastDetectionInSeconds() { 66 // Round to whole seconds. 67 return (time_since_last_typing_ + 50) / 100; 68 } 69 70 void TypingDetection::SetParameters(int time_window, 71 int cost_per_typing, 72 int reporting_threshold, 73 int penalty_decay, 74 int type_event_delay, 75 int report_detection_update_period) { 76 if (time_window) time_window_ = time_window; 77 78 if (cost_per_typing) cost_per_typing_ = cost_per_typing; 79 80 if (reporting_threshold) reporting_threshold_ = reporting_threshold; 81 82 if (penalty_decay) penalty_decay_ = penalty_decay; 83 84 if (type_event_delay) type_event_delay_ = type_event_delay; 85 86 if (report_detection_update_period) 87 report_detection_update_period_ = report_detection_update_period; 88 } 89 90 } // namespace webrtc 91
