| /* |
| * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include "webrtc/modules/audio_processing/typing_detection.h" |
| |
| namespace webrtc { |
| |
| TypingDetection::TypingDetection() |
| : time_active_(0), |
| time_since_last_typing_(0), |
| penalty_counter_(0), |
| counter_since_last_detection_update_(0), |
| detection_to_report_(false), |
| new_detection_to_report_(false), |
| time_window_(10), |
| cost_per_typing_(100), |
| reporting_threshold_(300), |
| penalty_decay_(1), |
| type_event_delay_(2), |
| report_detection_update_period_(1) { |
| } |
| |
| TypingDetection::~TypingDetection() {} |
| |
| bool TypingDetection::Process(bool key_pressed, bool vad_activity) { |
| if (vad_activity) |
| time_active_++; |
| else |
| time_active_ = 0; |
| |
| // Keep track if time since last typing event |
| if (key_pressed) |
| time_since_last_typing_ = 0; |
| else |
| ++time_since_last_typing_; |
| |
| if (time_since_last_typing_ < type_event_delay_ && |
| vad_activity && |
| time_active_ < time_window_) { |
| penalty_counter_ += cost_per_typing_; |
| if (penalty_counter_ > reporting_threshold_) |
| new_detection_to_report_ = true; |
| } |
| |
| if (penalty_counter_ > 0) |
| penalty_counter_ -= penalty_decay_; |
| |
| if (++counter_since_last_detection_update_ == |
| report_detection_update_period_) { |
| detection_to_report_ = new_detection_to_report_; |
| new_detection_to_report_ = false; |
| counter_since_last_detection_update_ = 0; |
| } |
| |
| return detection_to_report_; |
| } |
| |
| int TypingDetection::TimeSinceLastDetectionInSeconds() { |
| // Round to whole seconds. |
| return (time_since_last_typing_ + 50) / 100; |
| } |
| |
| void TypingDetection::SetParameters(int time_window, |
| int cost_per_typing, |
| int reporting_threshold, |
| int penalty_decay, |
| int type_event_delay, |
| int report_detection_update_period) { |
| if (time_window) time_window_ = time_window; |
| |
| if (cost_per_typing) cost_per_typing_ = cost_per_typing; |
| |
| if (reporting_threshold) reporting_threshold_ = reporting_threshold; |
| |
| if (penalty_decay) penalty_decay_ = penalty_decay; |
| |
| if (type_event_delay) type_event_delay_ = type_event_delay; |
| |
| if (report_detection_update_period) |
| report_detection_update_period_ = report_detection_update_period; |
| } |
| |
| } // namespace webrtc |
