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_MATCHED_FILTER_LAG_AGGREGATOR_H_ 12 #define MODULES_AUDIO_PROCESSING_AEC3_MATCHED_FILTER_LAG_AGGREGATOR_H_ 13 14 #include <vector> 15 16 #include "api/optional.h" 17 #include "modules/audio_processing/aec3/matched_filter.h" 18 #include "rtc_base/constructormagic.h" 19 20 namespace webrtc { 21 22 class ApmDataDumper; 23 24 // Aggregates lag estimates produced by the MatchedFilter class into a single 25 // reliable combined lag estimate. 26 class MatchedFilterLagAggregator { 27 public: 28 MatchedFilterLagAggregator(ApmDataDumper* data_dumper, size_t max_filter_lag); 29 ~MatchedFilterLagAggregator(); 30 31 // Resets the aggregator. 32 void Reset(); 33 34 // Aggregates the provided lag estimates. 35 rtc::Optional<size_t> Aggregate( 36 rtc::ArrayView<const MatchedFilter::LagEstimate> lag_estimates); 37 38 private: 39 ApmDataDumper* const data_dumper_; 40 std::vector<int> histogram_; 41 std::array<int, 250> histogram_data_; 42 int histogram_data_index_ = 0; 43 44 RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(MatchedFilterLagAggregator); 45 }; 46 } // namespace webrtc 47 48 #endif // MODULES_AUDIO_PROCESSING_AEC3_MATCHED_FILTER_LAG_AGGREGATOR_H_ 49