noise_level_estimator.h (1196B)
1 /* 2 * Copyright (c) 2016 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_AGC2_NOISE_LEVEL_ESTIMATOR_H_ 12 #define MODULES_AUDIO_PROCESSING_AGC2_NOISE_LEVEL_ESTIMATOR_H_ 13 14 #include <memory> 15 16 #include "api/audio/audio_view.h" 17 18 namespace webrtc { 19 class ApmDataDumper; 20 21 // Noise level estimator interface. 22 class NoiseLevelEstimator { 23 public: 24 virtual ~NoiseLevelEstimator() = default; 25 // Analyzes a 10 ms `frame`, updates the noise level estimation and returns 26 // the value for the latter in dBFS. 27 virtual float Analyze(DeinterleavedView<const float> frame) = 0; 28 }; 29 30 // Creates a noise level estimator based on noise floor detection. 31 std::unique_ptr<NoiseLevelEstimator> CreateNoiseFloorEstimator( 32 ApmDataDumper* data_dumper); 33 34 } // namespace webrtc 35 36 #endif // MODULES_AUDIO_PROCESSING_AGC2_NOISE_LEVEL_ESTIMATOR_H_