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Diffstat (limited to 'webrtc/modules/audio_processing/aec3/moving_average.h')
-rw-r--r-- | webrtc/modules/audio_processing/aec3/moving_average.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/webrtc/modules/audio_processing/aec3/moving_average.h b/webrtc/modules/audio_processing/aec3/moving_average.h new file mode 100644 index 0000000..913d785 --- /dev/null +++ b/webrtc/modules/audio_processing/aec3/moving_average.h @@ -0,0 +1,45 @@ +/* + * Copyright (c) 2018 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. + */ + +#ifndef MODULES_AUDIO_PROCESSING_AEC3_MOVING_AVERAGE_H_ +#define MODULES_AUDIO_PROCESSING_AEC3_MOVING_AVERAGE_H_ + +#include <stddef.h> + +#include <vector> + +#include "api/array_view.h" + +namespace webrtc { +namespace aec3 { + +class MovingAverage { + public: + // Creates an instance of MovingAverage that accepts inputs of length num_elem + // and averages over mem_len inputs. + MovingAverage(size_t num_elem, size_t mem_len); + ~MovingAverage(); + + // Computes the average of input and mem_len-1 previous inputs and stores the + // result in output. + void Average(rtc::ArrayView<const float> input, rtc::ArrayView<float> output); + + private: + const size_t num_elem_; + const size_t mem_len_; + const float scaling_; + std::vector<float> memory_; + size_t mem_index_; +}; + +} // namespace aec3 +} // namespace webrtc + +#endif // MODULES_AUDIO_PROCESSING_AEC3_MOVING_AVERAGE_H_ |