56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
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/*
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* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_PROCESSING_AEC3_REVERB_FREQUENCY_RESPONSE_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_REVERB_FREQUENCY_RESPONSE_H_
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#include <array>
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#include <vector>
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#include "absl/types/optional.h"
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#include "api/array_view.h"
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#include "modules/audio_processing/aec3/aec3_common.h"
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namespace webrtc {
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// Class for updating the frequency response for the reverb.
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class ReverbFrequencyResponse {
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public:
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explicit ReverbFrequencyResponse(
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bool use_conservative_tail_frequency_response);
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~ReverbFrequencyResponse();
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// Updates the frequency response estimate of the reverb.
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void Update(const std::vector<std::array<float, kFftLengthBy2Plus1>>&
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frequency_response,
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int filter_delay_blocks,
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const absl::optional<float>& linear_filter_quality,
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bool stationary_block);
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// Returns the estimated frequency response for the reverb.
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rtc::ArrayView<const float> FrequencyResponse() const {
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return tail_response_;
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}
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private:
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void Update(const std::vector<std::array<float, kFftLengthBy2Plus1>>&
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frequency_response,
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int filter_delay_blocks,
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float linear_filter_quality);
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const bool use_conservative_tail_frequency_response_;
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float average_decay_ = 0.f;
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std::array<float, kFftLengthBy2Plus1> tail_response_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_REVERB_FREQUENCY_RESPONSE_H_
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