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Bug: webrtc:9878 Change-Id: I356afddb56cc1957e9d0415e2723f66e0e4ac522 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/137517 Reviewed-by: Niels Moller <nisse@webrtc.org> Reviewed-by: Ivo Creusen <ivoc@webrtc.org> Commit-Queue: Sam Zackrisson <saza@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29499}
57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
/*
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* Copyright (c) 2019 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_NOISE_SUPPRESSION_H_
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#define MODULES_AUDIO_PROCESSING_NOISE_SUPPRESSION_H_
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#include <memory>
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#include <vector>
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namespace webrtc {
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class AudioBuffer;
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// The noise suppression (NS) component attempts to remove noise while
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// retaining speech. Recommended to be enabled on the client-side.
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class NoiseSuppression {
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public:
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// Determines the aggressiveness of the suppression. Increasing the level
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// will reduce the noise level at the expense of a higher speech distortion.
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enum class Level { kLow, kModerate, kHigh, kVeryHigh };
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NoiseSuppression(size_t channels, int sample_rate_hz, Level level);
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~NoiseSuppression();
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NoiseSuppression(NoiseSuppression&) = delete;
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NoiseSuppression& operator=(NoiseSuppression&) = delete;
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void AnalyzeCaptureAudio(AudioBuffer* audio);
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void ProcessCaptureAudio(AudioBuffer* audio);
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// LEGACY: Returns the internally computed prior speech probability of current
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// frame averaged over output channels. This is not supported in fixed point,
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// for which |kUnsupportedFunctionError| is returned.
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float speech_probability() const;
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// LEGACY: Returns the size of the noise vector returned by NoiseEstimate().
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static size_t num_noise_bins();
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// LEGACY: Returns the noise estimate per frequency bin averaged over all
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// channels.
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std::vector<float> NoiseEstimate();
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private:
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class Suppressor;
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std::vector<std::unique_ptr<Suppressor>> suppressors_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_NOISE_SUPPRESSION_H_
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