webrtc/modules/audio_processing/agc2/signal_classifier.h
Mirko Bonadei f0d64a5f9b Reland "Unify OOURA implementations in one directory."
This is a reland of 09b439c6f7

Original change's description:
> Unify OOURA implementations in one directory.
>
> This CL moves the two OOURA implementations present in the WebRTC tree
> in one place.
>
> No functional change is expected.
>
> TBR=kwiberg@webrtc.org
>
> No-Try: True
> Bug: webrtc:11509
> Change-Id: I330a9ec57e3dc65c9c8b43edd4bb295c55920efa
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/173682
> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
> Reviewed-by: Per Åhgren <peah@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#31106}

TBR=kwiberg@webrtc.org, peah@webrtc.org

No-Tree-Checks: True
No-Try: True
Bug: webrtc:11509
Change-Id: Ifc28b0380062ab5aad5c498700aa3cc7f9c7802c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/173720
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Per Åhgren <peah@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31111}
2020-04-20 16:08:19 +00:00

67 lines
1.9 KiB
C++

/*
* Copyright (c) 2016 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_AGC2_SIGNAL_CLASSIFIER_H_
#define MODULES_AUDIO_PROCESSING_AGC2_SIGNAL_CLASSIFIER_H_
#include <memory>
#include <vector>
#include "api/array_view.h"
#include "common_audio/third_party/ooura/fft_size_128/ooura_fft.h"
#include "modules/audio_processing/agc2/down_sampler.h"
#include "modules/audio_processing/agc2/noise_spectrum_estimator.h"
#include "rtc_base/constructor_magic.h"
namespace webrtc {
class ApmDataDumper;
class AudioBuffer;
class SignalClassifier {
public:
enum class SignalType { kNonStationary, kStationary };
explicit SignalClassifier(ApmDataDumper* data_dumper);
~SignalClassifier();
void Initialize(int sample_rate_hz);
SignalType Analyze(rtc::ArrayView<const float> signal);
private:
class FrameExtender {
public:
FrameExtender(size_t frame_size, size_t extended_frame_size);
~FrameExtender();
void ExtendFrame(rtc::ArrayView<const float> x,
rtc::ArrayView<float> x_extended);
private:
std::vector<float> x_old_;
RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(FrameExtender);
};
ApmDataDumper* const data_dumper_;
DownSampler down_sampler_;
std::unique_ptr<FrameExtender> frame_extender_;
NoiseSpectrumEstimator noise_spectrum_estimator_;
int sample_rate_hz_;
int initialization_frames_left_;
int consistent_classification_counter_;
SignalType last_signal_type_;
const OouraFft ooura_fft_;
RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(SignalClassifier);
};
} // namespace webrtc
#endif // MODULES_AUDIO_PROCESSING_AGC2_SIGNAL_CLASSIFIER_H_