60 lines
1.7 KiB
C++
60 lines
1.7 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_VOICE_DETECTION_H_
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#define MODULES_AUDIO_PROCESSING_VOICE_DETECTION_H_
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#include <stddef.h>
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#include <memory>
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#include "modules/audio_processing/include/audio_processing.h"
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namespace webrtc {
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class AudioBuffer;
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// The voice activity detection (VAD) component analyzes the stream to
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// determine if voice is present.
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class VoiceDetection {
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public:
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// Specifies the likelihood that a frame will be declared to contain voice.
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// A higher value makes it more likely that speech will not be clipped, at
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// the expense of more noise being detected as voice.
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enum Likelihood {
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kVeryLowLikelihood,
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kLowLikelihood,
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kModerateLikelihood,
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kHighLikelihood
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};
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VoiceDetection(int sample_rate_hz, Likelihood likelihood);
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~VoiceDetection();
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VoiceDetection(VoiceDetection&) = delete;
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VoiceDetection& operator=(VoiceDetection&) = delete;
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// Returns true if voice is detected in the current frame.
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bool ProcessCaptureAudio(AudioBuffer* audio);
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Likelihood likelihood() const { return likelihood_; }
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private:
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class Vad;
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int sample_rate_hz_;
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size_t frame_size_samples_;
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Likelihood likelihood_;
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std::unique_ptr<Vad> vad_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_VOICE_DETECTION_H_
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