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/*
* Copyright (c) 2014 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 COMMON_AUDIO_VAD_INCLUDE_VAD_H_
#define COMMON_AUDIO_VAD_INCLUDE_VAD_H_
#include <memory>
#include "common_audio/vad/include/webrtc_vad.h"
#include "rtc_base/checks.h"
namespace webrtc {
class Vad {
public:
enum Aggressiveness {
kVadNormal = 0,
kVadLowBitrate = 1,
kVadAggressive = 2,
kVadVeryAggressive = 3
};
enum Activity { kPassive = 0, kActive = 1, kError = -1 };
virtual ~Vad() = default;
// Calculates a VAD decision for the given audio frame. Valid sample rates
// are 8000, 16000, and 32000 Hz; the number of samples must be such that the
// frame is 10, 20, or 30 ms long.
virtual Activity VoiceActivity(const int16_t* audio,
size_t num_samples,
int sample_rate_hz) = 0;
// Resets VAD state.
virtual void Reset() = 0;
};
// Returns a Vad instance that's implemented on top of WebRtcVad.
std::unique_ptr<Vad> CreateVad(Vad::Aggressiveness aggressiveness);
} // namespace webrtc
#endif // COMMON_AUDIO_VAD_INCLUDE_VAD_H_
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