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