753eada3aa
Corresponds to upstream commit 524e9b043e7e86fd72353b987c9d5f6a1ebf83e1 Update notes: * Pull in third party license file * Replace .gypi files with BUILD.gn to keep track of what changes upstream * Bunch of new filse pulled in as dependencies * Won't build yet due to changes needed on top of these
71 lines
2.5 KiB
C++
71 lines
2.5 KiB
C++
/*
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* Copyright (c) 2015 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 WEBRTC_MODULES_AUDIO_PROCESSING_VAD_VOICE_ACTIVITY_DETECTOR_H_
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#define WEBRTC_MODULES_AUDIO_PROCESSING_VAD_VOICE_ACTIVITY_DETECTOR_H_
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#include <vector>
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#include "webrtc/base/scoped_ptr.h"
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#include "webrtc/common_audio/resampler/include/resampler.h"
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#include "webrtc/modules/audio_processing/vad/vad_audio_proc.h"
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#include "webrtc/modules/audio_processing/vad/common.h"
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#include "webrtc/modules/audio_processing/vad/pitch_based_vad.h"
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#include "webrtc/modules/audio_processing/vad/standalone_vad.h"
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namespace webrtc {
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// A Voice Activity Detector (VAD) that combines the voice probability from the
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// StandaloneVad and PitchBasedVad to get a more robust estimation.
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class VoiceActivityDetector {
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public:
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VoiceActivityDetector();
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// Processes each audio chunk and estimates the voice probability. The maximum
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// supported sample rate is 32kHz.
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// TODO(aluebs): Change |length| to size_t.
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void ProcessChunk(const int16_t* audio, size_t length, int sample_rate_hz);
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// Returns a vector of voice probabilities for each chunk. It can be empty for
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// some chunks, but it catches up afterwards returning multiple values at
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// once.
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const std::vector<double>& chunkwise_voice_probabilities() const {
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return chunkwise_voice_probabilities_;
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}
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// Returns a vector of RMS values for each chunk. It has the same length as
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// chunkwise_voice_probabilities().
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const std::vector<double>& chunkwise_rms() const { return chunkwise_rms_; }
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// Returns the last voice probability, regardless of the internal
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// implementation, although it has a few chunks of delay.
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float last_voice_probability() const { return last_voice_probability_; }
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private:
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// TODO(aluebs): Change these to float.
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std::vector<double> chunkwise_voice_probabilities_;
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std::vector<double> chunkwise_rms_;
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float last_voice_probability_;
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Resampler resampler_;
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VadAudioProc audio_processing_;
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rtc::scoped_ptr<StandaloneVad> standalone_vad_;
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PitchBasedVad pitch_based_vad_;
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int16_t resampled_[kLength10Ms];
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AudioFeatures features_;
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_AUDIO_PROCESSING_VAD_VOICE_ACTIVITY_DETECTOR_H_
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