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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /third_party/libwebrtc/modules/audio_processing/vad/voice_activity_detector.h | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/libwebrtc/modules/audio_processing/vad/voice_activity_detector.h')
-rw-r--r-- | third_party/libwebrtc/modules/audio_processing/vad/voice_activity_detector.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_processing/vad/voice_activity_detector.h b/third_party/libwebrtc/modules/audio_processing/vad/voice_activity_detector.h new file mode 100644 index 0000000000..92b9a8c208 --- /dev/null +++ b/third_party/libwebrtc/modules/audio_processing/vad/voice_activity_detector.h @@ -0,0 +1,74 @@ +/* + * Copyright (c) 2015 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_VAD_VOICE_ACTIVITY_DETECTOR_H_ +#define MODULES_AUDIO_PROCESSING_VAD_VOICE_ACTIVITY_DETECTOR_H_ + +#include <stddef.h> +#include <stdint.h> + +#include <memory> +#include <vector> + +#include "common_audio/resampler/include/resampler.h" +#include "modules/audio_processing/vad/common.h" +#include "modules/audio_processing/vad/pitch_based_vad.h" +#include "modules/audio_processing/vad/standalone_vad.h" +#include "modules/audio_processing/vad/vad_audio_proc.h" + +namespace webrtc { + +// A Voice Activity Detector (VAD) that combines the voice probability from the +// StandaloneVad and PitchBasedVad to get a more robust estimation. +class VoiceActivityDetector { + public: + VoiceActivityDetector(); + ~VoiceActivityDetector(); + + // Processes each audio chunk and estimates the voice probability. + // TODO(bugs.webrtc.org/7494): Switch to rtc::ArrayView and remove + // `sample_rate_hz`. + void ProcessChunk(const int16_t* audio, size_t length, int sample_rate_hz); + + // Returns a vector of voice probabilities for each chunk. It can be empty for + // some chunks, but it catches up afterwards returning multiple values at + // once. + const std::vector<double>& chunkwise_voice_probabilities() const { + return chunkwise_voice_probabilities_; + } + + // Returns a vector of RMS values for each chunk. It has the same length as + // chunkwise_voice_probabilities(). + const std::vector<double>& chunkwise_rms() const { return chunkwise_rms_; } + + // Returns the last voice probability, regardless of the internal + // implementation, although it has a few chunks of delay. + float last_voice_probability() const { return last_voice_probability_; } + + private: + // TODO(aluebs): Change these to float. + std::vector<double> chunkwise_voice_probabilities_; + std::vector<double> chunkwise_rms_; + + float last_voice_probability_; + + Resampler resampler_; + VadAudioProc audio_processing_; + + std::unique_ptr<StandaloneVad> standalone_vad_; + PitchBasedVad pitch_based_vad_; + + int16_t resampled_[kLength10Ms]; + AudioFeatures features_; +}; + +} // namespace webrtc + +#endif // MODULES_AUDIO_PROCESSING_VAD_VOICE_ACTIVITY_DETECTOR_H_ |