585aad7323
Internal refactoring of AGC2. This CL is needed in preparation for its child CL to correctly show the upcoming changes in the diff. Bug: webrtc:7494 Change-Id: If7f837e064243d5ffe09e21fc68f489bb00dfdc5 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/234527 Reviewed-by: Hanna Silen <silen@webrtc.org> Commit-Queue: Alessio Bazzica <alessiob@webrtc.org> Cr-Commit-Position: refs/heads/main@{#35170}
65 lines
2.2 KiB
C++
65 lines
2.2 KiB
C++
/*
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* Copyright (c) 2018 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_AGC2_VAD_WRAPPER_H_
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#define MODULES_AUDIO_PROCESSING_AGC2_VAD_WRAPPER_H_
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#include <memory>
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#include "modules/audio_processing/agc2/cpu_features.h"
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#include "modules/audio_processing/include/audio_frame_view.h"
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namespace webrtc {
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// Class to analyze voice activity and audio levels.
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class VadLevelAnalyzer {
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public:
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struct Result {
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float speech_probability; // Range: [0, 1].
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float rms_dbfs; // Root mean square power (dBFS).
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float peak_dbfs; // Peak power (dBFS).
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};
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// Voice Activity Detector (VAD) interface.
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class VoiceActivityDetector {
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public:
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virtual ~VoiceActivityDetector() = default;
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// Resets the internal state.
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virtual void Reset() = 0;
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// Analyzes an audio frame and returns the speech probability.
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virtual float ComputeProbability(AudioFrameView<const float> frame) = 0;
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};
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// Ctor. `vad_reset_period_ms` indicates the period in milliseconds to call
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// `VadLevelAnalyzer::Reset()`; it must be equal to or greater than the
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// duration of two frames. Uses `cpu_features` to instantiate the default VAD.
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VadLevelAnalyzer(int vad_reset_period_ms,
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const AvailableCpuFeatures& cpu_features);
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// Ctor. Uses a custom `vad`.
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VadLevelAnalyzer(int vad_reset_period_ms,
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std::unique_ptr<VoiceActivityDetector> vad);
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VadLevelAnalyzer(const VadLevelAnalyzer&) = delete;
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VadLevelAnalyzer& operator=(const VadLevelAnalyzer&) = delete;
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~VadLevelAnalyzer();
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// Computes the speech probability and the level for `frame`.
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Result AnalyzeFrame(AudioFrameView<const float> frame);
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private:
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std::unique_ptr<VoiceActivityDetector> vad_;
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const int vad_reset_period_frames_;
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int time_to_vad_reset_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AGC2_VAD_WRAPPER_H_
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