c6abf6cd3f
Some API deprecation -- ExperimentalAgc and ExperimentalNs are gone. We're continuing to carry iSAC even though it's gone upstream, but maybe we'll want to drop that soon.
44 lines
1.7 KiB
C++
44 lines
1.7 KiB
C++
/*
|
|
* Copyright (c) 2022 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_TRANSIENT_VOICE_PROBABILITY_DELAY_UNIT_H_
|
|
#define MODULES_AUDIO_PROCESSING_TRANSIENT_VOICE_PROBABILITY_DELAY_UNIT_H_
|
|
|
|
#include <array>
|
|
|
|
namespace webrtc {
|
|
|
|
// Iteratively produces a sequence of delayed voice probability values given a
|
|
// fixed delay between 0 and 20 ms and given a sequence of voice probability
|
|
// values observed every 10 ms. Supports fractional delays, that are delays
|
|
// which are not a multiple integer of 10 ms. Applies interpolation with
|
|
// fractional delays; otherwise, returns a previously observed value according
|
|
// to the given fixed delay.
|
|
class VoiceProbabilityDelayUnit {
|
|
public:
|
|
// Ctor. `delay_num_samples` is the delay in number of samples and it must be
|
|
// non-negative and less than 20 ms.
|
|
VoiceProbabilityDelayUnit(int delay_num_samples, int sample_rate_hz);
|
|
|
|
// Handles delay and sample rate changes and resets the delay unit.
|
|
void Initialize(int delay_num_samples, int sample_rate_hz);
|
|
|
|
// Observes `voice_probability` and returns a delayed voice probability.
|
|
float Delay(float voice_probability);
|
|
|
|
private:
|
|
std::array<float, 3> weights_;
|
|
std::array<float, 2> last_probabilities_;
|
|
};
|
|
|
|
} // namespace webrtc
|
|
|
|
#endif // MODULES_AUDIO_PROCESSING_TRANSIENT_VOICE_PROBABILITY_DELAY_UNIT_H_
|