bcec8b0b21
This is from the upstream library commit id 3326535126e435f1ba647885ce43a8f0f3d317eb, corresponding to Chromium 88.0.4290.1.
42 lines
1.3 KiB
C++
42 lines
1.3 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_RNN_VAD_LP_RESIDUAL_H_
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#define MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_LP_RESIDUAL_H_
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#include <stddef.h>
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#include "api/array_view.h"
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namespace webrtc {
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namespace rnn_vad {
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// LPC inverse filter length.
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constexpr size_t kNumLpcCoefficients = 5;
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// Given a frame |x|, computes a post-processed version of LPC coefficients
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// tailored for pitch estimation.
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void ComputeAndPostProcessLpcCoefficients(
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rtc::ArrayView<const float> x,
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rtc::ArrayView<float, kNumLpcCoefficients> lpc_coeffs);
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// Computes the LP residual for the input frame |x| and the LPC coefficients
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// |lpc_coeffs|. |y| and |x| can point to the same array for in-place
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// computation.
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void ComputeLpResidual(
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rtc::ArrayView<const float, kNumLpcCoefficients> lpc_coeffs,
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rtc::ArrayView<const float> x,
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rtc::ArrayView<float> y);
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} // namespace rnn_vad
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_LP_RESIDUAL_H_
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