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51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/*
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* Copyright (c) 2011 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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/*
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* lpc_analysis.h
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*
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* LPC functions
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*
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*/
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#ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_LPC_ANALYSIS_H_
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#define WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_LPC_ANALYSIS_H_
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#include "settings.h"
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#include "structs.h"
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double WebRtcIsac_LevDurb(double *a, double *k, double *r, int order);
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void WebRtcIsac_GetVars(const double *input, const WebRtc_Word16 *pitchGains_Q12,
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double *oldEnergy, double *varscale);
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void WebRtcIsac_GetLpcCoefLb(double *inLo, double *inHi, MaskFiltstr *maskdata,
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double signal_noise_ratio, const WebRtc_Word16 *pitchGains_Q12,
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double *lo_coeff, double *hi_coeff);
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void WebRtcIsac_GetLpcGain(
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double signal_noise_ratio,
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const double* filtCoeffVecs,
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int numVecs,
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double* gain,
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double corrLo[][UB_LPC_ORDER + 1],
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const double* varscale);
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void WebRtcIsac_GetLpcCoefUb(
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double* inSignal,
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MaskFiltstr* maskdata,
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double* lpCoeff,
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double corr[][UB_LPC_ORDER + 1],
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double* varscale,
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WebRtc_Word16 bandwidth);
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#endif /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_LPC_ANALYIS_H_ */
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